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31.
The effect of various organic compounds on the growth of ammonia-oxidizing bacteria was examined.Nitrosococcus oceanus, a strongly halophilic bacterium, had a very low tolerance to organic matter compared with other organisms tested. Organic compounds scarcely affected the growth of theNitrosomonas strains whereas nitrite formation by bothNitrosococcus mobilis strains was inhibited by nearly all of the substances tested. The growth ofNitrosospira strain Nsp1 was enhanced more than 30% by acetate and formate, but not growth was detectable in the presence of pyruvate. On the contrary,Nitrosospira strain Nsp5 was stimulated only by pyruvate. Nitrite formation by the twoNitrosovibrio tenuis strains tested was similar. The growth of both strains was enhanced considerably by formate and glucose; acetate and, to a greater extent, pyruvate inhibited these bacteria.In batch culture, the energy efficiency of autotrophically grown ammonia-oxidizing bacteria varied from strain to strain. The cell yield of mixotrophically grown cultures, per unit of ammonia oxidized, was increased in comparison with autotrophic ones. No heterotrophic growth was detected. 相似文献
32.
M.E. Klem J.L. Kreider P.G. Harms G.D. Potter D.C. Kraemer R.A. Godke 《Prostaglandins & other lipid mediators》1982,24(1):89-96
Thirty-one mares of Quarter Horse and Thoroughbred breeding were utilized in two experiments to evaluate the efficacy of prostaglandin F2α (PGF2α)_for induction of equine parturition and to monitor the effects of this treatment on viability of the resulting foals.Three of five mares given 5 mg PGF2α (im) on day 338 of gestation foaled 19.6 ± 8.2 hr postinjection. In the second experiment immediately following 3 daily injections of 10 mg estradiol cypionate (ECP) given on days 326, 327 and 328 of gestation, seven mares were infused (iv) with PGF2α at the rate of 1.3 mg/hr for 24 hr or until parturition occurred. Four of the seven mares foaled in 8.8 ± 1.8 hr after the start of infusion. Side effects including sweating, hypothermia, increased respiration rate and diarrhea were evident in both injected and infused mares, but effects were transient. Neither the injection, nor infusion route of administration of PGF1α adversely affected the viability of foals. However, some mares induced to foal 12 days prior to expected parturition had foals with slightly weaker pasterns than those of control mares. 相似文献
33.
Summary In touch preparations and tissue sections from normal rat hepatocytes and -amanitine- and actinomycind-poisoned liver cells the extent of chromatin condensation relatively to the degree of ploidy and the chromatin distribution were studied by means of computer aided cytophotometry. It could be found, that the relationship of the condensed and decondensed chromatin is independent of the degree of ploidy and first of all dependent upon the intoxicant. Therefore, the extent of chromatin condensation can be utilized also in sections as additional parameter for automated cell screening.Supported by the Deutsche Forschungsgemeinschaft, Sonderforschungsbereich 105 相似文献
34.
Erik Harms Nathan Gochman Jerry A. Schneider 《Biochemical and biophysical research communications》1981,99(3):830-836
Free (non-protein) amino acids were measured in whole rat liver and in unmodified lysosomes which were prepared from rat liver by the technique of free-flow electrophoresis. Significant intralysosomal pools of threonine, serine, valine, cystine, methionine, isoleucine, leucine, tyrosine, phenylalanine, lysine and arginine were found. No efflux occurred from rat liver lysosomes in isotonic buffered sucrose at 0°C, but all amino acids showed various degrees of efflux at 200 and 370. 相似文献
35.
An ammonia-oxidizing bacterium was isolated from a sample of brackish water (North Sea, Harbour of Husum). It is a motile large coccus 1.5–1.7 m in diameter. The extensive cytomembrane system occurring as flattened vesicles in the peripheral region of the cytoplasm and as intrusions into the center of the cytoplasm is to be emphasized as a characteristic mark of identification. The lithoauto-trophically growing bacterium turned out to be an obligate halophile. Because of its physiological and morphological properties, we assigned it to the genus Nitrosoccus and propose the name Nitrosococcus mobilis. 相似文献
36.
J. Harms 《Helgoland Marine Research》1990,44(3-4):503-506
20 fouling organisms were observed on plastic litter dredged from the Elbe estuary during July 1990; 60% of the species were
typical sessile hard bottom organisms. Most individuals found on this artificial hard bottom were barnacles (Balanus crenatus, Elminius modestus), the musselMytilus edulis and the polychaeteLanice conchilega. All individuals were juveniles which had settled only recently on the plastics. The earliest settlers were not much older
than 4–8 weeks. 相似文献
37.
38.
Brooke Sadler Jackson Wilborn Lilian Antunes Timothy Kuensting Andrew T. Hale Stephen R. Gannon Kevin McCall Carlos Cruchaga Matthew Harms Norine Voisin Alexandre Reymond Gerarda Cappuccio Nicola Brunetti-Pierri Marco Tartaglia Marcello Niceta Chiara Leoni Giuseppe Zampino Allison Ashley-Koch Gabe Haller 《American journal of human genetics》2021,108(1):100-114
39.
Brooke Sadler Jackson Wilborn Lilian Antunes Timothy Kuensting Andrew T. Hale Stephen R. Gannon Kevin McCall Carlos Cruchaga Matthew Harms Norine Voisin Alexandre Reymond Gerarda Cappuccio Nicola Brunetti-Pierri Marco Tartaglia Marcello Niceta Chiara Leoni Giuseppe Zampino Allison Ashley-Koch Gabe Haller 《American journal of human genetics》2021,108(2):368
40.
小麦倒春寒研究现状与进展 总被引:1,自引:0,他引:1
由于全球气候变暖,近年来小麦低温灾害事件频发,尤其是拔节-孕穗期的倒春寒灾害已成为制约小麦产量和品质的重要因素之一。本文综述了小麦倒春寒灾害的发生特点(鉴定与分级、时空特征),倒春寒对小麦生理特性(叶片、茎秆、穗部、根系)和产量、质量的影响,总结了抗倒春寒小麦育种、倒春寒危害的分子生物学机制及灾害的监测预警与风险评估等方面的研究进展,并从小麦抗倒春寒遗传基础、倒春寒危害小麦评价体系和防控技术体系等方面进行了展望,以期为抗倒春寒小麦品种的遗传改良和栽培调控新措施的建立提供理论依据。 相似文献