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You searched for: Publication year rev 7982-2018 Remove constraint Publication year rev: 7982-2018 Subject term toxicity Remove constraint Subject term: toxicity Subject term Escherichia coli Remove constraint Subject term: Escherichia coli
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1. A Pressure Test to Make 10 Molecules in 90 Days: External Evaluation of Methods to Engineer Biology

Author:
Arturo Casini; Fang-Yuan Chang; Raissa Eluere; Andrew M. King; Eric M. Young; Quentin M. Dudley; Ashty Karim; Katelin Pratt; Cassandra Bristol; Anthony Forget; Amar Ghodasara; Robert Warden-Rothman; Rui Gan; Alexander Cristofaro; Amin Espah Borujeni; Min-Hyung Ryu; Jian Li; Yong-Chan Kwon; He Wang; Evangelos Tatsis; Carlos Rodriguez-Lopez; Sarah O’Connor; Marnix H. Medema; Michael A. Fischbach; Michael C. Jewett; Christopher Voigt; D. Benjamin Gordon
Source:
Journal of the American Chemical Society 2018 v.140 no.12 pp. 4302-4316
ISSN:
1520-5126
Subject:
DNA; Escherichia coli; Saccharomyces cerevisiae; Streptomyces albidoflavus; Streptomyces albovinaceus; Streptomyces coelicolor; anti-infective agents; biosynthesis; cell free system; genetic engineering; industry; medicine; monoterpenoids; tetrahydrofuran; toxicity; vincristine
Abstract:
... Centralized facilities for genetic engineering, or “biofoundries”, offer the potential to design organisms to address emerging needs in medicine, agriculture, industry, and defense. The field has seen rapid advances in technology, but it is difficult to gauge current capabilities or identify gaps across projects. To this end, our foundry was assessed via a timed “pressure test”, in which 3 months ...
DOI:
10.1021/jacs.7b13292

2. A QSAR-based mechanistic study on the combined toxicity of antibiotics and quorum sensing inhibitors against Escherichia coli

Author:
Dali Wang; Junyi Shi; Yanna Xiong; Jingyun Hu; Zhifen Lin; Yanling Qiu; Jinping Cheng
Source:
Journal of hazardous materials 2018 v.341 pp. 438-447
ISSN:
0304-3894
Subject:
Escherichia coli; beta-lactams; ecology; molecular models; proteins; quantitative structure-activity relationships; quorum sensing; risk; sulfonamides; tetracyclines; toxicity; toxicity testing
Abstract:
... Quorum sensing inhibitors (QSIs) have attracted increasing attention due to their potential roles as the antibiotic alternatives. The combination of QSIs and antibiotics in clinical use and their subsequent release into the environment may result in joint effects on the ecology and environment, which has not received enough concerns yet. In this study, eight potential QSIs and three types of commo ...
DOI:
10.1016/j.jhazmat.2017.07.059

3. A methionine-R-sulfoxide reductase, OsMSRB5, is required for rice defense against copper toxicity

Author:
Tengwei Xiao; Mengmeng Mi; Changyong Wang; Meng Qian; Yahua Chen; Luqing Zheng; Hongsheng Zhang; Zhubing Hu; Zhenguo Shen; Yan Xia
Source:
Environmental and experimental botany 2018 v.153 pp. 45-53
ISSN:
0098-8472
Subject:
Escherichia coli; copper; enzyme activity; enzymes; genes; leaves; methionine; mutation; oxidation; oxidative stress; paraquat; phenotype; rice; roots; seedlings; seeds; stems; toxicity; transcription (genetics)
Abstract:
... Methionine sulfoxide reductases (MSRs), a family of enzymes catalyzing the conversion of methionine from its oxidized form into its reduced form, has a pivotal role in responding to oxidative stress. In the present study, we found that OsMSRB5 plays a crucial role in rice adaption to Cu stress. OsMSRB5 was mainly expressed in leaves, with low transcriptional levels of OsMSRB5 observed in seeds, st ...
DOI:
10.1016/j.envexpbot.2018.04.006

4. A novel cry52Ca1 gene from an Indian Bacillus thuringiensis isolate is toxic to Helicoverpa armigera (cotton boll worm)

Author:
Bhupendra S. Panwar; Jaswinder Kaur; Pradyumn Kumar; Sarvjeet Kaur
Source:
Journal of invertebrate pathology 2018 v.159 pp. 137-140
ISSN:
0022-2011
Subject:
Bacillus thuringiensis; Escherichia coli; Helicoverpa armigera; genes; genetic vectors; larvae; lethal concentration 50; neonates; toxicity; transgenic plants
Abstract:
... The novel cry52Ca1 gene from an Indian Bacillus thuringiensis (Bt) isolate was cloned in an expression vector (pET301/CT-DEST, 6xHis). The gene expressed as a ∼77.2 kDa protein in E. coli BL21-CodonPlus (DE3)-RIPL cells upon induction with isopropyl-thio-galactoside (IPTG) for 18 h at 28 °C. Cry52Ca1 protein was toxic to Helicoverpa armigera (cotton bollworm) neonate larvae (LC50 36.66 µg per ml a ...
DOI:
10.1016/j.jip.2018.11.002

5. A phosphorus-enriched biochar fertilizer from bio-fermentation waste: A potential alternative source for phosphorus fertilizers

Author:
Jeong Ae Kim; K. Vijayaraghavan; D. Harikishore Kumar Reddy; Yeoung-Sang Yun
Source:
Journal of cleaner production 2018 v.196 pp. 163-171
ISSN:
0959-6526
Subject:
Escherichia coli; Fourier transform infrared spectroscopy; Lactuca sativa; agricultural industry; bioassays; biochar; citric acid; crops; energy-dispersive X-ray analysis; feedstocks; fermentation industry; hydroculture; microbial biomass; phosphates; phosphorus; phosphorus fertilizers; pyrolysis; recycling; scanning electron microscopy; toxicity; wastes; water solubility
Abstract:
... It is necessary to explore alternative resources for phosphorus (P) in an effort to address the lack of available P source for crops in an agricultural sector. In this study, bacterial biomass waste of Escherichia coli from a fermentation industry was converted to “P-enriched biochar”, and its possibility as a P fertilizer was assessed. Biochar yields (5.2 ± 0.74% to 19.7 ± 1.54%) highly depended ...
DOI:
10.1016/j.jclepro.2018.06.004

6. A poly(3-hydroxybutyrate)–chitosan polymer conjugate for the synthesis of safer gold nanoparticles and their applications

Author:
Daniele Silvestri; Stanisław Wacławek; Bartłomiej Sobel; Rafael Torres-Mendieta; Vít Novotný; Nhung H. A. Nguyen; Alena Ševců; Vinod V. T. Padil; Jana Müllerová; Martin Stuchlík; Marco Petrangeli Papini; Miroslav Černík; Rajender S. Varma
Source:
Green chemistry 2018 v.20 no.21 pp. 4975-4982
ISSN:
1463-9270
Subject:
Escherichia coli; Staphylococcus aureus; aminophenols; catalytic activity; green chemistry; nanogold; p-nitrophenol; polymers; spectroscopy; toxicity
Abstract:
... A facile and eco-friendly approach is developed for the synthesis of a poly(3-hydroxybutyrate)–chitosan (PHB–chit) polymer conjugate, which is an ideal material for the synthesis of safer gold nanoparticles (nAu). The synthesized products are characterized by various electron-based, optical and spectroscopic techniques including the catalytic activity and the stability/toxicity of nAu. In contrast ...
DOI:
10.1039/c8gc02495b

7. A systematic optimization of styrene biosynthesis in Escherichia coli BL21(DE3)

Author:
Changqing Liu; Xiao Men; Hailin Chen; Meijie Li; Zhaorui Ding; Guoqiang Chen; Fan Wang; Haobao Liu; Qian Wang; Youshuang Zhu; Haibo Zhang; Mo Xian
Source:
Biotechnology for biofuels 2018 v.11 no.1 pp. 14
ISSN:
1754-6834
Subject:
Arabidopsis thaliana; Artemisia annua; Escherichia coli; Fagopyrum tataricum; Petroselinum crispum; biosynthesis; gene overexpression; genes; isozymes; liquid state fermentation; microorganisms; phenylalanine ammonia-lyase; plasmids; polymers; screening; shikimate pathway; solvents; styrene; toxicity
Abstract:
... BACKGROUND: Styrene is a versatile commodity petrochemical used as a monomer building-block for the synthesis of many useful polymers. Although achievements have been made on styrene biosynthesis in microorganisms, several bottleneck problems limit factors for further improvement in styrene production. RESULTS: A two-step styrene biosynthesis pathway was developed and introduced into Escherichia c ...
DOI:
10.1186/s13068-018-1017-z
PubMed:
29416559
PubMed Central:
PMC5784704

8. Action mechanism of melittin-derived antimicrobial peptides, MDP1 and MDP2, de novo designed against multidrug resistant bacteria

Author:
Reza Akbari; Mojdeh Hakemi Vala; Ali Hashemi; Hossein Aghazadeh; Jean-Marc Sabatier; Kamran Pooshang Bagheri
Source:
Amino acids 2018 v.50 no.9 pp. 1231-1243
ISSN:
0939-4451
Subject:
DNA; Escherichia coli; Gram-negative bacteria; Pseudomonas aeruginosa; Staphylococcus aureus; antibacterial properties; antibiotics; antimicrobial peptides; bacterial infections; drug therapy; erythrocytes; flow cytometry; fluorometry; humans; hydrophobicity; melittin; multiple drug resistance; scanning electron microscopy; toxicity; tryptophan
Abstract:
... The emergence and dissemination of multidrug resistant (MDR) bacteria are major challenges for antimicrobial chemotherapy of bacterial infections. In this critical condition, cationic antimicrobial peptides are ‘novel’ promising candidate antibiotics to overcome the issue. In this study, we investigated the antibacterial mechanism of new melittin-derived peptides (i.e., MDP1 and MDP2) against mult ...
DOI:
10.1007/s00726-018-2596-5

9. Adaptation in toxic environments: comparative genomics of loci carrying antibiotic resistance genes derived from acid mine drainage waters

Author:
Florence Arsène-Ploetze; Olfa Chiboub; Didier Lièvremont; Julien Farasin; Kelle C. Freel; Stephanie Fouteau; Valérie Barbe
Source:
Environmental science and pollution research international 2018 v.25 no.2 pp. 1470-1483
ISSN:
0944-1344
Subject:
DNA; Escherichia coli; Thiomonas; acid mine drainage; antibiotic resistance; antibiotic resistance genes; bacteria; bacterial communities; clones; cross resistance; drainage water; genomic islands; genomic libraries; gentamicin; habitats; heavy metals; kanamycin; loci; metagenomics; phenotype; rifampicin; toxic substances; toxicity
Abstract:
... Several studies have suggested the existence of a close relationship between antibiotic-resistant phenotypes and resistance to other toxic compounds such as heavy metals, which involve co-resistance or cross-resistance mechanisms. A metagenomic library was previously constructed in Escherichia coli with DNA extracted from the bacterial community inhabiting an acid mine drainage (AMD) site highly c ...
DOI:
10.1007/s11356-017-0535-8

10. Adaptation to the coupling of glycolysis to toxic methylglyoxal production in tpiA deletion strains of Escherichia coli requires synchronized and counterintuitive genetic changes

Author:
Douglas McCloskey; Sibei Xu; Troy E. Sandberg; Elizabeth Brunk; Ying Hefner; Richard Szubin; Adam M. Feist; Bernhard O. Palsson
Source:
Metabolic engineering 2018 v.48 pp. 82-93
ISSN:
1096-7176
Subject:
DNA; Escherichia coli; RNA; biosynthesis; carbon; cell walls; enzyme activity; evolution; genes; glycolysis; metabolites; mutation; phenotype; phosphates; phosphotransferases (kinases); toxicity
Abstract:
... Methylglyoxal is a highly toxic metabolite that can be produced in all living organisms. Methylglyoxal was artificially elevated by removal of the tpiA gene from a growth optimized Escherichia coli strain. The initial response to elevated methylglyoxal and its toxicity was characterized, and detoxification mechanisms were studied using adaptive laboratory evolution. We found that: 1) Multi-omics a ...
DOI:
10.1016/j.ymben.2018.05.012

11. Agglomeration of Escherichia coli with Positively Charged Nanoparticles Can Lead to Artifacts in a Standard Caenorhabditis elegans Toxicity Assay

Author:
Shannon K. Hanna; Antonio R. Montoro Bustos; Alexander W. Peterson; Vytas Reipa; Leona D. Scanlan; Sanem Hosbas Coskun; Tae Joon Cho; Monique E. Johnson; Vincent A. Hackley; Bryant C. Nelson; Michael R. Winchester; John T. Elliott; Elijah J. Petersen
Source:
Environmental science & technology 2018 v.52 no.10 pp. 5968-5978
ISSN:
1520-5851
Subject:
Caenorhabditis elegans; Escherichia coli; coatings; ecotoxicology; environmental science; food availability; gold; growth retardation; nanoparticles; polystyrenes; reproduction; silicon; toxicity
Abstract:
... The increased use and incorporation of engineered nanoparticles (ENPs) in consumer products requires a robust assessment of their potential environmental implications. However, a lack of standardized methods for nanotoxicity testing has yielded results that are sometimes contradictory. Standard ecotoxicity assays may work appropriately for some ENPs with minimal modification but produce artifactua ...
DOI:
10.1021/acs.est.7b06099
PubMed:
29672024
PubMed Central:
PMC6081640

12. Albizia chevalier based Ag nanoparticles: Anti-proliferation, bactericidal and pollutants degradation performance

Author:
Shahid Ali Khan; Bello Aminu Bello; Jalaluddin Awllia Khan; Yasir Anwar; Muqtadir Baig Mirza; Fareed Qadri; Aliya Farooq; Ibrahim Khalil Adam; Abdullah Muhammad Asiri; Sher Bahadar Khan
Source:
Journal of photochemistry and photobiology 2018 v.182 pp. 62-70
ISSN:
1011-1344
Subject:
Albizia; Congo red; Escherichia coli; Fourier transform infrared spectroscopy; Staphylococcus aureus; X-ray diffraction; antibacterial properties; antineoplastic agents; bacterial infections; bark; biosynthesis; carcinogens; cell lines; dose response; energy-dispersive X-ray analysis; nanosilver; neoplasms; p-nitrophenol; pollutants; pollution control; scanning electron microscopy; toxicity; transmission electron microscopy; wastewater
Abstract:
... The eco-friendly biosynthesis of silver nanoparticles (AgNps) from bark extract of Albizia chevalier are reported here for their anti-proliferative, antibacterial and pollutant degradation potentials. The synthesized AgNps were characterized by FTIR spectroscopy, transmission electron microscopy (TEM), field emission scanning electron microscopy (FESEM), energy dispersive X-rays spectrometry (EDS) ...
DOI:
10.1016/j.jphotobiol.2018.03.020

13. An antibacterial collagen membrane crosslinked by the inclusion complex of β-cyclodextrin dialdehyde and ofloxacin for bacterial keratitis

Author:
Yawei Chen; Wenjing Song; Xuan Zhao; Qianqian Han; Li Ren
Source:
RSC advances 2018 v.8 no.32 pp. 18153-18162
ISSN:
2046-2069
Subject:
Escherichia coli; Staphylococcus aureus; adverse effects; antibacterial properties; beta-cyclodextrin; bioavailability; biocompatibility; blindness; collagen; cornea; crosslinking; developing countries; drug therapy; drugs; epithelial cells; humans; keratitis; lysine; mechanical properties; ofloxacin; physical properties; prognosis; risk; surgical transplantation; toxicity
Abstract:
... Infectious keratitis is one of the leading causes of blindness in the world, especially in developing countries. Corneal transplant surgery is a feasible treatment for bacterial keratitis when drug therapy cannot be effective. However, the amount of corneal donors is far from requirements of clinical treatment and thus, the prognosis of bacterial keratitis is not satisfactory. In this study, we de ...
DOI:
10.1039/c8ra02160k

14. An engineered fatty acid synthase combined with a carboxylic acid reductase enables de novo production of 1-octanol in Saccharomyces cerevisiae

Author:
Sandra Henritzi; Manuel Fischer; Martin Grininger; Mislav Oreb; Eckhard Boles
Source:
Biotechnology for biofuels 2018 v.11 no.1 pp. 150
ISSN:
1754-6834
Subject:
Bacillus subtilis; Escherichia coli; Mycobacterium marinum; Saccharomyces cerevisiae; acyl coenzyme A; alcohol dehydrogenase; aldehyde reductase; aldehydes; beta oxidation; biofuels; fatty alcohols; fatty-acid synthase; feedstocks; fermentation; genetically engineered microorganisms; infrastructure; metabolic engineering; mutants; octanoic acid; plasma membrane; secretion; sugars; toxicity; yeasts
Abstract:
... BACKGROUND: The ideal biofuel should not only be a regenerative fuel from renewable feedstocks, but should also be compatible with the existing fuel distribution infrastructure and with normal car engines. As the so-called drop-in biofuel, the fatty alcohol 1-octanol has been described as a valuable substitute for diesel and jet fuels and has already been produced fermentatively from sugars in sma ...
DOI:
10.1186/s13068-018-1149-1
PubMed:
29881455
PubMed Central:
PMC5984327

15. An influence of structural changes in ammonium cations on ecotoxicity of 2,2’-thiodiacetate mono and bis-salts

Author:
R. Biczak; M. Turek; B. Pawłowska; E. Różycka-Sokołowska; B. Marciniak; M. Deska; P. Krupa; I. Jatulewicz; J. Skalik; P. Bałczewski
Source:
Ecotoxicology and environmental safety 2018 v.155 pp. 37-42
ISSN:
0147-6513
Subject:
Aspergillus niger; Crustacea; Escherichia coli; Thanatephorus cucumeris; Trichoderma; Vibrio fischeri; ammonium; antifungal properties; aquatic bacteria; ecotoxicology; environmental impact; fluorescence; heterocyclic compounds; risk; salts; toxicity
Abstract:
... 2,2'-Thiodiacetates with their excellent complexing properties may be used as metal extraction agents, fluorescent and superparamagnetic materials, antibacterial and anticancer medical agents, however there are no data concerning the environmental impact of 2,2'-thiodiacetates derivatives and data definying the potential hazard connected with their use. This study describes the ecotoxicity assessm ...
DOI:
10.1016/j.ecoenv.2018.02.062

16. Anti-inflammatory activities of Aedes aegypti cecropins and their protection against murine endotoxin shock

Author:
Lin Wei; Yang Yang; Yandong Zhou; Min Li; Hailong Yang; Lixian Mu; Qian Qian; Jing Wu; Wei Xu
Source:
Parasites & vectors 2018 v.11 no.1 pp. 470
ISSN:
1756-3305
Subject:
Aedes aegypti; Escherichia coli; Pseudomonas aeruginosa; active ingredients; additive effect; animal models; anti-inflammatory activity; anti-inflammatory agents; blood serum; cecropins; edema; endotoxins; humans; immunity; inducible nitric oxide synthase; interleukin-1beta; interleukin-6; lipopolysaccharides; lungs; macrophages; mice; mitogen-activated protein kinase; mononuclear leukocytes; neutralization; nitrites; signal transduction; therapeutics; toxicity; transcription (genetics); transcription factor NF-kappa B; tumor necrosis factor-alpha
Abstract:
... BACKGROUND: Mosquitoes are armed with physiologically active compounds to suppress the host immunity including host inflammatory reaction. However, the specific anti-inflammatory components in mosquitoes remain unknown. RESULTS: By searching for the immunomodulatory molecules from the mosquito Aedes aegypti (Diptera: Culicidae) at NCBI for anti-inflammatory function, five cecropins (for short in t ...
DOI:
10.1186/s13071-018-3000-8
PubMed:
30107813
PubMed Central:
PMC6092832

17. Antibacterial activity and in situ efficacy of Bidens pilosa Linn and Dichrostachys cinerea Wight et Arn extracts against common diarrhoea-causing waterborne bacteria

Author:
Pfarelo Daphney Shandukani; Shonisani Cathphonia Tshidino; Peter Masoko; Kgabo Maureen Moganedi
Source:
BMC complementary and alternative medicine 2018 v.18 no.1 pp. 171
ISSN:
1472-6882
Subject:
Bidens pilosa; Dichrostachys cinerea; Escherichia coli; acetone; alternative medicine; ammonia; antibacterial properties; antioxidant activity; antioxidants; bacteria; benzene; bromides; cell lines; chemical constituents of plants; chloroform; diarrhea; ethanol; ethyl acetate; formic acid; gastric juice; hexane; leaf extracts; leaves; methanol; methylene chloride; powders; quantitative analysis; secondary metabolites; solvents; surface water; toxicity
Abstract:
... BACKGROUND: Bidens pilosa and Dichrostachys cinerea extracts were investigated for the antibacterial properties against waterborne diarrhoeagenic bacteria. METHODS: The plant materials were extracted using the direct and serial exhaustive methods using solvents of varying polarities, namely, hexane, dichloromethane, ethyl acetate, acetone and methanol. Qualitative phytochemical analysis and quanti ...
DOI:
10.1186/s12906-018-2230-9
PubMed:
29859076
PubMed Central:
PMC5984776

18. Antibacterial activity of extracted bioactive molecules of Schinus terebinthifolius ripened fruits against some pathogenic bacteria

Author:
M.Z.M. Salem; M. El-Hefny; H.M. Ali; H.O. Elansary; R.A. Nasser; A.A.A. El-Settawy; N. El Shanhorey; N.A. Ashmawy; A.Z.M. Salem
Source:
Microbial pathogenesis 2018 v.120 pp. 119-127
ISSN:
0882-4010
Subject:
2,2-diphenyl-1-picrylhydrazyl; Acinetobacter baumannii; Bacillus subtilis; Escherichia coli; Micrococcus luteus; Pseudomonas aeruginosa; Schinus terebinthifolia; Staphylococcus aureus; acetone; alpha-phellandrene; alpha-pinene; antibacterial properties; antioxidant activity; antioxidants; bioactive compounds; butylated hydroxytoluene; essential oils; esters; fruits; gas chromatography-mass spectrometry; hexane; inhibitory concentration 50; minimum inhibitory concentration; oleic acid; palmitic acid; pathogens; tannins; toxicity; virulent strains
Abstract:
... The aim of this work is to identify the chemical constituents and the bioactivity of essential oil (EO), acetone extract (ACE) and n-hexane extract (HexE) of S. terebinthifolius ripened fruits using GC-MS. Total phenolic content and antioxidant activity of extracts were determined using the Folin-Ciocalteu and 1,1-diphenyl-2-picryl-hydrazyl (DPPH) assays, respectively. The toxicity against the gro ...
DOI:
10.1016/j.micpath.2018.04.040

19. Antibiofouling thin-film composite membranes (TFC) by in situ formation of Cu-(m-phenylenediamine) oligomer complex

Author:
B. Rodríguez; D. Oztürk; M. Rosales; M. Flores; A. García
Source:
Journal of materials science 2018 v.53 no.9 pp. 6325-6338
ISSN:
0022-2461
Subject:
Escherichia coli; Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; atomic force microscopy; chlorides; contact angle; copper; desalination; fluorescence microscopy; hydrophilicity; ions; moieties; oxygen; polyamides; polymerization; reverse osmosis; scanning electron microscopy; surface roughness; thin film composite membranes; toxicity
Abstract:
... In situ formation of a Cu-(m-phenylenediamine) (Cu-mPD) oligomer complex from copper chloride during the interfacial polymerization process was successfully employed to produce modified thin-film composite reverse osmosis membranes (TFC-RO) with antibiofouling properties. Membranes were characterized by field emission scanning electron microscopy, Fourier transform infrared spectroscopy (FTIR), X- ...
DOI:
10.1007/s10853-018-2039-4

20. Antimicrobial potency of differently coated 10 and 50 nm silver nanoparticles against clinically relevant bacteria Escherichia coli and Staphylococcus aureus

Author:
Anna-Liisa Kubo; Ivona Capjak; Ivana Vinković Vrček; Olesja M. Bondarenko; Imbi Kurvet; Heiki Vija; Angela Ivask; Kaja Kasemets; Anne Kahru
Source:
Colloids and surfaces 2018 v.170 pp. 401-410
ISSN:
0927-7765
Subject:
Escherichia coli; Staphylococcus aureus; antibiotics; antimicrobial properties; bacteria; bioavailability; cetyltrimethylammonium bromide; citrates; coatings; colloids; exposure duration; health services; minimum inhibitory concentration; nanosilver; polysorbates; polyvinylpyrrolidone; silver; silver nitrate; solubility; toxicity
Abstract:
... Silver nanoparticles (nanoAg) are effective antimicrobials and promising alternatives to traditional antibiotics. This study aimed at evaluating potency of different nanoAg against healthcare infections associated bacteria: Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus. A library of differently coated nanoAg of two different sizes (10 and 50 nm) were prepared using coating ...
DOI:
10.1016/j.colsurfb.2018.06.027

21. Antiplasmodial and trypanocidal activity of violacein and deoxyviolacein produced from synthetic operons

Author:
Elizabeth Bilsland; Tatyana A. Tavella; Renata Krogh; Jamie E. Stokes; Annabelle Roberts; James Ajioka; David R. Spring; Adriano D. Andricopulo; Fabio T. M. Costa; Stephen G. Oliver
Source:
BMC biotechnology 2018 v.18 no.1 pp. 22
ISSN:
1472-6750
Subject:
Escherichia coli; Plasmodium; Trypanosoma; antimalarials; antiviral properties; apoptosis; biosynthesis; drugs; enzymes; in vitro studies; mammals; neoplasm cells; neoplasms; operon; parasites; plasmids; toxicity; tryptophan
Abstract:
... BACKGROUND: Violacein is a deep violet compound that is produced by a number of bacterial species. It is synthesized from tryptophan by a pathway that involves the sequential action of 5 different enzymes (encoded by genes vioA to vioE). Violacein has antibacterial, antiparasitic, and antiviral activities, and also has the potential of inducing apoptosis in certain cancer cells. RESULTS: Here, we ...
DOI:
10.1186/s12896-018-0428-z
PubMed:
29642881
PubMed Central:
PMC5896143

22. Azonaphthalene dyes decolorization and detoxification by laccase from Trametes versicolor

Author:
Barbora Legerská; Daniela Chmelová; Miroslav Ondrejovič
Source:
Nova biotechnologica et chimica 2018 v.17 no.2 pp. 172-180
ISSN:
1338-6905
Subject:
Bacillus subtilis; Candida parapsilosis; Chlorella vulgaris; Coriolus versicolor; Escherichia coli; Micrococcus luteus; Microcystis aeruginosa; Pseudomonas syringae; Saccharomyces cerevisiae; algae; azo dyes; bacteria; decolorization; laccase; toxicity; triazoles; yeasts
Abstract:
... The aim of the present study was to investigate the dye decolorization ability of laccase from Trametes versicolor. Five azonaphthalene dyes (Acid Violet 7, Acid Red 1, Allura Red AC, Orange G and Sunset Yellow FCF) were used to evaluate dye decolorization. Laccase from T. versicolor is capable of decolorizing dyes, namely Acid Violet 7 (53.7±2.3 %) and Orange G (46.0±2.2 %). The less effective ab ...
DOI:
10.2478/nbec-2018-0018

23. Bare and nonionic surfactant-functionalized praseodymium oxide nanoparticles: Toxicological studies

Author:
Priyanka Sharma; Sandeep Kaur; Savita Chaudhary; Ahmad Umar; Rajeev Kumar
Source:
Chemosphere 2018 v.209 pp. 1007-1020
ISSN:
0045-6535
Subject:
Allium cepa; Escherichia coli; Pseudomonas aeruginosa; Salmonella Typhi; Staphylococcus aureus; algae; antibacterial properties; bacteria; biocompatibility; catalytic activity; chromosome aberrations; ecology; genomics; nanoparticles; oxides; oxygen; praseodymium; seed germination; toxicity; toxicity testing; viability; wheat
Abstract:
... The applications of praseodymium oxide (Pr6O11) nanomaterials in catalysis, oxygen storage materials, and optical devices are the emergent areas that possess an urgent requirement for the toxicological evaluation of these nanomaterials to determine their impact on the ecology. In the present work, we have employed a multiassay approach for the toxicological profiling of bare and nonionic surface-m ...
DOI:
10.1016/j.chemosphere.2018.06.041

24. Bilayered Antimicrobial Nanofiber Membranes for Wound Dressings via in Situ Cross-Linking Polymerization and Electrospinning

Author:
Yanping Huang; Nianhua Dan; Weihua Dan; Weifeng Zhao; Zhongxiang Bai; Yining Chen; Changkai Yang
Source:
Industrial & engineering chemistry process design and development 2018 v.57 no.50 pp. 17048-17057
ISSN:
1520-5045
Subject:
Escherichia coli; Staphylococcus aureus; ammonium salts; antibacterial properties; bacteria; cell growth; crosslinking; hydrophilicity; nanofibers; polymerization; process design; quaternary ammonium compounds; toxicity
Abstract:
... The aim of this study was to fabricate a novel bilayered wound dressing with excellent antibacterial performance through electrospinning and in situ cross-linking polymerization. Quaternary ammonium salts ([2-(methacryloyloxy)ethyl] trimethylammonium, MTA) were first polymerized and cross-linked in the presence of polycaprolactone (PCL) to form PCL/PMTA composites. Then, PCL was electrospun as the ...
DOI:
10.1021/acs.iecr.8b03122

25. Biocidal effect of thymol and carvacrol on aquatic organisms: Possible application in ballast water management systems

Author:
Hyunwoo Kim; Sungmin Lee; Beomseok Son; Jaewan Jeon; Daehoon Kim; wonku Lee; HyeSook Youn; Jae-Myung Lee; BuHyun Youn
Source:
Marine pollution bulletin 2018 v.133 pp. 734-740
ISSN:
0025-326X
Subject:
Artemia salina; Escherichia coli; adverse effects; aquatic organisms; ballast water; biocides; carvacrol; disinfection; ecosystems; management systems; thymol; toxicity; water management; water pollution
Abstract:
... Ballast water is essential for maintaining the balance and integrity of a ship. However, exchanging ballast water resulted in discharging water of different origins in vessel recipient ports, and this may have caused ecosystem disturbance or aquatic pollution. The ballast water management (BWM) system is essential for the purification and disinfection of the ballast water that is taken up. Because ...
DOI:
10.1016/j.marpolbul.2018.06.025

26. Biosynthesized silver nanoparticles: Decoding their mechanism of action in Staphylococcus aureus and Escherichia coli

Author:
Melisa A. Quinteros; Cano Aristizabal Viviana; Renné Onnainty; Verónica S. Mary; Martín G. Theumer; Gladys E. Granero; María G. Paraje; Paulina L. Páez
Source:
international journal of biochemistry & cell biology 2018 v.104 pp. 87-93
ISSN:
1357-2725
Subject:
DNA; Escherichia coli; Staphylococcus aureus; antibiotics; bacteria; lipids; mechanism of action; membrane potential; nanosilver; oxidation; oxidative stress; proteins; reactive oxygen species; toxicity
Abstract:
... The oxidative stress generation in bacteria by the presence of antibiotics (in this case silver nanoparticles (AgNPs)) is already widely known. Previously, we demonstrated that AgNPs generate oxidative stress in Staphylococcus aureus and Escherichia coli mediated by the increase of reactive oxygen species (ROS). In this work we are demonstrating the consequences of the oxidative stress by the pres ...
DOI:
10.1016/j.biocel.2018.09.006

27. Biotechnological production of mono- and diamines using bacteria: recent progress, applications, and perspectives

Author:
Volker F. Wendisch; Melanie Mindt; Fernando Pérez-García
Source:
Applied microbiology and biotechnology 2018 v.102 no.8 pp. 3583-3594
ISSN:
0175-7598
Subject:
Corynebacterium glutamicum; Escherichia coli; amino acids; bacteria; diamines; dicarboxylic acids; metabolic engineering; natural gas; petroleum; plastics; polyamides; toxicity
Abstract:
... Common plastics such as polyamides are derived typically from petroleum or natural gas. Fossil-based polyamide production often involves toxic precursors or intermediates. By contrast, bio-based polyamides offer a realistic alternative. Bio-based routes to monomeric precursors of polyamides such as diamines, dicarboxylic acids, and omega-amino acids have been developed. Recent advances in the meta ...
DOI:
10.1007/s00253-018-8890-z

28. Bradyrhizobium japonicum USDA110: A representative model organism for studying the impact of pollutants on soil microbiota

Author:
Vishal Shah; Sanjana Subramaniam
Source:
Science of the total environment 2018 v.624 pp. 963-967
ISSN:
0048-9697
Subject:
Bradyrhizobium japonicum; Escherichia coli; industry; models; nitrogen fixation; pollutants; screening; soil; soil biota; soil fertility; soil microorganisms; toxicity
Abstract:
... Photobacteria phosoreum or Escherichia coli are widely used in the scientific, industrial, and regulatory industries for evaluating the toxicity of pollutants against the soil microbial community. The organisms, however, are not part of the soil microbiota and the toxicity data obtained using these organisms could be misleading. Analysis of microbiota present in the soil obtained from across the w ...
DOI:
10.1016/j.scitotenv.2017.12.185

29. Cadmium selenide quantum dot-zinc oxide composite: Synthesis, characterization, dye removal ability with UV irradiation, and antibacterial activity as a safe and high-performance photocatalyst

Author:
Niyaz Mohammad Mahmoodi; Behzad Karimi; Mahmoud Mazarji; Hassan Moghtaderi
Source:
Journal of photochemistry and photobiology 2018 v.188 pp. 19-27
ISSN:
1011-1344
Subject:
Escherichia coli; Fourier transform infrared spectroscopy; Hirudo; X-ray diffraction; antibacterial properties; atomic force microscopy; cadmium; decolorization; ethanol; human cell lines; human umbilical vein endothelial cells; humans; hydroxyl radicals; in vitro studies; in vivo studies; models; nanocomposites; photocatalysis; photocatalysts; pollutants; quantum dots; scanning electron microscopy; temporal variation; toxicity; ultraviolet radiation; ultraviolet-visible spectroscopy; zinc oxide
Abstract:
... In this paper, cadmium selenide quantum dot (CdSe QD)-zinc oxide (ZnO) nanocomposite (CdSe QD-ZnO) was synthesized and characterized and its photocatalytic dye degradation ability was investigated. The XRD, FTIR, UV–Vis, AFM and SEM were used to characterize the synthesized nanomaterials. The correlation coefficient of pseudo-first-order kinetic reaction is 0.98. The rate constants from 20 to 30 m ...
DOI:
10.1016/j.jphotobiol.2018.08.023

30. Cationic starch: Safe and economic harvesting flocculant for microalgal biomass and inhibiting E. coli growth

Author:
Mehrez E. El-Naggar; Farag A. Samhan; Abeer A.A. Salama; Rehab M. Hamdy; Gamila H. Ali
Source:
International journal of biological macromolecules 2018 v.116 pp. 1296-1303
ISSN:
0141-8130
Subject:
Escherichia coli; Fourier transform infrared spectroscopy; aluminum sulfate; biodegradability; biomass; chlorides; fecal bacteria; flocculants; flocculation; harvesting; microalgae; pH; prices; quaternary ammonium compounds; scanning electron microscopy; starch; toxicity; turbidity; wastewater treatment; Egypt
Abstract:
... Cationized starch-based flocculation processes are the subject of increasing attention because of their non-toxicity, biodegradability and relatively low price synthesized. The study aimed to evaluate the flocculability of different cationic starches using different concentrations of glycidyltrimethylammonium chloride (GTAC) with different degree of substitution (DS) ranged from 0.13 to 0.57. Cati ...
DOI:
10.1016/j.ijbiomac.2018.05.105

31. Characterisation of Anopheles gambiae heme oxygenase and metalloporphyrin feeding suggests a potential role in reproduction

Author:
Christopher S. Spencer; Cristina Yunta; Glauber Pacelli Gomes de Lima; Kay Hemmings; Lu-Yun Lian; Gareth Lycett; Mark J.I. Paine
Source:
Insect biochemistry and molecular biology 2018 v.98 pp. 25-33
ISSN:
0965-1748
Subject:
Anopheles gambiae; Drosophila melanogaster; Escherichia coli; NADP (coenzyme); adults; cytochrome P-450; digestion; dose response; egg production; females; genes; hematophagy; heme; heme oxygenase (biliverdin-producing); iron; malaria; mammals; nutrients; oogenesis; oviposition; pH; sterilizing; tin; toxicity; vector control; Sub-Saharan Africa
Abstract:
... The mosquito Anopheles gambiae is the principal vector for malaria in sub-Saharan Africa. The ability of A. gambiae to transmit malaria is strictly related to blood feeding and digestion, which releases nutrients for oogenesis, as well as substantial amounts of highly toxic free heme. Heme degradation by heme oxygenase (HO) is a common protective mechanism, and a gene for HO exists in the An. gamb ...
DOI:
10.1016/j.ibmb.2018.04.010

32. Characterizing the behavior, uptake, and toxicity of NM300K silver nanoparticles in Caenorhabditis elegans

Author:
Merethe Kleiven; Lisa M. Rossbach; Julian A. Gallego‐Urrea; Dag A. Brede; Deborah H. Oughton; Claire Coutris
Source:
Environmental toxicology and chemistry 2018 v.37 no.7 pp. 1799-1810
ISSN:
0730-7268
Subject:
Caenorhabditis elegans; Escherichia coli; adsorption; bacteria; bioaccumulation; exposure characterization; fractionation; mechanism of action; median effective concentration; models; nanosilver; particle size distribution; reproduction; silver; silver nitrate; toxicity
Abstract:
... Using Caenorhabditis elegans as a model organism, we addressed the potential linkage among toxicity of NM300K Ag nanoparticles (AgNPs), their particle size distribution, and the presence of dissolved Ag in the test media. Of the 3 endpoints assessed (growth, fertility, and reproduction), reproduction was the most sensitive, with the 50% effect concentration (EC50) ranging from 0.26 to 0.84 mg Ag L ...
DOI:
10.1002/etc.4144

33. Chitosan polysaccharide as a renewable functional agent to develop antibacterial, antioxidant activity and colourful shades on wool dyed with tea extract polyphenols

Author:
Shahid-ul-Islam; B.S. Butola; Anasuya Roy
Source:
International journal of biological macromolecules 2018 v.120 pp. 1999-2006
ISSN:
0141-8130
Subject:
Camellia sinensis; Escherichia coli; Food and Drug Administration; Fourier transform infrared spectroscopy; Staphylococcus aureus; antibacterial properties; antioxidant activity; chitosan; color; cosmetics; drugs; dyeing; finishes; hydrogen bonding; industry; mordants; optical properties; polyphenols; scanning electron microscopes; scanning electron microscopy; spectral analysis; tea; thermal stability; thermogravimetry; toxicity; van der Waals forces; wool; woolen fabric
Abstract:
... Chitosan is a potential renewable, versatile amino polysaccharide which has been approved by food and drug administration for use in food, cosmetics, pharmaceuticals and other industries. In order to determine if chitosan can be utilized in the development of colourful and multifunctional wool fabric without the need of toxic metal salt mordants, we have investigated the colouring, radical scaveng ...
DOI:
10.1016/j.ijbiomac.2018.09.167

34. Chitosan/Ag-hydroxyapatite nanocomposite beads as a potential adsorbent for the efficient removal of toxic aquatic pollutants

Author:
Long Li; Jibran Iqbal; Ying Zhu; Peng Zhang; Wanchao Chen; Amit Bhatnagar; Yiping Du
Source:
International journal of biological macromolecules 2018 v.120 pp. 1752-1759
ISSN:
0141-8130
Subject:
Escherichia coli; Fourier transform infrared spectroscopy; adsorbents; adsorption; aqueous solutions; bacteria; chitosan; copper; decontamination; dyes; heavy metals; hydroxyapatite; ions; kinetics; microbial load; moieties; nanocomposites; pH; pollutants; pollution control; rhodamines; river water; scanning electron microscopes; scanning electron microscopy; sorption isotherms; tap water; toxicity
Abstract:
... In the present study, the potential of synthesized chitosan/Ag-substituted hydroxyapatite nanocomposite beads to remove basic dye, heavy metal and microbes from aqueous solutions was investigated. Beads were prepared in different ratios via embedding of Ag-hydroxyapatite (Ag-HA) into chitosan (CS) solution. The beads were characterized by Fourier transform infrared spectroscopy (FT-IR) and scannin ...
DOI:
10.1016/j.ijbiomac.2018.09.190

35. Cloning and sequencing of the gene encoding the enzyme for the reductive cleavage of diaryl ether bonds of 2,3,7,8-tetrachlorodibenzo-p-dioxin in Geobacillus thermodenitrificans UZO 3

Author:
Yuzo Suzuki; Masaya Nakamura; Yuichiro Otsuka; Nao Suzuki; Keisuke Ohyama; Takeshi Kawakami; Kanna Sato-Izawa; Ronald R. Navarro; Shojiro Hishiyama; Kouya Inoue; Toshiji Kameyama; Atsushi Takahashi; Yoshihiro Katayama
Source:
Journal of bioscience and bioengineering 2018 v.126 no.4 pp. 488-496
ISSN:
1389-1723
Subject:
Bacillus subtilis; Bacillus thermodenitrificans; Escherichia coli; amino acid sequences; binding sites; biosynthesis; coenzyme A; models; molecular cloning; operon; riboflavin; sequence analysis; tetrachlorodibenzo-p-dioxin; toxicity; transferases
Abstract:
... We have previously reported that a cell-free extract prepared from Geobacillus thermodenitrificans UZO 3 reductively cleaves diaryl ether bonds of 2,3,7,8-tetrachlorodibenzo-p-dioxin (2,3,7,8-TCDD), a dioxin with the highest toxicity, in a sequential fashion producing 3′,4′,4,5-tetrachloro-2-hydroxydiphenyl ether (TCDE) as the intermediate, and 3,4-dichlorophenol (DCP) as the final reaction produc ...
DOI:
10.1016/j.jbiosc.2018.04.013

36. Combined Strategies to Improve the Expression of Recombinant Sterol C24-Methyltransferase from Leishmania braziliensis in E. coli

Author:
Humberto F. Freitas; Acássia Benjamim Leal Pires; Marcelo S. Castilho
Source:
Molecular biotechnology 2018 v.60 no.4 pp. 271-278
ISSN:
1073-6085
Subject:
Escherichia coli; Leishmania braziliensis; chromatography; cutaneous leishmaniasis; drugs; humans; molecular biology; patients; sterols; toxicity; transferases; tropical diseases
Abstract:
... Among the neglected tropical diseases, leishmaniasis stands out for its worldwide distribution and diversity of symptoms. Cutaneous leishmaniasis (CL), for instance, is endemic in 18 countries, but the available drugs to fight it have high toxicity and low patient adherence. In order to overcome this, dilemma drugs that target enzymes which are absent in the human host, such as Leishmania brazilie ...
DOI:
10.1007/s12033-018-0069-4

37. Comparative antibacterial effects of cellulose nanofiber, chitosan nanofiber, chitosan/cellulose combination and chitosan alone against bacterial contamination of Iranian banknotes

Author:
Simin Zarayneh; Abbas Akhavan Sepahi; Mehdi Jonoobi; Hassan Rasouli
Source:
International journal of biological macromolecules 2018 v.118 pp. 1045-1054
ISSN:
0141-8130
Subject:
Bacillus pumilus; Bacillus subtilis; Brevibacterium; Escherichia coli; Gram-positive bacteria; Micrococcus; Staphylococcus aureus; Stenotrophomonas maltophilia; antibacterial properties; bacterial contamination; cellulose; chitosan; coatings; dose response; durability; nanofibers; synergism; toxicity
Abstract:
... The aims of the current study were to evaluate the antibacterial effects of cellulose nanofiber (CNF), chitosan nanofiber (ChNF), CNF/ChNF combination and chitosan alone (Ch) against the isolated bacterial contaminations from the surface of Iranian banknotes using biochemical, disc diffusion and molecular analyses. The results unveiled that the CNF did not show the significant antibacterial effect ...
DOI:
10.1016/j.ijbiomac.2018.06.160

38. Comparison of antibacterial effects and fumigant toxicity of essential oils extracted from different plants

Author:
Xiao-Fang Tu; Fei Hu; Kiran Thakur; Xiao-Li Li; Ying-Shuo Zhang; Zhao-Jun Wei
Source:
Industrial crops and products 2018 v.124 pp. 192-200
ISSN:
0926-6690
Subject:
Citronella; Escherichia coli; Mentha piperita nothosubsp. piperita; Salmonella Typhimurium; Sitophilus oryzae; Staphylococcus aureus; air; anise; antibacterial properties; bacteria; bacterial growth; camphor; chemical composition; cinnamon; essential oils; eugenol; food preservatives; food spoilage; fumigants; gas chromatography-mass spectrometry; insecticidal properties; lethal concentration 50; methyl chavicol; pepper; pests; phenols; steam distillation; toxicity
Abstract:
... The chemical composition, antibacterial and insecticidal potential of Anise, Peppermint, Clove, Cinnamon, Pepper, Citronella and Camphor essential oils (EOs) extracted by steam distillation from seven different plant species were investigated. GC–MS analysis revealed that terpenes and phenols were the main components of EOs. The different kinds of EOs exerted appreciable antibacterial action again ...
DOI:
10.1016/j.indcrop.2018.07.065

39. Competition for amino acid flux among translation, growth and detoxification in bacteria

Author:
Iolanda Ferro; Irina Chelysheva; Zoya Ignatova
Source:
RNA biology 2018 v.15 no.8 pp. 991-994
ISSN:
1555-8584
Subject:
Escherichia coli; amino acids; bacterial growth; culture media; models; ribosomes; toxicity; transfer RNA; translation (genetics)
Abstract:
... Transfer-tRNAs (tRNAs) are central entities for translation that deliver amino acids to the ribosome to translate genetic information in an mRNA-template dependent manner. Recent discoveries from our laboratory show that in E. coli and B. licheniformis, some tRNAs are poorly charged despite the plentiful intracellular cognate amino acid. Specifically, tRNAs carrying amino acids that exert toxicity ...
DOI:
10.1080/15476286.2017.1306174
PubMed:
28296576
PubMed Central:
PMC6161678

40. Complexation of plasmid DNA and poly(ethylene oxide)/poly(propylene oxide) polymers for safe gene delivery

Author:
Hemant Kumar Daima; Shiv Shankar; Amanda Anderson; Selvakannan Periasamy; Suresh Bhargava; Vipul Bansal
Source:
Environmental chemistry letters 2018 v.16 no.4 pp. 1457-1462
ISSN:
1610-3653
Subject:
Escherichia coli; Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; adverse effects; composite polymers; gel electrophoresis; gene therapy; gene transfer; genes; green fluorescent protein; light scattering; mammals; nanoparticles; phosphates; plasmids; polyethylene glycol; propylene oxide; toxicity; zeta potential
Abstract:
... Gene delivery is the process of introducing foreign genetic material, such as DNA or RNA, into host cells. Gene therapy utilizes gene delivery to deliver genetic material with the goal of treating a disease or condition in the cell. Actual viral vectors may have side effects, while actual systems using metal nanoparticles for gene delivery are toxic. Therefore, we designed here a biocompatible tri ...
DOI:
10.1007/s10311-018-0756-1

41. Datasets generated by shotgun sequencing of metagenomic libraries of the guajataca water reservoir

Author:
Berliza M. Soriano; Laura M. Del Valle-Perez; Luis Morales-Vale; Carlos Rios-Velazquez
Source:
Data in Brief 2018 v.21 pp. 2531-2535
ISSN:
2352-3409
Subject:
DNA; Enterobacter cancerogenus; Enterobacter cloacae; Escherichia coli; anthropogenic activities; antibiotic resistance; data collection; drinking water; eukaryotic cells; irrigation; metagenomics; toxicity; water reservoirs; Puerto Rico
Abstract:
... The Guajataca Water Reservoir (GWR) was constructed for irrigation and to bring potable water to the northwestern region of Puerto Rico. The generation of DNA sequencing data from aquatic bodies (AB) using culture-independent approaches allows the investigation of the total microbial diversity as well as the potential anthropogenic impact. Metagenomic libraries were constructed for two GWR samplin ...
DOI:
10.1016/j.dib.2018.11.114

42. Degradation of 2, 4-dichlorophenol in aqueous solution by dielectric barrier discharge: Effects of plasma-working gases, degradation pathways and toxicity assessment

Author:
Hong Zhang; Qifu Zhang; Chunguang Miao; Qing Huang
Source:
Chemosphere 2018 v.204 pp. 351-358
ISSN:
0045-6535
Subject:
2,4-dichlorophenol; Escherichia coli; active ingredients; aqueous solutions; electric power; free radical scavengers; free radicals; gas chromatography-mass spectrometry; gases; human health; hydroxyl radicals; nitrogen; pH; risk; toxicity; wastewater
Abstract:
... Chlorinated phenols are a class of contaminants found in water and have been regarded as a great potential risk to environment and human health. It is thus urgent to develop effective techniques to remove chlorinated phenols in wastewater. For this purpose, we employed dielectric barrier discharge (DBD) in this work and studied the efficiency of DBD for the degradation of 2,4-dichlorophenol (2,4-D ...
DOI:
10.1016/j.chemosphere.2018.04.052

43. Degradation of various insecticides in cooked eggs during in vitro human digestion

Author:
Hyeong Sang Kim; Sun Jin Hur
Source:
Environmental pollution 2018 v.243 pp. 437-443
ISSN:
0269-7491
Subject:
DDD (pesticide); DDE (pesticide); DDT (pesticide); Escherichia coli; Lactobacillus sakei; bifenthrin; cooking; digestion; egg albumen; eggs; ethane; fipronil; human health; humans; models; pollution; small intestine; toxicity
Abstract:
... The objective of this study was to determine the effects of cooking and in vitro human digestion on the changes of five insecticides—fipronil, bifenthrin, 1,1,1-trichloro-2,2-bis(p-chlorophenyl)ethane (DDT), 1,1-dichloro-2,2-bis(p-chlorophenyl)ethane (DDD), and 2,2-bis(p-chlorophenyl)-1,1-dichloroethylene (DDE)—in egg whites and yolks. Each insecticide was applied to egg whites and yolks at a conc ...
DOI:
10.1016/j.envpol.2018.09.021

44. Design and virtual screening of novel fluoroquinolone analogs as effective mutant DNA GyrA inhibitors against urinary tract infection-causing fluoroquinolone resistant Escherichia coli

Author:
Sakthivel Balasubramaniyan; Navabshan Irfan; Appavoo Umamaheswari; Ayarivan Puratchikody
Source:
RSC advances 2018 v.8 no.42 pp. 23629-23647
ISSN:
2046-2069
Subject:
DNA topoisomerase (ATP-hydrolysing); Escherichia coli; computer simulation; drugs; fluoroquinolones; hydrogen bonding; ligands; mitochondrial DNA; models; molecular dynamics; mutants; mutation; pharmacology; prediction; screening; toxicity; urinary tract; urinary tract diseases; van der Waals forces
Abstract:
... Fluoroquinolones (FQs) belong to the class of quinolone drugs that are used to treat Urinary tract infections (UTIs) through inhibition of E. coli DNA gyrase. Resistance to FQs poses a serious problem in the treatment against resistant strains of E. coli which are associated with Ser83 to Leu and Asp87 to Asn mutations at the quinolone resistance determining region (QRDR) of the GyrA subunit of DN ...
DOI:
10.1039/c8ra01854e

45. Detrimental impact of silica nanoparticles on the nanomechanical properties of Escherichia coli, studied by AFM

Author:
Marion Mathelié-Guinlet; Christine Grauby-Heywang; Axel Martin; Hugo Février; Fabien Moroté; Alexandre Vilquin; Laure Béven; Marie-Hélène Delville; Touria Cohen-Bouhacina
Source:
Journal of colloid and interface science 2018 v.529 pp. 53-64
ISSN:
0021-9797
Subject:
Escherichia coli; adhesion; antibacterial properties; atomic force microscopy; bacteria; cell biology; chemistry; lipopolysaccharides; mechanical properties; models; nanoparticles; peptidoglycans; silica; toxicity
Abstract:
... Despite great innovative and technological promises, nanoparticles (NPs) can ultimately exert an antibacterial activity by affecting the cell envelope integrity. This envelope, by conferring the cell its rigidity and protection, is intimately related to the mechanical behavior of the bacterial surface. Depending on their size, surface chemistry, shape, NPs can induce damages to the cell morphology ...
DOI:
10.1016/j.jcis.2018.05.098

46. Development of a new ecotoxicological assay using the testate amoeba Euglypha rotunda (Rhizaria; Euglyphida) and assessment of the impact of the herbicide S-metolachlor

Author:
Nathalie Amacker; Edward A.D. Mitchell; Benoît J.D. Ferrari; Nathalie Chèvre
Source:
Chemosphere 2018 v.201 pp. 351-360
ISSN:
0045-6535
Subject:
Animalia; Escherichia coli; Euglyphida; cell division; cosmetics; drugs; ecosystems; ecotoxicology; eukaryotic cells; humans; metolachlor; microorganisms; models; nontarget organisms; protists; roots; seedlings; shoots; soil; toxic substances; toxicity; wildlife
Abstract:
... An ever-increasing diversity of potentially toxic chemical compounds are being developed and released into the environment as a result of human activities (e.g. agriculture, drugs, and cosmetics). Among these, pesticides have been shown to affect non-targeted wildlife since the 1960s. A range of ecotoxicological tests are used to assess the toxicity of pesticides on various model organisms. Howeve ...
DOI:
10.1016/j.chemosphere.2018.03.001

47. Eco-friendly approach to the synthesis of silver nanoparticles and their antibacterial activity against Staphylococcus spp. and Escherichia coli

Author:
Katarzyna A. Wolny-Koładka; Dagmara K. Malina
Source:
Journal of environmental science and health 2018 v.53 no.12 pp. 1041-1047
ISSN:
1532-4117
Subject:
Escherichia coli; Gram-negative bacteria; Gram-positive bacteria; Staphylococcus; antibacterial properties; ascorbic acid; chemical reduction; disinfectants; minimum inhibitory concentration; nanosilver; risk assessment; toxicity
Abstract:
... The aim of this study was to assess bactericidal properties of nanosilver obtained with ascorbic acid (vitamin C) as a reducing substance, against environmental strains of Gram-positive (Staphylococcus) and Gram-negative bacteria (Escherichia coli). Silver nanoparticles were obtained by a simple and fast method of chemical reduction in mild synthesis condition using substrates not classified as da ...
DOI:
10.1080/10934529.2018.1474568

48. Effects of Christensenella minuta lipopolysaccharide on RAW 264.7 macrophages activation

Author:
Yingyin Yang; Huawei Gu; Qiuli Sun; Jufang Wang
Source:
Microbial pathogenesis 2018 v.125 pp. 411-417
ISSN:
0882-4010
Subject:
Escherichia coli; Gram-negative bacteria; agonists; biosynthesis; cell proliferation; cytokines; gastrointestinal system; genes; inflammation; lipopolysaccharides; macrophages; nitric oxide; nucleotide sequences; obesity; pathogens; phagocytosis; polyacrylamide gel electrophoresis; reactive oxygen species; signal transduction; toxicity; transcription factor NF-kappa B; virulence; weight loss
Abstract:
... Christensenella minuta (C. minuta) is a gram-negative gastrointestinal bacterium associated with weight loss. However, recent studies have shown that C. minuta might be a potential pathogen and thus limited its application in the control of obesity. Research into the genetic characteristics and pathogenicity of C. minuta remain elusive. As a major virulence factor of gram-negative bacteria, lipopo ...
DOI:
10.1016/j.micpath.2018.10.005

49. Effects of coating materials on antibacterial properties of industrial and sunscreen-derived titanium-dioxide nanoparticles on Escherichia coli

Author:
Soyoung Baek; Sung Hee Joo; Pat Blackwelder; Michal Toborek
Source:
Chemosphere 2018 v.208 pp. 196-206
ISSN:
0045-6535
Subject:
Escherichia coli; antibacterial properties; bioaccumulation; coatings; nanoparticles; particle size; silica; stabilizers; titanium dioxide; toxicity; uncertainty
Abstract:
... Organic or inorganic stabilizers are often used for coating nanoparticles (NPs) in consumer products. However, upon release of stabilized NPs into the environment, uncertainty exists as to the antimicrobial properties of NPs due to stabilizers and the resultant bioaccumulation in organisms. This study investigates antibacterial effects and subsequent mechanisms of TiO2 NPs on Escherichia coli (E.  ...
DOI:
10.1016/j.chemosphere.2018.05.167

50. Effects of surfactants on the combined toxicity of TiO2 nanoparticles and cadmium to Escherichia coli

Author:
Mei Li; Jianchuan Pei; Xiaomeng Tang; Xiaoli Guo
Source:
Journal of environmental sciences (China) 2018 v.74 pp. 126-133
ISSN:
1001-0742
Subject:
Escherichia coli; adsorption; bacteria; bioavailability; cadmium; ecotoxicology; heavy metals; membrane permeability; nanoparticles; pollutants; polysorbates; sodium dodecylbenzenesulfonate; surfactants; titanium dioxide; toxicity
Abstract:
... The combined ecological toxicity of TiO2 nanoparticles (nano-TiO2) and heavy metals has been paid more attention. As the common pollutants in water environment, surfactants could affect the properties of nanoparticles and heavy metals, and thus further influence the combined toxicity of nano-TiO2 and heavy metals. In this study, the effects of sodium dodecyl benzene sulfonate (SDBS) and Tween 80 o ...
DOI:
10.1016/j.jes.2018.02.016