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Development and In vitro Assessment of Topical Microemulsion Based Pluronic-Lecithin Organogel for the Management of Arthritic Pain 用于治疗关节炎疼痛的基于聚uronic-卵磷脂有机凝胶的局部微乳液的开发与体外评估
Q3 Engineering Pub Date : 2024-01-26 DOI: 10.2174/0118764029280588231215044630
Abhishek Yadav, Vikas Jhawat, Rahul Pratap Singh, Sunita Chauhan, Rohit Dutt, Rajesh Goyal, Deependra Singh
Topical delivery of NSAIDs through organogels might transport lornoxicamto the site of action, minimizing gastrointestinal problems and adverse effects.In the current investigation, a lecithin organogel containing lornoxicam was made bymicroemulsion method. For this purpose, a certain amount of pure soya lecithin was dispersed insuitable isopropyl myristate as a dispersant and emulsifier at room temperature to form the oilyphase. The lecithin was completely dissolved in the combination by the next morning. Sorbic acidwas then added to the mixture as a preservative, Pluronic F-127 and potassium sorbate wereweighed out, and then they were mixed with cold water to create an aqueous phase, and mentholwas added. On the next morning, lornoxicam, the active component, became soluble in polyethyleneglycol-400 and combined with the lecithin isopropyl palmitate mixture. The oily portionwas agitated using a mechanical stirrer at 400 rpm while the aqueous phase was introducedgradually.The lornoxicam organogel preparation was it was assessed for its physical appearance,organoleptic characteristics, consistency, gelation temperature, drug content, and in vitro releasestudies. The active ingredient content of formulation F5 was the highest at 93.33. FormulationsF4 and F5 were selected for kinetic studies because they had all physical characteristics underreasonable limits, the active ingredient level was the greatest, and the active ingredient releasewas the fastest in eight hours.The transdermal organogel formulation of lornoxicam was found to be effective fortopical distribution of the drug and when administered topically, it has strong anti-inflammatoryand anti-rheumatic action.
通过有机凝胶局部给药非甾体抗炎药可将洛诺昔康运送到作用部位,最大限度地减少胃肠道问题和不良反应。为此,将一定量的纯大豆卵磷脂作为分散剂和乳化剂,在室温下分散于肉豆蔻酸异丙酯中,形成油相。第二天早上,卵磷脂完全溶解在混合液中。然后在混合物中加入山梨酸作为防腐剂,称出 Pluronic F-127 和山梨酸钾,然后将它们与冷水混合形成水相,并加入薄荷醇。第二天早上,活性成分洛诺昔康溶于聚乙二醇-400,并与卵磷脂棕榈酸异丙酯混合物混合。用机械搅拌器以每分钟 400 转的速度搅拌油性部分,同时逐渐加入水相。对洛诺昔康有机凝胶制剂的物理外观、感官特性、稠度、凝胶温度、药物含量和体外释放研究进行了评估。配方 F5 的有效成分含量最高,为 93.33。研究发现,洛诺昔康透皮有机凝胶制剂能有效地促进药物的局部分布,并且在局部用药时具有很强的抗炎和抗风湿作用。
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引用次数: 0
Advances in Neutrophil Cell Membrane-coated Nano Drug Delivery Systems: A Comprehensive Review 中性粒细胞膜包被纳米给药系统的研究进展:全面综述
Q3 Engineering Pub Date : 2024-01-25 DOI: 10.2174/0118764029272246231120045443
Neha Bajwa
Cell-mediated drug delivery systems have gained significant attention in medical researchdue to their potential for enhanced therapeutic specificity and efficacy in various diseases. Amongimmune cells, neutrophils (NEs) have emerged as a promising candidate for drug delivery due to theirprevalence and rapid response in inflammatory sites. However, the short lifespan and challenges associatedwith the in vitro cultivation of NEs have hindered their direct use for drug administration. Thisreview aims to highlight the importance of NEs as effective drug-delivery vehicles and elucidate theunderlying mechanisms contributing to their pharmacological efficacy. By analyzing recent studiesand advancements in the field, we will discuss the strategies employed to harness NEs as drug carriers,including coating nanostructures with NE cell membranes.Additionally, we will explore the unique properties of NEs that enable targeted drug delivery, such astheir ability to navigate through complex biological environments and actively migrate toward inflamedtissues. Furthermore, we will delve into the mechanisms of NE-mediated drug release and thepotential applications of NE-based drug delivery systems in various therapeutic areas. Overall, thisreview provides valuable insights into the use of NEs as drug delivery mechanisms and offers perspectiveson the future directions of this exciting field.
细胞介导的给药系统在医学研究中备受关注,因为它们具有提高各种疾病治疗特异性和疗效的潜力。在免疫细胞中,嗜中性粒细胞(NEs)因其在炎症部位的普遍存在和快速反应而成为一种很有前途的给药候选细胞。然而,嗜中性粒细胞的寿命短以及体外培养嗜中性粒细胞所面临的挑战阻碍了它们直接用于给药。本综述旨在强调 NEs 作为有效给药载体的重要性,并阐明其药理作用的基本机制。通过分析该领域的最新研究和进展,我们将讨论利用 NEs 作为药物载体的策略,包括在纳米结构上包覆 NE 细胞膜。此外,我们还将探讨 NEs 实现靶向给药的独特特性,例如 NEs 在复杂生物环境中的导航能力和向炎症组织主动迁移的能力。此外,我们还将深入探讨 NE 介导的药物释放机制以及基于 NE 的给药系统在不同治疗领域的潜在应用。总之,这篇综述为我们提供了有关将 NEs 用作给药机制的宝贵见解,并展望了这一令人兴奋的领域的未来发展方向。
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引用次数: 0
The Prospective Applications of arising Nanostructured DielectricMaterials in Storage of Energy: A Comprehensive Review 纳米结构介电材料在储能领域的应用前景:全面综述
Q3 Engineering Pub Date : 2024-01-25 DOI: 10.2174/0118764029277532231231100117
Suryakanta Swain, H. B. Samal, Santosh Satpathy, B. R. Jena, G. Pattnaik, Sheerin Bashas, Sonu Barad
The manufacture and study of innovative materials that enable the availability of relevant technologies are vital in light of the energy demands of various human activitiesand the need for a substantial shift in the energy matrix.A strategy based on the creation of enhanced applications for batteries has been devisedto reduce the conversion, storage, and feeding of renewable energy like fuel cells and electrochemical capacitors.Conductive polymers (CP) can be utilised instead of traditional inorganic chemicals.Electrochemical energy storage devices with similar capabilities can be built using approachesbased on the production of composite materials and nanostructures.CP's nanostructuring is notable for its concentration on synergistic coupling with other materials, which sets it apart from other nanostructures that have been developed in the preceding twodecades. This is due to the fact that, when paired with other materials, their distinctive morphologyand adaptability significantly enhance performance in areas like the suppression of ionic diffusiontrajectories, electronic transport and the improvement of ion penetrability and intercalation spaces.The present study forecasts the wide-ranging modern applications of diversenanostructured dielectric materials along with its future prospectives. The potential contributions ofnanostructured carbon nanotubes to the development of innovative materials for energy storage devices are also critically discussed in this context, which delivers a summary of the present state ofinformation on this emerging topic.
鉴于人类各种活动对能源的需求,以及能源结构发生重大转变的需要,制造和研究能够提供相关技术的创新材料至关重要。导电聚合物(CP)可被用来替代传统的无机化学品。使用基于生产复合材料和纳米结构的方法,可以制造出具有类似功能的电化学储能装置。CP 的纳米结构因其专注于与其他材料的协同耦合而引人注目,这使其有别于前二十年开发的其他纳米结构。这是因为,当与其他材料配对时,其独特的形态和适应性可显著提高其在抑制离子扩散轨迹、电子传输以及改善离子穿透性和插层空间等方面的性能。本研究预测了多种纳米结构介电材料的广泛现代应用及其未来前景。本研究预测了多种纳米结构电介质材料的广泛现代应用及其未来前景,并对纳米结构碳纳米管在开发用于储能设备的创新材料方面的潜在贡献进行了批判性讨论,对这一新兴课题的信息现状进行了总结。
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引用次数: 0
Energy Optimization for RC and RLC Interconnect Design in Low PowerVLSI 低功率集成电路中 RC 和 RLC 互连设计的能量优化
Q3 Engineering Pub Date : 2023-12-19 DOI: 10.2174/0118764029277963231127105304
Himani Bhardwaj, Shruti Jain, Harsh Sohal
The global RC interconnects have become the controlling parameter for acircuit’s performance. But with the decrease in technology, an increase in resistance has becomeprominent. This increase further directly affects the performance of the system by increasing the performance parameters of the circuit like delay and power consumption. To resolve this issue and to becompatible with Internet of Things (IoT) applications, the interconnect circuits are required to behigh speed with less heat generationIn this paper, a new RC and RLC interconnect circuit design was proposed for 45nm technology to enhance the performance parameters. Furthermore, the RC interconnect design was simulated for lumped and distributed networks. The parasitic component values (resistance, inductance,and capacitance) are evaluated using PTM technology.The proposed interconnect circuit's resistance value decreased by a factor of 4, but the capacitance remains the same. Furthermore, power consumption and delay values were attained. Anoverall comparison was done between RC and RLC networks.63.3% power improvement and 24.87% delay improvement were observed in the RLCnetwork over RC distributed network.
全球 RC 互连已成为电路性能的控制参数。但是,随着技术的进步,电阻的增加变得十分突出。电阻的增加会增加电路的性能参数,如延迟和功耗,从而进一步直接影响系统的性能。为解决这一问题并与物联网(IoT)应用兼容,要求互连电路在高速运行的同时发热量更少。本文针对 45 纳米技术提出了一种新的 RC 和 RLC 互连电路设计,以提高性能参数。此外,还模拟了块状和分布式网络的 RC 互连设计。利用 PTM 技术对寄生元件值(电阻、电感和电容)进行了评估。拟议互连电路的电阻值降低了 4 倍,但电容保持不变。此外,还获得了功耗和延迟值。与 RC 分布式网络相比,RLC 网络的功耗降低了 63.3%,延迟降低了 24.87%。
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引用次数: 0
Amoxicillin-loaded Nanotechnological Carriers for the Effective Treatment of Helicobacter pylori Infection 有效治疗幽门螺旋杆菌感染的阿莫西林纳米载体
Q3 Engineering Pub Date : 2023-12-07 DOI: 10.2174/0118764029259927231127094657
Darsh Gautam, Poonam Talwan, Sahil Dhiman, Rahul Gill, Aparna Thakur, Simran Dhiman, Deexa Sharma, Akhil Kumar, Saksham Sharma
The bacterium Helicobacter pylori (H. pylori) is known to cause gastroduodenal disorders associated with the stomach lining that grows in the gastrointestinal tract, and cancause gastritis, peptic ulcer, gastric lymphoma, and stomach cancer. Nearly 50% of people worldwidesuffer from H. pylori infection. This infection is more prominent in poor nations and undevelopedcountries, and is caused by multiple factors, such as consumption of unhygienic food, crowded livingstyle, etc. In the eradication treatment of gastric H. pylori infection, conventional dosage forms havevarious adverse effects on patients.In this study, we have explored current developments in the utilization of nanotechnologicalcarriers for the successful management of H. pylori infection. In order to combat rising amoxicillin resistance, this review has focused on therapeutic strategies that use cyclodextrins, niosomes, liposomes,microspheres, nanoparticles, solid lipid nanoparticles, and nanostructure nanoparticles to improvetherapy against H. pylori.The entrapment of amoxicillin in various nanotechnological carriers enhances its effectiveness and reduces adverse effects. These carriers lead to targeted drug release and improve drug penetration to the gastroduodenal disease site that locally controls and adjusts the drug release.For the effective treatment of H. pylori infection, nanotechnological carriers have provided a new avenue for the development of innovative, high-impact, and low-dose systems. The main objective of this review was to outline the present limitations of H. pylori therapy and new potential alternatives, as well as to report how nanotechnological carriers may be used to overcome treatmentshortcomings.
众所周知,幽门螺杆菌(h.p ylori)会引起与胃肠道内生长的胃内膜相关的胃十二指肠疾病,并引起胃炎、消化性溃疡、胃淋巴瘤和胃癌。全世界近50%的人患有幽门螺旋杆菌感染。这种感染在贫穷国家和不发达国家更为突出,是由多种因素引起的,如食用不卫生的食品、拥挤的生活方式等。在胃幽门螺杆菌感染的根除治疗中,常规剂型对患者有各种不良反应。在这项研究中,我们探讨了利用纳米技术载体成功治疗幽门螺杆菌感染的最新进展。为了对抗不断上升的阿莫西林耐药性,本文综述了使用环糊精、乳质体、脂质体、微球、纳米颗粒、固体脂质纳米颗粒和纳米结构纳米颗粒的治疗策略,以改善对幽门螺杆菌的治疗。阿莫西林包埋在各种纳米技术载体中,提高了其有效性,减少了不良反应。这些载体导致药物靶向释放,改善药物对胃十二指肠疾病部位的渗透,局部控制和调节药物释放。为了有效治疗幽门螺杆菌感染,纳米技术载体为开发创新的、高影响的、低剂量的系统提供了新的途径。本综述的主要目的是概述目前幽门螺杆菌治疗的局限性和新的潜在替代方案,并报告如何使用纳米技术载体来克服治疗缺点。
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引用次数: 0
Activation Energy Rechargeable Prussian Yellow Nano Film Electrode using Hydrated Ions 使用水合离子的活化能可充电普鲁士黄纳米薄膜电极
Q3 Engineering Pub Date : 2023-12-06 DOI: 10.2174/0118764029204082231120144906
Abeer Baioun, H. Kellawi
Interfacial charge transfer is a fundamental issue in both the science and technologyof the batteries. In this work, the activation energy for the interfacial charge transfer, Ea, though PYthin film was estimated by measurement measurements of electrochemical impedance spectroscopy(EIS) for both monovalent and multivalent hydration cations: Li+, Na+, K+, Ca+2 and Mg+2 in aqueouselectrolytes.Rechargeable batteries have become quintessential energy conversion devices that arewidely used in portable electronic devices and hybrid electric vehicles. PB and its analogues haveopen channels that allow rapid insertion/extraction of different cations ,and that lead to a long cycleof its in such as batteries (Na+, Li+ and K+)preparation of Prussian yellow Nanofilm on ITO glass by a simple chemical facial methodand study of its charge/discharge processes of intercalation compounds in rechargeable featuresThe electrochemical measurements of potentiostat/galvanostat cyclic voltammograms andEIS were carried out in three-electrode cells, with Ag/AgCl as a reference electrode. Pt. and ITO|PYas working and counter electrodes respectively. The electrolytes were solutions of 0.1M+z cation inwater where M+z was one of the following cations: Li+, Na+, K+, Ca+2 or Mg+2.The effect of hydration on the activation energy for the PY thin film was studied by the EISat different temperatures. The ions K+ have an activation energy interfacial, which is lower than thatof Na+ and Li+. So the coulombic repulsion at the interface is largely suppressed by the screening effectof ions hydration, explaining the small values of Ea with aqueous electrolyte. Furthermore, thehydration helped the Ca+2 and Mg+2 intercalation in PBA but with large values of Ea that were due tocoulombic repulsion at the interface.Prussian blue can be considered among the most promising cathode materials for energystorage batteries because of their rigid open framework with large interstitial sites that can pertainto mono and bivalent cation mobility and accommodate volume variation during ions insertion/extraction
界面电荷转移是电池科学和技术中的一个基本问题。在这项工作中,通过电化学阻抗谱(EIS)测量水电解质中一价和多价水合阳离子:Li+, Na+, K+, Ca+2和Mg+2的测量,估计了PYthin薄膜界面电荷转移的活化能Ea。可充电电池已成为典型的能量转换设备,广泛应用于便携式电子设备和混合动力汽车中。PB及其类似物具有开放的通道,允许不同阳离子的快速插入/提取,并导致其在诸如电池(Na+, Li+和K+)中的长循环。用简单的化学表面方法在ITO玻璃上制备普鲁士黄纳米膜,并研究其插入化合物在可充电特性中的充放电过程。以Ag/AgCl作为参比电极。pt和ITO分别作为工作电极和对电极。电解质为0.1M+z阳离子水溶液,其中M+z为Li+、Na+、K+、Ca+2或Mg+2中的一种。在不同温度下研究了水化反应对PY薄膜活化能的影响。K+离子具有比Na+和Li+离子低的活化能界面。因此,界面处的库仑斥力在很大程度上被离子水合作用的屏蔽效应所抑制,这解释了水溶液中Ea值小的原因。此外,水化作用有助于Ca+2和Mg+2在PBA中的嵌入,但由于界面处的库仑排斥作用,Ea值较大。普鲁士蓝可以被认为是最有前途的储能电池正极材料之一,因为它们具有刚性的开放式框架,具有大的间隙位点,可以适用于单价和二价阳离子的迁移,并在离子插入/提取过程中适应体积变化
{"title":"Activation Energy Rechargeable Prussian Yellow Nano Film Electrode using Hydrated Ions","authors":"Abeer Baioun, H. Kellawi","doi":"10.2174/0118764029204082231120144906","DOIUrl":"https://doi.org/10.2174/0118764029204082231120144906","url":null,"abstract":"\u0000\u0000Interfacial charge transfer is a fundamental issue in both the science and technology\u0000of the batteries. In this work, the activation energy for the interfacial charge transfer, Ea, though PY\u0000thin film was estimated by measurement measurements of electrochemical impedance spectroscopy\u0000(EIS) for both monovalent and multivalent hydration cations: Li+, Na+, K+, Ca+2 and Mg+2 in aqueous\u0000electrolytes.\u0000\u0000\u0000\u0000Rechargeable batteries have become quintessential energy conversion devices that are\u0000widely used in portable electronic devices and hybrid electric vehicles. PB and its analogues have\u0000open channels that allow rapid insertion/extraction of different cations ,and that lead to a long cycle\u0000of its in such as batteries (Na+, Li+ and K+)\u0000\u0000\u0000\u0000preparation of Prussian yellow Nanofilm on ITO glass by a simple chemical facial method\u0000and study of its charge/discharge processes of intercalation compounds in rechargeable features\u0000\u0000\u0000\u0000The electrochemical measurements of potentiostat/galvanostat cyclic voltammograms and\u0000EIS were carried out in three-electrode cells, with Ag/AgCl as a reference electrode. Pt. and ITO|PY\u0000as working and counter electrodes respectively. The electrolytes were solutions of 0.1M+z cation in\u0000water where M+z was one of the following cations: Li+, Na+, K+, Ca+2 or Mg+2.\u0000\u0000\u0000\u0000The effect of hydration on the activation energy for the PY thin film was studied by the EIS\u0000at different temperatures. The ions K+ have an activation energy interfacial, which is lower than that\u0000of Na+ and Li+. So the coulombic repulsion at the interface is largely suppressed by the screening effect\u0000of ions hydration, explaining the small values of Ea with aqueous electrolyte. Furthermore, the\u0000hydration helped the Ca+2 and Mg+2 intercalation in PBA but with large values of Ea that were due to\u0000coulombic repulsion at the interface.\u0000\u0000\u0000\u0000Prussian blue can be considered among the most promising cathode materials for energy\u0000storage batteries because of their rigid open framework with large interstitial sites that can pertain\u0000to mono and bivalent cation mobility and accommodate volume variation during ions insertion/\u0000extraction\u0000","PeriodicalId":18543,"journal":{"name":"Micro and Nanosystems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138595738","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}
引用次数: 0
Universal and Reversible Gate Design in Quantum-dot Cellular Automata Nanotechnology 量子点蜂窝自动机纳米技术中的通用和可逆栅极设计
Q3 Engineering Pub Date : 2023-12-06 DOI: 10.2174/0118764029270222231123071138
V.K. Sharma, Sadat Riyaz
Growing progress in the field of nanoelectronics necessitates ever more advancednanotechnology due to the continued scaling of conventional devices. For the purpose of fabricatingcurrent integrated circuits (ICs), QCA nanotechnology is the most suitable substitute forcomplementary metal oxide semiconductor (CMOS) technology. The problem of short-channel secondaryeffects at the ultra-nanoscale level confronts CMOS technology.Quantum-dot cellular automata (QCA) nanotechnology overcomes the issues of conventionallogic circuit design methods due to its numerous advantages. This research work aims to design anenergy-efficient, reliable, universal, 3×3, and reversible logic gate for the implementation of variouslogical and Boolean functions in quantum-dot cellular automata (QCA) nanotechnology.It is desirable for portable systems to have a small size, extremely low power consumption,and a clock rate in the terahertz. As a result, QCA nanotechnology is an incredible advancement fordigital system applications and the design of future systems.This research article proposes a novel, ultra-efficient, multi-operative, 3×3 universal reversible gate and implemented in QCA nanotechnology using precise QCA cell interaction. The proposed gate is used for the implementation of all the basic logic gates to validate its universality. The multi-operation nature of the proposed gate is established by the implementation of all the 13 standard Boolean functions. The energy dissipation analysis of the design has been presented for the varying setup.This research article proposes a novel, ultra-efficient, multi-operative, 3×3 universal reversiblegate implemented in QCA nanotechnology using precise QCA cell interaction. The proposedgate is used for the implementation of all the basic logic gates to validate its universality. The implementationof all thirteen standard Boolean functions establishes the proposed gate's multi-operationalnature. The energy dissipation analysis of the design has been presented for the varying setups.The proposed gate is area-efficient because it uses minimum QCA cells. The analysis establishes minimum energy dissipation by the proposed design and endorsing as the ultra-high efficient designs.The proposed gate is area-efficient because it uses minimum QCA cells. Various logical andBoolean functions are effectively implemented using the proposed gate. The result analysis establishesthe minimum energy dissipation of the proposed design and endorses it as an ultra-efficient design.The QCA cell interaction method demonstrates the best way to design a universal,reversible, and multi-operative gate.NA
由于传统器件的不断缩小,纳米电子学领域的不断发展需要更先进的纳米技术。为了制造电流集成电路(ic), QCA纳米技术是互补金属氧化物半导体(CMOS)技术最合适的替代品。超纳米级的短通道二次效应问题是CMOS技术面临的难题。量子点元胞自动机(QCA)纳米技术克服了传统电路设计方法的诸多优点。本研究工作旨在设计一种节能、可靠、通用、3×3和可逆的逻辑门,用于实现量子点元胞自动机(QCA)纳米技术中的各种逻辑和布尔函数。对于便携式系统来说,理想的是体积小,功耗极低,时钟频率在太赫兹。因此,QCA纳米技术是数字系统应用和未来系统设计的一个令人难以置信的进步。本文提出了一种新颖、超高效、多操作、3×3通用可逆门,并利用精确的QCA细胞相互作用在QCA纳米技术中实现。将所提出的门用于实现所有基本逻辑门,以验证其通用性。该门的多操作特性是通过实现所有13个标准布尔函数来建立的。对不同设置下的设计进行了耗能分析。本文提出了一种新颖、超高效、多操作、3×3通用可逆的QCA纳米技术,利用精确的QCA细胞相互作用。将所提出的门用于所有基本逻辑门的实现,以验证其通用性。所有13个标准布尔函数的实现建立了所提议的门的多操作性质。对不同设置下的设计进行了耗能分析。所提出的门是面积有效的,因为它使用最小的QCA单元。分析表明,所提出的设计方案具有最小的能耗,是一种超高效率的设计方案。所提出的门是面积有效的,因为它使用最小的QCA单元。各种逻辑和布尔函数有效地实现使用所提出的门。结果分析确定了所提出的设计的最小能耗,并认可它是一种超高效的设计。QCA细胞相互作用方法展示了设计通用、可逆和多操作门的最佳方法。NA
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引用次数: 0
Synthesis and Characterization of V2O5 Nanorods Using HydrothermalMethod for Energy Application 利用水热法合成和表征用于能源应用的 V2O5 纳米棒
Q3 Engineering Pub Date : 2023-12-05 DOI: 10.2174/0118764029265057231121094206
Rupin Ranu, K. Chavan, S. Desarada, V.K. Gade, S.L. Kadam
Nanomaterials are very useful in energy harvesting and energy storage devices.Morphological features play a vital role in energy storage devices. Supercapacitors and batteriesare examples of energy storage devices. The working of a supercapacitor is decided by the natureof the microstructure and other features of the electrode material. Vanadium Pentaoxide (V25) isone of the promising materials due to its attractive features, such as band gap, multiple oxidationstate, and large conductivity transition from semiconducting to conducting domain.This study aimed to perform the tuning of structural, optical and morphological propertiesof V2O5 nanomaterials using the hydrothermal method.A low-cost hydrothermal method was used in this work. Hydrothermal synthesis was carriedout at different concentrations of Ammonium Metavanadate (NH4VO3), varying from 0.06 M,0.08 M, and 0.1 M in the aqueous medium. Moreover, the pH of the solution was maintained at 4 usingdrop-wise addition of H2SO4. Hydrothermal synthesis was carried out at 160° for 24 hours. Thesynthesized precipitate was annealed at 700° for 7 hours in ambient air. Structural, optical, morphological,and elemental probing was carried out.XRD revealed the formation of monoclinic crystalline phase formation of V2O5. Crystallitesize increased with an increase in the concentration of vanadium precursor. The band gap obtainedusing UV-Vis spectroscopy decreased upon an increase in concentration. SEM micrographs displayednanosheet and nanorod-like distorted morphology. The presence of vanadium and oxygenwas noticed in the EDS study.Nanoparticles with attractive features are very useful as an electrode material for supercapacitors.Upon changing concentration, we can change the band gap of the material, adding an extraedge in the use of these materials.
纳米材料在能量收集和能量储存装置中非常有用。形态特征在储能装置中起着至关重要的作用。超级电容器和电池是能量存储设备的例子。超级电容器的工作是由电极材料的微观结构和其他特性决定的。五氧化钒(V25)具有带隙、多氧化态、从半导体到导电的大电导率转变等特点,是一种很有前途的材料。本研究旨在利用水热法对V2O5纳米材料的结构、光学和形态特性进行调谐。本研究采用了低成本的水热法。在不同浓度的偏氰酸铵(NH4VO3)水溶液中,分别为0.06 M、0.08 M和0.1 M,进行水热合成。此外,通过滴加H2SO4将溶液的pH维持在4。160°水热合成24小时。将合成的析出物在室温700℃下退火7小时。进行了结构、光学、形态和元素探测。XRD显示V2O5形成单斜晶相。随着钒前驱体浓度的增加,晶粒尺寸增大。紫外可见光谱法得到的带隙随着浓度的增加而减小。扫描电镜显微照片显示纳米片和纳米棒状扭曲形貌。在EDS研究中发现了钒和氧的存在。纳米粒子具有吸引人的特性,是非常有用的超级电容器电极材料。当浓度改变时,我们可以改变材料的带隙,在这些材料的使用中增加一个额外的边缘。
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引用次数: 0
Preparation, Characterization, and Release Profile Study of Vincristine Sulfate-loaded Polycaprolactone Nanoparticles 硫酸长春新碱负载聚己内酯纳米颗粒的制备、表征和释放谱研究
Q3 Engineering Pub Date : 2023-12-05 DOI: 10.2174/0118764029271070231117041624
Walaa Fawaz, Jameela Hasian, I. Alghoraibi
Vincristine sulfate is commonly used to treat different types of cancers. However,its effectiveness is hindered by undesirable side effects, which significantly limit its applicationsin medicine.This study aims to prepare vincristine nanoparticles, in order to develop a promising approachfor cancer therapy.Vincristine nanoparticles were prepared by utilizing polycaprolactone as a carrier throughthe double emulsion method. The morphological characteristics and particle size of the vincristine nanoparticleswere examined. The surface charge and average dynamic size, encapsulation efficiency inaddition to release profile study were also evaluated.Dynamic Light Scattering confirmed the small size of nanoparticles (~200 nm). SEM showedspherical-shaped nanoparticles with smooth surfaces, and the polydispersity index values of the preparednanoparticles were below 0.5 in all preparations. The zeta potential of the nanoparticles wasfound to be negative, which can be attributed to the presence of carboxylic groups in the PCL polymer,The encapsulation efficiency of Vincristine-loaded nanoparticles (NPs) varied from 36% to 57% for allthe prepared NPs with varying amounts of PCL. The release profile demonstrated a prolonged releaseof Vincristine from the nanoparticles compared to the Vincristine solution.The double emulsion solvent evaporation method was used successfully to prepare vincristine-loaded PCL nanoparticles, which suggests that nanoscale carriers hold promise as effectivevehicles for delivering chemotherapeutic agents in the treatment of cancer.
硫酸长春新碱通常用于治疗不同类型的癌症。然而,它的有效性受到不良副作用的阻碍,这极大地限制了它在医学上的应用。本研究旨在制备长春新碱纳米颗粒,以开发一种有前景的癌症治疗方法。以聚己内酯为载体,采用双乳液法制备了长春新碱纳米颗粒。研究了长春新碱纳米颗粒的形态特征和粒径。并对其表面电荷、平均动态粒径、包封效率和释放曲线进行了评价。动态光散射证实了纳米颗粒的小尺寸(~200 nm)。SEM显示纳米颗粒呈球形,表面光滑,制备的纳米颗粒的多分散性指数均在0.5以下。结果表明,纳米粒子的zeta电位为负,这可归因于PCL聚合物中羧基的存在。在不同PCL含量的纳米粒子中,长春新碱负载纳米粒子(NPs)的包封效率从36%到57%不等。释放谱显示,与长春新碱溶液相比,纳米颗粒释放长春新碱的时间更长。双乳液溶剂蒸发法成功制备了长春新碱负载的PCL纳米颗粒,这表明纳米级载体在癌症治疗中有望成为递送化疗药物的有效载体。
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引用次数: 0
Dissolvable Microneedles for the Treatment of Rheumatoid Arthritis 用于治疗类风湿性关节炎的可溶解性微针
Q3 Engineering Pub Date : 2023-11-29 DOI: 10.2174/0118764029273245231117112521
Sanshita, Inderbir Singh
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Micro and Nanosystems
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