Rabbit liver transglutaminase: physical, chemical, and catalytic properties

Biochemistry ◽  
1977 ◽  
Vol 16 (25) ◽  
pp. 5495-5501 ◽  
Author(s):  
Takashi Abe ◽  
Soo Il Chun ◽  
Richard P. DiAugustine ◽  
J. E. Folk
Keyword(s):  
Catalytic Properties ◽  
Rabbit Liver ◽  
Physical Chemical

scholarly journals PHYSICAL CHEMICAL STUDIES OF THE SURFACTANT DILAURYLDIMETHYLAMMONIUM BROMIDE (DLDMAB): AGGREGATION AND CATALYTIC PROPERTIES

2009 ◽  
Vol 17 (17) ◽  
pp. 21-32
Author(s):  
Elizabeth Fatima de Souza ◽  
Silvia Dani ◽  
Lavinel G. IONESCU
Keyword(s):  
Thermodynamic Parameters ◽  
Catalytic Properties ◽  
Activation Parameters ◽  
Critical Micellar Concentration ◽  
Physical Chemical ◽  
Chemical Studies ◽  
Diphenyl Phosphate ◽  
C 32 ◽  
Free Energy Of Micellization ◽  
Hydrolysis Of

The micellization of dilauryldimethylammonium bromide (DLDMAB) in water was studied by using surface tension measurements. The critical micellar concentration (CMC) was determined at 25°C, 32°C and 40°C and thermodynamic parameters such as the free energy of micellization (∆G°mic), enthalpy (∆H°mic), and entropy (∆S°mic) of micellization were measured. The CMC at 25°C was 4.93 x 10-5 M and the corresponding values of the thermodynamic parameters were: ∆G°mic = -5.87 kcal/mol; ∆H°mic = -1.12 kcal/mol and ∆S°mic = +16.00 e.u. Micelles of the surfactant DLDMAB act as catalysts for the alkaline hydrolysis of p-nitrophenyl diphenyl phosphate (NPDPP) with a maximum catalytic factor of approximately 120 compared to 80 for CTAB. Typical activation parameters measured for 1.00 x 10-3 M surfactant and 0.005 M NaOH were: Ea = 9.7 kcal/mo/; ∆H°≠ = 9.1 kcal/mol; ∆G°≠ = 19.6 kcal/mol and ∆S°≠ = -33.9 e.u. The kinetic results were also analyzed in terms of the pseudo-phase ion-exchange models (PPIE) and showed that the model is applicable to describe the experimental results.

Study on the Preparation of Nano-Cu2O and its Morphology Control

2011 ◽  
Vol 328-330 ◽  
pp. 1355-1358 ◽  
Author(s):  
Bin Zhao ◽  
Di Ma
Keyword(s):  
Room Temperature ◽  
Catalytic Properties ◽  
Chemical Properties ◽  
Morphological Structure ◽  
Morphology Control ◽  
Nano Particles ◽  
Preparation Methods ◽  
Physical Chemical ◽  
Application Fields ◽  
Application Prospects

Nano-Cu2O has wide application prospects in the fields of chemical industry and engineering due to its special optical, electrical and catalytic properties. The nano-particles with different morphological structure and particle size have different physical-chemical properties and different application fields. Therefore, this article reviewed the preparation methods of Nano-Cu2O at high/room temperature and the key point of its morphology control.

scholarly journals PHYSICAL CHEMICAL STUDIES OF THE AGGREGATION AND CATALYTIC PROPERTIES OF THE SURFACTANT CETYLDIMETHYLETHYLAMMONIUM BROMIDE (CDEAB)

1999 ◽  
Vol 7 (8) ◽  
pp. 105-114
Author(s):  
Lavinel G. Ionescu ◽  
Silvia Dani ◽  
Elizabeth Fatima de Souza
Keyword(s):  
Free Energy ◽  
Catalytic Properties ◽  
Activation Parameters ◽  
Critical Micellar Concentration ◽  
Physical Chemical ◽  
Chemical Studies ◽  
Diphenyl Phosphate ◽  
Free Energy Of Micellization ◽  
Surface Tensiometry ◽  
Hydrolysis Of

The micellization of cetyldimethylethylammonium bromide (CDEAB) in water was studied by means of surface tensiometry. The critical micellar concentration (CMC) was determined at 25°, 32°, and 40°C, and thermodynamic properties such as the free energy of micellization (∆G°mic), enthalpy (∆H°mic) and entropy (∆S°mic) of micellization were measured. The CMC at 25°C was 9.05 x 10-4 M and the corresponding values of the thermodynamic parameters were: ∆G°mic = -4.15 kcal/mol; ∆H°mic = -1.37 kcal/mol and ∆S°mic = + 9.33 e.u. Micelles of the surfactant CDEAB were good catalysts for the alkaline hydrolysis of p-nitrophenyl diphenyl phosphate (NPDPP) with a maximum catalytic factor of approximately 80, comparable to that of CTAB. Typical activation parameters measured for 0.005 M NaOH were: Ea = 9.0 kcal/mol; ∆H°≠ = 8.4 kcal/mol; ∆G°≠ = 19.2 kcal/mol and ∆S°≠ = -36.3 e.u. The kinetic results were also analyzed in terms of the pseudo-phase ion-exchange models (PPIE) and showed that the model is applicable and gave reasonable fits

Mung bean nuclease I. 6. Physical, chemical, and catalytic properties

Biochemistry ◽  
1976 ◽  
Vol 15 (20) ◽  
pp. 4457-4463 ◽  
Author(s):  
David Kowalski ◽  
Warren D. Kroeker ◽  
M. Laskowski
Keyword(s):  
Mung Bean ◽  
Catalytic Properties ◽  
Mung Bean Nuclease ◽  
Physical Chemical

Synthesis, physical–chemical, and catalytic properties of mixed compositions Ag/H3PMo12O40/SiO2

2011 ◽  
Vol 107 (2) ◽  
pp. 453-461 ◽  
Author(s):  
Yu. Trach ◽  
V. Sydorchuk ◽  
O. Makota ◽  
S. Khalameida ◽  
R. Leboda ◽  
...  
Keyword(s):  
Catalytic Properties ◽  
Physical Chemical
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