JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2015
·
IF 2.912
Xianchao Feng,Chenyi Li,Niamat Ullah,Robert M. Hackman,Lin Chen,Guanghong Zhou
The stability of cured meat products is increased by the protection of its proteins from oxidation by sodium nitrite (NaNO2) during processing. This study investigated the effects of NaNO2 (0, 50, 100, 200, and 400 mg/kg) on the physiochemical and structural characteristics of myofibrillar protein (MP) in raw and cooked ham. The NaNO2 showed a dose-dependent antioxidant effect, by inhibiting carbonyl formation, dityrosine formation, and denaturation of MP, and a nitrosative effect, through the formation of 3-Nitrotyrosine (3-NT). The 3-NT content within MP of raw ham had distinct negative correlations with sulfhydryl content and surface hydrophobicity. The 3-NT content within MP of cooked ham had significantly negative correlations with carbonyl, sulfhydryl content and turbidity and had significantly positive correlations with disulfide content. These results indicated that 3-NT may be a potential marker for protein oxidation in raw and cooked cured meat products.
研究领域:
食品科学
·
生物化学
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DOI
高影响因子
PLANT CELL AND ENVIRONMENT
·
2018
·Vol. 42
·期 4
·1352-1367
·
IF 5.415
Tingting Jing,Na Zhang,Ting Gao,Mingyue Zhao,Jieyang Jin,Yongxian Chen,Miaojing Xu,Xiaochun Wan,Wilfried Schwab,Chuankui Song
Plants emit a variety of volatiles in response to herbivore attack, and (Z)-3-hexenol and its glycosides have been shown to function as defence compounds. Although the ability to incorporate and convert (Z)-3-hexenol to glycosides is widely conserved in plants, the enzymes responsible for the glycosylation of (Z)-3-hexenol remained unknown until today. In this study, uridine-diphosphate-dependent glycosyltransferase ( UGT ) candidate genes were selected by correlation analysis and their response to airborne (Z)-3-hexenol, which has been shown to be taken up by the tea plant. The allelic proteins UGT85A53-1 and UGT85A53-2 showed the highest activity towards (Z)-3-hexenol and are distinct from UGT85A53-3, which displayed a similar catalytic efficiency for (Z)-3-hexenol and nerol. A single amino acid exchange E59D enhanced the activity towards (Z)-3-hexenol, whereas a L445M mutation reduced the catalytic activity towards all substrates tested. Transient overexpression of CsUGT85A53-1 in tobacco significantly increased the level of (Z)-3-hexenyl glucoside. The functional characterization of CsUGT85A53 as a (Z)-3-hexenol UGT not only provides the foundation for the biotechnological production of (Z)-3-hexenyl glucoside but also delivers insights for the development of novel insect pest control strategies in tea plant and might be generally applicable to other plants.
研究领域:
植物学
·
分子生物学
·
昆虫学
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DOI
PubMed
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2017
·
IF 3.154
Mingshun Chen,Shujuan Yu
Grape seed proanthocyanidins, composed of flavan-3-ols of different degrees of polymerization, are natural food antioxidants. Flavan-3-ols in grape seed are usually polyhydroxy derivatives which exhibit hydrophilic character. Monomeric and oligomeric flavan-3-ols were modified structurally to improve their lipophilicity, expand their application in lipophilic media, and enhance their cellular absorption in the body. The esterification of the water-soluble flavan-3-ols was prepared by Lipozyme TL IM with lauric acid, and their enhanced lipophilicity was confirmed by a 1-octanol/water partition coefficient. The chemical structures of monomeric and oligomeric flavan-3-ol derivatives, identified by HPLC-MS-MS and 1H and 13C NMR, were 3′-O-lauroyl catechin, 3′-O-lauroyl epicatechin, 3′,5′-2-O-lauroyl epigallocatechin, 3′,3″,5″-3-O-lauroyl epicatechin gallate, 3′,3″-2-O-lauroyl procyanidin A2, 3′,3″-2-O-lauroyl procyanidin B1, and 3′,3″,3‴-3-O-lauroyl procyanidin C1. Flavan-3-ol derivatives exhibited the highest 1,1-diphenyl-2-picrylhydrazyl and 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) radical scavenging activities compared to that of parent flavan-3-ols, butylated hydroxytoluene and tert-butyl hydroquinone. The results suggest that flavan-3-ol derivatives may be used as potential lipophilic antioxidants in the food industry.
研究领域:
食品科学
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天然产物化学
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生物化学
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DOI
PubMed
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 4
·878
·
IF 4.6
Ruijia Hu,Weihao Li,Xi Zhou,Shunmin Yi,Xingfu Zheng,Qiufeng Mo,Wanyu Liu
A novel lignocellulose-based poly(butylene 3-propyladipate-co-furanoate) (PBApF) was synthesized from lignocellulose-derived 3-propyladipic acid (3PAA), 1,4-butanediol (BDO), and 2,5-furandicarboxylic acid (FDCA). The copolyesters were characterized by1H NMR, GPC, DSC, TGA, XRD, DMA, rotational rheology, tensile tests, and enzymatic degradation tests. They were random copolymers whose composition was well controlled, and the number-average sequence lengths of the copolyesters were around 1.35–4.33. By combining the results of tensile tests and DMA, the elongation at break of PBApF45(1865%) had a much greater value than that of PBAF45(1250%), i.e., the branching incorporated into the linear polymer increased the melt strength and conferred tension-hardening properties, which helped to enhance the elongation of the polymer. In addition, the influences of 3PAA content on enzymatic degradation were studied in terms of weight loss; when the content of 3PAA was 55 mol%, the copolyesters exhibited good biodegradability. Thus, depending on their composition, PBApFSmight find end applications as biodegradable elastomers or impact modifiers for other polymers.
研究领域:
材料科学
·
生物化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2020
·
IF 3.28
Weimin Dong,Yingjie Sun,Qian Yao,Lintao Liu,Qingbo Wang,Hang Wen,Jing Li,Xinguang Xu,Jiyang Wang,Robert I. Boughton
Single crystal Pr(BO 2 ) 3 with centimeter size was grown successfully by a flux method using 3Li 2 CO 3 -2H 3 BO 3 as a flux. The absorption spectrum , emission spectrum , and luminescence lifetime of the Pr(BO 2 ) 3 crystal were measured. The crystal has a relatively large absorption cross section and full widths at half maximum (FWHM), which is advantageous for energy absorption from a pumping source. The spectrum parameters were calculated based on Judd–Ofelt (J-O) theory, and the effective J-O parameters were determined to be: Ω 2 = 37.47 × 10 20 cm 2 , Ω 4 = 6.80 × 10 20 cm 2 , and Ω 6 = 1.05 × 10 20 cm 2 . Furthermore, the emission cross section for the 3 P 0 → 3 F 2 transition at 650 nm was calculated to be 13.6 × 10 −19 cm 2 . The fluorescence lifetime of the 3 P 0 level was obtained to be 4.5 ns. The Raman spectrum of the crystal was also analyzed in detail. Physical properties such as thermal and chemical stability, hardness, and cleavage properties were explored. The refractive index and electronic structure were calculated by the first-principles method.
研究领域:
材料科学
·
光学
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DOI
高影响因子
JOURNAL OF MEDICINAL CHEMISTRY
·
2019
·
IF 6.054
Xiaodong Dou,Huixia Huang,Yibo Li,Lan Jiang,Yanxing Wang,Hongwei Jin,Ning Jiao,Lihe Zhang,Liangren Zhang,Zhenming Liu
Alzheimer’s disease (AD) is one of the most challenging diseases around the world with no effective clinical treatment. Previous studies have suggested c-Jun N-terminal kinase 3 (JNK3) as an attractive therapeutic target for AD. Herein, we report 3-substituted indolin-2-one derivatives as the first isoform-selective JNK3 inhibitors by multistage screening. In this study, comparative structure-based virtual screening was performed, and J30-8 was identified with a half-maximal inhibitory concentration of 40 nM, which exhibited over 2500-fold isoform selectivity and marked kinome-wide selectivity. Further study indicated that 1 μM J30-8 exhibited neuroprotective activity in vitro so as to alleviate the spatial memory impairment in vivo through reducing plaque burden and inhibiting the phosphorylation of JNKs, Aβ precursor protein, and Tau protein. All of these indicated J30-8 as proved isoform-selective JNK3 inhibitors that might serve as a useful tool for further JNK3 studies with AD as well as for the development of JNK3 inhibitors for the potential treatment of neurodegenerative diseases.
研究领域:
神经科学
·
药理学
·
药物发现
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DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2024
·Vol. 35
·期 50
·505502
·
IF 2.9
Zhihua Zhao,Hepeng Zhang,Pu Chen,Guixin Jin,Lan Wu
Two-dimensional material (2D material) MXene has great application potential in gas sensors because of its excellent controllable performance and vast specific surface area. In this study, we used a straightforward in-situ electrostatic self-assembly technique to create Fe(OH)3/Ti3C2Tx nanocomposites, which were then used to fabricate gas sensors for ammonia detection at room temperature (25 °C). Several characterization methods were performed aimed at determining the surface appearance and construction of the nanocomposites, and the sensing characteristics and mechanism were also systematically examined. The findings demonstrate the effective incorporation of amorphous Fe(OH)3 nanoparticles on the surface of Ti3C2Tx. Additionally the nanocomposites of Fe(OH)3/Ti3C2Tx have considerably higher specific surface area than pure Ti3C2Tx, hence offering more active NH3 adsorption sites. The response of the sensor to 100 ppm NH3 was 48.6% at room temperature, which was 9.3 times more higher than that of pure Ti3C2Tx. The sensors also have the advantages of long-term stability (33 d), low NH3 detection limit (500 ppb), and rapid recovery time (85 s) and response times (78 s). It is anticipated that this work will be helpful for developing the new generation of wearable ammonia sensors at room temperature.
研究领域:
材料科学
·
传感器技术
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2012
·
IF 3.461
Bo Yang,Shubo Deng,Gang Yu,Yonghong Lu,Hong Zhang,Jianzhong Xiao,Gang Chen,Xiaobing Cheng,Lili Shi
Nanoscale Al particles with average diameter of about 100 nm were employed to prepare Pd/Al nanoparticles (NPs) by chemical displacement deposition. It was proved that Pd 2+ acidic deposition solution was superior to its alkaline deposition solution in terms of Pd loading rate on Al NPs. The Pd/Al NPs were characterized by ICP–OES, SEM, TEM, XRD, BET and then used to explore hydrodechlorination (HDC) performance of 3-chlorophenol (3-CP) in aqueous solution. Major factors affecting HDC efficiency were investigated including Al substrate sizes, pH, Pd loadings in Pd/Al NPs, dosage of Pd/Al NPs, and temperature. The optimal results indicated that nanoscale Pd/Al bimetallic particles were highly effective for 3-CP HDC. HDC efficiency was only about 30% in 50 min reaction with micron sizes of Pd/Al particles (100–400 mesh), whereas it increased to 99.7% within 30 min using Pd/Al NPs at 25 °C. Aqueous pH presented remarkable effect on HDC and pH 3–4 was the optimum range for HDC as pH varied from 2 to 11. Pd loadings and Pd/Al dosages were optimized for highly effective HDC as 1.16 wt.% and 2 g/L, respectively. In addition, higher HDC performance was obtained while reaction temperature arrived at 45 °C and 0.389 mM of 3-CP could be completely dechlorinated into phenol only within 10 min reaction.
研究领域:
环境科学
·
纳米技术
·
化学工程
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2014
·
IF 3.84
Wangyao Zhang,Yang Yang,Fenfen Li,Guosheng Song,Yong Shao,Ruizhuo Ouyang,Lina Xu,Weiwei Li,Yuqing Miao
A simple one-step method was successfully developed to prepare stable nanosized Ni(OH) 2 @Cr(OH) 3 hybrid particles by just adding NaOH to a mix solution containing Ni(NO 3 ) 2 and Cr(NO 3 ) 3 at room temperature. In contrast, under the exact same conditions, flocculent Ni(OH) 2 or Cr(OH) 3 precipitate was obtained after the addition of equivalent NaOH in a solution containing same amount of Ni(NO 3 ) 2 or Cr(NO 3 ) 3 as in the mix solution. The interaction between Ni(II) and Cr(III) ions was believed to make major contribution to the formation of stable Ni(OH) 2 @Cr(OH) 3 nanohybrid without aggregation to large-size particles. The prepared Ni(OH) 2 @Cr(OH) 3 hybrid nanoparticles were well characterized by the scanning electron microscopy (SEM), the transmission electron microscopy (TEM), X-ray diffraction (XRD), and electrochemical measurements with results showing uniform size, smooth surface, good monodispersibility, fast electron transfer rate as well as promising electrocatalytic properties toward glucose (Glu) and cysteine (Cys) oxidation. The presence of a small amount of Cr(OH) 3 in the composite not only improved the stability and monodispersibility of the Ni(OH) 2 @Cr(OH) 3 hybrid particles, decreased their size to nanoscale, but also exerted positive effect to the electrochemical properties of the obtained Ni(OH) 2 based nanomaterials like the electron transfer rate and the electrocatalytic activity. Satisfactory electrocatalytic performances of the Ni(OH) 2 @Cr(OH) 3 nanohybrid toward Glu and Cys oxidations were achieved, respectively, in certain concentration ranges with acceptable detection limits and correlation coefficients, suggesting the potential facilitation of electrocatalysis toward other small molecules by the newly prepared Ni(OH) 2 @Cr(OH) 3 nanohybrid.
研究领域:
生物电化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Junyan Zhang,Jiaqi Shen,Haomin Chu,Yingchun Xie,Zhenzhen Jiang,Daolin Gao,Tianlong Deng,Xiaoping Yu
With the rapid development of the new energy industry, the recovery or extraction of lithium from different resources is currently a global research hotspot. In this work, Li 3 V 2 (PO 4 ) 3 was used as the active component for electrochemical extraction of lithium from aqueous solutions. The results showed that although Li 3 V 2 (PO 4 ) 3 exhibited the reversible de-intercalation/intercalation of Li + , it suffered from severe irreversible dissolution loss in aqueous solutions. This problem was successfully solved by titanium doping. The experiments and DFT calculations showed that when the V(2)-site vanadium in Li 3 V 2 (PO 4 ) 3 was replaced by titanium, the resulting material exhibited superhigh cycle stability and lithium extraction rate. After ten cycles of de-intercalation/intercalation, the extraction capacity still reached 11.5 mg·g −1 , and the attenuation was within the error range. Particularly, because of the decrease of the band gap after doping, the electronic conductivity of the material was significantly improved, and the equilibrium time for lithium extraction was within only 5 min, which was more than 10 times faster than that of the conventional LiFePO 4 and Li 2 MnO 4 materials. This work provides a new solution for the green, efficient, and highly stable extraction of lithium from liquid lithium resources.
研究领域:
材料科学
·
电化学
·
新能源技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2024
·
IF 4
Jing Liang,Yu Ya,Dejiao Ning,Cuiwen Jiang,Yanli Wang,Liping Xie,Xiaochuan Huang,Tao Li,Li Tang,Feiyan Yan
Copper (II) (Cu 2+ ) and 3-nitropropionic acid (3-NPA) are harmful substances usually found in foods. Therefore, establishing rapid, sensitive, and accurate detection method for both of these substances is significant research work. A pyrene-based fluorescent sensor (PP) was synthesized to enable highly selective and sensitive simultaneous detection of Cu 2+ and 3-NPA in food samples. Initially, PP showed weak fluorescence because of the photo–induced electron transfer process (PET). Upon the presence of Cu 2+ , the emission of PP at 454 nm enhanced owing to the coordination between PP and Cu 2+ which hindered the PET. Additionally, under 365 nm UV irradiation, the color of the PP solution transitions from orange to bright blue, allowing for naked-eye detection. The sensor PP demonstrated high selectivity and sensitivity toward Cu 2+ compared to other competitive metal ions, with the detection limit was 0.036 μM, within a linear range of 0–20 μM. The binding stoichiometry between PP and Cu 2+ is determined to be 2:1 using the Job’s plot method, with a binding constant (K a ) of 7.2 ×10 3 M −1/2 . Furthermore, at lower pH (in the range 2.55–5.98), the emission of PP was also enhanced due to the protonation of PP which suppresses the PET process. Given its sensitive and linear response to acidic pH, PP exhibits excellent sensing performance for detecting 3-NPA, with a low detection limit of 0.32 μM, surpassing previously reported methods in terms of detection sensitivity.
研究领域:
分析化学
·
食品安全
·
生物传感
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产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 6
·期 6
·4329-4334
·
IF 3.84
Jikui Wang,Jiahong Guo,Pengxiang Si,Wanping Cai,Yuming Wang,Genhua Wu
An In(OH)3–PDMS sponge has been synthesized by covalent modification of PDA. The sponge can switch surface wettability reversibly between superhydrophobicity and superhydrophilicity when detecting ammonia. The water contact angle changes from 141.5° to 0° after storage in an ammonia atmosphere, which means an ammonia responsive surface wettability switch. The minimum NH3·H2O concentration that the In(OH)3–PDMS can detected is 5% in 2 h. This kind of quick and sensitive ammonia detector is promising simply by virtue of the surface wettability conversion.
研究领域:
材料科学
·
化学工程
·
环境监测
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）