A Calorimetric Study of the Thermal Stability of Barstar and Its Interaction with Barnase

Biochemistry ◽  
1995 ◽  
Vol 34 (15) ◽  
pp. 5224-5233 ◽  
Author(s):  
Jose C. Martinez ◽  
Vladimir V. Filimonov ◽  
Pedro L. Mateo ◽  
Gideon Schreiber ◽  
Alan R. Fersht
Biochemistry ◽  
1994 ◽  
Vol 33 (13) ◽  
pp. 3919-3926 ◽  
Author(s):  
Jose C. Martinez ◽  
Mohamed El Harrous ◽  
Vladimir V. Filimonov ◽  
Pedro L. Mateo ◽  
Alan R. Fersht

Biochemistry ◽  
1994 ◽  
Vol 33 (46) ◽  
pp. 13787-13791 ◽  
Author(s):  
Alberto Ruiz-Arribas ◽  
Ramon I. Santamaria ◽  
Galina G. Zhadan ◽  
Enrique Villar ◽  
Valery L. Shnyrov

2001 ◽  
Vol 48 (3) ◽  
pp. 755-762 ◽  
Author(s):  
S Bem ◽  
W S Ostrowski

The solution structure and thermal stability of human prostatic acid phosphatase (hPAP) in the absence and in the presence of tartaric acid were studied by Fourier transform infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC). The temperature dependence of the infrared spectrum and DSC scans indicate that hPAP undergoes thermal unfolding at a temperature between 49.5 and 52.5 degrees C. Binding of tartaric acid does not lead to major changes in the secondary structure of hPAP, however, hPAP with bound tartaric acid shows a significantly increased thermal stability. These results helped to better understand the mechanism of hPAP unfolding at the elevated temperature.


2019 ◽  
Vol 5 (2) ◽  
Author(s):  
Cao Zhi ◽  
Yan Taihong ◽  
Bian Xiaoyan ◽  
Li Chuanbo ◽  
Zuo Chen ◽  
...  

The thermal stability of N, N-dimethylhydroxylamine (DMHAN) in the HNO3 solution was studied using microcalorimeter. The influence of concentration of HNO3, DMHAN, methylhydrazine (MH), atmosphere (air and nitrogen), and metals was investigated. The kinetic parameters and self-accelerating decomposition temperature (SADT) of the feed in process (stripping reagents 1BX, scouring agent 2DS, stripping reagents 2BX, and waste aqueous phase 2DW) were calculated by Advanced Kinetics and Technology Solutions (akts) thermokinetics software. The molar enthalpy of the reaction of NaNO2 with DMHAN and MH was also determined. The results show that the initial reaction temperature (T0) of DMHAN/HNO3 (HNO3: 1.5–3.0 mol/L, DMHAN: 0.05–0.8 mol/L) is increased as the acidity is reduced or the concentration of DMHAN is increased. Holding reductant MH made the induction period of the autocatalytic reaction longer. The air, nitrogen atmosphere, Fe, and the fission products (Zr, Ru) do not affect the decomposition of DMHAN, but the stainless steel made the T0 of DMHAN/HNO3 become lower. The SADT of 1BX/2DS, 2BX, and 2DW is 56 °C, 52 °C and 47 °C, respectively. The molar enthalpies of formation of the reaction of NaNO2 with DMHAN and MH are −411.3 kJ/mol, −246.0 kJ/mol, respectively.


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