Hypersound velocities in tris-sarcosine calcium chloride at room temperature

1990 ◽  
Vol 21 (6) ◽  
pp. 371-374 ◽  
Author(s):  
C. Prieto
Keyword(s):  
Calcium Chloride ◽  
Room Temperature

Effect of Certain Cations on Relaxation of the Glycerol-Extracted Heart Muscle of Frogs

1956 ◽  
Vol 186 (2) ◽  
pp. 304-308 ◽  
Author(s):  
Lee W. Hawkins ◽  
John R. Smith
Keyword(s):  
Calcium Chloride ◽  
Heart Muscle ◽  
Room Temperature ◽  
Rapid Rate ◽  
Ventricular Contraction ◽  
Sodium Potassium ◽  
Ringer’S Solution ◽  
Contraction And Relaxation

Hearts of large bullfrogs ( Rana catesbiana) were extracted in 50% glycerol at –10 to –20°C. These hearts were then perfused with solutions of desired molarity, and contractions were measured by a compound lever attached to the ventricles. Perfusion was carried out with solutions containing magnesium, sodium, potassium or calcium chloride (using the molarities of these ions in Ringer's solution); the solutions were adjusted to ph 7.5 at room temperature. The salts were perfused singly or in various combinations. Ventricular contraction was induced by ATP (0.016 m, adjusted to ph 7.5) added directly to the perfusate. The data indicate that, following contraction of the hearts with ATP, the perfusion of Na, Mg and K cations enhance relaxation of the glycerinated hearts. Of these cations, the Na ion may be of particular importance in relaxation of the ATP-contracted muscle, for Na perfused alone caused a more rapid rate of muscle elongation. However, when the hearts were previously irrigated with Mg ion, perfusion with Na then provoked strikingly rapid relaxation of the glycerinated hearts. Ca ion was not observed to recontract the hearts after original ATP-contraction and relaxation by Na-Mg irrigation.

scholarly journals Impact of 2-Aminonicotinic Acid and/or β-Cyclodextrin on the Morphology of Metal Carbonates (M = Ca2+ and Sr2+) Crystallization

2019 ◽  
Vol 32 (2) ◽  
pp. 435-440
Author(s):  
V. Sreeram ◽  
M.V. Basaveswara Rao ◽  
Koya Prabhakara Rao
Keyword(s):  
Calcium Chloride ◽  
Room Temperature ◽  
Strontium Chloride ◽  
Particle Sizes ◽  
Mixed Surfactant ◽  
Metal Carbonates ◽  
Different Shapes ◽  
Hybrid Surfactant ◽  
Chloride Salts

We examined the crystallization impact of the surfactant, 2-aminonicotinic acid and/or β-cyclodextrin on the formation of two anhydrous metal carbonates, MCO3 (M = Ca2+ and Sr2+), from their respective calcium chloride and strontium chloride salts along with NaHCO3 at room temperature. By varying the concentrations of this hybrid surfactant to the concentrations of MCO3 during the preparations and examined their particle sizes by PXRD, FTIR, TGA and SEM. The characterization on these newly formed anhydrous metal carbonates clearly indicated that CaCO3 formed with three different shapes such as truncated calcite, hexagonal calcite and rod shaped aragonite. Whereas, SrCO3 formed with two different shapes such as hexagonal poles and bloom scale bars by varying concentrations of the surfactants. The mixed surfactant certainly made an impact on the metal carbonates formations with different shapes and sizes by varying surfactants concentrations and conditions.

scholarly journals Preparation of Triacetoneamine, I

1977 ◽  
Vol 32 (3) ◽  
pp. 328-337 ◽  
Author(s):  
G. Sosnovsky ◽  
M. Konieczny
Keyword(s):  
Gas Chromatography ◽  
Calcium Chloride ◽  
Room Temperature ◽  
Mesh Size ◽  
Mesityl Oxide ◽  
Diacetone Alcohol ◽  
Weight Yield ◽  
Optimized Conditions

The preparation of triacetoneamine (1) by the condensation of acetone with ammonia in the presence of calcium chloride at room temperature is investigated. In addition to 1, acetonin (8), diacetone alcohol (4), mesityl oxide, and diacetoneamine (7) are formed during the reaction. The progress of the reaction is monitored by gas chromatography. The effects of the extent and the rate of stirring, the amount of ammonia introduced on the critical first day of the reaction, and the mesh size and the amount of calcium chloride on the purity and weight yield of 1 are studied. The yield of 1 is maximized by recovery of the unreacted acetone. The reaction at room temperature under optimized conditions is described.

Thermal characteristics of room temperature inorganic phase change system containing calcium chloride

2015 ◽  
Vol 31 (3) ◽  
pp. 452-456 ◽  
Author(s):  
Daolin Gao ◽  
Yafei Guo ◽  
Xiaoping Yu ◽  
Shiqiang Wang ◽  
Tianlong Deng
Keyword(s):  
Phase Change ◽  
Calcium Chloride ◽  
Room Temperature ◽  
Thermal Characteristics ◽  
Change System

scholarly journals Effect of calcium chloride on the uniformity of colouring in sushi red ginger slices by modulating the properties of starch

RSC Advances ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 1664-1670
Author(s):  
Liping Jiao ◽  
Shuqin Xia ◽  
Xiaoming Zhang ◽  
Jianzeng Liu ◽  
Jingyang Yu ◽  
...  
Keyword(s):  
Calcium Chloride ◽  
Room Temperature ◽  
Red Ginger

4 mol L−1 CaCl2 change the crystallization and polarization properties of starch at room temperature, which made ginger coloring evenly.

scholarly journals Managing the Intravenous Calcium Shortage: Evaluation of Calcium Chloride Stability in 0.9% Sodium Chloride and Dextrose 5% Water Polyvinyl Chloride Bags

2012 ◽  
Vol 47 (1) ◽  
pp. 27-30 ◽  
Author(s):  
H. Kiser Tyree ◽  
R. Barber Gerard ◽  
Robinson Aubrey
Keyword(s):  
Sodium Chloride ◽  
Calcium Chloride ◽  
Polyvinyl Chloride ◽  
Chemical Stability ◽  
Room Temperature ◽  
Life Support ◽  
Physical Stability ◽  
Final Concentration ◽  
Fluorescent Light ◽  
Intravenous Calcium

Background Intravenous calcium chloride (CaCl) is commonly used by inpatient practitioners for a myriad of indications from electrolyte abnormalities to advanced cardiac life support. Currently, a paucity of data is available regarding the stability of CaCl after preparation of intravenous admixtures. Purpose This study evaluated the physical and chemical stability of CaCl 10% diluted in 0.9% sodium chloride or dextrose 5% water polyvinyl chloride bags. Method CaCl 10% solution (1000 mg) was diluted with 0.9% sodium chloride or dextrose 5% water 100 mL for injection to a final concentration of 10 mg/mL. CaCl 10% solution (2000 mg) was diluted with 0.9% sodium chloride or dextrose 5% water 150 mL for injection to a final concentration of 13.3 mg/mL. Each of the preparations were stored at room temperature (23–25°C) and exposed to fluorescent light. Samples of each preparation were analyzed on days 0, 2, 3, 5, and 7. Sterility and physical stability were assessed. Chemical stability of CaCl was evaluated by indirect potentiometry. Results CaCl 10 mg/mL and 13.3 mg/mL solutions in polyvinyl chloride bags were physically stable during the entire 7-day study period. CaCl retained >90% of the original concentration at 7 days after preparation in 0.9% sodium chloride and dextrose 5% water. Conclusion CaCl diluted to 10 mg/mL or 13.3 mg/mL with 0.9% sodium chloride or dextrose 5% water for injection is both physically and chemically stable for a period of 7 days with ≤10% degradation under conditions of room temperature with fluorescent lighting.

Rapid Estimation of Fibrinogen in Fibrinolytic and Nonfibrinolytic States

1972 ◽  
Vol 18 (7) ◽  
pp. 666-667 ◽  
Author(s):  
Arthur A Rosenberg ◽  
Richard A Peabody
Keyword(s):  
Calcium Chloride ◽  
Whole Blood ◽  
Room Temperature ◽  
Clinical Status ◽  
Fibrinogen Concentration ◽  
Rapid Estimation ◽  
End Point

Abstract Anticoagulated whole blood is serially diluted in a fibrinolytic inhibitor, then clotted with thrombin after adding calcium chloride. The clotting end point, visualized by addition of saline, is related to the concentration of clottable protein present. Protection of the forming clot against lysis is afforded by the inhibitor, by calcium chloride, and by the brief incubation at room temperature, and enables blood fibrinogen concentration to be readily discernible, even if it is less than 25 mg/100 ml. Fibrinogen in the blood is quickly estimated irrespective of the patient’s clinical status.

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