scholarly journals Cellular Injuries in Cronobacter sakazakii CIP 103183T and Salmonella enterica Exposed to Drying and Subsequent Heat Treatment in Milk Powder

2018 ◽  
Vol 9 ◽  
Author(s):  
Emilie Lang ◽  
Stéphane Guyot ◽  
Caroline Peltier ◽  
Pablo Alvarez-Martin ◽  
Jean-Marie Perrier-Cornet ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Salmonella Enterica ◽  
Milk Powder ◽  
Subsequent Heat Treatment ◽  
Cronobacter Sakazakii

scholarly journals Caco-2 Invasion by Cronobacter sakazakii and Salmonella enterica Exposed to Drying and Heat Treatments in Dried State in Milk Powder

2017 ◽  
Vol 8 ◽  
Author(s):  
Emilie Lang ◽  
Stéphane Guyot ◽  
Pablo Alvarez-Martin ◽  
Jean-Marie Perrier-Cornet ◽  
Patrick Gervais
Keyword(s):  
Salmonella Enterica ◽  
Milk Powder ◽  
Heat Treatments ◽  
Cronobacter Sakazakii

scholarly journals Natural Antimicrobials Suitable for Combating Desiccation-Resistant Salmonella enterica in Milk Powder

2021 ◽  
Vol 9 (2) ◽  
pp. 421 ◽  
Author(s):  
Ahmed G. Abdelhamid ◽  
Ahmed E. Yousef
Keyword(s):  
Heat Treatment ◽  
Salmonella Typhimurium ◽  
Salmonella Enterica ◽  
Food Additives ◽  
Milk Powder ◽  
Combined Use ◽  
Freeze Dried ◽  
Liquid Milk ◽  
Food Model ◽  
Potassium Leakage

Some Salmonella enterica strains survive well in low-water activity (low-aw) foods and cause frequent salmonellosis outbreaks in these products. Methods are needed to overcome such desiccation-resistant Salmonella and to improve the safety of low-aw foods. Building on a recent finding, we hypothesized that natural antimicrobial food additives, which are active against cytoplasmic membrane, could overcome this desiccation resistance phenomenon, and thus, sensitize the pathogen to drying and mild processing. Food additives were screened for the ability to cause leakage of intracellular potassium ions; retention of these ions is vital for protecting Salmonella against desiccation. Two antimicrobial food additives, carvacrol and thymol, caused considerable potassium leakage from the desiccation-resistant S. enterica serovars, Tennessee and Livingstone. Thus, carvacrol and thymol were investigated for their ability to sensitize the desiccation-adapted S. enterica to heat treatment. The combined use of food additives, at their minimum inhibitory concentrations, with heat treatment at 55 °C for 15 min caused 3.1 ± 0.21 to more than 5.5 log colony forming unit (CFU)/mL reduction in desiccation-adapted S. enterica, compared to 2.4 ± 0.53–3.2 ± 0.11 log CFU/mL reduction by sole heat treatment. Carvacrol was the additive that caused the greatest potassium leakage and sensitization of Salmonella to heat; hence, the application of this compound was investigated in a food model against Salmonella Typhimurium ASD200. Addition of carvacrol at 200 or 500 ppm into liquid milk followed by spray-drying reduced the strain’s population by 0.9 ± 0.02 and 1.3 ± 0.1 log CFU/g, respectively, compared to 0.6 ± 0.02 log CFU/g reduction for non-treated spray-dried milk. Additionally, freeze-drying of milk treated with high levels of carvacrol (5000 ppm) reduced the population of Salmonella Typhimurium ASD200 by more than 4.5 log CFU/g, compared to 1.1 ± 0.4 log CFU/g reduction for the freeze-dried untreated milk. These findings suggest that carvacrol can combat desiccation-resistant S. enterica, and thus, potentially improve the safety of low-aw foods.

Combination of hot isostatic pressing and subsequent heat treatment for additively manufactured Zr-1Mo components

2021 ◽  
Vol 285 ◽  
pp. 129123
Author(s):  
Xiaohao Sun ◽  
Debao Liu ◽  
Minfang Chen ◽  
Weiwei Zhou ◽  
Naoyuki Nomura ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Hot Isostatic Pressing ◽  
Subsequent Heat Treatment ◽  
Isostatic Pressing

Engineering mechanical properties by controlling the microstructure of an Fe–Ni–Mn martensitic steel through pre-cold rolling and subsequent heat treatment

2021 ◽  
Vol 804 ◽  
pp. 140760
Author(s):  
Hamidreza Koohdar ◽  
Pouya Hakimipour ◽  
Hamid Reza Jafarian ◽  
Terence G. Langdon ◽  
Mahmoud Nili-Ahmadabadi
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Cold Rolling ◽  
Martensitic Steel ◽  
Subsequent Heat Treatment

Preparation of Hydroxyapatite/Chitosan Biological Coatings on Carbon/Carbon Composites

2010 ◽  
Vol 434-435 ◽  
pp. 502-505
Author(s):  
Ying Hua Li ◽  
Li Yun Cao ◽  
Jian Feng Huang ◽  
Xie Rong Zeng
Keyword(s):  
Heat Treatment ◽  
Electrophoretic Deposition ◽  
Isopropyl Alcohol ◽  
Raw Materials ◽  
Composite Coatings ◽  
Thermal Conditions ◽  
Hydrothermal Condition ◽  
Subsequent Heat Treatment ◽  
Carbon Composites ◽  
Deposition Voltage

Hydroxyapatite/Chitosan (HAp/CS) bio-coatings were prepared on the surface of carbon/ carbon (C/C) composites by hydrothermal electrophoretic deposition, using sonochemical process resulted HAp nanoparticles, isopropyl alcohol and chitosan as raw materials. The influences of hydro- thermal conditions and deposition voltage on the microstructures and morphologies of the as-prepared coatings were investigated. It was shown that homogenous and dense HAp/CS coatings on C/C composites are obtained by hydrothermal electrophoretic deposition. With the increase of deposition voltage, density and homogeneity of the as-prepared HAp/CS composite coatings are well improved. Due to the growth of HAp nanoparticles in the hydrothermal condition, the subsequent heat treatment of the HAp/CS coatings is not needed.

Growth of polycrystalline hydroxyapatite thin films by pulsed laser deposition and subsequent heat treatment in air

1998 ◽  
Author(s):  
V. D. Nelea ◽  
Cornel Ghica ◽  
C. Martin ◽  
Alexandru Hening ◽  
Ion N. Mihailescu ◽  
...  
Keyword(s):  
Thin Films ◽  
Heat Treatment ◽  
Pulsed Laser Deposition ◽  
Pulsed Laser ◽  
Subsequent Heat Treatment ◽  
Laser Deposition
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