In Siberian hamsters (Phodopus sungorus), short days suppress reproductive function and lymphocyte proliferation. To determine whether melatonin influences cell-mediated immunity through a direct action on lymphocyte proliferation, in vitro responsiveness to mitogens and melatonin was assessed in systemic and splenic lymphocytes from adult female Siberian hamsters housed in either long or short...

P.Ya. Groisman and G. Gutman (eds.), Regional Environmental Changes in Siberia and Their Global Consequences, Springer Environmental Science and Engineering, DOI 10.1007/978-94-007-4569-8_6, © Springer Science+Business Media Dordrecht 2013 Abstract This chapter considers the current state of Siberian terrestrial ecosystems, their spatial distribution, and major biometric characteristics. Ongoin...

Leaf stomatal characteristics of Siberian elm (Ulmus pumila) were investigated by electron microscopy and white light scanning interferometry. On the basis of average annual precipitations, two types of tree specimens were collected from Korea, China, and Mongolia: (1) trees under normal environmental conditions and (2) trees under arid conditions. Field emission scanning electron microscopy re...

the mediterranean is one of the most important cyclogenesis regions in the northern hemisphere. the depressions occurring in specific areas of the mediterranean region and cyclonic tracks have been the subject of extensive climatological research. the climate of the mediterranean region is conditioned by its position in the transition area between the sub-tropical high pressure belt and the mid...

Male guinea pigs show high susceptibility to Burkholderia mallei and have been used as animal models in glanders studies. The purpose of our study was to elucidate glanders comparative pathogenesis in guinea pigs. We present here the histological changes and bacterial isolation that develop over time in guinea pigs inoculated intraperitoneally (IP) with two strain of B. mallei. Ten male guinea ...

The Siberian sturgeon (Acipenser baerii) is an economically important species. Sturgeon stockassessment during fingerling production is considered to be one of the most difficult phases ofhatchery rearing. The present study investigated the expression of growth hormone (GH)mRNA in unfertilized eggs, fertilized eggs, eyed eggs (2 day before hatching), non-viable eggsand newly-hatched Siberian st...

A 2-year-old female Siberian chipmunk (Tamias sibiricus) was presented to the veterinary clinic for swelling, pain and lameness of the left rear leg. Radiologically, an invasive tumour around the distal femur was suspected, and the leg was surgically amputated and submitted for histopathological diagnosis. Microscopically, the mass was densely packed with multinucleated strap cells that had rou...

Scientists reveal the surprising genetic identity of early human remains from roughly 400,000 years ago in Spain. The bones were first thought to belong to European Neanderthals, but analysis showed they are genetically closer to the Siberian Denisovans. Analysis of the bones challenges conventional thinking about the geographical spread of our ancient cousins, the early human species called Ne...