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Brevibacterium frigoritolerans YLX-3 and application thereof

A cold-resistant Brevibacterium, content technology, applied in the direction of bacteria, water/sludge/sewage treatment, biochemical equipment and methods, etc., can solve the problems of unidentified microbial species and characteristics

Inactive Publication Date: 2015-12-09
SUZHOU SETEK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the invention patent did not isolate and purify related selenium-tolerant microorganisms, nor did it identify the species and characteristics of the microorganisms

Method used

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  • Brevibacterium frigoritolerans YLX-3 and application thereof
  • Brevibacterium frigoritolerans YLX-3 and application thereof
  • Brevibacterium frigoritolerans YLX-3 and application thereof

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Effect test

Embodiment 1

[0039] The application of the microorganism described in the invention in the synthesis of organic selenium.

[0040] The microorganism YLX-3 strain of the present invention is inoculated into TSB culture solution containing selenium (sodium selenite configuration) 1.5 mg / L, cultivated at 200 r / min for 48 hours at normal temperature, and the bacteria and supernatant are collected by centrifugation. Then, liquid chromatography-atomic fluorescence spectrometry (LC-GA-AFS) was used to detect the content and form of selenium in the supernatant and bacteria, and the results showed that almost all of the supernatant was Se 4+ , and all of the cells are selenocystine (SeCys 2 )(Table 4). This shows that YLX-3 bacterial strain can under the condition of 1.5mgSe / L, the inorganic selenium (Se 4+ ) into organic selenium (SeCys 2 ) and accumulate in the bacteria. Further collection of thalline can be used as organic selenium addition of animal feed etc., also can do further selenoamin...

Embodiment 2

[0045] The application of the microorganism described in the invention in the synthesis of organic selenium.

[0046] Inoculate the microorganism YLX-3 strain of the present invention into the TSB culture solution containing selenium (sodium selenite configuration) 5 mg / L, cultivate it at 200 r / min for 72 hours at normal temperature, and collect the bacteria and supernatant by centrifugation. Then, liquid chromatography-atomic fluorescence spectrometry (LC-GA-AFS) was used to detect the content and form of selenium in the supernatant and bacteria, and the results showed that almost all of the supernatant was Se 4+ , and most of the bacteria are selenocystine (SeCys 2 ), a small amount of methylselenocysteine ​​(SeMeCys) and Se 4+ (table 5). This shows that YLX-3 bacterial strain can under the condition of 5mgSe / L, the inorganic selenium (Se 4+ ) into organic selenium (SeCys 2 , SeMeCys), and accumulated into the bacteria. Further collection of thalline can be used as orga...

Embodiment 3

[0051] The application of the microorganism described in the invention in the synthesis of nanometer selenium.

[0052] The microorganism YLX-3 bacterial strain of the present invention is inoculated in the TSB culture solution containing selenium (sodium selenite configuration) 10mg / L, and cultivated at 200r / min at normal temperature for 24 hours, and the solution appears obviously red and turbid. After culturing for 48 hours, the cells and supernatant were collected by centrifugation, and it was found that the collected precipitate was a red suspension. Then, using liquid chromatography-atomic fluorescence spectrometry (LC-GA-AFS) and atomic fluorescence spectrometer, it was identified that the composition of the red suspension was almost elemental selenium by subtraction method. The nano-selenium synthesized by the microorganism can be used as a source of selenium supplementation for selenium-deficient people, and can also be used as a selenium fertilizer or an animal feed ...

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Abstract

The invention discloses brevibacterium frigoritolerans YLX-3 separated from a microbial mat sediment in a percolating water system in the selenium mining area of Enshi, Hubei, China and application of brevibacterium frigoritolerans YLX-3. The brevibacterium frigoritolerans YLX-3 is preserved in CCTCC (China Center for Type Culture Collection) with the preservation number of CCTCC No: M2013673. The brevibacterium frigoritolerans YLX-3 has the characteristics of selenium-addicted microbes and has a potential application value in microbial organic selenium conversion, microbial nano-selenium synthesis, selenium-containing ore microbial activation, selenium-rich microbial fertilizer preparation and selenium-contaminated environment remediation.

Description

technical field [0001] The present invention relates to a selenophilic microorganism and its application, in particular to a strain of cold-resistant Brevibacterium frigoritolerans YLX-3 and its use in microbial transformation and synthesis of organic selenium, microbial synthesis of nano-selenium, microbial activation of selenium ore, selenium-rich microbial fertilizer and selenium-polluted environment restoration The application in belongs to the field of biotechnology. Background technique [0002] Extremophiles refer to microbial species suitable for living in extreme environments, including thermophilic bacteria, halophilic bacteria, alkaliphilic bacteria, acidophilic bacteria, barophilic bacteria, psychrophilic bacteria, and radiation-resistant, dry-resistant, and high-concentration metal-resistant bacteria. Ion and extreme anaerobic microorganisms (Rothschild&Mancinelli, 2001; Chen Jun et al., 2006). At present, the research on extremophiles is mainly in areas such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N1/20C12P1/04C12P13/12C12P3/00C05F11/08C02F3/34C12R1/13
Inventor 袁林喜
Owner SUZHOU SETEK
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