نتایج جستجو برای: water absorption rate

تعداد نتایج: 1567425  

Background and Aim: Availability and low cost of date stones make them useful as raw material in the preparation of activated carbon. Cyanide, because of its toxicity for humans and aquatic organisms, is one of the most important health problems. The aim of the present study was to evaluate cyanide removal from aqueous solutions and determine influencing parameters in its adsorption into activa...

H. PirastehAnosheh Y. Emam

AbstractThis study was undertaken to better understand the probable mechanisms of salt stress tolerance induced by seed priming of salicylic acid (SA) in barley. The barley seeds were pre-soaked by SA or water and then sown under different saline watering regimes including 0.62 (tapwater), 5, 10 and 15 dS m-1 in petri dishes and trend of water absorbing, seedling growth, germination rate and pe...

2012
Mohd Mustafa Al Bakri Abdullah Kamarudin Hussin Mohamed Bnhussain Khairul Nizar Ismail Zarina Yahya Rafiza Abdul Razak

In this paper, we report the results of our investigation on the possibility of producing foam concrete by using a geopolymer system. Class C fly ash was mixed with an alkaline activator solution (a mixture of sodium silicate and NaOH), and foam was added to the geopolymeric mixture to produce lightweight concrete. The NaOH solution was prepared by dilute NaOH pellets with distilled water. The ...

Journal: :Journal of the American Chemical Society 2010
Matthew W Kanan Junko Yano Yogesh Surendranath Mircea Dincă Vittal K Yachandra Daniel G Nocera

A water oxidation catalyst generated via electrodeposition from aqueous solutions containing phosphate and Co(2+) (Co-Pi) has been studied by in situ X-ray absorption spectroscopy. Spectra were obtained for Co-Pi films of two different thicknesses at an applied potential supporting water oxidation catalysis and at open circuit. Extended X-ray absorption fine structure (EXAFS) spectra indicate t...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2011
Kiyoharu Nakatani Miyuki Miyanaga Yuki Kawasaki

The release of perylene from octadecylsilyl (ODS)-silica gel into water using a nonionic surfactant was kinetically studied by single microparticle injection and absorption microspectroscopy techniques. The release of perylene from the porous microparticles significantly depended on the surfactant concentration. The release rate constant was inversely proportional to the microparticle radius;...

Journal: :Scientific reports 2015
K P M Tang K H Chau C W Kan J T Fan

The water absorption and transport properties of fabrics are critical to wear comfort, especially for sportswear and protective clothing. A new testing apparatus, namely Forced Flow Water Transport Tester (FFWTT), was developed for characterizing the transplanar and in-plane wicking properties of fabrics based on gravimetric and image analysis technique. The uniqueness of this instrument is tha...

2017

Introduction: During the last decade, the trend in drug discovery has increased the number of active pharmaceutical ingredients (APIs) that exhibit high lipophilicity and poor water solubility, also associated with poor dissolution characteristics (Vogt et al., 2008). Dissolution rate in the gastrointestinal tract is the rate limiting factor for the absorption of many of these drugs, which ther...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2003
Kiyoharu Nakatani Hiroshi Kakizaki

Intraparticle mass transfer processes of Phenol Blue (PB) in single octadecylsilyl (ODS)-silica gel microparticles in acetonitrile-water were analyzed by microcapillary manipulation and microabsorption methods. An absorption maximum of PB, the sorption isotherm parameters, and the sorption rate in the microparticle system were highly dependent on the percentage of acetonitrile in solution. The ...

2016
Ting-Ting Li Ching-Wen Lou An-Pang Chen Mong-Chuan Lee Tsing-Fen Ho Yueh-Sheng Chen Jia-Horng Lin

To accelerate healing of severe hemorrhagic wounds, a novel highly absorbent hemostatic dressing composed of a Tencel®/absorbent-cotton/polylactic acid nonwoven base and chitosan/nanosilver antibacterial agent was fabricated by using a nonwoven processing technique and a freeze-drying technique. This study is the first to investigate the wicking and water-absorbing properties of a nonwoven base...

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