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Green fabrication of chitosan from marine crustaceans and mushroom waste: Toward sustainable resource utilization 海洋甲壳类和蘑菇废弃物绿色制备壳聚糖:迈向资源可持续利用
4区 工程技术 Q1 Engineering Pub Date : 2023-01-01 DOI: 10.1515/gps-2023-0093
Kiruthiga Periyannan, Hemamala Selvaraj, Balachandar Subbu, Muthukrishnan Pallikondaperumal, Ponmurugan Karuppiah, Jothi Ramalingam Rajabathar, Hamad Al-Lohedan, Sadhasivam Thangarasu
Abstract The exoskeletons of crabs, shrimp, and fish are major waste. These wastes contain chitin, an abundant natural polymer found next to cellulose. Thus, disposal of this waste becomes a huge problem for the environment; besides this, reutilization boosts the circular economy. Chitin is partially deacetylated to yield the economically useful product of chitosan and is a heteropolymer. The current study isolated chitosan from mushrooms and various marine crustaceans, i.e., crabs, shrimp, and fish. Chitosan was extracted from marine crustaceans by demineralization, deproteination, and deacetylation. Later, extracted chitosan was characterized by physicochemical characteristics like deacetylation degree, ash content, protein, color, fat-binding capacity (FBC), water-binding capacity (WBC), pH, and moisture content. The result showed that chitosan yield ranges from 13.0% to 17.0%, the degree of deacetylation range from 82.0% to 85.0%, ash content range from 0.8% to 3.0%, and protein content is below 1.0%. The FBC and WBC range between 320% and 444% and 535% and 602%, respectively. The pH and moisture content range from 7.4 to 8.0 and from 2.0% to 4.0%, respectively. Overall, results specified that crustacean waste was an exceptional chitosan source with availability and production consistency.
蟹、虾、鱼的外骨骼是主要的废弃物。这些废物中含有几丁质,一种在纤维素旁边发现的丰富的天然聚合物。因此,处理这些废物成为一个巨大的环境问题;除此之外,再利用促进了循环经济。甲壳素经部分去乙酰化,得到经济上有用的壳聚糖,是一种杂聚物。目前的研究从蘑菇和各种海洋甲壳类动物,即螃蟹、虾和鱼中分离出壳聚糖。以海洋甲壳类动物为原料,通过脱矿、脱蛋白、脱乙酰等工艺提取壳聚糖。对提取的壳聚糖进行脱乙酰度、灰分、蛋白质、颜色、脂肪结合体(FBC)、水结合体(WBC)、pH和水分含量等理化特性表征。结果表明,壳聚糖得率为13.0% ~ 17.0%,脱乙酰度为82.0% ~ 85.0%,灰分含量为0.8% ~ 3.0%,蛋白质含量在1.0%以下。FBC和WBC分别在320% - 444%和535% - 602%之间。pH值为7.4 ~ 8.0,水分含量为2.0% ~ 4.0%。总的来说,结果表明甲壳类动物废物是一种特殊的壳聚糖来源,具有可用性和产量一致性。
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引用次数: 0
Novel in situ synthesis of quaternary core–shell metallic sulfide nanocomposites for degradation of organic dyes and hydrogen production 新型原位合成用于降解有机染料和制氢的四元核壳金属硫化物纳米复合材料
IF 4.3 4区 工程技术 Q1 Engineering Pub Date : 2023-01-01 DOI: 10.1515/gps-2022-8128
Y. Khan, Uzma Sharafat, S. Gul, M. I. Khan, M. Ismail, M. Khan, Rafia Younus, Sher Bahadar Khan
Abstract Environmental remediation of toxic organic pollutants on catalytic degradation has gained much attention. Organic dyes and fossil fuels as pollutants are the two major problems nowadays. The efficient and targeted eradication of organic dye from water systems is a critical global concern for the treatment of both drinking water and wastewater. In this study, ZnO–ZnS–CdO–CdS quaternary core–shell nanocomposites (NCs) were synthesized using Ricinus communis as a stabilizing agent and hydrazine hydrate as a reducing agent. UV-visible spectroscopy and photoluminescence confirmed the formation of NCs. Fourier transform infrared spectroscopy confirmed the presence of functional groups, while scanning electron microscopy analysis revealed that the morphology of nanomaterials was spherical and poly distributed. X-ray powder diffraction confirmed the crystalline nature of prepared samples. The prepared nanocatalysts were used in the production of hydrogen gas from green sources of the Brassica campestris leaf extract and the degradation of Congo red and methyl red dyes. Overall, the photocatalytic performance of NCs and their design was successful. The prepared catalysts were not only active in the degradation of a single substrate but also in the degradation of a mixture of dyes.
摘要环境修复中有毒有机污染物的催化降解已受到广泛关注。有机染料和化石燃料作为污染物是当今的两大问题。有效和有针对性地从水系统中清除有机染料是全球饮用水和废水处理的一个关键问题。以蓖麻为稳定剂,水合肼为还原剂,合成了ZnO-ZnS-CdO-CdS四元核壳纳米复合材料。紫外可见光谱和光致发光证实了nc的形成。傅里叶变换红外光谱证实了官能团的存在,扫描电镜分析显示纳米材料的形貌呈球形和多聚分布。x射线粉末衍射证实了制备样品的结晶性质。将所制备的纳米催化剂应用于油菜叶提取物绿色源制氢及刚果红和甲基红染料的降解。总的来说,纳米碳纳米管的光催化性能及其设计是成功的。所制备的催化剂不仅对单一底物的降解有活性,而且对混合染料的降解也有活性。
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引用次数: 1
Microfluidic steam-based synthesis of luminescent carbon quantum dots as sensing probes for nitrite detection 基于微流体蒸汽合成发光碳量子点作为检测亚硝酸盐的传感探针
IF 4.3 4区 工程技术 Q1 Engineering Pub Date : 2023-01-01 DOI: 10.1515/gps-2022-8144
Xiangmiao Zhu, Weitong Qi, Mi Wang, Shixuan Zhan, Xuezhao Liu, Yuting Zhao, V. Hessel, Zhanghao Chen, Liangliang Lin
Abstract In this work, an efficient and green approach has been presented to prepare carbon quantum dots (CQDs) from watermelon juice through a microfluidic steam-based method, with a view to enabling continuous production at scale, i.e., to save time, costs, or energy as compared to conventional production using an autoclave. The evolution of the product formation through multifarious intermediates generated in different stages of the reaction process was characterized. Computational fluid dynamics simulations reveal the pressure and velocity profiles in the microchannel to exert process control. These determine the quality of the obtained CQDs by influencing the particle size transformations and manifold chemicals along the microchannel axis. The optimal reaction conditions and reaction mechanism for the synthesis of CQDs were investigated. Additionally, the synthesized CQDs demonstrated good fluorescence properties as well as a specific response to NO 2 − {text{NO}}_{2}^{-} in both fluorescence and spectrophotometric modes, providing great potential for their application in environmental monitoring.
摘要在这项工作中,提出了一种高效、绿色的方法,通过基于微流体蒸汽的方法从西瓜汁中制备碳量子点(CQD),以实现大规模的连续生产,即与使用高压釜的传统生产相比,节省时间、成本或能源。表征了在反应过程的不同阶段产生的各种中间体对产物形成的演变。计算流体动力学模拟揭示了微通道中施加过程控制的压力和速度分布。这些通过影响沿微通道轴的颗粒尺寸转变和多种化学物质来确定所获得的CQD的质量。研究了合成CQDs的最佳反应条件和反应机理。此外,合成的CQD在荧光和分光光度模式下都表现出良好的荧光性质以及对NO2−{text{NO}}_{2}^{-}的特异性响应,为其在环境监测中的应用提供了巨大的潜力。
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引用次数: 0
Green synthesis of Kickxia elatine-induced silver nanoparticles and their role as anti-acetylcholinesterase in the treatment of Alzheimer’s disease Kickxia elatine诱导的银纳米粒子的绿色合成及其抗乙酰胆碱酯酶作用
IF 4.3 4区 工程技术 Q1 Engineering Pub Date : 2023-01-01 DOI: 10.1515/gps-2023-0060
N. Huda, H. Ghneim, Fozia Fozia, Mushtaq Ahmed, N. Mushtaq, N. Sher, Rahmattualh Khan, Ijaz Ahmad, Y. Al-Sheikh, J. Giesy, M. A. Aboul-Soud
Abstract The synthesis of silver nanoparticles (AgNPs) by the green method is favored as compared to chemical synthesis due to their appreciable properties of less toxicity and simple synthesis. The current study designed the biosynthesis of AgNPs in one step by using the plant Kickxia elatine (KE) extract and then investigated its inhibiting activity against rat’s brain acetylcholinesterase (AChE) ex vivo. Ultraviolet spectrum at 416 nm confirmed the formation of AgNPs. X-ray diffractometer calculated size was reported to be 42.47 nm. The SEM analysis confirmed spherical-shaped AgNPs. FT-IR suggested that the phytochemical groups present in the KE extract and their nanoparticles (NPs) are responsible for the biosynthesized of NPs. EDX analysis presented that Ag was the chief element with 61.67%. Both KE extract and AgNPs showed significant anti-AChE activity at 175 µg·mL−1. Statistical analysis showed that both KE and AgNPs exhibited non-competitive type inhibition against AChE, i.e. V max decreased (34.17–68.64% and 22.29–62.10%), while K m values remained constant. It is concluded that KE and AgNPs can be considered an inhibitor of rats’ brain AChE. Furthermore, the synthesis of AgNP-based drugs can be used as a cheaper and alternative option against diseases such as Alzheimer’s disease.
摘要与化学合成相比,绿色合成银纳米粒子具有毒性小、合成简单等优点。本研究设计了以植物叶黄素(KE)提取物为原料一步合成AgNPs的方法,并在体外研究了其对大鼠脑乙酰胆碱酯酶(AChE)的抑制作用。416 nm的紫外光谱证实了AgNPs的形成。x射线衍射计计算尺寸为42.47 nm。SEM分析证实为球形AgNPs。傅里叶红外光谱(FT-IR)表明,KE提取物及其纳米颗粒(NPs)中的植物化学基团参与了NPs的生物合成。EDX分析表明,Ag为主要元素,占61.67%。在175µg·mL−1浓度下,KE提取物和AgNPs均表现出显著的抗ache活性。统计分析表明,KE和AgNPs对AChE均表现出非竞争性抑制,即vmax降低(34.17 ~ 68.64%),而K m值保持不变。综上所述,KE和AgNPs可被认为是大鼠脑AChE的抑制剂。此外,合成基于agnp的药物可以作为一种更便宜的替代方案,用于治疗阿尔茨海默病等疾病。
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引用次数: 1
Characterization of bio-oil production by microwave pyrolysis from cashew nut shells and Cassia fistula pods 微波热解腰果壳和决明果豆荚制备生物油的研究
IF 4.3 4区 工程技术 Q1 Engineering Pub Date : 2023-01-01 DOI: 10.1515/gps-2023-0084
Ratima Waitongkham, Y. Pianroj, Teerasak Punvichai, S. Karrila, P. Chumkaew, Saysunee Jumrat
Abstract In this study, the production of bio-oil by pyrolysis with microwave (MW) heating was tested experimentally. Two magnetrons with a total MW power of 1,600 W were used in the pyrolysis setup. The electric field strength was 185.38 V·m−2 at an MW frequency of 2.45 GHz. Cashew nut shells (CNS) or Cassia fistula pods (CFP) were pyrolyzed at 400°C, 500°C, or 600°C, with biomass-to-activated carbon ratio set at 70:30, 80:20, or 90:10. The largest yield of bio-oil was found for CNS at 600°C, and for CFP at 500°C, both with 90:10 ratio, achieving, respectively, 20.0% and 15.8% yields. When the bio-oil yields from CNS and CFP at 90:10 ratio and 400–600°C were analyzed with gas chromatograph-mass spectrometer, the components found included acids, esters, ketones, furans, pyrans, guaiacol, syringol and phenols, and phenolic derivatives were the dominant type of compounds. There were 23.56% and 13.23% phenolic derivatives, respectively, in the bio-oils from CNS (at 500°C) and from CFP (at 400°C). An analysis with Folin–Ciocalteu reagent of the phenolic contents in bio-oils gave the respective ranges 146.83–164.83 mg·GAE·g·DW−1 and 39.34–45.91 mg·GAE·g DW−1 for CNS and CFP (both run with 90:10 ratio).
摘要本研究对微波加热热解生产生物油进行了实验研究。两个总功率为1,600 W的磁控管用于热解装置。在2.45 GHz的MW频率下,电场强度为185.38 V·m−2。在400°C, 500°C或600°C的条件下,将腰果壳(CNS)或决明子瘘管荚(CFP)热解,生物质与活性炭的比例设置为70:30,80:20或90:10。CNS在600°C和CFP在500°C时的生物油收率最高,两者的比例均为90:10,分别达到20.0%和15.8%。采用气相色谱-质谱联用技术,在400 ~ 600℃条件下,以90:10的比例对CNS和CFP的生物油收率进行分析,发现其主要成分为酸类、酯类、酮类、呋喃类、吡喃类、愈创木酚类、丁香酚类和酚类化合物,其中酚类化合物占主导地位。CNS(500℃)和CFP(400℃)生物油中酚类衍生物的含量分别为23.56%和13.23%。用Folin-Ciocalteu试剂对生物油中酚类物质含量进行分析,CNS和CFP的酚类物质含量分别为146.83 ~ 164.83 mg·GAE·g·DW−1和39.34 ~ 45.91 mg·GAE·g DW−1(比例均为90:10)。
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引用次数: 0
Green synthesis of strontium-doped tin dioxide (SrSnO2) nanoparticles using the Mahonia bealei leaf extract and evaluation of their anticancer and antimicrobial activities 利用马洪叶提取物绿色合成锶掺杂二氧化锡(SrSnO2)纳米颗粒及其抗癌和抗菌活性评价
IF 4.3 4区 工程技术 Q1 Engineering Pub Date : 2023-01-01 DOI: 10.1515/gps-2022-8116
A. Aloufi
Abstract In this study, a simple green method was employed to produce strontium (Sr)-doped-tin-dioxide (SnO2) nanoparticles (SrSnO2 NPs) using the Mahonia bealei leaf extract. The synthesized NPs were characterized with XRD, FE-SEM, FTIR, and PL spectroscopy measurements. SrSnO2 NPs were analysed for antimicrobial and anticancer activities. The XRD analysis revealed that the synthesized samples exhibited a tetragonal rutile crystal structure type of tin oxide. The EDX spectrum conforms to the chemical composition and elemental mapping of SrSnO2 NP synthesis. At 632 cm−1, the O–Sn–O band was observed and chemical bonding was confirmed using an FTIR spectrum. The PL spectrum identified surface defects and oxygen vacancies. The SrSnO2 NPs were tested against both Gram-positive and Gram-negative human pathogens. The synthesized nanoparticles exhibited effective antibacterial properties. The anticancer effects of SrSnO2 nanoparticles were also assessed against MCF-7 cells, and growth was decreased with increasing concentrations of the nanoparticles. Dual staining revealed high apoptosis in SrSnO2 NP-treated MCF-7 cells, proving its apoptotic potential. To conclude, we synthesized and characterized potential SrSnO2 nanoparticles using a green approach from the Mahonia bealei leaf extract. Further, green SrSnO2 nanoparticles showed significant antibacterial and anticancer properties against breast cancer cells (MCF-7) through apoptosis, which suggests a healthcare application for these nanoparticles. Graphical abstract An overview of the study presented in a schematic form.
摘要本研究采用一种简单的绿色方法,以马洪叶提取物为原料制备锶掺杂二氧化锡纳米粒子(SrSnO2 NPs)。用XRD、FE-SEM、FTIR和PL光谱对合成的NPs进行了表征。分析SrSnO2 NPs的抗菌和抗癌活性。XRD分析表明,合成的样品呈现出一种四边形金红石型氧化锡晶体结构。EDX光谱符合SrSnO2 NP合成的化学组成和元素映射。在632 cm−1处,观察到O-Sn-O波段,并用FTIR光谱证实了化学键。PL光谱发现了表面缺陷和氧空位。SrSnO2 NPs对革兰氏阳性和革兰氏阴性人致病菌均进行了抑菌试验。合成的纳米颗粒具有有效的抗菌性能。SrSnO2纳米颗粒对MCF-7细胞的抗癌作用也被评估,随着纳米颗粒浓度的增加,MCF-7细胞的生长速度下降。双染色显示SrSnO2 np处理的MCF-7细胞凋亡高,证实了其凋亡潜力。综上所述,我们利用绿色方法从马洪叶提取物中合成并表征了潜在的SrSnO2纳米颗粒。此外,绿色SrSnO2纳米颗粒通过凋亡对乳腺癌细胞(MCF-7)表现出显著的抗菌和抗癌特性,这表明这些纳米颗粒在医疗保健方面具有应用价值。图形摘要以示意图的形式对研究进行概述。
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引用次数: 2
Green-processed nano-biocomposite (ZnO–TiO2): Potential candidates for biomedical applications 绿色加工纳米生物复合材料(ZnO–TiO2):生物医学应用的潜在候选者
IF 4.3 4区 工程技术 Q1 Engineering Pub Date : 2023-01-01 DOI: 10.1515/gps-2023-0076
Naireen Ahmed, Kiran Tanveer, Zohaib Younas, Tayyaba Yousaf, Muhammad Ikram, N. Raja, Z. Mashwani, Saad Alghamdi, Issa Saad Al-Moraya, N. Shesha
Abstract Nanotechnology investigates different promising methodologies in the space of material sciences on a sub-atomic level. Novel methodologies are expected for the accomplishment of protected and successful helpful medicines past the traditional ones, and society needs new prerequisites for innovations, moving towards perfect and green innovation improvement. This review study deals with topics related to green nanotechnology for the investigation of different assays such as anticancer, antidiabetic, anti-larval, and microbial. The confirmation of nanocomposite will be conformed using scanning electron microscopy, energy-dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, and X-ray diffraction to determine the size, shape, and supporting material to stabilize and cap the agent. However, the biomedical application of the ZnO/TiO2 nanocomposite is also discussed. Furthermore, to their remarkable biocompatibility, ZnO/TiO2 has shown significant potential in bio-imaging, tissue engineering, and drug delivery. The biological activities of the green-produced nanoparticles are strong and they are employed in several biological applications across various assays. The current review covers the creation and most recent developments of bio-nanocomposite materials from plant sources (such as leaves, stems, bark, roots, rhizomes, fruits, flowers, and seeds), as well as their anti-cancer, diabetes-related, and anti-larval activities. This is followed by a thorough discussion of their mechanisms of action.
摘要纳米技术在亚原子水平上研究材料科学领域中不同的有前景的方法。新的方法有望超越传统方法,获得受保护和成功的有益药物,社会需要创新的新先决条件,朝着完善和绿色创新的方向发展。这项综述研究涉及与绿色纳米技术相关的主题,用于研究不同的检测方法,如抗癌、抗糖尿病、抗幼虫和微生物。纳米复合材料的确认将使用扫描电子显微镜、能量色散X射线光谱、傅立叶变换红外光谱和X射线衍射来确定尺寸、形状和支撑材料,以稳定和覆盖试剂。然而,还讨论了ZnO/TiO2纳米复合材料的生物医学应用。此外,由于其显著的生物相容性,ZnO/TiO2在生物成像、组织工程和药物递送方面显示出巨大的潜力。绿色生产的纳米颗粒的生物活性很强,它们被用于各种测定中的多种生物应用。目前的综述涵盖了来自植物来源(如叶、茎、树皮、根、根状茎、果实、花和种子)的生物复合材料的产生和最新发展,以及它们的抗癌、糖尿病相关和抗幼虫活性。随后对其行动机制进行了深入讨论。
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引用次数: 0
Recovery of critical metals from carbonatite-type mineral wastes: Geochemical modeling investigation of (bio)hydrometallurgical leaching of REEs 从碳酸盐岩类矿物废料中回收关键金属:稀土元素(生物)湿法浸出的地球化学建模研究
IF 4.3 4区 工程技术 Q1 Engineering Pub Date : 2023-01-01 DOI: 10.1515/gps-2022-8086
Nneka Joyce Odimba, R. Khalidy, Reza Bakhshoodeh, R. Santos
Abstract Rare earth elements (REEs) are typically found in low concentrations within natural rocks that make up mine tailings, such as carbonates in association with silicates within carbonatite igneous rocks, so it is of interest to develop (bio)hydrometallurgical ways to liberate them from the silicate matrix. This work investigated, through geochemical modeling, the extraction of europium and ytterbium carbonates from rocks containing one of four silicates (chrysotile, forsterite, montmorillonite, and phlogopite) via chemical (mineral acid) or biological (organic acid) leaching. The results indicated conditions that led to either congruent or incongruent dissolution of the mineral phases and the formation of transient mineral phases. Chemical leaching models suggest that REE carbonates are recoverable in one-step leaching from forsterite and chrysotile rocks, while they are recoverable in a secondary leaching step from montmorillonite and phlogopite rocks. Gibbsite as a transient phase is shown to complicate REE recovery, potentially requiring reactive extraction. REEs have the potential to be recovered from silicate rocks via chemoorganotrophic bioleaching, but the process configuration would differ depending on the predominant minerals that make up the rock, and the type of REE present in it.
摘要稀土元素(REE)通常在构成尾矿的天然岩石中以低浓度存在,例如碳酸盐岩和碳酸盐岩火成岩中的硅酸盐,因此开发(生物)湿法冶金方法将其从硅酸盐基质中释放出来是很有意义的。这项工作通过地球化学建模,研究了通过化学(矿物酸)或生物(有机酸)浸出从含有四种硅酸盐(温石棉、镁橄榄石、蒙脱石和金云母)之一的岩石中提取碳酸铕和镱的方法。结果表明,这些条件导致矿物相的一致或不一致溶解以及过渡矿物相的形成。化学浸出模型表明,REE碳酸盐可在镁橄榄石和温石棉的一步浸出中回收,而在蒙脱石和金云母的二步浸出中可回收。赤铁矿作为一种过渡相,使稀土元素回收复杂化,可能需要反应萃取。REE有可能通过化学-有机-营养生物浸出从硅酸盐岩石中回收,但过程配置会因构成岩石的主要矿物和其中存在的REE类型而异。
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引用次数: 0
Synthesis and characterization of Pluronic F-127-coated titanium dioxide nanoparticles synthesized from extracts of Atractylodes macrocephala leaf for antioxidant, antimicrobial, and anticancer properties 白术叶提取物制备的Pluronic f -127包被二氧化钛纳米颗粒的合成及抗氧化、抗菌和抗癌性能
4区 工程技术 Q1 Engineering Pub Date : 2023-01-01 DOI: 10.1515/gps-2023-0100
Riyad A. Almaimani
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.
在全球范围内,纳米技术正在产生重大的兴趣,因为它在广泛的工业领域的前景。最常用的纳米粒子是二氧化钛纳米粒子(PF-127包覆二氧化钛纳米粒子),它可以通过物理、化学和环境因素来配制。建立一种既经济又环保的制造方法是由于对人类健康影响的日益关注。本研究采用苍术叶提取物制备绿色Pluronic F-127 (PF-127)包被tio2 NPs,并通过多种方法对其进行了研究。PF-127包覆的tio2 NPs尺寸为60 nm,呈多边形金红石型晶体结构。此外,还研究了NPs对几种病原菌的抑菌能力。采用MTT试验评估NPs对HEp-2、KB和Vero细胞系的细胞毒性。注意到PF-127包被的二氧化钛NPs对几种病原体的抗菌潜力增加。NPs具有显著的抗氧化活性,且随浓度的增加而增强。NPs对HEp-2和KB细胞系表现出明显的细胞毒作用,但对Vero细胞没有毒性。这表明了它们对癌细胞系的细胞毒性和对健康细胞的无毒性。这表明PF-127包被的二氧化钛NPs具有有益的抗菌和抗肿瘤特性。
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引用次数: 0
Microwave-accelerated pretreatment technique in green extraction of oil and bioactive compounds from camelina seeds: Effectiveness and characterization 微波加速预处理技术在绿色提取亚麻荠籽油和生物活性物质中的应用:有效性和表征
4区 工程技术 Q1 Engineering Pub Date : 2023-01-01 DOI: 10.1515/gps-2023-0101
Pardis Mortazavi, Sodeif Azadmard-Damirchi, Zahra Piravi-Vanak, Omid Ahmadi, Navideh Anarjan, Fleming Martinez, Hoda Jafarizadeh-Malmiri
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。
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引用次数: 0
期刊
Green Processing and Synthesis
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