Hui ying Yuan

• china at changqing oilfield company

Graphdiyne-based materials are promising candidates for the adsorption and detection of heavy metal ions (HMIs) as the acetylenic links in graphdiyne strongly interact with some metal ions. To improve the sensing performance of graphdiyne-based materials and further understand their detection mechanism, we prepared N-substituted graphdiyne (TGDY) t...

Fluorinated and nitrogen-doped graphdiyne (F/N-GDY) have been used in the active layer of perovskite solar cells (PSCs) for the first time. The introduction of heteroatoms turns out to be an effective method for boosted solar cells performance, which increases by 32.8% and 33.0%, better than the pristine or GDY doped PSCs. The enhanced performance...

In this work, graphdiyne, a new kind of carbon allotrope composed of sp and sp² hybridized carbon atoms, firstly worked as an effective electrochemical sensor for the determination of low concentration of Cd²⁺ and Pb²⁺ in water using electrochemical pre-enrichment and anodic-stripping voltammetry methods. The limit of detection was 0.46 nM for Cd²⁺...

In this work, a novel chelating adsorbent, 2, 4-dithiobiuret-reduced graphene oxide composite (DTB-RGO), was synthesized and worked as an electrochemical sensor for the determination of Pb²⁺. X-ray photoemission spectroscopy, Raman spectroscopy and Fourier transform-infrared spectroscopy were used to confirm the successful doping of the aminothiour...

Background: The first human infections of novel avian influenza A(H7N9) virus were identified in China in March 2013. Sentinel surveillance systems and contact tracing may not identify mild and asymptomatic human infections of influenza A(H7N9) virus. Objectives: We assessed the seroprevalence of antibodies to influenza A(H7N9) virus in three po...

Fullerene, C60, and its derivatives, have been fully investigated and commercialized. The importance of large carbon cage-based fullerenes for biomedical applications was gradually recognized due to their fantastic biological effects. In nanotoxicology, the key detection techniques are able to retain the intrinsic structure and properties of nanoma...

With a bigger birefringence than calcite, sodium nitrate (NaNO3) single crystal might have potential applications in fiber-optic polarizer, opto-isolators and polarizing prisms. However, it is difficult to grow large-size NaNO3 crystals for their thermal conductivity anisotropy and phase transition at 275°C. In this paper, crack-free NaNO3 crystals...

Following the first human infection with the influenza A (H10N8) virus in Nanchang, China in December 2013, we identified two additional patients on January 19 and February 9, 2014. The epidemiologic, clinical, and virological data from the patients and the environmental specimen collected from 23 local live poultry markets (LPMs) were analyzed. Th...

The recent emergence of human infection with influenza A(H10N8) virus is an urgent public health concern. Genomic analysis showed that the virus was conserved in chicken eggs but presented substantial adaptive mutations in MDCK cells. Our results provide additional evidence for the avian origin of this influenza virus.

Background: The majority of human cases of novel avian influenza A(H7N9), which emerged in China in spring 2013, include reported exposure to poultry. However, specific host and exposure risk factors for disease are unknown, yet critical to design prevention measures. Methods: In April-June 2013, we conducted a case-control study in 8 Chinese pr...

Human infections with different avian influenza viruses-eg, H5N1, H9N2, and H7N9-have raised concerns about pandemic potential worldwide. We report the first human infection with a novel reassortant avian influenza A H10N8 virus. We obtained and analysed clinical, epidemiological, and virological data from a patient from Nanchang City, China. Trach...

Concerns over the biosafety of carbon nanomaterials have been raised, due to their unique structure, properties and applications. However, a lack of easily accessible quantification methods for in vivo carbon nanomaterials largely limits the evaluation of their biosafety. Here, for the first time we adopted 13C stable isotopic labeling for the quan...

As the nanomaterial fullerenol has attracted much attention in various fields, there is a need to develop convenient and effective detection methods for its determination. In this paper, the polyclonal antibody against fullerenol was obtained by immunization of rabbits with the fullerenol protein conjugate. Based on this new antibody against fuller...

Bismuth silicate (Bi4Si3O12, BSO) crystals including and excluding segregation layers have been grown by the Bridgman method. The morphology and composition of segregation layers existing in the defective crystal were investigated, and the crystallization habit of BSO crystal was discussed. In order to grow large size BSO crystals, several growth t...

To conduct a full genome sequence analysis for genetic characterization of an H3N8 influenza virus isolated from drinking water of a domestic duck farm in Poyang Lake area in 2011. The virus was cultivated by specific pathogen free (SPF) chicken embryo eggs and was subtyped into hemagglutinin (HA) and neuraminidase (NA) by real-time PCR method. Eig...

We present new quasars discovered in the vicinity of the Andromeda and Triangulum galaxies with the Large Sky Area Multi-Object Fiber Spectroscopic Telescope, also named the Guoshoujing Telescope, during the 2010 and 2011 observational seasons. Quasar candidates are selected based on the available Sloan Digital Sky Survey, Kitt Peak National Observ...

A colorimetric probe for the detection of copper(ii) ions in aqueous media by the naked eye has been developed based on a supramolecular complex comprised of a cationic polythiophene derivative and ATP with a detection limit as low as 0.05 mM.

Water-soluble malonate multiadducts of paramagnetic gadolinium endohedral metallofullerene, Gd@C82[C(COOH)2]6 and Gd@C82[C(COOH)2]8, were synthesized by Bingel-Hirsch reaction. Gd@C82 was firstly reacted with diethyl bromomalonate in the presence of alkali metal hydride to produce malonic ester multiadducted derivatives, Gd@C82[C(COOCH2CH3)2]x (x =...

Bi doped and Yb–Bi co-doped PWO crystals were prepared by Bridgman method. The absorption, photoluminescence and near-infrared (NIR) emission spectra were measured at room temperature. No NIR emission was detected in Bi doped PWO crystal even after γ-ray irradiation. Two isolated emissions peaking at 1360 nm and 1570 nm were observed in Yb–Bi co-do...

Surface functionalized gold nanorods (GNRs) with three optical signals and the ability to track and observe live cells was investigated. The Cetyltrimethyl Ammonium Bromide (CTAB) was used as the shape-directing agent to develop GNRs with uniform size and aspect ratio. The as-synthesized GNRs can strongly enhance the Raman signal of the attached MG...

The Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST, also called the Guo Shou Jing Telescope) is a special reflecting Schmidt telescope. LAMOST's special design allows both a large aperture (effective aperture of 3.6 m–4.9 m) and a wide field of view (FOV) (5°). It has an innovative active reflecting Schmidt configuration which co...

This paper describes the data release of the LAMOST pilot survey, which includes data reduction, calibration, spectral analysis, data products and data access. The accuracy of the released data and the information about the FITS headers of spectra are also introduced. The released data set includes 319 000 spectra and a catalog of these objects.

Several Er doped (0.2 at%, 0.5 at%, and 1.0 at%) PbWO4 single crystals were grown by Bridgman method with the size of Φ20 × 100 mm. The absorption spectra of Er:PWO samples were measured to investigate the spectral properties of Er3+ ions according to Judd-Ofelt theory. The phenomenological intensity parameters Ωλ were fitted to calculate the spect...

Unlabelled: The purpose of this work is to study the antimetastasis activity of gadolinium metallofullerenol nanoparticles (f-NPs) in malignant and invasive human breast cancer models. We demonstrated that f-NPs inhibited the production of matrix metalloproteinase (MMP) enzymes and further interfered with the invasiveness of cancer cells in tissue...

We have studied for the first time the structural change of high-purity metallofullerene (Gd@C(82)) upon heat treatment in an ultra-high vacuum system (10(-10) Torr) and examined the decomposition product through successive analysis with MS, IR, Raman, TEM, EDS and XPS. It was found that metallofullerene (Gd@C(82)) had fully collapsed at 580 °C whi...

Lead tungstate, PbWO4 single crystals co-doped with Mo⁶⁺ and Sb³⁺ ions were grown using the modified Bridgman method. The X-ray powder diffraction, optical transmission, X-ray excited luminescence, photoluminescence, light output and decay time have been investigated. Compared to non-doped PbWO4, the co-doped PbWO4:(Mo,Sb) crystals exhibit improved...

The present study developed a novel, fast and efficient method to synthesize one dimensional nanotube-based materials via supercritical reactions and supercritical fluids. It was proved that supercritical organic fluids were good media to take materials into the nanocavity, not only as solvents but also as reaction agents. Different kinds of metals...

The structural and electronic properties of Gd@C82 adsorbed on Cu(111) and Cu(100) surfaces were investigated by scanning tunneling microscopy (STM). STM images showed that the lattice structure of the underlying metal substrates affected the arrangement of the metallofullerene molecules. Preferred adsorption orientations of the molecules were foun...

We report here a simple method to fabricate the silver nanoparticles (AgNPs) coated DNA-SWCNTs that give SERS signals. Dynamic light scattering (DLS), atomic force microscopy (AFM), and high resolution transmission electron microscopy (HRTEM) suggested the products are dispersive and soluble in aqueous solution. The Raman scattering spectra show Ag...

We investigated whether multi-hydroxyl metallofullerenes can penetrate into erythrocyte and whether this potential transmembrane delivery requires aggregated nanostructure of these particles. The metal atom encapsulated in metallofullerenes was used as a quantitative marker to investigate body distribution of aggregated nanoparticles in cytomembran...

The electronic properties of four metallofullerenol samples (La@C82(OH)32, La@C82(OH)24, La@C82(OH)18, La@C82(OH)12) and La@C82 were investigated by synchrotron radiation photoelectron emission spectra (PES). A new emission peak with binding energy of 13.9 eV, which is attributed to La 5d orbitals coupling with nanocage orbitals, is observed in PES...

Antiangiogenesis is an effective strategy for cancer treatment because uncontrolled tumor growth depends on tumor angiogenesis and sufficient blood supply. Great progress has been made in developing a "molecular" form of angiogenesis inhibitors; however, the narrow inhibition spectrum limits anticancer efficacy as those inhibitors that usually targ...

Metallofullerene-containing copolymers (0.12, 0.20, 0.40, and 0.60 wt % Gd@C 82) were first synthesized via radical bulk copolymerization. The structures and the properties of the new polymers, Gd@C 82 -PS, were investigated by GPC, UV-vis spectroscopy, FTIR, 13 C NMR, CV/DPV, and XPS. The polymerization behavior of the metallofullerene and the pro...

This paper presents the growth of negative ions (F−, Cl−, I− and S2−)-doped PbWO4 crystals by the modified Bridgman method and the influence of negative ions doping on the scintillation properties of PbWO4 crystals. Based on the results of measuring the optical transmission, X-ray excited luminescence, light yield and decay time of negative ion-dop...

In this paper, we firstly report a simple but very useful process to extend fullerene chains from monomers via C-bridges: C60 --> C60 -- C -- C60 --> C60 -- C -- C60 -- C -- C60, similar to extending CH4 or CH2 = CH2 to synthesize longer alkyl or alkene chains and these-based materials. The self-assembled formation of C60 -- C -- C60 -- C -- C60 fr...

Lead tungstate, PbWO4 single crystals codoped with Mo6+/F– and Y3+ ions were grown using the modified Bridgman method. Optical transmission, X-ray excited luminescence, photoluminescence, ultrashort pulsed X-ray excited fluorescent lifetime and thermoluminescence have been investigated. Compared to pure PbWO4, the codoped PbWO4:(Mo,Y) and PbWO4:(F,...

Epidemiologic studies have revealed that pollution by ambient particulates is associated with respiratory and cardiovascular diseases, particularly in older people. Toxicologic sensitivity of nanoparticles in different ages was investigated for the first time to demonstrate and explain an age-related difference in response to manufactured nanoparti...

With the rapid development of quantum dot (QD) technology, water-soluble QDs have the prospect of being used as a biological probe for specific diagnoses, but their biological behaviors in vivo are little known. Our recent in vivo studies concentrated on the bio-kinetics of QDs coated by hydroxyl group modified silica networks (the QDs are 21.3+/-2...

The strongly induced circular dichroism (ICD) signals of DNA wrapped around single-walled carbon nanotubes (SWCNTs) are shown by the Synchrotron Radiation Facility. In solution, trace amounts of Hg ions have a strong affinity to bind the nucleic bases of DNA-SWCNTs via a pseudo-first-order kinetic reaction. The Hg binding to the bases of DNA result...

We developed a method to synthesize paramagnetic nanoparticles of Gd@C-82(OH)(22 +/- 2). Such nanoparticles are with ordered microstructures and have strong MRI proton relaxation in vitro/vivo. Compared with commercial Gd-DTPA, a 12 x MRI relaxivity of Gd@C-82(OH)(22 +/- 2) nanoparticles with ordered microstructures was achieved in vitro. The small...

A study has presented the development of a plasmon excitation-assisted wet-chemical method for the preparation of complex inorganic dendrimers with multiple generations of branches. The presence of stacking defects has been found to be dominating the branching points in these complex nanostructures. The synergistic effects of the dipolar force and...

Manufactured fullerene nanoparticles easily enter into cells and hence have been rapidly developed for biomedical uses. However, it is generally unknown which route the nanoparticles undergo when crossing cell membranes and where they localize to the intracellular compartments. Herein we have used both microscopic imaging and biological techniques...

This paper studied the effects of the off-process conditioning parameters on the pad performances. The pad conditioning was evaluated based on the measurement of pad removal rate, the observation of the conditioned pad surface. The performances of conditioned pads were evaluated also by the material removal rate (MRR) and the surface roughness of p...

A study of vacancy-related defects in yttrium-doped PbWO4 with doping concentration of 0–1 mol% has been performed using X-ray diffraction and positron annihilation lifetime spectroscopy. It was found that the samples have vacancy-like defects that act as positron traps. Two main defect lifetime components were found in all samples, one at about 0....

Recently, studies on the biological effects of nanomaterials show signs that some of the manufactured nanoparticles exhibit unexpected toxicity to living organisms. It has previously been reported that the copper particles possess size-depended toxicity. In this paper, we propose that the ultrahigh chemical reactivity of nano-copper results in the...

Quantitative analysis of proteins is an essential part and also constitutes a major challenge in modern proteomics. Quantification of proteins by inductively coupled plasma mass spectrometry (ICPMS) offers an alternative method for quantitative proteomics. In this study, we developed a method of absolute quantification of proteins via sulfur by siz...

The electrochemical properties of the carbon-bridged fullerene dimers C121(I), C121(II), C121(III), C131, and C141 were characterized systematically for the first time in this study. Cyclic voltammogram and differential pulse voltammogram analyses revealed that they first underwent three reversible fullerene-unit-based reduction processes where eac...

The temperature-sensitive property of polyhydroxylated metallofullerene film of Gd@C82(OH)x with special hydroxyl number was studied using synchrotron radiation ultraviolet photoelectron spectroscopy (UPS) and TEM techniques. From room temperature (RT) to 4 degrees C the photoelectron onset energy of the spectra of Gd@C82(OH)12 shifted from 1.9 to...

The photochemical and photophysical properties of the three C121 isomers (I, II, III) were investigated with MADLI-TOF-MS, UV-vis spectra, fluorescence spectra, absorption spectra of their DMA complexes, and theoretical calculations. The three isomers of C121 (I, II, III) have different stabilities under laser irradiation, but isomer I and isomer I...

Nanosized copper particles are widely used in fields of lubricants, polymers/plastic, metallic coating and ink. Recently, we found that copper particles in different sizes can lead to different toxicological effects. To clarify the target organs of copper particles of different sizes, the inductively coupled plasma mass spectroscopy (ICP-MS) was em...

Recently, it was reported that the toxicity of copper particles increases with the decrease of the particle size on a mass basis. To understand this phenomenon, inductively coupled plasma mass spectrometry (ICP-MS) techniques and in vitro chemical studies were carried out to explore how they produce toxicity in vivo. The results suggest that when t...

The water-solubilization of metallofullerenes is important for their potential applications, but their formation processes are still not clear, and the formation yield is uncontrollable. In this paper, we quantitatively studied the water-solubilizing process of Gd@C82 with hydroxylation reaction using ICP-MASS techniques. For the first time, it was...

The electronic properties of the metal atoms encaged in a fullerence cage were investigated using synchrotron X-ray photoelectron spectroscopy. Systematic variations in photoemission of valence band of Gd@C82, Gd@C82(OH)12, and Gd@C82(OH)22 were observed in Gd 5p levels. The results suggest that the electronic properties of the inner metal atom can...

Many applications of fullerene, metallofullerene, and carbon nanotubes request the chemical modifications. But how the modification influences the stability, structural, and electronic properties that directly relate to the practical functions of the carbon nanomaterials, this issue is discussed in this paper. The outer chemical modifications can s...

In this paper, the wear behavior of the ID (inner diameter) saw blade in the cutting process of silicon ingot was observed with SEM. Its wear mechanism was discussed and the relation between the blade wear and vibration, deflection was analyzed. The results show that the blade worn manners include flatted diamond, micro-fractured diamond, macro-fra...

Lithium tantalite (LiTaO3) possesses a combination of unique electro-optical, acoustic, piezoelectric, pyroelectric and non-linear optical properties, making it a suitable material for applications in high frequency, broad width-band SAW and BAW components, filters in television receivers, etc. The surface quality of LiTaO3 wafers decides the perfo...

The effects of Y3+ doping at different concentration on the luminescnece properties of PbWO4 crystals have been investigated by means of Fourier transform infrared (FT-IR) spectrum, optical transmission, thermoluminescence (TL), X-ray excited luminescence (XEL), photoluminescence (PL) under excitation of UV light and light yield measurements. The s...

The interactions between nanoparticles and living cells were investigated by an imaging technique of fluorescence microscopy. For this purpose, the C60 derivative C60(C(COOH)2)2, a therapeutic agent for degeneration diseases of central nervous system, was synthesized, purified and characterized. Its interaction with the living cell and penetration...

To assess the toxicity of copper nanoparticles (23.5 nm) in vivo, LD(50), morphological changes, pathological examinations and blood biochemical indexes of experimental mice are studied comparatively with micro-copper particles (17 microm) and cupric ions (CuCl(2).2H(2)O). The LD(50) for the nano-, micro-copper particles and cupric ions exposed to...

Oxidative stress is considered to be one of the important mechanisms involved in carcinogenesis. In our previous study, gadolinium endohedral metallofullerenol ([Gd@C82(OH)22]n nanoparticles) have shown high inhibitory activity on hepatoma cell (H22) growth in mice. To explore the antioxidative functions of nanoparticles, we investigated the biodis...

In this paper, the scratching processes by a diamond indentor under the loads linearly increased from zero were studied to assess the mechanical behavior of LiTaO3 crystal wafer. Material removal mechanism of LiTaO3 crystal by mechanical loads was analyzed based on the measured acoustic signals in the scratching processes and the observation on the...

The optical properties and radiation hardness of large-size PbWO4:Y crystal grown with modified Bridgman method were investigated through characterization on the optical transmittance, X-ray excited luminescence, light yield and irradiation damage of series 24 × 24 × 24 mm3 block crystals cut from a long as-grown ingot. From the measuring results o...

Gd@C82(OH)40 has been proposed to be as a new generation of the magnetic resonance imaging (MRI) contrast agent, but water-soluble fullerenols Gd@C82(OH)n with n>36 can easily lead to open-caged structures of a high instability. This restricts the practical bio-uses of Gd-metallofullerenols with a large number of hydroxyl groups. To explore how the...

A recently synthesized new molecule C131 (C60CC70) is studied using the MNDO, AM1, PM3 and B3LYP methods. [6.6]-8 isomer is the most stable structure of C131. To create C60CC70, the C70 cage thermodynamically prefers to open bond at the equatorial region. The strain analysis performed for the pristine C70 (D5h) and C70 in C131 revealed that the cyc...

[Gd@C82(OH)22]n particles (22 nm in a saline solution) of a dose level as low as 10(-7) mol/kg exhibit a very high antineoplastic efficiency ( approximately 60%) in mice. A dose increment of 1 x 10(-7) mol/kg increases the tumor inhibition rate 26%. [Gd@C82(OH)22]n particles have a strong capacity to improve immunity and interfere with tumor invasi...

The possibility of modulating the electronic configurations of the innermost atoms inside a nanospace, nano sheath with chemical modification was investigated using synchrotron X-ray photoelectron spectroscopy. Systems of definite nanostructures were chosen for this study. Systematic variations in energy, intensity, and width of pi and sigma O 1s c...

This paper presents the growth of co-doped PbWO4:(Sb,Y) crystal by modified Bridgman method and the influence of Sb and Y co-doping on luminescence and scintillation properties of PbWO4 crystal. Based on the results of measuring the optical transmission, X-ray excited luminescence, photoluminescence, thermoluminescence, light yield and decay time o...

The possible isomers of a newly synthesized C(141) molecule are calculated using MNDO, AM1, PM3, B3LYP/3-21G, and B3LYP/6-31G(d) methods. The geometry optimizations showed that the isomer 8-8 has the lowest total energy in all 64 possible structures of C(141). Unlike those of C(130), C(140), etc., the C(141) 8-8 shows a new structure: two C(70) sid...

Energetic-radiation-induced dimerization reaction of fullerenes was found to be a simple and highly selective method for synthesis of C2m-X-C2n (m = n or m not equal n) type molecules without formation of other products. Utilizing the new method, C70-C-C70, C60-C-C70, C60-C-C60, and C70-O-C70 were prepared and characterized. The method is capable o...

Influences of structural properties on the stability of fullerenols are studied using experimental techniques including laser-induced dissociation associated with a time-of-flight measurement, synchrotron radiation XPS, and FT-IR spectroscopy. Stabilities of a family of fullerenols (C60(OH)42, C60(OH)44, C60(OH)30, C60(OH)30, C60(OH)32, and C60(OH)...

A new [70]fullerene dimer consisting of 141 carbon atoms was first synthesized by a new method with neutron irradiation of [70]fullerene. The results of separation and isolation with two-step HPLC (high performance liquid chromatography) show that this odd-numbered fullerene dimer is stable in air. Laser induced dissociation of C141 mainly yields f...

Light yield of some Y3+: PWO crystals increases after irradiation, and is accompanied with transmission change in the wavelengths from 380 to 500nm. The pre-existing 430nm color centers or annealing induced ones are unstable during irradiation. These results interpret the temperature sensitivity of light yield and radiation hardness. A proper annea...

Although trivalent ions (such as La3+, Lu3+ and Y3+) doping can significantly improve the radiation hardness of lead tungstate crystals, some Y3+ doping PbWO4 (PWO) crystals showed exceptional irradiation behavior, namely, light yield increase after low dose rate irradiation. In addition the radiation hardness was sensitive to annealing temperature...