نتایج جستجو برای: 137 سرب

تعداد نتایج: 18551  

2004
A. C. Andrello C. R. Appoloni

With the nuclear fission discovery and development of nuclear weapons in 1940s, artificial radioisotopes were introduced in the environment. This contamination is due to worldwide fallout by superficial nuclear tests realized from early 1950s to late 1970s by USA, former URSS, UK, France and China. One of theses radioisotopes that have been very studied is cesium-137. Cesium-137 has a half-life...

Journal: :Cancer prevention research 2012
Igor E Koman Mairead Commane Geraldine Paszkiewicz Bhupinder Hoonjan Srabani Pal Alfiya Safina Ilya Toshkov Andrei A Purmal Dan Wang Song Liu Carl Morrison Andrei V Gudkov Katerina V Gurova

Development of safe and effective tumor-preventive treatments for high-risk patient populations and therapies for early-stage cancer remains a critical need in oncology. We have recently discovered compound with anticancer activity, Curaxin-137, which modulates several important signaling pathways involved in even the very early stages of cancer. In tumor cells, Curaxin-137 inhibits NF-κB- and ...

2016
Hua Shen Lin Wang Xin Ge Cheng-Fei Jiang Zhu-Mei Shi Dong-Mei Li Wei-Tao Liu Xiaobo Yu Yong-Qian Shu

Chemotherapy resistance frequently drives tumour progression. However, the underlying molecular mechanisms are poorly characterized. In this study, we explored miR-137's role in the chemosensitivity of lung cancer. We found that the expression level of miR-137 is down-regulated in the human lung cancer tissues and the resistant cells strains: A549/paclitaxel(A549/PTX) and A549/cisplatin (A549/C...

2008
S. N. Dzyubak Yu. I. Gubin O. P. Dzyubak P. V. Sorokin V. F. Popov A. A. Orlov V. P. Krasnov

As a result of nuclear power plant accidents, large areas receive radioactive inputs of 137 Cs. This cesium accumulates in herbs growing in such territories. The problem is whether the herbs contaminated by radio-cesium may be used as a raw material for medicine. The answer depends on the amount of 137 Cs transfered from the contaminated raw material to the medicine. We have presented new resul...

2011
T. Shono K. Ishikawa Y. Ochiai M. Nakao O. Togawa M. Nishimura S. Arai K. Nonaka Y. Sasaki H. Kita

Endoscopic submucosal dissection (ESD) is a promising procedure that enables en bloc resection of large superficial tumors in the upper gastrointestinal tract. On the other hand, ESD in the colon and rectum is technically difficult to perform because of its anatomical features. At our institution, 137 consecutive superficial colorectal tumors larger than 20 mm in diameter in 137 patients were t...

2015
Hiroo Nakajima Yoshiaki Yamaguchi Takashi Yoshimura Manabu Fukumoto Takeshi Todo

To investigate the transgenerational effects of chronic low-dose-rate internal radiation exposure after the Fukushima Daiichi Nuclear Power Plant accident in Japan, 18 generations of mice were maintained in a radioisotope facility, with free access to drinking water containing (137)CsCl (0 and 100 Bq/ml). The (137)Cs distribution in the organs of the mice was measured after long-term ad libitum...

Journal: :Journal of environmental radioactivity 2014
M H Paller G T Jannik R A Baker

During the operational history of the Savannah River Site (SRS), many different radionuclides have been released from site facilities into the SRS environment. However, only a relatively small number of pathways, most importantly (137)Cs in fish and deer, have contributed significantly to doses and risks to the public. The "effective" half-lives (Te) of (137)Cs (which include both physical deca...

ژورنال: :تابش و فناوری هسته ای 0
فرهاد ذوالفقارپور هیات علمی در دانشگاه محقق اردبیلی پریسا تقی پور نیار گروه فیزیک، دانشکده علوم پایه، دانشگاه محقق اردبیلی، اردبیل، ایران سارا عظیم خانی گروه فیزیک، دانشکده علوم پایه، دانشگاه محقق اردبیلی، اردبیل، ایران محمد نیکوصفت گروه فیزیک، دانشکده علوم پایه، دانشگاه محقق اردبیلی، اردبیل، ایران

پراکندگی فوتون های گاما به سمت عقب از سطح یک ماده را پس پراکندگی پرتوهای گاما می گویند. در این پژوهش حفاظ های سربی، آلومینیومی و آهنی به شکل دیسک به ضخامت تقریباً 1/0 سانتی متر و قطر 18 سانتی متر ، به منظور بررسی پس پراکندگی تهیه شدند. همچنین یک چشمه ی سزیم 137 بین حفاظ و آشکارساز یدورسدیم قرار داده شد و طیف گامای چشمه ثبت گردید. به منظور بررسی تأثیر ضخامت حفاظ در میزان پس پراکندگی گاما، در هر م...

Journal: :iranian journal of radiation research 0
a.a. fathivand iranian nuclear regulatory authority (inra), national radiation protection department (nrpd), tehran, iran j. amidi iranian nuclear regulatory authority (inra), national radiation protection department (nrpd), tehran, iran g.h. heravi iranian nuclear regulatory authority (inra), national radiation protection department (nrpd), tehran, iran

background: two of the important radionuclides which are entered to environment and human diet are radium-226 (226ra) and cesium-137 (137cs). it is clear that the methods for preparation of foods such as peeling, washing, cooking or frying can affect the dose which is received by human due the to consumption of foodstuffs. an experiment has been performed at the environmental monitoring section...

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