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microorganisms Linked to Neoproterozoic Microspar Carbonate Sedimentation in the Jilin-Liaoning Area

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Acta Geologica Sinica(English Edition) 2004年第3期78卷 784-789页

作者： GEMing KUANGHongwei MENGXianghua GeorgeFURNISS InstituteofSedimentaryBasin ChinaUniversityofGeoscienceXueyuanRoadBeijing100083China YangziUniversity NanjingJiangsuChina210000 GeologyDepartment UniversityofMontanaMissoulaMontana59812USA

Molar-tooth carbonate refers to a sort of rock that has ptygmatical folded structure comparable to the ivory. This kind of carbonate exists in a special time range (from Middle to Neoproterozoic). Its origin and the possibility to use it in stratigraphic correlation of the paleocontinent is the key task of the IGCP447, a project on Proterozoic molar tooth carbonates and the evolution of the earth (2001-2005). The importance lies in that the molar-tooth structure is the key to solving problems related to Precambrian biological and global geochemical events. The molar-tooth structure is associated with microorganisms. Development and recession of such carbonates have relations with the evolution process of early lives and abrupt changes in sea carbonate geochemistry. In recent years, based on researches on petrology, geochemistry and Sr isotope of molar-tooth carbonate in the Jilin-Liaoning and Xuzhou-Huaiyang area, the authors hold that it can be used as a marker for stratigraphic sequence and sedimentary fades analyses.

关键词： molar tooth carbonate Neoproterozoic sedimentary environment microorganisms origin

Recent progress on signalling molecules of coral-associated microorganisms

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Science China Earth Sciences 2019年第4期62卷 609-618页

作者： Kaihao TANG Yan WANG Xiaoxue WANG Key Laboratory of Tropical Marine Bio-resources and Ecology South China Sea Institute of Oceanology Chinese Academy of Sciences Ocean College Hainan University University of Chinese Academy of Sciences

Coral reefs have high primary productivity and are one of the most important ecosystems in the ocean. However, the health and stability of coral reefs are constantly threatened by climate change and human activities. The coral holobiont is a complex symbiosis between the coral animal, zooxanthellae, and the associated community of microorganisms including bacteria, archaea, viruses, etc. Coral-associated microorganisms are found to be important for the maintenance of coral health,and they are proposed to contribute to the acclimatization and adaptation of reef-building corals under rapid climate change. The coral-microbe interaction mediated by chemical signalling molecules is an important driving force for shaping the microbial communities. Herein, we summarize our current knowledge of the chemical signalling molecules involved in the interaction of the coral holobiont. Specifically, the cooperation and competition among microbes mediated by N-acyl homoserine lactones(AHLs), the interrelationship between microbes and hosts mediated by dimethylsulfoniopropionate(DMSP) and nitric oxide(NO), and the response of corals and microorganisms to reactive oxygen species(ROS) under environmental stresses are highlighted in this review. We further discuss the potential of manipulating the coral microbiome using signalling molecules to restore and protect coral reefs.

关键词： Reef-building coral Coral-associated microorganisms Coral microbiome Signalling molecules Quorum sensing DMSP

Living concrete with self-healing function on cracks attributed to inclusion of microorganisms: Theory, technology and engineering applications——A review

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Science China(Technological Sciences) 2021年第10期64卷 2067-2083页

作者： QIAN ChunXiang ZHENG TianWen RUI YaFeng School of Materials Science and Engineering Southeast UniversityNanjing 211189China Research Center of Green Building&Construction Materials Southeast UniversityNanjing 211189China Key Lab of Microbial Bio-mineralization Technology China Construction Materials IndustryNanjing 211189China Jiangsu Key Laboratory for Construction Materials Southeast UniversityNanjing 211189China

Concrete is the most widely used composite material in civil *** induced calcium carbonate precipitation(MICP)is a green and environmental friendly technology,which has received extensive attention in repair of concrete *** paper introduces the research progress in Southeast University research in past 16 *** the early stage,MICP technology of urea hydrolyzed by Bacillus pasteurii was mainly investigated to repair the surface cracks and to fill large-size cracks with ***,aiming at the hidden cracks that were difficult for human intervention,a new mineralization route of Bacillus mucilaginosus was proposed,which could repair faster than Bacillus alcalophilus,and the problem of ammonia emission in the repair process of Bacillus pasteurii was also *** addition,in order to improve the protection of bacteria and the self-healing efficiency of the later age cracks,the methods of fiber immobilization,carrier uniformly immobilization and core-shell structural immobilization had been compared and *** results showed that core-shell structural immobilization had good protection ability and strong ***’s more,the paper also summarized the characteristics of spore germination,cell activity,nucleation and biological calcium carbonate in crack zone,and introduced the application experience of microbial self-healing concrete in water conservancy projects and subway stations.

关键词： living concrete self-healing crack microorganisms engineering application

Impact of oxygen supply on production of terpenoids by microorganisms: State of the art

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Chinese Journal of Chemical Engineering 2021年第2期34卷 46-53页

作者： Ting-Ting Liu Han Xiao Jian-Hui Xiao Jian-Jiang Zhong State Key Laboratory of Microbial Metabolism Joint International Research Laboratory of Metabolic and Developmental SciencesLaboratory of Molecular Biochemical Engineering and Advanced Fermentation TechnologyDepartment of BioengineeringSchool of Life Sciences and BiotechnologyShanghai Jiao Tong UniversityShanghai 200240China Zunyi Municipal Key Laboratory of Medicinal Biotechnology Center for Translational MedicineAffiliated Hospital of Zunyi Medical UniversityZunyi 563003China

Terpenoids are a class of high value-added natural products with a variety of biological *** engineered microorganisms,such as those of Escherichia coli and Saccharomyces cerevisiae,have merits in producing plant or fungus-derived terpenoids,due to their mature genetic manipulation,simple nutrient demand and fast ***,as a key environmental factor,is particularly important to microbial metabolism and growth,and suitable oxygen supply is viewed as a prerequisite for realizing highly efficient production of terpenoids by engineered *** this article,the role of oxygen in regulating terpenoid bioproduction is overviewed from the viewpoints of cellular carbon metabolism,energy metabolism and terpenoid *** on adjusting oxygen availability to microorganisms,including genetic modification of cellular metabolism related with oxygen utilization,are summarized and discussed,to provide helpful information for further improvement of terpenoid biosynthesis by microbes.

关键词： Terpenoid microorganisms Oxygen supply Chassis modification

Engineered microorganisms and enzymes for efficiently synthesizing plant natural products

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Chinese Journal of Chemical Engineering 2021年第2期34卷 62-73页

作者： Wenqiang Li Wentao Sun Chun Li Key Lab for Industrial Biocatalysis Ministry of EducationDepartment of Chemical EngineeringTsinghua UniversityBeijing 100084China

Plant natural products are a kind of active substance widely used in pharmaceuticals and ***,the current production mode based on plant culture and extraction suffer complex processes and severe concerns for environmental and *** the increasing awareness of environmental sustainability,engineered microbial cell factories have been an alternative approach to produce natural *** engineering strategies have been utilized in microbial biosynthesis of complex phytochemicals such as dynamic control and substructure ***,Enzyme engineering including directed evolution and rational design has been implemented to improve enzyme catalysis efficiency and stability as well as change promiscuity to expand product *** this review,we discussed recent advances in microbial biosynthesis of complex phytochemicals from the following aspects,including pathway construction,strain engineering to boost the production.

关键词： Plant natural products microorganisms Synthetic biology Enzyme engineering

3D Casson nanofluid flow over slendering surface in a suspension of gyrotactic microorganisms with Cattaneo-Christov heat flux

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Applied Mathematics and Mechanics(English Edition) 2018年第5期39卷 623-638页

作者： V.NAGENDRAMMA C.S.K.RAJU B.MALLIKARJUNA S.A.SHEHZAD A.LEELARATHNAM Department of Mathematics SPMVV University Department of Mathematics GITAM University Department of Mathematics BMS College of Engineering Department of Mathematics COMSATS Institute of Information Technology

A mathematical model is proposed to execute the features of the non-uniform heat source or sink in the chemically reacting magnetohydrodynamic （MHD） Casson fluid across a slendering sheet in the presence of microorganisms and Cattaneo-Christov heat flux. Multiple slips （diffusion, thermal, and momentum slips） are applied in the modeling of the heat and mass transport processes. The Runge-Kutta based shooting method is used to find the solutions. Numerical simulation is carried out for various values of the physical constraints when the Casson index parameter is positive, negative, or infinite with the aid of plots. The coefficients of the skin factors, the local Nusselt number, and the Sherwood number are estimated for different parameters, and discussed for engineering interest. It is found that the gyrotactic microorganisms are greatly encouraged when the dimensionless parameters increase, especially when the Casson fluid parameter is negative. It is worth mentioning that th~ velocity profiles when the Casson fluid parameter is positive are higher than those when the Casson fluid parameter is negative or infinite, whereas the temperature and concentration fields show exactly opposite phenomena.

关键词： microorganisms multiple slip Casson fluid Cattaneo-Christov heat flux,slendering sheet

Analysis of the characteristics of microorganisms packed in the ice core of Malan Glacier,Tibet,China

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Science China Earth Sciences 2001年第S1期44卷 369-374页

作者：张晓君姚檀栋马晓军王宁练 1. Laboratory of Ice Core and Cold Regions Environment Cold and Arid Regions Environmental Engineering Research Institute Chinese Academy of Sciences 730000 Lanzhou China2. School of Life Science Lanzhou University 730000 Lanzhou China

Glacier is a special medium which can conserve a long time chronological information of microorganism. As a preliminary research, from Ice Core3 of Malan glacier (91°45.3r E, 35°48.4' N; drilled at 5620 m a.s.l. ), we successfully isolated live microorganisms. 75 strains of bacteria in 10 genera and 6 strains of actinomycetes in 2 genera were isolated from 23 samples. 32 strains bacteria were identified to be Bacillus and 25 strains were ***, ***, *** and 6. alvei. The genera of bacteria in Malan ice core were similar to that in Greenland and Antarctic ice core. We cannot isolate fungi and alga from Malan ice core, although they are widely distributed in Greenland and Antarctica.

关键词： ice core microorganisms genera.

Comparison of Antioxidant Activities in Black Soybean Preparations Fermented with Various microorganisms

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Agricultural Sciences in China 2010年第7期9卷 1065-1071页

作者： QIN Yao JIN Xiao-nan Park Heui Dong Department of Food Science and Technology Kyungpook National University Daegu 702-701 Korea Applied Plant Stress Biology Lab/Divison of Biotechnology/College of Life Sciences and Biotechnology Korea University Seoul 136-713 Korea

Black soybeans [Glycine max（L.） Merrill] were fermented with various GRAS（generally recognized as safe） microorganisms,including Aspergillus sp.,Bacillus *** yeast（Issatchenkia orientalis） at 30°C for 3 *** antioxidant contents,including total phenolics and total flavonoids,and the antioxidant activities of 1,1-diphenyl-2-picrylhydrazine（DPPH）,ferric reducing antioxidant power（FRAP） and *** were analyzed in preparations of fermented black *** cultures proved to yield significant levels of antioxidants compared with non-fermented cultures（P 〈 0.05）.Fermented black soybean preparations possessed antioxidant activities could be attributed to the total phenolics and flavonoids present.

关键词： antioxidant activity black soybean microorganisms fermentation

Do the microorganisms from laboratory culture spent growth medium affect house dust mite fitness and microbiome composition?

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Insect Science 2020年第2期27卷 266-275页

作者： Vit Molva Marie Bostlova Marta Nesvorna Jan Hubert Crop Research Institute Prague 6-RuzyneCzechia Faculty of Science Department of ParasitologyCharles UniversityPrague 2Czechia

The interaction of house dust mites(HDM)and microorganisms is the key factor in the survival of these mites in human-made *** growth medium(SPGM)provides the rest of the dict,along with dead mite bodies and *** represents a source of microorganisms for the recolonization of mite food and the mite digestive *** experiment was performed to observe how adding SPGM to the HDM diet affects HDM population growth,the microbiome composition and the microbial respiration in *** analyzed American house dust mite(Dermatophagoides farinae)and European house dust mite(Dermatophagoides pleronyssinus)originating from control diets and diets treated with an extract of SPGM from 1-and 3-month-old mite *** microbiome was described using 16S and 18S barcode *** composition of the bacterial and fiungal microbiomes differed between the HDM species,but the SPGM treatment influenced only the bacterial profile of *** the *** microbiome of specimens on SPGM-treated dicts compared to those of the control situation,the Lactobacillus profile decreased,while the Candinium,Staphylococ-cus,Acinetobacter,and Sphingomonas profiles *** addition of SPGM extract decreased the microbial respiration in the microcosms with and without mites in almost all *** SPGM did not influence the population growth of ***,but it had a variable effect on *** results indicated that the HDM are marginally influenced by the microorganisms in their feces.

关键词： diet feces feeding house dust mites microbiome microorganisms mites