Studies on Isotopic Ratios of Osmium and Iridium in Cosmic Spherules Using Instrumental Neutron Activation Analysis

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

comparative dna interaction studies of antiviral drug, zidovudine and its complex using different instrumental methods

هدف از این مطالعه بررسی امکان استفاده از داروهای شناخته شده در درمان سایر بیماریها به عنوان داروهای ضد سرطان است. همچنین با استفاده از این داروها در ساختمان کمپلکس فلز می توان شاخص های دارویی بدست آمده را بررسی نمود. داروی ضد ویروس ایدز(hiv)به نام زیدوودین(azt)انتخاب و.کمپلکس.محلول.در.آب[pt(azt)2]cl2سنتزو به روشهای مختلف فیزیکی و شیمیایی شناسایی گردید. بر هم کنش مقایسه ای این دارو و کمپلکس پلا...

15 صفحه اول

Instrumental Neutron Activation Analysis of Trace Elements in Some Food Spices Consumed In Tehran, Iran

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...

متن کامل

Instrumental neutron activation analysis of air suspended particles in Rasht city, Iran

Background: In addition to gas pollutants, many chemicals and air pollutants are in the form of particulate matter. Particulate matter consists of a complex mixture of variable sized particles and physicochemical composition. These particles mainly contain minerals including Fe, Al, Ca, K, Cu, Ti, Mn, Ni, V and their size, chemical composition and concentration are important to assess ...

متن کامل

Oxygen Isotope Ratios of Large Cosmic Spherules: Carbonaceous and Ordinary

Introduction: Based on petrographic and ion probe investigation of small micrometeorites (150–250 μm), previous studies (e.g. [1]) have concluded that 99% of them should come from carbonaceous, possibly cometary parent bodies (CM/CR related). Our oxygen isotope measurements of 33 large (>500 μm) silicate type cosmic spherules (CS), using IR-laser fluorination/mass spectrometry, indicate that 30...

متن کامل

Instrumental neutron activation analysis (INAA) for steel analysis and certification

Addition of trace elements (intended or as impurities) in steel or alloys can completely change the properties of materials; thus, there is a necessity to have reliable analytical techniques to determine major and trace components in this type of material. Also, to solving problems with quality control/quality assurance (QC/QA) in this subject, appropriate certified reference materials should b...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: International Astronomical Union Colloquium

سال: 1991

ISSN: 0252-9211

DOI: 10.1017/s0252921100066598