نتایج جستجو برای: rotational barrier
تعداد نتایج: 120111 فیلتر نتایج به سال:
cerebral palsy (cp) is the most common motor disability in children, usually occurring during fetal development; before, during, or shortly after birth, or during infancy. cp takes place in about 2.1 per 1,000 live births .there is no exact reason but birth injury or inflammation of the central nervous system, infections and hypoxia are related risk factors of this disease. often, symptoms incl...
conclusions decreasing barriers to physical activity among the elderly causes physical activities to increase; therefore, energy expenditure is increased. decreasing social and environmental problems for the elderly is effective in increasing physical activity and energy expenditure. results the average age among the study population was 67.6 ± 6.8 years median, and the interquartile range (iqr...
The ability to determine one's location is fundamental to spatial navigation. Here, it is shown that localization is theoretically possible without the use of external cues, and without knowledge of initial position or orientation. With only error-prone self-motion estimates as input, a fully disoriented agent can, in principle, determine its location in familiar spaces with 1-fold rotational s...
Nascent Doppler profiles of CN ~X S! fragments from the 193 nm photodissociation of NCCN have been measured using high-resolution transient frequency modulated ~FM! absorption spectroscopy. This new method is highly suited for Doppler spectroscopy of nascent photoproducts. The experimental line shapes suggest an asymptotic available energy of 53006100 cm and are well described by a model in whi...
the effects of anterior discectomy and interposition al implant upon lumbar motion segment stability
the cadaver spine motion segment behavior under torsional load was evaluated with the disc intact, with partial anterior discectomy and with spacer insertion. the results of this study explain how anterior lumbar discectomy and interbody fusion (alif) affects the torsional stability of the motion segment. the pseudarthrosis rate of the anterior lumbar discectomy and interbody fusion (alif) is k...
T-lymphocytes have been previously implicated in protecting dopaminergic neurons in the substantianigra from induced cell death. However, the role of T-cells in neurodegenerative models such as Parkinson's disease (PD) has not been fully elucidated. To examine the role of T-lymphocytes on motor behavior in the 6-hydroxydopamine (6-OHDA) unilateral striatal partial lesion PD rat model, we assess...
The photofragment spectrum of N: + + N + (‘Ps ) + N + (‘Ps ) has been studied using a coaxial laser-ion beam spectrometer. Transitions from the excited 38,+ (u = 0,l) state of Nz + to the predissociative 3111, (L, = 0) state result in two bands with dense rotational structure at 15 300 and 13 100 cm ‘. A complete analysis of the 27 rotational branches associated with the 311,(u=o)+ “2: (U = 0) ...
Radicals such as CH2XCH2, where X is a halogen, play an important role in the stereochemical control observed in many chemical reactions. To elucidate the origin of the stereoselectivity, we calculated the structures and potential energy surfaces of the haloethyl radicals (CH2XCH2, X ) F, Cl, Br, I) using ab initio quantum mechanics [HF, local MP2, DFT (both B3PW91 and B3LYP)]. We find that the...
Semi-empirical PM3 calculations have been performed with MOPAC 6.0 programme to study conformational analysis of different stereoisomer of 3-methyl-2-benzothiazolylidenaminodichlorophosphine (I) and their rotational energy surfaces to find the most stable conformation. The geometry optimization of four possible conformers of I gives rise to two minimum energy structures of IA and IB having syn ...
The self-assembly of highly anisotropic colloidal particles leads to a rich variety of morphologies whose properties are just beginning to be understood. This article uses computer simulations to probe a particle-scale perturbation of a commonly studied colloidal assembly, a monolayer membrane composed of rodlike fd viruses in the presence of a polymer depletant. Motivated by experiments curren...
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