Base de dados : MEDLINE
Pesquisa : D01.142 [Categoria DeCS]
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[PMID]:28858706
[Au] Autor:Modlitbová P; Novotný K; Porízka P; Klus J; Lubal P; Zlámalová-Gargosová H; Kaiser J
[Ad] Endereço:Central European Institute of Technology (CEITEC) Brno University of Technology, Technická 3058/10, 616 00 Brno, Czech Republic. Electronic address: Pavlina.Skarkova@ceitec.vutbr.cz.
[Ti] Título:Comparative investigation of toxicity and bioaccumulation of Cd-based quantum dots and Cd salt in freshwater plant Lemna minor L.
[So] Source:Ecotoxicol Environ Saf;147:334-341, 2018 Jan.
[Is] ISSN:1090-2414
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:The purpose of this study was to determine the toxicity of two different sources of cadmium, i.e. CdCl and Cd-based Quantum Dots (QDs), for freshwater model plant Lemna minor L. Cadmium telluride QDs were capped with two coating ligands: glutathione (GSH) or 3-mercaptopropionic acid (MPA). Growth rate inhibition and final biomass inhibition of L. minor after 168-h exposure were monitored as toxicity endpoints. Dose-response curves for Cd toxicity and EC50 values were statistically evaluated for all sources of Cd to uncover possible differences among the toxicities of tested compounds. Total Cd content and its bioaccumulation factors (BAFs) in L. minor after the exposure period were also determined to distinguish Cd bioaccumulation patterns with respect to different test compounds. Laser-Induced Breakdown Spectroscopy (LIBS) with lateral resolution of 200µm was employed in order to obtain two-dimensional maps of Cd spatial distribution in L. minor fronds. Our results show that GSH- and MPA-capped Cd-based QDs have similar toxicity for L. minor, but are significantly less toxic than CdCl . However, both sources of Cd lead to similar patterns of Cd bioaccumulation and distribution in L. minor fronds. Our results are in line with previous reports that the main mediators of Cd toxicity and bioaccumulation in aquatic plants are Cd ions dissolved from Cd-based QDs.
[Mh] Termos MeSH primário: Araceae/efeitos dos fármacos
Cloreto de Cádmio/toxicidade
Compostos de Cádmio/toxicidade
Monitoramento Ambiental/métodos
Pontos Quânticos/toxicidade
Telúrio/toxicidade
Poluentes Químicos da Água/toxicidade
[Mh] Termos MeSH secundário: Ácido 3-Mercaptopropiônico/química
Adsorção
Araceae/crescimento & desenvolvimento
Araceae/metabolismo
Biomassa
Cloreto de Cádmio/metabolismo
Compostos de Cádmio/metabolismo
Água Doce/química
Glutationa/química
Modelos Teóricos
Pontos Quânticos/metabolismo
Telúrio/metabolismo
Poluentes Químicos da Água/química
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Cadmium Compounds); 0 (Water Pollutants, Chemical); B03TJ3QU9M (3-Mercaptopropionic Acid); GAN16C9B8O (Glutathione); J6K4F9V3BA (Cadmium Chloride); NQA0O090ZJ (Tellurium); STG188WO13 (cadmium telluride)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180309
[Lr] Data última revisão:
180309
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170901
[St] Status:MEDLINE


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[PMID]:29200844
[Au] Autor:Al-Hada NM; Mohamed Kamari H; Abdullah CAC; Saion E; Shaari AH; Talib ZA; Matori KA
[Ad] Endereço:Department of Physics, Faculty of Science.
[Ti] Título:Down-top nanofabrication of binary (CdO) (ZnO) nanoparticles and their antibacterial activity.
[So] Source:Int J Nanomedicine;12:8309-8323, 2017.
[Is] ISSN:1178-2013
[Cp] País de publicação:New Zealand
[La] Idioma:eng
[Ab] Resumo:In the present study, binary oxide (cadmium oxide [CdO]) (zinc oxide [ZnO]) nanoparticles (NPs) at different concentrations of precursor in calcination temperature were prepared using thermal treatment technique. Cadmium and zinc nitrates (source of cadmium and zinc) with polyvinylpyrrolidone (capping agent) have been used to prepare (CdO) (ZnO) NPs samples. The sample was characterized by X-ray diffraction (XRD), scanning electron microscopy, energy-dispersive X-ray (EDX), transmission electron microscopy (TEM), and Fourier transform infrared (FTIR) spectroscopy. XRD patterns analysis revealed that NPs were formed after calcination, which showed a cubic and hexagonal crystalline structure of (CdO) (ZnO) NPs. The phase analysis using EDX spectroscopy and FTIR spectroscopy confirmed the presence of Cd and Zn as the original compounds of prepared (CdO) (ZnO) NP samples. The average particle size of the samples increased from 14 to 33 nm as the concentration of precursor increased from x=0.20 to x=0.80, as observed by TEM results. The surface composition and valance state of the prepared product NPs were determined by X-ray photoelectron spectroscopy (XPS) analyses. Diffuse UV-visible reflectance spectra were used to determine the optical band gap through the Kubelka-Munk equation; the energy band gap was found to decrease for CdO from 2.92 to 2.82 eV and for ZnO from 3.22 to 3.11 eV with increasing x value. Additionally, photoluminescence (PL) spectra revealed that the intensity in PL increased with an increase in particle size. In addition, the antibacterial activity of binary oxide NP was carried out in vitro against ATCC 25922 Gram (-ve), ATCC 10708, and UPMC 1175 Gram (+ve). This study indicated that the zone of inhibition of 21 mm has good antibacterial activity toward the Gram-positive UPMC 1175.
[Mh] Termos MeSH primário: Antibacterianos/farmacologia
Compostos de Cádmio/química
Nanopartículas/química
Óxidos/química
Óxido de Zinco/química
[Mh] Termos MeSH secundário: Antibacterianos/química
Bacillus subtilis/efeitos dos fármacos
Compostos de Cádmio/farmacologia
Avaliação Pré-Clínica de Medicamentos/métodos
Escherichia coli/efeitos dos fármacos
Testes de Sensibilidade Microbiana
Microscopia Eletrônica de Varredura
Microscopia Eletrônica de Transmissão
Óxidos/farmacologia
Tamanho da Partícula
Espectroscopia Fotoeletrônica
Salmonella/efeitos dos fármacos
Espectroscopia de Infravermelho com Transformada de Fourier
Difração de Raios X
Óxido de Zinco/farmacologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Anti-Bacterial Agents); 0 (Cadmium Compounds); 0 (Oxides); 0H3KWS8KJ3 (cadmium oxide); SOI2LOH54Z (Zinc Oxide)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180305
[Lr] Data última revisão:
180305
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171205
[St] Status:MEDLINE
[do] DOI:10.2147/IJN.S150405


  3 / 3522 MEDLINE  
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[PMID]:29330415
[Au] Autor:Zhou Y; Damasceno PF; Somashekar BS; Engel M; Tian F; Zhu J; Huang R; Johnson K; McIntyre C; Sun K; Yang M; Green PF; Ramamoorthy A; Glotzer SC; Kotov NA
[Ad] Endereço:School of Biomedical Engineering, School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, 325011, China. zhouyl@wibe.ac.cn.
[Ti] Título:Unusual multiscale mechanics of biomimetic nanoparticle hydrogels.
[So] Source:Nat Commun;9(1):181, 2018 01 12.
[Is] ISSN:2041-1723
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Viscoelastic properties are central for gels and other materials. Simultaneously, high storage and loss moduli are difficult to attain due to their contrarian requirements to chemical structure. Biomimetic inorganic nanoparticles offer a promising toolbox for multiscale engineering of gel mechanics, but a conceptual framework for their molecular, nanoscale, mesoscale, and microscale engineering as viscoelastic materials is absent. Here we show nanoparticle gels with simultaneously high storage and loss moduli from CdTe nanoparticles. Viscoelastic figure of merit reaches 1.83 MPa exceeding that of comparable gels by 100-1000 times for glutathione-stabilized nanoparticles. The gels made from the smallest nanoparticles display the highest stiffness, which was attributed to the drastic change of GSH configurations when nanoparticles decrease in size. A computational model accounting for the difference in nanoparticle interactions for variable GSH configurations describes the unusual trends of nanoparticle gel viscoelasticity. These observations are generalizable to other NP gels interconnected by supramolecular interactions and lead to materials with high-load bearing abilities and energy dissipation needed for multiple technologies.
[Mh] Termos MeSH primário: Hidrogéis/síntese química
Nanopartículas/química
[Mh] Termos MeSH secundário: Materiais Biomiméticos
Compostos de Cádmio/química
Glutationa/química
Fenômenos Mecânicos
Telúrio/química
Substâncias Viscoelásticas
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Cadmium Compounds); 0 (Hydrogels); 0 (Viscoelastic Substances); GAN16C9B8O (Glutathione); NQA0O090ZJ (Tellurium); STG188WO13 (cadmium telluride)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180212
[Lr] Data última revisão:
180212
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180114
[St] Status:MEDLINE
[do] DOI:10.1038/s41467-017-02579-w


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[PMID]:29300478
[Au] Autor:Li R; Sun H; Wang S; Wang Y; Yu K
[Ad] Endereço:School of Marine Sciences, Guangxi University , Nanning 530004, P. R. China.
[Ti] Título:Retention of CdS/ZnS Quantum Dots (QDs) on the Root Epidermis of Woody Plant and Its Implications by Benzo[a]pyrene: Evidence from the in Situ Synchronous Nanosecond Time-Resolved Fluorescence Spectra Method.
[So] Source:J Agric Food Chem;66(4):814-821, 2018 Jan 31.
[Is] ISSN:1520-5118
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The retention of CdS/ZnS QDs on the epidermis has been confirmed to be one of the core procedures during the root uptake process. However, the retention mechanisms of QDs on the epidermis of woody plant were poorly understood for lacking of an appropriate QD quantitative method. In this study, a novel method for in situ determination of CdS/ZnS QDs retained on the root epidermis was established using synchronous nanosecond time-resolved fluorescence spectroscopy. No correlations between K values of oleylamine-CdS/ZnS QDs retained on the epidermal tissues and the surface/bulk composition of mangrove root were observed (p > 0.05) due to the existence of endocytosis mechanisms during the QD uptake processes. Moreover, the difference of the CdS/ZnS QDs in water and further translocated to xylem/phloem of root rather than the combination with cell wall/membranes was the predominant reason that caused the K values to follow the sequence of PEG-COOH-CdS/ZnS QDs < PEG-NH -CdS/ZnS QDs ≪ oleylamine-CdS/ZnS QDs.
[Mh] Termos MeSH primário: Benzo(a)pireno
Compostos de Cádmio/análise
Raízes de Plantas/química
Pontos Quânticos/análise
Espectrometria de Fluorescência/métodos
Sulfetos/análise
Compostos de Zinco/análise
[Mh] Termos MeSH secundário: Avicennia
Compostos de Cádmio/metabolismo
Endocitose
Epiderme/química
Epiderme/metabolismo
Floema/metabolismo
Raízes de Plantas/metabolismo
Pontos Quânticos/metabolismo
Rhizophoraceae
Sulfetos/metabolismo
Água/química
Xilema/metabolismo
Compostos de Zinco/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Cadmium Compounds); 0 (Sulfides); 0 (Zinc Compounds); 057EZR4Z7Q (cadmium sulfide); 059QF0KO0R (Water); 3417WMA06D (Benzo(a)pyrene); KPS085631O (zinc sulfide)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180212
[Lr] Data última revisão:
180212
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180105
[St] Status:MEDLINE
[do] DOI:10.1021/acs.jafc.7b04258


  5 / 3522 MEDLINE  
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[PMID]:29207279
[Au] Autor:Wang L; Chen S; Ding Y; Zhu Q; Zhang N; Yu S
[Ad] Endereço:Department of Pharmacy, Jining No.1 People's Hospital, Jining 272011, Shandong, China. Electronic address: wanglijining@163.com.
[Ti] Título:Biofabrication of morphology improved cadmium sulfide nanoparticles using Shewanella oneidensis bacterial cells and ionic liquid: For toxicity against brain cancer cell lines.
[So] Source:J Photochem Photobiol B;178:424-427, 2018 Jan.
[Is] ISSN:1873-2682
[Cp] País de publicação:Switzerland
[La] Idioma:eng
[Ab] Resumo:The present work determines the anticancer activity of bio-mediated synthesized cadmium sulfide nanoparticles using the ionic liquid and bacterial cells (Shewanella oneidensis). Bacterial cells have been exposed to be important resources that hold huge potential as ecofriendly, cost-effective, evading toxic of dangerous chemicals and the alternative of conventional physiochemical synthesis. The Shewanella oneidensis is an important kind of metal reducing bacterium, known as its special anaerobic respiratory and sulfate reducing capacity. The crystalline nature, phase purity and surface morphology of biosynthesized cadmium sulfide nanoparticles were analyzed by Fourier transform infrared spectroscopy, X-ray diffraction, Field emission scanning electron microscopy, Energy dispersive spectroscopy and Transmission electron microscopy. The use of imidazolium based ionic liquids as soft templating agent for controlling self-assembly and crystal growth direction of metal sulfide nanoparticles has also advanced as an important method. The microscopic techniques showed that the nanoparticles are designed on the nano form and have an excellent spherical morphology, due to the self-assembled mechanism of ionic liquid assistance. The antitumor efficiency of the cadmium sulfide nanoparticles was investigated against brain cancer cell lines using rat glioma cell lines. The effectively improved nano-crystalline and morphological structure of CdS nanoparticles in the presence of IL exhibit excellent cytotoxicity and dispersion ability on the cell shape is completely spread out showing a nice toxic environment against cancer cells. The cytotoxicity effect of cadmium sulfide nanoparticles was discussed with a diagrammatic representation.
[Mh] Termos MeSH primário: Compostos de Cádmio/química
Líquidos Iônicos/química
Nanopartículas Metálicas/química
Shewanella/química
Sulfetos/química
[Mh] Termos MeSH secundário: Animais
Neoplasias Encefálicas/metabolismo
Neoplasias Encefálicas/patologia
Linhagem Celular Tumoral
Sobrevivência Celular/efeitos dos fármacos
Líquidos Iônicos/metabolismo
Nanopartículas Metálicas/toxicidade
Microscopia Eletrônica de Varredura
Microscopia Eletrônica de Transmissão
Oxirredução
Ratos
Shewanella/metabolismo
Espectrometria por Raios X
Espectroscopia de Infravermelho com Transformada de Fourier
Difração de Raios X
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Cadmium Compounds); 0 (Ionic Liquids); 0 (Sulfides); 057EZR4Z7Q (cadmium sulfide)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180212
[Lr] Data última revisão:
180212
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171206
[St] Status:MEDLINE


  6 / 3522 MEDLINE  
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[PMID]:28599858
[Au] Autor:Shalan H; Kato M; Cheruzel L
[Ad] Endereço:San José State University, Department of Chemistry, One Washington Square, San José, CA, United States.
[Ti] Título:Keeping the spotlight on cytochrome P450.
[So] Source:Biochim Biophys Acta;1866(1):80-87, 2018 01.
[Is] ISSN:0006-3002
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:This review describes the recent advances utilizing photosensitizers and visible light to harness the synthetic potential of P450 enzymes. The structures of the photosensitizers investigated to date are first presented along with their photophysical and redox properties. Functional photosensitizers range from organic and inorganic complexes to nanomaterials as well as the biological photosystem I complex. The focus is then on the three distinct approaches that have emerged for the activation of P450 enzymes. The first approach utilizes the in situ generation of reactive oxygen species entering the P450 mechanism via the peroxide shunt pathway. The other two approaches are sustained by electron injections into catalytically competent heme domains either facilitated by redox partners or through direct heme domain reduction. Achievements as well as pitfalls of each approach are briefly summarized. This article is part of a Special Issue entitled: Cytochrome P450 biodiversity and biotechnology, edited by Erika Plettner, Gianfranco Gilardi, Luet Wong, Vlada Urlacher, Jared Goldstone.
[Mh] Termos MeSH primário: Sistema Enzimático do Citocromo P-450/química
Elétrons
Escherichia coli/enzimologia
Heme/química
Complexos de Proteínas Captadores de Luz/química
Fármacos Fotossensibilizantes/química
[Mh] Termos MeSH secundário: Biocatálise
Compostos de Cádmio/química
Sistema Enzimático do Citocromo P-450/metabolismo
Amarelo de Eosina-(YS)/química
Amarelo de Eosina-(YS)/metabolismo
Escherichia coli/química
Escherichia coli/efeitos da radiação
Heme/metabolismo
Luz
Complexos de Proteínas Captadores de Luz/metabolismo
Modelos Moleculares
Oxirredução
Peróxidos/química
Peróxidos/metabolismo
Fármacos Fotossensibilizantes/metabolismo
Estrutura Secundária de Proteína
Pontos Quânticos
Sulfetos/química
Superóxidos/química
Superóxidos/metabolismo
Tioglicolatos/química
Tioglicolatos/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, N.I.H., EXTRAMURAL; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.; REVIEW
[Nm] Nome de substância:
0 (Cadmium Compounds); 0 (Light-Harvesting Protein Complexes); 0 (Peroxides); 0 (Photosensitizing Agents); 0 (Sulfides); 0 (Thioglycolates); 057EZR4Z7Q (cadmium sulfide); 11062-77-4 (Superoxides); 42VZT0U6YR (Heme); 7857H94KHM (2-mercaptoacetate); 9035-51-2 (Cytochrome P-450 Enzyme System); TDQ283MPCW (Eosine Yellowish-(YS))
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180208
[Lr] Data última revisão:
180208
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170611
[St] Status:MEDLINE


  7 / 3522 MEDLINE  
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[PMID]:27775240
[Au] Autor:Yehezkeli O; Bedford NM; Park E; Ma K; Cha JN
[Ad] Endereço:Department of Chemical and Biological Engineering, University of Colorado, Boulder, USA.
[Ti] Título:Semiconductor-Based, Solar-Driven Photochemical Cells for Fuel Generation from Carbon Dioxide in Aqueous Solutions.
[So] Source:ChemSusChem;9(22):3188-3195, 2016 11 23.
[Is] ISSN:1864-564X
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:There has been active interest to identify new methods to reduce CO into usable fuel sources. In this work, we demonstrate two types of photo-electrochemical cells (PECs) that photoreduce CO directly to formate in aqueous solutions both in the presence and absence of external bias or additional electron sources. The photocathodes were either a CuFeO /CuO electrode or a bilayer of CdTe on NiO, whereas the photoanode was a bilayer of NiO on CdS. The PECs were characterized by using both electrochemistry and spectroscopy, and the products formed from CO reduction were characterized and quantified by using H NMR spectroscopy and ESI-MS. In addition, an organohydride catalyst was tested in conjunction with the PECs, which not only showed a significant gain of 85 times in CO reduction (27 µm formate without the catalyst, 2.3 mm formate with it) compared to the NiO/CdTe photocathode system but could also generate methanol under an external bias (10 µm).
[Mh] Termos MeSH primário: Dióxido de Carbono/química
Fontes de Energia Elétrica
Processos Fotoquímicos
Semicondutores
Luz Solar
Água/química
[Mh] Termos MeSH secundário: Compostos de Cádmio/química
Eletroquímica
Níquel/química
Oxirredução
Soluções
Telúrio/química
Compostos de Estanho/química
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
[Nm] Nome de substância:
0 (Cadmium Compounds); 0 (Solutions); 0 (Tin Compounds); 059QF0KO0R (Water); 142M471B3J (Carbon Dioxide); 71243-84-0 (indium tin oxide); 7OV03QG267 (Nickel); C3574QBZ3Y (nickel monoxide); NQA0O090ZJ (Tellurium); STG188WO13 (cadmium telluride)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:180117
[Lr] Data última revisão:
180117
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161025
[St] Status:MEDLINE
[do] DOI:10.1002/cssc.201601105


  8 / 3522 MEDLINE  
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[PMID]:28747004
[Au] Autor:Chen X; Ok YS; Mohan D; Pittman CU; Dou X
[Ad] Endereço:College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, PR China.
[Ti] Título:The stability and removal of water-dispersed CdSe/CdS core-shell quantum dots from water.
[So] Source:Chemosphere;185:926-933, 2017 Oct.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The increasingly wide use of semiconductor nanocrystals inevitably leads to their release into aquatic environment. The aggregation behaviors of 3-mercaptopropionic acid-capped CdSe/CdS core-shell quantum dots (MPA-QDs) under various water chemistry conditions were examined and their removal using Fe and Al coagulants was evaluated. Cationic species rather than concentrations affected the stability of MPA-QDs. Adding 2 mM Ca led to a much larger ζ-potential decrease and particle size increase than adding 150 mM K at each tested solution pH. This indicated that complexation and depletion of surface-bound carboxyl groups by divalent Ca has a more pronounced effect than compression of the electrical double layer by high concentrations of monovalent K . The presence of humic acid increased the stability of MPA-QDs, which might increase negative surface charging via overcoating or bind to the surface of MPA-QDs. The nanoparticles exhibited similar aggregation kinetics patterns in tap water and seawater, but varying patterns in the lake water because of the co-existence of 2.3 mM total of Ca and Mg . MPA-QDs (5 mg L ) were readily coagulated by 2.4 mM Al or 1.2 mM Fe in tap water. Al and Fe can bind with carboxyl groups of the surface capping ligands, neutralize the negative charges on the surface of MPA-QDs and decrease the electrostatic repulsion forces to induce MPA-QDs aggregation. In addition, MPA-QDs could be bound with and wrapped into the flocs of hydrolysis products of coagulants. The results reported here could help broaden our understanding of the impacts and remediation of water-dispersed core-shell QD nanoparticles.
[Mh] Termos MeSH primário: Compostos de Cádmio/química
Pontos Quânticos/química
Poluentes Químicos da Água/química
Purificação da Água/métodos
[Mh] Termos MeSH secundário: Ácido 3-Mercaptopropiônico/química
Concentração de Íons de Hidrogênio
Ligantes
Nanopartículas
Tamanho da Partícula
Pontos Quânticos/análise
Água/química
Poluentes Químicos da Água/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Cadmium Compounds); 0 (Ligands); 0 (Water Pollutants, Chemical); 059QF0KO0R (Water); B03TJ3QU9M (3-Mercaptopropionic Acid)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:180110
[Lr] Data última revisão:
180110
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170728
[St] Status:MEDLINE


  9 / 3522 MEDLINE  
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[PMID]:28455616
[Au] Autor:Raj R; Das S
[Ad] Endereço:Department of Life Science, National Institute of Technology, Rourkela, Odisha, 769008, India.
[Ti] Título:Development and application of anticancer fluorescent CdS nanoparticles enriched Lactobacillus bacteria as therapeutic microbots for human breast carcinoma.
[So] Source:Appl Microbiol Biotechnol;101(13):5439-5451, 2017 Jul.
[Is] ISSN:1432-0614
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Applications of probiotic bacteria and nanoparticles (NPs) as therapeutic agents have great importance. This study demonstrates a combinatorial approach of both the probiotic Lactobacillus spp. (Lactobacillus fermentum and Lactobacillus plantarum) with fluorescent cadmium sulfide (CdS) NPs as therapeutic agents to target MCF-7 cancer cells (human breast cancer cells). In this study, facultative anaerobic Lactobacillus was successfully used as a vehicle to transport NPs into MCF-7 cancer cells. The cell viability assay and invasion study along with confocal and field emission scanning electron microscopy (FESEM) confirmed the release of payload (CdS NPs) into cytoplasm without any external stimuli. The biosynthesized CdS NPs of ∼22 nm were characterized by FESEM, transmission electron microscopy (TEM), atomic force microscopy (AFM), and fluorescence spectroscopy. The bacteria-NPs (microbots) interaction was investigated by growth curve studies, attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR), FESEM, energy dispersive X-ray spectroscopy (EDX), and fluorescence and confocal microscopy. This alternative approach showed an approved and inexpensive delivering mode of specific functional cargos or therapeutic agents into the cancer cells.
[Mh] Termos MeSH primário: Neoplasias da Mama/terapia
Compostos de Cádmio/administração & dosagem
Lactobacillus fermentum
Lactobacillus plantarum
Nanopartículas Metálicas/administração & dosagem
Sulfetos/administração & dosagem
[Mh] Termos MeSH secundário: Compostos de Cádmio/química
Compostos de Cádmio/farmacologia
Sobrevivência Celular/efeitos dos fármacos
Sistemas de Liberação de Medicamentos/métodos
Feminino
Fluorescência
Seres Humanos
Células MCF-7
Nanopartículas Metálicas/química
Microscopia de Força Atômica
Microscopia Eletrônica de Varredura
Microscopia Eletrônica de Transmissão
Microtecnologia/métodos
Espectrometria de Fluorescência
Espectrometria por Raios X
Espectroscopia de Infravermelho com Transformada de Fourier
Sulfetos/química
Sulfetos/farmacologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Cadmium Compounds); 0 (Sulfides); 057EZR4Z7Q (cadmium sulfide)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180104
[Lr] Data última revisão:
180104
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170430
[St] Status:MEDLINE
[do] DOI:10.1007/s00253-017-8298-1


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[PMID]:29031452
[Au] Autor:Wen J; Ma C; Huo P; Liu X; Wei M; Liu Y; Yao X; Ma Z; Yan Y
[Ad] Endereço:School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China. Electronic address: wenjiangshu@sina.cn.
[Ti] Título:Construction of vesicle CdSe nano-semiconductors photocatalysts with improved photocatalytic activity: Enhanced photo induced carriers separation efficiency and mechanism insight.
[So] Source:J Environ Sci (China);60:98-107, 2017 Oct.
[Is] ISSN:1001-0742
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Visible-light-driven photocatalysis as a green technology has attracted a lot of attention due to its potential applications in environmental remediation. Vesicle CdSe nano-semiconductor photocatalyst are successfully prepared by a gas template method and characterized by a variety of methods. The vesicle CdSe nano-semiconductors display enhanced photocatalytic performance for the degradation of tetracycline hydrochloride, the photodegradation rate of 78.824% was achieved by vesicle CdSe, which exhibited an increase of 31.779% compared to granular CdSe. Such an exceptional photocatalytic capability can be attributed to the unique structure of the vesicle CdSe nano-semiconductor with enhanced light absorption ability and excellent carrier transport capability. Meanwhile, the large surface area of the vesicle CdSe nano-semiconductor can increase the contact probability between catalyst and target and provide more surface-active centers. The photocatalytic mechanisms are analyzed by active species quenching. It indicates that h and O are the main active species which play a major role in catalyzing environmental toxic pollutants. Simultaneously, the vesicle CdSe nano-semiconductor had high efficiency and stability.
[Mh] Termos MeSH primário: Compostos de Cádmio/química
Modelos Químicos
Processos Fotoquímicos
Compostos de Selênio/química
Semicondutores
[Mh] Termos MeSH secundário: Nanoestruturas
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Cadmium Compounds); 0 (Selenium Compounds)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171019
[Lr] Data última revisão:
171019
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171017
[St] Status:MEDLINE



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