PubAg

Main content area

You searched for: Publication Year 2019 Remove constraint Publication Year: 2019 Subject microparticles Remove constraint Subject: microparticles Subject bacteria Remove constraint Subject: bacteria
Start Over

Search

27  Search Results

« Previous | 1 - 20 of 27 |
Number of results to display per page

Search Results

1. Combination Antibiotic Delivery in PMMA Provides Sustained Broad-Spectrum Antimicrobial Activity and Allows for Postimplantation Refilling

Author:
Cyphert, Erika L.; Lu, Chao-yi; Marques, Dylan W.; Learn, Greg D.; von Recum, Horst A.
Source:
Biomacromolecules 2019 v.21 no.2 pp. 854-866
ISSN:
1526-4602
Subject:
antibiotic resistance; antibiotics; antimicrobial properties; bacteria; beta-cyclodextrin; cement; drugs; mechanical properties; mechanical testing; microparticles; patients; polymethylmethacrylate; surgeons; surgery
Abstract:
... Antibiotics are commonly added to poly(methyl methacrylate) (PMMA) by surgeons to locally treat infections such as in bone cement for joint replacement surgeries, as well as implantable antimicrobial “beads”. However, this strategy is of limited value in high-risk patients where infections can be recurrent or chronic and otherwise hard to treat. Also, when only one drug is incorporated and applied ...
DOI:
10.1021/acs.biomac.9b01523

2. Improved Viability of Microencapsulated Probiotics in a Freeze-Dried Banana Powder During Storage and Under Simulated Gastrointestinal Tract

Author:
Massounga Bora, Awa Fanny; Li, Xiaodong; Zhu, Yongming; Du, Lingling
Source:
Probiotics and antimicrobial proteins 2019 v.11 no.4 pp. 1330-1339
ISSN:
1867-1306
Subject:
Lactobacillus acidophilus; Lactobacillus casei; bacteria; bananas; freeze drying; fructooligosaccharides; gastric juice; gastrointestinal system; microencapsulation; microparticles; nutrients; pH; powders; probiotics; sensory properties; storage temperature; storage time; viability; whey protein isolate
Abstract:
... Freeze-dried banana powder represents an ideal source of nutrients and has not yet been used for probiotic incorporation. In this study, microencapsulation by freeze drying of probiotics Lactobacillus acidophilus and Lactobacillus casei was made using whey protein isolate (WPI), fructooligosaccharides (FOS), and their combination (WPI + FOS) at ratio (1:1). Higher encapsulation yield was found for ...
DOI:
10.1007/s12602-018-9464-1

3. The impact of electrospun films of poly(ε-caprolactone) filled with nanostructured zeolite and silica microparticles on in vitro histamine formation by Staphylococcus aureus and Salmonella Paratyphi A

Author:
Alp-Erbay, Esen; Figueroa-Lopez, Kelly J.; Lagaron, José M.; Çağlak, Emre; Torres-Giner, Sergio
Source:
Food packaging and shelf life 2019 v.22 pp. 100414
ISSN:
2214-2894
Subject:
Salmonella Paratyphi A; Staphylococcus aureus; adsorption; bacteria; composite films; composite materials; culture media; fish; fish products; food packaging; heat stability; histamine; in vitro studies; lactones; microparticles; packaging materials; porosity; shelf life; silica; strength (mechanics); zeolites
Abstract:
... This research study originally reports the preparation and characterization of electrospun films based on poly(ε-caprolactone) (PCL) with high histamine-binding capacity. To this end, submicron PCL fibers filled with nanostructured zeolite or silica (SiO2) microparticles in the 5–20 wt% range were first prepared by solution electrospinning. The resultant electrospun composite fiber mats were there ...
DOI:
10.1016/j.fpsl.2019.100414

4. Exploring electrochemistry of carbon nanodots and its application in noninvasive bacterial growth monitoring

Author:
Das, Ritu; Singh, Neetu
Source:
Biosensors & bioelectronics 2019 v.144 pp. 111640
ISSN:
0956-5663
Subject:
alginates; antibiotic resistance; antibiotics; bacteria; bacterial growth; biochemical pathways; biosensors; carbon; cost effectiveness; disease progression; electrochemistry; encapsulation; growth models; microparticles; monitoring; nanotechnology; pH; plate count; redox potential; screening
Abstract:
... Cost effective and miniaturized methods aiming for high throughput monitoring of bacterial growth are of great significance, especially for tracking disease progression in early stage as well as in screening antibiotic resistant species. Here, we demonstrate an electrochemical platform for noninvasive monitoring of bacterial growth by encapsulating bacterial cells and carbon nanodots in alginate m ...
DOI:
10.1016/j.bios.2019.111640

5. Amidated pleurocidin peptide encapsulated in biodegradable poly(lactide-co-glycolide) microparticles sustains its antibacterial activity against Photobacterium damselae subsp. piscicida in cobia

Author:
Ko, Jing-Chun; Chuang, Shu-Chun; Yang, Chung-Da
Source:
Aquaculture 2019 v.512 pp. 734290
ISSN:
0044-8486
Subject:
Photobacterium damselae subsp. piscicida; Rachycentron canadum; antibacterial properties; antibiotics; antimicrobial peptides; bacteria; biodegradability; encapsulation; etiological agents; fish; fish farms; juveniles; microparticles; mortality; pasteurellosis; polymers; vaccines
Abstract:
... Photobacterium damselae subsp. piscicida (PDP), the causative agent of fish pasteurellosis, has become a serious threat leading to high mortalities in cage-cultured juveniles of cobia (Rachycentron canadum). However, overuse of conventional antibiotics to control the infection raises the emergence of resistant bacteria as well as the presence of residual drugs in animals and the environment. Furth ...
DOI:
10.1016/j.aquaculture.2019.734290

6. Exploration of biogenic nitrogen doped carbon microspheres derived from resorcinol-formaldehyde as anode for lithium and sodium ion batteries

Author:
Karthikeyan, Chandrasekaran; Suresh Babu, G.N.; Maruthamuthu, Sundaram; Kalaiselvi, Nallathamby
Source:
Journal of colloid and interface science 2019 v.554 pp. 9-18
ISSN:
0021-9797
Subject:
ammonia; ammonium bicarbonate; ammonium carbonate; anodes; bacteria; carbon; copolymerization; formaldehyde; lithium; lithium batteries; microparticles; nitrogen; resorcinol
Abstract:
... The study explores biogenic nitrogen doped carbon microspheres derived from resorcinol, formaldehyde (BNCMs), for battery application. Ureolytic bacteria were used to produce biogenic ammonia in the form of ammonium carbonate and ammonium bicarbonate. Copolymerization of resorcinol, formaldehyde and biogenic ammonia at 60–80 °C produces BNCMs. Elemental analysis evidences that the nitrogen-enriche ...
DOI:
10.1016/j.jcis.2019.06.084

7. Microencapsulation of calcium lactobionate for protection from microorganisms in a solid phase food

Author:
Sáez-Orviz, S.; Camilleri, P.; Marcet, I.; Rendueles, M.; Díaz, M.
Source:
Biochemical engineering journal 2019 v.150 pp. 107281
ISSN:
1369-703X
Subject:
bacteria; bioactive compounds; calcium; cottage cheese; digestibility; food matrix; freeze drying; functional foods; gelatin; gum arabic; intestines; maltodextrins; microencapsulation; microparticles; models; prebiotics; protective effect; protein-glutamine gamma-glutamyltransferase; sodium caseinate; water activity
Abstract:
... Prebiotic compounds may be consumed during storage by the foodstuff’s own microflora, so that new processes to protect these bioactive compounds before they are released in the gastrointestinal tract need to be developed. With this aim, lyophilized calcium lactobionate microparticles were designed, employing different coat materials (caseinate, gelatine, gum arabic, maltodextrin and mixtures of gu ...
DOI:
10.1016/j.bej.2019.107281

8. Evaluation of the hydrophobic properties of latex microspheres and Bacillus spores. Influence of the particle size on the data obtained by the MATH method (microbial adhesion to hydrocarbons)

Author:
Faille, Christine; Lemy, Christelle; Allion-Maurer, Audrey; Zoueshtiagh, Farzam
Source:
Colloids and surfaces 2019 v.182 pp. 110398
ISSN:
0927-7765
Subject:
Bacillus (bacteria); adhesion; bacteria; contact angle; hexadecane; hydrophilicity; hydrophobicity; latex; microparticles; particle size; spores
Abstract:
... The current experimental study investigates the influence of latex microsphere particles' size on the assessment of their hydrophilic/hydrophobic character, using the method known as “Microbial Adhesion to Hydrocarbons” (MATH). Since bacteria surfaces often change according to the environment in which they find themselves, most of the experiments here were carried out using the calibrated latex mi ...
DOI:
10.1016/j.colsurfb.2019.110398

9. Enhanced reductive dechlorination of 1,1,1-trichloroethane using zero-valent iron-biochar-carrageenan microspheres: preparation and microcosm study

Author:
Ji, Changling; Meng, Liang; Wang, Hualin
Source:
Environmental science and pollution research international 2019 v.26 no.30 pp. 30584-30595
ISSN:
0944-1344
Subject:
adsorbents; anaerobes; aqueous solutions; bacteria; biochar; biodegradation; calcium chloride; carrageenan; community structure; dechlorination; fermentation; groundwater; iron; microbial communities; microparticles; organic carbon; remediation; scanning electron microscopy; starch
Abstract:
... In this study, a composite remediation material for the enhanced reductive dechlorination (ERD) of 1,1,1-trichloroethane (1,1,1-TCA) in aqueous solution was prepared. This material was comprised of biochar as the carrier and adsorbent, and carrageenan (CG) as the embedding medium to entrap the organic carbon sources and zero-valent iron (ZVI). We determined the suitable biochar dosage and organic ...
DOI:
10.1007/s11356-018-1235-8

10. From beta-cyclodextrin polyelectrolyte to layer-by-layer self-assembly microcapsules: From inhibition of bacterial growth to bactericidal effect

Author:
Belbekhouche, Sabrina; Bousserrhine, Noureddine; Alphonse, Vanessa; Carbonnier, Benjamin
Source:
Food hydrocolloids 2019 v.95 pp. 219-227
ISSN:
0268-005X
Subject:
Escherichia coli; Staphylococcus aureus; acridine orange; adsorption; agar; alginates; antibacterial properties; antibiotics; aqueous solutions; bacteria; bacterial culture; bacterial growth; beta-cyclodextrin; biopolymers; calcium carbonate; chelating agents; chitosan; electrolytes; fluorescence microscopy; hydrocolloids; microparticles; pH; plate count; quartz crystal microbalance; scanning electron microscopy; staining; virulent strains; zeta potential
Abstract:
... Pathogenic bacteria resistance to antimicrobial agents has emerged as a major health issue. Developing new systems enabling inhibitory and bactericidal effects is crucial. Herein, layer-by-layer technique (LbL) was used to fabricate microcapsules composed of biopolymers, cationic polycyclodextrin (P(CD+)) and anionic alginate (alg−). This was achieved through successive adsorption of these polyele ...
DOI:
10.1016/j.foodhyd.2019.04.037

11. Development and validation of an alternative parameter for quantification of signals emitted by fluorescently labelled bacteria in microscopic images

Author:
Tamminga, Gerrit G.; Paulitsch-Fuchs, Astrid H.; Jansen, Gijsbert J.; Euverink, Gert-Jan W.
Source:
Journal of microbiological methods 2019
ISSN:
0167-7012
Subject:
bacteria; fluorescence; latex; microbial ecology; microparticles; propidium; standard deviation
Abstract:
... In this study, an alternative parameter for quantifying the signals of fluorescently labelled bacteria (e.g. propidium iodide, Cyanine 3, etc.) in microscopic images was investigated. Three common parameters (mean grey value (MGV), mean grey value which is corrected for the background (MGVcwB) and the signal to background ratio (SBR) per bacterial cell) are used as reference parameters. As an alte ...
DOI:
10.1016/j.mimet.2019.105717

12. A microfluidic biosensor for online and sensitive detection of Salmonella typhimurium using fluorescence labeling and smartphone video processing

Author:
Wang, Siyuan; Zheng, Lingyan; Cai, Gaozhe; Liu, Ning; Liao, Ming; Li, Yanbin; Zhang, Xibin; Lin, Jianhan
Source:
Biosensors & bioelectronics 2019 v.140 pp. 111333
ISSN:
0956-5663
Subject:
Salmonella Typhimurium; algorithms; bacteria; biosensors; detection limit; fluorescence; fluorescent labeling; food pathogens; food safety; immunomagnetic separation; magnetism; microparticles; mobile telephones; nanoparticles; organ-on-a-chip; screening
Abstract:
... Early screening of foodborne pathogens is a key to ensure food safety. In this study, we developed a microfluidic biosensor for online and sensitive detection of Salmonella based on immunomagnetic separation, fluorescence labeling and smartphone video processing. First, the immune magnetic nanoparticles were used to specifically separate and efficiently concentrate the target bacteria and the magn ...
DOI:
10.1016/j.bios.2019.111333

13. A microfluidic signal-off biosensor for rapid and sensitive detection of Salmonella using magnetic separation and enzymatic catalysis

Author:
Hou, Yu; Cai, Gaozhe; Zheng, Lingyan; Lin, Jianhan
Source:
Food control 2019 v.103 pp. 186-193
ISSN:
0956-7135
Subject:
Salmonella Typhimurium; bacteria; biosensors; catalase; catalytic activity; electric potential difference; food safety; foodborne illness; foods; hydrogen peroxide; lab-on-a-chip technology; magnetic fields; magnetic separation; microparticles; monoclonal antibodies; nanoparticles; organ-on-a-chip; oxygen; polyclonal antibodies; polystyrenes; rapid methods; virulent strains; washing
Abstract:
... The key to prevent and control the spread of foodborne diseases is rapid screening and early warning of pathogenic bacteria in foods. In this study, a microfluidic biosensor using magnetic nanoparticles (MNPs) and catalases was developed for rapid and sensitive detection of Salmonella typhimurium. First, the MNPs modified with anti-Salmonella monoclonal antibodies were used to separate and enrich ...
DOI:
10.1016/j.foodcont.2019.04.008

14. Chitosan composite microparticles: A promising gastroadhesive system for taxifolin

Author:
Stenger Moura, F.C.; Perioli, L.; Pagano, C.; Vivani, R.; Ambrogi, V.; Bresolin, T.M.; Ricci, M.; Schoubben, A.
Source:
Carbohydrate polymers 2019 v.218 pp. 343-354
ISSN:
0144-8617
Subject:
bacteria; chitosan; gastric juice; gastric mucosa; intestinal microorganisms; microparticles; mucus; pepsin; porous media; silica; spray drying; swine; taxifolin; water solubility
Abstract:
... Taxifolin possesses gastroprotective property but is characterized by low water solubility, is instabile in alkaline medium, and is degraded by the intestinal bacteria flora. The purpose of the work was therefore to produce a gastroadhesive formulation to prolong taxifolin residence time and release in the stomach. We first demonstrated that taxifolin is stable in simulated gastric fluid with or w ...
DOI:
10.1016/j.carbpol.2019.04.075

15. Camel whey protein microparticles for safe and efficient delivery of novel camel milk derived probiotics

Author:
Ahmad, Mudasir; Mudgil, Priti; Maqsood, Sajid
Source:
Lebensmittel-Wissenschaft + [i.e. und] Technologie 2019 v.108 pp. 81-88
ISSN:
0023-6438
Subject:
Fourier transform infrared spectroscopy; Pediococcus acidilactici; alpha-glucosidase; bacteria; bioactive properties; camel milk; camels; cell death; death; encapsulation; enzyme inhibition; heat tolerance; in vitro digestion; microparticles; milk; probiotics; raw milk; viability; whey; whey protein
Abstract:
... Novel encapsulating matrix (whey proteins from camel and cow milk) were utilized for encapsulation of a potent probiotic strain (Pediococcus acidilactici) isolated previously from raw camel milk. The bacterial cell death, thermal tolerance, release behaviour, microcapsule characterization and bioactive properties of encapsulated probiotic strain demonstrated upon simulated gastro-intestinal digest ...
DOI:
10.1016/j.lwt.2019.03.008

16. The Storage Efficiency of Immobilized Bradyrhizobium japonicum Strain Using Encapsulation Method

Author:
Krznarić, Dora; Lenkert, Bernarda; Puljko, Ana; Jurić, Slaven; Vinceković, Marko; Kajić, Sanja
Source:
Contemporary Agriculture 2019 v.68 no.1-2 pp. 43-50
ISSN:
2466-4774
Subject:
Bradyrhizobium japonicum; ambient temperature; bacteria; calcium chloride; chitosan; encapsulation; freeze drying; gelation; inoculum; microparticles; mortality; storage temperature; viability
Abstract:
... There is a growing need for new formulations of carriers with better protection for bacterial inoculum. One of the newer techniques in inoculum making is encapsulation method. With this method, the whole bacterial cells are immobilized in defined space – matrix, where the cells are protected from environmental activities before use. Encapsulation of the inoculum was performed with ionic gelation m ...
DOI:
10.2478/contagri-2019-0008

17. Study on the Attachment of <i>Escherichia coli</i> to Sediment Particles at a Single-Cell Level: The Effect of Particle Size

Author:
Wu, Tao; Zhai, Chunhui; Zhang, Jingchao; Zhu, Dejun; Zhao, Kun; Chen, Yongcan
Source:
Water 2019 v.11 no.4
ISSN:
2073-4441
Subject:
Escherichia coli; bacteria; bacterial contamination; glass; microparticles; models; particle size; probability; sediments; silica; surface area
Abstract:
... The attachment of bacteria to sediment particles has a significant impact on the level of bacterial contamination in water. In this work, the attachment of Escherichia coli to particles was investigated with emphasis on the effect of particle size. To exclude the impact of other facts, e.g., the irregularity of particles, we used regular spherical glass particles in addition to natural sediment pa ...
DOI:
10.3390/w11040819

18. Self-assembly kinetics of debranched short-chain glucans from waxy maize starch to form spherical microparticles and its applications

Author:
Luo, Ke; Park, Kyu-Hwan; Lee, Da-Hee; Hong, Chae-Eun; Song, Young-Woon; Yoo, Sang-Ho; Kim, Young-Rok
Source:
Colloids and surfaces 2019 v.176 pp. 352-359
ISSN:
0927-7765
Subject:
amylopectin; antibodies; aqueous solutions; bacteria; colloids; corn starch; crystal structure; growth models; iron oxides; magnetism; microparticles; microstructure; nanoparticles; waxy corn
Abstract:
... Starch microparticles (SMPs) of well-defined size and morphology were synthesized through pullulanase-mediated debranching of waxy maize starch followed by spontaneous re-assembly of the resulting short-chain glucan molecules in aqueous solution. Enzymatic debranching of amylopectins from native starch generated two major fractions corresponding to a smaller glucan and partially digested larger am ...
DOI:
10.1016/j.colsurfb.2019.01.002

19. Physical Inaccessibility of a Resistant Starch Shifts Mouse Gut Microbiota to Butyrogenic Firmicutes

Author:
Kaur, Amandeep; Chen, Tingting; Green, Stefan J.; Mutlu, Ece; Martin, Berdine R.; Rumpagaporn, Pinthip; Patterson, John A.; Keshavarzian, Ali; Hamaker, Bruce R.
Source:
Molecular nutrition & food research 2019 v.63 no.7 pp. e1801012
ISSN:
1613-4125
Subject:
Bacteroidetes; Firmicutes; absorption barrier; amylases; animal models; anti-inflammatory agents; bacteria; butyrates; community structure; digestive system; feces; fermentation; intestinal microorganisms; mice; microbial communities; microparticles; potatoes; resistant starch
Abstract:
... SCOPE: Resistant starch (RS) is utilized by Gram‐negative Bacteroidetes through a starch utilization system (Sus), which requires physical attachment of the bacteria to the substrate. Gram‐positive Firmicutes, which include butyrate producers, utilize RS by other mechanisms, such as amylosomes and secreted amylases/glucoamylases. It has been previously shown that fabricated RS [alginate‐based star ...
DOI:
10.1002/mnfr.201801012

20. Bacillus subtilis immobilization in alginate microfluidic-based microparticles aiming to improve lipase productivity

Author:
Oliveira, Aline F.; Bastos, Reinaldo G.; de la Torre, Lucimara G.
Source:
Biochemical engineering journal 2019 v.143 pp. 110-120
ISSN:
1369-703X
Subject:
Bacillus subtilis; alginates; bacteria; biocatalysts; bioprocessing; carboxylic ester hydrolases; immobilized cells; microfluidic technology; microparticles; nutrient transport
Abstract:
... Biocatalyst immobilization is an important strategy to improve bioprocess productivity. However, conventional immobilization techniques produce non-uniform particles of millimetric size that may affect the cellular response by limiting nutrient transport into the particles. Droplet-based microfluidics can be an alternative to generate homogeneous and micrometric particles resulting in a reduced nu ...
DOI:
10.1016/j.bej.2018.12.014