نتایج جستجو برای: medicinal plant neutron activation analysis elements gamma
تعداد نتایج: 3839498 فیلتر نتایج به سال:
The mineral contents of roots, leaves, stalks, and inflorescences the aromatic plant species Anethum graveolens L., Coriandrum sativum Lavandula angustifolia Mill., Levisticum officinale W.D.J. Koch, Salvia sclarea L. were studied by means neutron activation analysis. 36 major trace elements determined biological transfer coefficients calculated. Among minor elements, K with a content in range ...
Since the installation of TRIGA MARK II reactors in National Centre for Nuclear Energy, Science and Technology (CNESTEN), Neutron Activation Data Analysis software (NADA) neutron activation analysis (NAA) based on relative method was first used; Over years, laboratory has been seeking to develop other softwares k0-INAA standardization namely K0-IAEA k0 Windows. In this paper we will focus compa...
Taking the necessary precautions essential for accurate trace element analysis, the zinc concentrations of 227 samples of amniotic fluid taken at term were determined by means of neutron activation analysis. Half of the zinc was found to be bound to the particles present in amniotic fluid. In the control group (123 cases) the zinc concentrations ranged from 25—261 g/l for untreated samples and ...
The development on neutron activation analysis (NAA) into a technique of practical interest effectively started about 60 years ago, when nuclear reactors became available and widely accessible as intense sources of neutrons. During 50 out these 60 years, the series of Modern Trends in Activation Analysis (MTAA) Conferences acted as a true companion and facilitator of this growth. As trendwatche...
Research carried out by me and my group over the last almost four decades are summarized here. The main emphasis of my work was and continues to be on plant physiology using radiation and radioisotopes. Plants live on water and inorganic elements. In the case of water, we developed neutron imaging methods and produced 15O-labeled water (half-life 2 min) and applied them to understand water circ...
Introduction There is a growing interest in determining the concentration of various elements in food spices. In the present study, the instrumental neutron activation analysis (INAA) was employed to measure the trace elements in 11 commonly food spices consumed in Tehran, Iran. Materials and Methods The levels of K, Mn, Na, Cl, V, Br, Al, and As were determined and their effects on human healt...
Increasing growth of terrorist's activities and threats to date and illegal transit of cargo led to the discovery and detection systems which have a lot of development. In this paper, Prompt Gamma Neutron Activation Analysis (PGNAA) technique has been used to discovery and detection of materials. Besides using simulated hypothetical system, should also pay special attention to safety radiation ...
The accurate and efficient simulation of coupled neutron-photon problems is necessary for several important radiation detection applications. Examples include the detection of nuclear threats concealed in cargo containers and prompt gamma neutron activation analysis for nondestructive determination of elemental composition of unknown samples. In these applications, highresolution gamma-ray spec...
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