Heat capacity, enthalpy and entropy of citric acid monohydrate

1962 ◽  
Vol 58 ◽  
pp. 1511 ◽  
Author(s):  
D. M. Evans ◽  
F. E. Hoare ◽  
T. P. Melia
Keyword(s):  
Heat Capacity ◽  
Citric Acid ◽  
Citric Acid Monohydrate ◽  
Enthalpy And Entropy

Heat capacity, enthalpy and entropy of Sr14Co11O33 and Sr6Co5O15

2014 ◽  
Vol 575 ◽  
pp. 167-172 ◽  
Author(s):  
Ondřej Jankovský ◽  
David Sedmidubský ◽  
Zdeněk Sofer ◽  
Jindřich Leitner ◽  
Květoslav Růžička ◽  
...  
Keyword(s):  
Heat Capacity ◽  
Enthalpy And Entropy

scholarly journals Temperature dependence of the specific heat and thermodynamic functions AК1М2 alloy, doped strontium

2019 ◽  
Vol 21 (1) ◽  
pp. 35-42 ◽  
Author(s):  
I. N. Ganiev ◽  
S. E. Otajonov ◽  
N. F. Ibrohimov ◽  
M. Mahmudov
Keyword(s):  
Heat Capacity ◽  
Gibbs Energy ◽  
Specific Heat ◽  
Temperature Dependence ◽  
Specific Heat Capacity ◽  
Thermodynamic Functions ◽  
Inverse Relationship ◽  
Alloying Element ◽  
Enthalpy And Entropy ◽  
Increasing Temperature

In the heat «cooling» investigated the temperature dependence of the specific heat capacity and thermodynamic functions doped strontium alloy AK1М2 in the range 298,15—900 K. Mathematical models are obtained that describe the change in these properties of alloys in the temperature range 298.15—900 K, as well as on the concentration of the doping component. It was found that with increasing temperature, specific heat capacity, enthalpy and entropy alloys increase, and the concentration up to 0.5 wt.% of the alloying element decreases. Gibbs energy values have an inverse relationship, i.e., temperature — decreases the content of alloying component — is up to 0.5 wt.% growing.

Effect of fuel content on luminescence and antibacterial properties of zinc oxide nanocrystalline powders synthesized by the combustion method

RSC Advances ◽  
2016 ◽  
Vol 6 (100) ◽  
pp. 97770-97782 ◽  
Author(s):  
Trilok K. Pathak ◽  
Ashwini Kumar ◽  
C. W. Swart ◽  
H. C. Swart ◽  
R. E. Kroon
Keyword(s):  
Zinc Oxide ◽  
Citric Acid ◽  
Antibacterial Properties ◽  
Combustion Method ◽  
Zinc Nitrate ◽  
Zinc Nitrate Hexahydrate ◽  
Nanocrystalline Powders ◽  
Nitrate Hexahydrate ◽  
Citric Acid Monohydrate ◽  
Zno Powders

Nanoscale ZnO powders were synthesized via the combustion method using zinc nitrate hexahydrate as the source (oxidant) material and urea, and glycine or citric acid monohydrate as fuels.

Thermodynamics of aqueous bile salt solutions: Heat capacity, enthalpy and entropy of dilution

1981 ◽  
Vol 10 (11) ◽  
pp. 785-801 ◽  
Author(s):  
N. Rajagopalan ◽  
M. Vadnere ◽  
S. Lindenbaum
Keyword(s):  
Heat Capacity ◽  
Bile Salt ◽  
Salt Solutions ◽  
Enthalpy And Entropy

scholarly journals Prevention of Cap-Locking of Syrup Product by Treating the Manufacturing Process of Sugar Syrup with Citric Acid Monohydrate

2016 ◽  
Vol 19 (2) ◽  
pp. 190-196
Author(s):  
Mia Mohammad Dulal ◽  
Md Kaisarul Islam ◽  
Abu Asad Chowdhury ◽  
Jakir Ahmed Chowdhury
Keyword(s):  
Citric Acid ◽  
Manufacturing Process ◽  
Room Temperature ◽  
Pharmaceutical Journal ◽  
Invert Sugar ◽  
Citric Acid Monohydrate ◽  
Sugar Syrup ◽  
Bottle Neck ◽  
Zero Time

The aim of the study was to prevent crystallization of sucrose on the bottle neck and cap of sugar syrup containing products by treating the manufacturing process with citric acid monohydrate. Diphenhydramine HCl syrup was selected as a model product for the experiment. Sugar syrup (66% w/w sucrose) and partially inverted sugar syrup (in which 66% w/w sucrose was treated with citric acid monohydrate for partially conversion of sucrose into invert sugars) were prepared and the content of invert sugar of both the sugar syrups were determined. Sugar syrup and citric acid monohydrate treated sugar syrup (partially inverted) were considered as control and test sugar syrup, respectively which were used to manufacture the Diphenhydramine HCl syrup product. The Diphenhydramine HCl syrup product that prepared using sugar syrup was considered as control syrup product and that was prepared using citric acid monohydrate treated sugar syrup (partially inverted) was considered as the test syrup product. Then experiments were designed in such a way that both control (sugar syrup and product prepared by it) and test samples (partially inverted syrup and product prepared by it) were spread on open petridishes and also spread on the neck of filled bottle, inside of caps and the bottles, which were kept at room temperature (25 0C) for 2 weeks observation. At zero time and after two weeks, crystal growths of sucrose for each experiment were checked visually. No crystal was observed in open petridishes and bottle necks of partially inverted sugar syrup of Diphenhydramine HCl syrup prepared by using partially inverted sugar syrup, where content of invert sugars was more than 75 % w/w, but remarkable crystal growths were found in open petridishes and bottle necks of sugar syrup and Diphenhydramine HCl syrup prepared by using sugar syrup, where the content of invert sugars was less than 15 % w/w.Bangladesh Pharmaceutical Journal 19(2): 190-196, 2016

Effect of Treatment Conditions on Nisin Inactivation of Gram-negative Bacteria

1992 ◽  
Vol 55 (10) ◽  
pp. 763-766 ◽  
Author(s):  
KELLY A. STEVENS ◽  
BRIAN W. SHELDON ◽  
N. ARLENE KLAPES ◽  
TODD R. KLAENHAMMER
Keyword(s):  
Citric Acid ◽  
Incubation Temperature ◽  
Chelating Agent ◽  
Gram Negative Bacteria ◽  
Citric Acid Monohydrate ◽  
Gram Negative ◽  
Treatment Conditions ◽  
Effect Of Treatment ◽  
Gram Negative Organisms ◽  
Sodium Phosphate Dibasic

A method using nisin and a chelating agent to inactivate Salmonella species and other gram-negative bacteria has been developed. The objective of this study was to determine the effect of treatment conditions on the application of this method. Ten gram-negative organisms were used in this study, including six Salmonella species commonly associated with foodborne illness. Organisms were selected on the basis of sensitivity to nisin and a chelating agent. The following parameters were examined: (a) chelating agent, (b) nisin concentration, (c) incubation temperature, and (d) protein interference. Chelating agents included EDTA, ethylenebis (oxyethylene-nitrilo) tetraacetic acid, citric acid monohydrate, and sodium phosphate dibasic. The most effective treatment consisted of 50 to 100 μg/ml nisin applied in combination with 20 mM EDTA or citric acid monohydrate at a temperature range of 30 to 42°C. All of the chelators examined exhibited some inhibitory activity. The addition of bovine serum albumin to the treatments containing nisin and EDTA did not result in a significant decrease in inhibitory action.

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