نتایج جستجو برای: medicinal plant neutron activation analysis elements gamma
تعداد نتایج: 3839498 فیلتر نتایج به سال:
Neutron Activation Analysis (NAA) is an established nuclear analytical technique with applications in a broad range of scientific and technological fields. Typically, conventional NAA involves analysis of small material portions of 10 to 100 g in mass. However, analysis of samples of a larger mass implies a number of additional advantages such as (a) analysis of objects too precious to remove ...
Chloride (Cl) ions diffuse into iron objects during burial and drive corrosion after excavation. Located under corrosion layers, Cl is inaccessible to many analytical techniques. Neutron analysis offers non-destructive avenues for determining Cl content and distribution in objects. A pilot study used prompt gamma activation analysis (PGAA) and prompt gamma activation imaging (PGAI) to analyse t...
Determination of the more common light elements such as nitrogen and chlorine at trace levels is difficult because of their high abundance on sample surfaces, in materials used to build analysis instruments, and in the residual gas of the instrument vacuum. We present here a new approach to analysis of these elements: accelerator mass spectrometry (AMS) combined with neutron activation. The pro...
Catalytic Spectrophotometric Determination of Manganese in Some Medicinal Plants and Their Infusions
The therapeutic effect of medicinal plants for the treatment of various diseases is based on the chemical compounds in these plants. The major components are organic compounds, some of which have biological activity, but none act independently and they cannot replace the functions of the medicinal plant as a whole. Analyses have revealed that medicinal plants are rich in many trace elements, an...
بیماری ام اس (multiple sclerosis) یک بیماری عصبی خود ایمن است که در آن، دستگاه ایمنی بدن به دلیل یا دلایل ناشناخته ای به دستگاه عصبی مرکزی حمله کرده و با از بین بردن غلاف سلول های عصبی، آسیب های متعددی را به بدن وارد می کند. یکی از عوامل بروز این بیماری می تواند متعادل نبودن میزان عناصر کم مقدار در بدن انسان باشد. تجزیه ی خون با استفاده از تجزیه به روش فعال سازی نوترونی (neutron activation anal...
Upon increasing needs and vast application of neutron detectors, especially in nuclear reactors and growing number of linear accelerators, design and manufacturing of neutron detectors is a serious demand. The aim of this project is building neutron detectors capable of compensating gamma and temperature response in a radiation media. A special thermocouple coated with Boron carbide at the junc...
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