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Journal of Agricultural and Food Chemistry

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https://www.readbyqxmd.com/read/28926236/biofilms-benefiting-plants-exposed-to-zno-and-cuo-nps-studied-with-a-root-mimetic-hollow-fiber-membrane
#1
Michelle Bonebrake, Kaitlyn C Anderson, Jonathan Valiente, Astrid Rosa Jacobson, Joan E McLean, Anne J Anderson, David W Britt
Plants exist with a consortium of microbes that influence plant health, including response to biotic and abiotic stress. While nanoparticle (NP) - plant interactions are increasingly studied, the effect of NPs on the plant microbiome is less researched. Here a root-mimetic hollow fiber membrane (HFM) is presented for generating biofilms of plant-associated microbes nurtured by artificial root exudates (AREs) to correlate exudate composition with biofilm formation and response to NPs. Two microbial isolates from field-grown wheat, a bacillus endophyte and a pseudomonad root surface colonizer, were examined on HFMs fed with AREs varying in N and C composition...
September 19, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28926234/using-ultra-performance-liquid-chromatography-quadrupole-time-of-flight-mass-spectrometry-based-chemometrics-for-the-identification-of-anti-angiogenic-biflavonoids-from-edible-garcinia-species
#2
Ping Li, Grace Gar-Lee Yue, Hin-Fai Kwok, Chun-Lin Long, Clara Bik-San Lau, Edward J Kennelly
Garcinia xanthochymus fruits are edible and also used in traditional medicine. Our previous work showed that the isolated natural products from G. xanthochymus fruits have displayed antioxidant activity and cytotoxicity in the colon cancer cells. In this study, we developed a strategy to correlate a zebrafish angiogenesis assay with ultra-performance liquid chromatography quadrupole time of flight mass spectrometry-based chemometric analysis to identify potential anti-angiogenic activity compounds from G. xanthochymus fruits...
September 19, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28925260/tailoring-the-oxidative-stress-tolerance-of-clostridium-tyrobutyricum-cctcc-w428-by-introducing-trehalose-biosynthetic-capability
#3
Qian Wu, Liying Zhu, Qing Xu, He Huang, Ling Jiang, Shang-Tian Yang
Fermentations employing anaerobes always suffer from the restriction of the stringent anaerobic conditions during the production of bulk and fine chemicals. This work aims to improve the oxidative stress tolerance of C. tyrobutyricum CCTCC W428, an ideal butyric-acid-producing anaerobe, via the introduction of trehalose biosynthesis capability. Compared with the wild type, a wider substrate spectrum, an improved metabolic profile and a significantly increased specific growth rate were shown by the engineered strain upon aeration and acid challenge...
September 19, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28925259/pinus-pinaster-knot-a-source-of-polyphenols-against-plasmopara-viticola
#4
Julien Gabaston, Tristan Richard, Stéphanie Cluzet, Antonio Palos Pinto, Marie-Cécile Dufour, Marie-France Coriocostet, Jean-Michel Merillon
Pine knot extract from Pinus pinaster by-products was characterized by UHPLC-DAD-MS and NMR. Fourteen polyphenols divided in four classes were identified as follows: lignans (nortrachelogenin, pinoresinol, matairesinol, isolariciresinol, secoisolariciresinol), flavonoids (pinocembrin, pinobanksin, dihydrokaempferol, taxifolin), stilbenes (pinosylvin, pinosylvin monomethyl ether, pterostilbene) and phenolic acids (caffeic acid, ferulic acid). The antifungal potential of pine knot extract was tested in vitro against Plasmopara viticola as well as the main compounds...
September 19, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28925252/the-binary-and-tertiary-complex-based-on-short-chain-glucan-and-proanthocyanidins-for-oral-insulin-delivery
#5
Na Ji, Yan Hong, Zhengbiao Gu, Li Cheng, Zhaofeng Li, Caiming Li
The present study was performed to investigate binary and tertiary nanocomposites between short-chain glucan (SCG) and proanthocyanidins (PAC) for the oral delivery of insulin. There was a large decrease in fluorescence intensity of insulin in the presence of SGC or the combination of SGC with PAC. Fourier transform infrared spectroscopy revealed that the binary and tertiary nanocomposites were synthesized due to the hydrogen bonding and hydrophobic interactions. The insulin entrapped in the nanocomposites was in an amorphous state confirmed by X-ray diffraction...
September 19, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28922915/influence-of-fermentation-temperature-yeast-strain-and-grape-juice-on-the-aroma-chemistry-and-sensory-profile-of-sauvignon-blanc-wines
#6
Rebecca Christina Deed, Bruno Fedrizzi, Richard C Gardner
Sauvignon blanc wine, balanced by herbaceous and tropical aromas, is fermented at low temperatures (10-15 °C). Anecdotal accounts from winemakers suggest that cold ferments produce and retain more 'fruity' aroma compounds; nonetheless, studies have not confirmed why low temperatures are optimal for Sauvignon blanc. Thirty-two aroma compounds were quantitated from two Marlborough Sauvignon blanc juices fermented at 12.5 °C and 25 °C, using Saccharomyces cerevisiae strains EC1118, L-1528, M2 and X5. Fourteen compounds were responsible for driving differences in aroma chemistry...
September 19, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28892386/double-mutated-5-enol-pyruvylshikimate-3-phosphate-synthase-protein-expressed-in-mzhg0jg-corn-zea-mays-l-has-no-impact-on-toxicological-safety-and-nutritional-composition
#7
Bethany A Matthews, Karen L Launis, Patricia A Bauman, Nicole C Juba
MZHG0JG corn will offer growers the flexibility to alternate between herbicides with two different modes of action in their weed-management programs, helping to mitigate and manage the evolution of herbicide resistance in weed populations. The proteins conferring herbicide tolerence in MZHG0JG corn, double-mutated 5-enol pyruvylshikimate-3-phosphate synthase protein (mEPSPS) and phosphinothricin acetyltransferase (PAT), as well as the MZHG0JG corn event, have been assessed by regulatory authorities globally and have been determined to be safe for humans, animals, and the environment...
September 19, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28876921/binding-of-gallic-acid-and-epigallocatechin-gallate-to-heat-unfolded-whey-proteins-at-neutral-ph-alters-radical-scavenging-activity-of-in-vitro-protein-digests
#8
Yanyun Cao, Youling L Xiong
Preheated (80 °C for 9 min) whey protein isolate (HWPI) was reacted with 20, 120, and 240 μmol/g (protein basis) gallic acid (GA) or epigallocatechin gallate (EGCG) at neutral pH and 25 °C. Isothermal titration calorimetry and fluorometry showed a similar trend that GA binding to HWPI was moderate but weaker than EGCG binding. However, the shift of maximal fluorescence emission wavelength in opposite directions in response to GA (blue) and EGCG (red) suggests discrepant binding patterns. Electrophoresis results showed that EGCG induced formation of HWPI complexes while GA only had a marginal effect...
September 19, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28876919/cirsium-maritimum-makino-inhibits-the-antigen-immunoglobulin-e-mediated-allergic-response-in-vitro-and-in-vivo
#9
Mamoru Tanaka, Masanobu Suzuki, Yuichiro Takei, Takeaki Okamoto, Hiroyuki Watanabe
We investigated whether Cirsium maritimum Makino can inhibit immunoglobulin-E-mediated allergic response in rat basophilic leukemia (RBL-2H3) cells and passive cutaneous anaphylaxis (PCA) in BALB/c mice. In vitro, the ethyl acetate extract of C. maritimum Makino (ECMM) significantly inhibited β-hexosaminidase release and decreased intracellular Ca(2+) levels in RBL-2H3 cells. Moreover, ECMM leaves more strongly suppressed the release of β-hexosaminidase than ECMM flowers. ECMM leaves also significantly suppressed the PCA reaction in the murine model...
September 19, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28876911/interaction-of-engineered-nanoparticles-with-the-agri-environment
#10
Saheli Pradhan, Damodhara Rao Mailapalli
Nanoparticles with their unique surface properties can modulate the physiological, biochemical, and physicochemical pathways, such as photosynthesis, respiration, nitrogen metabolism, and solute transport. In this context, researchers have developed a wide range of engineered nanomaterials (ENMs) for the improvement of growth and productivity by modulating the metabolic pathways in plants. This class of tailor-made materials can potentially lead to the development of a new group of agrochemical nanofertilizers...
September 19, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28920683/fate-of-flumioxazin-in-aquatic-plants-two-algae-pseudokirchneriella-subcapitata-synechococcus-sp-duckweed-lemna-sp-and-water-milfoil-myriophyllum-elatinoides
#11
Daisuke Ando, Takuo Fujisawa, Toshiyuki Katagi
Flumioxazin separately 14C-labeled at 1,2-positions of the tetrahydrophthalimide moiety or uniformly labeled at the phenyl ring was exposed to two algae and duckweed via water-layer, and water milfoil via water-layer or bottom-sediment for 14 days to investigate uptake and metabolic profiles in these aquatic plants. While 14C-Flumioxazin received immediate hydrolysis through maleimide ring opening and amide bond cleavage with its hydrolytic half-life of <1 day in both water and sediment, the 14C-plant uptake was ≤4...
September 18, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28920678/facing-challenges-in-real-life-application-of-surface-enhanced-raman-scattering-sers-design-and-nanofabrication-of-sers-substrates-for-rapid-field-test-of-food-contaminants
#12
Ruyi Shi, Xiangjiang Liu, Yibin Ying
Surface-enhanced Raman scattering (SERS) is capable of detecting single molecule with high specificity and has become a promising technique for rapid chemical analysis of agricultural products and foods. With a deeper understanding of the SERS effect and advances in nanofabrication technology, SERS is now on the edge of going out of the laboratory and becoming a sophisticated analytical tool to fulfill various real-world tasks. This review focuses on the challenges that SERS has met in this progress, such as how to obtain a reliable SERS signal, improve the sensitivity and specificity in a complex sample matrix, develop simple and user-friendly practical sensing approach, reduce the running cost, etc...
September 18, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28920676/changes-in-amino-acid-profile-in-roots-of-glyphosate-resistant-and-susceptible-soybean-glycine-max-induced-by-foliar-glyphosate-application
#13
Carlos Alberto Moldes, Miguel Angel Cantarelli, José Manuel Camiña, Siu Mui Tsai, Ricardo A Azevedo
Amino acid profiles are useful to analyze the responses to glyphosate in susceptible and resistant soybean lines. Comparisons of profiles for 10 amino acids (Asp, Asn, Glu, Gln, Ser, His, Gly, Thr, Tyr, Leu) by HPLC in soybean roots were performed in two near isogenic pairs (four varieties). Foliar application of glyphosate was applied in soybean plants after 5 weeks of seeding. Roots of four varieties were collected at 0 and 72 h after glyphosate application (AGA) for amino acids analysis by HPLC. Univariate analysis showed a significant increasing of several amino acids in susceptible as well as resistant soybean lines; however, amino acids from carbon (C) and nitrogen (N) metabolism, such as Asp, Asn, Glu and Gln, and Ser, increased significantly in susceptible varieties at 72 h AGA...
September 18, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28920675/mitigation-of-n2o-emission-from-aquaponics-by-optimizing-the-nitrogen-transformation-process-aeration-management-and-exogenous-carbon-pla-addition
#14
Yina Zou, Zhen Hu, Jian Zhang, Yingke Fang, Minying Li, Jianda Zhang
N2O production in aquaponics is an inevitable concern when aquaponics is developed as a future production system. In the present study, two attempts were applied to mitigate N2O emission from aquaponics, i.e., aeration in hydroponic bed (HA) and addition of polylactic acid (PLA) into fillers (PA). Results showed that N2O emission from HA and PA was decreased by 47.1-58.1% and 43.2-74.9% respectively compared with that in control. Denitrification was proved to be the main emission pathway in all treatments, representing 62...
September 18, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28920431/isolation-and-characterization-of-a-novel-highly-selective-astaxanthin-producing-marine-bacterium
#15
Dalal Asker
A high throughput screening approach for astaxanthin-producing bacteria led to the discovery of a novel highly selective astaxanthin-producing marine bacterium (strain N-5). Phylogenetic analysis based on partial 16S rRNA gene and phenotypic metabolic testing indicated it belongs to the genus Brevundimonas. Therefore, it was designated as Brevundimonas sp. strain N-5. To identify and quantify carotenoids produced by strain N-5, HPLC-DAD and HPLC-MS methods were used. The culture conditions including media, shaking and time had significant effects on cell growth and carotenoids production including astaxanthin...
September 18, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28885022/effect-of-storage-on-lactase-treated-%C3%AE-casein-and-%C3%AE-lactoglobulin-with-respect-to-bitter-peptide-formation-and-subsequent-in-vitro-digestibility
#16
Di Zhao, Thao T Le, Søren Drud Nielsen, Lotte Bach Larsen
Using active lactose to hydrolyze lactose during storage is a common process to produce lactose-hydrolyzed (LH) milk. Proteolysis induced by residual proteases in commercial lactase was studied in a system using purified β-casein or β-lactoglobulin during a 60-day storage period at 22 or 38 °C. The proteolysis of β-casein by residual proteases occurred more extensively than that of β-lactoglobulin. Peptidomic analysis by LC-ESI-MS/MS revealed that Ile, Leu, Tyr, and Phe residues near the C-terminus of β-casein were the main sites of cleavage by the residual proteases, generating assumed bitter peptides...
September 18, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28876922/rheological-enhancement-of-pork-myofibrillar-protein-lipid-emulsion-composite-gels-via-glucose-oxidase-oxidation-transglutaminase-cross-linking-pathway
#17
Xu Wang, Youling L Xiong, Hiroaki Sato
Porcine myofibrillar protein (MP) was modified with glucose oxidase (GluOx)-iron that produces hydroxyl radicals then subjected to microbial transglutaminase (TGase) cross-linking in 0.6 M NaCl at 4 °C. The resulting aggregation and gel formation of MP were examined. The GluOx-mediated oxidation promoted the formation of both soluble and insoluble protein aggregates via disulfide bonds and occlusions of hydrophobic groups. The subsequent TGase treatment converted protein aggregates into highly cross-linked polymers...
September 18, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28868886/gastrointestinal-absorption-and-metabolic-dynamics-of-jujuboside-a-a-saponin-derived-from-the-seed-of-ziziphus-jujuba
#18
Panpan Song, Yan Zhang, Guijie Ma, Yanqing Zhang, Aimin Zhou, Junbo Xie
Jujuboside A (JuA), an active saponin, is responsible for the anxiolytic and sedative effects of Zizyphi Spinosae Semen (ZSS). In this study, the gastrointestinal absorption and metabolic dynamics of JuA were investigated in vivo and in vitro. The results showed that the bioavailability was 1.32% in rats, indicating only a trace amount of JuA was able to be absorbed. Further investigation revealed that its poor bioavailability was not caused by malabsorption but by the metabolic process. JuA was hydrolyzed largely in the stomach before being absorbed into the different parts of the intestine (especially duodenum and colon), and the gastric environment played a vital role in this process...
September 18, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28866888/additive-capacity-of-6-shogaol-and-epicatechin-to-trap-methylglyoxal
#19
Qiju Huang, Pei Wang, Yingdong Zhu, Lishuang Lv, Shengmin Sang
Methylglyoxal (MGO), a reactive dicarbonyl species, is thought to contribute to the development of long-term pathological diabetes as a direct toxin or as an active precursor of advanced glycation end products (AGEs). Trapping MGO by dietary phenols to inhibit the MGO induced AGE formation is an approach for alleviating diabetic complications. The present study investigated whether dietary compounds with different structures and active sites have the additive capacity to trap MGO. Ginger phenolic constituent [6]-shogaol and tea flavonoid (-)-epicatechin were selected and tested under simulated physiological conditions, showing that they additively trapped about 41% MGO at a concentration of 10 μM within 24 h...
September 18, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28862839/di-lc-ms-ms-based-metabolic-profiling-for-identification-of-early-predictive-serum-biomarkers-of-metritis-in-transition-dairy-cows
#20
Guanshi Zhang, Qilan Deng, Rupasri Mandal, David S Wishart, Burim N Ametaj
The objectives of this study were to evaluate alterations of metabolites in the blood of dairy cows before, during, and after diagnosis of metritis and identify predictive serum metabolite biomarkers for metritis. DI/LC-MS/MS was used to analyze serum samples collected from both healthy and metritic cows during -8, -4, disease diagnosis, +4, and +8 wks relative to parturition. Results indicated that cows with metritis experienced altered concentrations of serum amino acids, glycerophospholipids, sphingolipids, acylcarnitines, and biogenic amines during the entire experimental period...
September 18, 2017: Journal of Agricultural and Food Chemistry
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