CHEMICAL ENGINEERING JOURNAL
·
2015
·
IF 4.321
Feize Li,Dongmei Li,Xiaolong Li,Jiali Liao,Shoujian Li,Jijun Yang,Yuanyou Yang,Jun Tang,Ning Liu
Saccharomyces cerevisiae , a typical industrial microorganism , was employed as a precursor to directly synthesize carbon microspheres. After a low temperature hydrothermal treatment (180 °C, 12 h), the microbial cells were successively transferred to carbon microspheres that had a diameter of 3–5 μm. The Hummers method was used to chemically modify the hydrothermal carbon materials to obtain functional materials for uranium removal. The characterizations and analysis showed that the morphology of the hydrothermal carbon was partially destroyed after functionalized activation, and abundant oxygen-containing groups were introduced onto the material surface. The results of the sorption behavior showed that the uranium (U) sorption capacity of the modified sorbent reached up to 183.4 mg g −1 , which was an improvement of approximately 4.6 times relative to the raw carbon materials. The thermodynamic and kinetic parameters demonstrated the removal process to be spontaneous, endothermic and pseudo-second-order chemisorption. The selective sorption of U(VI) from the simulated nuclear effluent at different pH values suggested that the sorbent displayed a desirable selectivity for the U(VI) ions over the other 11 competitive cations.
研究领域:
环境科学
·
微生物学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
·
2017
·Vol. 33
·期 2
·161-167
·
IF 3.379
Huimin Yu,Chengbin Zheng,Xiaoming Jiang,Xi Wu,Xiandeng Hou
Sulfur dioxide (SO2) is used as a universal additive to wine due to its excellent antioxidative, antimicrobic, and anti-brown characteristics and also because it is the product of natural fermentation of grapes. The concentration of SO2 in wine is strictly regulated since SO2 at high concentrations can damage tissues, organs, and various systems of human beings. In this study, an atomic fluorescence spectrometer (AFS) was used for the determination of SO2 by measuring its molecular fluorescence signal excited by a zinc hollow cathode lamp (Zn HCL, 213.8 nm) under simple and mild conditions without igniting the atomizer. The instrumental settings were first optimized by detecting gaseous SO2 prepared in advance. Under the optimal conditions, the instrumental limit of detection (LOD) for SO2 was found to be 0.17 μg, and the relative standard deviation (RSD) of 200 μg SO2 was 1.3%. The method was developed for determining the total SO2 in wine samples extracted by sodium hydroxide and generated in the form using sulfuric acid. The LOD of 0.79 μg mL−1 for this method was achieved for the total SO2 analysis of wine samples with a 5.2% RSD at a concentration level of 30 μg mL−1. The advantages of this method are simplicity, high throughput, less interference, relatively low cost, and less chemical consumption.
研究领域:
食品科学
·
分析化学
✓ 已验证
DOI
高影响因子
JOURNAL OF FOOD QUALITY
·
2021
·
IF 2.45
Wenliang Ma,Xiao Ni,Ying Guo,Yu Zhang,Chaojie Zhu,Yinping Li,Chi Shen,Biao Yuan,Xiao Xu
A functional Chinese fermented glutinous rice has been developed with the supplementation of Fu brick tea (CRW-FBT). In this study, we aimed to evaluate its effect on the growth of potential probiotic strains in the Lactobacillus, Streptococcus, and Weissella genus, compared with traditional Chinese fermented glutinous rice (CRW). The growth profiles of lactic acid bacteria were analyzed based on fermentations in vitro, and the optical densities were recorded at 600 nm during the whole fermentation. Growth curve, maximum OD600 nm, and growth rate were measured and compared among samples with different ratios of CRW-FBT and CRW addition. Through the multiple analysis of growth parameters, we found that all the tested strains obtained better growth results when CRW-FBT was supplemented to the media, compared with the CRW and basic media. The bacterial growth was promoted by exhibiting the shortened lag time, prolonged logarithmic phase and stationary phase, and increased growth rate and cell density, as well as the better performance after 24 h and 48 h fermentation. Besides, short-chain fatty acids and organic acids in CRW-FBT were founded. Our work demonstrated the positive effect of Fu brick tea supplemented in the CRW and illustrated its beneficial role in the food fermentation industry for the purpose of microorganism enrichment and the improvement of microbial metabolism.
研究领域:
食品科学
·
微生物学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF FOOD PROPERTIES
·
2017
·
IF 1.427
Meican Niu,Jun Huang,Yao Jin,Chongde Wu,Rongqing Zhou
The effect of oak matrix (medium toast barrel, medium toast shavings, non-toast chips, light toast chips, medium toast chips, and heavy toast chips) on the volatiles and antioxidant activity in Goji wine, a novel functional but aroma lackluster wine, were investigated. Results showed that the oak matrix used for Goji wine during aging improved its volatile profile and enhanced its antioxidant activity, depending on the toast degree and particularly the type of oak matrix. With regard to the volatiles of Goji wine, the oak shavings sample was the most efficient for the esters formation and the release of oak-related compounds. The analysis of odour activity values of volatiles in Goji wine also showed that the flavour of woody, vanilla, and clove was the highest in the oak shavings sample, which were related to the compounds such as cis- and trans-whisky lactone, vanillin, eugenol, isoeugenol, and 4-vinylguaiacol. According to the sensory analysis, the oak shavings samples had the highest score in olfactory and gustative. In addition, results of the effect of oak matrix on antioxidant activity of Goji wine indicated that Goji wine treated with oak shavings exhibited the highest antioxidant activity thanks to the high content of phenols (5.47 g/L GAE) and flavonoids (0.36 g/L).
研究领域:
食品科学
·
植物学
✓ 已验证
DOI
高影响因子
JOURNAL OF FOOD AND DRUG ANALYSIS
·
2015
·
IF 0.615
Weidong Bai,Xiaodi Fang,Wenhong Zhao,Shiqi Huang,Hongkang Zhang,Min Qian
This article presents a precolumn derivatization procedure with 1-phenyl-3-methyl-5-pyrazolone (PMP) reagent to detect oligosaccharides and monosaccharides in Hakka rice wine. The subsequent separation of the derivatized glucose–PMP also was performed using a mobile phase consisting of the molar ratio of acetonitrile to ammonium acetate buffer (0.1M) of 22:78 at a flow rate of 1.0 mL/min with the column temperature of 35°C, and the pH of ammonium acetate buffer at 5.5. The optimum derivation conditions were as follows: reaction temperature, 70°C; reaction time, 30 minutes; molar ratio of PMP to glucose, 10:1 (v/v); molar ratio of sodium hydroxide to glucose, 3:1 (v/v). The recovery rates were between 93.13% and 102.08% with relative standard deviation of 0.96–2.48%. The established method provides sufficient sensitivity with values of limit of detection of 0.09–0.26 mg/L and limit of quantification of 0.27–0.87 mg/L for determination of oligosaccharides and monosaccharides.
研究领域:
食品科学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
Fermentation-Basel
·
2024
·Vol. 10
·期 4
·211
·
IF 3.3
Qiu Tao,Guocheng Du,Jian Chen,Juan Zhang,Zheng Peng
Patchoulol is a natural sesquiterpene alcohol with extensive applications in cosmetics and pharmaceuticals. In this study, we first constructed the synthesis pathway of patchoulol inSaccharomyces cerevisiaeby expressing the patchoulol synthasePTSgene using the strong promoterGAL1. Afterward, the metabolic flux of the precursor was enhanced by strengthening the mevalonate pathway and balancing the precursor competition pathway, resulting in a 32.74-fold increase in patchoulol production. Subsequently, the supply of acetyl-CoA in yeast was increased by modifying transcriptional regulators and modulating the acetyl-CoA pathway, and the titer of patchoulol reached 155.94 mg/L. Finally, optimization of the fermentation conditions resulted in a titer of 195.96 mg/L in the shake flasks. Further, batch-fed fermentation in a 5 L bioreactor yielded 1.95 g/L. This work accelerated the development of a microbial cell factory for the production of patchoulol.
研究领域:
生物化学
·
代谢工程
·
合成生物学
✓ 已验证
DOI
高影响因子
Fermentation-Basel
·
2022
·Vol. 8
·期 6
·266
·
IF 5.123
Jing Zou,Yinan Ge,Yue Zhang,Min Ding,Kuo Li,Yinglan Lin,Xuedong Chang,Fei Cao,Yunkai Qian
Traditional glutinous rice wine (TGRW) has been fermented in China for over 9000 years. Recently, an innovative regional variation of TGRW, chestnut rice wine, banli mijiu (BLMJ), was developed by adding Chinese chestnut (Castanea mollissimaBlume) into the fermentation brew. The objective of this study was to characterize the effects of chestnut on the nutritional, aromatic, and antioxidant properties of TGRW. To compare the aromatic sensory profiles between TGRW and BLMJ, the free amino acids and ethyl carbamate, phenolic, and flavonoid contents were determined. In addition, the antioxidant properties, including reducing power, metal chelation, and free radical scavenging activities, were also compared. A total of 98 distinct flavor components were identified in BLMJ, among which 38 were detected by sniffing instrument, compared to 77 distinct flavor components in TGRW. BLMJ thus contains a wider range of flavor components, but similar alcohol, acid and reducing sugar profiles compared with TGRW. Twenty-five free amino acids were detected in both wines, with lower contents of each in BLMJ compared with TGRW. BLMJ also exhibited stronger antioxidant properties than TGRW. The findings of this study suggest that chestnut can increase the diversity of aromatic components and improve antioxidant qualities of traditional rice wine.Keywords:chestnut;rice wine;amino acid;antioxidant activity;phenols;sensory components
研究领域:
食品科学
·
营养学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF DAIRY TECHNOLOGY
·
2020
·Vol. 73
·期 3
·552-562
·
IF 1.636
Liang Wang,Enyan Gao,Man Hu,Qiang He,Yuting He,Xiaoyan Zheng
Milk beer is a new type of dairy beverage in China and increasingly popular with consumers. The strain FXJ1 isolated in our laboratory was an excellent strain for the production of milk beer with alcohol content of 0.48%. Our research verified that the strain FXJ1 was superior to the commercial strain MJ for milk beer production and got the optimal medium formula (67.37 g/L sucrose, 29.7 g/L yeast extract, 15.61 g/L corn steep liquor, 4.13 g/L KH 2 PO 4 and 0.3 g/L MgSO 4 ) which allowed the biomass production of strain FXJ1 to achieve 8.88 ± 0.08 g/L and increase 2.94-fold as compared with yeast extract peptone dextrose base medium.
研究领域:
食品科学
·
微生物学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Cong Chen,Ganhua Qiu,Ting Wang,Ziqiang Zheng,Mengtian Huang,Benxia Li
Photocatalytic selective oxidation of alcohols into high value-added carbonyl compounds accompanied by producing hydrogen peroxide (H 2 O 2 ) is undoubtedly a more efficient solar energy conversion strategy with high atom economy. Herein, we have developed an efficient photocatalyst of bismuth-molybdate (Bi 2 MoO 6 ) hierarchical hollow microspheres with tunable surface oxygen vacancies (OVs) for promoting the photocatalytic selective alcohol oxidation with H 2 O 2 production. The effect of surface OVs on the photocatalytic efficiency is studied systematically by comparing the performance of different photocatalysts. The benzaldehyde and H 2 O 2 production rates over the OV-rich Bi 2 MoO 6 photocatalyst reach up to 1310 and 67.2 μmol g −1 h −1 , respectively, which are 2.3 and 4.0 times those generated from the OV-poor Bi 2 MoO 6 hollow microspheres. The roles of various active radicals in the photocatalytic reaction are probed by a series of controlled experiments and in situ ESR measurements, revealing that both superoxide radical (• O 2 - ) and carbon-centered radical are the key active intermediates. The introduction of surface OVs on Bi 2 MoO 6 hollow microspheres accelerates the separation and transfer of photo-generated charge carriers as well as enhances the adsorption and activation of reactant molecules, thereby greatly promoting the photocatalytic selective oxidation of alcohols along with H 2 O 2 production. This work not only demonstrates a facile strategy for the preparation of high-efficiency photocatalysts by simultaneous modulations of morphology and surface defects , but also offers insight into developing the dual-functional photocatalytic reactions for the full utilizations of photoinduced electrons and holes.
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2025
·
IF 4.6
Haiguang Tan,Xin Zhang,Kaixuan Zhu,Shengfan Chen,Yangyang Sun,Meng Bian,Huan Zhang,Lijuan Ma,Qianqian Li,Lin Yuan,Liping Du
Rapid and accurate evaluation of newly distilled base liquor is essential for ensuring product consistency and quality. To address this challenge, a multi-platform analytical and chemometric approach to assess the quality of different grades Qingxiangxing crude Baijiu (QXCBJ) produced continuously was employing. Volatile organic components of QXCBJ were profiled using gas chromatography-flame ionization detector/mass spectrometry (GC-FID/GC-MS), and non-volatile organic components (NVOCs) were characterized using liquid chromatography-high resolution mass spectrometry (LC-HRMS). In total, 136 VOCs and 270 NVOCs were identified, and 36 of them were screened as potential quality markers. In the GC-MS analysis, isoamyl lactate, ethyl phenylacetate, 4-ethyl-2-methoxyphenol, ethyl cinnamate, and 2-methoxy-4-vinylphenol showed significant differences among different QXCBJ samples, contributing to sample differentiation. Metabolomic profiling via LC-HRMS revealed differential accumulation of gustatory components (malic acid, vanillin acid, mannitol, betaine, azelaic acid, and lysine) across QXCBJ samples. Multifactor analysis (MFA) demonstrated that the integrated multi-platform strategy significantly improved sample discrimination compared to single-method approaches. This comprehensive methodology not only establishes a scientific basis for the quality control of Qingxiangxing Baijiu (QXBJ) but also demonstrates the potential of this multi-platform chemometric strategy for evaluating other Chinese spirits with similar complexity.
✓ 已验证
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2021
·
IF 5.455
Daliang Guo,Dinggen Hu,Zhongyu Yan,Kangshuai Yuan,Lizheng Sha,Huifang Zhao,Jianbin Chen,Bei Liu
In order to study the property of lignin-based porous carbon activated by potassium tartrate, the effects of activator types, activator/lignin mass ratio and activation temperature on the surface morphology , specific surface area and pore size distribution of alkali lignin based porous carbon materials were systematically investigated. Meanwhile, the methyl orange adsorption capacity and adsorption kinetics of the lignin-based porous carbon were also evaluated. The N 2 adsorption-desorption experiment results showed that the specific surface area value of lignin-based porous carbon materials activated by potassium tartrate (APC-J), KOH (APC-K), and NaOH (APC-Na) are 947, 1113 and 762 m 2 /g, respectively. Meanwhile, APC-J has a special microporous structure, while the pore structures of APC-K and APC-Na are mainly mesopores . The best specific surface area of lignin-based porous carbon materials was 1911 m 2 /g obtaining from APC-J-2-8 sample (mass ratio 2:1, activation temperature 800 °C). The adsorption experiment of methyl orange (MO) showed that the adsorption kinetics of APC-J-2-8 conformed to the quasi-second-order kinetic model , mainly chemical adsorption . The isothermal adsorption process conforms to the Langmuir adsorption isothermal adsorption model, which is a single molecular layer adsorption, and the maximum adsorption amounts are 526.31 mg/g.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
ACS Applied Bio Materials
·
2022
·
IF 0
Peixin Niu,Jiaojiao Liu,Feifei Xu,Lei Yang,Yuhan Li,Ailing Sun,Liuhe Wei,Xingjiang Liu,Xiangzhi Song
Reactive oxygen species (ROS) are an important component for maintaining normal physiological activities in organisms, and abnormal changes in their level are often accompanied by many diseases. As the two most representative components of ROS, HClO and H2O2 play vital roles in many physiological and pathological processes and are interdependent and mutually transformable. Although there is a lot of work that has specifically detected HClO or H2O2, there are few reports on the simultaneous differential detection of HClO and H2O2. Here, we report a ratio-based fluorescent probe capable of simultaneously distinguishing HClO and H2O2 based on making the best use of the untapped potential of coumarin derivatives. This probe was triumphantly put into use in the discriminative identification of HClO and H2O2 in aqueous media with high sensitivity and selectivity, and the probe was appropriate in a wide pH range. Furthermore, the imaging experiment for HClO and H2O2 in cells and zebrafish was eventually proven to be feasible. Importantly, this probe was qualified for monitoring the variation of HClO and H2O2 levels in organisms with alcoholic liver injury.
研究领域:
生物化学
·
医学
·
分析化学
✓ 已验证
DOI
PubMed
危险品化学品经营许可证（带存储）