hence although kylie s choice of words may not appear funny her much wider and more creative range of emoticons compared to beiyie s aided in the performance of an expressive and fun personality her niceness was also fairly evident because even

Synthesis of water soluble bimetallic nanoclusters with multifunctionalities

Ngày tải lên : 01/10/2015, 17:27

... Photoemission (solid lines) and photoexcitation (dashed lines) spectra of the as-synthesized luminescent Au15@Ag NCs (b) and Au25@Ag NCs (c) (Insets) Digital photos of the as-synthesized luminescent ... Thiol-Etching of bi-MNPs for the Synthesis of Bi-MNCs Another strategy for synthesizing bi-MNCs is to use thiolate ligands as etchants to digest the relatively large-sized bi-MNPs This method relies ... ligands The lacking of studies in such aspects may largely affect the advances of bi-MNCs in biomedical applications There is therefore of significant interest in developing efficient synthesis...

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synthesis and optical properties of au-ag alloy nanoclusters with controlled composition, p26

Ngày tải lên : 04/06/2014, 15:20

... real part of the sum of the scattering coefficients an and bn, and are function of particle radius, and light wavelength λ (in terms of the Ricatti-Bessel functions) As the absorption band of noble ... properties [1-5] and subsequent technological applications such as catalysts, sensors, nanoelectronic devices [6-13] and biosensors [14] The properties and hence the applicability of these nanoparticles ... 1/9) and their respective size distribution histograms are presented For the histograms, the size of more than 60 particles was measured The images reveal the formation of nearly spherical nanometric...

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Báo cáo hóa học: " Laser-Induced, Polarization Dependent Shape Transformation of Au/Ag Nanoparticles in Glass" docx

Ngày tải lên : 22/06/2014, 00:20

... particles of about 60.4 nm diameter (these diameters refer to spheres of the same volume as the spheroids have) The total increase in particle size compared to the initial situation in the sample ... a factor of 3, but also the size distribution has become a little bit narrower and lost part of its asymmetry, and, what is the important issue in this result, shape and arrangement of the particles ... particles deviate from the previous isotropic appearance On the other hand the optical absorption remains fairly constant or even decreases indicating that the total amount of silver and gold does not...

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Tài liệu Câu hỏi trắc nghiệm phần kim loại Au, Ag luyện thi ppt

Ngày tải lên : 24/12/2013, 18:15

... n s i màu: A T tr ng sang vàng C T xanh sang vàng B T l c sang vàng D Luôn có màu vàng Câu 65: H p kim c a vàng - b c - ng (50 - 87,5% Au ; 8,3 - 33,3%Ag ; 4,2 - 16,7%Cu) có ng d ng: A trang s ... hàn Câu 69: Vàng có th tan c dung d ch: A nư c cư ng toan, dd KCN C dd HCl,dd HNO3 B nư c cư ng toan, dd HNO3 D dd NaNO3 HCl, dd H2SO4 c nóng Câu 70: i n phân dd AuCl3 v i anot b ng Au , ngư i ta ... Ag 2S, c n dung thêm : A dd HNO3 c Zn C dd H2SO4 c nóng Zn B dd NaCN Zn D dd HCl Zn Câu 54: Vàng kim lo i ho t ng không tan axit k c HNO3 H2SO4 c nóng vàng tan dd nư c cư ng toan ch a: A H2SO4...

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Tài liệu Câu hỏi trắc nghiệm phần kim loại Au - Ag pptx

Ngày tải lên : 25/01/2014, 20:20

... n s i màu: A T tr ng sang vàng C T xanh sang vàng B T l c sang vàng D Luôn có màu vàng Câu 65: H p kim c a vàng - b c - ng (50 - 87,5% Au ; 8,3 - 33,3%Ag ; 4,2 - 16,7%Cu) có ng d ng: A trang s ... hàn Câu 69: Vàng có th tan c dung d ch: A nư c cư ng toan, dd KCN C dd HCl,dd HNO3 B nư c cư ng toan, dd HNO3 D dd NaNO3 HCl, dd H2SO4 c nóng Câu 70: i n phân dd AuCl3 v i anot b ng Au , ngư i ta ... Ag 2S, c n dung thêm : A dd HNO3 c Zn C dd H2SO4 c nóng Zn B dd NaCN Zn D dd HCl Zn Câu 54: Vàng kim lo i ho t ng không tan axit k c HNO3 H2SO4 c nóng vàng tan dd nư c cư ng toan ch a: A H2SO4...

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Báo cáo khóa học: Human PABP binds AU-rich RNA via RNA-binding domains 3 and 4 pdf

Ngày tải lên : 23/03/2014, 12:20

... RRM domains and 2, and RRM domains and 4, respectively (Fig 3) The Fig Detection of an AU-binding protein by UV crosslinking assay and identiﬁcation as PABP (A) UV crosslinking assays were performed ... extracts was also seen Digestion of the crosslinked complexes with RNase A converted both bands to a single species migrating at 79 kDa, suggesting both bands are derived from the same protein ... results from binding to domains and 2, but that these domains not contribute much to the binding of AU-rich RNA In contrast, PABP34, containing just domains and 4, bound the AU4 RNA almost as...

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chuyên đề về Cr - Fe - Cu - Ni - Pb - Zn - Au - Ag - Sn

Ngày tải lên : 18/06/2015, 18:51

... 1s2 2s2 2p6 3s2 3p6 4s2 3d3 B 1s2 2s2 2p6 3s2 3p63d5 C 1s2 2s2 2p6 3s2 3p63d6 D 1s2 2s2 2p6 3s2 3p63d6 4s2 2+ b Cấu hình electron X A 1s2 2s2 2p6 3s2 3p6 4s2 3d3 B 1s2 2s2 2p6 3s2 3p63d5 2 6 C 1s 2s 2p 3s 3p 3d D 1s 2s2 2p6 3s2 3p63d6 4s2 c Vị ... = 29), cấu hình electron nguyên tử đồng là: A 1s2 2s2 2p6 3s2 3p6 4s2 3d9 B 1s2 2s2 2p6 3s2 3p6 4s1 3d10 2 6 C 1s 2s 2p 3s 3p 3d 4s D 1s2 2s2 2p6 3s2 3p63d10 4s1 Câu 238: Phát biểu không vị trí đồng bảng tuần ... dung dịch axit H2SO4 đặc, nóng đến phản ứng xảy hoàn to n, thu dung dịch Y phần Fe không tan Chất tan có dung dịch Y A MgSO4 FeSO4 B MgSO4 C MgSO4 Fe2(SO4)3 D MgSO4, Fe2(SO4)3 FeSO4 Câu 107: Cho...

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Coupling effects of NaYF4Yb,Er upconversion nanoshells and au ag metallic nanoshells 1

Ngày tải lên : 10/09/2015, 09:08

... fluorescence issues, the effects of surface, surface coatings, and plasmonic on the fluorescence of the UC nanoshells were systematically studied This thesis includes the followings: Synthesis of NaYF4:Yb,Er ... fluorescence of the NaYF4:Yb,Er nanoshells were investigated 1.6 Outline of the thesis The outline of this thesis is as follows: Synthesis and characterization of NaYF4:Yb,Er nanoshells and the ... by the sensitizer to facilitate the energy transfer steps Doping concentration of lanthanide ions is also essential since it affects the distance between the dopant ions in the hosts, assuming...

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Coupling effects of NaYF4Yb,Er upconversion nanoshells and au ag metallic nanoshells 2

Ngày tải lên : 10/09/2015, 09:08

... 2.3 Assembly of Au-Ag nanoshells and UC nanoshells To study the plasmonic effects of Au-Ag nanoshells on fluorescence properties of UC nanoshells, single layer of Au-Ag nanoshells on glass substrates ... X-ray striking a sample is scattered by the atoms in the sample The scattered intensity of the X-ray is collected as a function of the incident and scattered angle In this thesis, the crystal structures ... UC nanoshells was used to fabricate all the assemblies in this study The effects of the Au-Ag surface coverage on the fluorescence of the UC nanoshells were studied To investigate the distance-dependent...

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Coupling effects of NaYF4Yb,Er upconversion nanoshells and au ag metallic nanoshells 3

Ngày tải lên : 10/09/2015, 09:09

... respectively In this study, these UC nanostructures were stabilized using the same surfactant (oleylamine) and dispersed in hexane Therefore, the significant decrease of emission intensity from the solid ... This explains the decrease of the emission intensity of UC nanoshells compared to solid NaYF4 core/UC shell The solid UC nanoparticles showed the highest emission intensity since these particles ... temperatures and reaction time to understand the formation mechanism of the UC nanoshells During the synthesis process of 50 UC nanoshells, the samples of were collected from 300 to 340 oC and to...

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Coupling effects of NaYF4Yb,Er upconversion nanoshells and au ag metallic nanoshells 4

Ngày tải lên : 10/09/2015, 09:09

... centrifugation and washing The composition of the Au measured by the EDX was similar to the results determined by XPS Both the experimental results by the EDX and XPS analysis showing a sharp increase of the ... surface can decrease the surface energy of the system The de-alloying process of Ag in Au-Ag nanoshells would start by dissolution of Ag atoms at the surface of the nanoshells as the surface atoms have ... than the latter nanoshells Further, the surface energy of Ag is less than that of Au, which Ag more likely diffuses to the surface of Au-Ag particles rather than Au as more Ag atoms at the surface...

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Coupling effects of NaYF4Yb,Er upconversion nanoshells and au ag metallic nanoshells 5

Ngày tải lên : 10/09/2015, 09:09

... on the substrate were viewed from side of the nanoshells It assumed the interior cavity of the nanoshells was filled with toluene, which was used as a solvent in synthesis of the nanoshells as ... Au-Ag nanoshells lying down on the substrate were viewed from side of the nanoshells This assembly was used to study the plasmonic effects of Au-Ag nanoshells on the fluorescence of UC nanoshells ... distributed to cover the substrate surface and most of the nanoshells appeared to form a single layer on the substrate The nanoshells were closer with each other with increasing number of coating...

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Coupling effects of NaYF4Yb,Er upconversion nanoshells and au ag metallic nanoshells 6

Ngày tải lên : 10/09/2015, 09:09

... to investigate the plasmonic effects of Au-Ag nanoshells on the fluorescence of UC nanoshells This study showed the fluorescence of the UC nanoshells was either enhanced or quenched by Au-Ag nanoshells, ... mechanism However, the diffusion of ions in the host during the formation of such small nanoshells is not yet well-understood yet The diffusion of ions should be investigated in future study This ... nanoshells and Au-Ag nanoshells and the concentration of Au-Ag nanoshells on the substrates However, the UC fluorescence quenching efficiency due to non-radiative losses to Au-Ag nanoshells was...

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Optical limiting properties of GO PVA and AU AG PMMA free standing films

Ngày tải lên : 30/09/2015, 10:11

... GO sheets contain sp3 domains and sp2 domains With the increasing of sp2 domains, the nonradiative recombination also increased.24 Furthermore, because of the complex energy band structures, ... Nengyue and Mr Polavarapu Lakshminarayana contributed a lot to this thesis I am also grateful to all the members of Ultrafast Spectroscopy for their kind support and assistance I am also thankful to ... melting/vaporization of surface atoms and the expanded particles act as another type of scattering center and limit the light transmission during the laser pulse duration In this work, we have prepared oleylamine-capped...

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Preparation of au ag alloy nanoparticles for surface enhanced raman scattering

Ngày tải lên : 24/10/2016, 15:21

... contamination These Au-Ag alloy NPs were used to fabricate nanostructure substrates for SERS measurements Rohdamine 6G was chosen as a tested analysis to investigate Raman scattering enhancement ... atoms and clusters The hot released atoms and clusters have a strong tendency to rapidly recombine into Au-Ag alloy particles on a nanosecond time scale [20] Also, single atoms or small clusters ... of the SERS substrate after some minutes SERS spectra were observed by Micro-Raman spectrophotometer (LabRAM HR) Results and discussion 3.1 Preparation of Ag, Au NPs and Au-Ag alloy NPs The absorption...

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Tài liệu Human-induced changes in US biogenic volatile organic compound emissions: evidence from long-term forest inventory data ppt

Ngày tải lên : 14/02/2014, 08:20

... plantations The decrease in monoterpene emissions in SC and GA was caused by a loss of several pine species from natural forests (from harvesting and succession, Fig 4), and by loss of slash pine (Pinus ... BVOC emissions: South Carolina and Georgia (SC and GA), and the deep south (deﬁned here as Alabama, Arkansas, Louisiana, and Mississippi) As Fig shows, in both cases the rapid increases in isoprene ... Appalachians and the Pinelands of the southeastern coastal plain (Pines tend to emit monoterpenes) Between the mid-198 0s and the mid-199 0s, there were systematic increases in the basal area of both isoprene-...

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Báo cáo khoa học: Small heat shock protein Hsp27 prevents heat-induced aggregation of F-actin by forming soluble complexes with denatured actin docx

Ngày tải lên : 16/03/2014, 06:20

... functions of sHSPs in muscles is their interaction with actin Many investigations [4,15] have been devoted to analyses of this interaction The most contradictory results were obtained in studies on the ... is much less than that of intact F-actin We suppose that this is the mechanism by which sHSPs prevent the aggregation of F-actin during its thermal denaturation In many respects, this mechanism ... phosphorylate sHSPs, and by this means might affect their oligomeric structure and chaperone activity [3,4,12] Expression of some sHSPs is increased in response to different kinds of injury, such...

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Báo cáo khoa học: Cd2+-induced aggregation of Escherichia coli pyrophosphatase doc

Ngày tải lên : 23/03/2014, 13:20

... PPase possesses three types of metal-binding sites Type sites, of which there are two per monomer in the absence of substrate, are found in the active site cavity and are not involved in intersubunit ... out the involvement of type and type sites in Cd2+-induced aggregation by testing the effects of Mg2+ and Mn2+ Both of these divalent cations bind to type and sites, with dissociation constants ... effects of Cd2+, indicates that aggregation is caused by Cd2+ binding to sites other than types and The lack of competition between Cd2+ and the other metal ions in inducing aggregation suggested...

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Báo cáo khoa học: Full-length adiponectin protects hepatocytes from palmitate-induced apoptosis via inhibition of c-Jun NH2 terminal kinase doc

Ngày tải lên : 29/03/2014, 23:20

... veriﬁed the signaling pathway of AMPK-ER stress-induced cell death using compound c, as an AMPK inhibitor, and wortmannin, as a PI3 kinase inhibitor In the absence of adiponectin, thapsigargin and ... decreased insulin signaling and sensitivity [19] The effect of adiponectin, an antidiabetic adipokine, has also been suggested to involve the PI3 kinase ⁄ Akt signaling pathway, and the ability of PI3 ... oxidative stress, or a second effect, in addition to hepatic steatosis and abnormal apoptosis [3] Hepatic apoptosis is present in patients with high calorie-induced hepatic steatosis and correlates with...

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Báo cáo khoa học: Identiﬁcation and characterization of a collagen-induced platelet aggregation inhibitor, triplatin, from salivary glands of the assassin bug, Triatoma infestans ppt

Ngày tải lên : 30/03/2014, 10:20

... proteins in salivary glands, showing that both triplatin-1 and -2 are indeed expressed there SDS ⁄ PAGE and western blot analysis indicated that triplatin-1 and -2 are major proteins of T infestans ... vessels of host animals It is likely that triplatin-1 and -2 are injected into the host during T infestans blood feeding and attenuate host hemostasis at the initial phase To date, some other inhibitors ... Biotechnology, Inc., Rockford, IL, USA) using bovine c-globulin as the standard Isolation and sequencing of cDNA clones Salivary glands of T infestans were dissected from thoraces of unfed adults, and poly...

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