نتایج جستجو برای: 15 and 25
تعداد نتایج: 16942994 فیلتر نتایج به سال:
Background: To eradicate a problem such as drug abuse, we need thorough knowledge of the problem and its epidemiological aspects. In response to increasing ecstasy abuse among youth, as noted by the increase in related health issues at emergency clinics, we performed this epidemiologic study on ecstasy use in Tehran.Methods: In this cross-sectional study, including 1,903 youth aged 15-25 years,...
چکیده زمینه و هدف: بیشترین حجم تردد خودروها در سطح جاده های کشور مربوط به تعطیلات نوروزی است. هر ساله تدابیر ترافیکی خاصی در این زمینه پیش بینی می-شود، لذا بررسی وضعیت تلفات رانندگی این ایام از اهمیت خاصی برخوردار است. روش بررسی: اطلاعات 1558 نفر از قربانیان تصادفات نوروز سال 87 که در پرسشنامه های از پیش طراحی شده تکمیل شده بود، توسط گروه آمار سازمان پزشکی قانونی کشور جمع آوری شده و مورد تج...
in this study, the effects of oleothermal modification on physical and mechanical peroperties of fir wood (abeis sp.) blocks were examined. at first, some blocks of fir wood with 5 × 20 × 120 cm dimensions were prepared. the blocks were treated in soybean oil. the effects of 3 factors such as treatments temperature (180and 200 °c), holding time (12 and 15 h) and initial moisture content of wood...
introduction: diabetes mellitus is an growing national and international public health concern. the number of people affected by diabetes in world by 2030 will be 69% in developing countries. regular physical activity plays a key role in the management of type 2 diabetes melitus, particularly glycemic control. it has been recommended that peoples with type 2 diabetes participate in moderate-int...
The separation of folate compounds has been achieved by gel chromatography and the effect of buffer concentration on the elution pattern of folate derivatives was investigated by Sephadex G-15 and G-25 column chromatography. Highly conjugated polyglutamates appear in the effluent considerably sooner when eluted with water than would be expected from their molecular weights. Monoglutamates, exce...
the study aims to achieve research and testing of hypotheses survey techniques and questionnaires to collect information used. 61 questions in the questionnaire included 15 questions and 46 open questions according to research in the study population, girls and their mothers as the value of different children investment should be. mothers according to the research community benefits from havi...
Parietal chest wall tuberculosis is an extremely rare manifestation of tuberculosis (TB) in children. We present the case of a 15 month-old girl presenting with a chest wall lesion initially thought to be of neoplastic origin and eventually diagnosed as chest wall TB, which was treated with surgical debridement and specific antitubercular therapy. The girl had not-measurable 25-hidroxy-vitamin ...
this research was conducted in two protect and destroy region in the middle zagros, in illam province. in order to identification of ecological species group and evaluate density of regeneration, effect of many factors such as protection, vegetation, physiographic factors, physical and chemical properties of soil in study locations were studied. to achieve these purpose number of 54 plots using...
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