نتایج جستجو برای: bacterium ex
تعداد نتایج: 106953 فیلتر نتایج به سال:
conclusions the findings of the current study indicate that at high concentrations of salt, the growth of bacteria reduces so that it stops at a concentration of 50 mg l-1 (5%). thus, the bacterium is halotolerant or halophilic. with an increase in phenol concentration, the growth rate increased. phenol toxicity appears at a concentration of 600 mg l-1. results the phenol concentration of 600 m...
Arcanobacterium haemolyticum (ex MacLean et al. 1946) Collins et al. 1983 is the type species of the genus Arcanobacterium, which belongs to the family Actinomycetaceae. The strain is of interest because it is an obligate parasite of the pharynx of humans and farm animal; occasionally, it causes pharyngeal or skin lesions. It is a Gram-positive, nonmotile and non-sporulating bacterium. The stra...
The role of the skin microbiota in human health is poorly understood. Here, we identified and characterized a novel antioxidant enzyme produced by the skin microbiota, designated RoxP for radical oxygenase of Propionibacterium acnes. RoxP is uniquely produced by the predominant skin bacterium P. acnes, with no homologs in other bacteria; it is highly expressed and strongly secreted into culture...
Macrophages are essential for systemic iron recycling, and also control iron availability to pathogens. Iron metabolism in mammalian cells is orchestrated posttranscriptionally by iron-regulatory proteins (IRP)-1 and -2. Here, we generated mice with selective and combined ablation of both IRPs in macrophages to investigate the role of IRPs in controlling iron availability. These animals are hyp...
کتان سفید (linum album ky. ex boiss.) گیاهی از تیره کتان و اندمیک ایران است. به منظور بررسی تنوع ژنتیکی این گیاه با استفاده از صفات مورفولوژیکی و ترکیب های اسید چرب، 11 جمعیت از این گیاه در استان همدان انتخاب شد. در بهار و تابستان سال 1393 از هر یک از جمعیت های مورد نظر در فصل گلدهی و در زمان رسیدن بذر، پنج نمونه گیاهی کامل به طور تصادفی انتخاب و اندازه گیری های کمّی (33 صفت) و کیفی (9 صفت) برای...
The victory of Viktor Yanukovych in the second round of Ukraine’s 2010 presidential election has been widely portrayed as a rebuke of the 2004 Orange Revolution and the pro-Western alignment it ushered in. Even before the election, however, the effects of the Eurasian color revolutions, celebrated with such euphoria in some Western foreign policy circles in the mid-2000s, had far-reaching and u...
Credit card default losses increased dramatically in the 80s and 90s, from 3% to over 5% of outstanding debt. We explore whether technological progress in debt collection is behind this change by developing a new theory featuring costly state verification with signals. We motivate our approach by the predominance of informal bankruptcy in the credit card market, which necessitates the costly in...
Once there was a time when mainframes walked the earth and reigned supreme over all the land. Lowly users were far too unclean and unschooled to commune with these vastly superior beings made of silicon and software, and so there arose among us a programming priesthood who served as intermediaries between human and machine. Like the monks of old, who studiously labored over the production of el...
Automation is “the application of machines to tasks once performed by human beings, or increasingly, to tasks that would otherwise be impossible”, Encyclopaedia Britannica [1]. The term automation itself was coined in the 1940s at the Ford Motor Company. The idea of automating processes and systems started many years earlier than this as part of the agricultural and industrial revolutions of th...
Introduction It is a great pleasure to be here in Oslo, nearly 30 years after I was awarded the Nobel Peace Prize. I wish to thank the Norwegian Nobel Institute and the U.S. Embassy in Norway for arranging this lecture. Today, I am here to take stock of the contributions of the so-called “Green Revolution,” and explore the role of science and technology in the coming decades to improve the quan...
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