Pub Date : 2020-08-21DOI: 10.30799/jacs.223.20060201
Shatarupa Basak, Salim Ali, D. Das, Suranjan Sikdar, M. Roy
The Al2MoZnO7 (AMZ) nanocomposite had been successfully synthesized via co-precipitation method followed by a low temperature calcinations treatment process. It had been found that such an Al2MoZnO7 nanocomposites exhibits higher photocatalytic activity and stability than pure ZnO towards the aqueous phase degradation of acid orange II dye under visible light (400 nm
{"title":"Synthesis, Characterization and Visible Light Induced Photo-Degradation of Acid Orange II Dye in Aqueous Medium using a Novel Synthesized Al2MoZnO7 Nanocomposite","authors":"Shatarupa Basak, Salim Ali, D. Das, Suranjan Sikdar, M. Roy","doi":"10.30799/jacs.223.20060201","DOIUrl":"https://doi.org/10.30799/jacs.223.20060201","url":null,"abstract":"The Al2MoZnO7 (AMZ) nanocomposite had been successfully synthesized via co-precipitation method followed by a low temperature calcinations treatment process. It had been found that such an Al2MoZnO7 nanocomposites exhibits higher photocatalytic activity and stability than pure ZnO towards the aqueous phase degradation of acid orange II dye under visible light (400 nm","PeriodicalId":14902,"journal":{"name":"Journal of Advanced Chemical Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81684486","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 : 2020-05-26DOI: 10.30799/jacs.221.20060104
Nagaraja Sannakki, Bharati Basavaraj, B. Sannakki
Green synthesis of multifunctional magnesium oxide nanoparticles (NPs) were prepared by low temperature solution combustion route employing Aloe vera leaves extract as a fuel. The Aloe vera leaf extracts acts as a fuel in the preparation of MgO nanoparticles. The obtained MgO NPs were further characterized by various techniques such as PXRD, SEM, TEM and UV-visible spectroscopic studies. The surface morphologies of the prepared samples were studied with the help of scanning electron microscopy (SEM). The PXRD pattern confirmed the cubic (halite) structure of the product. The particle size was calculated by means of PXRD profile and it was found to be in the range of 20-25 nm by using the Debye-Scherrer relation. SEM images indicated the formation of various shaped MgO NPs. The NPs exhibited prominent green emission due to the presence of intrinsic defect centers. Also, the results found that the optical band gap is 4.46 eV.
{"title":"Green Fabrication of MgO Nanostructure for Morphology and Optical Studies","authors":"Nagaraja Sannakki, Bharati Basavaraj, B. Sannakki","doi":"10.30799/jacs.221.20060104","DOIUrl":"https://doi.org/10.30799/jacs.221.20060104","url":null,"abstract":"Green synthesis of multifunctional magnesium oxide nanoparticles (NPs) were prepared by low temperature solution combustion route employing Aloe vera leaves extract as a fuel. The Aloe vera leaf extracts acts as a fuel in the preparation of MgO nanoparticles. The obtained MgO NPs were further characterized by various techniques such as PXRD, SEM, TEM and UV-visible spectroscopic studies. The surface morphologies of the prepared samples were studied with the help of scanning electron microscopy (SEM). The PXRD pattern confirmed the cubic (halite) structure of the product. The particle size was calculated by means of PXRD profile and it was found to be in the range of 20-25 nm by using the Debye-Scherrer relation. SEM images indicated the formation of various shaped MgO NPs. The NPs exhibited prominent green emission due to the presence of intrinsic defect centers. Also, the results found that the optical band gap is 4.46 eV.","PeriodicalId":14902,"journal":{"name":"Journal of Advanced Chemical Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82656068","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 : 2020-05-19DOI: 10.30799/jacs.217.20060102
Samapika Ray, H. Rahaman, Kanak Roy, M. Roy
The solute-cosolute interaction of uracil by gallic acid has been studied through physicochemical investigation in aqueous environment. Here, we have carried out the density (ρ) and viscosity (η) measurements of uracil in w1= 0.001, 0.002 and 0.003 mass fraction of aqueous gallic acid binary mixtures at T= 298.15 K, 303.15 K and 308.15 K at pressure 1.013 bar. Some important parameters have been derived from the above physicochemical method, namely, limiting apparent molar volume (φV0) and viscosity B-coefficients using extended Masson equation and Jones-Dole equation respectively. The refractive index (nD) has been done on the same system at T=298.15 K. Lorentz-Lorenz equation has used to evaluate molar refractive index (RM) and limiting molar index (RM0). The NMR study used to measure the plausible selective site of solute-cosolute interaction.
{"title":"Assorted Interactions Prevalent in Uracil and Aqueous Gallic Acid Solution Explored by Physicochemical Contrivance","authors":"Samapika Ray, H. Rahaman, Kanak Roy, M. Roy","doi":"10.30799/jacs.217.20060102","DOIUrl":"https://doi.org/10.30799/jacs.217.20060102","url":null,"abstract":"The solute-cosolute interaction of uracil by gallic acid has been studied through physicochemical investigation in aqueous environment. Here, we have carried out the density (ρ) and viscosity (η) measurements of uracil in w1= 0.001, 0.002 and 0.003 mass fraction of aqueous gallic acid binary mixtures at T= 298.15 K, 303.15 K and 308.15 K at pressure 1.013 bar. Some important parameters have been derived from the above physicochemical method, namely, limiting apparent molar volume (φV0) and viscosity B-coefficients using extended Masson equation and Jones-Dole equation respectively. The refractive index (nD) has been done on the same system at T=298.15 K. Lorentz-Lorenz equation has used to evaluate molar refractive index (RM) and limiting molar index (RM0). The NMR study used to measure the plausible selective site of solute-cosolute interaction.","PeriodicalId":14902,"journal":{"name":"Journal of Advanced Chemical Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75784733","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 : 2020-05-19DOI: 10.30799/jacs.222.20060103
Y. Sahoo, Omprakash Sahoo
Flexible and semitransparent hole transport layers in perovskite-based photovoltaics have been attracting increasing attention in recent years. Among the benefits they provide, such as being easily reproducible and affordable, they pose their own problems with device degradation, stability, and surface wettability. We probed the graphene oxide doped PEDOT:PSS (GO)/poly(3,4 ethylenedioxythiophene):poly(styrene sulfonate) composite for the application in 2D carbonaceous hole transport layers to improve perovskite solar cells. Advantages and problems are pointed out as well as new perspectives to further modify and retract the drawbacks of conducting polymers. We discussed the advancement of the hole transport layer and described the effects of graphene oxide (dopant) on device transmission, surface wettability, and film quality. Basic principles and mechanisms are covered in the development of polymeric hole transport layers and interfacial properties. Findings included the decrease in device transmission, lessened oxidation of the perovskite, and superior surface wettability. This work highlights the importance and relevance of thin, flexible and powerful photovoltaic systems.
{"title":"A Preferential Analysis of Physical Properties in Graphene Oxide Doped PEDOT:PSS Hole Transport Layers","authors":"Y. Sahoo, Omprakash Sahoo","doi":"10.30799/jacs.222.20060103","DOIUrl":"https://doi.org/10.30799/jacs.222.20060103","url":null,"abstract":"Flexible and semitransparent hole transport layers in perovskite-based photovoltaics have been attracting increasing attention in recent years. Among the benefits they provide, such as being easily reproducible and affordable, they pose their own problems with device degradation, stability, and surface wettability. We probed the graphene oxide doped PEDOT:PSS (GO)/poly(3,4 ethylenedioxythiophene):poly(styrene sulfonate) composite for the application in 2D carbonaceous hole transport layers to improve perovskite solar cells. Advantages and problems are pointed out as well as new perspectives to further modify and retract the drawbacks of conducting polymers. We discussed the advancement of the hole transport layer and described the effects of graphene oxide (dopant) on device transmission, surface wettability, and film quality. Basic principles and mechanisms are covered in the development of polymeric hole transport layers and interfacial properties. Findings included the decrease in device transmission, lessened oxidation of the perovskite, and superior surface wettability. This work highlights the importance and relevance of thin, flexible and powerful photovoltaic systems.","PeriodicalId":14902,"journal":{"name":"Journal of Advanced Chemical Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91454855","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 : 2020-05-02DOI: 10.30799/jacs.219.20060101
M. Kiran, S. Murugesan
In the present study energy efficient, economically scalable colloidal silver (Ag) nanoparticles were biosynthesized from marine brown seaweed Colpomenia sinuosa by green synthesis method. The marine macroscopic brown seaweed Colpomenia sinuosa was used in the experimental study for the biosynthesis of silver nanoparticle since they are rich in phytochemicals, bioactive compounds and secondary metabolites which has reducing agents that may be environmentally acceptable and eco-friendly. The biosynthesized silver nanoparticles from marine macroscopic brown seaweed were characterized by UV-vis spectroscopy which confirmed the surface plasmon resonance of silver nanoparticles, Fourier transform infrared (FT-IR) spectroscopy to identify the presence of various functional groups in biomolecules responsible for the bio reduction of Ag+ and capping/stabilization of silver nanoparticles. X-ray diffraction (XRD) to observe face center cubic (fcc) and crystalline nature of silver nanoparticles, thermogravimetric analysis (TGA) which revealed the thermal stability and purity of the silver nanoparticles. Particle size distribution and morphology were investigated by scanning electron microscope (SEM) which showed silver nanoparticles in the size range of 54-85 nm. The particle distribution under different nanometers was analyzed using transmission electron microscopy (TEM).
{"title":"Biosynthesis and Characterization of Silver Nanoparticles from Marine Macroscopic Brown Seaweed Colpomenia sinuosa (Mertens ex Roth) Derbes and Solier","authors":"M. Kiran, S. Murugesan","doi":"10.30799/jacs.219.20060101","DOIUrl":"https://doi.org/10.30799/jacs.219.20060101","url":null,"abstract":"In the present study energy efficient, economically scalable colloidal silver (Ag) nanoparticles were biosynthesized from marine brown seaweed Colpomenia sinuosa by green synthesis method. The marine macroscopic brown seaweed Colpomenia sinuosa was used in the experimental study for the biosynthesis of silver nanoparticle since they are rich in phytochemicals, bioactive compounds and secondary metabolites which has reducing agents that may be environmentally acceptable and eco-friendly. The biosynthesized silver nanoparticles from marine macroscopic brown seaweed were characterized by UV-vis spectroscopy which confirmed the surface plasmon resonance of silver nanoparticles, Fourier transform infrared (FT-IR) spectroscopy to identify the presence of various functional groups in biomolecules responsible for the bio reduction of Ag+ and capping/stabilization of silver nanoparticles. X-ray diffraction (XRD) to observe face center cubic (fcc) and crystalline nature of silver nanoparticles, thermogravimetric analysis (TGA) which revealed the thermal stability and purity of the silver nanoparticles. Particle size distribution and morphology were investigated by scanning electron microscope (SEM) which showed silver nanoparticles in the size range of 54-85 nm. The particle distribution under different nanometers was analyzed using transmission electron microscopy (TEM).","PeriodicalId":14902,"journal":{"name":"Journal of Advanced Chemical Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91084638","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 : 2019-12-10DOI: 10.30799/jacs.215.19050401
R. Gabriela, G. T. C. D. Carmen, J. Alfredo, A. Alejandro, G. N. Israel, M. Alejandro
In this work, the velocity fields and vorticity of an industrial bath sonoreactor of 500 kHz were obtained experimentally evaluated by PIV technique. Based on the results obtained immediately after the sonoreactor was turned on, the velocity and the axial flow number (𝑁𝑄𝑎𝑥(𝑧)), were calculated at different times. The formation of stable vortexes, near the sonoreactor walls, were observed after 5 minutes of sonoreactor operation. Due to the difficulty of perform measurements during the initial operation time simulations performed at small period of time were performed by the Large Eddy Simulation (LES), showing the trend of the flow in the sonoreactor.
{"title":"Evaluation and Simulation of An Industrial Sonoreactor Performance","authors":"R. Gabriela, G. T. C. D. Carmen, J. Alfredo, A. Alejandro, G. N. Israel, M. Alejandro","doi":"10.30799/jacs.215.19050401","DOIUrl":"https://doi.org/10.30799/jacs.215.19050401","url":null,"abstract":"In this work, the velocity fields and vorticity of an industrial bath sonoreactor of 500 kHz were obtained \u0000experimentally evaluated by PIV technique. Based on the results obtained immediately after the \u0000sonoreactor was turned on, the velocity and the axial flow number (𝑁𝑄𝑎𝑥(𝑧)), were calculated at different \u0000times. The formation of stable vortexes, near the sonoreactor walls, were observed after 5 minutes of \u0000sonoreactor operation. Due to the difficulty of perform measurements during the initial operation time \u0000simulations performed at small period of time were performed by the Large Eddy Simulation (LES), \u0000showing the trend of the flow in the sonoreactor.","PeriodicalId":14902,"journal":{"name":"Journal of Advanced Chemical Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90843448","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 : 2019-11-28DOI: 10.30799/jacs.216.19050303
A. Lakshmi
Article history: Received 30 October 2019 Accepted 17 November 2019 Available online 28 November 2019 The main aim of this work is environmental protection by investigation of efficient electrocoagulation of dyes by aluminum electrode cell setup with graphene oxide adsorbent. The efficiency of dye removal was evaluated by the absorbance of the Basic green 4 and Acid yellow solution at 621 nm and 425 nm respectively. The operating conditions of electrocoagulation such as current density (10-30 mA/cm2), electrolysis time (5-20 minutes), pH of the medium (2 to 10), stirring speed (150-350 rpm), inter electrode distance (0.8 to 2 cm) and NaCl concentration (1.5-5.0 g/L) were optimized and found to be 30 mA/cm2, 20 min, pH 8.0, 300 rpm, 2 cm and 5 g/L respectively. The results showed that the dye removal efficiency was enhanced to 99% by the addition of graphene oxide. The result of the present research work can be useful for an efficient large-scale treatment of industrial effluents contaminated with Basic green 4 and Acid yellow 23.
{"title":"Enhanced Electrocoagulation of Basic Green 4 and Acid Yellow 23 using Graphene Oxide as Adsorbent","authors":"A. Lakshmi","doi":"10.30799/jacs.216.19050303","DOIUrl":"https://doi.org/10.30799/jacs.216.19050303","url":null,"abstract":"Article history: Received 30 October 2019 Accepted 17 November 2019 Available online 28 November 2019 The main aim of this work is environmental protection by investigation of efficient electrocoagulation of dyes by aluminum electrode cell setup with graphene oxide adsorbent. The efficiency of dye removal was evaluated by the absorbance of the Basic green 4 and Acid yellow solution at 621 nm and 425 nm respectively. The operating conditions of electrocoagulation such as current density (10-30 mA/cm2), electrolysis time (5-20 minutes), pH of the medium (2 to 10), stirring speed (150-350 rpm), inter electrode distance (0.8 to 2 cm) and NaCl concentration (1.5-5.0 g/L) were optimized and found to be 30 mA/cm2, 20 min, pH 8.0, 300 rpm, 2 cm and 5 g/L respectively. The results showed that the dye removal efficiency was enhanced to 99% by the addition of graphene oxide. The result of the present research work can be useful for an efficient large-scale treatment of industrial effluents contaminated with Basic green 4 and Acid yellow 23.","PeriodicalId":14902,"journal":{"name":"Journal of Advanced Chemical Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83339999","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 : 2019-10-15DOI: 10.30799/jacs.214.19050302
T. Bandara, H. Wijesinghe, A. Senevirathna, T. Etampawala
In this study, cellulose fibre was extracted from banana pseudo-stem and converted into cellulose whiskers (CWs) with high-pressure defibrillation method. The CWs were characterized using FTIR, XRD and the results conform the structure of cellulose. XRD studies showed that the percentage crystallinity of bleached fibres is about 93%. The particle size analysis showed a bimodal distribution for CWs where approximately 21% of the sample has average size of 110 nm. The rubber compounds were prepared according to a general tyre tread formulation while incorporating the purified CWs in diluted centrifuged latex (NR) followed by converting them into rubber sheets to produce cellulose whiskers/natural rubber CW/NR composite. Meanwhile, the control was prepared without incorporating CW in the diluted centrifuged latex. The lowest Mooney viscosity and the highest stress relaxation coefficient of CW/NR composites ensured higher processability. Curing characteristics of the compounds were evaluated at 120 °C and physical properties were evaluated on par to the ASTM standards. The highest cure rate and better scorch time were observed in CW/NR composite. Most of the physical properties were superior. In overall, it is obvious that cellulose whiskers have a potential to use as reinforcing material for natural rubber tyre tread compounds.
{"title":"Cellulose Whiskers Derived from Banana Pseudo-Stem as Potential Reinforcement Filler for Tyre Tread Compounds","authors":"T. Bandara, H. Wijesinghe, A. Senevirathna, T. Etampawala","doi":"10.30799/jacs.214.19050302","DOIUrl":"https://doi.org/10.30799/jacs.214.19050302","url":null,"abstract":"In this study, cellulose fibre was extracted from banana pseudo-stem and converted into cellulose whiskers (CWs) with high-pressure defibrillation method. The CWs were characterized using FTIR, XRD and the results conform the structure of cellulose. XRD studies showed that the percentage crystallinity of bleached fibres is about 93%. The particle size analysis showed a bimodal distribution for CWs where approximately 21% of the sample has average size of 110 nm. The rubber compounds were prepared according to a general tyre tread formulation while incorporating the purified CWs in diluted centrifuged latex (NR) followed by converting them into rubber sheets to produce cellulose whiskers/natural rubber CW/NR composite. Meanwhile, the control was prepared without incorporating CW in the diluted centrifuged latex. The lowest Mooney viscosity and the highest stress relaxation coefficient of CW/NR composites ensured higher processability. Curing characteristics of the compounds were evaluated at 120 °C and physical properties were evaluated on par to the ASTM standards. The highest cure rate and better scorch time were observed in CW/NR composite. Most of the physical properties were superior. In overall, it is obvious that cellulose whiskers have a potential to use as reinforcing material for natural rubber tyre tread compounds.","PeriodicalId":14902,"journal":{"name":"Journal of Advanced Chemical Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76921385","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 present study was carried out to evaluate the antioxidant activity of chemical constituents isolated from Albizia ferruginea grapes, a plant of the Fabaceae family. The plant is used in traditional pharmacopoeia to treat dysentery, bronchial infections, infections from stings, gallbladder caused by fever and intestinal problems. Chemical study of the CH2Cl2-MeOH (1:1) extract led to the isolation of six compounds: (22E, 24S)-stigmasta-5,22,25-trien-3β-ol (1); 3,4,5,7-tetrahydroxyflavone (luteolin) (2); quercetin (3); kaempferol-7-O-β-D-glucoside (4); alphitolic acid (5); β-sitosteryl palmitate (6). The compounds (22E, 24S)-stigmasta-5,22,25-trien-3β-ol (1); 3,4,5,7-tetrahydroxyflavone (luteolin) (2); kaempferol-7-O-β-D-glucoside (4); alphitolic acid (5) and β-sitosteryl palmitate (6) were isolated from Albizia ferruginea for the first time. The structures of the isolated compounds were determined based on spectroscopic analysis and comparison of their spectral data with those in literature. The results of the antioxidant test revealed that at a dosage of 75 μg/mL the percentage weight of compound 3 was the highest, at dosages of 100 and 300 μg/mL, compound 2 was highest and at dosage of 150 μg/mL, compound 1 was the highest. The anti-radical activities of the compounds were significantly different (p
{"title":"Antioxidant Activity of the Chemical Constituents Isolated from the Roots of Albizia ferruginea (Guill. and Perr.) Benth. (Fabaceae)","authors":". Y.O.NgansoDitchou, . C.D.AbahKombo, . M.T.G.MalaOpono, . B.Nyasse","doi":"10.30799/jacs.212.19050301","DOIUrl":"https://doi.org/10.30799/jacs.212.19050301","url":null,"abstract":"The present study was carried out to evaluate the antioxidant activity of chemical constituents isolated from Albizia ferruginea grapes, a plant of the Fabaceae family. The plant is used in traditional pharmacopoeia to treat dysentery, bronchial infections, infections from stings, gallbladder caused by fever and intestinal problems. Chemical study of the CH2Cl2-MeOH (1:1) extract led to the isolation of six compounds: (22E, 24S)-stigmasta-5,22,25-trien-3β-ol (1); 3,4,5,7-tetrahydroxyflavone (luteolin) (2); quercetin (3); kaempferol-7-O-β-D-glucoside (4); alphitolic acid (5); β-sitosteryl palmitate (6). The compounds (22E, 24S)-stigmasta-5,22,25-trien-3β-ol (1); 3,4,5,7-tetrahydroxyflavone (luteolin) (2); kaempferol-7-O-β-D-glucoside (4); alphitolic acid (5) and β-sitosteryl palmitate (6) were isolated from Albizia ferruginea for the first time. The structures of the isolated compounds were determined based on spectroscopic analysis and comparison of their spectral data with those in literature. The results of the antioxidant test revealed that at a dosage of 75 μg/mL the percentage weight of compound 3 was the highest, at dosages of 100 and 300 μg/mL, compound 2 was highest and at dosage of 150 μg/mL, compound 1 was the highest. The anti-radical activities of the compounds were significantly different (p","PeriodicalId":14902,"journal":{"name":"Journal of Advanced Chemical Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86684902","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 : 2019-08-01DOI: 10.30799/JACS.209.19050203
Sukdev Majumder, Mitali Kundu, R. Ghosh, Ranjoy Das, Nitish Roy, Mahendra Nath Roy
Molecular interactions of two (ILS) [BMIM][C8SO4] and [MOIM]Cl with amino acids (AA) (AA= L-tyr, L-phe) in aqueous medium have been investigated by molar conductivities (Ʌ) at three different temperatures. Spectroscopic studies have been performed to investigate the association behavior between the ILs and the selected amino acids and the spontaneity of this process. The 1H NMR spectroscopy has also been carried out to expose the change in electronic conditions of various protons of ILs in the presence of different amino acids. All the results have been interpreted on the light of possible molecular interactions operating in the ternary system and varies in the order of ([BMIM][C8SO4] + L-tyr)> ([MOIM]Cl + L-tyr)> ([BMIM][C8SO4] + L-phe)> ([MOIM]Cl + L-phe) in water. The obtained experimental parameters will be extremely supportive to understand the mixing effect and other complicated biological process between amino acids and the chosen ionic liquids.
{"title":"Exploring Diverse Interactions of Some Surface-Active Ionic Liquids with Amino Acids Prevalent in Aqueous Environments by Physicochemical Contrivance","authors":"Sukdev Majumder, Mitali Kundu, R. Ghosh, Ranjoy Das, Nitish Roy, Mahendra Nath Roy","doi":"10.30799/JACS.209.19050203","DOIUrl":"https://doi.org/10.30799/JACS.209.19050203","url":null,"abstract":"Molecular interactions of two (ILS) [BMIM][C8SO4] and [MOIM]Cl with amino acids (AA) (AA= L-tyr, L-phe) in aqueous medium have been investigated by molar conductivities (Ʌ) at three different temperatures. Spectroscopic studies have been performed to investigate the association behavior between the ILs and the selected amino acids and the spontaneity of this process. The 1H NMR spectroscopy has also been carried out to expose the change in electronic conditions of various protons of ILs in the presence of different amino acids. All the results have been interpreted on the light of possible molecular interactions operating in the ternary system and varies in the order of ([BMIM][C8SO4] + L-tyr)> ([MOIM]Cl + L-tyr)> ([BMIM][C8SO4] + L-phe)> ([MOIM]Cl + L-phe) in water. The obtained experimental parameters will be extremely supportive to understand the mixing effect and other complicated biological process between amino acids and the chosen ionic liquids.","PeriodicalId":14902,"journal":{"name":"Journal of Advanced Chemical Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74528444","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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