scholarly journals Effect of bacterial growth on the quality of shucked oysters stored at low temperature

2013 ◽  
Vol 79 (6) ◽  
pp. 1020-1022
Author(s):  
TAKAHIRO NAGAI ◽  
MISATO NAKAMORI ◽  
KEN-ICHIRO MIZUNO ◽  
HIDEYUKI TAKATUJI ◽  
MAKOTO WAKANO
Keyword(s):  
Low Temperature ◽  
Bacterial Growth

scholarly journals X-ray diffraction analysis of kaolin M1 and M2 via the Williamson–Hall and Warren–Averbach methods

2021 ◽  
pp. 174751982098472
Author(s):  
Lalmi Khier ◽  
Lakel Abdelghani ◽  
Belahssen Okba ◽  
Djamel Maouche ◽  
Lakel Said
Keyword(s):  
Grain Size ◽  
High Temperature ◽  
Low Temperature ◽  
Diffraction Analysis ◽  
Mechanical Resistance ◽  
X Ray Diffraction ◽  
Integral Breadth ◽  
X Ray ◽  
Mullite Phase

Kaolin M1 and M2 studied by X-ray diffraction focus on the mullite phase, which is the main phase present in both products. The Williamson–Hall and Warren–Averbach methods for determining the crystallite size and microstrains of integral breadth β are calculated by the FullProf program. The integral breadth ( β) is a mixture resulting from the microstrains and size effect, so this should be taken into account during the calculation. The Williamson–Hall chart determines whether the sample is affected by grain size or microstrain. It appears very clearly that the principal phase of the various sintered kaolins, mullite, is free from internal microstrains. It is the case of the mixtures fritted at low temperature (1200 °C) during 1 h and also the case of the mixtures of the type chamotte cooks with 1350 °C during very long times (several weeks). This result is very significant as it gives an element of explanation to a very significant quality of mullite: its mechanical resistance during uses at high temperature remains.

Rootstock effect on serotonin and nutritional quality of tomatoes produced under low temperature and light conditions

2016 ◽  
Vol 46 ◽  
pp. 50-59 ◽  
Author(s):  
Patrick Riga ◽  
Leyre Benedicto ◽  
Libia García-Flores ◽  
Débora Villaño ◽  
Sonia Medina ◽  
...  
Keyword(s):  
Low Temperature ◽  
Nutritional Quality ◽  
Light Conditions

scholarly journals Microbiological quality of non-sterile pharmaceuticals in Egypt

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Nourhan Mahrous Ahmed Salem ◽  
Mohamed Abbas Elbarrawy ◽  
Nashwa Fawzy Abd El Moez Azzam
Keyword(s):  
Bacterial Growth ◽  
Stenotrophomonas Maltophilia ◽  
Microbiological Quality ◽  
Pseudomonas Stutzeri ◽  
Dosage Forms ◽  
Aeromonas Salmonicida ◽  
Acceptable Limit ◽  
Organoleptic Characteristics

Abstract Background The context and purpose of the study are as follows: Drug-borne infections may arise from non-adherence to strict microbiological quality of pharmaceuticals products. Moreover, presence of exceeding levels of microorganisms in non-sterile pharmaceuticals may lead to change of their organoleptic characteristics and loss of effectiveness. The aim of the study is to evaluate the microbiological quality of commonly used non-sterile pharmaceuticals in Alexandria, Egypt. Results Average microbiological quality of the studied products, where 17.03% and 19.23 % of samples had exceeded the maximum acceptable limit of TAMC and TYMC, respectively. No E. coli was isolated from oral products. None of S. aureus nor P. aeruginosa were isolated from topical products. Bacterial growth was recovered from 19 (10.44%) of the studied 182 samples, four Bacillus spp. had been recovered from topical products, two P. aeruginosa isolates were recovered from tablets and other two were isolated from syrups dosage forms. Other isolates were Pseudomonas stutzeri, Stenotrophomonas maltophilia, Acinetobacter Achromobacter denitrificans, Ochrobactrum anthropic and Aeromonas salmonicida. Conclusion Average microbiological quality of the tested pharmaceuticals used in Alexandria.

The Effect of Ge Segregation on Oxidation of Si

1987 ◽  
Vol 105 ◽  
Author(s):  
E. C. Frey ◽  
N. R. Parikh ◽  
M. L. Swanson ◽  
M. Z. Numan ◽  
W. K. Chu
Keyword(s):  
High Pressure ◽  
Low Temperature ◽  
Epitaxial Layer ◽  
Atmospheric Pressure ◽  
Oxidation Rate ◽  
Oxidation Temperature ◽  
Pressure Oxidation ◽  
Enhanced Oxidation ◽  
High Pressure Oxidation

AbstractWe have studied oxidation of various Si samples including: Ge implanted Si, CVD and MBE grown Si(0.4–4% Ge) alloys, and MBE grown Si-Si(Ge) superlattices. The samples were oxidized in pyrogenic steam (800–1000°C, atmospheric pressure) and at low temperature and high pressure (740°C, 205 atm of dry O2). The oxidized samples were analyzed with RBS/channeling and ellipsometry.An enhanced oxidation rate was seen for all Ge doped samples, compared with rates for pure Si. The magnitude of the enhancement increased with decreasing oxidation temperature. For steam oxidations the Ge was segregated from the oxide and formed an epitaxial layer at the Si-SiO2 interface; the quality of the epitaxy was highest for the highest oxidation temperatures. For high pressure oxidation the Ge was trapped in the oxide and the greatest enhancement in oxidation rate (>100%) was observed.

Analysis of Micro Structure and the Resistivity of Cu / Ni Thin Coat as a Low Temperature Sensor Using Electroplating Method Assisted with Magnetic Field outside of the Ion Flow

2021 ◽  
Vol 885 ◽  
pp. 141-147
Author(s):  
Winda Noor Santi ◽  
Moh. Toifur
Keyword(s):  
Magnetic Field ◽  
Low Temperature ◽  
Liquid Nitrogen ◽  
Micro Structure ◽  
Medical Field ◽  
Cold Temperatures ◽  
Ion Flow ◽  
Resistance Temperature Detector ◽  
Temperature Detector

Preservation of materials using liquid nitrogen media has been widely used. One of them is used in the medical field, namely cryonic technology. Cryonics is a method of preservation at cold temperatures using a cryoprotectant in liquid nitrogen. To maintain the quality of the material, a sensor that can detect the temperature of liquid nitrogen is needed. Low temperature sensors with Cu and Ni based Resistance Temperature Detector with layers (RTD) have been made, but these sensors have a layer of Ni deposits that are not yet homogeneous. So quality improvement is needed by adding an external magnetic field. Based on this, the aim of this research is to synthesize a thin layer of Cu / Ni using electroplating method assisted by external magnets parallel to the ion currents

Effects of High Pressure Processing on the Quality of Vacuum Packed Fish Patties

2014 ◽  
Vol 644-650 ◽  
pp. 4671-4676
Author(s):  
Ying Chun Zhu ◽  
Li Zhen Ma ◽  
Yu Jing Tian ◽  
Hua Yang ◽  
Yao Hua Guo ◽  
...  
Keyword(s):  
High Pressure ◽  
Bacterial Growth ◽  
Reduction Potential ◽  
Meat Products ◽  
High Pressure Processing ◽  
Control Group ◽  
Oxidation Reduction ◽  
Preservation Method ◽  
Oxidation Reduction Potential

The objective of this study was to evaluate the use of high pressure processing (HPP) as a preservation method of meat products. Vacuum-packaged fish patties were subjected to HPP (300 MPa for 30 min 15°C or 500 Mpa for 10 min at 15°C). Untreated samples represented the control group. The three groups were stored at 4°C for 0–5 weeks. Color parameters, pH, thiobarbituric (TBARS), bacterial growth, and Oxidation-Reduction Potential (ORP) were determined. The results revealed that the 500-MPa treatment inhibited bacterial growth and extended the shelf-life of fish patties to four weeks with insignificant effects on the physicochemical attributes.

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