A synthetic-dynamic method for water solubility measurements in high pressure CO 2 using ATR–FTIR spectroscopy

2016 ◽  
Vol 93 ◽  
pp. 386-391 ◽  
Author(s):  
Gurbuz Comak ◽  
Stéphanie Foltran ◽  
Jie Ke ◽  
Eduardo Pérez ◽  
Yolanda Sánchez-Vicente ◽  
...  
Keyword(s):  
High Pressure ◽  
Ftir Spectroscopy ◽  
Water Solubility ◽  
Dynamic Method

Modified water solubility of milk protein concentrate powders through the application of static high pressure treatment

2011 ◽  
Vol 79 (1) ◽  
pp. 76-83 ◽  
Author(s):  
Punsandani Udabage ◽  
Amirtha Puvanenthiran ◽  
Jin Ah Yoo ◽  
Cornelis Versteeg ◽  
Mary Ann Augustin
Keyword(s):  
High Pressure ◽  
Ambient Temperature ◽  
Milk Protein ◽  
Water Solubility ◽  
Sodium Caseinate ◽  
High Protein ◽  
Protein Concentrate ◽  
Milk Protein Concentrate ◽  
Enhanced Solubility ◽  
Micellar Casein

The effects of high pressure (HP) treatment (100–400 MPa at 10–60°C) on the solubility of milk protein concentrate (MPC) powders were tested. The solubility, measured at 20°C, of fresh MPC powders made with no HP treatment was 66%. It decreased by 10% when stored for 6 weeks at ambient temperature (∼20°C) and continued to decrease to less than 50% of its initial solubility after 12 months of storage. Of the combinations of pressure and heat used, a pressure of 200 MPa at 40°C applied to the concentrate before spray drying was found to be the most beneficial for improved solubility of MPC powders. This combination of pressure/heat improved the initial cold water solubility to 85%. The solubility was maintained at this level after 6 weeks storage at ambient temperature and 85% of the initial solubility was preserved after 12 months. The improved solubility of MPC powders on manufacture and on storage are attributed to an altered surface composition arising from an increased concentration of non-micellar casein in the milk due to HP treatment prior to drying. The improved solubility of high protein powders (95% protein) made from blends of sodium caseinate and whey protein isolate compared with MPC powders (∼85% protein) made from ultrafiltered/diafiltered milk confirmed the detrimental role of micellar casein on solubility. The results suggest that increasing the non-micellar casein content by HP treatment of milk or use of blends of sodium caseinate and whey proteins are strategies that may be used to obtain high protein milk powders with enhanced solubility.

High-temperature and high-pressure water solubility in ethylbenzene to 200°C and 1 kbar and the acetic acid effect

2001 ◽  
Vol 65 (19) ◽  
pp. 3319-3324 ◽  
Author(s):  
Damien Guillaume ◽  
Sergey Tkachenko ◽  
Jean Dubessy ◽  
Jacques Pironon
Keyword(s):  
High Pressure ◽  
Acetic Acid ◽  
High Temperature ◽  
Water Solubility ◽  
Acid Effect ◽  
Pressure Water

Raman scattering and photoluminescence investigation of YBO3:Eu3+ under high temperature and high pressure

2015 ◽  
Vol 3 (10) ◽  
pp. 2405-2412 ◽  
Author(s):  
W. S. Song ◽  
G. X. Y. Huang ◽  
R. C. Dai ◽  
Z. P. Wang ◽  
Z. M. Zhang
Keyword(s):  
High Pressure ◽  
Optical Properties ◽  
High Temperature ◽  
Raman Scattering ◽  
Dynamic Method ◽  
Effect Of Temperature ◽  
Temperature And Pressure

The effect of temperature and pressure on structure of YBO3:Eu was characterized by Raman scattering and on optical properties was analyzed by luminescent dynamic method.

Storage Stability and Antibacterial Activity of Eugenol Nanoliposomes Prepared by an Ethanol Injection–Dynamic High-Pressure Microfluidization Method

2015 ◽  
Vol 78 (1) ◽  
pp. 22-30 ◽  
Author(s):  
SHENGFENG PENG ◽  
LIQIANG ZOU ◽  
WEI LIU ◽  
LU GAN ◽  
WEILIN LIU ◽  
...  
Keyword(s):  
High Pressure ◽  
Antibacterial Activity ◽  
Water Solubility ◽  
Storage Stability ◽  
Biological Activities ◽  
Average Particle ◽  
Ethanol Injection ◽  
Poor Water Solubility ◽  
Dynamic High Pressure Microfluidization ◽  
Dynamic High Pressure

Eugenol is a major phenolic component with diverse biological activities. However, it is difficult to formulate into an aqueous solution due to poor water solubility, and this limits its application. In the present study, eugenol nanoliposomes (EN) were prepared by combining the ethanol injection method with the dynamic high-pressure microfluidization method. Good physicochemical characterizations of EN were obtained. The successful encapsulation of eugenol in nanoliposomes was confirmed by Fourier transform infrared spectroscopy. A good storage stability of EN was confirmed by its low variation of average particle diameter and encapsulation efficiency after 8 weeks of storage. No oil drops were found in EN after 8 weeks of storage at 4°C and at room temperature, which suggested that the poor water solubility of eugenol was overcome by nanoliposome encapsulation. Compared with that of eugenol solution, a relatively good sustained release property was observed in EN. The antibacterial activity of EN against four common foodborne pathogenic bacteria (Staphylococcus aureus, Escherichia coli, Salmonella enterica serovar Typhimurium, and Listeria monocytogenes) was evaluated in both Luria broth and milk medium.

Probing conformational and functional substates of calmodulin by high pressure FTIR spectroscopy: influence of Ca2+ binding and the hypervariable region of K-Ras4B

2016 ◽  
Vol 18 (43) ◽  
pp. 30020-30028 ◽  
Author(s):  
Nelli Erwin ◽  
Satyajit Patra ◽  
Roland Winter
Keyword(s):  
High Pressure ◽  
Ftir Spectroscopy ◽  
Target Recognition ◽  
Hypervariable Region ◽  
Pressure Perturbation ◽  
Conformational Substates

Using pressure perturbation, conformational substates of CaM could be uncovered that conceivably facilitate target recognition by exposing the required binding surfaces.

scholarly journals Structural Simulation of Mg2SiO4 under Compression

2020 ◽  
Vol 36 (4) ◽  
Author(s):  
Nguyen Hung Son ◽  
Nguyen Hoang Anh
Keyword(s):  
High Pressure ◽  
Molecular Dynamic ◽  
Molecular Dynamic Method ◽  
Dynamic Method ◽  
Bond Angle ◽  
Distribution Functions ◽  
Radial Distribution Functions ◽  
Angle Distribution ◽  
Peak Splitting ◽  
Bond Angle Distribution

The microstructure in Mg2SiO4 glass under high compression is studied by molecular dynamic method. This work revealed the correlation between pair radial distribution functions (PRDF) of Si-Si pair and bond angle distribution (BAD) of Si-O-Si and focus on clarifying the split peak of Si-Si PRDF. Moreover, visualizing the bonds of Si-Si at different pressures show changing of Si-Si bonds with pressure. In particularly, as increasing pressure, it forms corner-sharing, edge-sharing and face-sharing bond between SiOx coordination units results in the first peak splitting of Si-Si PRDF at high pressure. The results of Si-Si’s PRDF have also been analyzed and explained in detail.

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