The experiment was conducted during 2021-22 in rabi season. The field study to assess the effects of organic manures and micronutrients on seed production of carrot (Daucus carota L.) cv. Pusa Rudhira was carried out at Horticulture farm, SKNCOA, Jobner, Rajasthan, India. The study revealed that the application of Poultry manure @ 2.5 t/ha significantly increased the plant height (41.95 cm), Number of shoots per plant (12.71), chlorophyll content (1.11 mg/100g), days to 50% umbel initiation (134.50 days) , number of umbels per plant (17.30), number of seed per umbel (1177.35), diameter of umbel (16.71 cm), seed weight per plant (8.43 g), days to seed maturity (185.27 minimum days) and seed yield per hectare (6.24 q/ha). Similarly, the spray of ZnSO4 @ 0.5% to the carrot crop significantly increased the plant height (40.60 cm), number of shoots per plant (12.49), chlorophyll content (1.07 mg/100g), days to 50% umbel initiation (133.51 days), number of umbels per plant (16.30), number of seed per umbel (1175.30), diameter of umbel (16.10 cm), seed weight per plant (8.39 g), days to seed maturity (184.12 days ) and seed yield per hectare (6.21 q/ha)
{"title":"Effect of organic manures and micronutrients on seed production of carrot (Daucus carota L.)","authors":"Asha Dhaka, D. Yadav, Pooja Dhaka, K. Choudhary","doi":"10.25082/cr.2022.01.005","DOIUrl":"https://doi.org/10.25082/cr.2022.01.005","url":null,"abstract":"The experiment was conducted during 2021-22 in rabi season. The field study to assess the effects of organic manures and micronutrients on seed production of carrot (Daucus carota L.) cv. Pusa Rudhira was carried out at Horticulture farm, SKNCOA, Jobner, Rajasthan, India. The study revealed that the application of Poultry manure @ 2.5 t/ha significantly increased the plant height (41.95 cm), Number of shoots per plant (12.71), chlorophyll content (1.11 mg/100g), days to 50% umbel initiation (134.50 days) , number of umbels per plant (17.30), number of seed per umbel (1177.35), diameter of umbel (16.71 cm), seed weight per plant (8.43 g), days to seed maturity (185.27 minimum days) and seed yield per hectare (6.24 q/ha). Similarly, the spray of ZnSO4 @ 0.5% to the carrot crop significantly increased the plant height (40.60 cm), number of shoots per plant (12.49), chlorophyll content (1.07 mg/100g), days to 50% umbel initiation (133.51 days), number of umbels per plant (16.30), number of seed per umbel (1175.30), diameter of umbel (16.10 cm), seed weight per plant (8.39 g), days to seed maturity (184.12 days ) and seed yield per hectare (6.21 q/ha)","PeriodicalId":66475,"journal":{"name":"化学报告(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41542600","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}
Yeinner Tarazona, M. Rojas-Valencia, J. Araiza-Aguilar
The adsorption capacity of three eggshell bioadsorbents was evaluated to remove contaminants from raw leachate. Optimal conditions for the removal of suspended solids, color, and organic compounds, as COD, were achieved by batch experiments with three levels of pH and absorbent concentrations. Kinetic studies and isotherms were developed to understand the behavior of COD removal by the bioadsorbents. The chemical and physical characterizations indicate the leachate used in the present study had characteristics between mature and intermediate leachates. The optimal adsorption conditions were pH 2.0 and 1.0 gram (0.5 g/L) of adsorbent. Adsorbent M showed the best adsorption capacities, removing 99.06% (1446 NTU) of turbidity, 86.25% (4140 UPt-Co) of color and 54.56% of COD (1530mg/L). The data obtained through the kinetic and isothermal tests were better fitted to the pseudo first order and Langmuir models, with an equilibrium adsorption capacity (Qe) of 139 mg of COD/g of adsorbent and a specific speed of 1.51 min-1.
{"title":"Evaluation of an adsorption process for the treatment of leachates using biopolymers extracted from organic waste obtained from the poultry industry","authors":"Yeinner Tarazona, M. Rojas-Valencia, J. Araiza-Aguilar","doi":"10.25082/cr.2022.01.001","DOIUrl":"https://doi.org/10.25082/cr.2022.01.001","url":null,"abstract":"The adsorption capacity of three eggshell bioadsorbents was evaluated to remove contaminants from raw leachate. Optimal conditions for the removal of suspended solids, color, and organic compounds, as COD, were achieved by batch experiments with three levels of pH and absorbent concentrations. Kinetic studies and isotherms were developed to understand the behavior of COD removal by the bioadsorbents. The chemical and physical characterizations indicate the leachate used in the present study had characteristics between mature and intermediate leachates. The optimal adsorption conditions were pH 2.0 and 1.0 gram (0.5 g/L) of adsorbent. Adsorbent M showed the best adsorption capacities, removing 99.06% (1446 NTU) of turbidity, 86.25% (4140 UPt-Co) of color and 54.56% of COD (1530mg/L). The data obtained through the kinetic and isothermal tests were better fitted to the pseudo first order and Langmuir models, with an equilibrium adsorption capacity (Qe) of 139 mg of COD/g of adsorbent and a specific speed of 1.51 min-1.","PeriodicalId":66475,"journal":{"name":"化学报告(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69217033","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 back-sheet shields the solar panel from UV rays, moisture, dust, and other environmental factors. With the enormous growth of the solar industry year after year, the demand for recycling is also increasing rapidly. In the present study, the back-sheet layer was extracted from a waste crystalline silicon PV module by thermally heating the module at 130˚C temperature. Various characterization techniques, including Raman, FTIR, SEM-EDAX, XRD, and TGA, were used to examine extracted back-sheet layer properties for its reuse. The Raman and FTIR spectra of extracted back-sheet are quite similar to those of reference PET back-sheet, indicating that no significant changes in composition occurred during the extraction process. The extracted back-sheet has a composition of carbon and oxygen as witnessed from EDAX spectroscopy. The extracted back sheet maintained its semicrystalline behavior as that of the reference back sheet, observed by XRD spectroscopy. Thermogravimetric analysis revealed that the thermal stability of extracted back-sheet is up to 252˚C in the air environment and up to 315˚C in the inert environment. Thermal degradation of extracted back-sheet is a two-step process in an air environment observed by differential thermogravimetry. The observed properties of extracted back-sheet are comparable to those of commercially available back-sheet, and the same may be reused in solar and polymer industries after appropriate processing.
{"title":"Extraction and analysis of back-sheet layer from waste silicon solar modules","authors":"C. Chitra, Dheeraj Sah, P. Saini, Sushil Kumar","doi":"10.25082/cr.2022.01.004","DOIUrl":"https://doi.org/10.25082/cr.2022.01.004","url":null,"abstract":"The back-sheet shields the solar panel from UV rays, moisture, dust, and other environmental factors. With the enormous growth of the solar industry year after year, the demand for recycling is also increasing rapidly. In the present study, the back-sheet layer was extracted from a waste crystalline silicon PV module by thermally heating the module at 130˚C temperature. Various characterization techniques, including Raman, FTIR, SEM-EDAX, XRD, and TGA, were used to examine extracted back-sheet layer properties for its reuse. The Raman and FTIR spectra of extracted back-sheet are quite similar to those of reference PET back-sheet, indicating that no significant changes in composition occurred during the extraction process. The extracted back-sheet has a composition of carbon and oxygen as witnessed from EDAX spectroscopy. The extracted back sheet maintained its semicrystalline behavior as that of the reference back sheet, observed by XRD spectroscopy. Thermogravimetric analysis revealed that the thermal stability of extracted back-sheet is up to 252˚C in the air environment and up to 315˚C in the inert environment. Thermal degradation of extracted back-sheet is a two-step process in an air environment observed by differential thermogravimetry. The observed properties of extracted back-sheet are comparable to those of commercially available back-sheet, and the same may be reused in solar and polymer industries after appropriate processing.","PeriodicalId":66475,"journal":{"name":"化学报告(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69217112","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}
Textile solid waste disposal and utilization is currently an important concern worldwide. Fashion and traditional articles of textiles are sourcing the solid textile waste generation. An increasing population and consumption of fiber and textile articles emphasize the development studies for the re-use of solid textile waste. Production of textiles is accompanied by the release of volatile emission and effluent during processing, and disposal of fibrous articles are producing solid waste. The hazardous waste generated from the textile can be seen as pre- consumer solid waste (fiber, yarn, and fabric pieces), processing waste (volatiles, chemicals and effluent release during the process), and post- consumer waste (textile fabric, yarn, apparel, home textiles, technical textiles, etc.) dispose to environment following the service life. Therefore, re-using the fiber and textile articles can significantly reduce undesired effects to environment. Designing the products using solid textile waste can be a useful source for reducing the environmental hazard. This study describes the re-use of various fiber and textiles, though the case studies, particularly denim fabric, in designing the products for home decoration.
{"title":"Textile solid waste in product development studies","authors":"Faheem Uddin, Komal Umer, Syeda Tehniyat Anjum","doi":"10.25082/cr.2021.01.005","DOIUrl":"https://doi.org/10.25082/cr.2021.01.005","url":null,"abstract":"Textile solid waste disposal and utilization is currently an important concern worldwide. Fashion and traditional articles of textiles are sourcing the solid textile waste generation. An increasing population and consumption of fiber and textile articles emphasize the development studies for the re-use of solid textile waste. Production of textiles is accompanied by the release of volatile emission and effluent during processing, and disposal of fibrous articles are producing solid waste. The hazardous waste generated from the textile can be seen as pre- consumer solid waste (fiber, yarn, and fabric pieces), processing waste (volatiles, chemicals and effluent release during the process), and post- consumer waste (textile fabric, yarn, apparel, home textiles, technical textiles, etc.) dispose to environment following the service life. Therefore, re-using the fiber and textile articles can significantly reduce undesired effects to environment. Designing the products using solid textile waste can be a useful source for reducing the environmental hazard. This study describes the re-use of various fiber and textiles, though the case studies, particularly denim fabric, in designing the products for home decoration.","PeriodicalId":66475,"journal":{"name":"化学报告(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69217015","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}
Abid Hussain, Sonia Shabbir, M. Faizan, Muhammad Ali Tajwar
Since the outbreak of COVID-19 in Wuhan, China, it has dramatically changed the global geopolitics, economics, and even society standard norms. The present world scenario is changed regarding business, traveling, and education. Rapid global dissemination and the high mortality rate of coronaviruses are the greatest challenges for drug developers. It will be moving forward toward the identification and treatment of emerging coronaviruses with the aid of nanotechnology. The COVID-19 pandemic raised the question of researchers’ capability to manage this dilemma in a short period. In the present review, we described how hallow material could be developed as a pro-drug that shows an excellent therapeutic effect. Hollow nanoparticles that exploration of antiviral or diagnostic agents against emerging coronaviruses. Hollow nanomaterials in vaccine development are essential because hollow nanocomposites are suitable for mimicking viral structures and antigen delivery. A biosensor that generates a signal from a transducer for comparing and analyzing biological conjugates such as cell receptors, antibodies, RNA, DNA, and nucleic acids. Different biosensors, such as graphene-based biosensors, nanoplasmonic sensor chips, nanomaterial biosensors, electrochemical biosensors, dual modality biosensors, and optical biosensors, have several advantages, characteristics, and a wide range of applications, most remarkably in medical treatment and are used for monitoring and diagnosis. This review focuses on modern experimental studies to identify intelligent and innovative bio/nanomaterials and matrices for developing targeted and controlled drug release systems, nanosensors and nanovaccines to combat pathogenic viruses.
{"title":"Progress of hollow materials in diagnosis of COVID-19","authors":"Abid Hussain, Sonia Shabbir, M. Faizan, Muhammad Ali Tajwar","doi":"10.25082/cr.2022.01.002","DOIUrl":"https://doi.org/10.25082/cr.2022.01.002","url":null,"abstract":"Since the outbreak of COVID-19 in Wuhan, China, it has dramatically changed the global geopolitics, economics, and even society standard norms. The present world scenario is changed regarding business, traveling, and education. Rapid global dissemination and the high mortality rate of coronaviruses are the greatest challenges for drug developers. It will be moving forward toward the identification and treatment of emerging coronaviruses with the aid of nanotechnology. The COVID-19 pandemic raised the question of researchers’ capability to manage this dilemma in a short period. In the present review, we described how hallow material could be developed as a pro-drug that shows an excellent therapeutic effect. Hollow nanoparticles that exploration of antiviral or diagnostic agents against emerging coronaviruses. Hollow nanomaterials in vaccine development are essential because hollow nanocomposites are suitable for mimicking viral structures and antigen delivery. A biosensor that generates a signal from a transducer for comparing and analyzing biological conjugates such as cell receptors, antibodies, RNA, DNA, and nucleic acids. Different biosensors, such as graphene-based biosensors, nanoplasmonic sensor chips, nanomaterial biosensors, electrochemical biosensors, dual modality biosensors, and optical biosensors, have several advantages, characteristics, and a wide range of applications, most remarkably in medical treatment and are used for monitoring and diagnosis. This review focuses on modern experimental studies to identify intelligent and innovative bio/nanomaterials and matrices for developing targeted and controlled drug release systems, nanosensors and nanovaccines to combat pathogenic viruses.","PeriodicalId":66475,"journal":{"name":"化学报告(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69217091","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}
Nanoparticles (NPs) of lead tetroxide (Pb3O4) with the spherical morphology were manufactured by the reaction of lead nitrate with sodium hydroxide, while the nanoparticles (NPs) of red iron oxide (Fe2O3) with similar morphology were fabricated by hydrothermal route in the presence of ferric chloride hexahydrate as the precursor. Evaluation of the chemical structure, the purity and the morphology of the manufactured Fe2O3 and Pb3O4 NPs was carried out by analysis via X-ray diffraction (XRD) as well as scanning electron microscope (SEM). The outcomes of XRD recognized establishment of the desired oxides, wherever the SEM images clearly exhibited the morphology of the manufactured Pb3O4 and Fe2O3 as the spherical NPs with an average particle sizes of near to 40 and 46 nm, respectively. The catalytic effect of the metallic oxide NPs on the perfection of ammonium perchlorate (AP) thermal decomposing was established by testing their AP nano-composites via differential scanning calorimetric (DSC) together with thermogravimetric analysis (TG). Thermal behavior studies displayed that adding of 5% Fe2O3/Pb3O4 NPs (as the mixture) delivers a concerned catalytic effect during AP thermal decomposition. Additionally, thermal decomposition of AP could be amended by adding of 2% Pb3O4 NPs. Further comparison of the NPs catalytic effects was obtained by computing the values of activation energies (E) and thermodynamic parameters (i.e., ΔS#, ΔH# and ΔG#) for their thermal decomposition by non-isothermal approaches.
{"title":"Fabrication of Pb₃O₄ and Fe₂O₃ nanoparticles and their application as the catalysts in thermal decomposition of ammonium perchlorate","authors":"Hossein Momenizadeh Pandas, M. Fazli","doi":"10.25082/cr.2022.01.003","DOIUrl":"https://doi.org/10.25082/cr.2022.01.003","url":null,"abstract":"Nanoparticles (NPs) of lead tetroxide (Pb3O4) with the spherical morphology were manufactured by the reaction of lead nitrate with sodium hydroxide, while the nanoparticles (NPs) of red iron oxide (Fe2O3) with similar morphology were fabricated by hydrothermal route in the presence of ferric chloride hexahydrate as the precursor. Evaluation of the chemical structure, the purity and the morphology of the manufactured Fe2O3 and Pb3O4 NPs was carried out by analysis via X-ray diffraction (XRD) as well as scanning electron microscope (SEM). The outcomes of XRD recognized establishment of the desired oxides, wherever the SEM images clearly exhibited the morphology of the manufactured Pb3O4 and Fe2O3 as the spherical NPs with an average particle sizes of near to 40 and 46 nm, respectively. The catalytic effect of the metallic oxide NPs on the perfection of ammonium perchlorate (AP) thermal decomposing was established by testing their AP nano-composites via differential scanning calorimetric (DSC) together with thermogravimetric analysis (TG). Thermal behavior studies displayed that adding of 5% Fe2O3/Pb3O4 NPs (as the mixture) delivers a concerned catalytic effect during AP thermal decomposition. Additionally, thermal decomposition of AP could be amended by adding of 2% Pb3O4 NPs. Further comparison of the NPs catalytic effects was obtained by computing the values of activation energies (E) and thermodynamic parameters (i.e., ΔS#, ΔH# and ΔG#) for their thermal decomposition by non-isothermal approaches.","PeriodicalId":66475,"journal":{"name":"化学报告(英文)","volume":"513 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69217102","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 aims for characterization and classification of five different spent petroleum refinery catalysts followed by metal recovery via bioleaching. The nomenclature given to the different spent catalyst (SC) is SC1, SC2, SC3, SC4 and SC5 collected from an Indian petroleum refinery. All spent catalysts were crushed and ground prior to their characterization by X-Ray Fluorescence for chemical composition followed by X-Ray Diffraction and Scanning Electron Microscopy-Energy Dispersive X-Ray Spectroscopy for their mineralogy. Further, all five spent catalysts were classified based upon their chemical composition and mineralogy. Metal recovery from the spent catalysts was carried out by bioleaching by a mixed microbial consortium of iron and Sulphur oxidizing microorganisms. Most of the spent catalysts showed very significant metal recovery with respect to Ni, Cu, Cr, Mo, Zn, Sr and Ti. The study provides a possible metal recovery route via bioleaching for further testing and scaling up.
{"title":"Characterization of different types of petroleum refinery spent catalyst followed by microbial mediated leaching of metal values","authors":"N. Nagar, H. Garg, C. Gahan","doi":"10.25082/CR.2021.01.002","DOIUrl":"https://doi.org/10.25082/CR.2021.01.002","url":null,"abstract":"The present study aims for characterization and classification of five different spent petroleum refinery catalysts followed by metal recovery via bioleaching. The nomenclature given to the different spent catalyst (SC) is SC1, SC2, SC3, SC4 and SC5 collected from an Indian petroleum refinery. All spent catalysts were crushed and ground prior to their characterization by X-Ray Fluorescence for chemical composition followed by X-Ray Diffraction and Scanning Electron Microscopy-Energy Dispersive X-Ray Spectroscopy for their mineralogy. Further, all five spent catalysts were classified based upon their chemical composition and mineralogy. Metal recovery from the spent catalysts was carried out by bioleaching by a mixed microbial consortium of iron and Sulphur oxidizing microorganisms. Most of the spent catalysts showed very significant metal recovery with respect to Ni, Cu, Cr, Mo, Zn, Sr and Ti. The study provides a possible metal recovery route via bioleaching for further testing and scaling up.","PeriodicalId":66475,"journal":{"name":"化学报告(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69216520","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 objective of this study was to show and crosscheck the seed yield and oil composition of three different seeds growing in different regions of Turkey. Extraction with n-hexane solvent indicated that there were differences in terms of oil yield between the regions. The average oil yield was 33.8% and 33.0% seed-I, 35.7% seed-II (Region-a) and 32.6% seed-III (Region-b) oil yields were obtained. The highest fatty acid content of hemp was found as: linoleic acid (average 55.24%) followed by oleic acid (average 17.20%) and α-linolenic acid (average 16.02%). Crude ash, total dry matter and crude protein analyzes were also performed. It was observed that the hemp seed oil yield was dependent on the extraction whereas extraction had no influence on the fatty acid content. Comparison of the seed oil yield with the other studies indicated that geographical region as well as the extraction method may affect the seed oil yield.
{"title":"An ideal fatty acid composition for human health: Hemp (Cannabis sativa L.) seed","authors":"Ezgi Aytaç","doi":"10.25082/cr.2021.01.003","DOIUrl":"https://doi.org/10.25082/cr.2021.01.003","url":null,"abstract":"The objective of this study was to show and crosscheck the seed yield and oil composition of three different seeds growing in different regions of Turkey. Extraction with n-hexane solvent indicated that there were differences in terms of oil yield between the regions. The average oil yield was 33.8% and 33.0% seed-I, 35.7% seed-II (Region-a) and 32.6% seed-III (Region-b) oil yields were obtained. The highest fatty acid content of hemp was found as: linoleic acid (average 55.24%) followed by oleic acid (average 17.20%) and α-linolenic acid (average 16.02%). Crude ash, total dry matter and crude protein analyzes were also performed. It was observed that the hemp seed oil yield was dependent on the extraction whereas extraction had no influence on the fatty acid content. Comparison of the seed oil yield with the other studies indicated that geographical region as well as the extraction method may affect the seed oil yield.","PeriodicalId":66475,"journal":{"name":"化学报告(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69216927","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}
Giant polymer vesicles consisting of amphiphilic diblock copolymers are helpful as artificial biomembrane models based on many similarities in their size, structure, morphological transformation, membrane permeability, etc. This paper describes the creation of neuron-like tubule extension employing the polymer vesicles. The polymerization-induced self-assembly was performed in the presence of micron-sized spherical vesicles consisting of poly(methacrylic acid)-block-poly(methyl methacrylate-random-methacrylic acid), PMAA-b-P(MMA-r-MAA), through the photo nitroxide-mediated controlled/living radical polymerization (photo-NMP) using 4-methoxy-2,2,6,6-tetramethylpiperidine-1-oxyl (MTEMPO) as the mediator. The photo-NMP of methyl methacrylate (MMA) and methacrylic acid (MAA) was carried out in an aqueous methanol solution (CH3OH/H2O = 3/1 v/v) using poly(methacrylic acid) (PMAA) end-capped with MTEMPO and the spherical vesicles of PMAA141-b-P(MMA0.831-r-MAA0.169)368 with an 11.7-mm diameter. The vesicles projected many processes on their surface during the early stage of the polymerization. As the polymerization progressed, only one or two of the processes extended to thick tubules, accompanied by the slow growth of thin tubules. Further progress of the polymerization elongated the thick tubules and caused branching of the tubules. The tubules had a vesicular structure because cup-like vesicles joined in line were formed during the initial stage of the extension. The polymerization livingness supported the tubule extension based on a linear increase in the molecular weight of the component copolymer and a negligible change in the molecular weight distribution versus the monomer conversion. The spherical vesicles were similar to the neurons in the tubule extension for the initial projection, followed by the elongation and branching. This similarity implies that the neurite extension in the neurons is related to the inherent property of the bilayer membrane.
{"title":"Neuron-like tubule extension of giant polymer vesicles","authors":"E. Yoshida","doi":"10.25082/cr.2021.01.004","DOIUrl":"https://doi.org/10.25082/cr.2021.01.004","url":null,"abstract":"Giant polymer vesicles consisting of amphiphilic diblock copolymers are helpful as artificial biomembrane models based on many similarities in their size, structure, morphological transformation, membrane permeability, etc. This paper describes the creation of neuron-like tubule extension employing the polymer vesicles. The polymerization-induced self-assembly was performed in the presence of micron-sized spherical vesicles consisting of poly(methacrylic acid)-block-poly(methyl methacrylate-random-methacrylic acid), PMAA-b-P(MMA-r-MAA), through the photo nitroxide-mediated controlled/living radical polymerization (photo-NMP) using 4-methoxy-2,2,6,6-tetramethylpiperidine-1-oxyl (MTEMPO) as the mediator. The photo-NMP of methyl methacrylate (MMA) and methacrylic acid (MAA) was carried out in an aqueous methanol solution (CH3OH/H2O = 3/1 v/v) using poly(methacrylic acid) (PMAA) end-capped with MTEMPO and the spherical vesicles of PMAA141-b-P(MMA0.831-r-MAA0.169)368 with an 11.7-mm diameter. The vesicles projected many processes on their surface during the early stage of the polymerization. As the polymerization progressed, only one or two of the processes extended to thick tubules, accompanied by the slow growth of thin tubules. Further progress of the polymerization elongated the thick tubules and caused branching of the tubules. The tubules had a vesicular structure because cup-like vesicles joined in line were formed during the initial stage of the extension. The polymerization livingness supported the tubule extension based on a linear increase in the molecular weight of the component copolymer and a negligible change in the molecular weight distribution versus the monomer conversion. The spherical vesicles were similar to the neurons in the tubule extension for the initial projection, followed by the elongation and branching. This similarity implies that the neurite extension in the neurons is related to the inherent property of the bilayer membrane.","PeriodicalId":66475,"journal":{"name":"化学报告(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69216951","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 long afterglow fluorescent material of M1-3xAl2O4:Eu2+x/Dy3+2x (M2+ = Sr2+, Ca2+ and Ba2+) phosphors are successfully synthesized by calcining precursor obtained via co-precipitation method at 1300 oC for 4 h with reducing atmosphere (20% H2 and 80% N2. The phase evolution, morphology and afterglow fluorescent properties are systematically studied by the various instruments of XRD, FE-SEM, PLE/PL spectroscopy and fluorescence decay analysis. The PL spectra shows that the Sr1-3xAl2O4:Eu2+x/Dy3+2x phosphors display vivid green emission at ~519 nm (4f65d1→4f7 transition of Eu2+) with monitoring of the maximum excitation wavelength at ~334 nm (8S7/2→6IJ transition of Eu2+), among which the optimal concentration of Eu2+ and Dy3+ is 15 at % and 30 at %, respectively. The color coordinates and temperature of Sr1-3xAl2O4:Eu2+x/Dy3+2x phosphors are approximately at (~0.27, ~0.57) and ~6700 K, respectively. On the above basis, the M0.55Al2O4:Eu2+0.15/Dy3+0.3 (M2+ = Ca2+ and Ba2+) phosphors is obtained by the same method. The PL spectra of these phosphors shows the strongest blue emission at ~440 nm and cyan emission at ~499 nm under ~334 nm wavelength excitation, respectively, which are blue shifted comparing to Sr1-3xAl2O4:Eu2+x/Dy3+2x phosphors. The color coordinates and temperatures of M0.55Al2O4:Eu2+0.15/Dy3+0.3 (M2+ = Ca2+ and Ba2+) phosphors are approximately at (~0.18, ~0.09)，~2000 K and (~0.18, ~0.42), ~11600 K, respectively. In this work, long afterglow materials of green, blue and cyan aluminates phosphors with excellent properties have been prepared, in order to obtain wide application in the field of night automatic lighting and display.
{"title":"Synthesis of M1-3xAl2O4:Eu2+x/Dy3+2x (M2+= Sr2+, Ca2+ and Ba2+) phosphors with long-lasting phosphorescence properties via co-precipitation method","authors":"Jinkai Li, B. Liu, Qi Chen, Yizhong Lu, Z. Liu","doi":"10.25082/CR.2019.02.008","DOIUrl":"https://doi.org/10.25082/CR.2019.02.008","url":null,"abstract":"The long afterglow fluorescent material of M1-3xAl2O4:Eu2+x/Dy3+2x (M2+ = Sr2+, Ca2+ and Ba2+) phosphors are successfully synthesized by calcining precursor obtained via co-precipitation method at 1300 oC for 4 h with reducing atmosphere (20% H2 and 80% N2. The phase evolution, morphology and afterglow fluorescent properties are systematically studied by the various instruments of XRD, FE-SEM, PLE/PL spectroscopy and fluorescence decay analysis. The PL spectra shows that the Sr1-3xAl2O4:Eu2+x/Dy3+2x phosphors display vivid green emission at ~519 nm (4f65d1→4f7 transition of Eu2+) with monitoring of the maximum excitation wavelength at ~334 nm (8S7/2→6IJ transition of Eu2+), among which the optimal concentration of Eu2+ and Dy3+ is 15 at % and 30 at %, respectively. The color coordinates and temperature of Sr1-3xAl2O4:Eu2+x/Dy3+2x phosphors are approximately at (~0.27, ~0.57) and ~6700 K, respectively. On the above basis, the M0.55Al2O4:Eu2+0.15/Dy3+0.3 (M2+ = Ca2+ and Ba2+) phosphors is obtained by the same method. The PL spectra of these phosphors shows the strongest blue emission at ~440 nm and cyan emission at ~499 nm under ~334 nm wavelength excitation, respectively, which are blue shifted comparing to Sr1-3xAl2O4:Eu2+x/Dy3+2x phosphors. The color coordinates and temperatures of M0.55Al2O4:Eu2+0.15/Dy3+0.3 (M2+ = Ca2+ and Ba2+) phosphors are approximately at (~0.18, ~0.09)，~2000 K and (~0.18, ~0.42), ~11600 K, respectively. In this work, long afterglow materials of green, blue and cyan aluminates phosphors with excellent properties have been prepared, in order to obtain wide application in the field of night automatic lighting and display.","PeriodicalId":66475,"journal":{"name":"化学报告(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41775212","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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