Abstract The effect of microwave pretreatment and moisture levels of Camelina sativa seeds on the quality of extracted oil by cold press was investigated. The seed moistures were adjusted to 2.5%, 5.0%, 7.5%, and 10.0% and pretreated with microwaves for 0, 1, 2, and 3 min. Microwave pretreatment (3 min) of the seeds with 2.5% moisture increased the oil extraction yield by ∼11% compared to the control sample. The highest amount of acidity (0.564 g FFA·g −1 oil), peroxide value (2.4 meq O 2 ·kg −1 oil), carotenoid (5.26 mg·kg −1 oil), and browning index (0.710) were found in the oil extracted from seeds with 10% moisture and 3 min microwave pretreatment. The total phenolic compound was increased by microwave pretreatment but was mitigated by the seed moisture content, and the highest amount (208.24 mg caffeic acid·100 g −1 oil) was observed at 3 min microwave pretreatment of the seeds with 2.5% moisture. Chlorophyll content decreased by both microwave pretreatment and seed moisture content in camelina oil. Generally, the fatty acid composition of the extracted oils was not affected by the seed pretreatments. In conclusion, pretreatment of the camelina seeds before oil extraction is suggested to obtain a high oil extraction yield with a good quality oil.
摘要研究了微波预处理和水分水平对冷榨油品质的影响。将种子水分调整为2.5%、5.0%、7.5%和10.0%，微波预处理0、1、2和3分钟。与对照样品相比，2.5%水分的种子微波预处理(3分钟)使出油率提高了约11%。水分为10%，微波预处理3 min的种子油酸度最高(0.564 g FFA·g−1油)，过氧化值最高(2.4 meq O 2·kg−1油)，类胡萝卜素最高(5.26 mg·kg−1油)，褐变指数最高(0.710)。微波预处理使总酚含量增加，但受种子含水量的影响，在2.5%水分条件下微波预处理3 min时，总酚含量最高，为208.24 mg咖啡酸·100 g−1油。微波预处理降低了亚麻荠籽油叶绿素含量和籽粒水分含量。总的来说，种子预处理对提取油的脂肪酸组成没有影响。综上所述，建议在提取油分前进行预处理，以获得高提取率和优质油分。
{"title":"Microwave-accelerated pretreatment technique in green extraction of oil and bioactive compounds from camelina seeds: Effectiveness and characterization","authors":"Pardis Mortazavi, Sodeif Azadmard-Damirchi, Zahra Piravi-Vanak, Omid Ahmadi, Navideh Anarjan, Fleming Martinez, Hoda Jafarizadeh-Malmiri","doi":"10.1515/gps-2023-0101","DOIUrl":"https://doi.org/10.1515/gps-2023-0101","url":null,"abstract":"Abstract The effect of microwave pretreatment and moisture levels of Camelina sativa seeds on the quality of extracted oil by cold press was investigated. The seed moistures were adjusted to 2.5%, 5.0%, 7.5%, and 10.0% and pretreated with microwaves for 0, 1, 2, and 3 min. Microwave pretreatment (3 min) of the seeds with 2.5% moisture increased the oil extraction yield by ∼11% compared to the control sample. The highest amount of acidity (0.564 g FFA·g −1 oil), peroxide value (2.4 meq O 2 ·kg −1 oil), carotenoid (5.26 mg·kg −1 oil), and browning index (0.710) were found in the oil extracted from seeds with 10% moisture and 3 min microwave pretreatment. The total phenolic compound was increased by microwave pretreatment but was mitigated by the seed moisture content, and the highest amount (208.24 mg caffeic acid·100 g −1 oil) was observed at 3 min microwave pretreatment of the seeds with 2.5% moisture. Chlorophyll content decreased by both microwave pretreatment and seed moisture content in camelina oil. Generally, the fatty acid composition of the extracted oils was not affected by the seed pretreatments. In conclusion, pretreatment of the camelina seeds before oil extraction is suggested to obtain a high oil extraction yield with a good quality oil.","PeriodicalId":12758,"journal":{"name":"Green Processing and Synthesis","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135262243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Globally, nanotechnology is generating significant interest because of its promise in a wide range of industries. The most commonly used nanoparticles are titanium dioxide nanoparticles (PF-127 coated TiO 2 NPs), which can be formulated with physical, chemical, and environmental factors. The establishment of an economical and environmentally beneficial method for its fabrication is due to increasing concerns about human health impacts. In this exploration, green Pluronic F-127 (PF-127) coated TiO 2 NPs using leaf extracts of Atractylodes macrocephala have been formulated and studied through various methods. PF-127 coated TiO 2 NPs were 60 nm large and a polygonal rutile-type crystalline structure was observed. Moreover, the NPs’ antimicrobial capacity against several pathogens was investigated. The cytotoxicity of the NPs against HEp-2, KB, and Vero cell lines was assessed using the MTT test. Increased antimicrobial potential of PF-127 coated TiO 2 NPs against several pathogens was noted. Furthermore, NPs displayed remarkable antioxidant activity, which increased with concentration. The NPs exhibited significant cytotoxic effects against HEp-2 and KB cell lines but failed to demonstrate toxicity against Vero cells. This is indicative of their cytotoxic potential against cancer cell lines and non-toxic nature towards healthy cells. This indicates that PF-127 coated TiO 2 NPs possess beneficial antimicrobial and antitumor properties.
{"title":"Synthesis and characterization of Pluronic F-127-coated titanium dioxide nanoparticles synthesized from extracts of <i>Atractylodes macrocephala</i> leaf for antioxidant, antimicrobial, and anticancer properties","authors":"Riyad A. Almaimani","doi":"10.1515/gps-2023-0100","DOIUrl":"https://doi.org/10.1515/gps-2023-0100","url":null,"abstract":"Abstract Globally, nanotechnology is generating significant interest because of its promise in a wide range of industries. The most commonly used nanoparticles are titanium dioxide nanoparticles (PF-127 coated TiO 2 NPs), which can be formulated with physical, chemical, and environmental factors. The establishment of an economical and environmentally beneficial method for its fabrication is due to increasing concerns about human health impacts. In this exploration, green Pluronic F-127 (PF-127) coated TiO 2 NPs using leaf extracts of Atractylodes macrocephala have been formulated and studied through various methods. PF-127 coated TiO 2 NPs were 60 nm large and a polygonal rutile-type crystalline structure was observed. Moreover, the NPs’ antimicrobial capacity against several pathogens was investigated. The cytotoxicity of the NPs against HEp-2, KB, and Vero cell lines was assessed using the MTT test. Increased antimicrobial potential of PF-127 coated TiO 2 NPs against several pathogens was noted. Furthermore, NPs displayed remarkable antioxidant activity, which increased with concentration. The NPs exhibited significant cytotoxic effects against HEp-2 and KB cell lines but failed to demonstrate toxicity against Vero cells. This is indicative of their cytotoxic potential against cancer cell lines and non-toxic nature towards healthy cells. This indicates that PF-127 coated TiO 2 NPs possess beneficial antimicrobial and antitumor properties.","PeriodicalId":12758,"journal":{"name":"Green Processing and Synthesis","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135007957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Silver nanoparticles (AgNPs) have been efficaciously synthesized from AgNO 3 via an easy and green method, also called green synthesis, using Mon Thong durian ( Durio zibethinus L.) rind extract. The inner shell of durian rind extract was used as an intermediary for the synthesis of AgNPs because the absorption spectra of the AgNP colloid extracted from the inner shell had a higher absorption than that of the outer shell. Additionally, we have found more fructose and glucose – which act as a reducing agent – and protein and carbohydrates – which act as the stabilizer – in a higher amount in the inner shell than the extract from the outer shell. The synthesized AgNPs were mainly spherical in shape and exhibited a relatively narrow size distribution with an average particle diameter of 10.2 ± 0.2 nm. In the reduction of hydrogen peroxide (H 2 O 2 ), these nanoparticles demonstrate catalytic activity. The degradation of AgNPs, including the catalytic decomposition of H 2 O 2 , causes a considerable change in the absorbance strength of the surface plasmon resonance band depending on the H 2 O 2 concentration. Over a broad concentration range of 10 −1 –10 −6 mol·L −1 H 2 O 2 , a good sensitivity and a linear response are achieved. This sensor’s quantification limit is found to be 0.9 µmol·L −1 H 2 O 2 . Therefore, this optical sensor for the detection of H 2 O 2 can be potentially applied in the determination of color indicators in medical or clinical diagnosis, biochemical analysis, and environmental applications.
{"title":"Green synthesis of silver nanoparticles using durian rind extract and optical characteristics of surface plasmon resonance-based optical sensor for the detection of hydrogen peroxide","authors":"Fueangfakan Chutrakulwong, Kheamrutai Thamaphat","doi":"10.1515/gps-2023-0070","DOIUrl":"https://doi.org/10.1515/gps-2023-0070","url":null,"abstract":"Abstract Silver nanoparticles (AgNPs) have been efficaciously synthesized from AgNO 3 via an easy and green method, also called green synthesis, using Mon Thong durian ( Durio zibethinus L.) rind extract. The inner shell of durian rind extract was used as an intermediary for the synthesis of AgNPs because the absorption spectra of the AgNP colloid extracted from the inner shell had a higher absorption than that of the outer shell. Additionally, we have found more fructose and glucose – which act as a reducing agent – and protein and carbohydrates – which act as the stabilizer – in a higher amount in the inner shell than the extract from the outer shell. The synthesized AgNPs were mainly spherical in shape and exhibited a relatively narrow size distribution with an average particle diameter of 10.2 ± 0.2 nm. In the reduction of hydrogen peroxide (H 2 O 2 ), these nanoparticles demonstrate catalytic activity. The degradation of AgNPs, including the catalytic decomposition of H 2 O 2 , causes a considerable change in the absorbance strength of the surface plasmon resonance band depending on the H 2 O 2 concentration. Over a broad concentration range of 10 −1 –10 −6 mol·L −1 H 2 O 2 , a good sensitivity and a linear response are achieved. This sensor’s quantification limit is found to be 0.9 µmol·L −1 H 2 O 2 . Therefore, this optical sensor for the detection of H 2 O 2 can be potentially applied in the determination of color indicators in medical or clinical diagnosis, biochemical analysis, and environmental applications.","PeriodicalId":12758,"journal":{"name":"Green Processing and Synthesis","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136028354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
K. Sivasubramanian, Shanmugam Sabarinathan, Moorthy Muruganandham, P. Velmurugan, N. Arumugam, A. Almansour, Raju Suresh Kumar, S. Sivakumar
Abstract The current research focuses on the silver nanoparticles (AgNPs) synthesis from the Cassia alata aqueous leaf extract. Various production parameters like pH (4, 5, 6, 7, 8, 9, and 10), metal ion concentration (1, 2, 3, 4, and 5 mM), and substrate (leaf extract) concentration (0.5, 1, 1.5, 2 and 2.5 mL) were optimized. UV-visible spectroscopy was used to identify the production by scanning the wavelength from 200 to 800 nm. Visual color change from light green to brown was designated as prior confirmation of the AgNP production. Physical characterization of AgNPs was carried out using scanning electron microscopy, Fourier-transform infrared spectroscopy, X-ray energy-dispersive spectroscopy, and X-ray diffraction. Furthermore, the obtained AgNPs show significant antibacterial activity for Staphylococcus aureus, Pseudomonas sp. Klebsiella sp., Proteus sp., and Enterobacter sp. The antioxidant potential was determined by α,α-diphenyl-β-picrylhydrazyl assay and cytotoxicity by (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) tetrazolium reduction assay on human lung cancer cell lines (A549). AgNPs confirmed potent antibacterial activity against skin infections, demonstrating their medicinal significance and are therefore crucial for creating a medicinal formulation with antibacterial properties.
{"title":"Antioxidant, antibacterial, and cytotoxicity potential of synthesized silver nanoparticles from the Cassia alata leaf aqueous extract","authors":"K. Sivasubramanian, Shanmugam Sabarinathan, Moorthy Muruganandham, P. Velmurugan, N. Arumugam, A. Almansour, Raju Suresh Kumar, S. Sivakumar","doi":"10.1515/gps-2023-0018","DOIUrl":"https://doi.org/10.1515/gps-2023-0018","url":null,"abstract":"Abstract The current research focuses on the silver nanoparticles (AgNPs) synthesis from the Cassia alata aqueous leaf extract. Various production parameters like pH (4, 5, 6, 7, 8, 9, and 10), metal ion concentration (1, 2, 3, 4, and 5 mM), and substrate (leaf extract) concentration (0.5, 1, 1.5, 2 and 2.5 mL) were optimized. UV-visible spectroscopy was used to identify the production by scanning the wavelength from 200 to 800 nm. Visual color change from light green to brown was designated as prior confirmation of the AgNP production. Physical characterization of AgNPs was carried out using scanning electron microscopy, Fourier-transform infrared spectroscopy, X-ray energy-dispersive spectroscopy, and X-ray diffraction. Furthermore, the obtained AgNPs show significant antibacterial activity for Staphylococcus aureus, Pseudomonas sp. Klebsiella sp., Proteus sp., and Enterobacter sp. The antioxidant potential was determined by α,α-diphenyl-β-picrylhydrazyl assay and cytotoxicity by (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) tetrazolium reduction assay on human lung cancer cell lines (A549). AgNPs confirmed potent antibacterial activity against skin infections, demonstrating their medicinal significance and are therefore crucial for creating a medicinal formulation with antibacterial properties.","PeriodicalId":12758,"journal":{"name":"Green Processing and Synthesis","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47083290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ayesha Talib, Shafiq Ali Shah, Muhammad Saeed Jan, Muhammad Zaeem Ahsan, Abubakr Munir, Ishfaq A. Bukhari, Halima Sadia, Taghrid S. Alomar, Najla AlMasoud, Abdur Rauf
Abstract Diabetes mellitus (DM) is one of the most challenging diseases among all the other diseases in the recent era, and it is a life-threatening disorder. The best enzymes to target for treating DM are α-glucosidase and α-amylase. For this purpose, we explored numerous succinimides with ketone functionalities. First, we explored these compounds for their in vitro analysis. Compounds 1 and 4 exhibited excellent inhibition of both enzymes in in vitro studies. These compounds displayed excellent activity with IC 50 values of 3.69 and 1.526 µg·mL −1 against the α-glucosidase enzyme. In the α-amylase inhibitory assay, compound 1 has shown excellent potential with an IC 50 value of 1.07 µg·mL −1 and compound 4 with an IC 50 value of 0.115 µg·mL −1 . Based on the in vitro analysis, the potent compounds were further subjected to their in vivo analysis. Before the in vivo analysis, the toxicity profile was checked, and it was confirmed that the compounds were safe at 1,500 µg·kg −1 . Then, these compounds were subjected for their in vivo anti-diabetic potential in a mouse model of diabetes. Various concentrations of compounds 1 and 4 were explored by in vivo analysis using glibenclamide as a standard drug. The blood glucose level of the tested and control groups was measured at 0 to 15 days accordingly. Similarly, we also explored compounds 1 and 4 for the oral glucose tolerance test at 0–120 min using glibenclamide as the standard drug. Hence, the succinimide having ketone moiety displayed excellent potential against diabetes.
{"title":"Exploration of ketone derivatives of succinimide for their antidiabetic potential: <i>In vitro</i> and <i>in vivo</i> approaches","authors":"Ayesha Talib, Shafiq Ali Shah, Muhammad Saeed Jan, Muhammad Zaeem Ahsan, Abubakr Munir, Ishfaq A. Bukhari, Halima Sadia, Taghrid S. Alomar, Najla AlMasoud, Abdur Rauf","doi":"10.1515/gps-2023-0103","DOIUrl":"https://doi.org/10.1515/gps-2023-0103","url":null,"abstract":"Abstract Diabetes mellitus (DM) is one of the most challenging diseases among all the other diseases in the recent era, and it is a life-threatening disorder. The best enzymes to target for treating DM are α-glucosidase and α-amylase. For this purpose, we explored numerous succinimides with ketone functionalities. First, we explored these compounds for their in vitro analysis. Compounds 1 and 4 exhibited excellent inhibition of both enzymes in in vitro studies. These compounds displayed excellent activity with IC 50 values of 3.69 and 1.526 µg·mL −1 against the α-glucosidase enzyme. In the α-amylase inhibitory assay, compound 1 has shown excellent potential with an IC 50 value of 1.07 µg·mL −1 and compound 4 with an IC 50 value of 0.115 µg·mL −1 . Based on the in vitro analysis, the potent compounds were further subjected to their in vivo analysis. Before the in vivo analysis, the toxicity profile was checked, and it was confirmed that the compounds were safe at 1,500 µg·kg −1 . Then, these compounds were subjected for their in vivo anti-diabetic potential in a mouse model of diabetes. Various concentrations of compounds 1 and 4 were explored by in vivo analysis using glibenclamide as a standard drug. The blood glucose level of the tested and control groups was measured at 0 to 15 days accordingly. Similarly, we also explored compounds 1 and 4 for the oral glucose tolerance test at 0–120 min using glibenclamide as the standard drug. Hence, the succinimide having ketone moiety displayed excellent potential against diabetes.","PeriodicalId":12758,"journal":{"name":"Green Processing and Synthesis","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135562229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Wiktoria Dubiel, Andrzej Kowalczyk, Aleksandra Jankowska, Marek Michalik, Włodzimierz Mozgawa, Marcin Kobielusz, Wojciech Macyk, Lucjan Chmielarz
Abstract Spherical Ti-MCM-41, synthetized by co-condensation method, presented very promising activity in catalytic and photocatalytic oxidation of diphenyl sulfide with H 2 O 2 to obtain diphenyl sulfoxide and diphenyl sulfone. Mesoporous silica materials with various titanium content were analyzed with respect to chemical composition (inductively coupled plasma optical emission spectrometry), structure properties (X-ray diffraction), textural properties (low-temperature N 2 adsorption–desorption), morphology (scanning electron microscopy), forms and aggregation introduced titanium species (diffuse reflectance spectroscopy, Raman spectroscopy), and surface acidity (NH 3 -TPD). Titanium introduced in the samples was present mainly in the form of highly dispersed species, presenting catalytic and photocatalytic activities in diphenyl sulfide oxidation with H 2 O 2 . Efficiency of the reaction increased with an increase in titanium loading in the samples and was significantly intensified under UV irradiation. The role of various Ti species in diphenyl sulfide oxidation was presented and discussed.
{"title":"Silica-titania mesoporous silicas of MCM-41 type as effective catalysts and photocatalysts for selective oxidation of diphenyl sulfide by H<sub>2</sub>O<sub>2</sub>","authors":"Wiktoria Dubiel, Andrzej Kowalczyk, Aleksandra Jankowska, Marek Michalik, Włodzimierz Mozgawa, Marcin Kobielusz, Wojciech Macyk, Lucjan Chmielarz","doi":"10.1515/gps-2023-0052","DOIUrl":"https://doi.org/10.1515/gps-2023-0052","url":null,"abstract":"Abstract Spherical Ti-MCM-41, synthetized by co-condensation method, presented very promising activity in catalytic and photocatalytic oxidation of diphenyl sulfide with H 2 O 2 to obtain diphenyl sulfoxide and diphenyl sulfone. Mesoporous silica materials with various titanium content were analyzed with respect to chemical composition (inductively coupled plasma optical emission spectrometry), structure properties (X-ray diffraction), textural properties (low-temperature N 2 adsorption–desorption), morphology (scanning electron microscopy), forms and aggregation introduced titanium species (diffuse reflectance spectroscopy, Raman spectroscopy), and surface acidity (NH 3 -TPD). Titanium introduced in the samples was present mainly in the form of highly dispersed species, presenting catalytic and photocatalytic activities in diphenyl sulfide oxidation with H 2 O 2 . Efficiency of the reaction increased with an increase in titanium loading in the samples and was significantly intensified under UV irradiation. The role of various Ti species in diphenyl sulfide oxidation was presented and discussed.","PeriodicalId":12758,"journal":{"name":"Green Processing and Synthesis","volume":"2018 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136004257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
T. Mutiara, M. Fahrurrozi, H. Sulistyo, M. Hidayat
Abstract Bacterial cellulose (BC) is a microbiologically produced cellulose with high purity and excellent biocompatibility, allowing it to be used alone or in combination with other materials, including polymers and nanoparticles. This study was conducted to incorporate silver nanoparticles (AgNPs) into a BC matrix using simple and environmentally friendly methods in order to create a composite with superior industrial properties. The fabricated composites were characterized with Fourier transform infrared, X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray (EDX), while the thermal stability was investigated by thermogravimetric analysis. The antimicrobial activity of the composites was determined by observing the formation of an inhibition zone during the incubation of Staphylococcus aureus (gram-positive) and Escherichia coli (gram-negative). The SEM, EDX, and XRD analysis confirmed the presence of AgNPs. The composites also exhibit excellent thermal stability and significant antimicrobial activity against S. aureus and E. coli.
{"title":"Green synthesis methods and characterization of bacterial cellulose/silver nanoparticle composites","authors":"T. Mutiara, M. Fahrurrozi, H. Sulistyo, M. Hidayat","doi":"10.1515/gps-2023-0067","DOIUrl":"https://doi.org/10.1515/gps-2023-0067","url":null,"abstract":"Abstract Bacterial cellulose (BC) is a microbiologically produced cellulose with high purity and excellent biocompatibility, allowing it to be used alone or in combination with other materials, including polymers and nanoparticles. This study was conducted to incorporate silver nanoparticles (AgNPs) into a BC matrix using simple and environmentally friendly methods in order to create a composite with superior industrial properties. The fabricated composites were characterized with Fourier transform infrared, X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray (EDX), while the thermal stability was investigated by thermogravimetric analysis. The antimicrobial activity of the composites was determined by observing the formation of an inhibition zone during the incubation of Staphylococcus aureus (gram-positive) and Escherichia coli (gram-negative). The SEM, EDX, and XRD analysis confirmed the presence of AgNPs. The composites also exhibit excellent thermal stability and significant antimicrobial activity against S. aureus and E. coli.","PeriodicalId":12758,"journal":{"name":"Green Processing and Synthesis","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45154640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Red elemental nano-selenium, which is an important biological form of selenium, exhibits very low toxicity and remarkable biological properties and thus has several positive effects. For instance, it shows antioxidation and antistress characteristics, promotes growth and improves immunity. However, owing to its nanoscale size, it is very difficult to disperse and stabilize during synthesis and storage. In this study, nanoscale selenium with a mass content of 2.06% and an average particle size of 49 nm was prepared by the chemical reduction method. The analysis demonstrated that the surface phospholipids formed lamellar structures after directional freezing, and the nano-selenium particles were distributed in the middle of the lamellar. The nano-selenium particles were efficiently dispersed due to their lamellar structure and amphiphilicity. The particles displayed excellent stability and remained relatively unchanged after 20 days of storage in solution or solid state. The difficulties associated with the dispersion and storage stability of nanometer selenium during preparation were solved.
{"title":"Synthesis and stability of phospholipid-encapsulated nano-selenium","authors":"Jinhui Huang, Xuegui Lin, Yongchuan Zhu, Xue-Ping Sun, Jiesheng Chen, Yingde Cui","doi":"10.1515/gps-2022-8100","DOIUrl":"https://doi.org/10.1515/gps-2022-8100","url":null,"abstract":"Abstract Red elemental nano-selenium, which is an important biological form of selenium, exhibits very low toxicity and remarkable biological properties and thus has several positive effects. For instance, it shows antioxidation and antistress characteristics, promotes growth and improves immunity. However, owing to its nanoscale size, it is very difficult to disperse and stabilize during synthesis and storage. In this study, nanoscale selenium with a mass content of 2.06% and an average particle size of 49 nm was prepared by the chemical reduction method. The analysis demonstrated that the surface phospholipids formed lamellar structures after directional freezing, and the nano-selenium particles were distributed in the middle of the lamellar. The nano-selenium particles were efficiently dispersed due to their lamellar structure and amphiphilicity. The particles displayed excellent stability and remained relatively unchanged after 20 days of storage in solution or solid state. The difficulties associated with the dispersion and storage stability of nanometer selenium during preparation were solved.","PeriodicalId":12758,"journal":{"name":"Green Processing and Synthesis","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44842857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Tayel, Nancy A. Elsayes, M. Zayed, M. Alsieni, Fuad A. Alatawi, A. I. Alalawy, Amany M. Diab
Abstract The fish-borne zoonotic bacteria may pose a risk to humans; nanobiotechnological techniques could serve as effective solutions for fighting them. The direct phycosynthesis of metals’ nanoparticles (NPs), silver (AgNPs), and selenium (SeNPs) using Corallina officinalis extract (CoE) was achieved. The construction of nanocomposites (NCs) from phycosynthesized NPs and nano-chitosan (NCht) was also accomplished to evaluate these entire compounds/NCs as antibacterial amalgams against fish-borne bacteria, Aeromonas hydrophila, Pseudomonas aeruginosa, Salmonella typhimurium, and Staphylococcus aureus. The entire agents/NCs were characterized and assessed. The structure and interactions of chemicals and NCs were determined using infrared analysis. CoE/AgNPs, CoE/SeNPs, NCht, NCht/CoE/AgNPs, and NCht/CoE/SeNPs had mean particles’ diameter of 5.52, 12.46, 59.81, 64.59, and 77.16 nm, respectively, which were confirmed by size studies and electron microscopy. The challenged bacteria were entirely susceptible to the inspected agents, using both qualitative and quantitative assays; S. aureus was more resistant, while A. hydrophila was the most sensitive strain. The NCs (NCht/CoE/AgNPs and NCht/CoE/SeNPs) have the utmost bactericidal potentialities, respectively; they exceeded the action of ampicillin. The total distortion, disintegration, and lysis of the treated A. hydrophila cells were highlighted by scanning imaging within 10 h of exposure. The conjugation of CoE-mediated NPs with NCht produced effective and harmless NCs, valid for applications to remove fish-borne pathogens with biosafe characteristics.
{"title":"Powerful antibacterial nanocomposites from Corallina officinalis-mediated nanometals and chitosan nanoparticles against fish-borne pathogens","authors":"A. Tayel, Nancy A. Elsayes, M. Zayed, M. Alsieni, Fuad A. Alatawi, A. I. Alalawy, Amany M. Diab","doi":"10.1515/gps-2023-0042","DOIUrl":"https://doi.org/10.1515/gps-2023-0042","url":null,"abstract":"Abstract The fish-borne zoonotic bacteria may pose a risk to humans; nanobiotechnological techniques could serve as effective solutions for fighting them. The direct phycosynthesis of metals’ nanoparticles (NPs), silver (AgNPs), and selenium (SeNPs) using Corallina officinalis extract (CoE) was achieved. The construction of nanocomposites (NCs) from phycosynthesized NPs and nano-chitosan (NCht) was also accomplished to evaluate these entire compounds/NCs as antibacterial amalgams against fish-borne bacteria, Aeromonas hydrophila, Pseudomonas aeruginosa, Salmonella typhimurium, and Staphylococcus aureus. The entire agents/NCs were characterized and assessed. The structure and interactions of chemicals and NCs were determined using infrared analysis. CoE/AgNPs, CoE/SeNPs, NCht, NCht/CoE/AgNPs, and NCht/CoE/SeNPs had mean particles’ diameter of 5.52, 12.46, 59.81, 64.59, and 77.16 nm, respectively, which were confirmed by size studies and electron microscopy. The challenged bacteria were entirely susceptible to the inspected agents, using both qualitative and quantitative assays; S. aureus was more resistant, while A. hydrophila was the most sensitive strain. The NCs (NCht/CoE/AgNPs and NCht/CoE/SeNPs) have the utmost bactericidal potentialities, respectively; they exceeded the action of ampicillin. The total distortion, disintegration, and lysis of the treated A. hydrophila cells were highlighted by scanning imaging within 10 h of exposure. The conjugation of CoE-mediated NPs with NCht produced effective and harmless NCs, valid for applications to remove fish-borne pathogens with biosafe characteristics.","PeriodicalId":12758,"journal":{"name":"Green Processing and Synthesis","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43967103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sayyed Ijazul Haq, Muhammad Nisar, Muhammad Zahoor, Muhammad Ikram, N. Islam, R. Ullah, Amal A Alotaibi
Abstract In the current research work, an attempt was made to synthesize silver nanoparticles (MA-AgNPs) utilizing the ripened fruit extract of Melia azedarach. Various characterization techniques such as UV-visible spectroscopic analysis, thermal gravimetric analysis (TGA), and scanning electron microscopy (SEM) were used to confirm the AgNPs synthesis. The bioreduction and color changes were tracked by UV-visible spectroscopy while SEM confirmed AgNPs of size 2–60 nm. TGA revealed the stability of the synthesized AgNPs. The antibacterial potential of the M. azedarach-based AgNPs and the fruit extract was assessed in terms of zone of inhibition (ZI), minimum bactericidal concentration, and minimum inhibitory concentration against tested bacterial strains where higher activity was noted for NPs (P. aeruginosa ZI = 22). The 2,2-diphenyl-1-picrylhydrazyl (DPPH) and (2,2-azinobis-[3-ethylbenzthiazoline]-6-sulfonic acid) (ABTS) assays revealed that NPs have significant antioxidant activities. The IC50 values recorded for extract was 340 and 350 μg·mL−1 against DPPH and ABTS whereas the corresponding values obtained for AgNPs were 40 and 58 μg·mL−1, respectively. The study suggests that the engineered NPs have promising biological activities compared to the parental extract, and thus could be used in drug designing as antibacterial and antioxidant agents; however, there should be further in vivo exploration in this regard before extending their uses to biological systems.
{"title":"Green fabrication of silver nanoparticles using Melia azedarach ripened fruit extract, their characterization, and biological properties","authors":"Sayyed Ijazul Haq, Muhammad Nisar, Muhammad Zahoor, Muhammad Ikram, N. Islam, R. Ullah, Amal A Alotaibi","doi":"10.1515/gps-2023-0029","DOIUrl":"https://doi.org/10.1515/gps-2023-0029","url":null,"abstract":"Abstract In the current research work, an attempt was made to synthesize silver nanoparticles (MA-AgNPs) utilizing the ripened fruit extract of Melia azedarach. Various characterization techniques such as UV-visible spectroscopic analysis, thermal gravimetric analysis (TGA), and scanning electron microscopy (SEM) were used to confirm the AgNPs synthesis. The bioreduction and color changes were tracked by UV-visible spectroscopy while SEM confirmed AgNPs of size 2–60 nm. TGA revealed the stability of the synthesized AgNPs. The antibacterial potential of the M. azedarach-based AgNPs and the fruit extract was assessed in terms of zone of inhibition (ZI), minimum bactericidal concentration, and minimum inhibitory concentration against tested bacterial strains where higher activity was noted for NPs (P. aeruginosa ZI = 22). The 2,2-diphenyl-1-picrylhydrazyl (DPPH) and (2,2-azinobis-[3-ethylbenzthiazoline]-6-sulfonic acid) (ABTS) assays revealed that NPs have significant antioxidant activities. The IC50 values recorded for extract was 340 and 350 μg·mL−1 against DPPH and ABTS whereas the corresponding values obtained for AgNPs were 40 and 58 μg·mL−1, respectively. The study suggests that the engineered NPs have promising biological activities compared to the parental extract, and thus could be used in drug designing as antibacterial and antioxidant agents; however, there should be further in vivo exploration in this regard before extending their uses to biological systems.","PeriodicalId":12758,"journal":{"name":"Green Processing and Synthesis","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46275668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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