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The Science of Nature - 相似文献
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Friedrich Schenck 《Die Naturwissenschaften》1937,25(10):159-159
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Complete Degradation of Hexahydro‐1,3,5‐Trinitro‐1,3,5‐Triazine (RDX) by a Co‐Culture of Gordonia sp. KTR9 and Methylobacterium sp. JS178
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The presence of hexahydro‐1,3,5‐trinitro‐1,3,5‐triazine (RDX) in soil and groundwater is a major contamination issue at many military facilities around the world. Gordonia sp. KTR9 metabolizes RDX as a nitrogen source for growth producing 4‐nitro‐2,4‐diazabutanal (NDAB) as a dead‐end product. Methylobacterium sp. strain JS178 degrades NDAB as a sole source of nitrogen for growth. A mixed culture of strains KTR9 and JS178 was able to completely degrade RDX. There was no difference in rate of RDX degradation by KTR9 alone or in co‐culture with JS178. The first‐order degradation coefficients of RDX and NDAB in the co‐culture were 0.08 hr?1 and 0.002 hr?1, respectively. In the co‐culture that initially contained RDX plus NDAB, strain JS178 degraded the NDAB that was produced by KTR9 as shown by a decrease in the molar yield of NDAB (from RDX) from 1.0 to –0.11. Co‐cultures of strains KTR9 and JS178 could be used to promote complete degradation of RDX in soils or groundwater. ©2016 Wiley Periodicals, Inc. 相似文献
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Young M. Noh Detlef Müller Dong H. Shin Hanlim Lee Jin S. Jung Kwon H. Lee Maureen Cribb Zhanqing Li Young J. Kim 《Atmospheric environment (Oxford, England : 1994)》2009,43(4):879-888
Aerosol optical and microphysical parameters from severe haze events observed in October 2005 at Gwangju, Korea (35.10°N, 126.53°E) were determined from the ground using a multi-wavelength Raman lidar, a sunphotometer, and a real-time carbon particle analyzer and from space using satellite retrievals. Two different aerosol types were identified based on the variability of optical characteristics for different air mass conditions. Retrievals of microphysical properties of the haze from the Raman lidar indicated distinct light-absorbing characteristics for different haze aerosols originating from eastern and northern China (haze) and eastern Siberia (forest-fire smoke). The haze transported from the west showed moderately higher absorbing characteristics (SSA = 0.90 ± 0.03, 532 nm) than from the northern direction (SSA = 0.96 ± 0.02). The organic/elemental carbon (OC/EC) ratio varied between 2.5 ± 0.4 and 4.1 ± 0.7. 相似文献
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Successful outcome following prenatal intervention in a female fetus with bladder outlet obstruction
Eui Jung Hye-Sung Won Jae-Yoon Shim Pil Ryang Lee Ahm Kim Kun Suk Kim 《黑龙江环境通报》2005,25(12):1107-1110
Bladder outlet obstructions are a diverse and heterogeneous group of developmental abnormalities that generally involve obstruction of the proximal urethra in the male fetus. Indications for prenatal intervention are few and are usually restricted to the male fetus because bladder outlet obstruction in female fetuses is usually caused by complex cloacal development anomalies. We report on a female fetus with an enlarged bladder and a dilated proximal urethra (known as typical keyhole sign). A vesicoamniotic shunt was performed despite non-reassuring prognostic factors, but the procedure resulted in a successful outcome. We propose that in selected cases of bladder outlet obstruction, fetal intervention should be considered even when the fetus is female. Copyright © 2005 John Wiley & Sons, Ltd. 相似文献