نتایج جستجو برای: beta sources
تعداد نتایج: 474138 فیلتر نتایج به سال:
The census of obscured quasar populations is incomplete, and remains a major unsolved problem, especially at higher redshifts, where we expect greater density galaxy formation activity. We present Gemini GNIRS near-infrared spectroscopy 24 luminous candidates from the Sloan Digital Sky Survey's Stripe 82 region. targets were photometrically selected using WISE/W4 selection technique that optimi...
Previously, we showed that expression of a dominant-negative form of the transforming growth factor beta (TGF-beta) type II receptor in skeletal tissue resulted in increased hypertrophic differentiation in growth plate and articular chondrocytes, suggesting a role for TGF-beta in limiting terminal differentiation in vivo. Parathyroid hormone-related peptide (PTHrP) has also been demonstrated to...
Tracheal relaxing effects and beta 2-selectivity of TA-2005 were investigated by functional experiments and radioligand binding assay in guinea pigs in comparison with those of other beta-agonists, isoproterenol, procaterol, formoterol and salbutamol. The relaxing activity of TA-2005 on histamine-induced contraction in the isolated trachea was most potent among the five agonists, and it was blo...
To clarify contradictions in past reports and the package inserts for beta-adrenergic blocking agents (beta-blockers) for patients with intermittent claudication (IC), we investigated the effects of beta-blockers in patients with IC using the systematic review technique. Data sources were randomized, controlled trials that investigated the effects of beta-blockers compared with the placebo or u...
Introduction: There are many ways to treat cancer and pain relief. One of the methods is radiopharmaceutical therapy. Indium 111-rituximab contains the radioisotope indium-111 and rituximab. The Indium-111, after decay, emits gamma rays with energies of 245 KeV and 171 KeV, and beta-radiation of 26 KeV. In this study, the absorbed dose of 111In-Rituximab in human body was calcu...
The assessment of effects associated with cognitive impairment using electroencephalography (EEG) power mapping allows the visualization of frequency-band specific local changes in oscillatory activity. In contrast, measures of coherence and dynamic source synchronization allow for the study of functional and effective connectivity, respectively. Yet, these measures have rarely been assessed in...
بیگانگی پدیده اجتماعی است که در اکثر فرهنگ ها به عنوان معضل و مسأله اجتماعی شناخته می شود. تحقیقات مربوط به بیگانگی در طول سال های دهه 1970 به اوج خود رسیده است. انزوای اجتماعی (به عنوان یکی از مولفه های بیگانگی) به معنی کمبود در کمیت و کیفیت تعاملات اجتماعی است. به عبارت دیگر، وضعیت انزوای اجتماعی شامل تعاملات اجتماعی کم و فرار از نقش های اجتماعی و فقدان روابط متقابل ارزشمند با دیگران است. ه...
OBJECTIVE To assess ecological models to describe infant mortality rate in Ceara (Northeastern Brazil) in two different periods of time. METHODS This was a cross-sectional ecologic study of two years, 1991 and 2000, using non-matching information per municipalities. Estimates on the infant mortality rate of the Instituto de Pesquisas Econômicas Aplicadas (Institute of Applied Economic Researc...
In order to elucidate brain mechanisms that contribute to the increased tendency for vigilance dysregulation in the elderly, we examined the spatial organization of brain electric activity [electroencephalogram (EEG)] during decreasing vigilance from alertness to onset of sleep stage 2, comparing 7 old and 10 younger, healthy subjects (60-79 and 18-41 years old, respectively). Two features were...
It has been understood since 1897 that accelerating charges must emit electromagnetic radiation. Although first derived in 1904, cyclotron radiation from a single electron orbiting in a magnetic field has never been observed directly. We demonstrate single-electron detection in a novel radio-frequency spectrometer. The relativistic shift in the cyclotron frequency permits a precise electron ene...
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