Isothermal decomposition of HMX before and after thermally induced β–δ crystal transformation

CrystEngComm ◽  
2021 ◽  
Author(s):  
Huan Peng ◽  
Jian Guan ◽  
Qilong Yan ◽  
Xiaolong Fu ◽  
Bo Jin ◽  
...  
Keyword(s):  
Kinetic Parameters ◽  
Constant Temperature ◽  
Isothermal Decomposition ◽  
Decomposition Kinetic ◽  
Measuring Device ◽  
Thermally Induced ◽  
Crystal Transformation ◽  
Temperature Decomposition ◽  
Before And After ◽  
Crystal Phases

The β–δ crystal transformation of HMX is examined using a self-made constant temperature decomposition gas measuring device, and the isothermal decomposition kinetic parameters of HMX with different crystal phases are obtained.

Kinetic parameters of the non-isothermal decomposition of Cu(II) chelates of o-hydroxychalcones

1988 ◽  
Vol 131 ◽  
pp. 299-301 ◽  
Author(s):  
R.S. Naidu ◽  
E.N. Rao ◽  
R. Ruby ◽  
K.G. Mallikarjun
Keyword(s):  
Kinetic Parameters ◽  
Isothermal Decomposition

scholarly journals Effect of N-Methylacetamide Concentration and Thawing Rate on Chicken Sperm Quality after Cryopreservation

Animals ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 824
Author(s):  
Fabio Mosca ◽  
Luisa Zaniboni ◽  
Ahmad Abdel Sayed ◽  
Nicolaia Iaffaldano ◽  
Dominga Soglia ◽  
...  
Keyword(s):  
Cell Membrane ◽  
Kinetic Parameters ◽  
Sperm Quality ◽  
Membrane Integrity ◽  
Motile Sperm ◽  
Cell Membrane Integrity ◽  
Before And After ◽  
Freezing Procedure ◽  
Thawing Rate

In seeking alternative cryoprotectants to glycerol for a reference chicken semen freezing procedure, the aim of the present study was to compare the effect of two concentrations of N-Methylacetamide (MA) and two thawing rates on the quality of frozen-thawed semen. Semen samples were diluted in Lake pre-freezing extender, including 0.1 M trehalose in presence of 6% or 9% MA, loaded into straws, frozen in nitrogen vapors, and stored in liquid nitrogen. The following thawing treatments were used: 5 °C for 100 s and 38 °C for 30 s. Sperm quality (cell membrane integrity, motility and kinetic parameters) was assessed before and after cryopreservation. The decrease of MA concentration from 9 to 6% improved sperm quality after freezing/thawing and this effect was dependent on thawing temperature. Decreasing the MA concentration from 9 to 6% improved the proportion of undamaged membrane, motile, and progressive motile sperm recovered after thawing at 5 °C for 100 s; in contrast, no effect of the MA concentration was observed thawing at 38 °C for 30 s. Therefore, the treatment with 6% MA and thawing at 5 °C for 100 s has given the best cryoprotective action. These results contribute to improve the efficacy of the current chicken semen cryopreservation procedures.

scholarly journals Thermally induced conformational changes and protein–protein interactions of bovine serum albumin in aqueous solution under different pH and ionic strengths as revealed by SAXS measurements

2017 ◽  
Vol 19 (26) ◽  
pp. 17143-17155 ◽  
Author(s):  
Dmitry Molodenskiy ◽  
Evgeny Shirshin ◽  
Tatiana Tikhonova ◽  
Andrey Gruzinov ◽  
Georgy Peters ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Bovine Serum Albumin ◽  
Serum Albumin ◽  
Conformational Changes ◽  
Interaction Potential ◽  
Protein Interactions ◽  
Bovine Serum ◽  
Protein Protein Interactions ◽  
Thermally Induced ◽  
Before And After

Temperature-induced oligomerization of albumin before and after protein melting was studied using SAXS and interpreted in terms of interaction potential.

THE FECUNDITY OF AEDES HEXODONTUS DYAR (CULICIDAE) IN THE LABORATORY

1955 ◽  
Vol 33 (6) ◽  
pp. 420-427 ◽  
Author(s):  
C. A. Barlow
Keyword(s):  
Constant Temperature ◽  
Blood Meal ◽  
Minimum Amount ◽  
Egg Development ◽  
Laboratory Conditions ◽  
Before And After ◽  
The Mean ◽  
Definite Correlation

The numbers of eggs laid by 654 Aedes hexodontus females, captured in the field, were examined under laboratory conditions in relation to three variables: nutrition, weight, and date of capture of the individuals. Females were weighed before and after engorging with blood and maintained in individual cages at a constant temperature of 20 °C. The mean fecundity of 198 females was 62.3 ± 2.16 eggs. A blood meal was necessary for oviposition in 95% of the individuals. Five per cent of the females oviposited without a blood meal. A diet of a single blood meal and water was insufficient for oviposition and either sugar or raisins was required to supplement the single blood meal. There was a definite correlation between weight and fecundity. Vertebrate blood was a stimulus to egg development. A critical minimum amount of blood was required to initiate ovulation, but blood in excess of this did not increase the number of eggs. No correlation was shown between the fecundity of females in the laboratory and the date of their capture.

scholarly journals Non-Isothermal Decomposition of 2-(2-Hydroxybenzylideneamino)-3-phenylpropanoic Acid in Nitrogen Atmosphere

2011 ◽  
Vol 8 (2) ◽  
pp. 819-829
Author(s):  
M. Vennila ◽  
G. Manikandan ◽  
V. Thanikachalam ◽  
J. Jayabharathi
Keyword(s):  
Schiff Base ◽  
Kinetic Parameters ◽  
Nitrogen Atmosphere ◽  
Probable Mechanism ◽  
Isothermal Decomposition ◽  
Heating Rates ◽  
Ft Ir ◽  
Three Stages ◽  
Tg Studies ◽  
Decomposition Properties

The non-isothermal decomposition properties of 2-(2-hydroxy- benzylideneamino)-3-phenylpropanoic acid [HBAPPA] have been studied using microanalysis, FT-IR, UV, DTA, DTG and TG techniques. The TG studies were carried out at different heating rates of 10, 15 and 20 K/min. The Schiff base decomposed in three stages. The kinetic parameters were deduced for each stage. A probable mechanism has been proposed for the decomposition process.

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