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Editorial Department of "Chemistry ＆ Bioengineering" has been Awarded "Advanced Collective for Studying and Implementing the Spirit of the Third Plenary Session of the 20th Central Committee of the Communist Party of China" by Hubei Provincial Editology Society for Science Periodicals in 2024
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Research Progress in Carbon-Based Catalysts Modification Strategies and Electrochemical Reactor for Synthesis of H_2O2 via 2e-ORR
LU Zilan;JIA Daqing;HU Huawei;ZHU Leilei;KHAN Asim;XU Wenxuan;LIAO Benren;ZHANG Lehua;The synthesis of hydrogen peroxide(H_2O2)via two-electron oxygen reduction reaction(2e-ORR)has become a new and sustainable alternative to industrial anthraquinone process due to its advantages of normal temperature and pressure operation,green raw materials,and renewable energy.Based on the brief explanation of synthetic mechanism of H_2O2 via 2e-ORR,we review the modification strategies of carbon-based catalysts,including heteroatom doping,defect engineering,functional groups,etc.At the same time,we summarize the structure characteristics and application scenarios of H-type,flow-type,and membrane electrode assembly(MEA)reactors,and point out the challenges faced by the current technology,which provides a theoretical support for the research of H_2O2 synthesis via 2e-ORR.
Research Progress in Hydrogen Production Technology from Oil and Gas Field Wastes Combined with Renewable Energy
GAO Jie;HAN Yuxiao;LI Landuo;SHE Yuehui;ZHANG Fan;SUN Shanshan;As a clean,low carbon,and efficient secondary energy,hydrogen possesses the characteristic of zero carbon emissions,which can effectively reduce greenhouse gas emissions and is one of the key technologies for achieving the goals of carbon peak and carbon neutrality.In recent years,the hydrogen production technology from oil and gas field wastes has received much attention due to its ability to not only effectively handle wastes,but also reduce the cost of hydrogen production and improve the utilization rate of resources.This technology combines renewable energy to form complementary advantages,further reducing energy consumption and environmental impact,providing a new path for energy transformation and sustainable development.We review the research progress of hydrogen production technology combined with renewable energy from oil and gas field wastes using water and oily wastes(oily sludge,oily wastewater)as raw materials,analyze their process flow,technical difficulties,and economic benefits,discuss the advantages and disadvantages of different technical routes,and reveal the challenges and opportunities in practical applications.This review provides a reference for the research and development of hydrogen production technologies as well as their industrialization promotion in the future.
Research Progress in Production of High-Value-Added Compounds by Syngas Fermentation
XIANG Yinbo;XIE Yimin;SUN Wei;WEI Mingken;JIANG Limei;Syngas fermentation can convert CO,CO2,and H2 into short-chain compounds(acetic acid,ethanol,etc.),high-value-added compounds(medium-chain compounds such as butyrate,butanol,hexanoate,hexanol,and polymers such as polyhydroxyalkanoates).Short-chain compounds have achieved industrial production,while medium-chain compounds and polymers are not synthesized efficiently due to scarce strain resource availability,poor strain compatibility,and metabolic pathway constraints.In this paper,we elaborate on the synthesis pathways of medium-chain compounds and polymers by syngas fermentation,compare relevant microorganisms and synthesis efficiency,analyze the effects of pH value,trace metals,and gene modification on syngas fermentation,and provide reference for the development of efficient syngas fermentation technology.
Preparation of Ir-Ni Alloy Nanomaterial Confined Within Hyperbranched Polymer and Its Performance for Efficient Catalytic Hydrogenation of Nitrobenzene at Room Temperature
DENG Yi;TAN Huanya;LAN Shuling;ZHAO Yanxi;HUANG Tao;Using the self-assembled structure of a hydroxyl-terminated hyperbranched polymer(HHP)in methanol as a carrier,IrCl3 and NiCl2 as metal precursors,and an appropriate amount of NaHCO3 as an auxiliary agent,we prepared an Ir-Ni composite material Ir-Ni@HHP loaded with HHP through an oil bath reaction at100 ℃for 80 min.Subsequently calcinating at 350℃for 2h to partially carbonize and crosslink the HHP selfassembled structure,we successfully prepared an Ir-Ni alloy nanomaterial Ir-Ni@ HHP-350 confined within HHP.Moreover,we applied the Ir-Ni@HHP-350 to the selective hydrogenation of nitrobenzene to aniline and investigated its catalytic performance.The results show that the prepared Ir-Ni@HHP-350 exhibits extremely high catalytic activity,selectivity,and cycling stability for the hydrogenation of nitrobenzene.When the reaction is conducted in methanol as a solvent at room temperature(25℃)under a hydrogen pressure of 0.5 MPa for 15 min,the conversion rate of nitrobenzene and the selectivity of aniline are both as high as 100%.This study provides a new approach for the development of efficient catalysts for the selective hydrogenation of nitroaromatics at room temperature.
Gene Delivery and Cell Targeting Abilities of Folic Acid-Modified Sulfonium Compounds
BI Xinrui;LIU Bingling;LI Wanning;CHEN Peiyu;LI Jing;We designed and synthesized novel sulfonium compounds,and explored the synthesis methods and physicochemical properties of folic acid-modified sulfonium compounds.Moreover,we evaluated the toxicity and targeting uptake abilities of folic acid-modified sulfonium compounds to HeLa cells.The results show that,through the Click reaction,folic acid-medification is carried out on two designed and synthesized sulfonium compounds,and the folic acid-modified sulfonium compounds are successfully obtained.When the molar ratio of sulfonium compounds and folic acid-modified sulfonium compounds is 1:0.2,it can effectively encapsulate the plasmid DNA to form a nanocomposite with a particle size of 270-350 nm and a Zeta potential of 26-33 mV.Folic acid-modification reduces the cytotoxicity of the sulfonium compounds.The uptake ability of folic acidmodified sulfonium compounds to HeLa cells is stronger.This study provides a theoretical basis for the research of gene-targeted delivery systems for sulfonium compounds.
Simulated Processing of Lappaconitine from Aconitum leucostomum Worosch in Xinjiang Based on UPLC-Q-Exactive MS
CAO Xingxing;SAILIKE Gulidali;QIN Yihui;LIN Xinyue;LI Xiaojuan;ZHAO Feicui;Based on the simulated processing method of traditional Chinese medicine,we conducted co-boiling processing of Aconitum leucostomum Worosch with water,8% licorice,10% black beans,and 8% licorice+10% black beans as adjuvants.Moreover,we performod the simulated processing of lappaconitine monomer and investigated its content change pattern by HPLC.Furthermore,we investigated the chemical stability of lappaconitine under different processing conditions by UPLC-Q-Exactive MS,and carried out the qualitative analysis of the qualitative changes in the samples and the introduced components of adjuvants,so as to reveal its processing mechanism.The results show that when using 8% licorice+10% black beans as processing adjuvants,the content of lappaconitine changes the most significantly.During the simulated processing of lappaconitine monomer,the content of lappaconitine in water gradually increases as the proocessing time increases,and no unknown peaks appear in the HPLC chromatogram after processing.The processing adjuvants don't affect the hydrolysis of lappaconitine,but can introduce new chemical components;the C4 ester bond of the alkaloid in Aconitum leucostomum Worosch is unstable,and prolonged processing is prone to hydrolyze it to generate low-toxic amine-alcohol diterpene alkaloids.The study provides a basis for the processing mechanism of "adjuvants coboiling" in Aconitum leucostomum Worosch to achieve "attenuating toxicity and preserving effect".
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Preparation,Antioxidant Activity,and Bioaccessibility of Glycosylated Zein-Morin Pigment Nanoparticles
LI Siyi;WANG Cunwen;LUO Minhui;LEI Sichao;YANG Fang;To add ress the problems of poor water solubility and low bioaccessibility of morin,we prepared glucose-glycosylatedzein(GLZ) via Maillard reaction by using zein as a raw material and constructed the glycosylated zein-morin(GLZ-Morin) nanoparticles by an vent method.Moreov er,we investigated their formationmechanism and functional activities.The antiresults-solshow that the solubilityof GLZ is significantly better than that of zein.When the pH valuei s between 5 and 10,the solubility of GLZi s 1.62 to 3.04 times that of zein.T he particle sizes of GLZ-Morin nanoparticles with different mass ratios are all less than 200 nm,the dispersionco efficients are alll ess than 0.30,and the absolute values of Zeta potential are all greater than 20 mV,indicatingthat GLZ-Morin has good dispersibility and stabi lity.The encapsu lation rates of GLZ-Morin are significan tly higher than that of Zein-Morin15∶1.Fluorescencespectroscopy andFourier transformi nfrared spectroscopycon firm that GLZ and morin are combined through hydrogen bond,electrostatic,and hydrophobic interaction.Whenthe mass ratio of GLZ to morin is 15∶1,the DPPH free radical scavenging rate and in vitro bioaccessibility of GLZ-Morin15∶1 are 92.4 9% and 57.53%,respectively,significantly higher than those of morin and Zein-Morin15∶1.Therefore,GLZcan effectively deliver morin,providing supports for the application of morin in field of functional food.
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Photothermal Conversion of Defective Molybdenum Oxide:from Structural Properties to Typical Applications
LIU Meijing;WU Xiaoqin;QIAO Jianxian;BAO Hebin;Owing to unique electronic structure and excellent photothermal performance,defective molybdenum oxide(MoO3-x) has attracted considerable attention in the field of photothermal conversion.We elaborate thestru cture,properties,and photothermal conversion mechanism of MoO3-x,includingnon-radiative heat genera tioninduced by defect-assisted interband transitions,and heat genera tion through electron-phonon coupling tolattice relaxation of hot electrons excited by localized surface plasmonresonance(LSPR).Moreover,wei ntroduce the current research status of MoO3-x in tumor photothermaltherapy,solar-driven interfacial photothermalwater evaporation,and photothermal catalysis.Furthermore,we clarify the correlation between the spectral resp onse range and photothermal conversion efficienc y under the regulation of oxygen vacancy defects.Finally,wepoint out the main challenges faced by MoO3-x inpreparation of precise defect,enhancement of material stability,improvement of photothermal conversion efficiency,and evaluation of biological application safety.
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Research Progress in Application of Functional Microorganisms and Their Composite Microbial Inoculants in Straw Composting
QIN Huifeng;LI Guangyu;ZHAO Chunxiao;HU Jianhua;LIU Zhanying;As an important way for efficient utilization of straw,composting efficiency of straw composting is closely related to the development and application of microbial inoculants.Straw contains high levels of cellulose,hemicellulose,and lignin,making it difficult to degrade,the rational use of microbial inoculants is crucial for improving composting efficiency.We review the roles of functional microorganisms such as Bacillus and Aspergillus in straw composting.Moreover,we introduce the degradation mechanisms of cellulases,hemicellulases,and ligninases.Furthermore,we summarize the screening and breeding methods of superior strains,and compare the formulations and application effects of various composite microbial inoculants.The study provides theoretical foundations and practical guidance for the further research and development,and large-scale application of microbial inoculants in straw composting.
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Ultrasonic-Assisted Deep Eutectic Solvent Extraction of Total Flavonoids from Nandina domestica Thunb. Fruits and Its in vitro Antioxidant and Antibacterial Activities
JIA Shanshan;REN Yuanyuan;CHEN Shengxi;PENG Yuan;We extracted total flavonoids from Nandina domestica Thunb.fruits by ultrasonic-assisted deep eutectic solvent method.Moreover,we optimized the extraction process through single-factor experiments and response surface methodologies,and studied the in vitro antioxidant and antibacterial activities.The results show that the optimal extraction conditions of total flavonoids from Nandina domestica Thunb.fruits are as follows:the ultrasonic time of 32 min,the solid-liquid ratio of 1:69(g:mL),the molar ratio of choline chloride to urea of 1:2.9,and the choline chloride-urea moisture content of 40%.Under above conditions, the yield of total flavonoids from Nandina domestica Thunb.fruits is 49.52 mg·g-1,which is close to the predicted value of 49.70 mg·g-1.The total flavonoids from Nandina domestica Thunb.fruits exhibits strong scavenging abilities against DPPH, ABTS,and hydroxyl free radicals,shows a certain antibacterial effect against Staphylococcus aureus,and can enhance the antibacterial effect of Ceftriaxone Sodium.
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Research and Application Progress of Catalase
LIU Ling-zhi1,2,ZHONG Guang-rong1,XIONG Lian1,2,CHANG Yan-hong2,XIAO Bao-qing2,LUO Hui1(1.Department of Biological Science and Technology,University of Science and Technology Beijing,Beijing 100083,China;2.Department of Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China)As one kind of oxidase,catalase can be found in almost all animals,plants and microorganisms.With high efficiency in peroxide catalyzing,catalases have important potential in industrial applications.On the base of reviewing enzyme classification,functions and structure,this paper focuses on the enzyme purifying and the research progress of catalases from extremophiles,and introduces the applications of catalase on food industry,environmental protection,paper making industry and textile industry.
Comparison and Improvement of Three Determination Methods for Lipase Activity
JIANG Hui-fang,WANG Ya-qin,LIU Chun-guo(Department of Biochemical Engineering,College of Life Science and Technology,Beijing University of Chemical Technology,Beijing 100029,China)Three common lipase activity determination methods including alkaly titrition method,p-nitrophenol(NP) method and copper soap method,aiming at consuming time,accuracy and repeatability,are compared.With an effective way to terminate the reaction being found,the improved p-NP method is stable and rapid.With toluene instead of benzene,the improved copper soap method possesses less toxicity,good stability and repeatability.
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Determination of Vitamin C Content in Five Kinds of Fruits and Vegetables by UV Spectrophotometry
MA Hong-fei,LU Sheng-you,HAN Qiu-ju,LI Wei(School of Environmental and Biological Engineering,Liaoning Shihua University, Fushun 113001,China)The vitamin C contents in five familiar fruits and vegetables were determined by UV spectrophotometry on the basis of the vitamin C characters of UV absorbing and alkali instability.The maximum absorbing wavelength of vitamin C determination by UV spectrophotometry was 243.4 nm,the standard curve equation was A=0.0528c-0.0568,the correlation coefficient R2=0.9996.The vitamin C content in green pepper,citrus junos,cucumber,apple,tomato was 117.1 mg·(100 g)-1,69.3 mg·(100 g)-1,20.5 mg·(100 g)-1,14.9 mg·(100 g)-1 and 18.4 mg·(100 g)-1,respectively.The determination of vitamin C content by UV spectrophotometric method was simple and fast with satisfactory result.
Research Progress on Pretreatment Technologies of Lignocellulose
ZHAO Lü1,LI Zhi-guang1,2,LI Hui-yong1,2,XIE Lei1, ZHOU Zhi1(1.College of Science,Hunan Agricultural University,Changsha 410128,China;2.Institute of Cheimstry & Chemical Engineering,Central South University,Changsha 410083,China)This paper reviews the components and structure of lignocellulose,states some promising pretreatment technologies in recent years,evaluates the main pretreatment technologies.
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Research Progress of Chlorogenic Acid
DENG Liang, YUAN Hua, YU Zong-yuan(Hubei Research Institute of Chemistry, Wuhan 430074, China)The distribution ,biosynthesis,properties, pharmaceutical activity,the extraction and purifying technology and applied prospect of chlorogenic acid were reviewed in this paper, which tried to provide references for the research of chlorogenic acid, and the production of the medicines comprising chlorogenic acids as well.
Research Advances of Separation and Purification for Protein
WANG Zi-jia1,LI Hong-mei2,GONG Ai-jun1,CAO Yan-qiu1,YUAN Hai-tao1(1.University of Science and Technology Beijing,Beijing 100083,China;2.National Institute of Metrology,Beijing 100013,China)The method of separation and purification for protein is one of the hotspots of the field for life science.This article summarizes many methods of separation and purification,based on the characteristic of protein′s acid-bases,the size and shape of the molecular,the solubility and the compatibility with legends.
[Downloads: 12,053 ] [Citations: 172 ] [Reads: 54 ] HTML PDF Cite this article
Determination of Vitamin C Content in Five Kinds of Fruits and Vegetables by UV Spectrophotometry
MA Hong-fei,LU Sheng-you,HAN Qiu-ju,LI Wei(School of Environmental and Biological Engineering,Liaoning Shihua University, Fushun 113001,China)The vitamin C contents in five familiar fruits and vegetables were determined by UV spectrophotometry on the basis of the vitamin C characters of UV absorbing and alkali instability.The maximum absorbing wavelength of vitamin C determination by UV spectrophotometry was 243.4 nm,the standard curve equation was A=0.0528c-0.0568,the correlation coefficient R2=0.9996.The vitamin C content in green pepper,citrus junos,cucumber,apple,tomato was 117.1 mg·(100 g)-1,69.3 mg·(100 g)-1,20.5 mg·(100 g)-1,14.9 mg·(100 g)-1 and 18.4 mg·(100 g)-1,respectively.The determination of vitamin C content by UV spectrophotometric method was simple and fast with satisfactory result.
Research and Application Progress of Catalase
LIU Ling-zhi1,2,ZHONG Guang-rong1,XIONG Lian1,2,CHANG Yan-hong2,XIAO Bao-qing2,LUO Hui1(1.Department of Biological Science and Technology,University of Science and Technology Beijing,Beijing 100083,China;2.Department of Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China)As one kind of oxidase,catalase can be found in almost all animals,plants and microorganisms.With high efficiency in peroxide catalyzing,catalases have important potential in industrial applications.On the base of reviewing enzyme classification,functions and structure,this paper focuses on the enzyme purifying and the research progress of catalases from extremophiles,and introduces the applications of catalase on food industry,environmental protection,paper making industry and textile industry.
Comparison and Improvement of Three Determination Methods for Lipase Activity
JIANG Hui-fang,WANG Ya-qin,LIU Chun-guo(Department of Biochemical Engineering,College of Life Science and Technology,Beijing University of Chemical Technology,Beijing 100029,China)Three common lipase activity determination methods including alkaly titrition method,p-nitrophenol(NP) method and copper soap method,aiming at consuming time,accuracy and repeatability,are compared.With an effective way to terminate the reaction being found,the improved p-NP method is stable and rapid.With toluene instead of benzene,the improved copper soap method possesses less toxicity,good stability and repeatability.
[Downloads: 7,597 ] [Citations: 272 ] [Reads: 55 ] HTML PDF Cite this article
Research Progress of Immobilized Enzyme
CHEN Jian-long~(1,2),QI Jian-cheng~1,CAO Yi-zhi~2,GUO Yong~1,DUAN Hui-li~1(1.Institute of Medical Equipment,Academy of Military Medical Sciences, National Engineering Research Center for Biological Protective Equipment,Tianjin 300161,China;2.School of Life Science,Lanzhou University,Lanzhou 730000,China)The immobilized enzymes have been widely applied in many fields for their more advantages than free enzyme,especially for their stability and reusability.At present,immobilization technologies of enzyme have obtained wonderful development.The research of immobilized enzyme will be a very important development field in the enzyme engineering in the future.In this article,various conventional and new methods for preparation of immobilized enzyme are introduced. At the same time,the immobilization of enzyme on some carriers with excellent properties are reviewed.