Pub Date : 2023-01-01DOI: 10.31788/rjc.2023.1617061
H. Sutanto, I. Alkian, Ulfa Hasanah, E. Hidayanto, I. Marhaendrajaya, Priyono
Waste dyes are a major source of water pollution, which is a critical environmental issue. The purpose of this study is to synthesize double-layer ZnO: Fe 5-20% thin films and investigate the degradation of rhodamine B in these films. The creation of the ZnO phase with the wurtzite hexagonal structure may be seen in the thin film X-ray diffraction pattern. Only marginally lessened energy bandgap (3.11-3.09 eV), optical transmission spectra, and lattice strain was seen after Fe was added to ZnO thin films. With increasing Fe concentration, it was found that the hydrophilicity and photocatalytic characteristics of ZnO thin films considerably decreased, as shown by the contact angle going from 51.4 to 70.71 and the decomposition efficiency going from 61.46% to 50.35%. The double-layer ZnO layer's optical characteristics diminish as the Fe concentration rises.
{"title":"PHOTOCATALYTIC DEGRADATION OF RHODAMINE B UNDER UV USING DOUBLE-LAYER ZnO: Fe THIN FILM","authors":"H. Sutanto, I. Alkian, Ulfa Hasanah, E. Hidayanto, I. Marhaendrajaya, Priyono","doi":"10.31788/rjc.2023.1617061","DOIUrl":"https://doi.org/10.31788/rjc.2023.1617061","url":null,"abstract":"Waste dyes are a major source of water pollution, which is a critical environmental issue. The purpose of this study is to synthesize double-layer ZnO: Fe 5-20% thin films and investigate the degradation of rhodamine B in these films. The creation of the ZnO phase with the wurtzite hexagonal structure may be seen in the thin film X-ray diffraction pattern. Only marginally lessened energy bandgap (3.11-3.09 eV), optical transmission spectra, and lattice strain was seen after Fe was added to ZnO thin films. With increasing Fe concentration, it was found that the hydrophilicity and photocatalytic characteristics of ZnO thin films considerably decreased, as shown by the contact angle going from 51.4 to 70.71 and the decomposition efficiency going from 61.46% to 50.35%. The double-layer ZnO layer's optical characteristics diminish as the Fe concentration rises.","PeriodicalId":21063,"journal":{"name":"Rasayan Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69409791","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}
Pub Date : 2023-01-01DOI: 10.31788/rjc.2023.1618000
K. Fitri, M. Andry, T. N. Khairani, H. S. Winata, A. Violenta, N. Lubis, M. F. Lubis
The cytotoxic activitiy of silver nanoparticles bio-functionalized by Nelumbo nucifera leaf extracts were examined in the current work. The nanoparticle (AgNPs) was characterized by scanning electron microscopy, UV–visible spectroscopy, and a particle size analyzer. Cytotoxic activity of silver nanoparticles against T47D and 4T1 cells using the MTT method using concentrations of 100 µg/mL, 50 µg/mL, and 25 µg/mL. For comparison, doxorubicin was used at the same dose. The size of the spherical nanoparticle was 66.4±0.93 nm and the polydispersity index was 0.23±0.05. Silver nanoparticles have anti-cancer properties against T47D and 4T1 cell lines based on inhibitory concentration. The inhibitory concentration (IC50) of AgNPs on T47D and 4T1 cells were obtained at 12.10±0.08 𝜇g/mL and 98.77±1.27 𝜇g/mL, respectively. Meanwhile, the IC50 values of doxorubicin in T47D and 4T1 cells were 4.45±0.03 𝜇g/mL and 36.77±1.15 𝜇g/mL, respectively. Overall, the results revealed that the green-synthetized silver nanoparticle had cytotoxic effects on breast cancer cells in comparison to doxorubicin.
{"title":"SYNTHESIS OF SILVER NANOPARTICLES USING ETHANOLIC EXTRACT OF Nelumbo nucifera Gaertn. LEAF AND ITS CYTOTOXIC ACTIVITY AGAINST T47D AND 4T1 CELL LINES","authors":"K. Fitri, M. Andry, T. N. Khairani, H. S. Winata, A. Violenta, N. Lubis, M. F. Lubis","doi":"10.31788/rjc.2023.1618000","DOIUrl":"https://doi.org/10.31788/rjc.2023.1618000","url":null,"abstract":"The cytotoxic activitiy of silver nanoparticles bio-functionalized by Nelumbo nucifera leaf extracts were examined in the current work. The nanoparticle (AgNPs) was characterized by scanning electron microscopy, UV–visible spectroscopy, and a particle size analyzer. Cytotoxic activity of silver nanoparticles against T47D and 4T1 cells using the MTT method using concentrations of 100 µg/mL, 50 µg/mL, and 25 µg/mL. For comparison, doxorubicin was used at the same dose. The size of the spherical nanoparticle was 66.4±0.93 nm and the polydispersity index was 0.23±0.05. Silver nanoparticles have anti-cancer properties against T47D and 4T1 cell lines based on inhibitory concentration. The inhibitory concentration (IC50) of AgNPs on T47D and 4T1 cells were obtained at 12.10±0.08 𝜇g/mL and 98.77±1.27 𝜇g/mL, respectively. Meanwhile, the IC50 values of doxorubicin in T47D and 4T1 cells were 4.45±0.03 𝜇g/mL and 36.77±1.15 𝜇g/mL, respectively. Overall, the results revealed that the green-synthetized silver nanoparticle had cytotoxic effects on breast cancer cells in comparison to doxorubicin.","PeriodicalId":21063,"journal":{"name":"Rasayan Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69409800","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}
Pub Date : 2023-01-01DOI: 10.31788/rjc.2023.1616846
Bhuvan Uthaiah Muruvanda, Akash Shanmugasundaram Prakash, K. Kalapriya, K. Sampath
Green chemistry, an emerging field of science, focuses on the prevention of waste and the use of hazardous substances. It also emphasizes the elimination or reduction of the use of harmful elements in various stages of the manufacturing process or a product development setting. The unpredictable climatic changes and the environmental hazards produced by the industries made the researcher’s attention in this arena. At present, industries make an effort to produce their products greener. As a consequence, several biotechnological and biological applications join hands with green chemistry, making the manufacturing process not only greener but also economical. Enzymes are the result of the combination of green chemistry and biotechnology. In the current scenario, there is a need for new versatile enzymes to develop sustainable and economically competitive production processes. The present article reviews the types of enzymes obtained from plants and microorganisms used in different industries and their vital role in the conservation of an eco-friendly environment.
{"title":"GREEN ENZYMES FROM PLANTS AND MICROBIAL SOURCES USED IN INDUSTRIES: AN OVERVIEW","authors":"Bhuvan Uthaiah Muruvanda, Akash Shanmugasundaram Prakash, K. Kalapriya, K. Sampath","doi":"10.31788/rjc.2023.1616846","DOIUrl":"https://doi.org/10.31788/rjc.2023.1616846","url":null,"abstract":"Green chemistry, an emerging field of science, focuses on the prevention of waste and the use of hazardous substances. It also emphasizes the elimination or reduction of the use of harmful elements in various stages of the manufacturing process or a product development setting. The unpredictable climatic changes and the environmental hazards produced by the industries made the researcher’s attention in this arena. At present, industries make an effort to produce their products greener. As a consequence, several biotechnological and biological applications join hands with green chemistry, making the manufacturing process not only greener but also economical. Enzymes are the result of the combination of green chemistry and biotechnology. In the current scenario, there is a need for new versatile enzymes to develop sustainable and economically competitive production processes. The present article reviews the types of enzymes obtained from plants and microorganisms used in different industries and their vital role in the conservation of an eco-friendly environment.","PeriodicalId":21063,"journal":{"name":"Rasayan Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69410179","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}
Pub Date : 2023-01-01DOI: 10.31788/rjc.2023.1618113
Suharni P. Sinaga, R. Situmorang, N. Singarimbun, W. Lestari, K. Gurning
Nangka (Artocarpus heterophyllus Lam.) has various nutritional contents and abundant bioactive compounds. Potential bioactive compounds including phenolic and flavonoid categorized as antioxidants. This study aimed to determine the levels of phenolics and flavonoids and to test their potential activity as antioxidants from the ethanol extract of nangka leaves. The extraction process used ethanol by maceration method, colorimetric determination of phenolic, flavonoid, and tannins content, and determination of antioxidant activity by 2,2-dipicryl -1-hydrazil (DPPH) method using UV-Vis spectrophotometry. Determination of phenolic content was measured at a maximum wavelength of 765 nm with gallic acid as the standard, flavonoid content was measured at a maximum wavelength of 431 nm with quercetin as standard, tannins content was measured at a maximum wavelength of 745 nm with tannic acid as standard and the determination of antioxidant activity at a maximum wavelength of 517 nm with positive control of vitamin C. The results showed that the ethanolic extract of nangka leaves has phenolic content with a total phenolic content of 27.654±0.054 mg GAE/g d.w ethanolic, flavonoid content of 2.978 ±0.192 mg QE/g d.w ethanolic, tannins content 0.46 ± 0.017 mg TAE/g d.w ethanolic extract and antioxidant activity (IC50) 25.561±0.055 ppm which categorized as a very strong antioxidant
{"title":"DETERMINATION OF TOTAL PHYTOCHEMICAL COMPOUNDS FROM ETHANOL EXTRACT NANGKA (Artocarpus heterophyllus Lam.) LEAVES AND ANTIOXIDANT ACTIVITY FROM NORTH SUMATERA, INDONESIA","authors":"Suharni P. Sinaga, R. Situmorang, N. Singarimbun, W. Lestari, K. Gurning","doi":"10.31788/rjc.2023.1618113","DOIUrl":"https://doi.org/10.31788/rjc.2023.1618113","url":null,"abstract":"Nangka (Artocarpus heterophyllus Lam.) has various nutritional contents and abundant bioactive compounds. Potential bioactive compounds including phenolic and flavonoid categorized as antioxidants. This study aimed to determine the levels of phenolics and flavonoids and to test their potential activity as antioxidants from the ethanol extract of nangka leaves. The extraction process used ethanol by maceration method, colorimetric determination of phenolic, flavonoid, and tannins content, and determination of antioxidant activity by 2,2-dipicryl -1-hydrazil (DPPH) method using UV-Vis spectrophotometry. Determination of phenolic content was measured at a maximum wavelength of 765 nm with gallic acid as the standard, flavonoid content was measured at a maximum wavelength of 431 nm with quercetin as standard, tannins content was measured at a maximum wavelength of 745 nm with tannic acid as standard and the determination of antioxidant activity at a maximum wavelength of 517 nm with positive control of vitamin C. The results showed that the ethanolic extract of nangka leaves has phenolic content with a total phenolic content of 27.654±0.054 mg GAE/g d.w ethanolic, flavonoid content of 2.978 ±0.192 mg QE/g d.w ethanolic, tannins content 0.46 ± 0.017 mg TAE/g d.w ethanolic extract and antioxidant activity (IC50) 25.561±0.055 ppm which categorized as a very strong antioxidant","PeriodicalId":21063,"journal":{"name":"Rasayan Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69410456","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}
Pub Date : 2023-01-01DOI: 10.31788/rjc.2023.1618078
J. Tarigan, D. Barus, G. Brahmana, D. A. Hulu, W.S. Sembiring, S. Perangin-angin, E. K. Sitepu
In the present research, a microwave-intensified esterification reaction of myristic acid and palmitic acid with isopropyl alcohol (IPA) to produce an emollient ester using Amberlyst46 as a catalyst was studied. The effect of the ratio of molar fatty acid to alcohol, catalyst weight, reaction time, and microwave power on isopropyl myristate (IPM) and isopropyl palmitate (IPP) conversion and yield were investigated systematically. The results showed that catalyst weight and microwave power significantly affect the conversion and yield of IPM and IPP, respectively. The maximum conversion and yield of IPM were achieved under microwave irradiation power of 100% and catalyst weight of 15 wt.% while only 50% microwave power was required to achieve maximum conversion and yield of IPP using 18 wt.% of catalyst weight. These findings show that microwave-facilitated esterification reaction is a promising alternative method to produce emollient ester as the maximum conversion could achieve in a short reaction time.
{"title":"MICROWAVE FACILITATED THE SYNTHESIS OF ISOPROPYL MYRISTATE AND PALMITATE USING HETEROGENEOUS CATALYST","authors":"J. Tarigan, D. Barus, G. Brahmana, D. A. Hulu, W.S. Sembiring, S. Perangin-angin, E. K. Sitepu","doi":"10.31788/rjc.2023.1618078","DOIUrl":"https://doi.org/10.31788/rjc.2023.1618078","url":null,"abstract":"In the present research, a microwave-intensified esterification reaction of myristic acid and palmitic acid with isopropyl alcohol (IPA) to produce an emollient ester using Amberlyst46 as a catalyst was studied. The effect of the ratio of molar fatty acid to alcohol, catalyst weight, reaction time, and microwave power on isopropyl myristate (IPM) and isopropyl palmitate (IPP) conversion and yield were investigated systematically. The results showed that catalyst weight and microwave power significantly affect the conversion and yield of IPM and IPP, respectively. The maximum conversion and yield of IPM were achieved under microwave irradiation power of 100% and catalyst weight of 15 wt.% while only 50% microwave power was required to achieve maximum conversion and yield of IPP using 18 wt.% of catalyst weight. These findings show that microwave-facilitated esterification reaction is a promising alternative method to produce emollient ester as the maximum conversion could achieve in a short reaction time.","PeriodicalId":21063,"journal":{"name":"Rasayan Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69410639","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}
Pub Date : 2023-01-01DOI: 10.31788/rjc.2023.1618170
Pandurang Choudhari, P. V. Raut
At 32°C, the apparent molal volume (v), apparent molal compressibility (k), relative association (RA), and solvation number (Sn) of substituted 2-oxo-2-H-chromene-3-carbohydrazide derivatives in 60% DMF-water were measured. The data is used to determine the interaction that is taking place in the solution. The ultrasonic technique is used to determine the interaction of a solute and a solvent. The variation of factors in binary mixtures with different concentrations indicates a significant interaction between solute and solvent molecules, associative molecular interaction, and ion-solvent interaction.
在32℃下，测定了取代的2-氧-2- h -铬-3-碳腙衍生物在60% dmf水中的表观摩尔体积(v)、表观摩尔压缩性(k)、相对结合度(RA)和溶剂化数(Sn)。数据用于确定解决方案中发生的交互。超声波技术用于测定溶质和溶剂的相互作用。不同浓度二元混合物中各因子的变化表明溶质分子与溶剂分子之间存在显著的相互作用、缔合分子相互作用和离子-溶剂相互作用。
{"title":"STUDY OF MOLECULAR INTERACTIONS OF SUBSTITUTED 2-OXO-2-H-CHROMENE-3-CARBOHYDRAZIDE DERIVATIVES IN BINARY SOLVENTS USING ULTRASONIC INTERFEROMETER","authors":"Pandurang Choudhari, P. V. Raut","doi":"10.31788/rjc.2023.1618170","DOIUrl":"https://doi.org/10.31788/rjc.2023.1618170","url":null,"abstract":"At 32°C, the apparent molal volume (v), apparent molal compressibility (k), relative association (RA), and solvation number (Sn) of substituted 2-oxo-2-H-chromene-3-carbohydrazide derivatives in 60% DMF-water were measured. The data is used to determine the interaction that is taking place in the solution. The ultrasonic technique is used to determine the interaction of a solute and a solvent. The variation of factors in binary mixtures with different concentrations indicates a significant interaction between solute and solvent molecules, associative molecular interaction, and ion-solvent interaction.","PeriodicalId":21063,"journal":{"name":"Rasayan Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69411016","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}
Pub Date : 2023-01-01DOI: 10.31788/rjc.2023.1628154
Palla Sai Lakshmi, P. Shankaraiah
A novel analog of substituted-(E)-2-benzylidene-N-(3-(3-oxo-2,3-dihydro-4H-benzo[b] [1,4] oxazin-4-yl)propyl) hydrazine-1-carbothioamides (9a-j) appeared to be assess being anti-proliferative activity in vitro environment some of the newly derived derivatives have shown sufficiently great to modest suppression in the number of cells in cancer among GrowthInhibition50 was (0.180-4.20 µM). Compounds 9a, 9b, 9d, 9g, 9i, and 9j showed promising acts contrarily 4 human being tumor cell lines. Out of 9a and 9g displayed heartening cancer act in opposition to IMR-32 (Human being neuroblastoma cells) at 0.23 M and MIAPACA(human pancreatic carcinoma cells) at 0.18 M respectively. Notably, compound 9g showed significant activity at 0.18 M against the MIAPACA cell line respectively.
{"title":"IN VITRO ANTI-PROLIFERATIVE ACTIVITY OF NOVEL ANALOGUES OF(E)-2-BENZYLIDENE-N-(3-(3-OXO-2,3- DIHYDRO-4H-BENZO[B][1,4]OXAZIN-4-YL)PROPYL) HYDRAZINE-1-CARBOTHIOAMIDE","authors":"Palla Sai Lakshmi, P. Shankaraiah","doi":"10.31788/rjc.2023.1628154","DOIUrl":"https://doi.org/10.31788/rjc.2023.1628154","url":null,"abstract":"A novel analog of substituted-(E)-2-benzylidene-N-(3-(3-oxo-2,3-dihydro-4H-benzo[b] [1,4] oxazin-4-yl)propyl) hydrazine-1-carbothioamides (9a-j) appeared to be assess being anti-proliferative activity in vitro environment some of the newly derived derivatives have shown sufficiently great to modest suppression in the number of cells in cancer among GrowthInhibition50 was (0.180-4.20 µM). Compounds 9a, 9b, 9d, 9g, 9i, and 9j showed promising acts contrarily 4 human being tumor cell lines. Out of 9a and 9g displayed heartening cancer act in opposition to IMR-32 (Human being neuroblastoma cells) at 0.23 M and MIAPACA(human pancreatic carcinoma cells) at 0.18 M respectively. Notably, compound 9g showed significant activity at 0.18 M against the MIAPACA cell line respectively.","PeriodicalId":21063,"journal":{"name":"Rasayan Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69411039","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}
Pub Date : 2023-01-01DOI: 10.31788/rjc.2023.1628290
A.K. Alkhawaldeh, A. Al-Dhuraibi
Electrochemical reduction of the CO2 present in 0.1 M Ethanolamine (EA) aqueous solution at Palladium metal electrodes for the synthesis of ethyl carbamate (CH3CH2OC(O)NH2) is investigated. The application square wave potential regime of the carbon dioxide in (EA) to be reduced to an organic product. In addition to identifying optimal conditions for CO2 electrocatalysis reduction by the square wave potential regime, the potential value was between - 1.0 to 0.4 V with 1.4 V amplitude, the time of reaction was 4 hours and the frequency was 100 Hz. We have carried out reactions at various pH levels and different voltages in an alkaline environment to ensure optimal conditions for the production of ethyl carbamate. The palladium catalysts electrode has demonstrated high CO2 electro-reduction activity to the organic compound. The organic product was analyzed by cyclic voltammetry, NMR, UV spectrometry, FT-IR spectroscopy, TGA, and MS. The results suggest the reduction of CO2-saturated in 0.1 M ethanolamine to ethyl carbamate, C2H5OCONH2. The Faradaic Efficiency and current density of electro-convert CO2-saturated in ethanolamine to ethyl carbamate are 93% and 71 mA cm−2, respectively
{"title":"APPLICATION OF SQUARE WAVE POTENTIAL REGIME TO ELECTRO REDUCTION OF CO2 IN ETHANOLAMINE INTO ETHYL CARBAMATE BY PALLADIUM ELECTRODE","authors":"A.K. Alkhawaldeh, A. Al-Dhuraibi","doi":"10.31788/rjc.2023.1628290","DOIUrl":"https://doi.org/10.31788/rjc.2023.1628290","url":null,"abstract":"Electrochemical reduction of the CO2 present in 0.1 M Ethanolamine (EA) aqueous solution at Palladium metal electrodes for the synthesis of ethyl carbamate (CH3CH2OC(O)NH2) is investigated. The application square wave potential regime of the carbon dioxide in (EA) to be reduced to an organic product. In addition to identifying optimal conditions for CO2 electrocatalysis reduction by the square wave potential regime, the potential value was between - 1.0 to 0.4 V with 1.4 V amplitude, the time of reaction was 4 hours and the frequency was 100 Hz. We have carried out reactions at various pH levels and different voltages in an alkaline environment to ensure optimal conditions for the production of ethyl carbamate. The palladium catalysts electrode has demonstrated high CO2 electro-reduction activity to the organic compound. The organic product was analyzed by cyclic voltammetry, NMR, UV spectrometry, FT-IR spectroscopy, TGA, and MS. The results suggest the reduction of CO2-saturated in 0.1 M ethanolamine to ethyl carbamate, C2H5OCONH2. The Faradaic Efficiency and current density of electro-convert CO2-saturated in ethanolamine to ethyl carbamate are 93% and 71 mA cm−2, respectively","PeriodicalId":21063,"journal":{"name":"Rasayan Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69411240","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}
Pub Date : 2023-01-01DOI: 10.31788/rjc.2023.1628208
Monika, G. Rani, Naveen Kumar, R. Ahlawat
Advanced corrosion protection methods include covering stainless steel surfaces with conductive polymer-based coatings. Polypyrrole and polypyrrole composites of tungstate of different concentrations were deposited on stainless steel-304 using cyclic voltammetry and their elemental analysis was verified by EDX analysis. EIS and potentiodynamic polarization analysis show that the corrosion protection efficiency (CPE) of polypyrrole composites is higher than polypyrrole coating. The reduction in corrosion rate due to the inhibitory action of tungstate through the physical barrier and anodic protection mechanism was validated by greater Rct and lower Icorr values of polypyrrole composites. In the composites, with increasing the concentration of tungstate in polypyrrole from 5% to 15%, CPE also increases, as polypyrrole composites are more able to shift the corrosion potential of stainless steels towards the passive zone and form a new nonporous passive oxide film on the surface. With a 15% concentration coating, the highest CPE of 93% and the lowest corrosion rate of 130 mmpy were obtained, indicating that the entire stainless steel active surface area is completely absorbed and that no active sites exit for adsorption at this concentration. The synthesized polypyrrole composites with a 15% concentration offer excellent corrosion protection prospects.
{"title":"EVALUATION OF CORROSION PROTECTION CAPACITY OF DOPED PPY FILM FOR STAINLESS STEEL IN AN ACIDIC MEDIUM","authors":"Monika, G. Rani, Naveen Kumar, R. Ahlawat","doi":"10.31788/rjc.2023.1628208","DOIUrl":"https://doi.org/10.31788/rjc.2023.1628208","url":null,"abstract":"Advanced corrosion protection methods include covering stainless steel surfaces with conductive polymer-based coatings. Polypyrrole and polypyrrole composites of tungstate of different concentrations were deposited on stainless steel-304 using cyclic voltammetry and their elemental analysis was verified by EDX analysis. EIS and potentiodynamic polarization analysis show that the corrosion protection efficiency (CPE) of polypyrrole composites is higher than polypyrrole coating. The reduction in corrosion rate due to the inhibitory action of tungstate through the physical barrier and anodic protection mechanism was validated by greater Rct and lower Icorr values of polypyrrole composites. In the composites, with increasing the concentration of tungstate in polypyrrole from 5% to 15%, CPE also increases, as polypyrrole composites are more able to shift the corrosion potential of stainless steels towards the passive zone and form a new nonporous passive oxide film on the surface. With a 15% concentration coating, the highest CPE of 93% and the lowest corrosion rate of 130 mmpy were obtained, indicating that the entire stainless steel active surface area is completely absorbed and that no active sites exit for adsorption at this concentration. The synthesized polypyrrole composites with a 15% concentration offer excellent corrosion protection prospects.","PeriodicalId":21063,"journal":{"name":"Rasayan Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69411322","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}
Pub Date : 2023-01-01DOI: 10.31788/rjc.2023.1628212
J. Panchal, B. Dhaduk, J. Dhalani
Remogliflozin and Vildagliptin are the latest drug combination in order to treat type 2 diabetes. The present work describes a comparative study of 2nd-ordered derivative UV and isocratic stability indicating RP-HPLC methods for simultaneous determination of Remogliflozin and Vildagliptin in the drug and its formulation. The HPLC method was established with a C18 column and the mobile phase with Buffer (pH-6.50): Acetonitrile: Methanol ratio of 55:44:1, at 1.2 ml/min flow and wavelength of 210 nm. The UV spectrophotometric method works on spectrophotometry with 2nd order derivative spectra(2D) using a zero-line cross method. The absorbance determination was performed at 246.0 nm for REM and at 219 .6 nm for VIL. The methods were validated for Linearity, Precision, Recovery, Robustness, and Forced degradation as per ICH-Q2(R1). The linear range was established in the range of 4-80 ppm for REM and 2-40 ppm for VIL for the UV method and 2-200 ppm for REM and 1-100 ppm for VIL for the HPLC method with regression coefficient ≥0.990. The accuracy was 99.37% & 99.62% for UV and 100.98 & 100.65 for the HPLC method for REM and VIL respectively. The proposed methods have been effectively used for the quantification of REM and VIL in API mixture and formulation dosage forms. Both methods are economical, fast, simple, and accurate which can be easily adopted for laboratory use.
{"title":"STABILITY INDICATING ISOCRATIC RP-HPLC AND SECOND DERIVATIVE UV SPECTROSCOPIC METHODS FOR SIMULTANEOUS DETERMINATION OF REMOGLIFLOZIN ETABONATE AND VILDAGLIPTIN HYDROCHLORIDE","authors":"J. Panchal, B. Dhaduk, J. Dhalani","doi":"10.31788/rjc.2023.1628212","DOIUrl":"https://doi.org/10.31788/rjc.2023.1628212","url":null,"abstract":"Remogliflozin and Vildagliptin are the latest drug combination in order to treat type 2 diabetes. The present work describes a comparative study of 2nd-ordered derivative UV and isocratic stability indicating RP-HPLC methods for simultaneous determination of Remogliflozin and Vildagliptin in the drug and its formulation. The HPLC method was established with a C18 column and the mobile phase with Buffer (pH-6.50): Acetonitrile: Methanol ratio of 55:44:1, at 1.2 ml/min flow and wavelength of 210 nm. The UV spectrophotometric method works on spectrophotometry with 2nd order derivative spectra(2D) using a zero-line cross method. The absorbance determination was performed at 246.0 nm for REM and at 219 .6 nm for VIL. The methods were validated for Linearity, Precision, Recovery, Robustness, and Forced degradation as per ICH-Q2(R1). The linear range was established in the range of 4-80 ppm for REM and 2-40 ppm for VIL for the UV method and 2-200 ppm for REM and 1-100 ppm for VIL for the HPLC method with regression coefficient ≥0.990. The accuracy was 99.37% & 99.62% for UV and 100.98 & 100.65 for the HPLC method for REM and VIL respectively. The proposed methods have been effectively used for the quantification of REM and VIL in API mixture and formulation dosage forms. Both methods are economical, fast, simple, and accurate which can be easily adopted for laboratory use.","PeriodicalId":21063,"journal":{"name":"Rasayan Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69411330","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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