The study aimed to provide sustainable alternatives to reduce industries’ over-reliance on edible vegetable oil for alkyd resin preparation as applicable in paint production. Alkyd resins were synthesized and characterized from sponge (Luffa aegyptiaca) seed oil. Condensation polymerization of monoglyceride with phthalic and maleic anhydride was carried out, and physico-chemical parameters such as drying time, total solids, viscosity, and chemical resistance were investigated following standard procedures. UV–visible, FT-IR, 1H, and 13C NMR spectroscopies were used to characterize the prepared alkyd resins. Sponge seed oil alkyd resins prepared with maleic anhydride (SPOMA) had a higher percentage yield (77.56%) than sponge seed oil prepared using phthalic anhydride (SPOPA) with 64.44%. The two alkyd resins showed a better drying time of 40 – 50 min than their commercial counterparts (70 min). This was attributed to the high degree of unsaturation of the seed oil due to the considerable proportion of linoleic acid in the seed oil. The alkyd resins were largely stable in 0.1 M HCl, 5% NaCl, and 0.1 M KOH, which caused the alkyd resins to whiten and shrink. The resins were generally soluble in xylene, kerosene, and petroleum ether. The nature of the alkyd resin can be described as nonpolar. This observation was consistent with the literature report. This study concluded that quality or industrial-grade alkyd resins could be prepared from sponge seed oil and thereby serve as a cheap and viable replacement for edible oils used in industries.
{"title":"Synthesis and Chemical Characterization of Alkyd Resins Using Maleic and Phthalic Anhydrides and Seed oil of Luffa aegyptiaca","authors":"Marili Funmilayo ZUBAİR, Sulyman Olalekan IBRAHİM, Kenneth STEPHEN, Abdulmumeen Amao HAMİD, Olamilekan IBUKUN, Olubunmi ATOLANİ","doi":"10.18596/jotcsa.1256237","DOIUrl":"https://doi.org/10.18596/jotcsa.1256237","url":null,"abstract":"The study aimed to provide sustainable alternatives to reduce industries’ over-reliance on edible vegetable oil for alkyd resin preparation as applicable in paint production. Alkyd resins were synthesized and characterized from sponge (Luffa aegyptiaca) seed oil. Condensation polymerization of monoglyceride with phthalic and maleic anhydride was carried out, and physico-chemical parameters such as drying time, total solids, viscosity, and chemical resistance were investigated following standard procedures. UV–visible, FT-IR, 1H, and 13C NMR spectroscopies were used to characterize the prepared alkyd resins. Sponge seed oil alkyd resins prepared with maleic anhydride (SPOMA) had a higher percentage yield (77.56%) than sponge seed oil prepared using phthalic anhydride (SPOPA) with 64.44%. The two alkyd resins showed a better drying time of 40 – 50 min than their commercial counterparts (70 min). This was attributed to the high degree of unsaturation of the seed oil due to the considerable proportion of linoleic acid in the seed oil. The alkyd resins were largely stable in 0.1 M HCl, 5% NaCl, and 0.1 M KOH, which caused the alkyd resins to whiten and shrink. The resins were generally soluble in xylene, kerosene, and petroleum ether. The nature of the alkyd resin can be described as nonpolar. This observation was consistent with the literature report. This study concluded that quality or industrial-grade alkyd resins could be prepared from sponge seed oil and thereby serve as a cheap and viable replacement for edible oils used in industries.","PeriodicalId":17402,"journal":{"name":"Journal of the Turkish Chemical Society, Section A: Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136081169","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}
With the help of molecular imprinting technology, artificial receptors can be made and used for identification. This technique's limitless application increases polymer technology and makes it adaptable to other technologies. In this study, examples of sensor applications are used to explain molecular imprinting technology (MIT) and its brief history. MIT can be used to create polymer-based artificial receptors with remarkable selectivity and affinity to detect any target molecules that can be imprinted on a polymer. A monomer is synthesized around a template molecule to create a selective cavity that serves as an artificial receptor. Molecularly imprinted polymers (MIP) offer a wide range of uses and have recently garnered much attention. These polymers' production methods, production kinds, and molecular imprinting techniques are all thoroughly detailed. The outstanding properties of MIPs make a crucial contribution to sensor applications offering selective, fast, easy, and cost-effective analysis, which became very popular after Clark published his first biosensor study. Apart from the biological recognition receptors, MIPs have the advantage that they are not affected by physical conditions of the environment, such as temperature, pH, and ion strength. To overcome the biological recognition receptors' disadvantages, molecularly imprinted polymers can be used for sensor development. From the point of view of the review, the combination of MIPs and sensors was explained and proposed as an informative paper.
{"title":"The Role of Molecularly Imprinted Polymers In Sensor Technology: Electrochemical, Optical and Piezoelectric Sensor Applications","authors":"Hilmiye Deniz ERTUĞRUL UYGUN, Münire Nalan DEMİR","doi":"10.18596/jotcsa.1285655","DOIUrl":"https://doi.org/10.18596/jotcsa.1285655","url":null,"abstract":"With the help of molecular imprinting technology, artificial receptors can be made and used for identification. This technique's limitless application increases polymer technology and makes it adaptable to other technologies. In this study, examples of sensor applications are used to explain molecular imprinting technology (MIT) and its brief history. MIT can be used to create polymer-based artificial receptors with remarkable selectivity and affinity to detect any target molecules that can be imprinted on a polymer. A monomer is synthesized around a template molecule to create a selective cavity that serves as an artificial receptor. Molecularly imprinted polymers (MIP) offer a wide range of uses and have recently garnered much attention. These polymers' production methods, production kinds, and molecular imprinting techniques are all thoroughly detailed. The outstanding properties of MIPs make a crucial contribution to sensor applications offering selective, fast, easy, and cost-effective analysis, which became very popular after Clark published his first biosensor study. Apart from the biological recognition receptors, MIPs have the advantage that they are not affected by physical conditions of the environment, such as temperature, pH, and ion strength. To overcome the biological recognition receptors' disadvantages, molecularly imprinted polymers can be used for sensor development. From the point of view of the review, the combination of MIPs and sensors was explained and proposed as an informative paper.","PeriodicalId":17402,"journal":{"name":"Journal of the Turkish Chemical Society, Section A: Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136243456","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}
The indoor radon concentration of 100 primary schools in Al-Najaf province, Iraq, was measured to determine students’ and staff's safety in these schools using a CR-39 nuclear track detector based on the sealed can improve technique. The results of indoor radon concentration for all schools vary from (7.47 to 44.84) Bq / m3 with an arithmetic mean (AM) of 22.26 Bq /, while the geometric mean (GM) was 20.67 Bq / m3. The concentration of 222Rn was lower than the worldwide level. Some radiological parameters like annual effective dose (AED), potential alpha energy (PAEC), exposure to radon progeny (EP), and lung cancer cases per year per million people (CPPP) were also determined. The results of these parameters point toward normal levels in the primary schools, according to ICRP, UNCER, and NCRP data.
{"title":"Radon gas in indoor air of primary schools of Al-Najaf city, Iraq","authors":"Rukia Jabar DOSH, Ali K HASAN, Ali ABOJASSİM","doi":"10.18596/jotcsa.1193534","DOIUrl":"https://doi.org/10.18596/jotcsa.1193534","url":null,"abstract":"The indoor radon concentration of 100 primary schools in Al-Najaf province, Iraq, was measured to determine students’ and staff's safety in these schools using a CR-39 nuclear track detector based on the sealed can improve technique. The results of indoor radon concentration for all schools vary from (7.47 to 44.84) Bq / m3 with an arithmetic mean (AM) of 22.26 Bq /, while the geometric mean (GM) was 20.67 Bq / m3. The concentration of 222Rn was lower than the worldwide level. Some radiological parameters like annual effective dose (AED), potential alpha energy (PAEC), exposure to radon progeny (EP), and lung cancer cases per year per million people (CPPP) were also determined. The results of these parameters point toward normal levels in the primary schools, according to ICRP, UNCER, and NCRP data.","PeriodicalId":17402,"journal":{"name":"Journal of the Turkish Chemical Society, Section A: Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135876844","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}
In this study, oleic acid-PVA based amphiphilic polymer micelles were prepared for vitamin D encapsulation. The amphiphilic polymer encapsulations were characterized using Fourier transformed infrared spectroscopy (FTIR) and nuclear magnetic resonance spectroscopy (1H-NMR). The goal of the study was to create micelles by using a lipophilic and biocompatible polymer. An oleic acid-substituted polyvinyl alcohol polymer was created through an acidic esterification reaction. The chemical structure of the polymer was disclosed by FTIR. To calculate the polymer's substitution ratio, 1H-NMR was used. Micellization was used to encapsulate vitamin D. Scanning electron microscope (SEM) analysis was used to determine the crucial micelle concentration and the size of the oleic acid-modified PVA. Ultraviolet–visible (UV) spectroscopy was used to analyze the release of vitamin D at various pH levels. As a result, vitamin D can be enclosed in PVA polymer that has been substituted with oleic acid.
{"title":"Oleic Acid-PVA Based Amphiphilic Polymer Micelles for Vitamin D Encapsulation","authors":"Hatice BİRTANE","doi":"10.18596/jotcsa.1317320","DOIUrl":"https://doi.org/10.18596/jotcsa.1317320","url":null,"abstract":"In this study, oleic acid-PVA based amphiphilic polymer micelles were prepared for vitamin D encapsulation. The amphiphilic polymer encapsulations were characterized using Fourier transformed infrared spectroscopy (FTIR) and nuclear magnetic resonance spectroscopy (1H-NMR). The goal of the study was to create micelles by using a lipophilic and biocompatible polymer. An oleic acid-substituted polyvinyl alcohol polymer was created through an acidic esterification reaction. The chemical structure of the polymer was disclosed by FTIR. To calculate the polymer's substitution ratio, 1H-NMR was used. Micellization was used to encapsulate vitamin D. Scanning electron microscope (SEM) analysis was used to determine the crucial micelle concentration and the size of the oleic acid-modified PVA. Ultraviolet–visible (UV) spectroscopy was used to analyze the release of vitamin D at various pH levels. As a result, vitamin D can be enclosed in PVA polymer that has been substituted with oleic acid.","PeriodicalId":17402,"journal":{"name":"Journal of the Turkish Chemical Society, Section A: Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135876850","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}
Anthony U AWODE, Sunday ELAİGWU, Akeem A OLADİPO, Osman YILMAZ, Mustafa GAZİ
A new hydrogel based on vinylsilane-chitosan and acrylamide was synthesized as VSi-CTS-g-PAAm and was used to remove methylene blue (MB) from aqueous solution using batch adsorption technique. The VSi-CTS-PAAm hydrogel interacted with methylene blue (MB) dye solution at different mass-liquid ratios, pH, and temperature. The amount of MB dye removal was estimated using a UV-Vis spectrophotometer at an optical density of λmax= 665 nm. The MB dye removal was most effective at pH 12, with about 98 % removal at 50 °C. The study's findings also indicated that the equilibrium data exhibited the highest degree of conformity with the Langmuir isotherm model. Additionally, the adsorption process adhered to the pseudo-second-order kinetics and was characterized as endothermic. Therefore, our study suggests that the utilization of prepared materials may have potential advantages in treating wastewater containing dyes.
{"title":"Removal of Methylene Blue Dye from Aqueous Solution Using Trichlorovinylsilane Chitosan–g–polyacrylamide Hydrogel","authors":"Anthony U AWODE, Sunday ELAİGWU, Akeem A OLADİPO, Osman YILMAZ, Mustafa GAZİ","doi":"10.18596/jotcsa.1292604","DOIUrl":"https://doi.org/10.18596/jotcsa.1292604","url":null,"abstract":"A new hydrogel based on vinylsilane-chitosan and acrylamide was synthesized as VSi-CTS-g-PAAm and was used to remove methylene blue (MB) from aqueous solution using batch adsorption technique. The VSi-CTS-PAAm hydrogel interacted with methylene blue (MB) dye solution at different mass-liquid ratios, pH, and temperature. The amount of MB dye removal was estimated using a UV-Vis spectrophotometer at an optical density of λmax= 665 nm. The MB dye removal was most effective at pH 12, with about 98 % removal at 50 °C. The study's findings also indicated that the equilibrium data exhibited the highest degree of conformity with the Langmuir isotherm model. Additionally, the adsorption process adhered to the pseudo-second-order kinetics and was characterized as endothermic. Therefore, our study suggests that the utilization of prepared materials may have potential advantages in treating wastewater containing dyes.","PeriodicalId":17402,"journal":{"name":"Journal of the Turkish Chemical Society, Section A: Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135875910","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}
For the quantitative measurement of Dapagliflozin propanediol monohydrate and Teneligliptin hydrobromide hydrate in synthetic mixture form in the presence of its degradants, precise, accurate, robust, cost-effective, and isocratic stability indicating RP-HPLC method was developed and validated. The mobile phase comprises [Methanol: 20 mM Ammonium formate (70:30 v/v)] at a flow rate of 1.0 ml/min, injection volume of 20 µl, and UV detection at 225 nm. Separation was accomplished using Gemini, C18 column. Teneligliptin hydrobromide hydrate and Dapagliflozin propanediol monohydrate were eluted with retention times of 6.65 minutes and 4.20 minutes, respectively. This procedure was approved following ICH guideline Q2 (R1). The calibration plots for Dapagliflozin propanediol monohydrate and Teneligliptin hydrobromide hydrate have correlation coefficients of 0.9995 and 0.9996 over the concentration ranges of 5-100 µg/ml and 10-200 µg/ml respectively. For Dapagliflozin propanediol monohydrate and Teneligliptin hydrobromide hydrate, accuracy ranged from 99.81-100.78% and 99.13-100.69%, respectively. For Dapagliflozin propanediol monohydrate and Teneligliptin hydrobromide hydrate, the LOD was found to be 0.947 µg/ml and 1.355 µg/ml. In contrast, the LOQ was 2.869 µg/ml and 4.107 µg/ml, respectively. The findings demonstrated the applicability of the devised approach for routine analysis of Teneligliptin hydrobromide hydrate and Dapagliflozin propanediol monohydrate in a synthetic mixture form with its degradants.
{"title":"Stability Indicating RP-HPLC Method Development and Validation for Simultaneous Estimation of Dapagliflozin Propanediol Monohydrate and Teneligliptin Hydrobromide Hydrate in Synthetic Mixture","authors":"Dobarıya HITEKSHA, Urvi CHOTALİYA","doi":"10.18596/jotcsa.1288000","DOIUrl":"https://doi.org/10.18596/jotcsa.1288000","url":null,"abstract":"For the quantitative measurement of Dapagliflozin propanediol monohydrate and Teneligliptin hydrobromide hydrate in synthetic mixture form in the presence of its degradants, precise, accurate, robust, cost-effective, and isocratic stability indicating RP-HPLC method was developed and validated. The mobile phase comprises [Methanol: 20 mM Ammonium formate (70:30 v/v)] at a flow rate of 1.0 ml/min, injection volume of 20 µl, and UV detection at 225 nm. Separation was accomplished using Gemini, C18 column. Teneligliptin hydrobromide hydrate and Dapagliflozin propanediol monohydrate were eluted with retention times of 6.65 minutes and 4.20 minutes, respectively. This procedure was approved following ICH guideline Q2 (R1). The calibration plots for Dapagliflozin propanediol monohydrate and Teneligliptin hydrobromide hydrate have correlation coefficients of 0.9995 and 0.9996 over the concentration ranges of 5-100 µg/ml and 10-200 µg/ml respectively. For Dapagliflozin propanediol monohydrate and Teneligliptin hydrobromide hydrate, accuracy ranged from 99.81-100.78% and 99.13-100.69%, respectively. For Dapagliflozin propanediol monohydrate and Teneligliptin hydrobromide hydrate, the LOD was found to be 0.947 µg/ml and 1.355 µg/ml. In contrast, the LOQ was 2.869 µg/ml and 4.107 µg/ml, respectively. The findings demonstrated the applicability of the devised approach for routine analysis of Teneligliptin hydrobromide hydrate and Dapagliflozin propanediol monohydrate in a synthetic mixture form with its degradants.","PeriodicalId":17402,"journal":{"name":"Journal of the Turkish Chemical Society, Section A: Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136337758","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}
This research includes the synthesis and characterization of twelve new complexes of mono nuclear xanthate for a number of transition metal ions Ni(II), Cu(II), and Zn(II) and through the interaction with ligand (potassium decyl xanthate) and complexes of formula [M(DEXANT)2] were prepared: M= Ni(II), Cu(II), and Zn(II), and then the interaction of these complexes with Lewis bidentate bases, to give complexes with the formula [M(DEXANT)2.L], where L= 1,10-phenanthroline, 8-hydroxyquinoline, and 2,2-bipyridine. The prepared complexes were characterized by melting point, atomic absorption spectrometry, micro elemental analysis, infrared spectroscopy, proton nuclear magnetic resonance spectroscopy, molar electrical conductivity, electronic absorption spectra, and magnetic susceptibility measurements. Magnetic moment and electronic spectra indicated that the complexes of type [M(DEXANT)2] had a tetrahedral geometry, while complexes of type [M(DEXANT)2.L] had an octahedral geometry. The conductivity measurements proved the non-electrolytic behavior of all compounds. The biological evaluation against bacterial species indicated that the xanthate complexes were effective against all bacterial types.
{"title":"Preparation and Characterization of Some Complexes of Nickel(II), Copper (II), and Zinc (II) With Decylxanthate and their Adducts with Nitrogen Base Ligands, and their Biological Activity","authors":"Mahameed AMEEN, Fadia AHMED","doi":"10.18596/jotcsa.1311891","DOIUrl":"https://doi.org/10.18596/jotcsa.1311891","url":null,"abstract":"This research includes the synthesis and characterization of twelve new complexes of mono nuclear xanthate for a number of transition metal ions Ni(II), Cu(II), and Zn(II) and through the interaction with ligand (potassium decyl xanthate) and complexes of formula [M(DEXANT)2] were prepared: M= Ni(II), Cu(II), and Zn(II), and then the interaction of these complexes with Lewis bidentate bases, to give complexes with the formula [M(DEXANT)2.L], where L= 1,10-phenanthroline, 8-hydroxyquinoline, and 2,2-bipyridine. The prepared complexes were characterized by melting point, atomic absorption spectrometry, micro elemental analysis, infrared spectroscopy, proton nuclear magnetic resonance spectroscopy, molar electrical conductivity, electronic absorption spectra, and magnetic susceptibility measurements. Magnetic moment and electronic spectra indicated that the complexes of type [M(DEXANT)2] had a tetrahedral geometry, while complexes of type [M(DEXANT)2.L] had an octahedral geometry. The conductivity measurements proved the non-electrolytic behavior of all compounds. The biological evaluation against bacterial species indicated that the xanthate complexes were effective against all bacterial types.","PeriodicalId":17402,"journal":{"name":"Journal of the Turkish Chemical Society, Section A: Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135309102","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}
In modern biology and medicine, much attention is paid to the study of the hemostasis regulation of some cell populations by substances of a peptide nature. They have the ability to regulate the functional and proliferative activity of cells and ensure communication in normal and pathological conditions. Research data showed that significant violations of the hemostatic system also occur with radiation damage to the body. One of the first radiation responses involves the coagulation cascade's activation, which leads to the breakdown of fibrinogen and the formation of fibrin clots. The potential threat of this is quite evident due to the existence of uranium mining tailings in several regions of the Kyrgyz Republic. Considering that significant disturbances of the hemostatic system occur during radiation damage to the body, and effective means are clearly not enough, the study of the effect of bioregulatory peptides in these conditions is of great importance. In the study, we carried out the total X-ray irradiation of laboratory animals on the X-ray therapeutic apparatus RUM-17. Peptide bioregulators peptide-1 and peptide-2 were administered intramuscularly to irradiated animals. Throughout the research, we used methods characterizing all links of hemostasis: vascular-platelet hemostasis, coagulation hemostasis, and fibrinolysis. The study has shown that the use of the peptide bioregulators in the background of acute radiation pathology leads to a decrease in the intensity of the chronic course of post-radiation thrombo hemorrhagic syndrome, contributing to an increase in the content of antithrombin III in the blood and modulating the versatile effects of endogenous heparin, which undoubtedly have a beneficial effect on the pathogenesis of radiation sickness.
{"title":"Influence of Peptide Bioregulators on Indicators of Hemostasis in Blood of Irradiated Experimental Animals at Low Altitude Conditions","authors":"Gülbübü KURMANBEKOVA, Salkyn BEİSHENALİEVA, Nurjamal OMURZAKOVA, Bermet KIDIRALIYEVA","doi":"10.18596/jotcsa.1141531","DOIUrl":"https://doi.org/10.18596/jotcsa.1141531","url":null,"abstract":"In modern biology and medicine, much attention is paid to the study of the hemostasis regulation of some cell populations by substances of a peptide nature. They have the ability to regulate the functional and proliferative activity of cells and ensure communication in normal and pathological conditions. Research data showed that significant violations of the hemostatic system also occur with radiation damage to the body. One of the first radiation responses involves the coagulation cascade's activation, which leads to the breakdown of fibrinogen and the formation of fibrin clots. The potential threat of this is quite evident due to the existence of uranium mining tailings in several regions of the Kyrgyz Republic. Considering that significant disturbances of the hemostatic system occur during radiation damage to the body, and effective means are clearly not enough, the study of the effect of bioregulatory peptides in these conditions is of great importance. In the study, we carried out the total X-ray irradiation of laboratory animals on the X-ray therapeutic apparatus RUM-17. Peptide bioregulators peptide-1 and peptide-2 were administered intramuscularly to irradiated animals. Throughout the research, we used methods characterizing all links of hemostasis: vascular-platelet hemostasis, coagulation hemostasis, and fibrinolysis. The study has shown that the use of the peptide bioregulators in the background of acute radiation pathology leads to a decrease in the intensity of the chronic course of post-radiation thrombo hemorrhagic syndrome, contributing to an increase in the content of antithrombin III in the blood and modulating the versatile effects of endogenous heparin, which undoubtedly have a beneficial effect on the pathogenesis of radiation sickness.","PeriodicalId":17402,"journal":{"name":"Journal of the Turkish Chemical Society, Section A: Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135596402","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}
Monsuru DAUDA, Ayobami AJANİ, Tınuade Jolaade AFOLABI, Abass ALADE
Recycling polymeric waste into another useful material is considered to be the preferred way of taking care of the issues of slow degradable plastic waste, particularly in anticipation of natural contamination. In this study, the adsorptive treatment of Methylene Blue (MB) using adsorbents from chemically recycled polymeric waste was investigated. Three polymeric materials were employed in this study: styrofoam waste (EPS1), intruded extended polystyrene (EPS2), and sunflower xylem (Tithonia diversifolia xylem) (TDX). The alterations in microscopic surface morphology before and after the adsorption process were examined using scanning electron microscopy (SEM) system to resolve the intercalation of MB with the adsorbent. The experimental batch data was collected and the effects of concentration and contact time on the removal of MB from synthetic wastewater were studied. Adsorption kinetics, equilibrium, and thermodynamics were studied and fitted by various models. According to the result, the uptake of adsorbate increased as contact time and concentration rose, with the pseudo-second-order model best depicting the adsorption kinetics.
{"title":"Investigation of Adsorptive Removal of Methylene Blue from Synthetic Wastewater Using Polymeric Composite","authors":"Monsuru DAUDA, Ayobami AJANİ, Tınuade Jolaade AFOLABI, Abass ALADE","doi":"10.18596/jotcsa.1148910","DOIUrl":"https://doi.org/10.18596/jotcsa.1148910","url":null,"abstract":"Recycling polymeric waste into another useful material is considered to be the preferred way of taking care of the issues of slow degradable plastic waste, particularly in anticipation of natural contamination. In this study, the adsorptive treatment of Methylene Blue (MB) using adsorbents from chemically recycled polymeric waste was investigated. Three polymeric materials were employed in this study: styrofoam waste (EPS1), intruded extended polystyrene (EPS2), and sunflower xylem (Tithonia diversifolia xylem) (TDX). The alterations in microscopic surface morphology before and after the adsorption process were examined using scanning electron microscopy (SEM) system to resolve the intercalation of MB with the adsorbent. The experimental batch data was collected and the effects of concentration and contact time on the removal of MB from synthetic wastewater were studied. Adsorption kinetics, equilibrium, and thermodynamics were studied and fitted by various models. According to the result, the uptake of adsorbate increased as contact time and concentration rose, with the pseudo-second-order model best depicting the adsorption kinetics.","PeriodicalId":17402,"journal":{"name":"Journal of the Turkish Chemical Society, Section A: Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136383348","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}
Over this study we calculated the coefficients of activity of different species and the concentration in the presence of H+ ion when H2SO4 is alone in solution. The coefficient of average activity was calculated using the model of Pitzer. The constants of dissociation of these reactions were calculated from the values of the free standard energies. The reaction reaches a balance while producing H+, HSO4- and SO42-. The research reported here concentrated on the effect of some important operational parameters on dissolution process. The parameters were investigated and their ranges are as follows: initial molality ranging from 0.001 to 5 mol.kg-1 and temperatures between 25 and 200°C. Fortran 90 (Mathematical formula translating system) was used to perform all mathematical calculations. The numerical code can be used to calculate the molarity of ion H+ of an aqueous solution of sulfuric acid. The objective of the present work is to optimize the parameters of leaching such as activity of sulfuric acid on the dissociation phenomena.
{"title":"Use of Pitzer’s model to calculate thermodynamic properties of aqueous electrolyte solutions of sulfuric acid","authors":"Abdelhakim BEGAR, Cherif SAİB, Mohamed-saïd CHEBBAH","doi":"10.18596/jotcsa.1118833","DOIUrl":"https://doi.org/10.18596/jotcsa.1118833","url":null,"abstract":"Over this study we calculated the coefficients of activity of different species and the concentration in the presence of H+ ion when H2SO4 is alone in solution. The coefficient of average activity was calculated using the model of Pitzer. The constants of dissociation of these reactions were calculated from the values of the free standard energies. The reaction reaches a balance while producing H+, HSO4- and SO42-. The research reported here concentrated on the effect of some important operational parameters on dissolution process. The parameters were investigated and their ranges are as follows: initial molality ranging from 0.001 to 5 mol.kg-1 and temperatures between 25 and 200°C. Fortran 90 (Mathematical formula translating system) was used to perform all mathematical calculations. The numerical code can be used to calculate the molarity of ion H+ of an aqueous solution of sulfuric acid. The objective of the present work is to optimize the parameters of leaching such as activity of sulfuric acid on the dissociation phenomena.","PeriodicalId":17402,"journal":{"name":"Journal of the Turkish Chemical Society, Section A: Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135250419","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}
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