Preparation of NiO–LiFeO2solid solutions: the role of mechanical and thermal treatments

2007 ◽  
Vol 98 (3) ◽  
pp. 205-208
Author(s):  
Vittorio Berbenni ◽  
Chiara Milanese ◽  
Gianna Bruni ◽  
Pacifico Cofrancesco ◽  
Amedeo Marini ◽  
...  
Keyword(s):  
Thermal Treatments

scholarly journals Phosphoric acid and thermal treatments reveal the peculiar role of surface oxygen anions in lithium and manganese-rich layered oxides

2021 ◽  
Vol 9 (1) ◽  
pp. 264-273
Author(s):  
Jiarong He ◽  
Weibo Hua ◽  
Aleksandr Missiul ◽  
Georgian Melinte ◽  
Chittaranjan Das ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Surface Reconstruction ◽  
Thermal Treatments ◽  
Surface Oxygen ◽  
Layered Oxides ◽  
Oxygen Anions

The peculiar role of surface oxygen anions and surface reconstruction in Co-free layered Li[Li0.2Ni0.2Mn0.6]O2 is discovered by dilute phosphoric acid and thermal treatments.

The Role of Vanadium Oxide on the Titania Transformation under Thermal Treatments and Surface Vanadium States

1996 ◽  
Vol 124 (1) ◽  
pp. 69-76 ◽  
Author(s):  
Miguel A. Bañares ◽  
Luı́s J. Alemany ◽  
M.Carmen Jiménez ◽  
M.Angeles Larrubia ◽  
Fernando Delgado ◽  
...  
Keyword(s):  
Vanadium Oxide ◽  
Thermal Treatments

The Influence of the Diffusion on Adherence of the 60T Deposits Obtained by Thermal Spraying in Electric Arc

2013 ◽  
Vol 371 ◽  
pp. 270-274 ◽  
Author(s):  
Stefan Lucian Toma ◽  
Diana Antonia Gheorghiu ◽  
Steluta Radu ◽  
Costică Bejinariu
Keyword(s):  
Thermal Treatment ◽  
Thermal Processing ◽  
Thermal Spraying ◽  
Xrd Analysis ◽  
Electric Arc ◽  
Processing Method ◽  
Thermal Treatments ◽  
Technological Parameters ◽  
Spraying Process

The physic-chemical and mechanical properties of steel deposits obtained by thermal spraying depend on technological parameters of the spraying process. Generally, wear resistance of the deposits depends on the degree of porosity and the adhesion of the layer to the substrate. In the case of the deposits obtained by spraying, studies have shown that between deposited layer (SD) and substrate (S) there are the following types of adhesions: mechanical, metallurgical, superficial, physical and diffusive. Each type of adherence, enumerated above, works through a well-defined mechanism so that it can be said that the adhesion of the obtained deposits by thermal spray is a sum of mechanisms which interacting. How these mechanisms interact, as well the percentage of the influence is determined by: operating parameters, by the deposit material and thermal treatments after the deposit obtaining. This paper proposes to determine the influence of thermal treatment on adherence of 60T deposits obtained by thermal spraying in electric arc- as a thermal processing method after metallization. The assessment of adherence deposit 60T - in two ways, according to with EN 582 and DIN 27201/2005 in conjunction with the investigations of electron microscopy (SEM), XRD analysis, and image analysis performed at both the zone: Coating - Interface - Substrate (CIS) has revealed the presence of diffusion and the structural constituents. The graphs of adherence variation for 60T deposits with the concentration gradient of the alloying elements of the 60T layer respectively of adherence layer (75B) obtained experimentally by investigations carried out on the substrate have demonstrated the role of the secondary thermal treatment on the deposit adherence.

Purification of bacteriocin from Lactobacillus plantarum KY449289 and its role in preservation of mixed fruit juice

2020 ◽  
Vol 16 ◽  
Author(s):  
Mohanasrinivasan V. ◽  
Mounika Ranga ◽  
Jannatul Firdous Siddique ◽  
Nivetha Anbalagan ◽  
Subathradevi C.
Keyword(s):  
Antibacterial Activity ◽  
Listeria Monocytogenes ◽  
Lactobacillus Plantarum ◽  
Foodborne Pathogens ◽  
Inhibition Zone ◽  
Thermal Treatments ◽  
Optimum Ph ◽  
Effective Role ◽  
Diffusion Assay

Abstract:: Bacteriocins are antimicrobial peptides synthesized ribosomally which can be used as bio-preservative reducing the risk of chemical preservative’s effect and also replacing the thermal treatments. This study aims to isolate, purify the an-tibacterial protein from Lactobacillus plantarum KY449289 and to assess its bio preservative potential. In this study, twenty strains were isolated from a yogurt sample and preliminary characterization was carried out, such as morphological, bio-chemical, and molecular levels as a preliminary assay. The characterized strains were assessed for the antibacterial activity by well diffusion assay, whereas all twenty strains were shown to have a antibacterial activity against foodborne pathogens, among which two strains VITMM04 and VITMM05 shows the highest zone of inhibition of 15 mm and 10 mm respectively against Listeria monocytogenes. The potent isolate VITMM05 solely showed a broad spectrum antibacterial activity against the pathogens. These strains were further subjected to optimization, purification, and application studies. A high increase in the inhibition zone was recorded with an optimum temperature of 35°C and its activity was found to be stable up to 85°C, optimum pH 6, and 5 mM of EDTA as an enhancer surfactant. On subjected to RP-HPLC, the purified sample showed a dis-tinct peak at 2.192 min corresponding to the peak at 2.192 min for standard bacteriocin The six-fold purified bacteriocin was effective in controlling 87% of the microbial population with 20mm zone of inhibiton against the Listeria monocytogenes and this shows the effective role of purified bacteriocin in inhibiting bacterial growth in a greater extent.

scholarly journals Synthesis of Wollastonite Powders by Combustion Method: Role of Amount of Fuel

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Imarally V. de S. R. Nascimento ◽  
Willams T. Barbosa ◽  
Raúl G. Carrodeguas ◽  
Marcus V. L. Fook ◽  
Miguel A. Rodríguez
Keyword(s):  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Combustion Process ◽  
Calcium Nitrate ◽  
Combustion Method ◽  
Thermal Treatments ◽  
X Ray Diffraction ◽  
Solution Combustion

The objective of this work has been the synthesis of wollastonite by solution combustion method. The novelty of this work has been obtaining the crystalline phase without the need of thermal treatments after the synthesis. For this purpose, urea was used as fuel. Calcium nitrate was selected as a source of calcium and colloidal silica served as a source of silicon. The effect of the amount of fuel on the combustion process was investigated. Temperature of the combustion reaction was followed by digital pyrometry. The obtained products were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and specific surface area. The results showed that the combustion synthesis provides nanostructured powders characterized by a high surface area. When excess of urea was used, wollastonite-2M was obtained with a submicronic structure.

ROLE OF THE SEED COAT IN GERMINATION OF CISTUS POPULIFOLIUS L.

1997 ◽  
Vol 45 (4) ◽  
pp. 329-331 ◽  
Author(s):  
Félix Pérez-García ◽  
Adrian Escudero
Keyword(s):  
Sulphuric Acid ◽  
Seed Coat ◽  
Hot Water ◽  
Thermal Treatments ◽  
Distilled Water ◽  
Acid Pretreatment ◽  
Dry Heat

Effect of mechanical scarification, dry heat, hot water, and sulphuric acid on the germination behavior ofCistus populifoliusL. (rockrose) was studied. Untreated seeds after 60 days of incubation germinated less than 7%. After thermal treatments, 90% germination was achieved, and sulphuric acid pretreatment gave 61% germination. Soaking in distilled water did not increase germination, but scarification of the seed coat gave 57%. Hardness and impermeability of the seed coat appear to cause deep dormancy inC. populifoliusseeds.

Revising the Role of pH and Thermal Treatments in Aflatoxin Content Reduction During the Tortilla and Deep Frying Processes

2001 ◽  
Vol 49 (6) ◽  
pp. 2825-2829 ◽  
Author(s):  
Patricia Torres ◽  
Martín Guzmán-Ortiz ◽  
Benjamín Ramírez-Wong
Keyword(s):  
Deep Frying ◽  
Thermal Treatments ◽  
Aflatoxin Content

On the role of thermal treatments on the properties of xanthan solutions

1989 ◽  
Vol 11 (2) ◽  
pp. 127-137 ◽  
Author(s):  
F. Callet ◽  
M. Milas ◽  
M. Rinaudo
Keyword(s):  
Thermal Treatments

Effect of heat treatment on the thermophysical properties of copper-powder-filled polycarbonate and polycarbonate containing paraffin

2019 ◽  
Vol 39 (8) ◽  
pp. 729-735
Author(s):  
Fairouz Zouaoui ◽  
Farid Rouabah ◽  
Yacine Nouar ◽  
Magali Fois
Keyword(s):  
Thermal Conductivity ◽  
Thermophysical Properties ◽  
Thermal Treatments ◽  
Scanning Calorimetry ◽  
Cu Content ◽  
Liquid Transition ◽  
Hot Disk ◽  
Solid Liquid ◽  
Disk Method

Abstract In this study, the effect of paraffin (PR) and copper (Cu) incorporation in polycarbonate (PC) was investigated using differential scanning calorimetry (DSC). The effect of PR incorporation in PC was investigated using thermogravimetric analysis (TGA). The effect of thermal treatments on thermophysical properties was studied in PC/PR and PC/Cu composites by using the hot-disk method and a periodic method (DICO). Specimens were heated at 160°C (Tg + 15°C), then two different cooling methods were employed: furnace cooling (annealing) and water cooling (quenching) at 0°C and 35°C. The DSC results showed that a solid-liquid transition occurred in all PR formulations, as well as showed the plasticizing role of the PR additive. Thermal stability decreased with the addition of PR. Thermal conductivities (λ) increased with increasing Cu content and decreased with PR additive content, and the annealed samples showed a higher thermal conductivity (λ) than quenched ones. Meanwhile, a small difference between the thermal conductivity of the DICO samples and the hot-disk samples was noticed.

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