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Journal of Agricultural and Food Chemistry

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https://www.readbyqxmd.com/read/29792425/roasted-barley-extract-mugi-cha-containing-cyclo-d-phe-l-pro-prevents-lowering-of-cutaneous-blood-flow-and-skin-temperature-under-air-conditioning-a-randomized-double-blind-placebo-controlled-crossover-study
#1
Hiroshi Ashigai, Mai Mizutani, Yoshimasa Taniguchi, Yasuko Matsukura, Keiko Nakashima, Emiko Ikeshima, Hiroaki Yajima
Roasted barley extract (RBE), also known as mugi-cha, is a well-known healthy non-caffeinated beverage and its health functionality has been widely reported. Our previous clinical study showed that RBE affects cutaneous blood flow and skin temperature after cold water immersion, and that cyclo (D-Phe-L-Pro) is responsible for its effect. In this study, we investigated whether cyclo (D-Phe-L-Pro)-containing RBE prevents the decrease in cutaneous blood flow and skin temperature in an excessively air-conditioned room...
May 24, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29792322/metabolism-of-phenolic-compounds-in-lps-stimulated-raw264-7-cells-can-impact-their-anti-inflammatory-efficacy-indication-of-hesperetin
#2
Yong Ma, Yu He, Taijun Yin, Haoqing Chen, Song Gao, Ming Hu
Raw264.7 is a murine macrophage-like cell line commonly used to study the anti-inflammatory efficacy of natural compounds. However, the impacts of long-time incubation on the tested compounds are often inappropriately ignored. Among 77 natural phenolic compounds (mainly flavonoids), only 36 remain more than 70% after a 15-hour incubation in cell culture medium at 37 °C. Interestingly, for those compounds with a relatively good chemical stability, the presence of Raw264.7 cells could accelerate their disappearance in the medium, indicating that cellular metabolism occurred...
May 24, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29792318/condensed-tannin-reacts-with-so2-during-wine-aging-yielding-flavan-3-ol-sulfonates
#3
Lingjun Ma, Aude Annie Watrelot, Bennett Addison, Andrew L Waterhouse
Numerous monomeric and oligomeric flavanol sulfonation products were observed in 10 wines. Levels of 0.85-20.06 mg/L and 0-14.72 mg/L were quantified for two monomeric sulfonated flavan-3-ols, and surprisingly, were generally higher than the well-known native flavan-3-ol monomers. Increasing SO2 levels during wine aging increased the sulfonate modified flavan-3-ol monomers and dimers along with higher concentrations of native monomers. The results indicate that >10% of SO2 is reacting with the C4 carbocation, formed from acid cleavage of the interflavan bond, perhaps by a bimolecular SN2 type reaction, and as a reducing agent...
May 24, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29790749/anti-inflammatory-activity-of-8-hydroxydaidzein-in-lps-stimulated-bv2-microglial-cells-via-activation-of-nrf2-antioxidant-and-attenuation-of-akt-nf-%C3%AE%C2%BAb-inflammatory-signaling-pathways-as-well-as-inhibition-of-cox-2-activity
#4
Pei-Shan Wu, Hsiou-Yu Ding, Jui-Hung Yen, Shu-Fen Chen, Kuan-Han Lee, Ming-Jiuan Wu
It was demonstrated that isoflavones can cross the blood-brain barrier, making them desirable candidate agents for the prevention of neurological symptoms. 8-Hydroxydaidzein (8-OHD, 4',7,8-trihydoxyisoflavone) is an isoflavone found only in fermented soy food. Current results showed that 8-OHD inhibited LPS-stimulated production of nitric oxide (NO) and proinflammatory cytokines, such as tumor necrosis factor (TNF)-α and interleukin (IL)-6, by inhibiting gene expression in BV2 microglial cells. Moreover, 8-OHD markedly quenched reactive oxygen species (ROS) and activated NF-E2-related factor 2 (Nrf2) so as to upregulate expression of Phase II enzymes, including heme oxygenase (HO)-1, NAD(P)H quinone dehydrogenase 1 (NQO1), and the modifier subunit of glutamate cysteine ligase (GCLM)...
May 23, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29790747/characterization-of-the-potent-aroma-compounds-in-preserved-egg-yolk-by-gas-chromatography-olfactometry-quantitative-measurements-and-odor-activity-value
#5
Yu Zhang, Yuping Liu, Wenxi Yang, Jia Huang, Yingqiao Liu, Mingquan Huang, Baoguo Sun, Changlin Li
To characterize potent odor-active compounds in preserved egg yolk (PEY), volatile compounds were isolated by headspace solid-phase microextraction and solvent-assisted flavor evaporation. Gas chromatography-olfactometry (GC-O) and gas chromatography-mass spectrometry (GC-MS) analyses identified a total of 53 odor-active compounds by comparing the odor characteristics, MS data, and retention indices with those of reference compounds. Twenty-seven odorants were detected in at least 5 isolates that were extracted and analyzed by the same method, and their flavor dilution (FD) factors, ranging from 1 to 2048, were measured by aroma extract dilution analysis (AEDA)...
May 23, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29790745/vanillin-ameliorated-the-development-of-azoxymethane-dextran-sodium-sulfate-induced-murine-colorectal-cancer-the-involvement-of-proteasome-nuclear-factor-%C3%AE%C2%BAb-mitogen-activated-protein-kinase-pathways
#6
Jung-Miao Li, Yu-Chen Lee, Chia-Cheng Li, Hsin-Yi Lo, Feng-Yuan Chen, Yi-Siou Chen, Chien-Yun Hsiang, Tin-Yun Ho
Vanillin is a natural dietary flavoring widely used in food industry. Colorectal cancer (CRC) is one of the common malignancies in the world. Chronic intestinal inflammation is a risk factor for the development of CRC. We have previously found that vanillin improves and prevents colitis in mice. Here we evaluated the inhibitory activities of vanillin on a mouse model of colitis-induced CRC. Mice were challenged intraperitoneally with azoxymethane (AOM) and orally with dextran sodium sulfate (DSS). Various dosages of vanillin were orally administered for 13 consecutive weeks...
May 23, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29790345/characterization-of-the-major-odor-active-compounds-in-dry-jujubes-cultivars-by-application-of-gas-chromatography-olfactometry-and-odor-activity-value
#7
Zuobing Xiao, Jiancai Zhu
The volatile compounds of jujube (Ziziphus jujube Mill.) puree obtained from three cultivars: 'jinsixiaozao' (Y1), 'youzao' (Y2), and 'yuzao' (Y3) were analyzed by gas chromatography-olfactometry (GC-O), gas chromatography-mass spectrometry, GC-flame photometric detection, and nitrogen phosphorus detector. The results showed that a total of 37, 37, and 35 odor-active compounds were identified by GC-O in samples of Y1, Y2, and Y3, respectively. In addition, the odor activity value (OAV) was used to determine the important compounds...
May 23, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29787679/dynamic-proteome-alteration-and-functional-modulation-of-human-saliva-induced-by-dietary-chemosensory-stimuli
#8
Matthias Bader, Andreas Dunkel, Mareike Wenning, Bernd Kohler, Guillaume Medard, Estela Del Castillo, Amin Gholami, Bernhard Kuster, Siegfried Scherer, Thomas Hofmann
Saliva flow measurements and SDS-PAGE separation of human whole saliva freshly collected after oral stimulation with citric acid (sour), aspartame (sweet), iso-α-acids (bitter), mono sodium L-glutamate (umami), NaCl (salty), 6-gingerol (pungent), hydroxy-α-sanshool (tingling), and hydroxy-β-sanshool (numbing), followed by tryptic digestion, nano-HPLC-MS/MS, and label-free protein quantitation demonstrated a stimulus- and time-dependent influence of the dietary chemosensates on salivation and the salivary proteome composition...
May 22, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29787258/the-mode-of-action-of-adjuvants-relevance-of-physicochemical-properties-for-effects-on-the-foliar-application-cuticular-permeability-and-greenhouse-performance-of-pinoxaden
#9
Katja Arand, Elisabeth Asmus, Christian Popp, Daniel Schneider, Markus Riederer
We comprehensively studied the complexity of mode of action of adjuvants by uncoupling the parameters contributing to the spray process during foliar application of agrochemicals. The ethoxylated sorbitan esters Tween 20 and Tween 80 improved the efficiency of Pinoxaden (PXD) in controlling grass-weed species in greenhouse experiments by aiding retention, having humectant properties, maintaining the bioavailability and increasing the cuticular penetration of PXD. The non-ethoxylated sorbitan esters Span 20 and Span 80 showed minimal effects on retention, droplet hydration or cuticular penetration, resulting in poor PXD effects in the greenhouse...
May 22, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29786427/diallyl-trisulfide-induces-apoptosis-of-human-papillary-thyroid-carcinoma-bcpap-cells-through-activating-mapk-signaling-pathway
#10
Jie Pan, Li Zhang, Shichen Xu, Xian Cheng, Huixin Yu, Jiandong Bao, Rong-Rong Lu
This study aimed to elucidate the potential effects of diallyl trisulfide (DATS) on human papillary thyroid carcinoma BCPAP cells and its underling mechanisms. DATS is one of the organosulfur compounds which derived from garlic. In this study, we demonstrated that compared to the solvent control, DATS treatment at concentrations of 5, 10 and 20 μΜ decreased cell survival rate of BCPAP cells to 84.51 ± 2.67%, 57.16 ± 1.18%, 41.22 ± 1.19% respectively. DATS also caused cell cycle arrest at G0/G1 phase and the proportion of cells arrested in G0/G1 phase rose from 68...
May 22, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29786425/comprehensive-study-of-the-evolution-of-gas-liquid-partitioning-of-acetaldehyde-during-wine-alcoholic-fermentation
#11
Evelyne Aguera, Yannick Sire, Jean-Roch Mouret, Jean-Marie Sablayrolles, Vincent Farines
Determining the gas-liquid partitioning (K_i) of acetaldehyde during alcoholic fermentation is an important step in the optimization of fermentation control with the aim of minimizing the accumulation of this compound responsible for the undesired attributes of green apples and fresh cut grass in wines. In this work, the effect of the main fermentation parameters on the K_i of acetaldehyde was assessed. K_i values were found to be dependent on the temperature and composition of the medium. A non-linear correlation between the evolution of the K_i and fermentation progress was observed, attributed to the strong retention effect of ethanol at low concentrations and it was demonstrated that the partitioning of this specific molecule was not influenced by the CO2 production rate...
May 22, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29785849/dietary-carotenoid-roles-in-redox-homeostasis-and-human-health
#12
Marcelo Paes Barros, Maria J Rodrigo, Lorenzo Zacarias
Classic nutrition believed that healthy diets should simply provide sufficient antioxidant loads to organisms, to hamper free radical processes and avoid oxidative stress. Current redox biology was proven much more intricate. Carotenoids are bioactive compounds in human diet with a multifaceted role in redox metabolism. This review discusses the participation of α/β-carotene, lutein, zeaxanthin, lycopene, β-cryptoxanthin, astaxanthin, and derivatives in redox homeostasis focusing on: (i) their anti-/pro-oxidant activities; (ii) control of gene expression via Nrf2-Keap1 and NF-ΚB pathways; and (iii) their link with (sub)cellular redox circuits, as part of the 'redox code' that orchestrates physiological processes and health in humans...
May 22, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29783845/carnitine-a-new-precursor-in-the-formation-of-the-plant-growth-regulator-mepiquat
#13
Yuan Yuan, Xuenan Li, Huangyou Liu, Yating Qu, Wantong Zhang, Huilin Yu, Jiaojiao Zhang, Hong Zhuang
Carnitine is demonstrated as an effective methyl donor in the formation of the plant growth regulator N, N-dimethylpiperidinium (mepiquat), encompassing either N-methylation / decarboxylation of pipecolic acid, or Maillard pathways followed by transmethylation reactions. The formation of mepiquat and the intermediate compounds was monitored (180-300 °C, up to 180 min) using HPLC-MS/MS in different binary or ternary model systems comprised of (i) lysine/fructose/carnitine, (ii) lysine/glucose/carnitine, or (iii) pipecolic acid (PipAc)/carnitine...
May 22, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29783841/nitration-of-tyrosine-in-the-mucin-glycoprotein-of-edible-bird-s-nest-changes-its-color-from-white-to-red
#14
Eric Kian-Shiun Shim, Soo-Ying Lee
The edible bird's nest (EBN) of the swiftlet Aerodramus fuciphagus, a mucin glycoprotein, is usually white in color, but there also exist the more desirable red or 'blood' EBN. The basis of the red color has been a puzzle for a long time. Here, we show that the nitration of the tyrosyl residue to the 3-nitrotyrosyl (3-NTyr) residue in the glycoprotein is the cause of the red color. Evidences for the 3-NTyr residue come from: (a) the quantitative analysis of 3-NTyr in EBN by ELISA, (b) the UV-Vis absorption spectra of red EBN as a function of pH being similar to 3-nitrotyrosine (3-NT), (c) the change in the color of red EBN from yellow at low pH to red at high pH just like 3-NT, and (d) strong Raman nitro bands at 1330 cm-1 (symmetric -NO2 stretch) and 825 cm-1 (-NO2 scissoring bend) for red EBN...
May 22, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29782166/toxicokinetics-tissue-distribution-and-excretion-of-dufulin-racemate-and-its-r-s-enantiomers-in-rats
#15
Huaguo Chen, Xin Zhou, Baoan Song
Dufulin is a plant antiviral agent with a novel molecular structure and has been used widely to prevent and control tobacco and rice viral diseases. In this study, an UHPLC-MS/MS assay was developed for rapid determination of dufulin racemate (rac-DFL) and its R (S)-enantiomers in rat plasma, tissues, urine and feces. A MALDI-MSI method was further used to visual research on tissue distribution after oral administration of the three analytes. Toxicokinetic study showed that both (R)-enantiomers of dufulin ((R)-DFL) and (S)-enantiomers of dufulin ((S)-DFL) had a faster ability to reach Cmax than that of rac-DFL...
May 21, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29782163/stoichio-kinetic-modeling-of-fenton-chemistry-in-a-meat-mimetic-aqueous-phase-medium
#16
Khaled Oueslati, Aurelie Promeyrat, Philippe Gatellier, Jean-Dominique Daudin, Alain Kondjoyan
Fenton reaction kinetics, which involved an Fe(II)/Fe(III) oxidative redox cycle, were studied in a liquid medium that mimics meat physicochemical conditions. Muscle antioxidants (enzymes, peptides and vitamins) were added one by one in the medium to determine their respective effects on formation of superoxide and hydroxyl radicals. A stoichio-kinetic mathematical model was used to predict the formation of these radicals. The difference between experimental and predicted results was mainly due to iron reactivity, which had to be taken into account in the model, and to uncertainties on some of the rate constant values introduced in the model...
May 21, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29782162/water-and-fertilizer-integrated-hydrogel-derived-from-the-polymerization-of-acrylic-acid-and-urea-as-a-slow-release-n-fertilizer-and-water-retention-in-agriculture
#17
Dongdong Cheng, Yan Liu, Guiting Yang, Aiping Zhang
To reduce the preparation cost of superabsorbent and improve the N release rate at the same time, a novel low cost superabsorbent (SA) with the function of N slow release was prepared by chemical synthesis with neutralized acrylic acid (AA), urea, potassium persulfate (KPS) and N,N'-methylenebisacrylamide (MBA). The influence order of influence factors on water absorbency property was determined by orthogonal L18(3)7 experiment. Based on the optimization results of orthogonal experiment, the effects of single factor on the water absorption were studied, and the highest water absorbency (909 g/g) was obtained on the conditions: 1...
May 21, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29781618/field-detection-of-citrus-huanglongbing-associated-with-candidatus-liberibacter-asiaticus-by-recombinese-polymerase-amplification-within-15-min
#18
Wenjuan Qian, Ying Lu, Youqing Meng, Zunzhong Ye, Liu Wang, Rui Wang, Qiqi Zheng, Jian Wu
Candidatus Liberibacter asiaticus(Las)is the most prevalent bacterium associated with Huanglongbing which is one of the most destructive diseases of citrus. In this paper, an extremely rapid and simple method for field detection of Las from leaf samples based on recombinase polymerase amplification (RPA) is developed. Three RPA primer pairs were designed and evaluated. RPA amplification was optimized so that it could be accomplished within 10 min. In combination with DNA crude extraction by 50-fold diluting after 1 min of grinding in 0...
May 21, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29781612/the-role-of-melatonin-in-affecting-cell-wall-disassembly-and-chilling-tolerance-in-cold-stored-peach-fruit
#19
Shifeng Cao, Kun Bian, Liyu Shi, Hsiao-Hang Chung, Wei Chen, Zhenfeng Yang
Melatonin reportedly increased chilling tolerance in postharvest peach fruit during cold storage but information on its effect on cell wall disassembly in chilling injured peaches is limited. In this study, we investigated the role of cell wall depolymerization in chilling tolerance induction in melatonin-treated peaches. Treatment with melatonin at 100 µM alleviated chilling symptom (mealiness) characterized by decrease in fruit firmness and increase in juice extractability in treated peaches during storage...
May 21, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29781609/enhancement-and-analysis-of-human-anti-aflatoxin-b1-afb1-scfv-antibody-ligand-interaction-using-chain-shuffling
#20
Kuntalee Rangnoi, Kiattawee Choowongkomon, Richard O'Kennedy, Florian Rüker, Montarop Yamabhai
A human anti-aflatoxin B1 (AFB1) scFv antibody (yAFB1-c3), selected from a naïve human phage-displayed scFv library, was used as a template for improving and analysis of antibody-ligand interactions using the chain-shuffling technique. The variable heavy and variable light (VH/VL) shuffled library was constructed from the VH of 25 pre-selected clones recombined with the VL of yAFB1-c3 and vice versa. Affinity selection from these library demonstrated that the VH domain played an important role in the binding of scFv to free AFB1...
May 21, 2018: Journal of Agricultural and Food Chemistry
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