background: cryopreservation and in vitro maturation (ivm) of oocyte is becoming an important technique in infertility treatment and fertility preservation. also it has been proposed to establish a genetic resource bank for endangered or commercially important animal species. objective: the aim of this study was to evaluate viability, maturation and fertilization rate of mouse immature oocytes ...

Intense gully erosion has sculptured remarkable channels into the Moldavian Plateau of eastern Romania, especially in its most representative subunit, Bârlad covering >8000 km2. The permanent types are: (1) discontinuous gullies, mostly located on hillslopes and (2) large continuous gullies valley bottoms. This study seeks to improve our understanding development over variable time-scales (most...

Urbanization in stream catchments can have strong effects on channel hydrogeomorphic features including dimensions, channel-floodplain connectivity, and flood regime. However, the consequences of alterations aquatic-terrestrial subsidy dynamics are largely unexplored. We examined associations among characteristics, emergent aquatic insect assemblages, density trophic riparian spiders family Tet...

the aim of conducting this research was to evaluate the viscosity change in the continuous casting of steel moldpowders by altering their chemical compositions, using hot stage microscope analysis. 4 low-fluorine samplescontaining such compositions as mno, fe2o3, li2o, tio2 and zno, as well as another fluorine-free samplecontaining a combination of fe2o3 and tio2, were prepared in this research...

arginine (arg) requirements of male broilers (ross 308) reared at high altitude (2100 mabove sea level) during the 1-to 3-week period was estimated in a graded supplementationmethod, in which six diets (230 g kg-1 cp and 3200 kcal me kg-1) with arg increments of1.25 g kg-1 were applied to four pens of fifteen birds each. dietary arg content of theexperimental groups ranged from 10 g kg-1 (80% o...

The Qinghai-Tibetan Plateau, known as the world’s “third pole”, is home to several large rivers in Asia. Its geomorphology exceptionally vulnerable climate change, which has had a significant impact on historical riverbed development through runoff and sedimentation processes. However, there limited research combining sedimentology, chronology with river dynamics investigate evolution patterns ...

Abstract Background Altered hydrology is a stressor on aquatic life, but quantitative relations between specific aspects of streamflow alteration and biological responses have not been developed statewide scale in Minnesota. Best subsets regression analysis was used to develop linear models that quantify among five categories hydrologic metrics (i.e., duration, frequency, magnitude, rate-of-cha...

Alluvial landscapes have long been considered optimal locations for Neolithic settlement because of the availability water and nutrient-bearing silts. However, dynamics these often underestimated in relation to interactions precipitation, temperature vegetation at catchment scale, along with flow geomorphic processes channel adjacent areas. In this paper we employ a multi-method approach model ...

The Lena, a large river that drains the northern coldest region of Northern Hemisphere, is deeply influenced by continuous permafrost and degradation frozen ground has been shown to be main cause marked increase in water discharge. first objective this study conducted on middle Lena was analyze island dynamics for last 50 years (1967 2017). Several morphological parameters were surveyed using G...