نتایج جستجو برای: synthetic envelope pp450
تعداد نتایج: 179508 فیلتر نتایج به سال:
Recent studies demonstrated that a synthetic fusion peptide of HIV-1 self-associates in phospholipid membranes and inhibits HIV-1 envelope glycoprotein-mediated cell fusion, presumably by interacting with the N-terminal domain of gp41 and forming inactive heteroaggregates [Kliger, Y., Aharoni, A., Rapaport, D., Jones, P., Blumenthal, R. & Shai, Y. (1997) J. Biol. Chem. 272, 13496-13505]. Here, ...
This paper presents a quantitative metric to describe the multidimensionality of spectral envelope perception, that is, the perception specifically related to the spectral element of timbre. Mel-cepstrum (Mel-frequency cepstral coefficients or MFCCs) is chosen as a hypothetical metric for spectral envelope perception due to its desirable properties of linearity, orthogonality, and multidimensio...
As the interface between a microbe and its environment, the bacterial cell envelope has broad biological and clinical significance. While numerous biosynthesis genes and pathways have been identified and studied in isolation, how these intersect functionally to ensure envelope integrity during adaptive responses to environmental challenge remains unclear. To this end, we performed high-density ...
background and aims: infectious bronchitis virus (ibv) is the etiological agent of infectious bronchitis (ib), which is an acute and highly contagious disease of the respiratory and sometimes the urogenital tracts of chickens. in iran, the disease has been identified in chicken flocks with serological and virus isolation methods. gene 3c (e) encode envelop (small membrane) protein. for envelope...
مشکلاتی از قبیل تهیه، حمل و نقل و اجرا در استفاده از پوشش های معدنی در پروژههای زهکشی باعث استفاده از پوششهای مصنوعی گردید. در این تحقیق عملکرد پوشش مصنوعی pp450 تولید دو کارخانه ایرانی (تحت عنوان الف و ب) از نظر میزان نفوذپذیری و خصوصیات هیدرولیکی مورد بررسی و با نوع مشابه خارجی مقایسه گردید. بدین منظور ابتدا از طریق آزمایش های استاندارد کومو و سپس به وسیله مخزن خاک و شن پوشش های مصنوعی مور...
این تحقیق به منظور بررسی تأثیر تناوب های اعمال گرادیان هیدرولیکی بر عملکرد پوشش های مصنوعی زهکشی در دوره آغازین بهره برداری، انجام شده است. به همین جهت از آزمون نفوذسنجی و ادوات ساخته شده مطابق استاندارد astm d-5101 با استفاده از خاک شور اراضی پروژه زهکشی شادگان (استان خوزستان) استفاده شد. در بخش اول تحقیق، سه پوشش مصنوعی plm مشتمل بر pp450 و pp700 ایرانی و pp450 خارجی برای انتخاب پوشش مناسب ای...
After the initial fast spiral-in phase experienced by a common-envelope binary, the system may enter a slow, self-regulated phase, possibly lasting 100s of years, in which all the energy released by orbital decay can be efficiently transported to the surface, where it is radiated away. If the remaining envelope is to be removed during this phase, this removal must occur through some as-yet-unde...
Pleasant singing voice is often ornamented by vibrato. This pitch fluctuation acts as a distinctive feature for singing and promotes voice quality. Nevertheless, independent pitch processing in singing voice synthesis does not guarantee the output quality. The spectral envelope actually varies with pitch during human voice production. This paper proposes a modeling technique for singers’ vibrat...
In the title compound, C(20)H(26)O(2), which is the 6-methyl-ene derivative of androstenedione and a synthetic percursor of exemestane, the steroid A ring approximates to a sofa (or envelope) conformation, with the methyl-ene group adjacent to the link to the B ring lying out of the plane of the other atoms. The B and C rings have slightly flattened chair conformations and the D ring is an enve...
A flexible and efficient method for finding the envelope within the empirical mode decomposition (EMD) is introduced. Unlike the existing (deterministic) spline based strategy, the proposed envelope is a result of an optimisation precess and sought as a minimum of a quadratic cost function. A closed form solution of this optimisation problem is obtained and it is shown that by choosing free par...
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