Synergistic effect of binary systems of nanostructured MoS 2 / SiO 2 and GO / SiO 2 as additives to coconut oil‐derived grease: Enhancement of physicochemical and lubrication properties

2021 ◽  
Author(s):  
Sooraj Singh Rawat ◽  
A. P. Harsha ◽  
Om P. Khatri
Keyword(s):  
Synergistic Effect ◽  
Binary Systems ◽  
Coconut Oil ◽  
Lubrication Properties

scholarly journals Activity of Some Disinfectants, Detergents and Essential Oils on Growth of the yeast Candida albicans

2017 ◽  
Vol 28 (1) ◽  
pp. 25
Author(s):  
Siham S. Al-Salihi ◽  
Israa A. M. Jumaah
Keyword(s):  
Candida Albicans ◽  
Sodium Chloride ◽  
Synergistic Effect ◽  
Coconut Oil ◽  
Antagonistic Effect ◽  
Moderate Activity ◽  
Clove Oil ◽  
Apple Cider ◽  
Thyme Oil ◽  
Lugol’S Iodine

The study was conducted for estimating antifungal activity against Candida albicans of ten essential oil, garlic and onion juice, eight disinfectants and detergents by using agar diffusion well method. The results showed high activity of clove oil, onion juice 50%, thyme oil, hydrogen peroxide (H2O2), lugol's iodine and detol for all the five concentration, sodium chloride (NaCl) and sodium carbonate (Na2CO3) at 5%, while the effect of apple cider vinegar were at 60% and 80%. Sodium hypochlorite showed moderate activity at all concentration. The result of combination between clove oil and coconut oil led to synergistic effect while the combination between each of (1, 2, 3 % H2O2 with each of apple cider vinegar and NaCl), (sodium chloride with apple cider vinegar) and (pumpkin oil with clove oil) lead to antagonism as well as the same results were reported when apple cider vinegar mixed with each of (thyme oil) and (clove oil with coconut oil). On the other hand, there is no synergistic or antagonistic effect of combination between 4-5% of H2O2 with apple cider vinegar and NaCl solution to the growth of C. albicans. It was concluded that solitary use of compounds (clove oil, onion juice, thyme oil, H2O2, NaCl, lugol's iodine, detol, and apple cider vinegar) was associated with high antifungal response regarding C. albicans; efficacy was reduced when used in combination. In exception to above finding synergistic effect was identified when a combination between clove oil and coconut oil.

scholarly journals Comparative Study on Mixing Behavior of Binary Mixtures of Cocoa Butter/Tristearin (CB/TS) and Cocoa Butter/Coconut Oil (CB/CO)

Foods ◽  
2020 ◽  
Vol 9 (3) ◽  
pp. 327
Author(s):  
Bhagyashri L. Joshi ◽  
Birgitta I. Zielbauer ◽  
Thomas A. Vilgis
Keyword(s):  
Phase Diagram ◽  
Cocoa Butter ◽  
Comparative Study ◽  
Binary Mixtures ◽  
Binary Systems ◽  
Coconut Oil ◽  
Eutectic Type ◽  
Monounsaturated Fat ◽  
Scanning Calorimetry ◽  
Mixing Behavior

The comparative study between the mixing behavior of two binary mixtures of cocoa butter (CB)/tristearin (TS) and cocoa butter (CB)/coconut oil (CO) was investigated by using differential scanning calorimetry (DSC). The DSC profile for CB/TS blends resulted in a monotectic temperature–concentration (T–X) phase diagram, whereas a phase diagram of eutectic type was observed for CB/CO blends at 65 wt % of CO and 35 wt % CB; this suggests that the eutectic crystal can be formed when the saturated fat (blue = CO) is smaller in size compared to monounsaturated fat (orange = CB), whereas, for similar and larger size (red = TS) to CB, phase separation under crystallization is likely to occur (as shown in the graphical abstract). In order to understand the interaction between the binary systems, the profile of the phase diagram was fitted with Bragg–Williams approximation for estimation of the nonideality mixing parameter. Moreover, the morphology of the two different systems by polarized light microscopy (PLM) also depicted the variations in phase behavior by showing a significant change in CB morphology from spherulitic, grainy to granular and needlelike after the addition of TS and CO, respectively. Our findings emphasize the fundamental understanding of the interaction of bulk fat/fat and fat/oil system.

Synergistic Effect of Nano-MoS2 and Anatase Nano-TiO2 on the Lubrication Properties of MoS2/TiO2 Nano-Clusters

2011 ◽  
Vol 43 (1) ◽  
pp. 77-87 ◽  
Author(s):  
Kun Hong Hu ◽  
Fei Huang ◽  
Xian Guo Hu ◽  
Yu Fu Xu ◽  
Yi Qun Zhou
Keyword(s):  
Synergistic Effect ◽  
Nano Tio2 ◽  
Lubrication Properties

scholarly journals Disruption of Lipid Bilayers of Stratum Corneum by Transdermal Delivery of Glipizide in Microemulsion and Binary Co-solvent Systems

2020 ◽  
Vol 19 (1) ◽  
pp. 29-35
Author(s):  
Charles O Nnadi ◽  
Ndidiamaka H Okorie ◽  
Chika J Mbah
Keyword(s):  
Physicochemical Properties ◽  
Stratum Corneum ◽  
Lipid Bilayers ◽  
Binary Systems ◽  
Coconut Oil ◽  
Significant Difference ◽  
Biophysical Analysis ◽  
Effective Delivery ◽  
Franz Diffusion Cells

The study was designed to develop and characterize structured vehicles for effective delivery of glipizide (GPZ) through excised stratum corneum (SC). Several mixed binary systems of ethanol or propylene glycol (PG) were prepared by homogeneous mixing with double distilled water. Different microemulsions were prepared by titration method and their physicochemical properties determined. Transdermal permeation of GPZ was studied in-vitro using modified Franz diffusion cells. Apart from the slight difference in their pH values, there was no significant difference in the physicochemical properties of the drug-loaded coconut oil-based microemulsions and their blank counterparts. Transdermal flux was highest in binary mixtures of 9:1 (v/v) aqueous ethanol (Jss 30.25 ± 5.75 μg/cm2h) and PG (Jss 6.34 ± 1.29 μg/cm2h) compared to their lower strengths. Transdermal GPZ flux, Jss, μg/cm2h was higher in o/w (121.2 ± 9.98) compared to w/o (3.89 ± 0.19) microemulsions with enhanced permeation of ≥ 23 fold using patch size of 10.45 cm2. Biophysical analysis of untreated and treated SC showed that GPZ permeation could depend on the extent of disruption of lipid and protein bilayers of SC by the vehicles. Cremophor RH 40/ethanol/coconut oil-based o/w microemulsion and 9:1 v/v mixed binary systems of ethanol or PG are promising vehicles for delivery of GPZ transdermally. Dhaka Univ. J. Pharm. Sci. 19(1): 29-35, 2020 (June)

Some Results of the Spectroscopic Study of Four Close Binary Systems of Early Spectral Types

1965 ◽  
Vol 5 ◽  
pp. 120-130
Author(s):  
T. S. Galkina
Keyword(s):  
Spectroscopic Study ◽  
Spectral Type ◽  
Spectroscopic Investigation ◽  
Binary Systems ◽  
Quantitative Information ◽  
Close Binary ◽  
Physical Parameters ◽  
Absorption And Emission ◽  
Close Binary Systems ◽  
Quantitative Estimates

It is necessary to have quantitative estimates of the intensity of lines (both absorption and emission) to obtain the physical parameters of the atmosphere of components.Some years ago at the Crimean observatory we began the spectroscopic investigation of close binary systems of the early spectral type with components WR, Of, O, B to try and obtain more quantitative information from the study of the spectra of the components.

Quasi-Periodic Oscillations in Dwarf Novae

1979 ◽  
Vol 46 ◽  
pp. 77-88
Author(s):  
Edward L. Robinson
Keyword(s):  
Binary Systems ◽  
Outer Edge ◽  
Light Curves ◽  
Close Binary ◽  
Bright Spot ◽  
Dwarf Novae ◽  
Periodic Oscillations ◽  
High Frequencies ◽  
Short Period ◽  
Typical Time

Three distinct kinds of rapid variations have been detected in the light curves of dwarf novae: rapid flickering, short period coherent oscillations, and quasi-periodic oscillations. The rapid flickering is seen in the light curves of most, if not all, dwarf novae, and is especially apparent during minimum light between eruptions. The flickering has a typical time scale of a few minutes or less and a typical amplitude of about .1 mag. The flickering is completely random and unpredictable; the power spectrum of flickering shows only a slow decrease from low to high frequencies. The observations of U Gem by Warner and Nather (1971) showed conclusively that most of the flickering is produced by variations in the luminosity of the bright spot near the outer edge of the accretion disk around the white dwarf in these close binary systems.

Bence-albee after 25 years: A new superior α-factor correction procedure for the quantitative analysis of oxides and silicates

1992 ◽  
Vol 50 (2) ◽  
pp. 1744-1745
Author(s):  
John T. Armstrong
Keyword(s):  
Quantitative Analysis ◽  
Electron Microprobe ◽  
Binary Systems ◽  
Correction Procedure ◽  
Geological Samples ◽  
The Past ◽  
Large Matrix ◽  
Computational Speed ◽  
Microprobe Data ◽  
Geological Sciences

One of the most cited papers in the geological sciences has been that of Albee and Bence on the use of empirical " α -factors" to correct quantitative electron microprobe data. During the past 25 years this method has remained the most commonly used correction for geological samples, despite the facts that few investigators have actually determined empirical α-factors, but instead employ tables of calculated α-factors using one of the conventional "ZAF" correction programs; a number of investigators have shown that the assumption that an α-factor is constant in binary systems where there are large matrix corrections is incorrect (e.g, 2-3); and the procedure’s desirability in terms of program size and computational speed is much less important today because of developments in computing capabilities. The question thus exists whether it is time to honorably retire the Bence-Albee procedure and turn to more modern, robust correction methods. This paper proposes that, although it is perhaps time to retire the original Bence-Albee procedure, it should be replaced by a similar method based on compositiondependent polynomial α-factor expressions.

Fractionation of polymethylene chains: An electron crystallographic investigation

1986 ◽  
Vol 44 ◽  
pp. 794-795
Author(s):  
Douglas L. Dorset
Keyword(s):  
Cross Section ◽  
Binary Systems ◽  
Linear Chain ◽  
Pure Component ◽  
Organic Substrates ◽  
Crystallographic Investigation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Molecular Sizes ◽  
The Stability

A variety of linear chain materials exist as polydisperse systems which are difficultly purified. The stability of continuous binary solid solutions assume that the Gibbs free energy of the solution is lower than that of either crystal component, a condition which includes such factors as relative molecular sizes and shapes and perhaps the symmetry of the pure component crystal structures.Although extensive studies of n-alkane miscibility have been carried out via powder X-ray diffraction of bulk samples we have begun to examine binary systems as single crystals, taking advantage of the well-known enhanced scattering cross section of matter for electrons and also the favorable projection of a paraffin crystal structure posited by epitaxial crystallization of such samples on organic substrates such as benzoic acid.

Mesophases Induced in the Binary Systems Consisting of the 4-Dimethylamino-4-Alkoxy and 4-Nitro-4-Alkoxy Derivatives of N-Benzylideneaniline

1986 ◽  
Vol 131 (3) ◽  
pp. 273-283 ◽  
Author(s):  
N. Homura ◽  
Y. Matsunaga ◽  
M. Suzuki
Keyword(s):  
Binary Systems ◽  
Derivatives Of

Binary systems of even-numbered n-alkanes (C2p H4p+2 - C2p+2 H4p+6’ 10 ≤ P ≤ 12)

1993 ◽  
Vol 90 ◽  
pp. 325-332 ◽  
Author(s):  
Z Achour ◽  
JB Bourdet ◽  
M Bouroukba ◽  
M Dirand
Keyword(s):  
Binary Systems
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