نتایج جستجو برای: freeze concentration
تعداد نتایج: 396382 فیلتر نتایج به سال:
In the present study, a suitable drying method was developed for citrus press cakes (CPCs), which are produced as a by-product in citrus juice plants, and the protective effect of methanol extract of CPCs prepared by far-infrared radiation (FIR) drying against H(2)O(2)-induced DNA damage was evaluated versus that of freeze-dried CPCs. Methanol extract of FIR-dried CPCs exhibited comparatively g...
We studied the effects of pH and solution additives on freezing-induced perturbations in the tertiary structure of a monoclonal antibody (mAb) by intrinsic tryptophan fluorescence spectroscopy. In general, freezing caused perturbations in the tertiary structure of the mAb, which were reversible or irreversible depending on the pH or excipients present in the formulation. Protein aggregation occ...
Various marine fishes, amphibians, and reptiles survive at temperatures several degrees below the freezing point of their body fluids by virtue of adaptive mechanisms that promote freeze avoidance or freeze tolerance. Freezing is avoided by a colligative depression of the blood freezing point, supercooling of the body fluids, or the biosynthesis of unique antifreeze proteins that inhibit the pr...
BACKGROUND Circulating RNA in plasma/serum is an emerging field for noninvasive molecular diagnosis. Because RNA is widely thought to be labile in the circulation, we investigated the stability and various preanalytical factors that may affect RNA concentrations in blood specimens. METHODS Blood samples were collected from 65 healthy volunteers. The effects of two preanalytical variables were...
Advances in the "omics" field bring about the need for a high number of good quality samples. Many omics studies take advantage of biobanked samples to meet this need. Most of the laboratory errors occur in the pre-analytical phase. Therefore evidence-based standard operating procedures for the pre-analytical phase as well as markers to distinguish between 'good' and 'bad' quality samples takin...
In order to study the effect of freezing and thawing liquid nitrogen on mechanical seepage characteristics coal rock with different water content values, conventional triaxial loading tests freeze–thawed samples values were carried out using non-contact digital image processing technology. The research results showed that same content, peak strength a sample was smaller than non-freeze–thawed s...
Natural and artificial materials including rocks and cement-based materials such as concrete and cement mortar are affected both physically and chemically by various natural factors known as weathering factors. The freeze-thaw process, as a weathering factor, considerably affects the properties of rocks and concrete. Therefore, the effect of the freeze-thaw process on the physical and mechanica...
We assessed the metal-accumulating ability of the shrimp Penaeus indicus for Nickel (Ni) in 2008. Shrimps were seasonally (autumn and winter) collected from Jask coastal area, East of Hormuzgan province in the Persian Gulf. The samples were washed with seawater and dried with the help of freeze dryer and digested using a microwave digester in a super-pure nitric acid solution. The Nickel concen...
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