Structure and Photochromism of Al-Cd-O-F Glasses.

نویسندگان
چکیده

برای دانلود رایگان 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

Atomic Structure of Rare Earth Si-Al-O-N Glasses

In this paper the results of X-ray diffraction experiments of Ln-Si-Al-O-N (Ln = La, Gd, Yb) glasses are presented. Total structure factors and pair correlation functions allow the determination of the first coordination sphere of Ln atoms. The bond lengths observed correspond to the ionic radii of the Ln-ions surrounded by oxygen and nitrogen atoms. The presence of non-bridging nitrogen is dis...

متن کامل

o f CD 4 Lineage T Cells

Thymocytes must bind major histocompatibility complex (MHC) proteins on thymic epithelial cells in order to mature into either CD8 + cytotoxic T cells or CD4 + helper T cells. Thymic precursors express both CD8 and CD4, and it has been suggested that the intracellular signals generated by CD8 or CD4 binding to class I or II M H C , respectively, might influence the fate o f uncommitted cells. H...

متن کامل

The Eff iciency o f Acute Infect ion o f CD 4 + T cells Is

Human immunodeficiency virus (HIV) disease is sub-Saharan Africa generally differs from that observed in the United States and other developed countries in that the risk of seroconversion after exposure is greater and the rate of disease progression to AIDS and death is faster. One theory that could in part explain this difference is the increased state of immune activation associated with a re...

متن کامل

the underlying structure of language proficiency and the proficiency level

هدف از انجام این تخقیق بررسی رابطه احتمالی بین سطح مهارت زبان خارجی (foreign language proficiency) و ساختار مهارت زبان خارجی بود. تعداد 314 زبان آموز مونث و مذکر که عمدتا دانشجویان رشته های زبان انگلیسی در سطوح کارشناسی و کارشناسی ارشد بودند در این تحقیق شرکت کردند. از لحاظ سطح مهارت زبان خارجی شرکت کنندگان بسیار با هم متفاوت بودند، (75 نفر سطح پیشرفته، 113 نفر سطح متوسط، 126 سطح مقدماتی). کلا ...

15 صفحه اول

The Structure O F the Models and Its Motivation

The basic structural assumptions concerning the dynamic models of the reaction latency are presented. The linear dynamic stochastic model of the reaction latency is considered as a special case of dynamic model. The biological motivation for using these models are outlined. These models express the reaction latency as a first access time of the random threshold of a certain stochastic process. ...

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: Journal of the Society of Materials Science, Japan

سال: 1992

ISSN: 1880-7488,0514-5163

DOI: 10.2472/jsms.41.578