scholarly journals Evaluation of Natural Oil Adducts in Alkyd-Based Varnish Emulsion and Effect on Rowan (Sorbus torminalis) Wood

2021 ◽  
pp. 56-63
Author(s):  
Halil Turgut Sahin
Keyword(s):  
Surface Coating ◽  
Surface Hardness ◽  
Grape Seed ◽  
Scratch Resistance ◽  
Sesame Oil ◽  
Apricot Kernel ◽  
Sorbus Torminalis ◽  
Natural Oil ◽  
Apricot Kernel Oil ◽  
Coating Agents

In these days, preparation of eco-friendly wood surface coating agents has become important topic for environmental concerns. In this study, an alternative surface coating formulations was prepared with adducts of oils of apricot kernel (A), sesame (S) and grape seed (G) were mixed with oil modified alkyd-based synthetic varnish system. These emulsions were applied on Rowan (Sorbus  torminalis)  wood and exposed artificial UV irradiation. However, all emulsion coated samples show lower water sorptions regardless of conditions or level of treatments. Increasing adduct charges from 5.0% to 10% have not considerably effects for water sorptions. The reducing water sorption properties of 35.5%, 35.2% and 39.4% were obtained with 10% sesame oil-varnish coated samples of 10Sı and 10 Sıı in one- and two-time coatings and three-times coated samples of 5Sııı in 5.0% sesame oil-varnish emulsion coatings, respectively. Moreover, selected oil adducts into varnish had one and two point lowering effects on coated surface hardness (in 4H-5H levels).  The UV exposure seems to not much influence on surface hardness properties. The similar tendency were also observed for cross-cut resistance that marginally similar adhesion (scratch resistance)  for both control and UV exposured samples.  Increasing coatings and charge of apricot kernel oil in varnish emulsion looks like more effective than other varnish formulations, in terms of gloss stability. However, increasing adducts charges and UV radiation time, have more less similar effects on all coated and UV irradiated samples.

scholarly journals A Study on Surface Physicochemical Properties of Woods Treated in Emulsion of Waterborne Varnish with Sesame and Grape Seed Oil

2021 ◽  
pp. 1-9
Author(s):  
Halil Turgut Sahin ◽  
Ismail Erbil
Keyword(s):  
Surface Energy ◽  
Wood Surface ◽  
Seed Oil ◽  
Grape Seed ◽  
Scratch Resistance ◽  
Test Methods ◽  
Sesame Oil ◽  
Grape Seed Oil ◽  
Surface Physicochemical Properties ◽  
Coated Surfaces

Aims: An eco-friendly coating emulsion prepared with mixture of oils of sesame and grape seed and alkyd-based waterborne varnish. The prepared emulsion applied four different wood substrates (walnut, beech, cedar and fir) in order to be investigated for some selected surface properties. Study Design: Several test methods were used to evaluate surface physicochemical properties of the coatings. The results obtained may be suggested for the selection of the best varnish-emulsion formulation for the improvement wood substrates and could provide useful evaluation of the test methods employed. Methodology: The wood species of Beech (Fagus sylvatica), Walnut (Juglans regia), Cedar (Cedrus libani) and Fir (Abies nordmandiana) were selected for the investigation. Commercially available alkyd based waterborne varnish was supplied ready to use form. Both sesame oil (Sesamum indicum L.) and grape seed oil (Vitis vinifera L.) were obtained from a company that produces them by the cold press technique commercially. Both oils were used as supplied, without additional processing. These oils were added to varnish at 10% and 20% proportions (volume/volume). The 5 μl of distilled water (surface tension of 72.6 mN /m) was applied on wood surface by a sessile droplet method to measure surface contact angles. The surface hardness and scratch resistance of the cured varnish layers on wood substrates were measured with using pencil hardness test procedure according to ASTM-D-3363 standard. Cross cut test also conducted according to EN ISO 2409 standard. Experimental Findings: It was found that coated walnut samples show 9.8 to 13.5° higher contact angle values in all directions while other three wood samples only show marginally different values (0.1 to 4.3°). The highest contact value of 35.9° and 35.8° was found with samples of Wg20 and Wg10 which treated 20- and 10% grape seed oil proportions in varnish emulsion. The oils of sesame and grape seed typically contain various proportions of fatty acids fractions which are constituents of a carboxylic acid with a long, aliphatic tail. These groups could be created a strong bond in combination with alkyd resin on wood surface. However, the surface energy distribution show only marginally changes regardless of treatment levels and conditions. Therefore, there is not any clear advantage observed on surface wood surface energy levels with coating applications. For 10% grape seed oil/varnish emulsion conditions, the hardness of coated surfaces found to be 3H, 3H, 2H, 2H for walnut, beech, fir and cedar, respectively. At 20% grape seed oil/varnish coatings, all coating surfaces show H level range. For cross hatch experiments, marginally similar trend was observed with 10-and 20% grape seed oil/varnish and 10% sesame oil/varnish emulsion coated wood species. Moreover, it was ranked 2 for fir, ranked 3 for beech and ranked 4 for cedar wood at 20% sesame oil/varnish emulsion coatings. It is noticeable that a correlation was observed between cross cut and surface scratch resistance properties with coated surfaces.

scholarly journals Inclusion of Medium-Chain Triglyceride in Lipid-Based Formulation of Cannabidiol Facilitates Micellar Solubilization In Vitro, but In Vivo Performance Remains Superior with Pure Sesame Oil Vehicle

Pharmaceutics ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1349
Author(s):  
Wanshan Feng ◽  
Chaolong Qin ◽  
Elena Cipolla ◽  
Jong Bong Lee ◽  
Atheer Zgair ◽  
...  
Keyword(s):  
Medium Chain Triglyceride ◽  
Sesame Oil ◽  
Water Soluble ◽  
Lymphatic Transport ◽  
Micellar Solubilization ◽  
Micellar Phase ◽  
Medium Chain ◽  
Natural Oil

Oral sesame oil-based formulation facilitates the delivery of poorly water-soluble drug cannabidiol (CBD) to the lymphatic system and blood circulation. However, this natural oil-based formulation also leads to considerable variability in absorption of CBD. In this work, the performance of lipid-based formulations with the addition of medium-chain triglyceride (MCT) or surfactants to the sesame oil vehicle has been tested in vitro and in vivo using CBD as a model drug. The in vitro lipolysis has shown that addition of the MCT leads to a higher distribution of CBD into the micellar phase. Further addition of surfactants to MCT-containing formulations did not improve distribution of the drug into the micellar phase. In vivo, formulations containing MCT led to lower or similar concentrations of CBD in serum, lymph and MLNs, but with reduced variability. MCT improves the emulsification and micellar solubilization of CBD, but surfactants did not facilitate further the rate and extent of lipolysis. Even though addition of MCT reduces the variability, the in vivo performance for the extent of both lymphatic transport and systemic bioavailability remains superior with a pure natural oil vehicle.

Apricot Kernel Oil Ameliorates Cyclophosphamide-Associated Immunosuppression in Rats

Lipids ◽  
2016 ◽  
Vol 51 (8) ◽  
pp. 931-939 ◽  
Author(s):  
Honglei Tian ◽  
Haiyan Yan ◽  
Siwei Tan ◽  
Ping Zhan ◽  
Xiaoying Mao ◽  
...  
Keyword(s):  
Apricot Kernel ◽  
Kernel Oil ◽  
Apricot Kernel Oil

Study of Interlayer Element Effect on Properties of AlCrTiSiN Thin Film

2014 ◽  
Vol 893 ◽  
pp. 543-549 ◽  
Author(s):  
Tharanon Usana-Ampaipong ◽  
Sirawut Prapasuk ◽  
Kawiphong Feung-Im ◽  
Karuna Tuchinda ◽  
Kessaraporn Wathanyu ◽  
...  
Keyword(s):  
High Temperature ◽  
Physical Vapor Deposition ◽  
Room Temperature ◽  
Coefficient Of Thermal Expansion ◽  
Wear Behavior ◽  
Cutting Tools ◽  
Surface Hardness ◽  
Scratch Resistance ◽  
Tribological Performance ◽  
Cathodic Arc

In this work, the effect of different interlayer elements on the properties of the top AlCrTiSiN film, i.e. titanium and chromium called as Ti/AlCrTiSiN and Cr/AlCrTiSiN, respectively, was studied. The film was deposited by cathodic arc physical vapor deposition on tungsten carbide (WC) specimen which is extensively used as cutting tools material. Various properties including the surface hardness, the scratch resistance and tribological performance were later studied. The surface hardness of both Ti/AlCrTiSiN and Cr/AlCrTiSiN coatings were higher than 29 GPa. The critical load for both coating suggesting supurb adhesion strength of the coating system. However, Ti interlayer was found to result in higher critical compressive stress for first damage and full delamination at room temperature. The wear resistance of coated specimens was far better than the uncoated one both at room temperature and high temperature, i.e. ball on disc tests at room temperature, 300 °C, and 500 °C were performed. The coeeficient of friciton of both coatings were found to depend strongly on the wear behavior of the system and the characters of the wear debris. A sign of better tribological performance at high temperature, i.e. 500°C, could be noticed with Cr interlayer as the lower mismatch in coefficient of thermal expansion became more crucial in film damage phenomina at such temperature.

scholarly journals Effect of Apricot Kernel Oil on Serum Response of Rainbow Trout (Oncorhynchus mykiss)

2021 ◽  
Vol 9 (1) ◽  
pp. 258-262
Author(s):  
Ünal İspir ◽  
Mikail Özcan
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Bactericidal Activity ◽  
Prunus Armeniaca ◽  
Apricot Kernel ◽  
Protein Levels ◽  
Kernel Oil ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Prunus Armeniaca L ◽  
Apricot Kernel Oil

Rainbow trout (Oncorhynchus mykiss) were examined effects of apricot kernel oil (Prunus armeniaca L.) on the immune mechanisms. After Fish weight 40 ±0,03 g was intraperitoneal (i.p.) injection 1% and 10% apricot kernel oil (AKO), blood was taken from the caudal vein of anesthetized (50 ppm, benzocaine) fish. Myeloperoxidase production (MPO), Serum bactericidal activity, protein levels, Lysozyme response (LYS) and total immunoglobulin (Ig) were determined on days 3, 7, 14 and 21. The same strategy was conducted on a control bunch. No contrasts were found within the levels of immunuglobulin between the control and test groups. However, there were considerable increases in bactericidal activity, MPO, LYS, protein levels and important differences were detected between the control and experimental groups. AKO can be utilized to improve the resistant instruments of rainbow trout.

scholarly journals Comparative Evaluation of effect of resin protective coatings on the surface hardness and shear punch strength of different GlCs - An InVitro Study

2021 ◽  
Vol 19 (3) ◽  
pp. 160-165
Author(s):  
N. Mishra ◽  
M. Agarwal ◽  
M. P. Singh ◽  
A. Khullar ◽  
K. Magwa ◽  
...  
Keyword(s):  
Shear Strength ◽  
Clinical Practice ◽  
Protective Coating ◽  
Surface Coating ◽  
Comparative Evaluation ◽  
Protective Coatings ◽  
Surface Hardness ◽  
Daily Clinical Practice ◽  
Glass Ionomer ◽  
Shear Punch

G-Coat Plus is a nano-filled, self-adhesive light cured protective coating that strengthens, protects and enhances glass ionomer restorations. The effect of G- Coat plus on different GICs have not been studied comprehensively. Hence the study was conducted to compare the effect of resin coating on surface hardness and Shear punch strength of newer modified GIC.Materials and methods: 120 samples of three GICs i.e. Fuji IX Extra, Fuji IX Fast, Fuji II LC were prepared using specialized metal moulds. Specimens of Fuji II LC were light cured for 20 seconds. Coated and uncoated samples were tested for surface hardness and 30 samples were tested for shear punch strength. P < 0.05 was considered as significant. Results: Shear Punch Strength after G-Coat plus coating was significantly higher for Fuji IX Extra followed by Fuji II LC. Surface Hardness after G- Coat plus coating was significantly higher for Fuji IX Extra followed by Fuji IX Fast and Fuji II LC.Conclusion: Surface coating by a resin agent significantly increases the surface hardness and shear strength of the GIC. Considering the above stated findings, they can be incorporated into daily clinical practice to enhance the strength and longevity of GIC.

scholarly journals Enzymatic pre-treatment in cold pressing: Influence on flaxseed, apricot kernel and grape seed oils

2021 ◽  
Vol 72 (4) ◽  
pp. e432
Author(s):  
A. Candan ◽  
D. Arslan
Keyword(s):  
Antioxidant Capacity ◽  
Seed Oil ◽  
Radical Scavenging ◽  
Grape Seed ◽  
Raw Material ◽  
Seed Oils ◽  
Total Carotenoids ◽  
Cold Pressing ◽  
Apricot Kernel ◽  
Pre Treatment

A commercial enzyme preparation consisting of pectolytic, cellulotic and hemicellulotic enzymes was applied to the oil extraction by cold pressing from apricot kernel, flaxseed and grape seed. The effects of enzyme pre-treatment varied depending on the different oil seed used as raw material. Although the increase in free fatty acidity can be considered as a negative effect (from 0.37 to 0.52), the decrease in peroxide number and p-anisidine values, increase in oil yield (22.75%), higher levels of total carotenoids and tocopherols, as well as a remarkable increase in phenolic content (x1.68) and radical scavenging effect (including hydrophilic and lipophilic-induced and total antioxidant capacity) showed that the use of enzyme application in the cold pressing of apricot kernel oil would be beneficial. Many of these positive results could not be achieved in the pressing of flaxseed or grape seed oils under the same conditions. A high negative correlation (r=-92.2) was found between p-anisidine value and δ-tocopherol for grapeseed oil. Hydrophilic and lipophilic antioxidant capacity, total phenolics, and total carotenoids negatively correlated well (r values above 80) with peroxide values for apricot seed oil. Correlation results showed that carotenoids play an important role in the oxidative stability of the oils, where it was much more evident for apricot seed oil (r=-97.5).

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