high pressure method

Influence of Ultra-High-Pressure Pretreatment Method on …

Anneslea fragrans Wall., an edible and medicinal plant, is traditionally used to treat liver and gastrointestinal diseases. This paper aimed to investigate the influence of ultra-high pressure (UHP) pretreatment on the phenolics profiling, antioxidant, and cytoprotective activities of free (FP), esterified (EP), and bound (BP) phenolics from A. …

High-Pressure Injection Grouting Method Introduction|

The high-pressure injection grouting method is a displacement technique that utilizes high-pressure water, compressed air, and high-pressure grout. It involves injecting them into the ground through small-diameter nozzles to cut through and affect the surrounding soil. Taking advantage of the air density < water < grout characteristics, this ...

Study on Structural Evolution of Synthetic …

Abundant and cheap lignite is regarded as inferior fuel due to its disadvantages such as low heat and high moisture. In order to realize the high value and clean, non-fuel utilization of lignite, we used lignite as …

Strategies for hardening purity metallic materials by high pressure …

The rates of pressure increase and release are 0.01 GPa/s and 0.008 GPa/s, respectively, and the holding time is 12 min for all experiments. The pressure of the high-pressure chamber was calibrated with Bi, Ba, and Tl as the pressure calibration material, and the oil pressure vs chamber pressure relationship was also obtained in advance.

Design and fabrication of graded cBN tool materials through high

In this paper, in order to balance the wear resistance and fracture toughness of cBN tool materials, the graded cBN composites were fabricated through high temperature high pressure method. Mechanical properties had been conducted to optimize the thickness ratio, graded component and the sintering process.

High-pressure chemistry

High-pressure phenomena and reaction pathways, structure transformations and transitions between solids, liquids, gases, or supercritical phases. ... Compression is a common densification method ...

High-pressure Hydrodynamic Injection as a Method of …

Abstract. Among several existing mouse models for hepatitis B virus (HBV) infection, the high-pressure hydrodynamic injection (HDI) method is frequently used in HBV research due to its economic advantages and ease of implementation. The use of the HDI method is influenced by factors such as mouse genetic background, age, , and the type of ...

High Pressure Experimental Methods | Semantic …

2008. TLDR. New areas of thermodynamic exploration of phase diagrams, polymorphism, transformations between different phases and cohesion forces, …

A Concise Review of Catalytic Synthesis of Methanol from

The high-pressure method cannot compete with low- and medium-pressure methods, so it is being phased out. Since the mid−1970s, almost all new or expanded methanol factories in the world have adopted low- or medium-pressure methods. The following are the representative methods among them:

Materials discovery at high pressures | Nature …

By altering interatomic distances and bonding patterns ( Box 1 ), high pressure can change the energetic stability of the various possible structures and thus generate new materials through...

Critical parameters investigation of rock breaking by high-pressure

High-pressure method for the fracture and stripping of concrete structures. Mag Concr Res, 53 (4) (2001), pp. 233-238. View in Scopus Google Scholar [33] A. Qajar, Z. Xue, A.J. Worthen, et al. Modeling fracture propagation and cleanup for dry nanoparticle-stabilized- fracturing fluids.

Materials discovery at high pressures | Nature Reviews …

Experimental tools.High pressure can be applied by using two types of equipment: systems that generate static pressure, including diamond anvil cells and large-volume presses (such as piston ...

High-Pressure Methods | 1. Physikalisches Institut

In 1. Physics Institute, we employ several experimental methods to explore the high-pressure effects on various compounds. Since the external pressure is a clean tuning parameter of material properties as opposed …

Fabrication of high thermal conductive Al–cBN ceramic sinters by high

Al–cBN ceramic sinters were fabricated by sintering micro-powder mixture of Al and cBN under high temperature and high pressure condition. Differential scanning calorimetry (DSC), X-ray diffraction (XRD), scanning electronic microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) elemental mapping analyses and laser …

High-Pressure Processing; Principle, Applications, Impact, and …

HPP employs immensely high pressure of about 400–600 MPa at. temperature range varying from 4°C to < 45°C. Thus, preserving food quality pa -. rameters, that is, nutritional value, texture ...

High pressure: a feasible tool for the synthesis of …

processes provide both extremely high pressure and high temperature for the synthesis of materials, and make some of the synthetic materials have the ability to store high …

Synthesis and mechanism of TiB2–TiN ceramic composites by high-pressure

The high-pressure method helps to lower the reaction temperature and shorten the reaction time. In addition, this method processing in a closed environment can reduce the environmental contamination and obtain dense samples. Therefore, the high-pressure method has obvious advantages over other conventional method, and it is an …

Application of High-Pressure-Based Technologies in the …

High-pressure processing (HPP) is a food pasteurization method where food is subjected to elevated pressures (up to 87,000 pounds per square inch, or 6,000 atmospheres, or 600 MPa), at ambient or chilled temperatures, to alter the food's attributes to achieve consumer-desired qualities. HPP also inactivates harmful and spoilage microorganisms ...

High Pressure Experimental Methods | Semantic Scholar

Measuring the Thickness of a Metal Gasket Squeezed between the Anvils of a High-Pressure Cell while Preparing It for an Experiment. Yu. A. Timofeev A. N. Utyuzh. Engineering, Materials Science. 2003. A simple method for preparing metal gaskets used in high-pressure anvil cells is described.

High Pressure Die Casting

3 High-pressure Die Casting. High-pressure die casting is a process in which molten metal is forced under pressure into a securely locked metal die cavity, where it is held by a powerful press until the metal solidifies. After solidification of the metal, the die is unlocked, opened, and the casting ejected.

High Pressure Experimental Methods

Abstract. This book is a worthy addition to the literature on high-pressure techniques. Unlike earlier books, it emphasizes diamond - anvil cells, which are useful in …

High-pressure processing: Effect on textural properties of …

High-pressure processing (HPP) is a non-thermal, chemical residue-free processing method which involves the application of increased pressure on the products to achieve shelf-stable products by microbial and enzymatic inactivation with minimal impact on the nutritional and chemical composition of foods. The foods used for HPP are meat …

13.2 Using Physical Methods to Control Microorganisms

One method, high-temperature short-time (HTST) pasteurization, exposes milk to a temperature of 72 °C for 15 seconds, which lowers bacterial numbers while preserving the quality of the milk. ... High pressure processing is not commonly used for disinfection or sterilization of fomites. Although the application of pressure and steam in an ...

Research on the high-pressure water jet impacting on the …

The study of the evolution of solid fragmentation during high-pressure water jet impact is essential for the control and optimization of high-pressure water jet technology. Smoothed particle hydrodynamics (SPH) method has unique advantages in dealing with such fluid–solid coupling problems due to its meshless and Lagrangian …

The 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. ... used HPP at a low pressure of 52 MPa, as a standard method to induce the expression of …

Design and fabrication of graded cBN tool materials through high …

The production of graded cubic boron nitride (cBN) tool materials starting with cBN-TiC-Al-Co mixture and having a three-layer symmetrical graded structure were obtained by high temperature high pressure method. In the first part, the design model which proposed a component gradient of cBN varied from 4 vol% to 10 vol% …

HPHT and CVD Diamond Growth Processes: Making Lab …

With the traditional diamond growth method, called high-pressure, high-temperature (HPHT), synthetic diamonds are produced from carbon material in apparatuses that mimic the high pressure, high temperature conditions of natural diamond formation in the earth. The newer method, chemical vapor deposition (CVD), involves filling a …

(IUCr) High-pressure crystallography

Other inventions and discoveries made in high-pressure method­ology soon followed. Now researchers have convenient methods for generating pressure, which can be applied for various probing techniques in their laboratories and dedicated beamlines in synchrotron and neutron facilities (Hazen & Finger, 1982 ; Eremets, 1996 ; Holzapfel & Isaacs ...

Structural and Optical Properties of Silicon Carbide Powders …

The development of new strategies for the mass synthesis of SiC nanocrystals with high structure perfection and narrow particle size distribution remains in demand for high-tech applications. In this work, the size-controllable synthesis of the SiC 3C polytype, free of sp2 carbon, with high structure quality nanocrystals, was realized for …

High blood pressure (hypertension)

High blood pressure (hypertension) is diagnosed if the blood pressure reading is equal to or greater than 130/80 millimeters of mercury (mm Hg). A diagnosis of high blood pressure is usually based on the average of two or more readings taken on separate occasions. ... The method is called renal denervation. Early studies showed …