Micro-organisms

Vi sinh vật (microorganisms) là những sinh vật nhỏ bé đến mức chỉ có thể thấy được chúng dưới kính hiển vi quang học hay kính hiển vi điện tử. Vi sinh vật gây ra rất nhiều bệnh hiểm nghèo cho người, cho gia súc, gia cầm. Tuy nhiên số vi sinh vật gây bệnh chỉ chiếm một phần rất nhỏ trong thế giới vi sinh vật. Từ xa xưa người ta đã biết ứng dụng các vi sinh vật có ích (tuy chưa hề biết tới sự tồn tại của chúng) để chế biến thực phẩm ( như ...

40p lanhuong0993 11-05-2013 135 13   Download

Bài giảng Nông nghiệp sạch tập trung trình bày 10 nội dung gồm: những tài nguyên quan trọng trong trồng trọt định hướng hữu cơ, imo_indigenous microorganism, trừ sâu, giảm lượng phân bón, bẫy rễ dành cho cây ăn trái, phân bón vĩnh cửu, sức khỏe của đất, đệm lót sinh học trong chăn nuôi, mô hình nông nghiệp tuần hoàn và những sai lầm. Mời bạn tham khảo.

24p ngoccthanh 28-06-2022 14 3   Download

The main contents of the dissertation "Between studio and lab: explorations with bacterial cellulose" consist of five main chapters: Chapter 1 bacterial cellulose: fibres secreted by microorganisms; chapter 2 community of practice: situating within biodesign; chapter 3 studio-based experimentation; chapter 4 laboratory-based experimentation; chapter 5 reflections.

172p runthenight04 02-02-2023 7 3   Download

Detection and screening of genes related to biosynthesis of substances with protease inhibitory activity from microorganisms associated with sponge collected from the Mien trung sea of Vietnam by metagenomics method. Then, selective gene, expression of in vitro and determination of activity of the expressed protein.

27p capheviahe26 25-01-2021 18 3   Download

India accounts for 30% of neonatal deaths globally. Bacterial sepsis is a significant cause of morbidity and mortality in newborns. The study helps to make antibiotic policy in neonatal sepsis. The main objective is to study the incidence of multidrug resistant gram negative and gram positive organisms causing neonatal septicemia and their antibiotic sensitivity pattern. The study was conducted in the Department of Microbiology over a period of one year. Sample of blood was collected under aseptic precautions and processed by standard techniques.

5p gaocaolon5 14-06-2020 26 3   Download

Many attempts have been made since 1960th to obtain ester prodrugs of metronidazole active moiety to be used for parenteral forms, with the same action against microorganisms. Until now there is not any ester prodrug marketed for this route of administration.

10p tocectocec 25-05-2020 8 3   Download

The research objective of the thesis is to select microorganisms capable of producing laccase, laccaselike from Ba Vi National Forest area, in herbicide / dioxin contaminated soil at Bien Hoa airport. Assessing the ability of decomposing herbicides containing dioxin and reactive dyes by laccase, laccase-like and VSV strains were selected to guide the application in defense activities.

27p xacxuoc4321 11-07-2019 45 5   Download

Objectives of the thesis: Identifying the Meloidogyne species causing damage on main crops in Tay Nguyen Highlands. Analyze the diversity of Meloidogyne species based on morphology and molecular classification. Assessing the preventative ability of antagonistic microorganisms to Meloidogyne incognita in laboratory condition.

27p xacxuoc4321 08-07-2019 36 5   Download

Choosing microorganisms for industrial microbiology (Lựa chọn vi sinh vật ứng dựng công nghiệp và môi trường) có nội dung trình bày về tìm kiếm VSV trong tự nhiên (Finding Microorganisms in Nature), thao tác di truyền trên vi sinh vật (Genetic Manipulation of Microorganisms), bảo quản vi sinh vật (Preservation of Microorganisms).

39p tranhoaitamcntp 04-05-2014 56 3   Download

The topology of central carbon metabolism ofAspergillus nigerwas identified and the metabolic network reconstruc-ted, by integrating genomic, biochemical and physiological information available for this microorganism and other related fungi. The reconstructed network may serve as a valuabledatabase for annotationof genes identified in future genome sequencing projects on aspergilli. Based on the metabolic reconstruction, a stoichiometric model was set up that includes 284metabolites and335reactions,...

11p tumor12 20-04-2013 27 3   Download

Antimicrobial peptides form one of the first lines of defense against invading pathogens by killing the microorganisms and/ormobilizing the host innate immune system. Although over 800 antimicrobial peptides have been isolated from many different species, especially insects, few have been reported frommarinefish. Sequenceanalysisof twogenomic clones (15.6 and 12.5 kb) from the winter flounder, Pseudopleuronectes americanus(Walbaum) resulted in the identification of multiple clustered genes for novel pleuro-cidin-like antimicrobial peptides....

11p tumor12 20-04-2013 28 2   Download

The dermal glands of frogs produce antimicrobial peptides that protect the skin against noxious microorganisms and assist in wound repair. The sequences of these peptides are very dissimilar, both within and between species, so that the 5000 living anuran frogs may produce
100 000 different antimicrobial peptides.

14p fptmusic 16-04-2013 42 2   Download

Microorganisms produce a large number of pharmaco-logically and biotechnologically important peptides by using nonribosomal peptide synthetases (NRPSs). Due to their modular arrangement and their domain organization NRPSs are particularly suitable for engineering recom-binant proteins for the production of novel peptides with interesting properties.

9p fptmusic 12-04-2013 61 3   Download

In the horseshoe crab, bacterial lipopolysaccharide (LPS) induces exocyto-sis by granular hemocytes, resulting in the secretion of various defense molecules, such as lectins and antimicrobial peptides, via a G protein-mediating signaling pathway. This response is a key component of the horseshoe crab innate immune response against infectious microorganisms. Here, we report an endogenous amplification mechanism for LPS-induced hemocytes exocytosis.

9p fptmusic 11-04-2013 43 2   Download

In both industrial fermenters and in their natural habitats, microorganisms often experience an inhomogeneous and fluctuating environment. In this paper we mimicked one aspect of this nonideal behaviour by imposing a low and oscillating extracellular glucose concentration on nonoscillating suspensions of yeast cells. The extracellular dynamics changed the intracel-lular dynamics – which was monitored through NADH fluorescence – from steady to equally dynamic; the latter followed the extracellular dynamics at the frequency of glucose pulsing....

9p awards 06-04-2013 48 4   Download

Pseudomonas stutzeriOXI is a Gram-negative microorgan-ism able to grow in media containing aromatic hydrocar-bons. A novel lipo-oligosaccharide fromP. stutzeriOX1 was isolated and characterized. For the first time, the pres-ence of two moieties of 4,6-O-(1-carboxy)-ethylidene resi-dues (pyruvic acid) was identified in a core region; these two residues were found to possess different absolute configur-ation. The structure of the oligosaccharide backbone was determined using either alkaline or acid hydrolysis. ...

14p dell39 03-04-2013 45 3   Download

Sponges (phylum Porifera) live in a symbiotic relationship with microorganisms, primarily bacteria. Until now, mole-cular proof for the capacity of sponges to recognize fungi in the surroundingaqueousmilieuhas not beenavailable.Here we demonstrate, for the demospongeSuberites domuncula (Porifera, Demospongiae, Hadromerida), a cell surface receptor that recognizes (1fi3)-b-D-glucans, e.g. curdlan or laminarin. This receptor, the (1fi3)-b-D-glucan-binding protein, was identified and its cDNA analysed.

14p dell39 03-04-2013 37 5   Download

Aryl acid adenylation domains are the initial enzymes for aryl-capping of catecholic siderophores in a plethora of microorganisms. In order to over-come the problem of iron acquisition in host organisms, siderophore bio-synthesis is decisive for virulence development in numerous important human and animal pathogens.

11p dell39 27-03-2013 29 3   Download

Bioremediation strategies use microorganisms to remove hazardous sub-stances, such as aromatic molecules, from polluted sites. The applicability of these techniques would greatly benefit from the expansion of the cata-bolic ability of these bacteria in transforming a variety of aromatic com-pounds.

14p inspiron33 25-03-2013 36 3   Download

The aim of this study was the development of a sensitive and specific substrate for protease A (PrtA), a serralysin-like metzincin from the entomo-pathogenic microorganism,Photorhabdus. First, cleavage of three biological peptides, the A and B chains of insulin andb-lipotropin, and of 15 synthetic peptides, was investigated.

11p galaxyss3 19-03-2013 42 3   Download