Journal of the Turkish Chemical Society, Section A: Chemistry最新文献

{"title":"Electrochemical and in-situ spectroelectrochemical behaviors of non-peripherally tetra substituted zinc(II) and magnesium(II) phthalocyanines","authors":"D. Çubukçu","doi":"10.18596/jotcsa.781748","DOIUrl":"https://doi.org/10.18596/jotcsa.781748","url":null,"abstract":"The electrochemical behaviors of non-peripherally tetra substituted zinc(II) and magnesium(II) phthalocyanines were studied at glassy carbon electrode in N,N-dimethylformamide using cyclic and square wave voltammetry techniques. Electrochemical mechanisms of complexes were illuminated by using the relationship between scan rate and peak current. The complexes exhibited reversible and diffusion controlled behaviors. The effect of metal center on redox properties of complexes were investigated and compared. Zinc and magnesium phthalocyanines showed three reduction redox pairs and one oxidation redox pair, which are similar with small differences in potential during electrochemical measurements. Electrochemical results were supported with in-situ spectroelectrochemical measurements. Moreover, the color changes were recorded and sharp color transitions were observed during the reduction and oxidation redox processes.","PeriodicalId":17402,"journal":{"name":"Journal of the Turkish Chemical Society, Section A: Chemistry","volume":"8 1","pages":"9-20"},"PeriodicalIF":0.0,"publicationDate":"2020-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44836560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The production of antiviral - breathing mask against SARS-CoV-2 using some herbal essential oils","authors":"Adem Önal, Oguz Özbek, Sama Nached","doi":"10.18596/jotcsa.788410","DOIUrl":"https://doi.org/10.18596/jotcsa.788410","url":null,"abstract":"In the fight against the new type of coronavirus (SARS-CoV-2 causing Covid-19), which emerged in China in 2019 and caused the illness and death of many people all over the world, preventive measures come to the fore as vaccines have not yet been produced. These are physical distance, mask use, and hygiene. The use of masks has become mandatory all over the world and the production of alternative masks continues uninterruptedly. In this study, we aimed to produce an effective and breathing mask against the virus using antiviral and aromatic vegetable oils. As a result of the study, 100% cotton fabrics dyed with anti-microbial effective herbal dyes were treated with anti-viral, breathable vegetable oils, and new types of protective masks against coronavirus were produced, and odor emission times of the produced masks were determined.","PeriodicalId":17402,"journal":{"name":"Journal of the Turkish Chemical Society, Section A: Chemistry","volume":"7 1","pages":"821-826"},"PeriodicalIF":0.0,"publicationDate":"2020-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48368117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The phytochemical, proximate and mineral contents of cassava leaves and nutritive values of associated arthropod pests","authors":"A. Sebiomo, F. Banjo","doi":"10.18596/jotcsa.733516","DOIUrl":"https://doi.org/10.18596/jotcsa.733516","url":null,"abstract":"Cassava (Manihot esculenta) is the most important staple food crops grown in Nigeria. This study determined the phytochemical, proximate and mineral contents of cassava leaves and nutritive value of associated arthropod pests. Phytochemicals, proximate, mineral and vitamin contents of samples were analyzed using the method of Association of Official Analytical Chemists. Results showed high amounts of crude protein, crude fat, moisture content, carbohydrate and mineral content in all arthropod insects examined. The highest quantity of Ca (1152.84±0.67 mg/100g) was obtained in ABF4 followed by ABF5 (1148.72±1.09 mg/kg). The lowest phenol content of 0.10±0.00 ppm was obtained in the cassava branch. The leaf recorded the highest phenol value of 0.74±0.01 ppm. Alkaloid had the highest value of 3.51±2.45ppm in Manihot esculenta branch. The highest crude protein and crude fat values of 3.41±0.13 % and 4.83±0.02 % were obtained in ABF5. Vitamin C was found in very high quantities compared to the other types of vitamins examined in this work. The highest Vitamin C content of 34.930±0.136 mg/100g was obtained. Cassava leaves and the arthropod pests are good sources of nutrients. Cassava leaves could also be used as an antimicrobial agent.","PeriodicalId":17402,"journal":{"name":"Journal of the Turkish Chemical Society, Section A: Chemistry","volume":"7 1","pages":"675-690"},"PeriodicalIF":0.0,"publicationDate":"2020-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44628156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Physicochemical Properties and Fatty Acids Composition of Sudanese Moringa Oleifera Seed Oil","authors":"A. Idris, A. H. Nour, Omer Adam Omer Ishag, Mahmoud M Ali, I. Y. Erwa, A. Nour","doi":"10.18596/jotcsa.771260","DOIUrl":"https://doi.org/10.18596/jotcsa.771260","url":null,"abstract":"Moringa oleifera is a robust and fast growing tree considered as one of the most beneficial trees worldwide since almost all parts of it used as food, medicines and for industrial purposes. The aim of this study was to investigate the physicochemical properties and fatty acid composition of M. oleifera seed oil. The oil was extracted by Soxhlet using n-hexane; the physicochemical properties of the seed oil were assessed by standard and established methods, as well the fatty acid composition of the seed oil was determined by GC-MS. The golden yellow with characteristic odor oil obtained from the seeds had the following physicochemical properties: yield, 42.87%; freezing point, 0 °C; melting point, 21 °C; boiling point, 225 °C; refractive index (25 °C), 1.447; iodine value, 96.6 g/100g of oil; peroxide value, 7.6 meq.O2/kg of oil; free fatty acids, 0.07%; acid value, 1.4 mg of KOH/g of oil; saponification value, 185.2 mg KOH/g of oil; unsaponifiable matter, 3.2; moisture and volatile value, 4.91 (wt.%); density, 0.900 g/cm3; viscosity, 60.99 mm2/s; specific gravity, 0.907. The fatty acids composition showed that oleic- acid (51.74%) was the major fatty acid and followed by behenic- (10.54%), palmitic- (9.20%), stearic- (8.46%), arachidic- (6.41%), gondic- (4.88%), lignoceric- (3.08%) and palmitoleic acid (2.85%). Therefore, more and advanced research should be undertaken for this abundant source of natural oil for edible oil and possible industrial applications.","PeriodicalId":17402,"journal":{"name":"Journal of the Turkish Chemical Society, Section A: Chemistry","volume":"7 1","pages":"911-920"},"PeriodicalIF":0.0,"publicationDate":"2020-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43058518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"VERMICOMPOST AS A POTENTIAL ADSORBENT FOR THE ADSORPTION OF METHYLENEBLUE DYE FROM AQUEOUS SOULUTIONS","authors":"Z. Ciğeroğlu, Eyup Yildirir","doi":"10.18596/jotcsa.784357","DOIUrl":"https://doi.org/10.18596/jotcsa.784357","url":null,"abstract":"Abstract: Vermicompost (VC) as a low cost and waste-derived material was used as an adsorbent to remove textile dye effluents from the wastewater. Methylene blue (MB) was selected as a representative of dye effluents and its adsorption to VC was investigated. The effect of parameters such as pH, adsorption time, and the initial concentration of MB were determined via lab-scale batch experiments. The highest adsorption capacity of VC was reached when the pH of the solution was 4. The equilibrium was maintained after 90 minutes of operation since the removal percentage of MB was stabilized at 99%. The pseudo-second-order kinetic model described the most appropriate adsorption kinetic behavior. Both Langmuir (R 2 =0.9891) and Freundlich isotherms (R 2 =0.9895) fitted very well to the experimental data. Based on these results, vermicompost can be evaluated as an alternative adsorbent for the removal of dye effluents.","PeriodicalId":17402,"journal":{"name":"Journal of the Turkish Chemical Society, Section A: Chemistry","volume":"7 1","pages":"893-902"},"PeriodicalIF":0.0,"publicationDate":"2020-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46802530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Chemical Composition and Antioxidant Activities of Leaf and Flower Essential Oils of Origanum onites L. Growing in Mount Ida-Turkey","authors":"Züleyha Özer","doi":"10.18596/jotcsa.780334","DOIUrl":"https://doi.org/10.18596/jotcsa.780334","url":null,"abstract":"The chemical composition of leaf and flower essential oils of Origanum onites L. were analyzed using Thermo Scientific TSQ GC-MS/MS. Also, antioxidant activities of the leaf and flower essential oils were investigated by using DPPH (1,1-diphenyl-2-picrylhydrazyl) free radical scavenging activity and β-carotene linoleic acid assays. BHA (Butylated hydroxyanisole) and BHT (Butylated hydroxytoluene) were used as standards. The essential oil yields of O. onites were 1.75 % for leaves, and 4.25 % for flowers. A total of twenty-three compounds representing 99.9 % of leaf oil and twenty-four compounds constituted 99.6 % of the flower oil were determined. Oxygenated monoterpenes were detected at a high percentage (69.2 %) in leaf essential oil and carvacrol (64.9 %) was determined as the main compound. Also, flower essential oil was dominated by sesquiterpene hydrocarbons (73.5 %) and α-cubebene (36.4 %) was determined as major compound. For leaf oil, a high antioxidant capacity was determined, primarily due to carvacrol and p-cymene.","PeriodicalId":17402,"journal":{"name":"Journal of the Turkish Chemical Society, Section A: Chemistry","volume":"7 1","pages":"813-820"},"PeriodicalIF":0.0,"publicationDate":"2020-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46719745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Angelica TatianaeBordz new distribution areas and study their coumarin derivatives","authors":"H. Mammadova, S. Mashayeva","doi":"10.18596/jotcsa.668971","DOIUrl":"https://doi.org/10.18596/jotcsa.668971","url":null,"abstract":"There are nearly 4500 kinds of plants in Azerbaijan flora. Among these plants, the Apiaceae Lindl family takes a special place. This family is represented in the world with 400 genders. Among the genders including this family Angelica L. Gender attracts attention for its specific features. There are 115 types of this gender in the world (plant list 2013, 115), (plant list 2018, 116) [1]. In Azerbaijan flora, Angelica L. gender is represented with 3 types: Angelica TatianaeBordz, A.sachokiana, and Angelica Purpurascens [2]. Angelica L. gender is a rare kind of Azerbaijan flora. A.Tatianae is a noticeable perennial plant. A.Tatianae is a very valuable medicinal plant with 1-1,5m height and an empty stem. It passes to the blooming phase in July, the flowers are white. The length of the petals is about 1-2mm. The columns are short cone-shaped. The column is much longer than under columns and they are folded. The length of the umbrellas consists of various, roughly 25-35 rays. The petals are white and are gathered in the umbrella flower group. The sizes of the edge and middle flowers are different. The grown seeds are wide oval-shaped, backbones are narrow, from sides are large winged, above is naked. The length of the seed is 10 mm; the width is 5-6mm and consists of ribs. The seed has a specific dark smell. The leaf limb is wide triangle-shaped, consists of 3 parts, it is featherlike, the length is about 30 cm, initial slices of a leaf are wide egg-shaped and the length is 20-25cm. The deep featherlike cut sharply pointed part is 6-8cm. The edges are unequal sharp cogged; the veinlet is short-hairy especially at the bottom part. Inside the stem is empty. It has a bitter taste. Coumarins are widely spread in types of Apiaceae, especially in the genus Angelica L. Root parts of Angelica Tatianae type which were gathered from the west part of the Azerbaijan Gadabay region were cut, dried and substance mixture (17g) was used by extraction with (120g) alcohol 3 times. Three substances were extracted from chromatography of extracts from the root system of AngeliciaTatianae. The structures of matter are determined chemically and spectrally. The thin layer chromatography method was used to determine the individuality of the substances derived from the root of the plant, which has been identified as substances isopimpinellin, coumarin, xanthotoxin.","PeriodicalId":17402,"journal":{"name":"Journal of the Turkish Chemical Society, Section A: Chemistry","volume":"7 1","pages":"745-752"},"PeriodicalIF":0.0,"publicationDate":"2020-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67537110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis and Characterization of New Dithiophosphonate and Ni(II) Complexes from Novel 2,4-bis(methoxytolyl)-1,3-dithia-2,4-diphosphetane 2,4-disulfides","authors":"Ertuğrul Gazi SAĞLAM SAĞLAM, E.Bulat Elif Bulat, H. Yılmaz","doi":"10.18596/jotcsa.773478","DOIUrl":"https://doi.org/10.18596/jotcsa.773478","url":null,"abstract":"Two new perthiophosphonic acid anhydrides, 2,4-bis(Rx,y)-1,3-dithia-2,4-diphosphetane 2,4-disulfide (Rx=3-methoxytolyle, SAV-B1 and Ry=2-methoxytolyle, SAV-B2) were synthesized. From the reaction of these dimers, (Rx,y‐P(S)S)2, with alcohols and then dry ammonia gas, ammonium salts of the dithiophosphonic acids ((Rx,y)(RnO)PS2H), Rn, R1= ethyl-, R2= 2-propyl-), namely, four new compounds of the type [NH4][S2P(Rx,y)(ORn)] were obtained. The ammonium salts were further reacted with NiCl2.6H2O to prepare four new dithiophosphonato nickel(II) complexes, [Ni(S2P(Rx,y)(ORn))]. The ligands and the complexes were characterized by mass-(ESI), 1H-, 13C-, 31P-NMR, IR-spectroscopy, HSQC techniques and elemental analyses. Complementary structural information was provided by the HSQC spectra of the [NH4][S2P(Rx,y)(OR2)]. The structure of the perthiophosphonic acid anhydrides were deduced from the structures of dithiophosphonates thereof.","PeriodicalId":17402,"journal":{"name":"Journal of the Turkish Chemical Society, Section A: Chemistry","volume":"7 1","pages":"789-800"},"PeriodicalIF":0.0,"publicationDate":"2020-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44372564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Effects of Blending Ratio of Poly(lactic acid)/POSS Cored Star Poly(ε-caprolactone) Biopolymers","authors":"M. D. Doganci","doi":"10.18596/jotcsa.752190","DOIUrl":"https://doi.org/10.18596/jotcsa.752190","url":null,"abstract":"Abstract: A8-type eight-arm star-shaped poly(e-caprolactone) (PCL) polymers with polyhedral oligomeric silsesquioxane (POSS) (SP) core having different molecular weight with different chain lengths (n=10, 20, 30, and 50 repeating units) were synthesized via arm-first approach by combination of ring-opening polymerization (ROP) and “click” chemistry reactions. The obtained polymers were then melt-blended with neat poly(lactic acid) (PLA) to improve some of the properties like toughness of PLA. These blends were prepared depending on the blend ratio (95/5 and 80/20 wt%) via utilizing laboratory scale twin-screw mini extruder to examine morphological, thermal and mechanical properties of PLA/SP composite as a function of SP and blending ratio. In addition, the PLA/SP composites containing a blend ratio of 90/10 wt% which were prepared in the previous study was used to compare with other composite having different blend ratio. The incorporation of SP polymers improved some of the mechanical properties of PLA. It was verified that SP20 (n=20) is the most proper SP-type for enhancing the mechanical behavior of PLA at a blending ratio of 90/10. Also, 1,4-phenylene diisocyanate (PDI) which was used as a commercial compatibilizer was incorporated to blends at fixed amount (%1). It is concluded that the incorporation of SP polymers into PLA matrix decreased the tensile modulus with increasing blending ratio and increased the elongation at break values in the presence of PDI.","PeriodicalId":17402,"journal":{"name":"Journal of the Turkish Chemical Society, Section A: Chemistry","volume":"7 1","pages":"649-660"},"PeriodicalIF":0.0,"publicationDate":"2020-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48479341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis and characterization of Bi17Ba0,45V2,1-xPxO31,2composite and their application as heterogeneous catalysts in biscoumarin derivatives synthesis","authors":"Soumya Ferraa, Y. Merroun, H. Barebita, Abderrazak Nimour, T. Guedira, R. Ghailane, A. Souizi","doi":"10.18596/JOTCSA.624653","DOIUrl":"https://doi.org/10.18596/JOTCSA.624653","url":null,"abstract":"","PeriodicalId":17402,"journal":{"name":"Journal of the Turkish Chemical Society, Section A: Chemistry","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43892864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}