Search

Copyright of South China Fisheries Science is the property of South China Fisheries Science Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Guangxi Normal University - Natural Science Edition is the property of Gai Kan Bian Wei Hui and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Environmental Science & Technology (10036504) is the property of Editorial Board of Environmental Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Henan University of Science & Technology, Natural Science is the property of Editorial Office of Journal of Henan University of Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Mycosystema is the property of Mycosystema Editorial Board and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Henan Agricultural Sciences is the property of Editorial Board of Journal of Henan Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Environmental Science & Technology (10036504) is the property of Editorial Board of Environmental Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

[Objective] The strains that have antagonistic effects on the pathogens of Anoectochilus stem rot screened from biological samples from marine sources, and their biological control capabilities were studied to provide a theoretical basis for the development of corresponding biocontrol bacteria preparations. [Method] A variety of test media were used to isolate and purify strains from coral samples in Dongshan Coral Nature Reserve, Fujian Province through the dilution coating method. The colony confrontation test was used to screen out the strains with obvious inhibitory effect on the pathogen of Anoectochilus stem rot. According to the morphological characteristics of the strain and the sequence analysis of the rDNA-ITS region, its classification status was clarified. Then the plate confrontation test, GC-MS and growth rate method were used to verify and determine the biocontrol ability of the strain against the pathogen of Anoectochilus stem rot. [Result] A strain of Penicillium oxalicum HY181-2 with antagonistic effect on the pathogen Fusarium o-rysporum JXL of Anoectochilus stem rot was isolated. In order to eliminate the competitive influence of colony growth, a small amount of fermentation test was performed on HY181-2 to obtain fermentation extracts. GC-MS analysis results showed that the fermentation extract of strain HY181-2 has antioxidant and antibacterial effects. Meanwhile, the mycelial growth rate method was used to compare and analyze the inhibitory effect of strain HY181-2 fermentation extract and four fungicides on F. oxysporum JXL The laboratory virulence test results showed that, compared with the other four chemical fungicides, the fermentation extract of strain HY181 -2 had not the best inhibitory effect on the hyphae of strain JXL at the same concentration. But with the increase of the concentration, the fermentation extract of strain HY181-2 still had a significant inhibitory effect on the mycelium of strain JXL When the concentration was 100 mg/L, the fermentation extract of strain HY181-2 couldinhibit the hyphae of strain JXL as high as 85. 03 % . [Conclusion] Taking the virulence index as an indicator, the effect of the fermentation extract of strain HY181-2 in the indoor virulence determination test was second only to 10% difenoconazole, with an EC50 value of 2. 72 mg/L However, the fermentation extract of strain HY181-2 was derived from the growth and metabolism of microorganisms. Compared with chemical fungicides, it was safe, healthy and free of pesticide residues, and it can be continuously obtained with the growth of microorganisms. And the strain HY181-2 also had the unique characteristics of rapid growth of biocontrol bacteria If the strain HY181-2 was developed into a cor- responding microbial preparation and applied to actual production, it will not only reduce the use and frequency of chemical pesticides, further reduce pesticide residues, but also reduce the production costs of growers. Therefore, this research lays the foundation for the development and utilization of marine Penicillium oxalicum HY181-2 as a biocontrol agent. [ABSTRACT FROM AUTHOR]

Copyright of Acta Edulis Fungi is the property of Acta Edulis Fungi and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Henan Agricultural Sciences is the property of Editorial Board of Journal of Henan Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

To clarify the cause of castor bean bud rot, pathogenic strains were isolated by tissue isolation and tested for pathogenicity. Classification status of the pathogens were determined by ITS-PCR combined with morphological identification. Results showed that RFR1-4 isolated from the disease samples, was confirmed to be the pathogen according to Koch's rule. It was identified as Fusarium solani by morphological characteristics. By ITS analysis, EF1-α and β-tubulin sequences revealed a 100% identity with F. solani species complex by polyphasic identification of FUSARIUM-ID database. Therefor, the pathogenic strain (RFR1-4) was identified to be a member of F. solani species complex which caused castor bean bud rot. [ABSTRACT FROM AUTHOR]

Copyright of Shipin Kexue/ Food Science is the property of Food Science Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Oil Drilling & Production Technology / Shiyou Zuancai Gongyi is the property of Shiyou Zuancai Gongyi Bianjibu and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Tyrosine is an important aromatic amino acid. Besides its nutritional value, tyrosine is also an important precursor for the synthesis of coumarins and flavonoids. Previously, our laboratory constructed a Saccharomyces cerevisiae strain LTH0 (ARO4K229L, ARO7G141S, Δaro10, Δzwf1, Δura3) where tyrosine feedback inhibition was released. In the present study, heterologous expression of betaxanthins synthesis genes DOD (from Mirabilis jalapa) and CYP76AD1 (from sugar beet B. vulgaris) in strain LTH0 enabled production of yellow fluorescence. The engineered strain LTH0-DOD-CYP76AD1 was subjected to UV combined with ARTP mutagenesis, followed by flow cytometry screening. Among the mutants screened, the fluorescence intensity of the mutant strain LTH2-5-DOD-CYP76AD1 at the excitation wavelength of 485 nm and emission wavelength of 505 nm was (5 941±435) AU/OD, which was 8.37 times higher than that of strain LTH0-DOD-CYP76AD1. Fourteen mutant strains were subjected to fermentation to evaluate their tyrosine producing ability. The highest extracellular tyrosine titer reached 26.8 mg/L, which was 3.96 times higher than that of strain LTH0-DOD-CYP76AD1. Heterologous expression of the tyrosine ammonia lyase FjTAL derived from Flavobacterium johnsoniae further increased the titer of coumaric acid to 119.8 mg/L, which was 1.02 times higher than that of the original strain LTH0-FjTAL.

Two cases of critical nosocomial pneumonia caused by flavobacterium meningosepticum (FM) were reported and both of them were successfully cured. There were 2 other cases of FM pneumonia reported in Chinese literature previously, but none of them survived. It has been found that the treatment for FM respiratory infection was very difficult because of its resistance to majority of antibiotics, including the third generation cephalosporins. The symptoms of FM pneumonia are similar to those of other gram-negative bacillus pneumonias, such as Klebsiella pneumoniae pneumonia. Definite diagnosis depends principally on etiological examination and clinical manifestations of pneumonia. Cefoperazone, Cefsulodin, Astreonam and Ciprofloxacin are valuable drugs in saving the lives of patients with FM Pneumonia.

From January 1981 to December 1988, we collected 11 cases of neonatal meningitis caused by Flavobacterium meningosepticum. The 6 male and 5 female newborns ranged from 3 days to 20 days old. Birth body weight varied from 1100 gm to 3600 gm. Seven cases were premature or small for date. Nosocomial infection was noted in 7 of these 11 cases. Clinically, lethargy and poor activity were the most common symptoms. Cyanosis, fever and convulsion were the next. There were 9 cases showing pleocytosis, increased protein and decreased glucose level in the cerebrospinal fluid examination. The organisms isolated in all 11 cases were susceptible to piperacillin, resistant to ampicillin, aminoglycosides and cephalosporin. Five patients were treated with antibiotics other than piperacillin for 5 to 18 days. Three patients died; hydrocephalus was the cause of death in 2 of them. Two patients were discharged against advice. Among the remaining 6 cases we gave piperacillin for 3 weeks, one case developed hydrocephalus but eventually succumbed to K. pneumoniae sepsis. Out of five surviving cases, 3 developed hydrocephalus (VP shunt performed in two). The other two patients were discharged without neurological deficit. In conclusion, neonatal Flavobacterium meningosepticum meningitis was more frequent in premature or small for date babies, and it usually appeared in nosocomial infection. The prognosis was poor and piperacillin was proved to be the drug of choice.