Structure and Composition of Xanthomonas pruni Bacteriophage
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منابع مشابه
Regulation of tryptophan pyrrolase activity in Xanthomonas pruni.
Tryptophan pyrrolase was studied in partially purified extracts of Xanthomonas pruni. The dialyzed enzyme required both heme and ascorbate for maximal activity. Other reducing agents were able to substitute for ascorbate. Protoporphyrin competed with heme for the enzyme, suggesting that the native enzyme is a hemoprotein. The enzyme exhibited sigmoid saturation kinetics. Reduced nicotinamide ad...
متن کاملThe niacin-tryptophan relationship in the metabolism of Xanthomonas pruni.
The investigations of Starr (1) demonstrated that Xunthomonas pruni requires an exogenous source of nicotinic acid when grown on a medium containing vitamin-free, acid-hydrolyzed casein, methionine, or glutamic acid to provide an organic form of nitrogen. Preliminary work in this laboratory showed that tryptophan could replace nicotinic acid for growth in a similar medium. This was the first kn...
متن کاملthe underlying structure of language proficiency and the proficiency level
هدف از انجام این تخقیق بررسی رابطه احتمالی بین سطح مهارت زبان خارجی (foreign language proficiency) و ساختار مهارت زبان خارجی بود. تعداد 314 زبان آموز مونث و مذکر که عمدتا دانشجویان رشته های زبان انگلیسی در سطوح کارشناسی و کارشناسی ارشد بودند در این تحقیق شرکت کردند. از لحاظ سطح مهارت زبان خارجی شرکت کنندگان بسیار با هم متفاوت بودند، (75 نفر سطح پیشرفته، 113 نفر سطح متوسط، 126 سطح مقدماتی). کلا ...
15 صفحه اولEffects of leaf wetness duration and temperature on infection of Prunus by Xanthomonas arboricola pv. pruni
Xanthomonas arboricola pv. pruni is the causal agent of bacterial spot disease of stone fruits and almond. The bacterium is distributed throughout the major stone-fruit-producing areas of the World and is considered a quarantine organism in the European Union according to the Council Directive 2000/29/EC, and by the European and Mediterranean Plant Protection Organization. The effect of leaf we...
متن کاملInfluence of agitation and aeration in xanthan production by Xanthomonas campestris pv pruni strain 101.
Production, viscosity, and chemical composition of xanthan synthesized by bacterium Xanthomonas campestris pv pruni strain 101 were evaluated in bioreactor systems. During the process, the volumetric oxygen mass transfer coefficient (k(L)a) and the biomass were determined and the pH was monitored. The cultures were grown in a 3 I bioreactor, with aeration and agitation varying as follows: condi...
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ژورنال
عنوان ژورنال: Journal of General Virology
سال: 1968
ISSN: 0022-1317,1465-2099
DOI: 10.1099/0022-1317-3-1-133