نتایج جستجو برای: proton donors
تعداد نتایج: 103838 فیلتر نتایج به سال:
Introduction: Proton therapy is newer therapeutic method for early stage breast cancer. Proton beams release most of their energy in the Bragg peak and then will be a rapid decline in their end. When protons interact with matter, produce secondary particles like neutrons and gammas, and these unwanted radiation has no beneficial effect and also is believed to increase the risk ...
introduction: blood derived products have been known as an effective treatment for many years. however, this treatment is not without risk of infections transmission including hepatitis b virus (hbv) and hepatitis c virus (hcv) and human immune-deficiency virus (hiv) in people who received the blood. nevertheless, due to a high risk of blood born diseases through blood transfusion, screening fo...
Proton therapy is a common form of external radiation therapy based on the manipulation of Bragg peak of this beam, it can treat the tumor by delivering high levels of doses to it, while protecting surrounding healthy tissues against radiation. In this work, the dose distribution of proton and secondary particles such as neutrons, photons, electrons and positrons in gastric cancer proton therap...
Poly(methyl methacrylate-co-nitrophenyl maleimide) (MMA-co-NMI) and poly(methyl methacrylate-co-hydroxyphenyl maleimide) (MMA-co-HMI) copolymers were synthesized using free radical polymerization of MMA with a new MI monomer containing phenyl and –NO2 groups. Proton exchange membrane fuel cell(PEMFC) were prepared using these copolymers as membrane matrix and phosphotungstic acid (PWA)...
In order to find the susceptibility of the Claisen rearrangement and next proton shift reaction of ally) aryl etherto the substiment effects in pan position, the kinetic and the:rmodynamie parameters are calculated at The33 LTP level using 6-3110. b asis set. The calculated activation energies for the rearrangements and protonshift reactions are around 3133 kcaUmol and 52.16 kcal/mol, nap.. liv...
Kidny transplantation is often accompanied by psychological problems. Alteration in the body image is one of these problems.Body image is defined as one,s perception of this physical status which disturbed by alerted body structure, function or appearance. In this respect , this study was done to compare the body image of Donors and recipients of renal transplantation before and after the tran...
introduction and aims: considering high prevalence of hepatitis b virus (hbv) in iran and need for its prevention, determination of causes and risk factors can help health policy makers in control of disease. materials and methods: all blood donors of tehran city from april 1997 to march 2000 were studied in a case control design. hbsag positive donors who were referred to hepatitis consultatio...
background: unsafe transfusion practices put patients at high risk of transfusion transmissible infections. we aimed to evaluate the prevalence of transfusion transmissible infections (including human immunodeficiency virus [hiv] 1 and 2, hepatitis b virus [hbv], hepatitis c virus (hcv) and syphilis) during a period of 18 months among blood donors in the blood bank of lady hardinge medical coll...
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