Green Processing and Synthesis最新文献_第9页

The catalytic characteristics of 2-methylnaphthalene acylation with AlCl3 immobilized on Hβ as Lewis acid catalyst Hβ固定化AlCl3作为路易斯酸催化剂对2-甲基萘酰化反应的催化性能

IF 4.3 4区工程技术

Green Processing and Synthesis Pub Date : 2023-01-01 DOI: 10.1515/gps-2023-0003

Jingjing Sun, Haibo Jin, X. Mao, Guangxiang He, Junfang Li, Zihao Yan, Fating Hu, Lei Ma, Xiaoyan Guo, Suohe Yang

{"title":"The catalytic characteristics of 2-methylnaphthalene acylation with AlCl3 immobilized on Hβ as Lewis acid catalyst","authors":"Jingjing Sun, Haibo Jin, X. Mao, Guangxiang He, Junfang Li, Zihao Yan, Fating Hu, Lei Ma, Xiaoyan Guo, Suohe Yang","doi":"10.1515/gps-2023-0003","DOIUrl":"https://doi.org/10.1515/gps-2023-0003","url":null,"abstract":"Abstract The heterogeneous supported Lewis acid catalyst prepared by immobilization technology has high reaction activity. It is an environment-friendly catalyst. Using Lewis acid immobilized as the catalyst, 2-methyl-6-propionyl naphthalene is synthesized by Friedel–Crafts reaction with 2-methylnaphthalene and propionic anhydride, which has a good development prospect. A variety of AlCl3 catalysts supported by H-zeolite molecular sieves are prepared using the solvent reflux method in the paper. It is found that AlCl3/Hβ has better catalytic performance. The results showed that AlCl3/Hβ catalyst is mainly composed of L acid. The acid content of B acid and the specific surface area increase, and the pore volume and pore size decreases. With the increase in AlCl3 concentration, the acid content of strong acid, medium strong acid, and weak acid increases, but the solubility of AlCl3 in CHCl3 is limited. When the concentration of AlCl3 is too high, too much AlCl3 is deposited on the surface of the molecular sieve, which is useless to its binding with Si–OH. AlCl3/Hβ’s activity is higher when the concentration of AlCl3 is 3 g·L−1, and the solvent is refluxed for 8 h and calcined at 550°C for 3 h. Under these conditions, the conversion of 2-methylnaphthalene is 85.86%, and the yield of β,β-methyl propyl naphthalene is increased to 81.19%.","PeriodicalId":12758,"journal":{"name":"Green Processing and Synthesis","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43367958","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}

引用次数: 0

Antibacterial wound dressing with hydrogel from chitosan and polyvinyl alcohol from the red cabbage extract loaded with silver nanoparticles 壳聚糖水凝胶和负载银纳米粒子的红甘蓝提取物聚乙烯醇抗菌伤口敷料

IF 4.3 4区工程技术

Green Processing and Synthesis Pub Date : 2023-01-01 DOI: 10.1515/gps-2023-0035

Kumaravel Kaliaperumal, K. Subramanian, R. Thirunavukkarasu, Ramesh Kumar Varadharajan, Reem Binsuwaidan, N. Alabdallah, N. Alshammari, Mohd Saeed, K. Anbarasu, R. Karunakaran

{"title":"Antibacterial wound dressing with hydrogel from chitosan and polyvinyl alcohol from the red cabbage extract loaded with silver nanoparticles","authors":"Kumaravel Kaliaperumal, K. Subramanian, R. Thirunavukkarasu, Ramesh Kumar Varadharajan, Reem Binsuwaidan, N. Alabdallah, N. Alshammari, Mohd Saeed, K. Anbarasu, R. Karunakaran","doi":"10.1515/gps-2023-0035","DOIUrl":"https://doi.org/10.1515/gps-2023-0035","url":null,"abstract":"Abstract The aim of the present study was the synthesis of hydrogel incorporated with chitosan blend with polyvinyl alcohol (PVA) from red cabbage Brassica oleracea and its application in wound healing and antibacterial activity. The chitosan/PVA hydrogel was synthesized by the combination of chitosan and PVA treated with acetic acid. The silver nanoparticles (AgNPs) were synthesized from the B. oleracea extract and its antibacterial efficacy was examined. The synthesized nanoparticles (NPs) were characterized using UV-spectroscopy and X-ray diffraction methods. The synthesized NPs were purified and combined with the hydrogel. This combined hydrogel and AgNP mixture was then subjected to Fourier transform infrared analysis, and the results were observed to conclude the effectiveness of the hydrogel. This hydrogel would differ in the part of dressing the wound, that is it can last on the wound for a longer period, thus reducing the pain and frequency of dressing and in turn naturally healing the wound in less time.","PeriodicalId":12758,"journal":{"name":"Green Processing and Synthesis","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44632757","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}

引用次数: 1

Phytofabrication, characterization, and evaluation of novel bioinspired selenium–iron (Se–Fe) nanocomposites using Allium sativum extract for bio-potential applications 利用大蒜提取物制备新型生物激发硒-铁(Se-Fe)纳米复合材料的制备、表征和评价

4区工程技术

Green Processing and Synthesis Pub Date : 2023-01-01 DOI: 10.1515/gps-2023-0049

Tahira Sultana, Khafsa Malik, Naveed Iqbal Raja, None Sohail, Asma Hameed, Amir Ali, Zia-ur-Rehman Mashwani, Muhammad Yousuf Jat Baloch, Abdulwahed Fahad Alrefaei

{"title":"Phytofabrication, characterization, and evaluation of novel bioinspired selenium–iron (Se–Fe) nanocomposites using Allium sativum extract for bio-potential applications","authors":"Tahira Sultana, Khafsa Malik, Naveed Iqbal Raja, None Sohail, Asma Hameed, Amir Ali, Zia-ur-Rehman Mashwani, Muhammad Yousuf Jat Baloch, Abdulwahed Fahad Alrefaei","doi":"10.1515/gps-2023-0049","DOIUrl":"https://doi.org/10.1515/gps-2023-0049","url":null,"abstract":"Abstract Green nano-chemistry is an advanced research route covering eco-friendly fabrication approaches for synthesizing bimetallic nanocomposites (NCs) to enhance their therapeutic properties. The current study aims to phytofabrication, characterization, and bio-potential evaluation of novel selenium–iron (Se–Fe) NCs by utilizing garlic extract. The morphological and physicochemical features of Se–Fe NCs were evaluated by UV–visible spectroscopy, scanning electron microscopy, energy-dispersive X-ray, Fourier transform infrared, X-ray diffraction, and Zeta potential analysis. The findings showed that garlic cloves extract was a promising capping and reducing agent for the formulation of the NC. To explore the antioxidant potential of a bioinspired Se–Fe NC, 2,2-diphenyl-1-picrylhydrazyl and reducing power assays were performed. Furthermore, antioxidant efficacy was confirmed through antimicrobial activities against clinical pathogens. Phytosynthesized Se–Fe NCs (25, 50, 75, and 100 ppm) showed a dose-dependent response. Higher concentrations of Se–Fe NCs impose a more potent antioxidant and antimicrobial potential. The astonishing findings suggest that phytochemicals in Allium sativum extract are useful reducing agents in the formulation of well-defined Se–Fe NCs, and such NCs could act as competitive inhibitors against pathogens. To the extent of our understanding, Se–Fe NC is the first time synthesized and demonstrates the distinctiveness of green chemistry and will give multifunctional applications in nano-biotechnology.","PeriodicalId":12758,"journal":{"name":"Green Processing and Synthesis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135103406","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}

引用次数: 1

Highly efficient removal of tetracycline and methyl violet 2B from aqueous solution using the bimetallic FeZn-ZIFs catalyst 双金属FeZn-ZIFs催化剂对水溶液中四环素和甲基紫2B的高效去除

4区工程技术

Green Processing and Synthesis Pub Date : 2023-01-01 DOI: 10.1515/gps-2023-0122

Thu T. A. Le, Bao H. Dang, Thanh Q. C. Nguyen, Dam P. Nguyen, Giao H. Dang

{"title":"Highly efficient removal of tetracycline and methyl violet 2B from aqueous solution using the bimetallic FeZn-ZIFs catalyst","authors":"Thu T. A. Le, Bao H. Dang, Thanh Q. C. Nguyen, Dam P. Nguyen, Giao H. Dang","doi":"10.1515/gps-2023-0122","DOIUrl":"https://doi.org/10.1515/gps-2023-0122","url":null,"abstract":"Abstract Residual antibiotics and organic dyes in wastewater have gained the current challenge all over the world because of their toxicity to humans and the environment. In this study, the bimetallic porous FeZn-ZIFs materials were successfully prepared under mild conditions at room temperature and atmospheric pressure and characterized by various techniques. The FeZn-ZIFs were used as a heterogeneous catalyst to remove tetracycline antibiotics (TC) and methyl violet 2B dyes (MV) in an aqueous solution by activating peroxymonosulfate (PMS) and peroxydisulfate (PDS), respectively. The catalytic activity of FeZn-ZIFs towards TC and MV under different oxidant dosages, the catalyst dosage, the initial pollutant concentration, contact time, and reaction temperature were optimized. The results indicated that FeZn-ZIFs was an efficient catalyst for removing TC and MV based on advanced oxidant processes, having a removal capacity of 92% at TC concentration of 50 mg·L −1 and 95% MV concentration of 20 mg·L −1 . More importantly, this bimetallic catalyst was identified the superior structural stability when the removal efficiency of TC and MV was maintained at approximately 90% after five cycles. In short, the FeZn-ZIFs and PMS/PDS system exhibited a promising application prospect for antibiotic and dye-containing wastewater treatment.","PeriodicalId":12758,"journal":{"name":"Green Processing and Synthesis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135508750","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}

引用次数: 0

Exploration of ketone derivatives of succinimide for their antidiabetic potential: In vitro and in vivo approaches 琥珀酰亚胺酮衍生物抗糖尿病潜能的探索:体外和体内方法

4区工程技术

Green Processing and Synthesis Pub Date : 2023-01-01 DOI: 10.1515/gps-2023-0103

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

{"title":"Exploration of ketone derivatives of succinimide for their antidiabetic potential: In vitro and in vivo 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":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"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}

引用次数: 0

Silica-titania mesoporous silicas of MCM-41 type as effective catalysts and photocatalysts for selective oxidation of diphenyl sulfide by H₂O₂ MCM-41型二氧化硅-二氧化钛介孔二氧化硅作为H2O2选择性氧化二苯基硫化物的有效催化剂和光催化剂

4区工程技术

Green Processing and Synthesis Pub Date : 2023-01-01 DOI: 10.1515/gps-2023-0052

Wiktoria Dubiel, Andrzej Kowalczyk, Aleksandra Jankowska, Marek Michalik, Włodzimierz Mozgawa, Marcin Kobielusz, Wojciech Macyk, Lucjan Chmielarz

{"title":"Silica-titania mesoporous silicas of MCM-41 type as effective catalysts and photocatalysts for selective oxidation of diphenyl sulfide by H2O2","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":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"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}

引用次数: 0

Geranium leaf-mediated synthesis of silver nanoparticles and their transcriptomic effects on Candida albicans 天竺葵叶介导的纳米银合成及其对白色念珠菌的转录组效应

IF 4.3 4区工程技术

Green Processing and Synthesis Pub Date : 2023-01-01 DOI: 10.1515/gps-2022-8105

P. Serrano-Díaz, D. Williams, J. Vega-Arreguín, Ravichandran Manisekaran, Joshua A. Twigg, Daniel Morse, R. García-Contreras, M. C. Arenas-Arrocena, L. Acosta-Torres

{"title":"Geranium leaf-mediated synthesis of silver nanoparticles and their transcriptomic effects on Candida albicans","authors":"P. Serrano-Díaz, D. Williams, J. Vega-Arreguín, Ravichandran Manisekaran, Joshua A. Twigg, Daniel Morse, R. García-Contreras, M. C. Arenas-Arrocena, L. Acosta-Torres","doi":"10.1515/gps-2022-8105","DOIUrl":"https://doi.org/10.1515/gps-2022-8105","url":null,"abstract":"Abstract Candida albicans is the most predominant fungal species isolated from medical devices, including catheters, heart valves, and dental prostheses. In recent years, it has been demonstrated to be resistant to many antifungals; therefore, silver nanoparticles (AgNPs) have been proposed as an alternative. But only a handful of research is contributed to omic-based studies to study the various impacts of AgNPs on Candida species and other microorganisms. Thus, the study aims to biosynthesize AgNPs using Pelargonium-hortorum leaf and test its antifungal, cytotoxicity, and global gene expression on Candida through transcriptomic profiling. The leaf-assisted AgNPs resulted in spherical shapes with a particle size of 38 nm. The anticandidal effect demonstrated that the Minimum inhibitory concentration was 25 μg·mL−1. Later, the cytotoxicity assay reported a moderate impact on the human gingival fibroblast cells. Finally, the transcriptomic analysis demonstrated the differential gene expression of 3,871 upregulated and 3,902 downregulated genes. Thus, proving the anticandidal effect of AgNPs on Candida through RNA-seq experiments and the regulated genes is highly important to cell wall integrity, adherence, and virulence.","PeriodicalId":12758,"journal":{"name":"Green Processing and Synthesis","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46807287","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}

引用次数: 2

Rapid synthesis of copper nanoparticles using Nepeta cataria leaves: An eco-friendly management of disease-causing vectors and bacterial pathogens 利用卡塔叶快速合成铜纳米颗粒：对致病媒介和细菌病原体的环保管理

IF 4.3 4区工程技术

Green Processing and Synthesis Pub Date : 2023-01-01 DOI: 10.1515/gps-2023-0022

M. Mani, Aruna Sharmili Sundararaj, K. Al-Ghanim, Shiny Punalur John, K. Elumalai, M. Nicoletti, M. Govindarajan

{"title":"Rapid synthesis of copper nanoparticles using Nepeta cataria leaves: An eco-friendly management of disease-causing vectors and bacterial pathogens","authors":"M. Mani, Aruna Sharmili Sundararaj, K. Al-Ghanim, Shiny Punalur John, K. Elumalai, M. Nicoletti, M. Govindarajan","doi":"10.1515/gps-2023-0022","DOIUrl":"https://doi.org/10.1515/gps-2023-0022","url":null,"abstract":"Abstract Insecticides kill mosquitoes but damage other animals including humans. Eco-friendly metal nanoparticles may be a plant-based pesticide for vector control. Here, the copper nanoparticles (Cu NPs) synthesized from Nepeta catarialeaves have been investigated for their antibacterial and larvicidal properties. Fourier transforms infrared spectroscopy demonstrated that biochemicals reduced and stabilized nanoparticles by shifting peaks from 1,049 to 1,492 cm−1, and ultraviolet–visible spectrometry proved that produced Cu NPs had a peak at 550 nm. Transmission electron microscopic and scanning electron microscope showed that the particles are spherical and 23–29 nm in size. X-ray diffraction analysis shows that Cu NPs are crystalline. At a 100 µg·mL−1 concentration, Cu NPs exhibited a higher percentage of inhibition in the order of Escherichia coli ≫ Enterococcus faecalis ≫ Staphylococcus aureus. The lethal concentration (LC50) of the Cu NPs against the larvae of Aedes aegypti, Anopheles stephensi, and Culex quinquefasciatus was determined to be 60.63, 56.58, and 54.32 µg·mL−1, respectively. This ground-breaking study describes the biological production of Cu NPs utilizing N. cataria leaf extract for the first time. Based on these findings, the bio-synthesized Cu NPs and the aqueous extract of N. cataria may provide a potential alternative method for managing these vector populations. Graphical abstract","PeriodicalId":12758,"journal":{"name":"Green Processing and Synthesis","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49230306","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}

引用次数: 1

The experimental study on the air oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid with Co–Mn–Br system Co-Mn-Br体系空气氧化5-羟甲基糠醛制2,5-呋喃二羧酸的实验研究

4区工程技术

Green Processing and Synthesis Pub Date : 2023-01-01 DOI: 10.1515/gps-2023-0116

Linrun Li, Suohe Yang, Haibo Jin, Guangxiang He, Xiaoyan Guo, Lei Ma

{"title":"The experimental study on the air oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid with Co–Mn–Br system","authors":"Linrun Li, Suohe Yang, Haibo Jin, Guangxiang He, Xiaoyan Guo, Lei Ma","doi":"10.1515/gps-2023-0116","DOIUrl":"https://doi.org/10.1515/gps-2023-0116","url":null,"abstract":"Abstract 2,5-Furandicarboxylic acid (FDCA), an eco-friendly biomass resource capable of replacing petroleum-based fuels, is gaining increasing popularity. In this article, 2,5-FDCA was prepared by liquid-phase oxidation of the sustainable precursor 5-hydroxymethylfurfural using the Co–Mn–Br catalyst system. The effects of catalyst concentration, catalyst ratio, reaction temperature, reaction time, reaction pressure, and solvent ratio on the reaction of FDCA were investigated. The products are subjected to qualitative and quantitative analyses using high-performance liquid chromatography, infrared spectroscopy, and hydrogen nuclear magnetic spectroscopy. Moreover, considering the loss of catalytic liquid, the suitable reaction conditions were determined as follows: n (Co)/ n (Mn)/ n (Br) = 1/0.04/0.5, n (HMF)/ n (HAC) = 0.05, reaction temperature of 170°C, reaction pressure of 2 MPa, reaction time 40 min, and airflow rate 1.0 L·min −1 . Under these conditions, the yield of the product is 86.01%, the purity is 97.53%, and the loss of the catalytic liquid is about 5.63%, which is at an ideal level and provides a good basis for the recovery of the subsequent catalytic liquid and multiple cycle reactions. Through the optimization of the existing process, the use of noble metal catalysts has been reduced, and the recycling of catalytic liquid has also reduced the consumption of catalysts. This advancement marks a significant stride toward sustainable development in the green chemical industry.","PeriodicalId":12758,"journal":{"name":"Green Processing and Synthesis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135507269","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}

引用次数: 0

A thermo-tolerant cellulase enzyme produced by Bacillus amyloliquefaciens M7, an insight into synthesis, optimization, characterization, and bio-polishing activity 一种由解淀粉芽孢杆菌M7产生的耐热纤维素酶，对合成、优化、表征和生物抛光活性的深入研究

4区工程技术

Green Processing and Synthesis Pub Date : 2023-01-01 DOI: 10.1515/gps-2023-0127

Amr Fouda, Khalid Sulaiman Alshallash, Hossam Mohamed Atta, Mamdouh Salem El-Gamal, Mohamed Mostafa Bakry, Mohammed Ibrahim Alghonaim, Salem Salah Salem

{"title":"A thermo-tolerant cellulase enzyme produced by Bacillus amyloliquefaciens M7, an insight into synthesis, optimization, characterization, and bio-polishing activity","authors":"Amr Fouda, Khalid Sulaiman Alshallash, Hossam Mohamed Atta, Mamdouh Salem El-Gamal, Mohamed Mostafa Bakry, Mohammed Ibrahim Alghonaim, Salem Salah Salem","doi":"10.1515/gps-2023-0127","DOIUrl":"https://doi.org/10.1515/gps-2023-0127","url":null,"abstract":"Abstract In the current study, among 36 isolates, the bacterial strain M7 was selected as the highest cellulase producer and underwent traditional and molecular identification as Bacillus amyloliquefaciens M7. The productivity of the cellulase enzyme was optimized using the one-factor-at-a-time method. The optimization analysis showed that the best pH value for cellulase production was 7, in the presence of 1% bacterial inoculum size, 5 g·L −1 of carboxymethyl cellulose, 5 g·L −1 of peptone as nitrogen source, and incubation period of 24 h at a temperature of 35°C. The highest cellulase activity (64.98 U·mL −1 ) was obtained after optimizing conditions using BOX-Behnken Design. The maximum cellulase yield (75.53%) was obtained after precipitation by 60% ammonium sulfate, followed by purification by dialysis bag and Sephadex G-100 column chromatography. The purified cellulase enzyme was characterized by 6.38-fold enrichment, with specific activity (60.54 U·mg −1 ), and molecular weight of approximately 439.0 Da. The constituent of purified cellulase was 18 amino acids with high concentrations of 200 and 160 mg·L −1 for glycine and arginine, respectively. The purified cellulase enzyme was more stable and active at pH 8 and an incubation temperature of 50°C. The metal ions CaCl 2 , NaCl, and ZnO enhanced the activity of purified cellulase enzyme. Finally, the B. amyloliquefaciens M7-cellulase exhibits high bio-polishing activity of cotton fabrics with low weight loss (4.3%) which was attained at a maximum concentration (1%, v/v) for 90 min.","PeriodicalId":12758,"journal":{"name":"Green Processing and Synthesis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135559969","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}

引用次数: 0