Applied Sciences | Free Full-Text | Corner Convergence Effect of …
An explosion inside a cabin will converge at the corners to form high-pressure areas, significantly impacting the destruction of a bulkhead structure. This paper investigates shock wave convergence characteristics at the corners when the explosive detonates at the center of the cabin, based on a combination of the wall reflection law for …Web
اقرأ أكثرHigh-Pressure Electrides: The Chemical Nature of Interstitial
Building on our previous chemical and physical model of high-pressure electrides (HPEs), we explore the effects of interaction of electrons confined in crystals but off the atoms, under conditions of extreme pressure. Electrons in the quantized energy levels of voids or vacancies, interstitial quasiatoms (ISQs), effectively interact with …Web
اقرأ أكثرThe efficacy and safety of high-pressure processing of food
High-pressure processing (HPP) is a non-thermal treatment in which, for microbial inactivation, foods are subjected to isostatic pressures (P) of 400–600 MPa with common holding times (t) from 1.5 to 6 min. ... Pathogen reductions in milk/colostrum caused by the current HPP conditions applied by the industry are lower than those achieved by ...Web
اقرأ أكثرHigh-pressure synthesis of superhard and ultrahard materials
This methodology is quite immediate and is the most widely used by research groups as proved by the synthesis of diamond 4,5 and cubic boron nitride. 42,43 Actually, the transition from an ambient pressure phase toward a high-pressure (HP) phase, denser, favors the possibility to obtain (if this HP phase is recoverable at ambient …Web
اقرأ أكثرFoods | Free Full-Text | High Hydrostatic Pressure Induced …
High-pressure processing (HPP) is a nonthermal technology used for food preservation capable of generating pasteurized milk products. There is much information regarding the inactivation of microorganisms in milk by HPP, and it has been suggested that 600 MPa for 5 min is adequate to reduce the number of log cycles by 5–7, resulting in …Web
اقرأ أكثرHigh Pressure Food Processing
HPP In high-pressure processing, foods are exposed to high pressures (300–700 MPa) for a short period, typically ranging from a few seconds to several minutes ( Farr, 1990; Mertens and Deplace, 1993 ).Web
اقرأ أكثرResearch on Oxygenation Components under a High-Pressure …
The test results show that the lifetime of the PA1010 oxygen valve under high-pressure oxygen was about 2532, and F3 was the safer material for the oxygen valve. This research provides a reference for the safety design of oxygen valves under high-pressure environments and facilitates further research into aircraft oxygen systems.Web
اقرأ أكثرModeling and simulation of high pressure water scrubbing
Absorption with water or high pressure water scrubbing (HPWS, where pressure is around 10 bar) is one of the most common technique applied in an upgrading biogas plant for simultaneous removal of CO 2 and H 2 S, due to the lower capital an operational cost implied, being a reliable and a proven technology, simple and easy to …Web
اقرأ أكثرHigh‐pressure processing of meat: Molecular impacts and …
High-pressure processing (HPP) has been the most adopted nonthermal processing technology in the food industry with a current ever-growing implementation, and meat products represent about a quarter of the HPP foods. ... With applied pressure at relatively high temperatures (60 to 76 °C), the weight loss of pressure-treated steaks …Web
اقرأ أكثرEffect of High-Pressure Technologies on Enzymes
High-pressure homogenization (HPH) is an emerging technology that can modify the structure and conformation of enzymes leading to their activation, stabilization, or inactivation based on the conditions of the treatment applied (pressure, inlet temperature, number of cycles, and others).Web
اقرأ أكثرTourniquet-induced nerve compression injuries are caused by high
The narrow distance for the changes in applied pressure to occur results in high applied pressure gradients in cuffs (b) and (c). (Reproduced with permission of Wolters Kluwer Health, Inc., from: Noordin S, McEwen JA, Kragh CJF, Eisen A, Masri BA. Surgical Tourniquets in Orthopaedics: The Journal of Bone and Joint Surgery-American …Web
اقرأ أكثرHigh Pressure Physics | Q-STEM Lab
High pressure physics: High pressure could induce various novel phenomena, due to the drastic shrinkage of atomic volume, such as enhanced electronic density, overlapped electronic orbitals. High pressure physics have been undergoing a fast advance in recent years with the combination of high pressure devices with probing techniques or new …Web
اقرأ أكثرHigh pressure processing combined with selected …
High pressure processing (HPP) as a nonthermal processing (NTP) technology can ensure microbial safety to some extent without compromising food quality. However, for vegetative …Web
اقرأ أكثرExploring the capabilities of high-pressure spark plasma sintering
The pressure that can be applied during SPS is limited by the strength of the graphite tooling/molds. Anselmi-Tamburini, Garay, and Munir [18] published in 2005 the first detailed report on modifying an SPS apparatus to apply high pressure and coined the term "high-pressure spark plasma sintering" (HPSPS). HPSPS can essentially be classified …Web
اقرأ أكثرRecent advances in high-pressure science and technology
Recently we are witnessing the boom of high-pressure science and technology from a small niche field to becoming a major dimension in physical sciences. One of the most important technological advances is the integration of synchrotron …Web
اقرأ أكثرHigh Pressure Phase-Transformation Induced Texture Evolution and
The Lattice Strains in a Specimen (Hexagonal System) Compressed Nonhydrostatically in an Opposed Anvil High Pressure Setup. Journal of Applied Physics 75, 4956–4962 (1994).Web
اقرأ أكثرLow-pressure(LPDC) vs. high-pressure die casting(HPDC)
Since of the high pressure applied when pouring – up to 1,200 bar – the bolts holding the two halves of the die together must have a high locking force. As these have a relatively high melting ...Web
اقرأ أكثرHigh-Pressure Processing Technologies for the Pasteurization …
Although the pressure applied to foods can be assumed uniform, differences in temperature–time profiles among vessel locations for HPP-treated foods can cause non-uniform effects when the kinetics of the enzyme or microbial inactivation is temperature dependent (Denys et al. 2000a; van der Plancken et al. 2008). These differences can be ...Web
اقرأ أكثرHigh Hydrostatic Pressure Treatment of Meat Products
The high pressure applied causes a temperature increase in the treated product, around 3°C per 100 MPa applied for water and 8–9°C for fat and oils and intermediated values for proteins and carbohydrates have been described [30, 38]. 2.1 Effect of HHP on food components.Web
اقرأ أكثرThe efficacy and safety of high‐pressure processing of food
High pressure processing (HPP), also referred as high-hydrostatic pressure processing (HHP) or ultra-high-pressure processing (UHP) is a non-thermal technique of food preservation that inactivates pathogens and vegetative spoilage organisms. ... The efficacy of HPP treatments will be dependent on the pressure applied, the holding time …Web
اقرأ أكثرMaterials under high pressure: a chemical perspective | Applied …
At high pressure, the typical behavior of elements dictated by the periodic table—including oxidation numbers, stoichiometries in compounds, and reactivity, to name but a few—is altered dramatically.Web
اقرأ أكثرA Review on the Effect of High Pressure Processing (HPP) on
High pressure processing (HPP) is a novel technology that involves subjecting foods to high hydrostatic pressures of the order of 100–600 MPa. This technology has been proven successful for inactivation of numerous microorganisms, spores and enzymes in foods, leading to increased shelf life. ... This technology can be effectively …Web
اقرأ أكثرAn introduction to packaging for commercial high-pressure …
The high-pressure processing (HPP) industry uses plastic polymer materials for commercial product packaging. The hydrostatic pressure principle presents HPP users the unique opportunity of exploring packaging options regardless of shape or size for both rigid and flexible packaging, allowing commercialization of foods in bottles, kegs, …Web
اقرأ أكثرApplied Sciences | Free Full-Text | High-Pressure Technologies …
Conventional extraction techniques suffer some drawbacks when applied to the exploitation of food residues, including large amounts of polluting solvents, increased time of extraction, possible degradation of the active molecules during extraction, low yields, and reduced extraction selectivity. ... an overview of high-pressure extraction ...Web
اقرأ أكثرMicrobial inactivation by high pressure processing: principle
In HPP high hydrostatic pressure is applied at 100–600 MPa for commercial processes, which is immediately and evenly transmitted through-out the product (packaged or non-packaged) using a pressure transmitting medium (PTM). Along with pressure, the temperature can be increased up to 60–65 °C to reduce microbial activity (Pinto et al., …Web
اقرأ أكثرFood Processing for Safety: What is High-Pressure Processing?
High-Pressure Processing is a newer food processing technology that enables food safety while maintaining food quality. Learn how this high-pressure technology contributes to food science and testing to help support HPP processors. ... The pressure applied only lasted for a few seconds to minutes. Therefore, it only affected …Web
اقرأ أكثرFull article: Recent Progress on High Temperature and High Pressure
Abstract. Heat exchangers for supercritical CO 2 power generation and waste heat to power conversion systems have a significant impact on the overall cycle efficiency and system footprint. Key challenges for supercritical CO 2 heat exchangers include ability to withstand high temperature and high pressure (typical temperature range of heat …Web
اقرأ أكثرHigh Blood Pressure/Hypertension
Elevated blood pressure is systolic of 120 to 129 and diastolic less than 80. Stage 1 high blood pressure is when systolic is 130 to 139 or diastolic is 80 to 89. Stage 2 high blood pressure is when systolic is 140 or higher or diastolic is 90 or higher. Even higher blood pressure (with the systolic blood pressure 180 or higher, the diastolic ...Web
اقرأ أكثرHigh-pressure processing (HPP) of meat products: Impact on …
1. Introduction. HPP has been so far the most successful nonthermal technology in the food industry, and meat products represent around 25%–30% of the high-pressure (HP)-processed foods (Jung & Tonello-Samson, 2018).HPP is nowadays a food processing technology that can be utilized by the meat industry to produce new, novel, …Web
اقرأ أكثرApplication of high-pressure technology in exploring mechanical
The rapid development of high-pressure technology makes it a powerful tool to modulate the structures of HEAs, and brings new chance for the study and optimization of mechanical properties of HEAs. ... The 10 mm Al 9 (CoCrFeMnNi) 91 HEA disk was processed by HPT for 5 turns at room temperature, 6 GPa applied pressure, and 1 …Web
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