8 results on '"Zhao, Mengyao"'
Search Results
2. Additional file 1 of Effect of chitooligosaccharides with a specific degree of polymerization on multiple targets in T2DM mice
- Author
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You, Jiangshan, Zhao, Mengyao, Chen, Shumin, Jiang, Lihua, Gao, Shuhong, Yin, Hao, and Zhao, Liming
- Abstract
Additional file 1: Table S1. Primer sequences used in qPCR.
- Published
- 2022
- Full Text
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3. Effect of glycine on reaction of cysteine-xylose: Insights on initial Maillard stage intermediates to develop meat flavor
- Author
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Changchun Cao, Jianchun Xie, Li Hou, Qunfei Xiao, Mengdie Fan, Jian Zhao, Zhao Mengyao, and Feng Chen
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Meat ,Food Handling ,Kinetics ,Thiazolidine ,Glycine ,Xylose ,Gas Chromatography-Mass Spectrometry ,Reaction rate ,symbols.namesake ,chemistry.chemical_compound ,0404 agricultural biotechnology ,Browning ,Organic chemistry ,Cysteine ,Chromatography, High Pressure Liquid ,Chemistry ,04 agricultural and veterinary sciences ,040401 food science ,Maillard Reaction ,Flavoring Agents ,Maillard reaction ,Taste ,symbols ,Food Science - Abstract
The meat-like reactions of l-cysteine and d-(+)-xylose with or without glycine were investigated. LC-MS was used to quantitatively determine the initial stage intermediates including 2-threityl-thiazolidine-4-carboxylic acid, Cys-Amadori, and Gly-Amadori in the reaction mixtures. The results showed that the addition of glycine was only in positive correlation with the browning feature of cyseine-xylose reaction. When excessive glycine was added, a high browning rate would be achieved, but it did not benefit the formation of meaty compounds. For a complex meat-like reaction system containing cysteine, reducing sugars and glycine, to overcome the low rate of reaction, and particularly, to minimize the inhibitive effect of cysteine in the generation of meaty flavors, selection of an appropriate ratio between cysteine and glycine is important in an effort to make amounts of the intermediates of Cys-Amadori and Gly-Amadori approximately equally consist in the reaction mixture.
- Published
- 2017
4. Volatile flavor constituents in the pork broth of black-pig
- Author
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Li Hou, Jian Zhao, Jingjing Liang, Jie Cheng, Zhao Mengyao, Jianchun Xie, Meng Wang, and Shi Wang
- Subjects
China ,Swine ,Nonanal ,01 natural sciences ,Gas Chromatography-Mass Spectrometry ,Analytical Chemistry ,chemistry.chemical_compound ,0404 agricultural biotechnology ,Tandem Mass Spectrometry ,Animals ,Food science ,Flavor ,Aroma ,chemistry.chemical_classification ,Volatile Organic Compounds ,Chromatography ,biology ,010401 analytical chemistry ,Selected reaction monitoring ,food and beverages ,04 agricultural and veterinary sciences ,General Medicine ,biology.organism_classification ,040401 food science ,0104 chemical sciences ,Dilution ,Smell ,Solvent ,Red Meat ,chemistry ,Taste ,Volatile flavor ,Food Science ,Polyunsaturated fatty acid - Abstract
Pork of black-pig in China is well known for its quality and preferred by consumers. However, there is a lack of research on its flavors. By solvent assisted flavor evaporation combined with GC-MS, 104 volatile compounds in the stewed pork broth of black-pig were identified with the dominant amounts of fatty acids, alcohols, and esters. By aroma extract dilution analysis-GC-O method, 27 odor-active compounds were characterized, including 2-methyl-3-furanthiol, 3-(methylthio)propanal, 2-furfurylthiol, γ-decalactone, nonanal, (E)-2-nonenal, and (E,E)-2,4-decadienal that had high FD factors. Compared to the common white-pig, the aroma compounds in both pork broths were almost the same, but the aroma profile of potent odorants for the black-pig pork broth showed less fatty and more roasted notes, which were partially attributed to the higher monounsaturated fatty acids and lower polyunsaturated fatty acids in meat. With aid of authentic chemicals and selected reaction monitoring mode of GC-MS/MS, 19 aroma compounds were quantitated.
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- 2017
5. HALS intercalated layered double hydroxides as an efficient light stabilizer for polypropylene
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Yongjun Feng, Zhao Mengyao, Pinggui Tang, Dianqing Li, Ma Ruoyu, and Yufan Mo
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Polypropylene ,Materials science ,Thermal decomposition ,Intercalation (chemistry) ,Layered double hydroxides ,020101 civil engineering ,Geology ,02 engineering and technology ,engineering.material ,021001 nanoscience & nanotechnology ,0201 civil engineering ,chemistry.chemical_compound ,chemistry ,Chemical engineering ,Geochemistry and Petrology ,engineering ,Thermal stability ,0210 nano-technology ,Photodegradation ,Hybrid material ,Stabilizer (chemistry) - Abstract
The thermal stability and migration resistance of light stabilizers are vital for their applications in plastics. Herein, a novel nano organic–inorganic hybrid light stabilizer with high thermal stability and low solubility was prepared by intercalating a synthesized hindered amine light stabilizer (HALS) with UV absorption capability into the interlayer galleries of MgAl layered double hydroxides (LDH) through co-precipitation method. The prepared HALS–LDH was characterized by XRD, FT–IR, SEM, TG–DTA and UV–vis, and was incorporated into the matrix of polypropylene (PP) via solvent casting method to prepare LDH/PP composite for light stability test. It was found that the synthesized HALS was successfully intercalated into the interlayer galleries of MgAl–LDH, forming an organic–inorganic hybrid material HALS–LDH with a mean size of 63 nm. HALS–LDH nanosheets were evenly dispersed in the matrix of PP, and the addition of HALS–LDH can retard the thermal decomposition of PP. Moreover, the incorporation of HALS–LDH significantly improved the light stability of PP and reduced the photo degradation of PP by about 83.2%. Therefore, the prepared novel HALS–LDH has potential application in the field of PP as an efficient and promising light stabilizer.
- Published
- 2019
6. Correction to: Contrasting transcriptional responses of PYR1/PYL/RCAR ABA receptors to ABA or dehydration stress between maize seedling leaves and roots
- Author
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Fan, Wenqiang, Zhao, Mengyao, Li, Suxin, Bai, Xue, Li, Jia, Meng, Haowei, and Mu, Zixin
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Time Factors ,Dehydration ,Dose-Response Relationship, Drug ,Reverse Transcriptase Polymerase Chain Reaction ,Gene Expression Profiling ,Arabidopsis ,Correction ,Receptors, Cell Surface ,Plant Science ,Plant Roots ,Zea mays ,Polyethylene Glycols ,Up-Regulation ,lcsh:QK1-989 ,Plant Leaves ,Plant Growth Regulators ,Gene Expression Regulation, Plant ,Seedlings ,lcsh:Botany ,Phylogeny ,Abscisic Acid ,Plant Proteins - Abstract
The different actions of abscisic acid (ABA) in the aboveground and belowground parts of plants suggest the existence of a distinct perception mechanism between these organs. Although characterization of the soluble ABA receptors PYR1/PYL/RCAR as well as core signaling components has greatly advanced our understanding of ABA perception, signal transduction, and responses, the environment-dependent organ-specific sensitivity of plants to ABA is less well understood.By performing real-time quantitative PCR assays, we comprehensively compared transcriptional differences of core ABA signaling components in response to ABA or osmotic/dehydration stress between maize (Zea mays L.) roots and leaves. Our results demonstrated up-regulation of the transcript levels of ZmPYLs homologous to dimeric-type Arabidopsis ABA receptors by ABA in maize primary roots, whereas those of ZmPYLs homologous to monomeric-type Arabidopsis ABA receptors were down-regulated. However, this trend was reversed in the leaves of plants treated with ABA via the root medium. Although the mRNA levels of ZmPYL1-3 increased significantly in roots subjected to polyethylene glycol (PEG)-induced osmotic stress, ZmPYL4-11 transcripts were either maintained at a stable level or increased only slightly. In detached leaves subjected to dehydration, the transcripts of ZmPYL1-3 together with ZmPYL5, ZmPYL6, ZmPYL10 and ZmPYL11 were decreased, whereas those of ZmPYL4, ZmPYL7 and ZmPYL8 were significantly increased. Our results also showed that all of the evaluated transcripts of PP2Cs and SnRK2 were quickly up-regulated in roots by ABA or osmotic stress; conversely they were either up-regulated or maintained at a constant level in leaves, depending on the isoforms within each family.There is a distinct profile of PYR/PYL/RCAR ABA receptor gene expression between maize roots and leaves, suggesting that monomeric-type ABA receptors are mainly involved in the transmission of ABA signals in roots but that dimeric-type ABA receptors primarily carry out this function in leaves. Given that ZmPYL1 and ZmPYL4 exhibit similar transcript abundance under normal conditions, our findings may represent a novel mechanism for species-specific regulation of PYR/PYL/RCAR ABA receptor gene expression. A difference in the preference for core signaling components in the presence of exogenous ABA versus stress-induced endogenous ABA was observed in both leaves and roots. It appears that core ABA signaling components perform their osmotic/dehydration stress response functions in a stress intensity-, duration-, species-, organ-, and isoform-specific manner, leading to plasticity in response to adverse conditions and, thus, acclimation to life on land. These results deepen our understanding of the diverse biological effects of ABA between plant leaves and roots in response to abiotic stress at the stimulus-perception level.
- Published
- 2018
7. Roles of different initial Maillard intermediates and pathways in meat flavor formation for cysteine-xylose-glycine model reaction systems
- Author
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Jian Zhao, Li Hou, Feng Chen, Jingjing Liang, Jianchun Xie, Zhao Mengyao, Mengdie Fan, and Qunfei Xiao
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Meat ,Food Handling ,Thiazolidine ,Glycine ,Xylose ,01 natural sciences ,Analytical Chemistry ,chemistry.chemical_compound ,symbols.namesake ,0404 agricultural biotechnology ,Amadori rearrangement ,Organic chemistry ,Reactivity (chemistry) ,Cysteine ,integumentary system ,Thiazolidines ,010401 analytical chemistry ,food and beverages ,04 agricultural and veterinary sciences ,General Medicine ,040401 food science ,0104 chemical sciences ,Maillard Reaction ,Maillard reaction ,chemistry ,symbols ,Food Science - Abstract
To explore initial Maillard reaction pathways and mechanisms for maximal formation of meaty flavors in heated cysteine-xylose-glycine systems, model reactions with synthesized initial Maillard intermediates, Gly-Amadori, TTCA (2-threityl-thiazolidine-4-carboxylic acids) and Cys-Amadori, were investigated. Relative relativities were characterized by spectrophotometrically monitoring the development of colorless degradation intermediates and browning reaction products. Aroma compounds formed were determined by solid-phase microextraction combined with GC–MS and GC-olfactometry. Gly-Amadori showed the fastest reaction followed by Cys-Amadori then TTCA. Free glycine accelerated reaction of TTCA, whereas cysteine inhibited that of Gly-Amadori due to association forming relatively stable thiazolidines. Cys-Amadori/Gly had the highest reactivity in development of both meaty flavors and brown products. TTCA/Gly favored yielding meaty flavors, whereas Gly-Amadori/Cys favored generation of brown products. Conclusively, initial formation of TTCA and pathway involving TTCA with glycine were more applicable to efficiently produce processed-meat flavorings in a cysteine-xylose-glycine system.
- Published
- 2016
8. Aroma Constituents in Shanxi Aged Vinegar before and after Aging
- Author
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Jian Zhao, Jianchun Xie, Jingjing Liang, Zhao Mengyao, Shi Wang, Jie Cheng, Li Hou, and Sun Baoguo
- Subjects
Time Factors ,Diacetyl ,Gas Chromatography-Mass Spectrometry ,symbols.namesake ,0404 agricultural biotechnology ,Tandem Mass Spectrometry ,Chinese traditional ,Furaldehyde ,Food science ,Flavor ,Aroma ,Acetic Acid ,Chromatography ,biology ,Chemistry ,Selected reaction monitoring ,food and beverages ,04 agricultural and veterinary sciences ,General Chemistry ,biology.organism_classification ,040401 food science ,Maillard reaction ,Benzaldehydes ,Fermentation ,Odorants ,symbols ,General Agricultural and Biological Sciences ,Food Analysis - Abstract
Shanxi aged vinegar is one of the most famous Chinese traditional cereal vinegars produced by spontaneous solid-state fermentation. However, the aroma composition of Shanxi aged vinegar is still ambiguous. The Shanxi vinegars before and after aging were both analyzed by solvent-assisted flavor evaporation combined with gas chromatography-mass spectrometry (GC-MS) as well as gas chromatography-olfactometry (GC-O) in aroma extract dilution analysis. A total of 87 odor-active regions were found by GC-O, and 80 odor-active compounds were identified. By GC-MS/MS, in selected reaction monitoring mode, 30 important identifications were quantitated using authentic standards. In comparison, the aroma molecules for the vinegars before and after aging were almost the same; only their levels were altered, with mostly the esters and some compounds that produce pungent smells being lost and the levels of those from the Maillard reaction, especially the pyrazines (e.g., tetramethylpyrazine), being greatly increased. As for the aged vinegar, the compounds found to have high flavor dilution factors (128) were 3-(methylthio)propanal, vanillin, 2,3-butanedione, tetramethylpyrazine, 3-methylbutanoic acid, γ-nonalactone, guaiacol, 3-(methylthio)propyl acetate, dimethyl trisulfide, phenylacetaldehyde, 2-ethyl-6-methylpyrazine, 2-acetylpyrazine, 2,3-dimethylpyrazine, furfural, and 3-hydroxy-2-butanone. However, the aroma compounds found at high concentrations (25 μg/L) in the aged vinegar were acetic acid, followed by 2,3-butanedione, furfural, 3-hydroxy-2-butanone, tetramethylpyrazine, furfuryl alcohol, and 3-methylbutanoic acid.
- Published
- 2016
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