نتایج جستجو برای: east and central africa

تعداد نتایج: 16930528  

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2015
Hans Bauer Guillaume Chapron Kristin Nowell Philipp Henschel Paul Funston Luke T B Hunter David W Macdonald Craig Packer

We compiled all credible repeated lion surveys and present time series data for 47 lion (Panthera leo) populations. We used a Bayesian state space model to estimate growth rate-λ for each population and summed these into three regional sets to provide conservation-relevant estimates of trends since 1990. We found a striking geographical pattern: African lion populations are declining everywhere...

دلشاد, حسین, ستاری , محمود, محمودی , سعید,

The term “inflammatory” bowel disease” applies to idiopathic, chronic inflammatory bowel disease (IBD): Crohn’s disease and ulcerative colitis. They occur among all age groups but a peak incidence in the second and third decades. Most of IBD occur as ulcerative colitis, but the incidence of Crohn’s disease has risen over the past 20 years. These disorder ar...

Journal: :The Journal of general virology 2015
Basavaprabhu L Patil James P Legg Edward Kanju Claude M Fauquet

Cassava brown streak disease (CBSD) has emerged as the most important viral disease of cassava (Manihot esculenta) in Africa and is a major threat to food security. CBSD is caused by two distinct species of ipomoviruses, Cassava brown streak virus and Ugandan cassava brown streak virus, belonging to the family Potyviridae. Previously, CBSD was reported only from the coastal lowlands of East Afr...

2015
Olusegun Steven Ayodele Oluwole

Meningococcal meningitis is a major public health problem that kills thousands annually in Africa, Europe, North, and South America. Occurrence is, however, highest during the dry seasons in Sahel Africa. Interannual changes in precipitation correlate with interannual changes in El Niño-Southern Oscillation (ENSO), while interdecadal changes in precipitation correlate with Pacific Decadal Oscil...

2005
Helena Hervius Askling Jenny Nilsson Anders Tegnell Ragnhild Janzon Karl Ekdahl

Imported malaria has been an increasing problem in several Western countries in the last 2 decades. To calculate the risk factors of age, sex, and travel destination in Swedish travelers, we used data from the routine reporting system for malaria (mixture of patients with and without adequate prophylaxis), a database on travel patterns, and in-flight or visa data on Swedish travelers of 1997 to...

Journal: :journal of rangeland science 2013
victor r squires neymatolla safarov

tajikistan is a hotspot of plant and animal species diversity and endemism andis important for the conservation of biodiversity on a global scale. the country is located ata biological crossroads. species from central and northern europe, central asia, themiddle east, and north africa mingle here with endemics found nowhere else. therichness of tajikistan‘s biodiversity shows up at the genetic,...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علامه طباطبایی - دانشکده ادبیات و زبانهای خارجی 1389

در طول دو قرن گذشته و ظهور روسیه بعنوان قدرتی بزرگ در عرصه جهانی و شروع رقابت با سایر قدرت های بین المللی و منطقهای خصوصا با ایران و عثمانی این ئکشور تلاش کرده است تاد از جمعیت کردها در این کشورها در راستای منافع خود بهره برداری کند در قرون 18 و 19 بارها بخشی از کردها برعلیه امپراطوری عثمانی توسط این کشور مورد استفاده قرار گرفت خصوصا در جنگ های سال 1790تا 1798. این ججنگ ها م.جب شد که بخشی از کر...

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