We investigate whether the recent slow-down of Whillans Ice Stream (WIS),West Antarctica, may lead to its complete stoppage in the near future, using a numerical model. Basal resistance to ice-stream motion is represented by a continuous till layer whose strength changes in response to basal melting and freezing.We implement a basal drainage system, which acts to hinder ice-stream stoppage thro...

The slow-freezing method is widely used to freeze human oocytes, both for fertility preservation and in routine IVF programmes. Slow freezing damages some of the cell's structures, including the meiotic spindle (MS) and the zona pellucida (ZP). Polarized light microscopy was used to study the variations induced by slow freezing on the MS and the ZP of human oocytes and to analyse the relationsh...

Heparinized whole blood, parasitized with Aegyptianella pullorum, was collected from 2 fowls. Buffered lactose peptone (BLP) was added v/v as a stabilizer and the mixture lyophilized in 2 ml aliquots after rapid or slow freezing. At different stages during the freeze-drying process, as well as after lyophilization and reconstitution with 1.8 ml of sterile water, samples were taken and injected ...

Ultracold atoms are still too hot. This may seem a ridiculous claim—after all, the low-temperature exploits of the purveyors of quantum gases are notorious. Laser cooling can flash-freeze atoms to temperatures in the microand nanokelvin range. In the mid 1990s, researchers followed this with evaporative cooling of atoms out of shallow traps and made the first gaseous Bose-Einstein condensates a...

The influence of water on the interaction between iron(III) and indole-3-acetic acid (IAA) was studied in different organic solutions using rapid-scan stoppedflow spectrophotometry and rapid-freeze/quench Mössbauer spectroscopy. Measurements were also performed in ethanol– water and acetone–water mixtures. The results showed that the interaction between Fe and IAA resulted in dimeric Fe–IAA com...

this study was conducted to evaluate the effects of freeze-thaw cycles on some quality parameters of silver carp fillets. the prepared fillets were packaged in zip lock bags and were subjected to 0, 1, 2, 3, 4 and 5 freeze-thaw cycles, respectively. heme iron content decreased, and dry matter increased as the number of freeze-thaw cycles increased (p

conclusions employing the lpe as a new approach, gives novel concept of probiotic-products in food and medical marketing. results results showed that, lpe had more antipathogenic effects, antioxidant activity, and stability during storage-time when compared to fresh probiotic-extract. objectives in this study extract of cultured probiotics without cells was evaluated for its antimicrobial effec...

the aim of this study was to determine the effect of low levels of glutathione on post-thawed buck sperm quality. in this experiment, different concentrations of glutathione [0 (lg-0), 0.5 (lg-0.5), 1 (lg-1), 1.5 (lg-1.5), and 2 (lg-2) mm] were added in a soybean lecithin-based extender. a total of 16 ejaculates from four bucks were collected and pooled. each pooled sample was divided into five...

Waste tires, rubbers, plastic and steel materials, normally produced in every society, enter the environment and cause serious problems. These problems may, to some extent, be reduced by finding applications for them in engineering, for example, they can be used for geotechnical applications as backfill material and solving problems with low shear strength soils. Such materials may be subjected...

background black pepper (piper nigrum) is one of the well-known spices extensively used worldwide especially in india, and southeast asia. the presence of alkaloids in the pepper, namely, piperine and its three stereoisomers, isopiperine, chavicine and isochavicine are well noticed. objectives the current study evaluated the effect of lyophilization and oven drying on the stability and decompos...