Article
Chemistry, Organic
Austin S. Moore, Levi M. Stanley
Summary: A novel nickel-catalyzed reaction system is reported for the intramolecular carboacylation of imides containing a tethered alkene and tetraarylborate nucleophiles, showing high yield and site selectivity.
Article
Chemistry, Organic
Ekaterina Levashova, Maria Adamchik, Grigory Kantin, Dmitry Dar'in
Summary: Here, a chemo- and diastereoselective formal C-C insertion reaction was described, which introduced 1,2-disubstituted 4-diazo-3(2H)-isoquinolones and 4-diazoisochroman-3-one into the C-CHO bonds of aldehydes, resulting in all-carbon α-quaternary aldehydes bearing medicinally important 1,4-dihydro-3(2H)-isoquinolone scaffold. The protocol exhibited preferential 1,2-carbon migration over the common 1,2-H shift, and the reaction tolerated various functionalities in both aldehyde and diazo components, providing the target homologated aldehydes in generally high yields. The synthetic utility of this method was further demonstrated by transformations of the formyl moiety.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Li-Rong Yang, Yi-Jun Zhao, Cheng-Jie Jiang, Rui Xiong, Huan Wang, Jia-Xing Lu
Summary: The La0.7Sr0.3Fe0.8Ni0.2O3 catalyst showed higher activity for the asymmetric electrocarboxylation of acetophenone, with 95% enantiomeric excess and 85% yield, attributed to increased lattice oxygen and Fe4+ species on its surface, enhanced electrochemically active surface area, and faster electron transfer. Additionally, La7Sr3Fe8Ni2 also demonstrated remarkable stability and reusability.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Organic
Yong-Li Zhong, Yining Ji, Heather Wang, Xiao Wang, Donald R. Gauthier
Summary: A highly efficient enantioselective synthesis method was developed for the synthesis of potent G-protein-coupled receptor 40 agonist MK-2305. The key tetrasubstituted olefin was prepared through a stereoselective chemical reaction, followed by highly enantioselective rhodium-catalyzed transfer hydrogenation to obtain the target compound MK-2305 in high purity. The tethered catalysts used in the reaction showed superior reactivity, as revealed by NMR studies.
Article
Chemistry, Organic
Nida Sezin Colak, Erbay Kalay, Engin Sahin
Summary: The study successfully demonstrated the bioreduction of aromatic and heteroaromatic ketones into optically active alcohols using Lactobacillus senmaizukei as a whole-cell catalyst. The method showed good performance in terms of yields and enantioselectivity.Furthermore, the findings indicate that L. senmaizukei is a promising biocatalyst for the asymmetric reduction of both 6-membered and 5-membered heteroaromatic methyl ketones, offering a green and cost-effective approach for the synthesis of biologically important chiral alcohols.
SYNTHETIC COMMUNICATIONS
(2021)
Article
Engineering, Environmental
Manal Ali Alhefeiti, Khawlah Athamneh, Ranjit Vijayan, Syed Salman Ashraf
Summary: The study isolated Bacillus cereus and Pseudomonas guariconensis bacteria from petroleum sludge, showing potential in efficient degradation of aromatic dyes and emerging pollutants. Among them, MA1 strain was the most promising, capable of degrading various dyes and emerging pollutants under optimal conditions. Transcriptome analysis revealed differential gene expression, indicating a rich reservoir of bacteria with powerful remediation abilities in petroleum sludge.
WATER SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Organic
Rui-Zhi Huang, Zhan-Cai Ma, Yuan Huang, Yu Zhao
Summary: A novel cobalt/zinc bimetallic catalysis system was developed for the efficient and enantioselective synthesis of tertiary propargylic alcohols. The system utilized commercially available catalysts and achieved high yields and good enantioselectivities.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Jonas Everaert, Karen Leus, Hannes Rijckaert, Maarten Debruyne, Kristof Van Hecke, Rino Morent, Nathalie De Geyter, Veronique Van Speybroeck, Pascal Van Der Voort, Christian V. Stevens
Summary: Covalent triazine frameworks (CTFs) based on polydentate ligands are promising catalyst supports that combine the reactivity of homogeneous catalysts with the robustness and recyclability of heterogeneous ones. In this study, a rhodium (III) complex was immobilized on a bipyridine-based CTF for the transfer hydrogenation of N-heteroarenes in water using sodium formate as the hydrogen source. The immobilized catalyst showed excellent activity for various quinoxalines and other N-heteroarenes, and maintained high activity during recycling, making it suitable for continuous flow synthesis.
Article
Chemistry, Multidisciplinary
Dibyajyoti Panja, Sadhan Dey, Rohini Saha, Rajib Sahu, Gourab Kanti Das, Preeti Bhobe, Sabuj Kundu
Summary: Transfer hydrogenation of non-polar bonds using methanol and ethanol as hydrogen sources is a challenging task. The development of a 3d metal-based catalyst has shown potential in achieving this reaction. This study successfully transfer hydrogenated azo compounds to primary amines using Co-SAC as the catalyst and ethanol/methanol as the hydrogen sources. Control experiments, Hammett studies, and DFT calculations were conducted to understand the mechanism and selectivity of the reaction.
Article
Biochemical Research Methods
Gertrud E. Morlock, Jan A. Morlock, Ayse D. Cardak, Annabel Mehl
Summary: Veterinary drug residues in food samples of animal origin are currently analyzed using high-performance liquid chromatography combined with sophisticated mass spectrometers. However, the results of this method are only partially consistent with microbiological results and positive findings occur rarely. Therefore, the potential of a non-target planar bioassay screening in veterinary drug residue analysis was studied. The results showed that non-target screening can provide a simple, rapid, eco-friendly, and non-target analysis, filling the gap in routine target analysis.
JOURNAL OF CHROMATOGRAPHY A
(2022)
Article
Chemistry, Multidisciplinary
Dong -Kai Wang, Liu-Bin Li, Fa-Liang Liu, Hui Qiu, Jiao-Zhe Li, Jianfeng Zhang, Chao Deng, Wen-Ting Wei
Summary: This study presents a novel method for the construction of all-carbon quaternary centers, specifically those with an alkyne-substituted framework, using a Fe-catalyzed formal insertion of diazo compounds into C(sp)-C(sp(3)) bonds of propargyl alcohols under mild conditions.
ACS CENTRAL SCIENCE
(2022)
Article
Multidisciplinary Sciences
Punam Thapa, Alina Thapa, Sujan Khadka, Sanjeep Sapkota, Om Prakash Panta, Suprina Sharma, Tika Bahadur Karki, Pramod Poudel
Summary: The study identified potential Bacillus strains as efficient producers of γ-PGA through physiological, biochemical, morphological, and molecular characterization, confirming certain Bacillus species as potent gamma-PGA producers. Under optimal conditions, these isolates exhibited excellent growth and yield of gamma-PGA.
Article
Biochemistry & Molecular Biology
Haeseong Park, Sun Il Seo, Ji-Hwan Lim, Jaekyeong Song, Joo-Hyun Seo, Pyoung Il Kim
Summary: This study investigated the metabolic changes occurring during carbofuran degradation by the Chryseobacterium sp. BSC2-3 strain using a metabolomics approach. The study identified the extracellular transformation of carbofuran into 3-hydroxycarbofuran by the strain. Intracellular metabolite analysis revealed the impact of carbofuran on various metabolic pathways and the production of disease resistance inducers and plant growth regulators by the strain.
Article
Biotechnology & Applied Microbiology
Marina Guimaraes Pacifico, Barbara Eckstein, Wagner Bettiol
Summary: The study focused on biological control of the Fusarium-nematode complex in cotton, selecting plant antagonistic strains that act against both pathogens. The most efficient strains were identified through biochemical tests and root colonization, with three strains of Bacillus velezensis ultimately chosen for controlling the complex disease in cotton plants.
BIOLOGICAL CONTROL
(2021)
Article
Chemistry, Multidisciplinary
Yan-Jun Li, Guang-Zhen Wan, Zhao-Hui Guo, Juan Chen
Summary: This study developed a target enzyme-oriented fishing strategy combined with UPLC-QTOF-MS/MS and molecular docking to screen and identify potential α-glucosidase inhibitors from Cyclocarya paliurus leaves. Thirty-six active compounds were identified from the leaves, and molecular docking revealed the inhibitory mechanisms of these compounds against α-glucosidase. The results provide valuable insights into the hypoglycemic activity of Cyclocarya paliurus leaves.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Article
Agricultural Engineering
Yinping Xiang, Meiying Jia, Rui Xu, Jialu Xu, Lele He, Haihao Peng, Weimin Sun, Dongbo Wang, Weiping Xiong, Zhaohui Yang
Summary: This study investigated the impact of the non-antibiotic pharmaceutical carbamazepine on antibiotic resistance genes (ARGs) during anaerobic digestion. The results showed that carbamazepine induced the enrichment of ARGs and increased the abundance of bacteria carrying these genes. It also facilitated microbial aggregation and intercellular communication, leading to an increased frequency of ARGs transmission. Moreover, carbamazepine promoted the acquisition of ARGs by pathogens and elevated their overall abundance.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Weixin Zhao, Tianyi Hu, Hao Ma, Dan Li, Qingliang Zhao, Junqiu Jiang, Liangliang Wei
Summary: This review summarizes the effects and potential mechanisms of biochar on microbial behavior in AD systems. The addition of biochar has been found to promote microbial colonization, alleviate stress, provide nutrients, and enhance enzyme activity. Future research directions include targeted design of biochar, in-depth study of microbial mechanisms, and improved models.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Christina Karmann, Anna Magrova, Pavel Jenicek, Jan Bartacek, Vojtech Kouba
Summary: This review assesses nitrogen removal technologies in reject water treatment, highlighting the differences in environmental impacts and economic benefits. Partial nitritation-anammox shows potential for economic benefits and positive environmental outcomes when operated and controlled properly.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Wei-Hao Huang, Ying-Ju Chang, Duu-Jong Lee
Summary: This study modified pinecone biochar with layered double hydroxide (LDH) to enhance its adsorption capacity for heavy metal and phosphate ions. The LDH-biochar showed significantly improved adsorption capacities for Pb2+ and phosphate, and a slight increase for Cu2+ and Co2+. The LDH layer enhanced the adsorption through various mechanisms.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Chao Song, Fanfan Cai, Shuang Yang, Ligong Wang, Guangqing Liu, Chang Chen
Summary: This paper developed a machine learning model to predict the biochemical methane potential during anaerobic digestion. Model analysis identified lignin content, organic loading, and nitrogen content as key attributes for methane production prediction. For feedstocks with high cellulose content, early methane production is lower but can be improved by prolonging digestion time. Moreover, lignin content exceeding a certain value significantly inhibits methane production.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Sang Min Lee, Ju Young Lee, Ji-Sook Hahn, Seung-Ho Baek
Summary: This study successfully developed an efficient platform strain using Yarrowia lipolytica for the bioconversion of renewable resources into adipic acid, achieving a remarkable increase in production level.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Sefkan Kendir, Matthias Franzreb
Summary: This study presents a novel approach using magnetic separation to efficiently harvest freshwater microalgae, Chlorella vulgaris. By combining pH-induced calcium phosphate precipitation with cheap natural magnetite microparticles, harvesting efficiencies up to 98% were achieved in the model medium.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Ishaq Kariim, Ji-Yeon Park, Wajahat Waheed Kazmi, Hulda Swai, In-Gu Lee, Thomas Kivevele
Summary: The impact of reaction temperature, residence time, and ethanol: acetone on the energy compositions and yield enhancement of biocrudes was investigated. The results showed that under appropriate conditions, biocrudes with high energy and low oxygen content can be obtained, indicating a high potential for utilization.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Xiyue Zhang, Xiyao Li, Liang Zhang, Yongzhen Peng
Summary: Intermittent aeration is an innovative approach to enhance nitrogen removal in low carbon-to-nitrogen ratio municipal sewage, providing an efficient strategy for the continuous plug-flow AOA process.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Xu Yang, Mahmoud Mazarji, Mengtong Li, Aohua Li, Ronghua Li, Zengqiang Zhang, Junting Pan
Summary: This study investigated the impact of magnetite on the nitrogen cycle of pig manure biostabilisation. The addition of magnetite increased N2O emissions and decreased NH3 emissions during composting. It also increased the total nitrogen content but should be considered for its significant increase in N2O emissions in engineering practice.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Ty Shitanaka, Haylee Fujioka, Muzammil Khan, Manpreet Kaur, Zhi-Yan Du, Samir Kumar Khanal
Summary: The market value of microalgae has exponentially increased in the past two decades, thanks to their applications in various industries. However, the supply of high-value microalgal bioproducts is limited due to several factors, and strategies are being explored to overcome these limitations and improve microalgae production, thus increasing the availability of algal-derived bioproducts in the market.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Martin Kerner, Thorsten Wolff, Torsten Brinkmann
Summary: The efficiency of using enriched CO2 from flue gas for large-scale production of green microalgae has been studied. The results show that the use of membrane devices and static mixers can effectively improve the CO2 recovery rate and maintain the suitable pH and temperature during cultivation, achieving a more economical and sustainable microalgae production.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Rui Ma, Ji Li, Rd Tyagi, Xiaolei Zhang
Summary: This review summarizes the microorganisms capable of using CO2 and CH4 to produce PHAs, illustrating the production process, factors influencing it, and discussing optimization techniques. It identifies the challenges and future prospects for developing economically viable PHAs production using GHGs as a carbon source.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Bing Wang, Peng Zhang, Xu Guo, Xu Bao, Junjie Tian, Guomin Li, Jian Zhang
Summary: The addition of zeolite in the co-composting of chicken manure and straw significantly reduced the emissions of ammonia and N2O, and increased the nitrate content. Zeolite also promoted the abundance of nitrification genes and inhibited the expression of denitrification genes.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Rohit Dey, Franziska Ortiz Tena, Song Wang, Josef Martin Messmann, Christian Steinweg, Claudia Thomsen, Clemens Posten, Stefan Leu, Matthias S. Ullrich, Laurenz Thomsen
Summary: This study investigated the operation of a 1000L microalgae-based membrane photobioreactor system for continuous secondary wastewater treatment. The research focused on a green microalgae strain called Desmodesmus sp. The study aimed to understand key trends and optimization strategies by conducting experiments in both summer and winter seasons. The findings showed that maintaining low cell concentrations during periods of light inhibition was beneficial for nutrient uptake rates. Effective strategies for enhancing algae-based wastewater treatment included cell mass recycling and adjusting dilution rates based on light availability.
BIORESOURCE TECHNOLOGY
(2024)