منابع مشابه
Spectrometry in the Analysis of High Purity Materials
Spark source mass spectrometry (SSMS) and atomic absorption spectrometry (AAS) have played important roles as powerful analytical tools. Both these techniques have undergone significant improvements since the late fifties in instrumentation and methodology leading to their application in various branches of science and te chnology. These techniques can be regarded as complementary techniques in...
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چکیده ارتباط در کلاس به عوامل زیادی از جمله معلمان، دانش آموزان، برنامه های درسی و از همه مهم تر، مواد آموزشی وابسته است. در تدریس ارتباطی زبان که تاکید زیادی بر توانش ارتباطی دارد، کتاب درسی به عنوان عامل موثر بر پویایی کلاس محسوب میگردد که درس ها را از طریق فراهم آوردن متن ارتباط کلاسی و هم چنین نوع تمرین زبانی که دانش آموزان در طول فعالیت های کلاسی به آن مشغول اند، کنترل می کند. این حقیقت ک...
15 صفحه اول12 Materials for Spin Electronics
Materials which are currently used in spin electronic devices, and materials which may be useful in future are discussed. These include ironcobaltand nickel-based alloys for spin polarization and analysis, metallic and insulating antiferromagnets for exchange bias and oxides for tunnel barriers. The 3d alloys also serve as detection or sensor layers. Permanent magnet materials play a role in bi...
متن کاملMaterials Meets Concepts in Molecule-Based Electronics
Molecular semiconductors differ from traditional semiconducting materials (such as Ge, Si, GaAs, etc.) in many regards including their mechanical, electrical, and optical properties, which is a direct consequence of their construction principles. While in traditional semiconductors, the basic building blocks are atoms that are strongly linked together by covalent or ionic bonds, organic semicon...
متن کاملHigh purity amphotericin B.
OBJECTIVES Amphotericin B (AmB) is a drug of choice for treatment of disseminated fungal infections, but its use is often associated with severe adverse effects. Our observation that generic formulations of AmB contain multiple polyene components led us to propose that removal of other polyenes would yield a high purity AmB (AmBHP) with an improved therapeutic index. METHODS To test that prem...
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ژورنال
عنوان ژورنال: The Journal of the Society of Chemical Industry, Japan
سال: 1960
ISSN: 0023-2734,2185-0860
DOI: 10.1246/nikkashi1898.63.22