High-hydrostatic pressure

In addition to developing solid RP structures, work has been conducted on sandwich structures such as filament-wound plastic skins with low-density foamed core or a plastic honeycomb core to develop more efficient strength-to-weight structures. Sandwich structures using a syntactic core have been successfully tested so that failures occurred at prescribed high-hydrostatic pressures of 28 MPa (4,000 psi). 

Strawberries and raspberries were submitted to high hydrostatic pressures from 200 to 800 mPa at 18 and 21°C, followed by storage at 4, 20, and 30°C. The greatest stability of the anthocyanins was observed in raspberries submitted to 200 mPa pressure followed by 800 mPa, both stored at 4°C. ... 

Suthanthangjai, W., Kajda, R, and Zabetakis, I., The effect of high hydrostatic pressure on the anthocyanins of raspberry (Rubus iudaeus). Food Chem., 90, 193, 2005. 

Buckow, R., Isbarn, S., Knorr, D., Heinz, V., and Lehmacher, A. (2008). Predictive model for inactivation of feline calidvirus, a norovirus surrogate, by heat and high hydrostatic pressure. Appl. Environ. Microbiol. 74,1030-1038. 

Chen, H., Hoover, D. G., and Kingsley, D. H. (2005). Temperature and treatment time influence high hydrostatic pressure inactivation of feline calicivirus, a norovirus surrogate. /. Food Prot. 68, 2389-2394. 

Toepfl, S., Mathys, A., Heinz, V., and Knorr, D. (2006). Review Potential of high hydrostatic pressure and pulsed electric fields for energy efficient and environmentally friendly food processing. Food Rev. Int. 22, 405-423. 

Patel, H. A., Singh, H., Anema, S. G., and Creamer, L. K. (2006). Effects of heat and high hydrostatic pressure treatments on disulfide bonding interchanges among the proteins in skim milk. /. Agric. Food Chem. 54, 3409-3420. 

Non-thermal processes other than ionizing irradiation are processes such as ultrasound, high hydrostatic pressure (HHP) and pulsed electric fields (PEFs) (Raso and Barbosa-Canovas, 2003 Ross el al., 2003). 

High hydrostatic pressure (HHP) and pulsed electric fields (PEFs) are rather novel technologies where relatively little research has been carried out. These methods have mostly been tested in combination with other decontamination methods and also mostly on either microorganisms in vitro or on foods of animal origin (e.g. milk, eggs and meat) (Raso and Barbosa-Canovas, 2003 Ross et al., 2003). More research is needed in order to find out if such methods are applicable to the fresh produce industry. 

What Is the Optimal Way in which to use High Hydrostatic Pressures to Enhance Antigen Retrieval Techniques ... 

Barophile an organism that lives optimally at high hydrostatic pressure. 

Corrales M, Toepfl S, Butz P, Knorr D and Tauscher B. 2008. Extraction of anthocyanins from grape byproducts assisted by ultrasonics, high hydrostatic pressure or pulsed electric fields a comparison. Innov Food Sci Emerg Technol 9(1) 85-91. 

High hydrostatic pressures Antioxidant capacity Strawberry puree Blackberry puree 80.6-100% 100-168% Patras and others 2009 Patras and others 2009... 

Knorr, D., Schlueter, O., and Heinz, V. 1998. Impact of high hydrostatic pressure on phase transitions of foods. Food Technol. 52, 43-45. 

FIG. 4 Effects of varying raw material treatments prior to osmotic dehydration on moisture (MC) and solid (SC) content expressed on initial dry matter (idm). Potato slices, high hydrostatic pressure (Rastogi et al., 2001) carrot slices, PFE (Rastogi et al., 1999) bell pepper disks, PFE (Ade-Omowaye et al., 2002b) and apple slices, edible coatings (Lenart and Dabrowska, 1998). 

Rastogi, N.K., Angersbach, A., and Knorr, D. 2000b. Synergistic effect of high hydrostatic pressure pre-treatment and osmotic stress on mass transfer during osmotic dehydration. J. Food Engineer. 45, 25-31. 

Suppose that a high hydrostatic pressure is applied to a crystal sample of sapphire (AI2 03 Ti +). How do you expect that the absorption spectrum of Ti + (Figure 5.4) will be affected ... 

With the technical development achieved in the last 30 years, pressure has become a common variable in several chemical and biochemical laboratories. In addition to temperature, concentration, pH, solvent, ionic strength, etc., it helps provide a better understanding of structures and reactions in chemical, biochemical, catalytic-mechanistic studies and industrial applications. Two of the first industrial examples of the effect of pressure on reactions are the Haber process for the synthesis of ammonia and the conversion of carbon to diamond. The production of NH3 and synthetic diamonds illustrate completely different fields of use of high pressures the first application concerns reactions involving pressurized gases and the second deals with the effect of very high hydrostatic pressure on chemical reactions. High pressure analytical techniques have been developed for the majority of the physicochemical methods (spectroscopies e. g. NMR, IR, UV-visible and electrochemistry, flow methods, etc.). 

Lorber, B., Jenner, G. and Giege, R. (1996). Effect of high hydrostatic pressure on nucleation and growth of protein crystals. /, Cryst. Growth 158,103-117. 

High hydrostatic pressure (HHP) processes have been used mainly for sauces or seafood and proven effective at reducing microbial populations without adverse effects on product quality (Considine et al., 2008 Brinez et al., 2006). HHP treatment causes bacterial inactivation by damaging the cell membrane, which affects membrane permeability and intracellular enzyme inactivation and possibly ruptures the plant cell wall (Kniel et al.,... 

Hartmann, C. and Delgado, A. (2004). Numerical simulation of the mechanics of a yeast cell under high hydrostatic pressure. J. Biochem 37, 977-987. 

Kniel, K. E., Shearer, A. E., Cascarino, J. L., Wilkins, G. C., and Jenkins, M. C. (2007). High hydrostatic pressure and UV light treatment of produce contaminated with Eimeria acervulina as a Cyclospora cayetanensis surrogate.. Food Prot. 70,2837-2842. 

Prestamo, G. and Arroyo, G. (1998). High hydrostatic pressure effect on vegetable structure.. Pood Sci 63, 878-881. 

In water-retaining structures or basement concrete subject to high hydrostatic pressure, materials of this type are generally not beneficial. However, some dampproofing admixtures do contain water-reducing admixtures and will result in a reduction in permeability under an applied hydrostatic head. In addition, the reduced capillary size and quantity will increase the hydrostatic pressure required to enter the concrete surface (see later). 

Cold seeps are also areas of high hydrostatic pressure, rich in molhisks, particularly mytilids, which thrive on hydrogen sulfide from bacterial decomposition of sunken wood or whale bones (Distel 2000). 

McClements, J. M. J., Patterson, M. F., Linton, M. (2001). The effect of growth stage and growth temperature on high hydrostatic pressure inactivation of some psychrotrophic bacteria in milk. J. Food Pro., 64, 514-522. 

AS No. 2 (optional) 0.001-0.01% d 1.7 vel of deton 5000 m/sec temp of expln-not given. To initiate hydrobel chges under high hydrostatic pressure, it is necessary to use a specially designed Cu tube submarine electric detonators Ref . McAdam Westwater Mining Explosives, Oliver Boyd, Edinburgh (1958), p 109 NOTE The compn of AS No 2 is not reported... 

Pressure cycling high hydrostatic pressure (e.g., 500 Mpa) induces disintegration of casein micelles and reassociation on pressure reduction Hydrophobic casein particles, formed under pressure, reassociate into smaller and more irregularly shaped aggregates Dickinson 2006a... 

Abbasi, S., Dickinson, E. (2004). Gelation of t-carrageenan and micellar casein mixtures under high hydrostatic pressure. Journal of Agricultural and Food Chemistry, 52, 1705-1714. 

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