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You searched for: Journal Journal of agricultural and food chemistry Remove constraint Journal: Journal of agricultural and food chemistry Subject Escherichia coli Remove constraint Subject: Escherichia coli Subject Fourier transform infrared spectroscopy Remove constraint Subject: Fourier transform infrared spectroscopy
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1. Remediation and Mechanisms of Cadmium Biosorption by a Cadmium-Binding Protein from Lentinula edodes

Author:
Dong, Xiao-bo; Huang, Wen; Bian, Yin-bing; Feng, Xi; Ibrahim, Salam A.; Shi, De-fang; Qiao, Xin; Liu, Ying
Source:
Journal of agricultural and food chemistry 2019 v.67 no.41 pp. 11373-11379
ISSN:
1520-5118
Subject:
Escherichia coli; Fourier transform infrared spectroscopy; Lentinula edodes; amino nitrogen; aquatic environment; binding sites; bioremediation; biosorption; cadmium; circular dichroism spectroscopy; fluorescence emission spectroscopy; genetically modified organisms; glutamic acid; histidine; oxygen; proteins
Abstract:
... Cadmium bioremediation with metal-binding proteins is primarily conducted using metallothioneins (MTs). However, in the present study, we investigated a non-MT cadmium-binding protein from Lentinula edodes (LECBP) as a remediation tool for cadmium biosorption in Escherichia coli. The results indicated that the expression of LECBP significantly enhanced the cadmium biosorption capacity of transgeni ...
DOI:
10.1021/acs.jafc.9b04741

2. Hydrophobic Ethylcellulose/Gelatin Nanofibers Containing Zinc Oxide Nanoparticles for Antimicrobial Packaging

Author:
Liu, Yuyu; Li, Yang; Deng, Lingli; Zou, Lin; Feng, Fengqin; Zhang, Hui
Source:
Journal of agricultural and food chemistry 2018 v.66 no.36 pp. 9498-9506
ISSN:
1520-5118
Subject:
Escherichia coli; Fourier transform infrared spectroscopy; Staphylococcus aureus; X-ray diffraction; X-ray photoelectron spectroscopy; antimicrobial packaging; antimicrobial properties; contact angle; energy-dispersive X-ray analysis; food packaging; gelatin; hydrophobicity; mechanical testing; nanofibers; nanoparticles; polymers; reactive oxygen species; scanning electron microscopy; ultraviolet radiation; zinc oxide
Abstract:
... The ethylcellulose/gelatin solutions containing various concentrations of zinc oxide (ZnO) nanoparticles were electrospun, and the resultant nanofibers were characterized by scanning electron microscopy, energy dispersive X-ray, X-ray photoelectron spectrometer, X-ray diffraction, Fourier transform infrared spectroscopy, mechanical testing, water contact angle, and water stability. Results indicat ...
DOI:
10.1021/acs.jafc.8b03267

3. Electrospun Chitosan/Poly(ethylene oxide)/Lauric Arginate Nanofibrous Film with Enhanced Antimicrobial Activity

Author:
Deng, Lingli; Taxipalati, Maierhaba; Zhang, Aiping; Que, Fei; Wei, Hewen; Feng, Fengqin; Zhang, Hui
Source:
Journal of agricultural and food chemistry 2018 v.66 no.24 pp. 6219-6226
ISSN:
1520-5118
Subject:
Escherichia coli; Fourier transform infrared spectroscopy; Staphylococcus aureus; antimicrobial properties; aqueous solutions; cell membranes; chitosan; contact angle; crystal structure; electrostatic interactions; fluorescence; hydrogen bonding; hydrophilicity; melting point; nanofibers; physical properties; polyethylene glycol; thermal analysis
Abstract:
... In this study, chitosan/poly(ethylene oxide) (PEO)/lauric arginate (LAE) composite nanofibrous films were fabricated via electrospinning. The addition of LAE did not change the physical properties of chitosan/PEO in acetic aqueous solutions, but increased the fluorescent intensity of chitosan by electrostatic interactions, resulting in uniform and bead-free nanofibers with an average diameter of 1 ...
DOI:
10.1021/acs.jafc.8b01493

4. Structural Characterization and in Vitro Fermentation of β-Mannooligosaccharides Produced from Locust Bean Gum by GH-26 endo-β-1,4-Mannanase (ManB-1601)

Author:
Srivastava, Praveen Kumar; Panwar, Deepesh; Prashanth, K. V. Harish; Kapoor, Mukesh
Source:
Journal of agricultural and food chemistry 2017 v.65 no.13 pp. 2827-2838
ISSN:
1520-5118
Subject:
Escherichia coli; Fourier transform infrared spectroscopy; Lactobacillus; Listeria monocytogenes; Salmonella Typhi; X-ray diffraction; electrospray ionization mass spectrometry; fermentation; galactose; gel chromatography; hydrolysis; locust bean gum; nuclear magnetic resonance spectroscopy; oligosaccharides; stable isotopes
Abstract:
... Size exclusion chromatography of β-mannooligosaccharides (β-MOS) mixtures, obtained from ManB-1601 hydrolysis of locust bean gum, resulted in separation of oligosaccharides with various degrees of polymerization (DP 2, 3, and 5). The oligosaccharides were structurally [ESI-MS, FTIR, XRD, TGA, and NMR (¹H and ¹³C)] and functionally (in vitro fermentation) characterized. DP2 oligosaccharide was comp ...
DOI:
10.1021/acs.jafc.7b00123

5. Recombinant Wheat Endoplasmic Reticulum Oxidoreductin 1 Improved Wheat Dough Properties and Bread Quality

Author:
Liu, Guang; Wang, JingJing; Hou, Yi; Huang, Yan-Bo; Zhang, Ya-Ping; Li, Cunzhi; Li, Lin; Hu, Song-Qing
Source:
Journal of agricultural and food chemistry 2017 v.65 no.10 pp. 2162-2171
ISSN:
1520-5118
Subject:
Escherichia coli; Fourier transform infrared spectroscopy; breadmaking quality; crosslinking; dough; electrophoresis; endoplasmic reticulum; flour; gel chromatography; gluten; mixing; oxidation; polymers; scanning electron microscopy; sulfhydryl groups; texture; viscoelasticity; wheat
Abstract:
... Recombinant wheat endoplasmic reticulum oxidoreductin 1 (wEro1) with considerable ability was expressed in Escherichia coli. The functional roles of wEro1 in flour processing quality were investigated by farinographic, rheological, texture profile analysis, electrophoresis, size exclusion chromatography, scanning electron microscopy, and Fourier transform infrared spectroscopy. wEro1 exhibited an ...
DOI:
10.1021/acs.jafc.6b05192

6. Dodecenylsuccinic Anhydride Derivatives of Gum Karaya (Sterculia urens): Preparation, Characterization, and Their Antibacterial Properties

Author:
Padil, Vinod Vellora Thekkae; Senan, Chandra; Cernik, Miroslav
Source:
Journal of agricultural and food chemistry 2015 v.63 no.14 pp. 3757-3765
ISSN:
0021-8561
Subject:
Escherichia coli; Fourier transform infrared spectroscopy; Pseudomonas aeruginosa; Staphylococcus aureus; Sterculia urens; alkali treatment; antibacterial properties; antibiotics; aqueous solutions; differential scanning calorimetry; gel chromatography; light scattering; nuclear magnetic resonance spectroscopy; scanning electron microscopy; solubilization; surface tension; thermogravimetry
Abstract:
... Esterifications of the tree-based gum, gum karaya (GK), using dodecenylsuccinic anhydride (DDSA) were carried out in aqueous solutions. GK was deacetylated using alkali treatment to obtain deacetylated gum karaya (DGK). The DGK and its DDSA derivative were characterized using gel permeation chromatography/multiangle laser light scattering (GPC/MALLS), attenuated total reflectance–Fourier transform ...
DOI:
10.1021/jf505783e

7. Synthesis, Characterization, and Antimicrobial Activity of Kojic Acid Grafted Chitosan Oligosaccharide

Author:
Liu, Xiaoli; Xia, Wenshui; Jiang, Qixing; Xu, Yanshun; Yu, Peipei
Source:
Journal of agricultural and food chemistry 2014 v.62 no.1 pp. 297-303
ISSN:
1520-5118
Subject:
Aspergillus niger; Escherichia coli; Fourier transform infrared spectroscopy; Saccharomyces cerevisiae; Staphylococcus aureus; alkylation; antibacterial properties; antibiotics; chitosan; dimethyl sulfoxide; food industry; kojic acid; nuclear magnetic resonance spectroscopy; oligosaccharides; solubility; solvents
Abstract:
... A novel water-soluble chitosan oligosaccharide (COS) derivative, chitosan oligosaccharide/kojic acid grafts assigned as COS/KA, was prepared by using the selective partial alkylation of N-benzylidene COS and chlorokojic acid in the presence of dimethyl sulfoxide (DMSO) and pyridine (Py). The derivative was characterized by UV–vis spectroscopy, FTIR, ¹H NMR, TGA, SEM, and XRD techniques, which show ...
DOI:
10.1021/jf404026f
PubMed:
24364425

8. Impact of the Structural Differences between α- and β-Chitosan on Their Depolymerizing Reaction and Antibacterial Activity

Author:
Jung, Jooyeoun; Zhao, Yanyun
Source:
Journal of agricultural and food chemistry 2013 v.61 no.37 pp. 8783-8789
ISSN:
1520-5118
Subject:
Dosidicus gigas; Escherichia coli; Fourier transform infrared spectroscopy; Listeria innocua; X-ray diffraction; antibacterial properties; chitosan; crystal structure; endo-1,4-beta-glucanase; foods; hydrolysis; shrimp
Abstract:
... The polymeric structure characteristics of β-chitosan from jumbo squid (Dosidicus gigas) pens and α-chitosan from shrimp shells during deploymerization by cellulase hydrolysis at different degrees of deacetylation (DDA) (60, 75, and 90%) were investigated by using Fourier transform infrared spectroscopy and X-ray diffraction. Antibacterial activity of β-chitosan against Escherichia coli and Lister ...
DOI:
10.1021/jf4018965
PubMed:
23909640

9. Antibacterial Electrospun Poly(lactic acid) (PLA) Nanofibrous Webs Incorporating Triclosan/Cyclodextrin Inclusion Complexes

Author:
Kayaci, Fatma; Umu, Ozgun C. O.; Tekinay, Turgay; Uyar, Tamer
Source:
Journal of agricultural and food chemistry 2013 v.61 no.16 pp. 3901-3908
ISSN:
1520-5118
Subject:
Staphylococcus aureus; nanofibers; nuclear magnetic resonance spectroscopy; Escherichia coli; surface area; lactic acid; crystals; food packaging; encapsulation; Fourier transform infrared spectroscopy; coprecipitation; bacteria; antibacterial properties
Abstract:
... Solid triclosan/cyclodextrin inclusion complexes (TR/CD-IC) were obtained and then incorporated in poly(lactic acid) (PLA) nanofibers via electrospinning. α-CD, β-CD, and γ-CD were tested for the formation of TR/CD-IC by a coprecipitation method; however, the findings indicated that α-CD could not form an inclusion complex with TR, whereas β-CD and γ-CD successfully formed TR/CD-IC crystals, and t ...
DOI:
10.1021/jf400440b
PubMed:
23590460

10. Immobilization of Subtilisin on Polycaprolactam for Antimicrobial Food Packaging Applications

Author:
Veluchamy, Prabhawathi; Sivakumar, Ponnurengam Malliappan; Doble, Mukesh
Source:
Journal of agricultural and food chemistry 2011 v.59 no.20 pp. 10869-10878
ISSN:
0021-8561
Subject:
Escherichia coli; Fourier transform infrared spectroscopy; Staphylococcus aureus; biofilm; food packaging; glutaraldehyde; ham; microorganisms; pH; packaging materials; steaks; subtilisin; temperature
Abstract:
... Subtilisin was immobilized on polycaprolactam and used for food packaging applications to reduce the transference of microorganisms from the packaging material to the packaged food material. The optimized conditions for subtilisin immobilization was as follows: pH, 8; temperature, 4 °C; glutaraldehyde, 0.5%; incubation time, 25 h; and subtilisin concentration, 600 μL. The formation of -CH═N- at 15 ...
DOI:
10.1021/jf201124v
PubMed:
21910484

11. Antimicrobial, Mechanical, and Barrier Properties of Cassava Starch-Chitosan Films Incorporated with Oregano Essential Oil

Author:
Pelissari, Franciele M.; Grossmann, Maria V.E.; Yamashita, Fabio; Pineda, Edgardo Alfonso G.
Source:
Journal of agricultural and food chemistry 2009 v.57 no.16 pp. 7499-7504
ISSN:
0021-8561
Subject:
thermal stability; Staphylococcus aureus; Escherichia coli; Salmonella Enteritidis; chitosan; essential oils; mechanical properties; oregano; food pathogens; Fourier transform infrared spectroscopy; Bacillus cereus; cassava starch; edible films; water vapor; permeability; antibacterial properties
Abstract:
... The physicochemical and antimicrobial properties of starch-chitosan films incorporated with oregano essential oil (OEO) have been investigated. The antimicrobial effects of starch-chitosan-OEO films against Bacillus cereus, Escherichia coli, Salmonella enteritidis, and Staphylococcus aureus were determined by the disk inhibition zone method. The film mechanical properties, water vapor permeability ...
DOI:
10.1021/jf9002363
PubMed:
19627142

12. Using Fourier Transform Infrared (FT-IR) Absorbance Spectroscopy and Multivariate Analysis To Study the Effect of Chlorine-Induced Bacterial Injury in Water

Author:
Al-Qadiri, Hamzah M.; Al-Alami, Nivin I.; Al-Holy, Murad A.; Rasco, Barbara A.
Source:
Journal of agricultural and food chemistry 2008 v.56 no.19 pp. 8992-8997
ISSN:
0021-8561
Subject:
Fourier transform infrared spectroscopy; chlorine; multivariate analysis; drinking water; water quality; microbiological quality; bacterial contamination; Escherichia coli; Pseudomonas aeruginosa; food pathogens; bacteria; cell membranes; antibacterial properties; inactivation
Abstract:
... The effect of chlorine-induced bacterial injury on spectral features using Fourier transform infrared (FT-IR) absorbance spectroscopy was studied using a mixed bacterial culture of (1:1) ca. 500 CFU/mL each Escherichia coli ATCC 25922 and Pseudomonas aeruginosa ATCC 15442 in 0.9% saline. Bacterial cells were treated with 0, 0.3, or 1.0 ppm of initial free chlorine (21 °C, 1 h of contact time). Chl ...
DOI:
10.1021/jf801604p
PubMed:
18778073

13. Rapid Detection and Identification of Pseudomonas aeruginosa and Escherichia coli as Pure and Mixed Cultures in Bottled Drinking Water Using Fourier Transform Infrared Spectroscopy and Multivariate Analysis

Author:
Al-Qadiri, H.M.; Al-Holy, M.A.; Lin, M.; Alami, N.I.; Cavinato, A.G.; Rasco, B.A.
Source:
Journal of agricultural and food chemistry 2006 v.54 no.16 pp. 5749-5754
ISSN:
0021-8561
Subject:
bottled water; drinking water; bacterial contamination; Pseudomonas aeruginosa; Escherichia coli; microbial detection; Fourier transform infrared spectroscopy; multivariate analysis; pathogen identification
Abstract:
... Fourier transform infrared (FT-IR) spectroscopy and multivariate analysis were used to identify Pseudomonas aeruginosa and Escherichia coli ATCC 25922 inoculated into bottled drinking water. Three inoculation treatments were examined: (i) E. coli ATCC 25922 (N = 3), (ii) P. aeruginosa (N = 3), and (iii) a 1:1 (v:v) mixed culture of both P. aeruginosa and E. coli ATCC 25922 (N = 3). The control tre ...
DOI:
10.1021/jf0609734