Article
Chemistry, Multidisciplinary
Jinghui Yang, Yan Xia
Summary: The researchers developed a novel polymer system that undergoes extensive backbone degradation in response to mechanical stress, synthesized through ring-opening metathesis polymerization and enhanced thermal stability through hydrogenation. The polymers can be easily degraded into small molecule or oligomeric species under mildly acidic conditions.
Article
Chemistry, Organic
Paul Shaw, Storm J. Hassell-Hart, Gayle E. Douglas, Andrew G. Malcolm, Alan R. Kennedy, Gemma White, Laura C. Paterson, William J. Kerr
Summary: In this study, we applied silyl enol ether moieties as efficient alkene coupling partners within cobalt-mediated intramolecular Pauson-Khand reactions. This cyclization strategy delivers valuable oxygenated cyclopentenone products in high yields and allows for the incorporation of a variety of decorated structures.
Article
Green & Sustainable Science & Technology
Jianjun Ren, Shensheng Ni, Yunpeng Shen, Dongze Niu, Rumeng Sun, Chongqing Wang, Liujie Deng, Qiaopan Zhang, Yue Tang, Xingmei Jiang, Zhijie Li, Chunyu Li
Summary: This study isolated a novel erythromycin-degrading bacterium rjjtx-2 and identified it as Rhodococcus gordoniae rjjtx-2. The bacterium degrades erythromycin into C21H34O6 through cleavage of the lactone ring and reduction of cladinose and desosamine. Cloning and expression of the degradation enzyme EreA and prediction of the three-dimensional structure of erythromycin-binding and catalytic residues suggest that R. gordoniae rjjtx-2 is a promising bacterium for remediation in erythromycin contaminated environments.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Environmental Sciences
Jianjun Ren, Xiancheng Qi, Jian Zhang, Dongze Niu, Yunpeng Shen, Changyong Yu, Junqiang Zhi, Chongqing Wang, Xingmei Jiang, Wenfan Zhang, Chunyu Li
Summary: Continuous and excessive usage of erythromycin leads to environmental pollution and poses a health risk to humans. In this study, a novel erythromycin-degrading bacterial strain, W7, was isolated from sewage sludge and identified as Paracoccus versutus. The strain efficiently degraded erythromycin and completely eliminated it from erythromycin fermentation residue within specific timeframes. Additionally, erythromycin esterase (EreA) was found to be involved in erythromycin metabolism in this strain.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Chemistry, Analytical
Chao Liu, Ming Lei, Yuyang Fan, Xiangchen Kong, Huiyan Zhang, Rui Xiao
Summary: This study systematically investigates the formation mechanism of enol ether (EE) from the pyrolysis of beta-O-4 linkages in simplified lignin models. Results show that EE intermediates are difficult to generate in beta-O-4 phenyl structures, but the activation of alpha/beta-substituted side chains promotes EE formation. Free phenolic hydroxyl groups and corresponding phenoxy radicals are effective activators for EE formation.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Environmental Sciences
Jiping Li, Kai Liu, Wei Li, Meng Zhang, Pingping Li, Jiangang Han
Summary: Microalgae-based biotechnology for antibiotic removal is a promising and environmentally friendly method. This study investigated the mechanism of erythromycin removal by Chlorella pyrenoidosa and its impact on microalgae's ecotoxic response. Biodegradation was found to be the main removal mechanism, while high concentrations of erythromycin inhibited microalgae growth and led to the production of more toxic degradation products.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Manufacturing
Lisa Feuillerat, Olivier De Almeida, Jean-Charles Fontanier, Fabrice Schmidt
Summary: The study found that PEEK degradation has a significant impact on the consolidation of commingled preforms, resulting in high porosity. Analyses using FTIR and GPC showed minor structural changes in PEEK yarns, with sizing in the preforms having a huge influence on degradation kinetics.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Chemistry, Multidisciplinary
Jesse H. Hsu, Tyler E. Ball, Sewon Oh, Erin E. Stache, Brett P. Fors
Summary: This study demonstrates a method to degrade polymers using electrochemistry, and investigates the selectivity and efficiency of the process. Electrocatalytic degradation of polymers with activated C-H bonds is achieved through oxidative polymer degradation promoted by molecular oxygen and electrochemically mediated hydrogen atom transfer (HAT).
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Environmental Sciences
Aniqa Ashraf, Guijian Liu, Balal Yousaf, Muhammad Arif, Rafay Ahmed, Audil Rashid, Luqman Riaz, Muhammad Saqib Rashid
Summary: This review focuses on the degradation of erythromycin using photocatalytic nanocomposites. It is found that phyto-mediated composites can efficiently produce reactive radicals for effective erythromycin degradation. The study also highlights the superiority of composites over single nanoparticles. The review provides valuable insights into the characteristics of photocatalytic nanocomposites and the mechanism of erythromycin degradation, inspiring innovative ideas for water purification.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Biotechnology & Applied Microbiology
Jianjun Ren, Biyun Lai, Dongze Niu, Zhenzhu Wang, William James Hardie, Junqiang Zhi, Chongqing Wang, Yicheng Yu, Huhe Taoli, Zhijie Li, Xingmei Jiang, Chunyu Li
Summary: In this study, a new fungus named Aspergillus sydowii strain W1, capable of utilizing erythromycin as its carbon source, was isolated from erythromycin-contaminated soil. It was found that strain W1 could degrade erythromycin efficiently (84.05%) within seven days under optimal conditions. The degradation pathway of erythromycin and the enzymes involved in the metabolism were also investigated.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2023)
Article
Polymer Science
Dongfang Zhao, Zheng Li, Yong Shen, Zhibo Li
Summary: The development of chemically recyclable polymers with closed-loop life cycles is considered the most attractive strategy for creating a circular plastic economy. In this study, enantiopure O-heterocyclic lactones with pendent phenyl substituent were successfully prepared and used as raw materials to synthesize poly(ether-ester)s with controlled molecular weights, narrow dispersities, and well-defined terminal groups. The monomer stereoconfiguration significantly affects the polymerization kinetics, thermodynamics, and thermal/mechanical properties of the resulting polyesters. Both resultant polymers demonstrated closed-loop recyclability, and depolymerization back to pristine monomers was easily achieved using stannous octoate as the catalyst in solution.
Article
Agriculture, Multidisciplinary
Takuya Hayashi, Takashi Hosoya, Hisashi Miyafuji
Summary: Alkaline nitrobenzene oxidation (AN oxidation) is an important method for analyzing lignin chemistry, but the detailed chemical reactions involved in this process are not fully understood. Specifically, the reaction pathways in the AN oxidation of a common model compound in lignin chemistry, guaiacyl glycerol-beta-guaiacyl ether (GG), have not been experimentally supported. This study investigates the formation pathway of vanillin in the AN oxidation of GG and proposes a vanillin formation pathway involving an enol ether intermediate called C2EE. The comparison of vanillin yields suggests that there are unknown pathways involved in vanillin formation from GG where C2EE is not an intermediate.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2023)
Article
Polymer Science
E. Pajuste, I Reinholds, G. Vaivars, A. Antuzevics, L. Avotina, E. Sprugis, R. Mikko, K. Heikki, R. M. Meri, R. Kaparkalejs
Summary: This study evaluates the effects of electron beam irradiation on two types of proton exchange membranes (PEM) and finds that sulfonated poly(ether-ether-ketone) (SPEEK) exhibits higher mechanical and thermal stability after irradiation, making it a promising replacement for traditional PEM in fuel cell applications exposed to ionizing radiation.
POLYMER DEGRADATION AND STABILITY
(2022)
Article
Polymer Science
Ding Chen, Xinyuan Cao, Santosh K. Tiwari, Oluwafunmilola Ola, Nannan Wang, Yanqiu Zhu
Summary: This study developed inorganic nanoparticle-reinforced polymer nanocomposites, which enhanced mechanical and thermal properties by improving compatibility and increasing thermal stability.
POLYMER DEGRADATION AND STABILITY
(2022)
Article
Environmental Sciences
Jianjun Ren, Zhenzhu Wang, Liujie Deng, Dongze Niu, Huhetaoli, Zhijie Li, Liping Dong, Jin Zhang, Ruitao Zhang, Chunyu Li
Summary: This study isolated a novel erythromycin-degrading fungus P. oxalicum RJJ-2, which showed high efficiency in degrading erythromycin in MSM medium with erythromycin as the sole carbon source at 35°C and pH 6.0. HPLC-MS analysis indicated that the main degradation intermediates were 3-depyranosyloxy erythromycin A, cladinose, desosamine, and 7,12-dyhydroxy-6-deoxyerythronolide B.
WASTE AND BIOMASS VALORIZATION
(2021)
Article
Entomology
Johan P. van den Heever, Thomas S. Thompson, Simon J. G. Otto, Jonathan M. Curtis, Abdullah Ibrahim, Stephen F. Pernal
Article
Entomology
Johan P. van den Heever, Thomas S. Thompson, Simon J. G. Otto, Jonathan M. Curtis, Abdullah Ibrahim, Stephen F. Pernal
Article
Chemistry, Applied
Johan P. van den Heever, Thomas S. Thompson, Jonathan M. Curtis, Stephen F. Pernal
Article
Biochemical Research Methods
Thomas S. Thompson, Johan P. van den Heever, Stephen F. Pernal
JOURNAL OF CHROMATOGRAPHIC SCIENCE
(2018)
Article
Chemistry, Analytical
T. S. Thompson, D. K. Noot, F. Forrest, J. P. van der Heever, J. Kendall, J. Keenliside
ANALYTICA CHIMICA ACTA
(2009)
Article
Environmental Sciences
Thomas S. Thompson, Rick Dimock, Robert W. Bradbury, Richard Rieve, Mark Fehr
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
(2011)
Article
Water Resources
Francine Forrest, Kristen Lorenz, Tom Thompson, Julia Keenliside, Joe Kendall, Jollin Charest
CANADIAN WATER RESOURCES JOURNAL
(2011)
Article
Chemistry, Applied
T. S. Thompson, D. K. Noot, J. D. Kendall
FOOD ADDITIVES AND CONTAMINANTS PART A-CHEMISTRY ANALYSIS CONTROL EXPOSURE & RISK ASSESSMENT
(2010)
Article
Food Science & Technology
Johan P. van den Heever, Thomas S. Thompson, Jonathan M. Curtis, Stephen F. Pernal
FOOD ANALYTICAL METHODS
(2015)
Article
Chemistry, Applied
T. S. Thompson, D. K. Noot, J. D. Kendall
Review
Agriculture, Multidisciplinary
Johan P. van den Heever, Thomas S. Thompson, Jonathan M. Curtis, Abdullah Ibrahim, Stephen F. Pernal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2014)
Article
Biochemical Research Methods
Thomas S. Thompson, Johan P. van den Heever, Joy A. F. Komarnicki
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2019)
Article
Biochemical Research Methods
Thomas S. Thompson, Johan P. van den Heever, Renata E. Limanowka
Article
Chemistry, Analytical
Thomas S. Thompson, Stephen F. Pernal, Donald K. Noot, Adony P. Melathopoulos, Johan P. van den Heever
ANALYTICA CHIMICA ACTA
(2007)
Article
Chemistry, Applied
M. Graca Dias, Elsa Vasco, Francisco Ravasco, Lufsa Oliveira
Summary: This study estimated the vitamin D intake of "adults" and "elderly" populations in Portugal using the TDS methodology. The results showed that the majority of people had inadequate vitamin D intake, well below the Dietary Reference Values.
Article
Chemistry, Applied
Yanan Wang, Jiachen Shi, Yong-Jiang Xu, Chin-Ping Tan, Yuanfa Liu
Summary: This study investigates the variations in lipid digestion profiles among individuals of different ages using in vitro digestion models. The findings suggest that adults have a more comprehensive lipid digestion compared to infants, and infants tend to release shorter chain length and more saturated free fatty acids during digestion. Additionally, the particle sizes in the stomach of the elderly were consistently larger. This study enhances our understanding of how lipids with different degrees of unsaturation undergo digestion in diverse age groups.
Article
Chemistry, Applied
Hyunjong Yu, Huisu Kim, Pahn-Shick Chang
Summary: Chitosan-pectin emulsion-filled hydrogel (EFH) was developed to enhance the bioaccessibility of lipophilic bioactive compounds through intestinal delivery. The EFH, prepared without crosslinking agents, demonstrated improved mechanical strength and compactness with higher pectin concentration. It retained the emulsion at pH 2.0 and released it at pH 7.4, resulting in enhanced release of free fatty acids and improved bioaccessibility of curcumin.
Article
Chemistry, Applied
Tongze Zhang, Siqi Hong, Jia-Rong Zhang, Pin-He Liu, Siyi Li, Zixian Wen, Jianwei Xiao, Guirong Zhang, Olivier Habimana, Nagendra P. Shah, Zhongquan Sui, Harold Corke
Summary: Lactic acid fermentation significantly affects the morphology and physicochemical properties of proso millet starch, including the formation of surface indentations and small pores, decrease in gelatinization temperatures, and changes in hardness and adhesiveness.
Article
Chemistry, Applied
Liqin Kong, Feng Hong, Peng Luan, Yiping Chen, Yaoze Feng, Ming Zhu
Summary: This study presents a novel impedance biosensor using composite nanomaterials and T1R1 as a signal probe, which can competitively and ultra-sensitively detect umami intensity. The biosensor exhibits exceptional analytical performance and is suitable for food flavor evaluation.
Article
Chemistry, Applied
Kunying Lv, Yixin Yang, Qilong Li, Ran Chen, Liang Deng, Yiwei Zhang, Ning Jiang
Summary: Horse's milk, with its high nutritional value and low allergenic proteins, could be a substitute for cow's milk in infant consumption. A proteomic method was used to identify and compare milk fat globule membrane (MFGM) and whey proteins from different horse breeds. The study found differences in protein composition and functionality, which could support the development of formulas more suitable for human infants.
Article
Chemistry, Applied
Enrique Jacobo Diaz-Montana, Helene Brignot, Ramon Aparicio-Ruiz, Thierry Thomas- Danguin, Maria Teresa Morales
Summary: Sensory perception of virgin olive oil is influenced by phenols and volatiles, which are affected by the composition of the oil and biological factors. This study investigated the effect of saliva and phenols on the release of volatiles, and found that the presence of phenols decreased the release of saturated volatiles.
Article
Chemistry, Applied
Wei Zhou, Rui Zhang, Zhen Cai, Fangfang Wu, Yong Hu, Chao Huang, Kun Hu, Yun Chen
Summary: Environmentally friendly and outstanding pH-responsive cationic starch nanoparticles (CSNP) were prepared from pH-sensitive starch. CSNP exhibited nanosize and regular sphere, highly free-flowing molecular chains, and demonstrated excellent pH responsiveness through multiple emulsion/demulsification transitions.
Article
Chemistry, Applied
Andrea Koo, Vinayak Ghate, Weibiao Zhou
Summary: This study suggests that direct seeding may negatively affect the nutritional quality of crops, causing a decrease in ascorbic acid, vitamin K, and total glucosinolate content.
Article
Chemistry, Applied
Tonghao Du, Yazhou Xu, Xiaoyan Xu, Shijin Xiong, Linli Zhang, Biao Dong, Jinqing Huang, Tao Huang, Muyan Xiao, Tao Xiong, Mingyong Xie
Summary: This study successfully improved the ACE inhibitory activity of black sesame seeds by fermenting them with Lactobacillus Plantarum NCU116 and hydrolyzing them using acid protease. The RF-PSO model was used to predict the ACE inhibitory activity during the hydrolysis process. Eight peptides with ACE inhibitory activity were identified from fermented black sesame seed hydrolysates after separation and screening.
Article
Chemistry, Applied
Yao Liu, Songyi Lin, Kexin Liu, Shan Wang, Qiaozhen Liu, Na Sun
Summary: This study analyzed the structural changes of shrimp proteins during digestion, predicted the immunodominant epitopes, and validated their allergenicity. The results showed that shrimp proteins were degraded into peptides during digestion, but still carried IgE epitopes that trigger allergic reactions.
Article
Chemistry, Applied
Tiantian Fu, Hongwei Cao, Yu Zhang, Xiao Guan
Summary: This study investigates the impact of milling on the active components in rice, with a focus on the stability and bioaccessibility of phenols, VB1, and alpha-GABA during cooking and digestion. The findings show that milling exacerbates the instability of gamma-GABA during cooking and VB1 during digestion, and it affects the bioaccessibility of these active compounds.
Article
Chemistry, Applied
Zhihao Yang, Yanru Hou, Min Zhang, Puxin Hou, Chang Liu, Lu Dou, Xiaoyu Chen, Lihua Zhao, Lin Su, Ye Jin
Summary: This study investigated the molecular mechanism of feeding regimes on lamb flavor by using TMT labeling combined with MS. The results showed that pasture-fed groups had higher levels of amino acids and volatile flavor substances compared to concentrate-fed groups. Additionally, several differentially abundant proteins associated with lamb flavor were identified.
Article
Chemistry, Applied
Zixuan Xie, De Zhang, Junyu Zhu, Qianqian Luo, Jun Liu, Jingtao Zhou, Xiaoyong Wang, Yuqiong Chen, Zhi Yu, Dejiang Ni
Summary: This study investigated the acidification of aroma-enhanced black tea during storage. Analysis of non-volatile substances and organic acids using UPLC-Q-TOF/MS and HPLC revealed a decrease in soluble sugars and amino acids, while an increase in organic acids such as oxalic acid, malic acid, and quinic acid. In vitro experiments further demonstrated that the acidification is a result of the decomposition of sugars and amino acids by heating, as well as the oxidation of aromatic aldehydes. Additionally, the study showed that the taste composition of tea infusion is altered, with reduced amino acids, catechins, soluble sugars, and flavonoids. This research provides a theoretical basis for improving the quality of black tea.
Article
Chemistry, Applied
Lin Wang, Falai Ma, Zihan Li, Yan Zhang
Summary: This study developed time-temperature integrators based on amyloglucosidase@Cu3(PO4)2 nanoflowers for monitoring the freshness of chilled pork. The results showed that the integrators were highly reliable and accurate in predicting the quality of chilled pork.
