Resolution degradation due to gradient coil deformation and vibration in NMR microscopy is investigated using finite element analysis. From the analysis, deformations due to the Lorentz force can be as large as 1-10 mum depending on the gradient strength and coil frame material. Thus, these deformations can be one of the major resolution limiting factors in NMR microscopy. Coil vibration, which...

predominance of the 1,2-cis-mitosene degradation products occurring at low pH was ascribed to the directing force exterted on the incoming nucleophile by the protonated 2-amino function of an intermediate in the process as well as to steric hindrance due to the orientation of the C9 urethane substituent in one of the degradation steps preceding the formation of the intermediate. The differences...

BACKGROUND We examined the relationship of musculoskeletal risk factors underlying force and repetition on tissue responses in an operant rat model of repetitive reaching and pulling, and if force x repetition interactions were present, indicative of a fatigue failure process. We examined exposure-dependent changes in biochemical, morphological and sensorimotor responses occurring with repeated...

The chronic exposure of astronauts to microgravity results in structural degradation of their lower limb bones. Currently, no effective exercise countermeasure exists. On Earth, the impact loading that occurs with regular locomotion is associated with the maintenance of bone's structural integrity, but impact loads are rarely experienced in space. Accurately mimicking Earth-like impact loads in...

This work demonstrates the preparation of spherical nanocellulose from microcrystalline cellulose by controlled hydrolysis using anaerobic microbial consortium. The nanocellulose formed during the degradation of microcrystalline cellulose was separated by ultra filtration membrane and purified by differential centrifugation. The purified nanocellulose was characterized by nanoparticle size anal...

Stability is crucial to the process of developing new drugs. studies are regarded as a must for acceptance and approval any pharmaceutical product since they guarantee stability quality, safety, efficacy during shelf life. This article will reduce knowledge gap on most important aspect researcher or developer who formulation by providing complete information about drug stability, principle degr...

Collagen cleavage, facilitated by collagenases of the matrix metalloproteinase (MMP) family, is crucial for many physiological and pathological processes such as wound healing, tissue remodeling, cancer invasion and organ morphogenesis. Earlier work has shown that mechanical force alters the cleavage rate of collagen. However, experimental results yielded conflicting data on whether applying fo...

The aim of the present study was to investigate memory effects, force accuracy, and variability during constant isometric force at different force levels, using auditory biofeedback. Two types of transition trials were used: a biofeedback-no biofeedback transition trial and a no biofeedback-biofeedback transition trial. The auditory biofeedback produced a low- or high-pitched sound when partici...

A nanolayer of composite and Rhodococcus erythropolis biocatalyst was studied for the first time for desulfurization of dibenzothiophene as a model sulfur compound and its performance was compared with that of composite and R. erythropolis alone. The nanolayer of composite was synthesized by sol-gel method from ferrous oxalate and zinc oxalate precursors coated on glass by spin coating techniqu...

The present work reported the preparation of biocomposites based on poly(3-hydroxybutyrate) (PHB), plasticizer, and bacterial cellulose (BC) by melt processing their testing means thermal properties (DSC), water absorption, in vitro degradation. surface was analyzed via atomic force microscopy (AFM). In degradation evaluated weight loss (DSC) assessment after immersion specimens phosphate-buffe...