نتایج جستجو برای: biological effect of laser radiation

تعداد نتایج: 21281389  

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2015
Thomas Heinzl Chris Harvey Anton Ilderton Mattias Marklund Stepan S Bulanov Sergey Rykovanov Carl B Schroeder Eric Esarey Wim P Leemans

We propose a new method of detecting radiation reaction effects in the motion of particles subjected to laser pulses of moderate intensity and long duration. The effect becomes sizable for particles that gain almost no energy through the interaction with the laser pulse. Hence, there are regions of parameter space in which radiation reaction is actually the dominant influence on charged particl...

Journal: :iranian journal of radiation research 0
gh. haeri ent of medical physics, faculty of medical sciences, tarbiat modares university, tehran, iran h. rajabi department of medical physics, faculty of medical sciences, tarbiat modares university, tehran, iran sh. akhlaghpoor department of radiology, sina hospital, tehran university of medical science, tehran, iran

background: finding a suitable method for rapid, accurate and reliable estimation of absorbed dose has high priority in management of the radiation exposed persons. shortly after radiation exposure, apoptosis is a major detriment in proliferative tissues such as the hematopoietic system. therefore, quantification of apoptosis in these tissues could be useful for rapid estimation of radiation ex...

Journal: :Clinical chemistry 1985
M J Sepaniak

Many areas of spectroscopy have benefited from the use of laser radiation sources. I present a discussion of the basic properties of the laser and how these properties can be advantageous when laser excitation is used in fluorometry. Although the laser has not yet been accepted as a routine instrument in the clinical laboratory, its unique properties have rendered it useful in several analytica...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان 1390

during natural gas processing, water in natural gas may cause to hydrates formation in pipelines which may lead to serious damages to process equipments. given the problems raised by present of water in natural gas, glycol solvent uses to remove water.in contact of glycol with gas always an amount of btex and voc absorb along with water, which on glycol recovery process, these substances separa...

پایان نامه :دانشگاه تربیت معلم - تهران - دانشکده ادبیات و علوم انسانی 1392

in this study, the relationship between teachers’ creative and critical thinking skills and their reflectivity in teaching was investigated. to this end, three questions were raised. these questions were intended to determine whether there was a significant relationship between teachers’ creative thinking skills and their reflectivity in teaching; whether there was a significant relationship be...

Journal: :Physical review letters 2016
Victor Dinu Chris Harvey Anton Ilderton Mattias Marklund Greger Torgrimsson

We investigate quantum radiation reaction in laser-electron interactions across different energy and intensity regimes. Using a fully quantum approach which also accounts exactly for the effect of the strong laser pulse on the electron motion, we identify in particular a regime in which radiation reaction is dominated by quantum interference. We find signatures of quantum radiation reaction in ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1391

we have two part in this thesis, at first: the interaction of native calf thymus dna (ct-dna) with two anthraquinones including quinizarin (1,4- dihydroxy anthraquinone) and danthron (1,8- dihydroxy anthraquinone) in a mixture of 0.04 m brittone-robinson buffer and 50% of ethanol were studied at physiological ph by uv-vis absorption, florescence, circular dichroism spectroscopic methods, viscos...

Journal: :international journal of advanced biological and biomedical research 2014
s. shahbazi h. askari a. mohamadi t. naseripour

effects of induced mutation via gamma irradiated with 250 gy dose (in nuclear agriculture research school- nuclear science and technology research institute) on trichoderma harzianum conidiaon chitinase activity by sts molecular marker have been evaluated in this study. among 20 irradiated mutants which selected via improved antagonistic capability against rhizoctonia solani, pcr amplified chit...

Journal: :BioTechniques 1993
I Turovets A Lewis D Palanker H Gilo A Vilenz J C Broder S Lewis

Poration of millions of cells with single laser pulses of an argon fluoride excimer laser is developed and demonstrated on plant cells. The essence of the technique is to use the large beam size (10 x 25 mm) of the excimer laser and to split it using an appropriate mask into millions of micron- or submicron-sized beams of 193-nm radiation with enough energy to perforate cell membranes and walls...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز 1381

‏‎this study investigated the effect of prior knowledge on the listening comprehension performance of fl learners. twenty students, male and female, drawn from the two intact groups of the senior and junior english language and literature majors were chosen as the participants of this study . the two groups were then randomly assigned into the experimental and control group. the experimental gr...

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