Reaction Mechanism between Zn2+ and Diatomite in Preparation of Zn2+/Diatomite Antibacterial Agent

2011 ◽  
Vol 685 ◽  
pp. 260-263 ◽  
Author(s):  
Ning Liang ◽  
Hao Ding ◽  
Yong Teng Hu ◽  
Bai Kun Wang
Keyword(s):  
High Temperature ◽  
Reaction Mechanism ◽  
Ion Exchange ◽  
Antibacterial Agent ◽  
Physical Adsorption ◽  
Reaction Model ◽  
Oh Groups ◽  
Heat Treated ◽  
Before And After ◽  
Exchange Adsorption

The reaction mechanism between Zn2+and diatomite in preparation of Zn2+/diatomite antibacterial agent by diatomite adsorbing and solidifying Zn2+in its pores was studied. Microporous adsorption, characterized by hydrated Zn2+adsorbed in the micropores of diatomite, and surface coordinate adsorption, featured with coordination of Zn2+with functional groups on the surfaces of diatomite, were the main adsorption ways accompanied by ion exchange adsorption and physical adsorption. SEM was used to observe the morphologies of diatomite before and after adsorption. Due to the dehydration between OH groups on the surfaces of diatomite when heat treated at high temperature, Si-O-Zn bonds were formed, combining Zn2+with diatomite together. Reaction model between Zn2+and diatomite was established.

Effect of Ion-Exchange Adsorption on the Protein Profiles of White Wines

2001 ◽  
Vol 7 (3) ◽  
pp. 217-224 ◽  
Author(s):  
M. R. Sarmento ◽  
J. C. Oliveiraz ◽  
M. Slatner ◽  
R. B. Boulton
Keyword(s):  
Ion Exchange ◽  
Euclidean Distance ◽  
Protein Profiles ◽  
Protein Peak ◽  
Profile Similarity ◽  
Two Samples ◽  
Before And After ◽  
Exchange Adsorption ◽  
Peak Areas ◽  
Hplc Fractionation

The protein profiles of two different wines of Austrian and Portuguese origin, characterized by HPLC fractionation, were compared before and after ion-exchange adsorption of the wine proteins. Conventionally used sodium bentonite and three alternative nonswelling commercial resins were used. Profile similarity was assessed in terms of the Euclidean distance of all protein peak areas for two samples, and of the average of the differences between each protein peak percentile area between two samples. In general, the differences between profiles for the same material increased with the amount of wine adsorbed, showing that some protein fractions were more easily adsorbed than others. Differences between the adsorption with bentonite or with the alternative adsorbents were not statistically significant, with the exception of one adsorbent in one of the wines, where protein removal was more extensive.

The most prevalent protein in a heat-treated extract of pea (Pisum sativum) embryos is an LEA group I protein; its conformation is not affected by exposure to high temperature

1997 ◽  
Vol 7 (2) ◽  
pp. 117-124 ◽  
Author(s):  
Pauline S. Russouw ◽  
Jill Farrant ◽  
Wolf Brandt ◽  
George G. Lindsey
Keyword(s):  
Heat Treatment ◽  
High Temperature ◽  
Pisum Sativum ◽  
Fluorescence Spectroscopy ◽  
Trypsin Digestion ◽  
Antibody Affinity ◽  
Embryonic Axes ◽  
Group I ◽  
Heat Treated ◽  
Before And After

AbstractThe LEA-like protein previously isolated from a homogenate of pea (Pisum sativum L.) embryonic axes heated at 80°C for 10 min (Russouw et al., 1995) was purified without exposure to heat. Peptides produced by trypsin digestion were separated by HPLC and sequenced. The protein was identified as a member of the LEA group I family. The conformation of the protein was compared before and after heat treatment by antibody affinity, circular dichroism spectroscopy, fluorescence spectroscopy and 8-anilino-1-naphthalenesulfonic acid binding. No differences could be detected, demonstrating that the protein was not irreversibly denatured by exposure to high temperature.

Preparation and Properties of Zn2+/Diatomite Antibacterial Agent

2010 ◽  
Vol 178 ◽  
pp. 226-229
Author(s):  
Ning Liang ◽  
Hao Ding ◽  
Yong Teng Hu ◽  
Bai Kun Wang
Keyword(s):  
Heat Treatment ◽  
High Temperature ◽  
Ion Exchange ◽  
Influencing Factors ◽  
Antibacterial Agent ◽  
Antibacterial Property ◽  
Durability Test ◽  
Minimal Inhibitory Concentrations

. Zn2+/diatomite antibacterial agent was prepared by diatomite loading and solidifying Zn2+ in its holes through ion exchange and heat treatment at high temperature. Influencing factors on its preparation were discussed. Antibacterial property and durability were characterized by measuring the diameters of inhibition rings and the minimal inhibitory concentrations (MIC). Whiteness and antibacterial property of the paint filling it were also tested. The results show that the agent has excellent antibacterial property and durability. The diameters of inhibition rings are larger than 10 mm even after 7 days. MIC is 312 g/mL and it is still low enough after durability test. The paint adding only 0.5% of it also has good antibacterial property while declining the whiteness slightly.

UNS G61200

Alloy Digest ◽  
1991 ◽  
Vol 40 (4) ◽  
Keyword(s):  
Fracture Toughness ◽  
High Temperature ◽  
Heat Treating ◽  
Case Hardening ◽  
Steel Mills ◽  
Temperature Performance ◽  
Treated Condition ◽  
Heat Treated ◽  
High Fatigue ◽  
Heat Treated Condition

Abstract UNS G62100 is a tough, shock resisting, case-hardening chromium-vanadium steel. It has high fatigue resistance in the heat treated condition. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on low and high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: SA-458. Producer or source: Alloy steel mills and foundries.

LUCEFIN GROUP C45U (1.1730)

Alloy Digest ◽  
2020 ◽  
Vol 69 (1) ◽  
Keyword(s):  
High Temperature ◽  
Cold Work ◽  
Hard Case ◽  
Medium Carbon ◽  
Hardened Zone ◽  
Temperature Performance ◽  
Treated Condition ◽  
Heat Treated ◽  
Heat Treated Condition ◽  
Cold Work Tool Steel

Abstract Lucefin Group C45U is a medium-carbon, non-alloy cold-work tool steel. It is primarily used in the non-heat-treated condition. For special applications it is used in the quenched and tempered condition. Owing to its low hardenability, C45U develops a fully hardened zone that is relatively thin, even when quenched drastically. Thicker sections have a hard case over a tough core. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance as well as forming and joining. Filing Code: TS-784. Producer or source: Lucefin S.p.A.

Fresh-cut Mango Fruit Slices

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 457b-457 ◽  
Author(s):  
Arunya Limbanyen ◽  
Jeffrey K. Brecht ◽  
Steven A. Sargent ◽  
Jerry A. Bartz
Keyword(s):  
Chilling Injury ◽  
Flesh Color ◽  
Mango Fruit ◽  
Heat Treated ◽  
Before And After ◽  
Yellow Flesh ◽  
Postharvest Life ◽  
Fresh Cut ◽  
Flesh Browning ◽  
Aseptic Conditions

Preparation and handling procedures for fresh-cut mango slices were developed using `Tommy Atkins', `Haden', and `Palmer' mangoes. Fruit with yellow flesh color (no green color remaining) were optimum maturity for fresh-cut in terms of maintenance of acceptable appearance, texture, and taste; riper fruit developed flesh breakdown and more browning. Postharvest life of fresh-cut mango at 5 °C was 8 to 10 d with no evidence of chilling injury and was limited by flesh browning and loss of firmness. Respiration rates ranged from 32 to 40 mg CO2/kg per hr and ethylene production was typically ≤0.1 μl·kg–1·hr–1. The SSC changed little during storage, while pH varied from 3.5 to 4.8 and TA typically declined by 30% to 40%. Peeling to a depth of at least 2 mm and trimming flesh near the stem scar was necessary to minimize browning. Imported fruit that had been heat-treated for insect quarantine showed more severe browning than Florida fruit that had not been heat-treated. Preparation in aseptic conditions and dipping fruit in a 100 ppm NaOCl solution at pH 7 before and after peeling protected against decay during storage but dipping in chlorine after slicing without removal of excess liquid resulted in flesh translucency and breakdown. Dipping in 1% CaCl2 solution had no effect on flesh firmness (Instron) or browning. Storage in an unvented plastic clamshell container, which developed an atmosphere of 2.25% CO2 plus 19% O2, did not improve shelf life, but a MA of 10% CO2 plus 10% O2 was subjectively judged to slow browning and softening and resulted in no off flavor compared to air storage.

STRESS RELAXATION BEHAVIOUR AND MECHANISM OF HEAT TREATED INCONEL 718 IN HIGH TEMPERATURE ENVIRONMENTS

2013 ◽  
Vol 21 (1) ◽  
pp. 43-51
Author(s):  
O. Bapokutty ◽  
◽  
Z. Sajuri ◽  
J. Syarif ◽  
◽  
...  
Keyword(s):  
High Temperature ◽  
Stress Relaxation ◽  
Inconel 718 ◽  
Relaxation Behaviour ◽  
Heat Treated

A review on extractive fermentation via ion exchange adsorption resins opportunities, challenges, and future prospects

2021 ◽  
Author(s):  
Abdul Sattar Jatoi ◽  
Humair Ahmed Baloch ◽  
Shaukat Ali Mazari ◽  
N. M. Mubarak ◽  
Nizamuddin Sabzoi ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Extractive Fermentation ◽  
Future Prospects ◽  
Exchange Adsorption

scholarly journals Novel Multilayer SAW Temperature Sensor for Ultra-High Temperature Environments

Micromachines ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 643
Author(s):  
Xuhang Zhou ◽  
Qiulin Tan ◽  
Xiaorui Liang ◽  
Baimao Lin ◽  
Tao Guo ◽  
...  
Keyword(s):  
High Temperature ◽  
Temperature Sensor ◽  
X Ray Diffraction ◽  
Aero Engine ◽  
Before And After ◽  
Application Potential ◽  
Passive Sensors ◽  
Temperature Exposure ◽  
Engine Systems

Performing high-temperature measurements on the rotating parts of aero-engine systems requires wireless passive sensors. Surface acoustic wave (SAW) sensors can measure high temperatures wirelessly, making them ideal for extreme situations where wired sensors are not applicable. This study reports a new SAW temperature sensor based on a langasite (LGS) substrate that can perform measurements in environments with temperatures as high as 1300 °C. The Pt electrode and LGS substrate were protected by an AlN passivation layer deposited via a pulsed laser, thereby improving the crystallization quality of the Pt film, with the function and stability of the SAW device guaranteed at 1100 °C. The linear relationship between the resonant frequency and temperature is verified by various high-temperature radio-frequency (RF) tests. Changes in sample microstructure before and after high-temperature exposure are analyzed using scanning electron microscopy (SEM) and X-ray diffraction (XRD). The analysis confirms that the proposed AlN/Pt/Cr thin-film electrode has great application potential in high-temperature SAW sensors.

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