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蔗糖异构酶的制备及修饰研究进展

食品与发酵工业 2025年第3期51卷 385-394页

作者：李敏尚继旭贾振华罗德平廖爱美河南工业大学前沿交叉科学与技术学院河南郑州450001 河南工业大学国际教育学院河南郑州450001

异麦芽酮糖作为一种新型的功能性糖,具有低热量、防龋齿、易吸收、消化慢等特性,是糖尿病和肥胖者可食用的糖,可广泛应用于食品、医药和化妆品行业。目前,异麦芽酮糖的制备方法主要有化学合成法、植物转基因法、微生物转化法及酶转化法... 详细信息

异麦芽酮糖作为一种新型的功能性糖,具有低热量、防龋齿、易吸收、消化慢等特性,是糖尿病和肥胖者可食用的糖,可广泛应用于食品、医药和化妆品行业。目前,异麦芽酮糖的制备方法主要有化学合成法、植物转基因法、微生物转化法及酶转化法,其中,近年来酶转化法成为新的研究热点,主要运用到蔗糖异构酶。该文综述了蔗糖异构酶产酶菌株的诱变育种、异源表达、分子改造以及酶的化学修饰等方式在制备异麦芽酮糖的研究进展,以期为相关研究工作的开展和工业化生产提供指导。

关键词：异麦芽酮糖蔗糖异构酶诱变育种异源表达分子改造化学修饰

Recent applications of macrocycles in supramolecular catalysis

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Chinese Chemical Letters 2024年第4期35卷 132-141页

作者： Conghui Wang Lei Xu zhenhua jia Teck-Peng Loh College of Advanced Interdisciplinary Science and Technology Henan University of TechnologyZhengzhou 450001China Division of Chemistry and Biological Chemistry School of Chemistry Chemical Engineeringand BiotechnologyNanyang Technological UniversitySingapore 637371Singapore Institute of Advanced Synthesis School of Chemistry and Molecular Engineering Nanjing Tech UniversityNanjing 211816China

Numerous supramolecular macrocycles have been utilized for developing catalysts by exploiting their specific molecular recognition and ability to form inclusion complexes through noncovalent interactions. The cyclic structure and modified functional groups of these macrocycles can influence substrate and transition state stability, as well as reaction selectivity. The inner cavities of these macrocycles are particularly beneficial, as they enable substrates to adopt preorganized arrangements and serve as versatile platforms for highly efficient supramolecular catalytic systems. This minireview provides an overview of recent advancements in supramolecular catalysis using various macrocycles, such as crown ethers, cyclodextrins,calixarenes, pillararenes, cucurbiturils, and other novel macrocycles.

关键词： Supramolecular catalysis Macrocycle Host-guest interactions Confinement Selectivity

Clinical applications and pharmacological research progress of Lianhua Qingwen capsules/granules

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Journal of Traditional Chinese Medical Sciences 2021年第2期8卷 101-109页

作者： zhenhua jia Yiling Wu Hebei Yiling Hospital Shijiazhuang050091China State Key Laboratory of Collateral Disease Research and Innovative Chinese Medicine Medicines Key Laboratory of National Administration of Traditional Chinese MedicineShijiazhuang050035China Key Laboratory of National Administration of Traditional Chinese Medicine(Cardiovascular&Cerebrovascular Collateral Disease) Shijiazhuang050035China Hebei Academy of Integrated Traditional Chinese and Western Medicine Shijiazhuang050035China

Lianhua Qingwen capsule/granule is an innovative Chinese medicine developed under the guidance of the traditional Chinese medicine(TCM)collateral disease *** has the effect of“clearing heat and removing toxin,ventilating the lungs and discharging heat”.In 2003,it was approved as a new drug by the China National Medical Products Administration,through expedited approval during severe acute respiratory syndrome,and now,it has become a representative proprietary Chinese medicine for the treatment of infectious diseases of the respiratory *** studies have revealed that Lianhua Qingwen has broad-spectrum antiviral,antibacterial and anti-inflammatory,antipyretic,coughrelieving,and immunoregulation *** it has been used in the treatment of communicable and infectious respiratory diseases such as Coronavirus Disease 2019,influenza,colds,pulmonary infections,*** has achieved remarkable curative effects,showing the important clinical guidance of the TCM collateral disease theory.

关键词： Collateral disease theory Lianhua Qingwen COVID-19 Influenza Pneumonia Traditional Chinese medicine

Photo-promoted transition metal-free organic transformations in the absence of conventional photo-sensitizers

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Chinese Chemical Letters 2019年第8期30卷 1488-1494页

作者： zhenhua jia Yalin Yuan Xinlong Zong Bingquan Wu Jingyu Ma Institute of Advanced Synthesis School of Chemistry and Molecular Engineering Jiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing Tech University

During the last decade,photo-catalysis is emerging as a powerful tool in synthetic organic *** mini-review summarizes the recent advances of photo-promoted organic transformations under transition metal-free condition... 详细信息

关键词： Photo-promoted Transition metal-free Organic transformations Photo-sensitizer

An eco-friendly and highly sensitive loofah@CF/CNT 3D piezoresistive sensor for human activity monitoring and mechanical cotrol

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Science China(Technological Sciences) 2022年第11期65卷 2667-2674页

作者： ZHU Jie SONG YongTao XUE XiaoFei LIU ZhiLong MAO QingYuan jia zhenhua School of Computer Science and Engineering North China Institute of Aerospace EngineeringLangfang 065000China

Three-dimensional(3D)porous piezoresistive sensors are widely used because of their simple fabrication and convenient signal ***,because of the dependence on organic skeleton materials and the complexity of conductive coating preparation,the electrical and mechanical properties of 3D wearable piezoresistive sensors have gradually failed to accommodate many emerging ***,a new flexible 3D piezoresistive sensor(NF3PS)with high sensitivity and a wide measurement range is proposed,which comprises a natural porous loofah as a flexible framework and carbon fiber/carbon nanotube(CF/CNT)multiscale composite as a conductive *** of cellulose and lignin,the irregular,porous loofah has excellent mechanical strength,elasticity,and toughness,ensuring a repeated compression/recovery behavior of the *** addition,compared with the single-size carbon coating,the coupling of multiscale CF/CNT composite coating improves sensitivities over a range of *** NF3PS demonstrates a sensitivity of 6.94 kPa^(-1) with good linearity in the pressure range of 0–11.2 kPa and maintains a sensitivity of 0.28 kPa^(-1) in an ultrawide measurement range of 11.2–84.6 *** flexibility,robustness,and wide-ranging linear resistance variation,the feasibility of the NF3PS in human activity monitoring,mechanical control,and smart homes is *** work provides a novel strategy for a new generation of 3D flexible pressure sensors for improving sensitivity and measurement range and demonstrates attractive applications in wearable sensors.

关键词： 3D piezoresistive sensor loofah framework CF/CNT multiscale composite high sensitivity human activity monitoring mechanical control

Enhanced methanation stability of nano-sized MoS2 catalysts by adding Al2O3

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Frontiers of Chemical Science and Engineering 2015年第1期9卷 33-39页

作者： zhenhua LI jia HE Haiyang WANG Baowei WANG Xinbin MA Key Lab for Green Chemical Technology of Ministry of Education School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China

A series of unsupported MoS2 catalysts with or without Al2O3 modification was prepared using a modified thermal decomposition approach. The catalysts were tested for the methanation of carbon monoxide and the optimum one has 25.6wt-% Al2O3 content. The catalysts were characterized by nitrogen adsorption measurement, X-ray diffraction and transmission electron microscopy. The results show that adding appropriate amount of Al2O3 increases the dispersion of MoS2, and the increased interaction force between MoS2 and Al2O3 can inhibit the sintering of active MoS2 to some extent.

关键词： unsupported catalyst molybdenum sulfide,stability alumina methanation

Strategies for constructing seven-membered rings:Applications in natural product synthesis

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Chinese Chemical Letters 2024年第6期35卷 53-70页

作者： Peng Chen Lijuan Liang Yufei Zhu Zhimin Xing zhenhua jia Teck-Peng Loh College of Advanced Interdisciplinary Science and Technology Henan University of TechnologyZhengzhou 450001China Division of Chemistry and Biological Chemistry School of Chemistry Chemical Engineeringand BiotechnologyNanyang Technological UniversitySingapore 637371Singapore Institute of Advanced Synthesis School of Chemistry and Molecular Engineering Nanjing Tech UniversityNanjing 211816China State Key Laboratory of Applied Organic Chemistry Department of ChemistryLanzhou UniversityLanzhou 730000China

The seven-membered ring motifs are found in bioactive pharmaceuticals and a wide range of natural products,including alkaloids and terpenoids,which hold significant importance in synthetic chemistry and has garnered considerable attention from both academia and *** the challenges faced in the past decade,the total synthesis of natural products incorporating the non-aromatic cycloheptane skeletons remains a compelling ***,numerous elegant strategies for constructing the sevenmembered ring system have been successfully *** review focuses on the recent advancements in this field from 2017 to April 2023,highlighting key transformations utilized to construct the non-aromatic cycloheptane core structures and serves as a valuable guide for synthetic chemists engaged in the total synthesis of natural products containing seven-membered ring motifs.

关键词： Seven-membered rings Total synthesis Natural products Synthetic strategy Cycloheptane

TMSCF_(2)Br as both a C1 synthon and a F1 reagent

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Green Synthesis and Catalysis 2022年第4期3卷 303-305页

作者： Danhua Ge zhenhua jia Xuegiang Chu Institute of Advanced Synthesis School of Chemistry and Molecular EngineeringNanjing Tech UniversityNanjing 211816China

This highlight summarizes a recent development of KF-promoted three-component fluorinationaminocarbonylation reaction of aldehydes,tertiary amines,and TMSCF_(2)Br for the synthesis of structurally importantα-fluoroamide *** key to the success of this method could be attributed to the multiple functions of difluorocarbene precursor(TMSCF_(2)Br)as both a C1 synthon and a F1 reagent through the process of C-F bond cleavage and C-F bond re-formation.

关键词： TMSCF_(2)Br C1 synthon F1 reagent C-F functionalization Organofluoride

Development of catalyst-free carbon-sulfur bond formation reactions under aqueous media and their applications

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Green Synthesis and Catalysis 2022年第4期3卷 309-316页

作者： Min Sun Kang Joycelyn Yi Xin Khoo zhenhua jia Teck-Peng Loh Division of Chemistry and Biological Chemistry School of ChemistryChemical Engineering and Biotechnology(CCEB)Nanyang Technological UniversitySingapore 637371Singapore Henan University of Technology 100 Lianhua StZhongyuan DistrictZhengzhou 450001China

Methods for the carbon-sulfur bond formation under catalyst-free,aqueous conditions are extremely useful in organic synthesis and chemical *** laboratory has developed methodologies to construct carbon-thiol bonds,carbon-sulfinic acid bonds,and carbon-disulfide bonds and such methodologies have been widely adopted by other research groups over multidisciplinary *** this article,our work on C-S bond formation in an aqueous solvent and its corresponding applications is summarized.

关键词： Green synthesis Biocompatible Water-based reaction Biologics C-S bond