scholarly journals Short-time, high temperature mechanical testing of electrically conductive materials

1975 ◽  
Author(s):  
R. Marion ◽  
C. Karnes
Keyword(s):  
High Temperature ◽  
Mechanical Testing ◽  
Electrically Conductive ◽  
Conductive Materials ◽  
Short Time

A Short-Time, High Temperature Mechanical Testing Facility

1978 ◽  
Vol 6 (1) ◽  
pp. 3 ◽  
Author(s):  
RT Horstman ◽  
KC Lieb ◽  
RL Meltzer ◽  
IC Moore ◽  
RH Marion
Keyword(s):  
High Temperature ◽  
Mechanical Testing ◽  
Testing Facility ◽  
Short Time

Effects of Long-Term Service on the Microstructure and Tensile Properties of Alloy 800H

2007 ◽  
Author(s):  
Robert W. Swindeman ◽  
Sam Y. Zamrik ◽  
Phillip J. Maziasz
Keyword(s):  
High Temperature ◽  
Tensile Properties ◽  
Mechanical Testing ◽  
Ultimate Strength ◽  
Alloy 800H ◽  
Time Exposure ◽  
Short Time ◽  
Strength And Ductility

Three sections of piping removed from a styrene furnace were metallugically examined. The piping was fabricated from alloy 800H and was service-exposed at temperatures in the range of 621 to 774°C (1150 to 1425°F) for times in the range of 73,500 to 90,000 hours. These samples were investigated by metallurgical studies and mechanical testing to determine the effect of the prolonged high-temperature service on the integrity of the components. A few specimens from the samples were re-annealed to determine if the properties could be restored to their original values. A few more specimens were re-annealed and aged for 1000 hours to determine if significant changes would occur during short-time exposure to high temperature. With one exception, the service-exposed samples exhibited microstructures and properties that were comparable to mill annealed and short-time exposed material. Modest increases in strength and reduction in ductility accompanied the exposure. The exception was material exposed to the highest temperature for the longest time. Here, a significant decrease in the ultimate strength and ductility was observed in a test at 704°C (1300°F).

Ti-679

Alloy Digest ◽  
1966 ◽  
Vol 15 (11) ◽  
Keyword(s):  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Creep Strength ◽  
Heat Treating ◽  
High Temperature Alloy ◽  
Temperature Performance ◽  
Time Strength ◽  
Short Time

Abstract Ti-679 is a titanium high temperature alloy having an excellent combination of short-time strength, creep strength and stability to 900 F. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: Ti-48. Producer or source: Titanium Metals Corporation of America.

scholarly journals Differential impact of Holder and High Temperature Short Time pasteurization on the dynamic in vitro digestion of human milk in a preterm newborn model

2020 ◽  
Vol 328 ◽  
pp. 127126 ◽  
Author(s):  
Stefano Nebbia ◽  
Marzia Giribaldi ◽  
Laura Cavallarin ◽  
Enrico Bertino ◽  
Alessandra Coscia ◽  
...  
Keyword(s):  
High Temperature ◽  
Human Milk ◽  
In Vitro Digestion ◽  
Preterm Newborn ◽  
Differential Impact ◽  
High Temperature Short Time ◽  
Short Time

scholarly journals Protein and Polysaccharide-Based Electroactive and Conductive Materials for Biomedical Applications

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4499
Author(s):  
Xiao Hu ◽  
Samuel Ricci ◽  
Sebastian Naranjo ◽  
Zachary Hill ◽  
Peter Gawason
Keyword(s):  
Cell Biology ◽  
Biomedical Applications ◽  
Human Life ◽  
Electrically Conductive ◽  
Conductive Materials ◽  
Production Strategies ◽  
Integral Role ◽  
Material Sciences ◽  
Novel Drug

Electrically responsive biomaterials are an important and emerging technology in the fields of biomedical and material sciences. A great deal of research explores the integral role of electrical conduction in normal and diseased cell biology, and material scientists are focusing an even greater amount of attention on natural and hybrid materials as sources of biomaterials which can mimic the properties of cells. This review establishes a summary of those efforts for the latter group, detailing the current materials, theories, methods, and applications of electrically conductive biomaterials fabricated from protein polymers and polysaccharides. These materials can be used to improve human life through novel drug delivery, tissue regeneration, and biosensing technologies. The immediate goal of this review is to establish fabrication methods for protein and polysaccharide-based materials that are biocompatible and feature modular electrical properties. Ideally, these materials will be inexpensive to make with salable production strategies, in addition to being both renewable and biocompatible.

scholarly journals High-Temperature Short-Time and Holder Pasteurization of Donor Milk: Impact on Milk Composition

Life ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 114
Author(s):  
Diana Escuder-Vieco ◽  
Juan M. Rodríguez ◽  
Irene Espinosa-Martos ◽  
Nieves Corzo ◽  
Antonia Montilla ◽  
...  
Keyword(s):  
High Temperature ◽  
Human Milk ◽  
Milk Composition ◽  
Donor Human Milk ◽  
High Temperature Short Time ◽  
Lactose Concentration ◽  
C 30 ◽  
Milk Banks ◽  
Short Time

Holder pasteurization (HoP; 62.5 °C, 30 min) is commonly used to ensure the microbiological safety of donor human milk (DHM) but diminishes its nutritional properties. A high-temperature short-time (HTST) system was designed as an alternative for human milk banks. The objective of this study was to evaluate the effect of this HTST system on different nutrients and the bile salt stimulated lipase (BSSL) activity of DHM. DHM was processed in the HTST system and by standard HoP. Macronutrients were measured with a mid-infrared analyzer. Lactose, glucose, myo-inositol, vitamins and lipids were assayed using chromatographic techniques. BSSL activity was determined using a kit. The duration of HTST treatment had a greater influence on the nutrient composition of DHM than did the tested temperature. The lactose concentration and the percentage of phospholipids and PUFAs were higher in HTST-treated than in raw DHM, while the fat concentration and the percentage of monoacylglycerides and SFAs were lower. Other nutrients did not change after HTST processing. The retained BSSL activity was higher after short HTST treatment than that following HoP. Overall, HTST treatment resulted in better preservation of the nutritional quality of DHM than HoP because relevant thermosensitive components (phospholipids, PUFAs, and BSSL) were less affected.

Influence of Guar Gum on the Thermal Stability of Listeria innocua, Listeria monocytogenes, and γ-Glutamyl Transpeptidase during High-Temperature Short-Time Pasteurization of Bovine Milk

1999 ◽  
Vol 62 (8) ◽  
pp. 861-866 ◽  
Author(s):  
PUNIDADAS PIYASENA ◽  
ROBIN C. McKELLAR
Keyword(s):  
High Temperature ◽  
Laminar Flow ◽  
Protective Effect ◽  
Guar Gum ◽  
Listeria Innocua ◽  
Water Mixture ◽  
High Temperature Short Time ◽  
Whole Milk ◽  
Short Time ◽  
Glutamyl Transpeptidase

Mathematical models describing the thermal inactivation of γ-glutamyl transpeptidase (TP) and Listeria innocua in milk during high-temperature short-time (HTST) pasteurization were validated with data from TP, L. innocua, and L. monocytogenes trials in guar gum–milk. Holding tube times were determined for turbulent flow using water, and for laminar flow using a guar gum (0.27% wt/wt)–sucrose (5.3% wt/wt)–water mixture. Inactivation of TP and L. innocua was lower in a solution of guar gum (0.25% wt/wt) in whole milk than was predicted by models derived from studies with whole milk alone. Use of laminar flow timings improved model fit but did not completely account for the observed protective effect. L. monocytogenes survival was close to that predicted by the L. innocua model, although some protection was afforded this pathogen under laminar flow. Considerable intertrial variability was noted for L. monocytogenes. Risk analysis simulations using @RISK, a Lotus 1-2–3W add-in, were used to account for intertrial variability. Simulated log10 %reductions consistently underpredicted experimental L. monocytogenes survival (fail-safe), thus the L. innocua model derived in milk is suitable for estimating L. monocytogenes survival in viscous products. Increased thermal tolerance during laminar flow may be attributed to the protective effect of stabilizer.

High-temperature diffraction experiments and phase diagram of ZrO2 and ZrSiO4

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Akira Yoshiasa ◽  
Tsubasa Tobase ◽  
Hiroshi Arima-Osonoi ◽  
Ken-Ichi Funakoshi ◽  
Osamu Ohtaka ◽  
...  
Keyword(s):  
High Temperature ◽  
Unit Cell ◽  
Cubic Phase ◽  
Imaging Plate ◽  
X Ray Diffraction ◽  
Space Group ◽  
Cell Parameters ◽  
Time Observation ◽  
Short Time ◽  
Clear Change

Abstract High-temperature X-ray diffraction (XRD) experiments up to T = 2710 °C have been performed on ZrSiO4 and ZrO2 powders, using the container-less levitation technique. A two-dimensional imaging plate (IP) detector was used for short-time observation. The diffraction data in a wide area was projected in one dimension. The unit cell parameters, thermal expansions, and c/a ratios for ZrSiO4 (space group I41/amd and Z = 4), tetragonal ZrO2 (space group P42/nmc and Z = 2) and cubic ZrO2 (space group  F m 3   ‾ m $Fm3‾{}m$ and Z = 4) were measured to understand the high-temperature behaviors. The transition temperature between tetragonal and cubic ZrO2 was specified to be between 2430 and 2540 °C. The pre-transitional behavior was observed around 2200 °C. As no clear change in unit cell volume is evident, the phase boundary between the tetragonal and the cubic phase has been shown to be a positive slope. The ZrO2 and ZrO2–SiO2 phase diagrams are proposed based on the chemical composition and the crystal structure.

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