[Results]The centralized air ventilation system is seriously polluted in which the qualified rate of the content of dust was only 14.4%. The qualified rate of the total content of bacterium was 38.9%. The qualified rate of the total content of fungus was 41.1%.
When the concentration of hydroxyl solution is 0.6 mg/L, it is only in 2.67 seconds that the rate of killing phytoplankton, zooplankton and bacterium attains to 100% .
From 1987 to1993,through the appreciation of germ total number and large intestinecolon bacillus of 101 potable natural mineral water samples in 50 mineral water places,thereare 64 qualified ones among them,the qualified rate is 63.37%。
Methods CO,CO2 dusts ana total germ of the air were measured in some house form relative pol- lution-region(in the center of Guiyang) and clean - region acoording to the random sample.
every surveillant index in the relative pollution-region were higher than the clean-region (p < 0.05). CO index of both area and total germ of pollution - region were above the relative clean air value.
Methamidophos-degrading bacteria strain D and strain J were able to utilize methamidophos as the carbon and energy source for growth. Strain D and strain J were cultivating 72 hours in basic culture medium with 500mg/L methamidophos and shaking (180r/min) at 30℃, methamidophos was degraded 58.49% and 65.80% respectively.
A heavy metal-resistant bacteria strain named Bacillus thuringiensis subsp. cameroun 4AF1 was screened from 77 known Bacillus strains. The minimum inhibitory concentration (MIC) of 4AF1 to Co~(2+)、Ni~+、Cu~(2+)、Zn~(2+) were 277.2 mM, 109.4 mM, 124.0 mM, and 51.1 mM, respectively.
从77种芽孢杆菌中筛选出的杀虫细菌苏云金杆菌4AF1,其耐受重金属的最低抑制浓度(minimum inhibitory concentration,MIC)分别为:Cu2+ 124.0 mM、Co2+ 277.2 mM、Zn2+51.1mM、Ni+ 109.4 mM.
The results will certainly supply useful reference for building up alert index systems in paddy soil polluted by phenanthrene, for environmental quality evaluation and for the using of phenanthrene-degrading bacteria strain.
The pharmaceutical sciences are advancing rapidly in the post-genomic era of the 21st century with the completion of the human genome, as well as those of many other organisms including bacteria and parasites, and the rapid advances in proteomics.
The aqueous and solvent extracts when tested against 11 gram-negative and 2 gram-positive bacteria and 3 fungi expressed activity to most of the organisms.
Aqueous and organic solvent extracts tested by agar-well diffusion method against 12 human pathogenic bacteria and 3 fungal strains showed activity to most of the organisms.
These new synthesized compounds evaluated for their antibacterial activities against Gram-positive and Gram-negative bacteria using the tube dilution method.
All the four altered proteins were responsible for bacterial stress, but cryptocyanin seemed to be a memory response protein against the challenge by a live bacterium after immunization of the live cells.
The kinetics of formation of iron-containing minerals by thermophilic dissimilatory iron-reducing bacteria (strain Z-0001) under controlled laboratory conditions has been investigated by M?ssbauer spectroscopy.
Via direct dilution of mud samples in defined reduced media supplemented with trimethoxybenzoate or syringate two new strains of anaerobic homoacetogenic bacteria (strain TMBS4 and strain SA2) were obtained in pure culture.
In contrast, when heat-killed bacteria strain IFO3455 or living bacteria of the non-elastase-producing strain PA103 were injected, ring abscess was not induced.
Furthermore, when living bacteria strain IFO3455 were injected with anti-elastase antibody or a protease inhibitor, ovomacroglobulin, ring abscess formation was significantly inhibited.
The presence of anti-elastase antibody or a specific elastase inhibitor facilitated PMN migration towards living bacteria strain IFO3455 in an in vitro model.
The mixed wastewater of trinitrotoluene-dinitronaphthalene was under microaerophilic-aerobic two-stage treatment by screening strains Citrobaoter, Bacillus, Enterbaeter and Escherchia. The equipment was designed .and fabricated in the Institute. Most of the toxicants have been removed at the microaerophilic stage, while the rest as well as the remaining COD and BOD removed satisfactorily at the aerobic stage.
Leaching of vanadium presented in rock coal by Thiobadllus thiooxidans or T.ferrooxidans,including its extent,mechanism and affecting factors,was studied,recovering of vanadium from the leacheate also done.The results are shown as follows;1.By using calcium carbonate as an additive to burn rock coal,the rate of leaching of vanadium from the cinder by T.thiooxidans increased to 86%;While with no additive to burn rock coal,the rate of leading was only about 20%.It has been determined that,after having been bu...