Sliver Evenness Tester by the Use of Radioactive Isotopes

The Use of Two Radioactive Isotopes

There are 2 radioactive isotopes of iron suitable for use as biological tracers. One of these, Fe59, has a half life of 47 days and emits gamma rays and low energy beta rays. The other, Fe55, has a half life of about 5 years and emits low energy x-rays only. This paper describes how these 2 isotopes are prepared for red blood cell tracer studies, how biological samples containing the radioactiv...

The Radioactive Isotopes

Personnel protection in the use of radioactive isotopes.

Artificially produced radioactive isotopes are distributed by the Atomic Energy Commission according to strict rules on account of the dangers inherent in the handling of such materials. Before an individual can obtain radioisotopes, he has to present evidence that he possesses the knowledge, facilities and equipment to meet the minimum standards of safe handling. The Isotopes Division in Oak R...

Dosage determination in the use of radioactive isotopes.

As commonly used, most radioactive isotopes are ingested or injected in soluble form and subsequently deposited with a greater or lesser degree of selectivity in various cells and organs. In the event of a single administration, the number of radioactive atoms present at any particular site will increase at first (as they are drawn from the circulation along with their stable isotopes), it will...

a gender-based pragmatic analysis of the use of english compliment responses by iraqi efl students:a speech act perspective

تعارفات کنش های گفتاری هستند که افراد در زندگی روزمر? خود به منظور برقراری دوستی یا تداوم روابط مسالمت آمیز به کار می برند. ساز و کار تعارف مختص زبان انگلیسی یا هر زبان دیگری نیست و پدیده ای است جهانی و در همه زبانها حضور دارد. تفاوتی که از این نظر در زبانها و فرهنگ ها وجود دارد مربوط به پاسخ به این کنش گفتاری در گفتمان است. این مطالعه به بررسی تنوع پاسخ های انگلیسی و عربی به کنش گفتاری تعارف د...