Adsorption and equilibrium adsorption modeling of bivalent metal cations on viscose rayon succinate at different pHs

2007 ◽  
Vol 67 (4) ◽  
pp. 312-321 ◽  
Author(s):  
A. Dashkhuu Khasbaatar ◽  
Young Gun Ko ◽  
Ung Su Choi
Keyword(s):  
Viscose Rayon ◽  
Metal Cations ◽  
Equilibrium Adsorption ◽  
Bivalent Metal ◽  
Adsorption Modeling

Complexes of bivalent metal cations in electrospray mass spectra of common organic compounds

2002 ◽  
Vol 37 (6) ◽  
pp. 617-622 ◽  
Author(s):  
Tomasz Bie?kowski ◽  
Agnieszka Brodzik-Bie?kowska ◽  
Witold Danikiewicz
Keyword(s):  
Organic Compounds ◽  
Mass Spectra ◽  
Metal Cations ◽  
Bivalent Metal

scholarly journals Preparation and general properties of a soluble adenosine triphosphatase from mitochondria

1967 ◽  
Vol 105 (1) ◽  
pp. 279-288 ◽  
Author(s):  
M J Selwyn
Keyword(s):  
Adenosine Triphosphatase ◽  
Metal Cations ◽  
Coupling Factor ◽  
Heart Mitochondria ◽  
Aqueous Extracts ◽  
Bivalent Metal ◽  
Adenosine Triphosphatase Activity ◽  
General Properties ◽  
Kinetics Of

1. The purification of an adenosine triphosphatase present in aqueous extracts of acetone-dried ox-heart mitochondria is described. 2. No evidence was found for the presence of more than one protein having adenosine-triphosphatase activity in these extracts. 3. The enzyme is less stable at 0° than at 25° but is stabilized by glycerol. 4. The activity is dependent on the presence of Mg2+ or certain other bivalent metal cations. 5. The adenosine-triphosphatase activity of the Mg2+-activated enzyme is enhanced by 2,4-dinitrophenol. 6. The kinetics of Mg2+ activation indicate that the ATP–Mg2+ complex is the important substrate: free ATP and Mg2+ are inhibitory. 7. This preparation of mitochondrial adenosine triphosphatase has many properties in common with the adenosine triphosphatase coupling factor from mitochondria (Racker, 1961).

An X-ray diffraction study of complexes of DNA and lactosyl-functionalised liposomes induced by bivalent metal cations: coexistence of different symmetries

2012 ◽  
Vol 40 (2) ◽  
pp. 137-148 ◽  
Author(s):  
Michela Pisani ◽  
Giovanna Mobbili ◽  
Milvia Marini ◽  
Oriano Francescangeli ◽  
Valerio Mori ◽  
...  
Keyword(s):  
Diffraction Study ◽  
Metal Cations ◽  
X Ray Diffraction ◽  
Bivalent Metal ◽  
X Ray

Molecular Models of the Stabilization of Bivalent Metal Cations in Zeolite Catalysts

2011 ◽  
pp. 579-643 ◽  
Author(s):  
G. M. Zhidomirov ◽  
A. A. Shubin ◽  
A. V. Larin ◽  
S. E. Malykhin ◽  
A. A. Rybakov
Keyword(s):  
Metal Cations ◽  
Zeolite Catalysts ◽  
Molecular Models ◽  
Bivalent Metal

Production and properties of α-amylase fromBacillussp. BKL20

2010 ◽  
Vol 56 (4) ◽  
pp. 279-288 ◽  
Author(s):  
Olha I. Kubrak ◽  
Janet M. Storey ◽  
Kenneth B. Storey ◽  
Volodymyr I. Lushchak
Keyword(s):  
High Activity ◽  
Yeast Extract ◽  
Culture Medium ◽  
Metal Cations ◽  
Culture Conditions ◽  
Bacillus Sp ◽  
Good Resistance ◽  
Bivalent Metal ◽  
Maximum Production ◽  
Ph Range

As a result of screening Bacillus sp. strains isolated from different natural substrates, strain BKL20 was identified as a producer of a thermostable alkaline α-amylase. Maximum production of this α-amylase was achieved by optimizing culture conditions. Production of α-amylase seemed to be independent of the presence of starch in the culture medium and was stimulated by the presence of peptone (0.3%, m/v) and yeast extract (0.2%, m/v). The enzyme was thermostable and retained amylolytic activity after 30 min of incubation at 60 and 70 °C. High activity was maintained over a broad pH range, from 6.0 to 11.0, and the enzyme remained active after alkaline incubation for 24 h. Bacillus sp. BKL20 α-amylase was not stimulated by Ca2+or other bivalent metal cations and was not inhibited by EGTA or EDTA at 1–10 mmol/L, suggesting that this α-amylase is a Ca2+-independent enzyme. It also showed good resistance to both oxidizing (H2O2) and denaturating (urea) agents.

scholarly journals Fourier Transform Infrared Spectroscopy Study on Cation adsorption on Viscose Rayon Succinate

2014 ◽  
Vol 12 ◽  
pp. 136-141 ◽  
Author(s):  
D Khasbaatar ◽  
Ung Su Choi
Keyword(s):  
Heavy Metals ◽  
Metal Ions ◽  
Viscose Rayon ◽  
Succinic Anhydride ◽  
Metal Adsorption ◽  
Spectroscopy Study ◽  
Bivalent Metal ◽  
Suitable Material ◽  
Bivalent Metal Ions ◽  
Ft Ir

Ion-exchange materials have been considered as suitable material for the recovery of heavy metals in water. A viscose rayon succinate, synthesized from viscose rayon and succinic anhydride in presence of DMSO, to remove trace bivalent metal ions such as Ag+, Cu2+, Ni2+, Pb2+, Zn2+ and Cr3+, was studied using FT-IR for the behavior of metal adsorption. Both esterification and carboxyl bonding of viscose rayon succinate were assigned essentially at 1729 and 1693cm-1, respectively. And the essential band of bonding between metal and the material was determined at 1625cm-1. The available adsorption capacity of this fiber was 6.2 mequiv/g. The adsorption of metal ions on the viscose rayon succinate follows the order of Cu2+>Cr3+>Ni2+>Pb2+>Zn2+>Ag+ with maximum adsorptions capacities 4.2, 1.42, 0.91, 0.83, 0.69 and 0.35 mmol/g, respectively.DOI: http://dx.doi.org/10.5564/mjc.v12i0.189 Mongolian Journal of Chemistry Vol.12 2011: 136-141

scholarly journals Effects of Bivalent Metal Cations on the Conformation and Aggregation of Poly(L-glutamic acid)

1986 ◽  
Vol 59 (2) ◽  
pp. 587-591 ◽  
Author(s):  
Hiroshi Maeda ◽  
Tsuyoshi Hiramatsu ◽  
Shoichi Ikeda
Keyword(s):  
Glutamic Acid ◽  
Metal Cations ◽  
Bivalent Metal
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