نتایج جستجو برای: heat arrested method

تعداد نتایج: 1815628  

Journal: :global analysis and discrete mathematics 0
hassan dana mazraeh school of mathematics and computer science, damghan university, p.o. box 36715-364, damghan, iran.

in this paper, a numerical solution of an inverse non-dimensional heat conduction problem by spline method will be considered. the given heat conduction equation, the boundary condition, and the initial condition are presented in a dimensionless form. a set of temperature measurements at a single sensor location inside the heat conduction body is required. the result show that the proposed meth...

Journal: :Cell structure and function 1991
S C Kaul G R Sapra

Fine structural observations on heat shocked cells of S. mytilus reveal that cell organelles undergo structural alterations. Mitochondria show distorted shapes with disorganized cristae and vacuolar spaces. Pulse heat shock results in dilated rough endoplasmic reticulum, abundant polysomes as well as smooth endoplasmic reticulum. Heat shocked cells show membrane bound bodies containing osmiophi...

Journal: :The Plant cell 1989
J L Zimmerman N Apuya K Darwish C O'Carroll

We have determined that somatic embryos of carrot exhibit a number of interesting and unusual properties when exposed to heat shock at different times in their development. Specifically, we have seen that mid-globular embryos can be arrested irreversibly in their development when heat-shocked, whereas all other stages of embryogenesis, both before and after this stage, are fully capable of norm...

Journal: :international journal of reproductive biomedicine 0
forouzan absalan mansoureh movahedin seyed javad mowla

background: in most mammals, the testis is always maintained at a lower temperature than that in the abdomen, and exposure of the testis to body temperature causes degeneration of germ cells. objective: in this research, the long effect of heat exposure on sperm parameters and microstructure of mouse testis were investigated. cryptorchid mouse were induced by exposure to abdominal heat. materia...

Journal: :Anticancer research 2008
Chong-Zhi Wang Han H Aung Bin Zhang Shi Sun Xiao-Li Li Hui He Jing-Tian Xie Tong-Chuan He Wei Du Chun-Su Yuan

BACKGROUND Former studies have shown that extract from American ginseng (Panax quinquefolius) may possess certain antiproliferative effects on cancer cells. In this study, the chemical constituents of both untreated and heat-processed American ginseng and their antiproliferative activities on human breast cancer cells were evaluated. MATERIALS AND METHODS American ginseng roots were steamed a...

Journal: :Nature Structural & Molecular Biology 2012

2002
ELISABETH MULLER JACQUES SCHNEIDER RICHARD SCHINDLER

A heat-sensitive (hs, arrested at 39.5°C, multiplying at 33°C) and a cold-sensitive (cs, arrested at 33°C, multiplying at 39.5°C) cell cycle variant were isolated from an undifferentiated P-815 murine mastocytoma line. At the respective nonpermissive temperature, both the hs and the cs variant cells were reversibly arrested with a DNA content, typical of GI phase. The cells of two cs variant su...

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