نتایج جستجو برای: gravimetric analysis

تعداد نتایج: 2826087  

Journal: :American journal of physiology. Regulatory, integrative and comparative physiology 2011
R M Dongaonkar G A Laine R H Stewart C M Quick

Microvascular permeability to water is characterized by the microvascular filtration coefficient (K(f)). Conventional gravimetric techniques to estimate K(f) rely on data obtained from either transient or steady-state increases in organ weight in response to increases in microvascular pressure. Both techniques result in considerably different estimates and neither account for interstitial fluid...

2017
Alauddin Ahmed Yiyang Liu Justin Purewal Ly D. Tran Antek G. Wong-Foy Mike Veenstra Adam J. Matzger Donald J. Siegel

Metal organic frameworks (MOFs) are promising materials for the storage of hydrogen fuel due to their high surface areas, tunable properties, and reversible gas adsorption. Although several MOFs are known to exhibit high hydrogen densities on a gravimetric basis, realizing high volumetric capacities – a critical attribute for maximizing the driving range of fuel cell vehicles – remains a challe...

Journal: :Langmuir : the ACS journal of surfaces and colloids 2016
Farzaneh Shayeganfar Rouzbeh Shahsavari

Hydrogen storage capacities have been studied on newly designed three-dimensional pillared boron nitride (PBN) and pillared graphene boron nitride (PGBN). We propose these novel materials based on the covalent connection of BNNTs and graphene sheets, which enhance the surface and free volume for storage within the nanomaterial and increase the gravimetric and volumetric hydrogen uptake capaciti...

2010
Jang Wook Choi Liangbing Hu Lifeng Cui James R. McDonough Yi Cui

Although current collectors take up more weight than active materials in most lithium ion battery cells, so far research has been focused mainly on improving gravimetric capacities of active materials. To address this issue of improving gravimetric capacities based on overall cell components, we develop freestanding nanocomposites made of carbon nanofibers (CNFs) and silicon nanowires (SiNWs) a...

Journal: :iranian chemical communication 2015
hajar soltaninejad zahra madadi tayebe bagheri lotfabad atefeh pirani negissa ebadipour

acanthophyllum laxiusculum is one of the most widely distributed species of the genus in iran that flourishes in steppe and mountainous regions of the country. in the present study, water-soluble content of a. laxiusculum roots was extracted by boiling water and further successively purified partially by a defined solvent system. surface tension measurements revealed the ability of plant extrac...

2005
R. J. Gustafsson A. Orlov C. L. Badger P. T. Griffiths R. A. Cox R. M. Lambert

The hygroscopicity of mineral aerosol samples has been examined by three independent methods: diffuse reflectance infrared Fourier transform spectroscopy, thermogravimetric analysis and differential mobility analysis. All three methods allow an evaluation of the water coverage of two samples, CaCO3 and Arizona Test dust, as a function of relative humidity. For the first time, a correlation betw...

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