Evaluation of the physico-chemical properties of an amorphous magnesium silicate synthesized by an ultrasound-assisted precipitation

The groundwater contaminated with cobalt is attracted more and more concern. In this study, molded magnesium silicate (MMS) was successfully prepared and the physico-chemical properties were determined by N2 adsorption/desorption isotherm and Scanning Electron Microscopy (SEM). Surface area and the average pore size were 333.19 m2·g-1 and 4.442 nm. Adsorption experiments of removal of cobalt ions was investigated as the function of initial concentration, adsorbent dose and adsorption time. Adsorption process was rapid and adsorption equilibriums were achieved soon.

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Adsorption of Nickel and Cobalt Ions on Magnesium Silicate

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.726-731.2855 ◽

2013 ◽

Vol 726-731 ◽

pp. 2855-2858

Author(s):

Hua Yang ◽

Hai Zeng Wang

Keyword(s):

Ph Value ◽

Average Pore Size ◽

Chemical Properties ◽

Magnesium Silicate ◽

Solution Ph ◽

Average Pore ◽

Cobalt Ions ◽

Physico Chemical ◽

Short Time ◽

Adsorption Desorption

Magnesium silicate (MS) was successfully prepared and the physico-chemical properties were determined by N2adsorption/desorption isotherm and Scanning Electron Microscopy (SEM). Surface area and the average pore size were 120 cm3·g-1and 10 nm. Adsorption experiments of removal of nickel and cobalt ions were investigated as the function of initial concentration, adsorbent dose, adsorption time and solution pH value. The maximum removal was reached with pH equal to 5 for the removal of nickel and cobalt ions. Adsorption process was rapid and adsorption equilibriums were attained in a short time.

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Physico-chemical properties of gelatin from bighead carp (Hypophthalmichthys nobilis) scales by ultrasound-assisted extraction

Journal of Food Science and Technology ◽

10.1007/s13197-013-1239-9 ◽

2013 ◽

Vol 52 (4) ◽

pp. 2166-2174 ◽

Cited By ~ 44

Author(s):

Zong-cai Tu ◽

Tao Huang ◽

Hui Wang ◽

Xiao-mei Sha ◽

Yan Shi ◽

...

Keyword(s):

Chemical Properties ◽

Bighead Carp ◽

Ultrasound Assisted Extraction ◽

Assisted Extraction ◽

Physico Chemical ◽

Hypophthalmichthys Nobilis ◽

Ultrasound Assisted

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Effect of ultrasound-assisted freezing on the physico-chemical properties and volatile compounds of red radish

Ultrasonics Sonochemistry ◽

10.1016/j.ultsonch.2015.04.014 ◽

2015 ◽

Vol 27 ◽

pp. 316-324 ◽

Cited By ~ 40

Author(s):

Bao-guo Xu ◽

Min Zhang ◽

Bhesh Bhandari ◽

Xin-feng Cheng ◽

Md. Nahidul Islam

Keyword(s):

Volatile Compounds ◽

Chemical Properties ◽

Physico Chemical ◽

Ultrasound Assisted ◽

Red Radish

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Decoration of specific sites on freeze-fractured membranes

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100081565 ◽

1978 ◽

Vol 36 (2) ◽

pp. 140-141

Author(s):

H. Gross ◽

H. Moor

Keyword(s):

Pure Water ◽

Freeze Fracture ◽

Chemical Properties ◽

Surface Forces ◽

Sulfate Pentahydrate ◽

Copper Sulfate Pentahydrate ◽

Physico Chemical ◽

Water Of Hydration ◽

Small Container ◽

Binding Forces

Fracturing under ultrahigh vacuum (UHV, p ≤ 10-9 Torr) produces membrane fracture faces devoid of contamination. Such clean surfaces are a prerequisite foe studies of interactions between condensing molecules is possible and surface forces are unequally distributed, the condensate will accumulate at places with high binding forces; crystallites will arise which may be useful a probes for surface sites with specific physico-chemical properties. Specific “decoration” with crystallites can be achieved nby exposing membrane fracture faces to water vopour. A device was developed which enables the production of pure water vapour and the controlled variation of its partial pressure in an UHV freeze-fracture apparatus (Fig.1a). Under vaccum (≤ 10-3 Torr), small container filled with copper-sulfate-pentahydrate is heated with a heating coil, with the temperature controlled by means of a thermocouple. The water of hydration thereby released enters a storage vessel.

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PHYSICO CHEMICAL PROPERTIES OF NICKEL OXIDE AT HIGH TEMPERATURE

Le Journal de Physique Colloques ◽

10.1051/jphyscol:1976798 ◽

1976 ◽

Vol 37 (C7) ◽

pp. C7-438-C7-442 ◽

Cited By ~ 2

Author(s):

R. FARHI ◽

G. PETOT-ERVAS

Keyword(s):

High Temperature ◽

Nickel Oxide ◽

Chemical Properties ◽

Physico Chemical

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Physico-Chemical Properties of Recombinant Desulphatohirudin

Thrombosis and Haemostasis ◽

10.1055/s-0038-1645073 ◽

1990 ◽

Vol 63 (03) ◽

pp. 499-504 ◽

Cited By ~ 4

Author(s):

A Electricwala ◽

L Irons ◽

R Wait ◽

R J G Carr ◽

R J Ling ◽

...

Keyword(s):

Molecular Weight ◽

Gel Filtration ◽

Chemical Properties ◽

Alpha Helix ◽

Apparent Molecular Weight ◽

Correlation Spectroscopy ◽

Nmr Studies ◽

Recombinant Hirudin ◽

Physico Chemical ◽

Recombinant Molecule

SummaryPhysico-chemical properties of recombinant desulphatohirudin expressed in yeast (CIBA GEIGY code No. CGP 39393) were reinvestigated. As previously reported for natural hirudin, the recombinant molecule exhibited abnormal behaviour by gel filtration with an apparent molecular weight greater than that based on the primary structure. However, molecular weight estimation by SDS gel electrophoresis, FAB-mass spectrometry and Photon Correlation Spectroscopy were in agreement with the theoretical molecular weight, with little suggestion of dimer or aggregate formation. Circular dichroism studies of the recombinant molecule show similar spectra at different pH values but are markedly different from that reported by Konno et al. (13) for a natural hirudin-variant. Our CD studies indicate the presence of about 60% beta sheet and the absence of alpha helix in the secondary structure of recombinant hirudin, in agreement with the conformation determined by NMR studies (17)

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