نتایج جستجو برای: carrier
تعداد نتایج: 72495 فیلتر نتایج به سال:
Polysulfone was investigated as an alternative base-polymer for polymer inclusion membranes (PIM’s) that could withstand harsh environmental conditions and have good transport efficiency of metal ions. PIM’s were prepared using polysulfone as a base polymer and Aliquat 336 as a carrier in the absence of a plasticizer. Chromium (VI) was used as standard to study the extraction efficiency of the ...
the purpose of this study was to examine the english language needs of medical students at tehran university of medical sciences . analysis of the needs took place for three groups: 320 undergraduate students, 30 postgraduate students and 20 university instructors. a triangulation approach to collect data was used in which a combination of the quantitative (using the questionnaires) and qualita...
spinal muscular atrophy (sma) is a common autosomal recessive neuromuscular disorder caused by the loss of α-motor neurons in the spinal cord. the survival motor neuron (smn) protein is encoded by 2 genes, smn1 and smn2. the most frequent mutation is the biallelic deletion of exon 7 of the smn1 gene. smn2 cannot compensate for the loss of smn1, due to the exclusion of exon 7. carrier frequency ...
because of participation in many aspects of human life, and due to oxidation-sensitive characteristics of dopamine (da) and arachidonoyl dopamine (aa-da), the necessity of biocompatible carrier to keep them against oxidation is of importance. in this work, we explored the putative binding sites of da and aa-da to -lactoglobulin (blg) as potent carrier. docking results identified the binding si...
مرجانها جانوران دریایی از رده آنتوزوآ (Anthozoa) و شاخه کنیداریا (Cnidaria) متشکل از پولیپ های متراکم هستند که هر کدام از آنها به صورت انفرادی به همراه جلبکی به نام زوگزانتلا زندگی همزیستی دارند. صخرههای مرجانی از مهمترین و مفیدترین عوامل در اکوسیستمهای دریایی محسوب میشوند. به همین دلیل حفاظت و ترمیم این آبزی در برنامههای توسعهای پایدار از توجه ویژهای برخوردار است. در سال 1390 به د...
CONTEXT In hereditary cancer syndrome families with an identified cancer associated mutation, mutation testing changes the carrier risk status of the tested person and may change the carrier risk status of relatives. OBJECTIVE This study aimed to describe the change in the distribution of carrier risk status resulting from testing in hereditary breast-ovarian cancer (HBOC) and hereditary non-...
Let V be a real unitary space. A real unitary space is said to be a subspace of V if it satisfies the conditions (Def. 1). (Def. 1)(i) The carrier of it ⊆ the carrier of V , (ii) the zero of it = the zero of V , (iii) the addition of it = (the addition of V )↾[: the carrier of it, the carrier of it :], (iv) the external multiplication of it = (the external multiplication of V )↾[: R, the carrie...
Abstract—There is a problem that the accuracy and stability of the carrier phase measurements cannot meet the requirement of the short baseline attitude determination, ultra-tight integration tracking loop for the carrier phase measurement is raised. In this paper, the mathematical model for carrier phase measurements is derived. The factors affecting the accuracy and stability of carrier phase...
A carrier separated OFDM system is proposed to support high data rates in mobile multiple access environments. OFDM is considered to support high data rates and carrier separation is introduced to combat multipath fading. The performance is comparable to that of a frequency hopped OFDM system. While promising robustness against multipath fading, the computational complexity of a carrier separat...
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