نتایج جستجو برای: mobile phase
تعداد نتایج: 761028 فیلتر نتایج به سال:
We modeled the mobility of mobile phone users in order to study the fundamental spreading patterns that characterize a mobile virus outbreak. We find that although Bluetooth viruses can reach all susceptible handsets with time, they spread slowly because of human mobility, offering ample opportunities to deploy antiviral software. In contrast, viruses using multimedia messaging services could i...
BACKGROUND Hospitals today are introducing new mobile apps to improve patient care and workflow processes. Mobile device adoption by hospitals fits with present day technology behavior; however, requires a deeper look into hospital device policies and the impact on patients, staff, and technology development. Should hospitals spend thousands to millions of dollars to equip all personnel with a ...
The NMR spectra of finely dispersed ice were investigated. It is shown that the narrow NMR signal from the ice is caused by the mobile water molecules on the ice-gas and iceteflon interfaces. The mobile water phase is in comparatively steady quasi-equilibrium with the strongly defective structure of the bulk ice. The relation of the superficial ice properties with the size of the ice grain is d...
abstract: In this paper we describe the thin layer chromatographic separation of eight of the most frequently used benzodiazepine derivates (alprazolam, bromazepam, chlorazepate potassium, chlordiazepoxide, diazepam, nitrazepam, oxazepam) and their degradation products after acid hydrolysis. Our aim was not only to develop a simple, rapid and efficient method for their separation but also the o...
Developments in mobile healthcare result in wide use of mobile phones to acquire, store or analyse mobile users’ biosignals, such as the electrocardiogram (ECG). These activities have motivated global research in designing new QRS-complex detectors and delineators for single-lead ECG signals. This paper examines a QRS detection and delineation algorithm based on a Euclideandistance calculation ...
During a landslide, the multi-phase nature of landslide debris defines its mobility. Eventually, frictional forces cause slide energy to dissipate, and contact transmit into nearby material. Using comparative analysis which analyzes mobility characteristics flow-like landslides with various materials, we conducted flume model experiment. Our conclusions are as follows: (1) liquid-phase highly m...
the dried plant was extracted with dichloromethane and after defatting with hexane, transferred repeatedly on silica columns using dichloromethane-hexane and ethyl acetate-hexane as mobile phases. finally the fractions were purified by high performance liquid chromatography using a pack-sil column and hexane: ethyl acetate as mobile phase. the structures of the isolated compounds included: cycl...
Size exclusion chromatography (SEC) has been widely applied in protein separation based on their molecular sizes. Here we present a peptide mixture from 1kD to 6 kD separation on size exclusion chromatography column Zenix TM -80. The effect of different mobile phases on the peptides’ separation performances was also explored. In the separation of insulin, glucagon, angiotensin I and bradykinin,...
We introduce a continuum model to describe the phase separation of a binary alloy in the presence of mobile dislocations. The kinetics of the local composition and dislocation density are coupled through their elastic fields. We show both analytically and numerically that mobile dislocations modify the standard spinodal decomposition process, and lead to several regimes of growth. Depending on ...
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