Nucleation Kinetics of Calcium Phosphates on Polyelectrolyte Multilayers Displaying Internal Secondary Structure

2006 ◽  
Vol 6 (1) ◽  
pp. 327-334 ◽  
Author(s):  
Vincent Ball ◽  
Marc Michel ◽  
Fouzia Boulmedais ◽  
Joseph Hemmerle ◽  
Youssef Haikel ◽  
...  
Keyword(s):  
Secondary Structure ◽  
Calcium Phosphates ◽  
Polyelectrolyte Multilayers ◽  
Nucleation Kinetics ◽  
Kinetics Of

scholarly journals Investigation by Synchrotron Radiation Circular Dichroism of the Secondary Structure Evolution of Pepsin under Oxidative Environment

Foods ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 998
Author(s):  
Laetitia Théron ◽  
Aline Bonifacie ◽  
Jérémy Delabre ◽  
Thierry Sayd ◽  
Laurent Aubry ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Synchrotron Radiation ◽  
Secondary Structure ◽  
Proteolytic Activity ◽  
Digestive Enzyme ◽  
Structure Evolution ◽  
Food Protein ◽  
Maldi Tof ◽  
Kinetics Of ◽  
Circular Dichroïsm

Food processing affects the structure and chemical state of proteins. In particular, protein oxidation occurs and may impair protein properties. These chemical reactions initiated during processing can develop during digestion. Indeed, the physicochemical conditions of the stomach (oxygen pressure, low pH) favor oxidation. In that respect, digestive proteases may be affected as well. Yet, very little is known about the link between endogenous oxidation of digestive enzymes, their potential denaturation, and, therefore, food protein digestibility. Thus, the objective of this study is to understand how oxidative chemical processes will impact the pepsin secondary structure and its hydrolytic activity. The folding and unfolding kinetics of pepsin under oxidative conditions was determined using Synchrotron Radiation Circular Dichroism. SRCD gave us the possibility to monitor the rapid kinetics of protein folding and unfolding in real-time, giving highly resolved spectral data. The proteolytic activity of control and oxidized pepsin was investigated by MALDI-TOF mass spectrometry on a meat protein model, the creatine kinase. MALDI-TOF MS allowed a rapid evaluation of the proteolytic activity through peptide fingerprint. This study opens up new perspectives by shifting the digestion paradigm taking into account the gastric digestive enzyme and its substrate.

Observation of the nucleation kinetics of Si quantum dots on SiO2 by EFTEM

2018 ◽  
pp. 119-122
Author(s):  
G Nicotra ◽  
S Lombardo ◽  
R Puglisi ◽  
C Spinella ◽  
G Ammendola ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Nucleation Kinetics ◽  
Kinetics Of ◽  
Si Quantum Dots

The nucleation kinetics of ammonium metavanadate precipitated by ammonium chloride

2016 ◽  
Vol 441 ◽  
pp. 117-123 ◽  
Author(s):  
Guangchao Du ◽  
Zhaohui Sun ◽  
Yong Xian ◽  
Han Jing ◽  
Haijun Chen ◽  
...  
Keyword(s):  
Ammonium Chloride ◽  
Ammonium Metavanadate ◽  
Nucleation Kinetics ◽  
Kinetics Of

Nucleation rates and the kinetics of particle growth II. The birth and death process

1964 ◽  
Vol 277 (1369) ◽  
pp. 167-182 ◽  
Keyword(s):  
Steady State ◽  
Homogeneous Nucleation ◽  
Time Lag ◽  
Particle Growth ◽  
Statistical Problem ◽  
Death Process ◽  
Birth And Death Process ◽  
Growth Mechanisms ◽  
Nucleation Kinetics ◽  
Kinetics Of

The model considered in part I is generalized to include growth mechanisms in which the chemical reaction which proceeds at the particle-atm osphere interface is reversible, so that molecules may evaporate from a particle as well as condense upon it. The Becker-Döring-Zeldovich-Frenkel theory of homogeneous nucleation kinetics is then reviewed in the light of the known statistical problem of the birth -and -death process, and an improved approximation is introduced which significantly alters the calculated results. Both steady-state nucleation kinetics and the time lag problem are discussed.

Nucleation kinetics of paramagnetic and diamagnetic metal melts under a high magnetic field

2021 ◽  
Vol 73 ◽  
pp. 165-170
Author(s):  
Zhipeng Long ◽  
Qiuyue Jiang ◽  
Jiantao Wang ◽  
Long Hou ◽  
Xing Yu ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Magnetic Field ◽  
Nucleation Kinetics ◽  
Metal Melts ◽  
Kinetics Of
Sign in / Sign up

Export Citation Format

Share Document