scholarly journals Improved Thermal Properties and Flow Behavior of Palm Olein-Based Diacylglycerol: Impact of Sucrose Stearate Incorporation

Processes ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 604
Author(s):  
Siou Pei Ng ◽  
Yih Phing Khor ◽  
Hong Kwong Lim ◽  
Oi Ming Lai ◽  
Yong Wang ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Room Temperature ◽  
Palm Olein ◽  
Flow Behavior ◽  
Enzymatic Reaction ◽  
Fats And Oils ◽  
Advanced Technology ◽  
Simple Method ◽  
Oil Refineries ◽  
Nonionic Emulsifier

Palm olein-based diacylglycerol (POL-DAG) oil is a healthy product that is produced through enzymatic reaction and purification processes. However, POL-DAG oil easily solidifies at room temperature and crystallizes at high temperatures. The effect of different concentrations of sucrose stearate (1 and 10 g kg−1) added as a nonionic emulsifier, to POL-DAG oil containing 800 g kg−1 diacylglycerol, on its physical properties and flow behavior were investigated. The thermal properties of POL-DAG oil in melting, crystallization transition, and onset temperature were significantly decreased (p < 0.05) with the addition of emulsifiers. Besides, the incorporation of emulsifiers also significantly reduced (p < 0.05) the hardness of POL-DAG oil. Moreover, all POL-DAG oils with emulsifiers incorporated exhibited shear-thinning behavior, a low consistency coefficient (K) and a low apparent viscosity. The present study resolves the solidification issue and eases the pourability of POL-DAG oil by the incorporation of sucrose stearate. The process of adding an emulsifier to POL-DAG oil is a simple method that does not require advanced technology or process modifications to manage the POL-DAG oil and thus is highly applicable for the fats and oils industries and palm oil refineries.

scholarly journals Synthesis and characterization of a new ZIF-67@MgAl2O4 nanocomposite and its adsorption behaviour

RSC Advances ◽  
2021 ◽  
Vol 11 (22) ◽  
pp. 13245-13255
Author(s):  
Mehdi Davoodi ◽  
Fatemeh Davar ◽  
Mohammad R. Rezayat ◽  
Mohammad T. Jafari ◽  
Mehdi Bazarganipour ◽  
...  
Keyword(s):  
Room Temperature ◽  
Magnesium Aluminate ◽  
Synthesis And Characterization ◽  
Magnesium Aluminate Spinel ◽  
Adsorption Behaviour ◽  
Zeolitic Imidazolate Framework ◽  
Simple Method

New nanocomposite of zeolitic imidazolate framework-67@magnesium aluminate spinel (ZIF-67@MgAl2O4) has been fabricated by a simple method at room temperature with different weight ratios.

scholarly journals EPR Spectra of Sintered Cd1−xCrxTe Powdered Crystals with Various Cr Content

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3449
Author(s):  
Ireneusz Stefaniuk ◽  
Werner Obermayr ◽  
Volodymyr D. Popovych ◽  
Bogumił Cieniek ◽  
Iwona Rogalska
Keyword(s):  
Curie Temperature ◽  
Room Temperature ◽  
Integral Intensity ◽  
Resonance Field ◽  
Epr Spectra ◽  
Paramagnetic Resonance ◽  
Simple Method ◽  
Paramagnetic Curie Temperature ◽  
Cr Content ◽  
Electron Paramagnetic

In this paper, we show a simple method of producing ferromagnetic materials with a Curie temperature above room temperature. The electron paramagnetic resonance (EPR) spectra of Cd1−xCrxTe (0.002 < x < 0.08) were measured with a dependence on temperature (82 K < T < 381 K). Obtained EPR lines were fitted to a Lorentz-shaped curve. The temperature dependencies of the parameters of the EPR lines, such as the peak-to-peak linewidth (Hpp), the intensity (A), as well as the resonance field (Hr), were studied. Ferromagnetism was noticed in samples at high temperatures (near room temperature). For a sample with a nominal concentration of chrome of x = 0.05, a very strong intrinsic magnetic field is observed. The value of the effective gyromagnetic factor for this sample is ge = 30 at T = 240 K. An increase of chrome concentration above x = 0.05 reduces the ferromagnetic properties considerably. Analysis of the temperature dependencies of the integral intensity of EPR spectra was carried out using the Curie–Weiss law and the paramagnetic Curie temperature was obtained.

Thermal properties of fats and oils. VIII. Specific heats, heats of fusion, and entropy of alpha and beta tung oils

1952 ◽  
Vol 29 (4) ◽  
pp. 155-157 ◽  
Author(s):  
T. L. Ward ◽  
W. S. Singleton ◽  
R. W. Planck
Keyword(s):  
Thermal Properties ◽  
Fats And Oils ◽  
Specific Heats

Electrophysical Properties of Iodine Doped Acetylene/Ethylene Copolymers

1993 ◽  
Vol 328 ◽  
Author(s):  
A. N. Aleshin ◽  
E. G. Guk ◽  
V. A. Marikhin ◽  
L. P. Myasnikova ◽  
D. G. Belov
Keyword(s):  
Thermal Properties ◽  
Charge Carrier ◽  
Carrier Transport ◽  
Room Temperature ◽  
Dc Conductivity ◽  
Charge Carrier Transport ◽  
Electrophysical Properties ◽  
Ethylene Copolymers ◽  
Hopping Mechanism ◽  
A Charge

ABSTRACTA new oxydative-resistant, fusible and processible ethylene/acetylene copolymer has been synthesized. The content of rigid (acetylene) and flexible (ethylene) fragments has been widely varied. The structure of the nascent powders and the films compressed at room temperature have been investigated by SEM and WAXS. DSC has been used for studying the thermal properties. DC conductivity of the iodine doped samples has been measured as a function of temperature. It is shown that the doping leads to arising conductivity in the samples even at 10 Mol % acetylene fragments in copolymer. The conductivity up to 10−3 S/cm is reached for the samples with acetylene fragment concentration about 20 Mol %. It is found that a charge carrier transport in investigated copolymers is caused by doped polyacetylene fragments and described by the hopping Mechanism.

Study of thermal properties of Ga0.5In1.5Se3 by differential scanning calorimetry

2021 ◽  
pp. 2150407
Author(s):  
S. I. Ibrahimova
Keyword(s):  
Crystal Structure ◽  
Differential Scanning Calorimetry ◽  
Thermal Properties ◽  
Thermal Effects ◽  
Room Temperature ◽  
Structural Studies ◽  
X Ray Diffraction ◽  
Hexagonal Symmetry ◽  
Scanning Calorimetry ◽  
X Ray

The crystal structure and thermal properties of the [Formula: see text] compound have been investigated. Structural studies were performed by X-ray diffraction at room temperature. The crystal structure of this compound was found to correspond to the hexagonal symmetry of the space group P61. Thermal properties were studied using a differential scanning calorimetry (DSC). It was found in the temperature range [Formula: see text] that thermal effects occur at temperatures [Formula: see text] and [Formula: see text]. The thermodynamic parameters of these effects are calculated.

Preparation of Ag@zeolitic imidazolate framework-67 at room temperature for electrochemical sensing of hydrogen peroxide

The Analyst ◽  
2019 ◽  
Vol 144 (2) ◽  
pp. 521-529 ◽  
Author(s):  
Yuhua Dong ◽  
Chengqian Duan ◽  
Qinglin Sheng ◽  
Jianbin Zheng
Keyword(s):  
Hydrogen Peroxide ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Room Temperature ◽  
Electrochemical Sensing ◽  
Carbon Electrode ◽  
Zeolitic Imidazolate Framework ◽  
Simple Method ◽  
Hydrogen Peroxide Sensor

In this work, a novel non-enzymatic hydrogen peroxide sensor, Ag@zeolitic imidazolate framework-67 (Ag@ZIF-67)/glassy carbon electrode (GCE), was fabricated by a simple method at room temperature.

scholarly journals Impact of the iron substitution on the thermoelectric properties of Co 1− x Fe x S 2 ( x  ≤ 0.30)

2019 ◽  
Vol 377 (2152) ◽  
pp. 20180337 ◽  
Author(s):  
Ulises Acevedo Salas ◽  
Ismail Fourati ◽  
Jean Juraszek ◽  
Fabienne Richomme ◽  
Denis Pelloquin ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermal Properties ◽  
Thermoelectric Properties ◽  
Thermoelectric Material ◽  
Power Factor ◽  
Room Temperature ◽  
Low Carbon ◽  
Energy Materials ◽  
Work Samples ◽  
Lattice Part

The strong interplay between magnetism and transport can tune the thermoelectric properties in chalcogenides and oxides. In the case of ferromagnetic CoS 2 pyrite, it was previously shown that the power factor is large at room temperature, reaching 1 mW m −1  K −2 and abruptly increases for temperatures below the Curie transition ( T C ), an increase potentially due to a magnonic effect on the Seebeck ( S ) coefficient. The too large thermal conductivity approximately equal to 10.5 W m −1  K −1 at room temperature prevents this pyrite from being a good thermoelectric material. In this work, samples belonging to the Co 1− x Fe x S 2 pyrite family ( x  = 0, 0.15 and 0.30) have thus been investigated in order to modify the thermal properties by the introduction of disorder on the Co site. We show here that the thermal conductivity can indeed be reduced by such a substitution, but that this substitution predominantly induces a reduction of the electronic part of the thermal conductivity and not of the lattice part. Interestingly, the magnonic contribution to S below T C disappears as x increases, while at high T , S tends to a very similar value (close to −42 µV K −1 ) for all the samples investigated. This article is part of a discussion meeting issue ‘Energy materials for a low carbon future’.

scholarly journals Determination of Total Interleukin-8 in Whole Blood after Cell Lysis

2000 ◽  
Vol 46 (9) ◽  
pp. 1387-1394 ◽  
Author(s):  
Jochen Reinsberg ◽  
Jörg Dembinski ◽  
Christoph Dorn ◽  
Daniela Behrendt ◽  
Peter Bartmann ◽  
...  
Keyword(s):  
Whole Blood ◽  
Healthy Subjects ◽  
Room Temperature ◽  
Sample Pretreatment ◽  
Cell Lysis ◽  
Interleukin 8 ◽  
Simple Method ◽  
Sample Handling ◽  
A Cell

Abstract Background: It has been shown that a high percentage of interleukin-8 (IL-8) in blood is cell associated. Recently, a simple method for determination of cell-associated IL-8 in whole blood after cell lysis has been described. The purpose of this study was to evaluate this method, to examine the influence of preanalytic sample handling, and to establish the concentration range of total IL-8 and its relation to age and sex in healthy subjects. Methods: Total IL-8 content of whole blood was determined after lysing blood cells with Milenia® cell lysis solution. IL-8 in the resulting blood lysate was measured with the IMMULITE® IL-8 immunoassay. Results: When freshly drawn blood was stored up to 48 h on ice, no significant changes in total IL-8 were measured in the subsequently prepared lysate, whereas with storage at room temperature, total IL-8 increased after 3 h from 94 ± 13 ng/L to 114 ± 16 ng/L (n = 10). In lysate stored for 48 h at 4 °C, marginal changes of the IL-8 concentration were noted, with storage at room temperature, only 76% ± 5% (n = 12) of initial concentration was recovered. From lysate frozen at −20 and −80 °C, respectively, 84% ± 4% and 93% ± 2% of initial IL-8 was recovered after 70 days (n = 10). IL-8 was measured with comparable precision in plasma (CV, 3.2–4.2%) and blood lysate (CV, 3.7–4.1%). When plasma was diluted with cell lysis solution, a slightly overestimated recovery (125% ± 3%) was observed; for lysate specimens with a cell lysis solution content ≥75%, the recovery after dilution was 98% ± 2%. In lysate prepared from 12 blood samples with exogenous IL-8 added, IL-8 recovery was 104% ± 2% (recovery from plasma &lt;35%). The median total IL-8 in blood lysates from 103 healthy subjects (22–61 years) was 83 ng/L of blood (2.5–97.5 percentile range, 49–202 ng/L of blood). In females but not in males, total IL-8 increased significantly with advancing age (P &lt;0.002). We found grossly increased total IL-8 in six pregnant women with amniotic infection syndrome. Conclusions: The evaluated method allows the assessment of total IL-8 in blood with good performance when appropriate conditions of sample pretreatment are considered. The values in healthy volunteers all were above the detection limit of the IL-8 assay; therefore, slight changes of total IL-8 could be noted. Thus, the present method is a suitable tool to study the diagnostic relevance of total IL-8 in blood.

Self-assembly of a Novel Three-dimensional Silver(I) Supramolecular Framework from Cationic Chains and Anionic Sheets

2010 ◽  
Vol 65 (2) ◽  
pp. 152-156
Author(s):  
Di Sun ◽  
Cheng-Feng Yang ◽  
Zhan-Hua Wei ◽  
Geng-Geng Luo ◽  
Na Zhang ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Hydrogen Bonds ◽  
Self Assembly ◽  
Room Temperature ◽  
Three Dimensional ◽  
Supramolecular Framework ◽  
Π Interactions ◽  
Π Stacking ◽  
Benzenedicarboxylic Acid

A new three-dimensional (3D) supramolecular framework, [Ag2(bipy)2(bdc)·4H2O]n 1, has been synthesized by the ultrasonic reaction of Ag2O, bipy and H2bdc (H2bdc = 1,4-benzenedicarboxylic acid; bipy = 4,4’-bipyridine) at room temperature. It exhibits a new 3D supramolecular framework which is built from cationic Ag-bipy chains and anionic bdc-H2O sheets through hydrogen bonds, π · · ·π stacking and C-H· · ·π interactions. Additionally, the photoluminescent and thermal properties of 1 were investigated.

Thermal properties of fats and oils

1944 ◽  
Vol 21 (10) ◽  
pp. 300-302 ◽  
Author(s):  
A. E. Bailey ◽  
G. D. Oliver
Keyword(s):  
Thermal Properties ◽  
Fats And Oils
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