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International Journal of Green Nanotechnology最新文献

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Ginkgo as a Green Reducing Agent for Gold Nanoparticles and Nanoplatelets 银杏作为金纳米颗粒和纳米血小板的绿色还原剂
International Journal of Green Nanotechnology Pub Date : 2012-06-15 DOI: 10.1080/19430892.2012.678706
S. Angelo, Erica L. Hartz
{"title":"Ginkgo as a Green Reducing Agent for Gold Nanoparticles and Nanoplatelets","authors":"S. Angelo, Erica L. Hartz","doi":"10.1080/19430892.2012.678706","DOIUrl":"https://doi.org/10.1080/19430892.2012.678706","url":null,"abstract":"ABSTRACT Ginkgo leaf tea has been used as a reducing agent for gold nanoparticles and nanoplatelets. Synthesis is performed via direct heating and microwave heating. Anisotropic nanoplatelet formation is diminished in favor of isotropic nanoparticle formation as the reaction temperature is increased via direct heating. When microwave mediation is used, the extinction spectra indicate less difference among the sols, suggesting athermal effects. Molecular weight filtration studies of the ginkgo tea and the microwave-mediated heating results indicate that the reducing agent in the ginkgo leaf tea is a large molecule, like a protein, rather than a small molecule, like a simple sugar.","PeriodicalId":13985,"journal":{"name":"International Journal of Green Nanotechnology","volume":"55 1","pages":"111-116"},"PeriodicalIF":0.0,"publicationDate":"2012-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84567278","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: 6
Microwave-Assisted Green Synthesis of Small Gold Nanoparticles Using Aqueous Garlic (Allium sativum) Extract: Their Application as Antibiotic Carriers 大蒜(Allium satium)萃取物微波辅助绿色合成金纳米颗粒及其作为抗生素载体的应用
International Journal of Green Nanotechnology Pub Date : 2012-06-15 DOI: 10.1080/19430892.2012.676926
L. Rastogi, J. Arunachalam
{"title":"Microwave-Assisted Green Synthesis of Small Gold Nanoparticles Using Aqueous Garlic (Allium sativum) Extract: Their Application as Antibiotic Carriers","authors":"L. Rastogi, J. Arunachalam","doi":"10.1080/19430892.2012.676926","DOIUrl":"https://doi.org/10.1080/19430892.2012.676926","url":null,"abstract":"ABSTRACT This article establishes a rapid, microwave-assisted green synthetic method for the production of gold nanoparticles (AuNPs) using garlic extract as a reducing and stabilizing agent and seeks their application as antibiotic carriers. The appearance, crystalline nature, size, and shape of nanoparticles are understood by different physical techniques like UV-vis spectroscopy, transmission electron microscopy, and X-ray diffraction. The AuNPs of size varying from 1.8 ± 0.85 nm to 23.2 ± 4.1 nm were synthesized successfully by varying the power of microwave irradiation. Further, AuNPs (of size 23.2 ± 4.1 nm) were functionalized with ciprofloxacin (cfH), a broad-spectrum antibiotic. A red shift in absorption and emission maxima with decreased intensity suggested successful binding of cfH to AuNPs. AuNPs-conjugated cfH (cfH@AuNPs) were found to have better antibacterial activities in terms of zone of inhibition compared to free cfH against the tested bacterial strains.","PeriodicalId":13985,"journal":{"name":"International Journal of Green Nanotechnology","volume":"1 1","pages":"163-173"},"PeriodicalIF":0.0,"publicationDate":"2012-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76398655","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: 17
Ferrite Materials: Introduction, Synthesis Techniques, and Applications as Sensors 铁氧体材料:介绍、合成技术及传感器应用
International Journal of Green Nanotechnology Pub Date : 2012-06-15 DOI: 10.1080/19430892.2012.676918
R. Srivastava, B. Yadav
{"title":"Ferrite Materials: Introduction, Synthesis Techniques, and Applications as Sensors","authors":"R. Srivastava, B. Yadav","doi":"10.1080/19430892.2012.676918","DOIUrl":"https://doi.org/10.1080/19430892.2012.676918","url":null,"abstract":"ABSTRACT The present review summarizes, in a detailed introduction, the synthesis techniques, structures, classifications, uses, properties, and applications of ferrite materials in the fields of sensors. Morphological and structural studies of ferrite materials were performed. A great advantage of ferrites is their porosity, which is necessary for a sensor. These pores serve as humidity or gas adsorption sites and the sensitivity of sensor depends on the size of these pores. The variation in sensitivity with operating temperature at different concentrations of gas for sensing elements CuFe2O4, CdFe2O4, and ZnFe2O4 is discussed. In addition, resistivity–humidity a characteristic and sensitivity for the MgFe2O4 and Mg0.9Sn0.1Fe2O4 corresponding to different values of percentage of relative humidity is discussed.","PeriodicalId":13985,"journal":{"name":"International Journal of Green Nanotechnology","volume":"474 1","pages":"141-154"},"PeriodicalIF":0.0,"publicationDate":"2012-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77043183","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: 78
Studies of Particle Dispersion in Poly(methyl methacrylate)/Organically Modified Montmorillonite Nanocomposites 聚甲基丙烯酸甲酯/有机改性蒙脱土纳米复合材料中的颗粒分散研究
International Journal of Green Nanotechnology Pub Date : 2012-06-15 DOI: 10.1080/19430892.2012.676909
O. Dimitry, W. M. Sayed, A. Saad
{"title":"Studies of Particle Dispersion in Poly(methyl methacrylate)/Organically Modified Montmorillonite Nanocomposites","authors":"O. Dimitry, W. M. Sayed, A. Saad","doi":"10.1080/19430892.2012.676909","DOIUrl":"https://doi.org/10.1080/19430892.2012.676909","url":null,"abstract":"ABSTRACT Poly(methyl methacrylate) (PMMA) was mixed with 1, 3, 5, 7, and 10 wt% of Cloisite 15A to obtain PMMA-based nanocomposites. The thermal stabilities of the obtained nanocomposites were characterized by thermal analysis using a thermogravimetric analyzer (TGA), which showed that addition of organoclay to PMMA up to 5 wt% increased its thermal stability, whereas thermal stabilization was less efficient at 10 wt%. The interaction between PMMA and silicate layers was studied by Fourier transform infrared (FTIR) spectroscopy, which confirmed strong interactions between the nanometric silicate layers and PMMA segments. The electrical properties were studied through the permittivity, dielectric loss, and conductivity measurements. The electrical conductivity, which describes the ionic mobility of the systems, was studied as a function of temperature and showed that the conductivity of PMMA was enhanced upon increasing the organoclay content up to 5 wt% and was then decreased to some extent with a further...","PeriodicalId":13985,"journal":{"name":"International Journal of Green Nanotechnology","volume":"1 4 1","pages":"117-134"},"PeriodicalIF":0.0,"publicationDate":"2012-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83591960","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
Noscapine-Encapsulated Nanopolymers: A Novel Drug-Carrier System to Target the Tumor Cells 诺斯卡平包封的纳米聚合物:一种靶向肿瘤细胞的新型药物载体系统
International Journal of Green Nanotechnology Pub Date : 2012-06-15 DOI: 10.1080/19430892.2012.676904
P. Singh, R. Chandra
{"title":"Noscapine-Encapsulated Nanopolymers: A Novel Drug-Carrier System to Target the Tumor Cells","authors":"P. Singh, R. Chandra","doi":"10.1080/19430892.2012.676904","DOIUrl":"https://doi.org/10.1080/19430892.2012.676904","url":null,"abstract":"ABSTRACT Nanotechnology involves manipulating the physical and chemical properties as well structures at the nanoscale, often involving dimensions that are just tiny fractions of the width of a human hair. Nanotechnology is being used as the basis for new and more effective drug delivery systems and is in early stage development as scaffolding in nerve regeneration research. Predictions for the future have great significance not only in encouraging nanotechnology research and development but also in determining a means of oversight. Noscapine binds to tubulin and alters its conformation and assembly properties; interferes with microtubule dynamics; does not significantly change the microtubule polymer mass even at higher concentrations; arrests a variety of mammalian cells, including drug-resistant variants in mitosis, and targets them for apoptosis; and inhibits progression of tumors. These properties of noscapine encourage further in-depth research and development of its use in treating and reversing a ...","PeriodicalId":13985,"journal":{"name":"International Journal of Green Nanotechnology","volume":"396 1","pages":"80-92"},"PeriodicalIF":0.0,"publicationDate":"2012-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76457441","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: 4
Behavior of 1-Pyrene-Carboxaldehyde Mixed with a Polymer Matrix within the Nano-Dimensional Langmuir-Blodgett Films 1-芘-甲醛与聚合物基体在纳米Langmuir-Blodgett薄膜中的混合行为
International Journal of Green Nanotechnology Pub Date : 2012-06-15 DOI: 10.1080/19430892.2012.676923
Ajitesh Pal, B. K. Mishra, S. Panigrahi, R. K. Nath
{"title":"Behavior of 1-Pyrene-Carboxaldehyde Mixed with a Polymer Matrix within the Nano-Dimensional Langmuir-Blodgett Films","authors":"Ajitesh Pal, B. K. Mishra, S. Panigrahi, R. K. Nath","doi":"10.1080/19430892.2012.676923","DOIUrl":"https://doi.org/10.1080/19430892.2012.676923","url":null,"abstract":"ABSTRACT Mixed films of a polycylic aromatic hydrocarbon 1-pyrene-carboxaldehyde (PyCHO) and a polymer matrix, viz. isotactic poly(methyl methacrylate) (PMMA) were studied at the air–water interface by surface pressure versus area per molecule (π-A) isotherms. The diagrams obtained by plotting the mean area per molecule as a function of the molar fraction of PyCHO showed positive deviations from ideal conditions with a small exception indicating a repulsive type of interaction between PyCHO and PMMA molecules, resulting in the formation of aggregates. Spectroscopic as well as scanning electron microscopy (SEM) studies revealed that aggregates were present when the mixed film was transferred onto quartz substrates at different mole ratios of PyCHO.","PeriodicalId":13985,"journal":{"name":"International Journal of Green Nanotechnology","volume":"21 1","pages":"155-162"},"PeriodicalIF":0.0,"publicationDate":"2012-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87108299","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: 3
Antibacterial Activity of Biologically Synthesized Nanosilver against Drug-Resistant Bacterial Pathogens 生物合成纳米银对耐药病原菌的抑菌活性研究
International Journal of Green Nanotechnology Pub Date : 2012-06-15 DOI: 10.1080/19430892.2012.676931
M. Dubey, S. Bhadauria, V. Sharma, V. Katoch
{"title":"Antibacterial Activity of Biologically Synthesized Nanosilver against Drug-Resistant Bacterial Pathogens","authors":"M. Dubey, S. Bhadauria, V. Sharma, V. Katoch","doi":"10.1080/19430892.2012.676931","DOIUrl":"https://doi.org/10.1080/19430892.2012.676931","url":null,"abstract":"ABSTRACT Biosynthesis of nanoparticles by plant extracts is currently under exploration. Biological methods are a good competent to chemical procedures, which are environmentally friendly and convenient. We report the use of new plant extract of Cuscuta reflexa in the extracellular biosynthesis of silver nanoparticles. Bioactive silver nanoparticle synthesis was achieved by reacting the biomass of C. reflexa with aqueous solutions of silver nitrate (AgNO3) at ambient temperature. The formation of silver nanoparticles was confirmed by ultraviolet-visible (UV-Vis) spectroscopy, X-ray diffraction patterns, and transmission electron microscopy (TEM). In the present study we report the excellent antibacterial activity of silver nanoparticle (with C. reflexa extract) against gram-positive and gram-negative multi-drug-resistant (MDR) bacterial strains using a zone of inhibition method. Scanning electron microscopy (SEM) imaging studies revealed that silver nanoparticles physically damaged the bacterial cell and ...","PeriodicalId":13985,"journal":{"name":"International Journal of Green Nanotechnology","volume":"2 1","pages":"174-182"},"PeriodicalIF":0.0,"publicationDate":"2012-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79182984","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: 1
Synthesis and Evaluation of Cadmium Sulfide/Polymethylmethacrylate Nanocomposite and Their Effect on Physical and Mechanical Properties of Asphalt Pinder 硫化镉/聚甲基丙烯酸甲酯纳米复合材料的合成与评价及其对沥青粉料物理力学性能的影响
International Journal of Green Nanotechnology Pub Date : 2012-06-15 DOI: 10.1080/19430892.2012.676913
I. Nassar
{"title":"Synthesis and Evaluation of Cadmium Sulfide/Polymethylmethacrylate Nanocomposite and Their Effect on Physical and Mechanical Properties of Asphalt Pinder","authors":"I. Nassar","doi":"10.1080/19430892.2012.676913","DOIUrl":"https://doi.org/10.1080/19430892.2012.676913","url":null,"abstract":"ABSTRACT In this work, comparative rheological tests on binders and mechanical tests for unmodified and modified asphalt with a nanocomposite (CdS–polymethylmethyacrylate [PMMA]) were carried out, and the physical and mechanical properties of asphalt were studied. Asphalt (60/70) and binders were modified with a CdS–PMMA nanocomposite to improve its performance in various percentages, 0.2, 0.4, 0.6, 0.8, and 1%. An increase in the softening point, decrease in binder penetration as the additive hardened the binder, increase in kinematic viscosity, increase in absolute viscosity, increase in the percentage stress value, as well as decrease in the percentage strain value were found, which appears that the 0.8% has the better character from the nanocomposite.","PeriodicalId":13985,"journal":{"name":"International Journal of Green Nanotechnology","volume":"49 1","pages":"135-140"},"PeriodicalIF":0.0,"publicationDate":"2012-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75096204","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: 1
Curcumin Inhibits Histone Deacetylase Leading to Cell Cycle Arrest and Apoptosis via Upregulation of p21 in Breast Cancer Cell Lines 姜黄素通过上调p21抑制组蛋白去乙酰化酶导致乳腺癌细胞周期阻滞和凋亡
International Journal of Green Nanotechnology Pub Date : 2012-06-15 DOI: 10.1080/19430892.2012.691799
S. Mukherjee, Ruma Sarkar, J. Biswas, M. Roy
{"title":"Curcumin Inhibits Histone Deacetylase Leading to Cell Cycle Arrest and Apoptosis via Upregulation of p21 in Breast Cancer Cell Lines","authors":"S. Mukherjee, Ruma Sarkar, J. Biswas, M. Roy","doi":"10.1080/19430892.2012.691799","DOIUrl":"https://doi.org/10.1080/19430892.2012.691799","url":null,"abstract":"ABSTRACT Curcumin was reported to modulate the expression of HDACs 1 and 2. The effect of curcumin on the expression levels of acetylated histones (H3 and H4), acetylated p53, p21, cyclinB1, and Cdk-1 were investigated in breast cancer cell lines MCF-7 and MDA-MB-231, expressing wild-type and mutated p53, respectively. Curcumin increased histone acetylation in both cell lines. Increased p53 acetylation was observed in MCF-7 but not in MDA-MB-231. Upregulation of p21 by curcumin was observed in both cell lines, leading to cell cycle arrest and apoptosis by caspase-9 induction. Curcumin therefore may be regarded as a potent epigenetic regulator in breast cancer.","PeriodicalId":13985,"journal":{"name":"International Journal of Green Nanotechnology","volume":"70 1","pages":"183-197"},"PeriodicalIF":0.0,"publicationDate":"2012-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76007373","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: 10
Cashew Apple Juice (Anacardium occidentale L.) Speeds Up the Synthesis of Silver Nanoparticles 腰果苹果汁(Anacardium occidental L.)加速纳米银的合成
International Journal of Green Nanotechnology Pub Date : 2012-06-15 DOI: 10.1080/19430892.2012.676900
K. Mukunthan, S. Balaji
{"title":"Cashew Apple Juice (Anacardium occidentale L.) Speeds Up the Synthesis of Silver Nanoparticles","authors":"K. Mukunthan, S. Balaji","doi":"10.1080/19430892.2012.676900","DOIUrl":"https://doi.org/10.1080/19430892.2012.676900","url":null,"abstract":"Extensive work has been done to explore the potential promises of plant systems in the synthesis of metal nanoparticles. We report here a green approach for the synthesis of silver nanoparticles with a cocktail of biochemical constituents from cashew apple juice (Anacardium occidentale L.). We presume that the reduction potential of these constituents in the crude extract plays a vital role in the bioreduction of Ag+ to Ag0. This is a facile method for the production of silver nanoparticles (AgNPs) and has many advantages over other plant extracts. The synthesized AgNPs were further characterized using ultraviolet (UV) spectrophotometry, energy-dispersive X-ray spectroscopy (EDAX), scanning electron microscopy (SEM), and X-ray diffraction (XRD) methods.","PeriodicalId":13985,"journal":{"name":"International Journal of Green Nanotechnology","volume":"45 1","pages":"71-79"},"PeriodicalIF":0.0,"publicationDate":"2012-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76325042","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: 146
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