scholarly journals RESEARCH OF THERMAL CHARACTERISTICS OF WILLOW SHOOTS BY DEVICT OF SYNCHRONOUS THERMAL ANALYSIS

2018 ◽  
Vol 37 (2) ◽  
pp. 77-84
Author(s):  
N. V. Dmytrenko ◽  
S. O. Ivanov ◽  
Yu. F. Snezhkin ◽  
L. V. Dekusha
Keyword(s):  
Thermal Analysis ◽  
Heat Capacity ◽  
Specific Heat ◽  
Thermal Characteristics ◽  
Synchronous Thermal Analysis ◽  
Heat Of Evaporation

The article presents the operation principle of the device DMKI-01 and results of determination of heat capacity and specific heat of evaporation from the tree tissues of oneyear shoots of willow.  

Development of the room temperature protocol based on room temperature ionic liquids and surfactant ionic liquids for the synthesis of derivatives of 2-amino-thiazoles and thermo-physical analysis of the synthesized derivatives using TGA-DSC.

2020 ◽  
Vol 10 ◽  
Author(s):  
Chandrakant Sarode ◽  
Sachin Yeole ◽  
Ganesh Chaudhari ◽  
Govinda Waghulde ◽  
Gaurav Gupta
Keyword(s):  
Thermal Analysis ◽  
Heat Capacity ◽  
Ionic Liquids ◽  
Specific Heat ◽  
Specific Heat Capacity ◽  
Room Temperature ◽  
Heat Capacity Data ◽  
General Strategy ◽  
Capacity Data ◽  
Derivatives Of

Aims: To develop an efficient protocol, which involves an elegant exploration of the catalytic potential of both the room temperature and surfactant ionic liquids towards the synthesis of biologically important derivatives of 2-aminothiazole. Objective: Specific heat capacity data as a function of temperature for the synthesized 2- aminothiazole derivatives has been advanced by exploring their thermal profiles. Method: The thermal gravimetry analysis and differential scanning calorimetry techniques are used systematically. Results: The present strategy could prove to be a useful general strategy for researchers working in the field of surfactants and surfactant based ionic liquids towards their exploration in organic synthesis. In addition to that, effect of electronic parameters on the melting temperature of the corresponding 2-aminothiazole has been demonstrated with the help of thermal analysis. Specific heat capacity data as a function of temperature for the synthesized 2-aminothiazole derivatives has also been reported. Conclusion: Melting behavior of the synthesized 2-aminothiazole derivatives is to be described on the basis of electronic effects with the help of thermal analysis. Additionally, the specific heat capacity data can be helpful to the chemists, those are engaged in chemical modelling as well as docking studies. Furthermore, the data also helps to determine valuable thermodynamic parameters such as entropy and enthalpy.

Determination of the specific heat capacity of healthy and tumorous human tissue

1995 ◽  
Vol 251 ◽  
pp. 199-205 ◽  
Author(s):  
K. Giering ◽  
I. Lamprecht ◽  
O. Minet ◽  
A. Handke
Keyword(s):  
Heat Capacity ◽  
Specific Heat ◽  
Specific Heat Capacity ◽  
Human Tissue

scholarly journals On the Determination of Molar Heat Capacity of Transition Elements: From the Absolute Zero to the Melting Point

2021 ◽  
Author(s):  
Ivaldo Leão Ferreira ◽  
José Adilson de Castro ◽  
Amauri Garcia
Keyword(s):  
Heat Capacity ◽  
Specific Heat ◽  
Molar Heat Capacity ◽  
Materials Science ◽  
Solid Phase ◽  
Transition Elements ◽  
Phase Nucleation ◽  
New Formulation ◽  
Solid Liquid

Molar specific heat is one of the most important thermophysical properties to determine the sensible heat, heat of transformation, enthalpy, entropy, thermal conductivity, and many other physical properties present in several fields of physics, chemistry, materials science, metallurgy, and engineering. Recently, a model was proposed to calculate the Density of State by limiting the total number of modes by solid–liquid and solid–solid phase nucleation and by the entropy associated with phase transition. In this model, the new formulation of Debye’s equation encompasses the phonic, electronic, and rotational energies contributions to the molar heat capacity of the solids. Anomalies observed in the molar specific heat capacity, such as thermal, magnetic, configurational transitions, and electronic, can be treated by their transitional entropies. Model predictions are compared with experimental scatter for transitional elements.

scholarly journals ВПЛИВ РОЗЧИННИХ РЕЧОВИН НА СТАН ВОДИ В РОСЛИННИХ ТКАНИНАХ ТА КІНЕТИКУ ЇХ СУШІННЯ

2018 ◽  
Vol 82 (1) ◽  
Author(s):  
Наталія В. Дмитренко
Keyword(s):  
Specific Heat ◽  
Bound Water ◽  
The State ◽  
Raw Material ◽  
Joint Analysis ◽  
Plant Tissues ◽  
Calorimetric Experiment ◽  
State Of Water ◽  
Heat Of Evaporation

В роботі наведено літературні дані щодо впливу розчинних речовин різного типу на процес та механізм зв’язування води. Порівняно результати визначення стану води у вихідній рослинній сировині, які були отримані з розрахунку за межею гігроскопічності, з результатами прямого експерименту за методом диференціальної сканувальної калориметрії. Встановлено, що додаткове зв’язування води, вище ніж отримане з розрахунку, обумовлено наявністю розчинних речовин в рослинному соку. Сумісним аналізом експериментальних кривих зміни стану води, енергограм сушіння, кривих сушіння та кривих швидкості сушіння показано, що критичні точки процесу сушіння знаходяться у відповідності з динамікою зміни стану води в рослинних тканинах та кінетикою зміни питомої теплоти її випаровування. Встановлено значне зростання енерговитрат на випаровування води вже в другому періоді сушіння. Отримані результати дозволяють стверджувати, що воно відбувається через початок видалення води з гідратних оболонок розчинених речовин. На підґрунті проведеного дослідження уточнено механізм і послідовність видалення води зі зрізів рослинних тканин при сушінні. The paper presents literary data on the influence of soluble substances of different types on the process and mechanism of water binding in aqueous solutions. Using the method of differential scanning calorimetry, the state of water in the parenchyma tissues of apples and potatoes, in the root crops carrots and beet, and the woody tissues of annual willow shoots was determined. A change in the state of water in these plant tissues during dehydration has been studied. The results of the determination of the state of water in the initial plant raw material obtained from the calorimetric experiment were compared with the results obtained from the calculation according to the hygroscopicity limit according to the assumptions of the sorption isotherms method. It has been established that the amount of bound water in the tissues of plants obtained from the calorimetric experiment is higher than the amount of bound water obtained on the calculation from the limit hygroscopicity of plant tissues. The additional binding of water is due to the presence of soluble substances in plant juice. Using the method of synchronous measurement of mass loss of tissues during drying and the amount of heat consumed for dehydration, an experimental determination of the specific heat of evaporation of water from plant tissues during drying was performed (the drying energy curves have obtained). Using joint analysis curves of change of the state of water in plant tissues, curves of drying energy, drying curves and drying rate curves, it was established that the critical points of the drying process are in accordance with the dynamics of changes in the state of water in plant tissues and the kinetics of the change in the specific heat of evaporation of water. A significant increase in energy consumption for the evaporation of water was detected already in the second drying period of plant tissues. The results obtained allow us to state that this increase in energy costs is due to the beginning of the removal of water from the hydrated shells of substances dissolved in plant juice. On the basis of the research, the mechanism and sequence of water removal from the cut of plant tissues during drying has been made more accurate.

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