نتایج جستجو برای: density tracer

تعداد نتایج: 491143  

Journal: :Monthly Notices of the Royal Astronomical Society 2022

ABSTRACT We use Gaia photometry and astrometry to estimate the vertical spatial structure of Milky Way at Solar radius, formally accounting for sample incompleteness (the selection function) parallax measurement uncertainty. Our results show impressive precision demonstrating power data. However, systematic errors dominate parameter value uncertainties. thoroughly test quantify impacts all The ...

2003
O. Bénichou A. M. Cazabat J. De Coninck M. Moreau G. Oshanin

We overview recent results on intrinsic frictional properties of adsorbed monolayers, composed of mobile hard-core particles undergoing continuous exchanges with a vapor phase. In terms of a dynamical master equation approach we determine the velocity of a biased impure molecule-the tracer particle (TP), constrained to move inside the adsorbed monolayer probing its frictional properties, define...

2007
Paolo Pierobon

Intracellular transport along microtubules or actin filaments, powered by molecular motors such as kinesins, dyneins or myosins, has been recently modeled using one-dimensional driven lattice gases. We discuss some generalizations of these models, that include extended particles and defects. We investigate the feasibility of single molecule experiments aiming to measure the average motor densit...

We present the case of a 60-year-old man with metastatic neuroendocrine tumor of the ileum following ileal resection, being evaluated for 177Lu-based peptide receptor radionuclide therapy. 68Ga-DOTANOC PET/CT showed focal increased tracer uptake in the scrotal region without any morphologic changes on the corresponding CT images. Similar increased tracer uptake was seen on...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس 1372

چندین مورد ایمونواسی آنزیمی (eia) برای اندازه گیری کورتیزول گزارش شده است . اینها آنزیمهای مختلفی نظیر آلکالن فسفاتاز و بتاگالاکتوزیداز و hrp را شامل می شود . اخیرا" پنسیلیناز به عنوان آنزیم مارکر برای اندازه گیری تعدادی از استروئیدها گزارش شده است . در این مطالعه از پنسیلیناز (ec 3.5.2.6) برای اندازه گیری کورتیزول در نمونه های سرم استفاده شد. مشتق cortisol -3-o-cmo تهیه شد. این مشتق به bsa و ن...

Journal: :Journal of nuclear medicine : official publication, Society of Nuclear Medicine 2012
Marc D Normandin Kitt F Petersen Yu-Shin Ding Shu-Fei Lin Sarita Naik Krista Fowles Daniel M Skovronsky Kevan C Herold Timothy J McCarthy Roberto A Calle Richard E Carson Judith L Treadway Gary W Cline

UNLABELLED The ability to noninvasively measure endogenous pancreatic β-cell mass (BCM) would accelerate research on the pathophysiology of diabetes and revolutionize the preclinical development of new treatments, the clinical assessment of therapeutic efficacy, and the early diagnosis and subsequent monitoring of disease progression. The vesicular monoamine transporter type 2 (VMAT2) is coexpr...

Journal: :Journal of nuclear medicine : official publication, Society of Nuclear Medicine 2004
Mitsuru Momose Sybille Reder David M Raffel Petra Watzlowik Hans-Jürgen Wester Ngoc Nguyen Philip H Elsinga Frank M Bengel Joerg Remien Markus Schwaiger

UNLABELLED (S)-(11)C-CGP12388 ((11)C-CGP12388) was recently developed as an in vivo PET tracer for the evaluation of cardiac beta-adrenergic receptors. The purpose of this study was to evaluate the myocardial kinetics of (11)C-CGP12388 using the perfused rat heart model. METHODS Normal rat hearts were cannulated for retrograde perfusion according to the Langendorff method. Studies were perfor...

2004
Mitsuru Momose Sybille Reder David M. Raffel Hans-Jürgen Wester Philip H. Elsinga Frank M. Bengel

(S)-11C-CGP12388 (11C-CGP12388) was recently developed as an in vivo PET tracer for the evaluation of cardiac -adrenergic receptors. The purpose of this study was to evaluate the myocardial kinetics of 11C-CGP12388 using the perfused rat heart model. Methods: Normal rat hearts were cannulated for retrograde perfusion according to the Langendorff method. Studies were performed using constant cor...

Journal: :The Journal of experimental biology 1995
Brown Kovacs Butler Wang Lehr Banzett

The unidirectional gas-flow pattern through the avian lung is thought to result from 'aerodynamic valves'; support for this hypothesis lies mainly in the failure to find any evidence for anatomical valves. During expiration, air flows from the caudal air sacs through the major exchange area of the lung, the paleopulmonic parabronchi, instead of bypassing the lungs via the intrapulmonary bronchu...

Journal: :Journal of lipid research 1989
L Berglund M F Sharkey R L Elam J L Witztum

Lovastatin therapy is known to induce hepatic low density lipoprotein (LDL) receptor mRNA and LDL receptor activity. Yet, in studies in humans and animals it has been difficult to demonstrate an enhancement of the plasma fractional catabolic rate (FCR) of an injected LDL tracer during lovastatin therapy. One explanation may be that the composition of the LDL tracer may also change during therap...

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