scholarly journals Calcium Ion-Induced Structural Changes in Carboxymethylcellulose Solutions and Their Effects on Adsorption on Cellulose Surfaces

2021 ◽  
Author(s):  
Vishnu Arumughan ◽  
Tiina Nypelö ◽  
Merima Hasani ◽  
Anette Larsson
Keyword(s):  
Calcium Ion ◽  
Structural Changes

Competitive calcium ion binding to end-tethered weak polyelectrolytes

Soft Matter ◽  
2018 ◽  
Vol 14 (12) ◽  
pp. 2365-2378 ◽  
Author(s):  
Rikkert J. Nap ◽  
Sung Hyun Park ◽  
Igal Szleifer
Keyword(s):  
Calcium Ion ◽  
Structural Changes ◽  
Molecular Model ◽  
Ion Concentration ◽  
Ion Binding ◽  
Spherical Nanoparticles ◽  
Planar Surfaces ◽  
Calcium Ion Binding ◽  
Weak Polyelectrolytes

We have developed a molecular model to describe the structural changes and potential collapse of weak polyelectrolyte layers end-tethered to planar surfaces and spherical nanoparticles as a function of pH and divalent ion concentration.

scholarly journals Calcium Ion Induced Structural Changes Promote Dimerization of Secretagogin, Which Is Required for Its Insulin Secretory Function

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Jae-Jin Lee ◽  
Seo-Yun Yang ◽  
Jimin Park ◽  
James E. Ferrell ◽  
Dong-Hae Shin ◽  
...  
Keyword(s):  
Calcium Ion ◽  
Structural Changes ◽  
Secretory Function

Calcium Ion-induced Structural Changes in Bacteriophage φ X174

1994 ◽  
Vol 244 (3) ◽  
pp. 291-300 ◽  
Author(s):  
Leodevico L. Ilag ◽  
Robert McKenna ◽  
Madhav P. Yadav ◽  
James N. BeMiller ◽  
Nino L. Incardona ◽  
...  
Keyword(s):  
Calcium Ion ◽  
Structural Changes

Electrochemical Properties of Li4Ti5O12 as a Negative Electrode for Calcium Secondary Batteries in Ca(TFSI)2/THF Electrolyte

2016 ◽  
Vol 724 ◽  
pp. 97-101 ◽  
Author(s):  
Chang Hee Lee ◽  
Chang Su Kim ◽  
Soon Ki Jeong
Keyword(s):  
Calcium Ions ◽  
Calcium Ion ◽  
Structural Changes ◽  
Negative Electrode ◽  
Lithium Titanate ◽  
Lithium Titanate Oxide ◽  
Discharge Capacities ◽  
Microscopy Images ◽  
Charge Discharge ◽  
Discharge Curves

We investigated the electrochemical behavior and properties of lithium titanate oxide as the negative electrode for calcium ion batteries during charge/discharge tests in tetrahydrofuran (THF)-based electrolyte. The reversible charge and discharge capacities of ~150 and ~145 mAh g–1 were observed, respectively, in THF-based electrolyte. They are larger than those obtained in propylene carbonate-based electrolyte. Moreover, interesting charge/discharge curves were observed, which might be attributed to structural changes during the insertion/extraction of calcium ions. These results were confirmed by the charge/discharge curves and scanning electron microscopy images.

Structural Changes in Phosphatidylserine Salts by Hydration and Addition of Calcium Ion

1993 ◽  
Vol 62 (6) ◽  
pp. 2174-2179 ◽  
Author(s):  
Hiroshi Mitomo ◽  
Shodo Kobayashi ◽  
Shigeo Iwayanagi ◽  
Toshiharu Takizawa ◽  
Kouhei Hayashi
Keyword(s):  
Calcium Ion ◽  
Structural Changes

Long-range structural changes in proteinase K triggered by calcium ion removal

Nature ◽  
1989 ◽  
Vol 337 (6206) ◽  
pp. 481-484 ◽  
Author(s):  
Jürgen Bajorath ◽  
Srinivasan Raghunathan ◽  
Winfried Hinrichs ◽  
Wolfram Saenger
Keyword(s):  
Long Range ◽  
Calcium Ion ◽  
Structural Changes ◽  
Proteinase K ◽  
Ion Removal

Fine Structural Changes in the Microvasculature of the Mouse Pinna: Aging and Radiation Injury

1974 ◽  
Vol 32 ◽  
pp. 54-55
Author(s):  
S. Phyllis Steamer ◽  
Rosemarie L. Devine
Keyword(s):  
Structural Changes ◽  
Radiation Treatment ◽  
Arterial Stenosis ◽  
Ultrastructural Changes ◽  
Vascular Effects ◽  
Microvascular Changes ◽  
Surrounding Connective Tissue ◽  
Fission Neutrons ◽  
Total Body

The importance of radiation damage to the skin and its vasculature was recognized by the early radiologists. In more recent studies, vascular effects were shown to involve the endothelium as well as the surrounding connective tissue. Microvascular changes in the mouse pinna were studied in vivo and recorded photographically over a period of 12-18 months. Radiation treatment at 110 days of age was total body exposure to either 240 rad fission neutrons or 855 rad 60Co gamma rays. After in vivo observations in control and irradiated mice, animals were sacrificed for examination of changes in vascular fine structure. Vessels were selected from regions of specific interest that had been identified on photomicrographs. Prominent ultrastructural changes can be attributed to aging as well as to radiation treatment. Of principal concern were determinations of ultrastructural changes associated with venous dilatations, segmental arterial stenosis and tortuosities of both veins and arteries, effects that had been identified on the basis of light microscopic observations. Tortuosities and irregularly dilated vein segments were related to both aging and radiation changes but arterial stenosis was observed only in irradiated animals.

Evaluation of single-electron movies of glutamine synthetase molecules

1983 ◽  
Vol 41 ◽  
pp. 280-281
Author(s):  
W. Kunath ◽  
E. Zeitler ◽  
M. Kessel
Keyword(s):  
Electron Microscope ◽  
Glutamine Synthetase ◽  
Electron Irradiation ◽  
Structural Damage ◽  
Structural Changes ◽  
Single Electron ◽  
Continuous Series ◽  
Digital Recording ◽  
Recording Device ◽  
Low Exposure

The features of digital recording of a continuous series (movie) of singleelectron TV frames are reported. The technique is used to investigate structural changes in negatively stained glutamine synthetase molecules (GS) during electron irradiation and, as an ultimate goal, to look for the molecules' “undamaged” structure, say, after a 1 e/Å2 dose.The TV frame of fig. la shows an image of 5 glutamine synthetase molecules exposed to 1/150 e/Å2. Every single electron is recorded as a unit signal in a 256 ×256 field. The extremely low exposure of a single TV frame as dictated by the single-electron recording device including the electron microscope requires accumulation of 150 TV frames into one frame (fig. lb) thus achieving a reasonable compromise between the conflicting aspects of exposure time per frame of 3 sec. vs. object drift of less than 1 Å, and exposure per frame of 1 e/Å2 vs. rate of structural damage.

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