scholarly journals Теплоемкость твердых растворов системы Er-=SUB=-2-=/SUB=-Ge-=SUB=-2-=/SUB=-O_7- Er-=SUB=-2-=/SUB=-Sn-=SUB=-2-=/SUB=-O-=SUB=-7-=/SUB=- в области 350-1000 K

2019 ◽  
Vol 61 (4) ◽  
pp. 660
Author(s):  
Л.Т. Денисова ◽  
Л.А. Иртюго ◽  
В.В. Белецкий ◽  
Н.В. Белоусова ◽  
В.М. Денисов
Keyword(s):  
Solid Solution ◽  
Differential Scanning Calorimetry ◽  
Solid State ◽  
Specific Heat ◽  
Solid Solutions ◽  
Thermodynamic Functions ◽  
Solution Composition ◽  
Scanning Calorimetry ◽  
Solid Solution Composition ◽  
Effects Of Temperature

AbstractEr_2Ge_2O_7–Er_2Sn_2O_7 solid solutions have been obtained using solid-state synthesis by burning the stoichiometric mixtures of the initial oxides in air in the temperature range of 1273–1473 K. The effects of temperature and solid solution composition on the specific heat have been examined by differential scanning calorimetry. The Er_2Ge_2O_7 thermodynamic functions have been calculated.

Mineral analysis of river sand around Mt. Tsukuba for provenance estimation of Atamadai type pottery (2500–1500 BC) from Hinoki site (Tochigi, Japan)

2019 ◽  
Vol 34 (2) ◽  
pp. 159-163
Author(s):  
S. Ichikawa ◽  
Y. Sakito ◽  
T. Kurisaki
Keyword(s):  
Solid Solution ◽  
Solid Solutions ◽  
Manufacturing Process ◽  
Mineral Analysis ◽  
Solution Composition ◽  
River Sand ◽  
Solid Solution Composition ◽  
X Ray ◽  
Geological Characteristics ◽  
Mineral Analyses

A total of 77 pottery shards originating from the Middle Jomon period (2500–1500 BC) were excavated from the Hinoki site in Tochigi, Japan. Fifty-five of those were Atamadai type pottery, which might contain some temper fragments from the manufacturing process. The pottery shards were analyzed by X-ray diffractometry (XRD). The mineral analyses were compared with the river sands around Mt. Tsukuba to demonstrate the temper's origin of the Atamadai type pottery. Their XRD profiles revealed the following solid solutions which could be fingerprint minerals: biotite for the temper and plagioclase, and hornblende for the clay and temper. These minerals might indicate the origin of each sample because their d-spacings depended on the solid solution composition reflecting their geological characteristics.

Electrochemical and Specific Heat Measurements on Tellurium-Halogen Systems

1979 ◽  
Vol 34 (8) ◽  
pp. 969-975 ◽  
Author(s):  
J. Haag ◽  
U. v. Alpen ◽  
E. Gmelin ◽  
A. Rabenau
Keyword(s):  
Differential Scanning Calorimetry ◽  
Solid State ◽  
Specific Heat ◽  
Temperature Dependence ◽  
Enthalpies Of Formation ◽  
Free Energies ◽  
Silver Halides ◽  
Scanning Calorimetry ◽  
Specific Heats ◽  
Galvanic Cells

AbstractGibbs free energies of reaction in the systems Te-TeX4 (X = Cl, Br, I) were determined from e.m.f. measurements of solid state galvanic cells using silver halides as auxiliary electrolytes. From the temperature dependence of the e.m.f. the standard entropies and enthalpies of formation S0 (298.15 K) and ⊿Hf0 (298.15 K) have been calculated for α-TeI, TeI4 , Te2 Br, TeBr4 , Te3Cl2 and TeCl4 . The specific heats of α-Tel and Te2Br were determined from 1.5 K to 300 K by adiabatic and differential scanning calorimetry.

scholarly journals Высокотемпературная теплоемкость TmBiGeO-=SUB=-5-=/SUB=- и YbBiGeO-=SUB=-5-=/SUB=-

2018 ◽  
Vol 60 (2) ◽  
pp. 262
Author(s):  
Л.Т. Денисова ◽  
Н.В. Белоусова ◽  
Н.А. Галиахметова ◽  
В.М. Денисов ◽  
Е.О. Голубева
Keyword(s):  
Differential Scanning Calorimetry ◽  
High Temperature ◽  
Solid State ◽  
Thermodynamic Properties ◽  
Specific Heat ◽  
Solid State Synthesis ◽  
Scanning Calorimetry ◽  
Enthalpy And Entropy

AbstractThe TmBiGeO_5 and YbBiGeO_5 compounds have been synthesized from Tm_2O_3 (Yb_2O_3), Bi_2O_3, and GeO_2 oxides by the solid-state synthesis with successive burning at 1003, 1073, 1123, 1143, 1173, and 1223 K. High-temperature specific heat of the oxide compounds has been measured by differential scanning calorimetry. Basing on the experimental dependences C _p = f ( T ), the thermodynamic properties of the oxide compounds, i.e., the enthalpy and entropy variations, have been calculated.

The impact of solid-solution composition on kinetics and mechanism of [2+2] photodimerizations of cinnamic acid derivatives

CrystEngComm ◽  
2021 ◽  
Author(s):  
Lorenzo Pandolfi ◽  
ANDREA GIUNCHI ◽  
Tommaso Salzillo ◽  
Aldo Brillante ◽  
Raffaele Guido Guido Della Valle ◽  
...  
Keyword(s):  
Solid Solution ◽  
General Formula ◽  
Solid Solutions ◽  
Cinnamic Acid ◽  
Kinetics And Mechanism ◽  
Solution Composition ◽  
Cinnamic Acid Derivatives ◽  
Solid Solution Composition ◽  
The Impact

We propose the use of solid-solutions for the modulation of the kinetic in [2+2] photocycloaddition. Solid-solutions with general formula [1H]BrxCl1-x (1 = 4-amino-cinnamic acid; 0 < x < 1) were...

One-Step Simultaneous Differential Scanning Calorimetry-FTIR Microspectroscopy to Quickly Detect Continuous Pathways in the Solid-State Glucose/Asparagine Maillard Reaction

2013 ◽  
Vol 96 (6) ◽  
pp. 1362-1364 ◽  
Author(s):  
Deng-Fwu Hwang ◽  
Tzu-Feng Hsieh ◽  
Shan-Yang Lin
Keyword(s):  
Differential Scanning Calorimetry ◽  
Solid State ◽  
Maillard Reaction ◽  
Reaction Pathway ◽  
Molar Ratio ◽  
Maillard Reaction Products ◽  
Reaction Products ◽  
Scanning Calorimetry ◽  
Ftir Microspectroscopy ◽  
Amadori Product

Abstract The stepwise reaction pathway of the solid-state Maillard reaction between glucose (Glc) and asparagine (Asn) was investigated using simultaneous differential scanning calorimetry (DSC)-FTIR microspectroscopy. The color change and FTIR spectra of Glc-Asn physical mixtures (molar ratio = 1:1) preheated to different temperatures followed by cooling were also examined. The successive reaction products such as Schiff base intermediate, Amadori product, and decarboxylated Amadori product in the solid-state Glc-Asn Maillard reaction were first simultaneously evidenced by this unique DSC-FTIR microspectroscopy. The color changed from white to yellow-brown to dark brown, and appearance of new IR peaks confirmed the formation of Maillard reaction products. The present study clearly indicates that this unique DSC-FTIR technique not only accelerates but also detects precursors and products of the Maillard reaction in real time.

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