Wang H.,Sichuan University |
Wang H.,Panzhihua College |
Feng K.,Sichuan University |
Zhou Y.,Sichuan University |
And 2 more authors.
Materials Letters | Year: 2014
Foam glass was produced by the sintered powder technology using waste glass and titania-bearing blast furnace slag with Na2B4O 7·5H2O as the flux agent at the temperature of 900 °C. CaCO3 and Na3PO4·12H 2O were added as foaming agent and foaming stabilizer, respectively. The influence of the amount of Na2B4O7· 5H2O on the apparent density, water absorption, compressive strength, microstructure and crystalline phase of the foam glass was evaluated. The experimental results showed that flux agent content has a significant impact on the properties of the expanded material. The foam glass with 10 wt% Na 2B4O7·5H2O exhibited the excellent comprehensive properties at a low sintering temperature of 900°C. © 2014 Elsevier B.V.
Ma G.,Panzhihua College |
Zou M.,Panzhihua College |
Zhang Y.,Sichuan University |
Huo H.,Panzhihua College
Xiyou Jinshu/Chinese Journal of Rare Metals | Year: 2010
Ti-bearing blast-furnace slag contained 20%~23% of titania approximately was a valuable secondary resource. Ti-enriched slag was prepared through hydrolysis-acidification of the Ti-bearing blast-furnace slag based on the reactive differences of titania and other elements to acid. Moreover, the effects of the particle size, molar ratio of acid to Ti-bearing slag, reaction temperature and time on the concentration of Ti-enriched slag was researched in detail, and an optimal condition for hydrolysis-acidification obtained. The XRD patterns indicated that Al, Mg and Fe were acid-hydrolyzed entirely and concentration of titania in the Ti-enriched slag exceeded 48%. This technique would provide a new valuable approach to the comprehensive utilization of Ti-bearing blast-furnace slag.
Zou M.,Panzhihua College |
Wang Y.,Sichuan University |
Chen Y.,Sichuan University |
Zhang Y.,Sichuan University
Advanced Materials Research | Year: 2010
In this paper, the TiO2-based varistor ceramics added different donor additives were prepared and their propreties had been compared. The effects of added methods and added amounts of V2O5 (Nb2O5, or Ta2O5) on the microstructure, dielectric and varistor properties of TiO2 double functional ceramics were investigated. The ceramic phase and the microstructure of the disks were analyzed by X-ray diffraction (XRD) and scanning electron microscope (SEM). The frequency dependences of the samples capacitance (C), the dielectric loss (tanδ) were determined on LCR meter, and the varistor voltage V1mA was measured by using FC-2G meter. It is found that the proper amount of V2O5, Nb2O5 or Ta 2O5 additves can promote the growth of the crystal and the formation of the grain boundary layer at a different extent. Meanwhile, the proper addition amount can increases the nonlinear exponent and the dielectric constant, but decreases the breakdown voltage. It can also improve the sintering properties of the samples. © (2010) Trans Tech Publications.
Li Y.-F.,Sichuan University |
Zhu S.-F.,Sichuan University |
Zhu X.-J.,Panzhihua College
Advanced Materials Research | Year: 2012
To obtain a good Cherry preservative, the author prepared acetic acid Chitosan and metal ion complexes with solid-liquid reaction. Besides, the Cherry preservative was prepared by modified Chitosan materials. It was obtained that the optimal concentration of chitosen acetate for fresh cherries is 20g/l by studying effect of different concentrations of preservative on the storage of Cherry and its preservation time was 24 days. It also found that it owned better preservation effect with adding metal ion and Zn compound preservative had the best preservation performance among all experimental ion compound preservation. The experiment results showed that the preservative which prepared by Chitosan had excellence properties of extending Cherries storage periods, lowing the loss of Cherry fruit during storage, slowing the forming of Cherry soluble solids and the decreasing of titratable acid and vitamine C, but also reducing Cherry metabolism. © (2012) Trans Tech Publications.
PubMed | Panzhihua College, Jilin University, University of Pennsylvania, CAS Kunming Institute of Zoology and Peking Union Medical College
Type: Comparative Study | Journal: Journal of virology | Year: 2015
Studies of herpes simplex virus (HSV) infections of humans are limited by the use of rodent models such as mice, rabbits, and guinea pigs. Tree shrews (Tupaia belangeri chinensis) are small mammals indigenous to southwest Asia. At behavioral, anatomical, genomic, and evolutionary levels, tree shrews are much closer to primates than rodents are, and tree shrews are susceptible to HSV infection. Thus, we have studied herpes simplex virus 1 (HSV-1) infection in the tree shrew trigeminal ganglion (TG) following ocular inoculation. In situ hybridization, PCR, and quantitative reverse transcription-PCR (qRT-PCR) analyses confirm that HSV-1 latently infects neurons of the TG. When explant cocultivation of trigeminal ganglia was performed, the virus was recovered after 5 days of cocultivation with high efficiency. Swabbing the corneas of latently infected tree shrews revealed that tree shrews shed virus spontaneously at low frequencies. However, tree shrews differ significantly from mice in the expression of key HSV-1 genes, including ICP0, ICP4, and latency-associated transcript (LAT). In acutely infected tree shrew TGs, no level of ICP4 was observed, suggesting the absence of infection or a very weak, acute infection compared to that of the mouse. Immunofluorescence staining with ICP4 monoclonal antibody, and immunohistochemistry detection by HSV-1 polyclonal antibodies, showed a lack of viral proteins in tree shrew TGs during both acute and latent phases of infection. Cultivation of supernatant from homogenized, acutely infected TGs with RS1 cells also exhibited an absence of infectious HSV-1 from tree shrew TGs. We conclude that the tree shrew has an undetectable, or a much weaker, acute infection in the TGs. Interestingly, compared to mice, tree shrew TGs express high levels of ICP0 transcript in addition to LAT during latency. However, the ICP0 transcript remained nuclear, and no ICP0 protein could be seen during the course of mouse and tree shrew TG infections. Taken together, these observations suggest that the tree shrew TG infection differs significantly from the existing rodent models.Herpes simplex viruses (HSVs) establish lifelong infection in more than 80% of the human population, and their reactivation leads to oral and genital herpes. Currently, rodent models are the preferred models for latency studies. Rodents are distant from primates and may not fully represent human latency. The tree shrew is a small mammal, a prosimian primate, indigenous to southwest Asia. In an attempt to further develop the tree shrew as a useful model to study herpesvirus infection, we studied the establishment of latency and reactivation of HSV-1 in tree shrews following ocular inoculation. We found that the latent virus, which resides in the sensory neurons of the trigeminal ganglion, could be stress reactivated to produce infectious virus, following explant cocultivation and that spontaneous reactivation could be detected by cell culture of tears. Interestingly, the tree shrew model is quite different from the mouse model of HSV infection, in that the virus exhibited only a mild acute infection following inoculation with no detectable infectious virus from the sensory neurons. The mild infection may be more similar to human infection in that the sensory neurons continue to function after herpes reactivation and the affected skin tissue does not lose sensation. Our findings suggest that the tree shrew is a viable model to study HSV latency.
Qin Z.,Chengdu University of Technology |
Qin Z.,Panzhihua College |
Yang W.,Chengdu University of Technology |
Pan P.,Chengdu University of Technology
Guangdian Gongcheng/Opto-Electronic Engineering | Year: 2013
Denoising the high resolution remote sensing images is a difficult problem in the relative research field of remote sensing. A novel algorithm for denoising the high resolution remote sensing images is proposed based on sparse representation. A dictionary which has an efficient description of remote sensing image content is obtained based on K-SVD algorithm according to the characteristics of the added noise of high spatial resolution remote sensing images. Denoising is realized by using sparse representation, and the useful information of the image is kept. The experimental results of the remote sensing images obtained by "the first satellite of high resolution" show that the algorithm can filter out the noise in the image more effectively and improve the PSNR, and this method has better performance than other dictionary learning algorithms and other denoising algorithms.
Wang H.-B.,Panzhihua College |
Shi S.-K.,Laiwu Steel Group |
Sun Q.-Z.,Panzhihua College
Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment | Year: 2014
The effect of long-term aging at 500°C on microstructure and toughness of 2205 stainless steel was studied by means of scanning electron microscopey SEM, transmission electron microscopy (TEM) and impact testing machine. The results show that the microstructure of the stainless steel after solution annealing treatment is consisted of only two phases. When the alloy is aged for approximately 2 months at 500°C, Cr-rich α′-phase and Fe-rich α-phase are formed by spinodal decomposition. When the alloy is aged at 500°C for 5 months, the needle-shape precipitates of R begin to precipitate along the grain boundaries, and the amount of precipitates (R-phase) has a peak. Extending the aging time to 8 months makes the precipitate of R-phase grown and coarsen. Besides, the impact energy and toughness of 2205 stainless steel dramatically decrease with the increase of the aging time. According to the further analysis, the main reason is directly related to the spinodal decomposition of ferrite phase and the generation of precipitation R phase.
Han H.B.,Pan Zhi Hua College |
Han H.B.,Sichuan Province Key Laboratory of Characteristic Biological Resources of Dry and Hot Valley |
Dong Q.,Pan Zhi Hua College |
Diao Y.,Pan Zhi Hua College |
And 4 more authors.
Advanced Materials Research | Year: 2014
In this paper, the contents of these elements including Cu, Fe, Mn, Zn, Al, Cd, Pb, Ti and As were determined by ICP-AES technique, which elements originated from maca from different places. Detection limits ranged 0.0022 ug/ml-1 and 0.077ug/ml-1, the relative standard deviations for all these elements were lower than 2%, and recovery rates ranged 95.56% and 106.2%. The results showed that there were rich metal elements in maca from different places; contents of Fe and Al were highest; contents of Mn, Zn, Cu and Ti were moderately high, and contents of As, Cd and Pb were lowest. Futhermore, Cu, Fe, Mn, Zn were essential to people's health, and Al, Cd, As, Pb and Ti had potentially physiologically toxic. Finally, concentrations of elements within maca from different places were different, which may have some relations with the environment where maca grew. As a result, the determining method which elements of maca. are determined by ICP-AES is rapid, accurate and convenient, and wild maca may contain toxic elements because of pollutional soil and environment, so maca cultivated artificially can effectively reduce harmful elements. © (2014) Trans Tech Publications, Switzerland.
Qin Z.,Chengdu University of Technology |
Qin Z.,Panzhihua College |
Yang W.,Chengdu University of Technology
Journal of Computational Information Systems | Year: 2013
Determining the optimal number of clusters in a dataset is a difficult problem in the relative research field of cluster. To attack this problem effectively, this article proposes the valid index function based on the geometry structure of data set, and unites K-means clustering algorithm together. A method for getting the optimal cluster number in a massive dataset is proposed based on K-means algorithm and cluster quality validity index Q(c). Theoretical analysis and experimental results have verified the effectiveness and good performance of the algorithm. © 2013 Binary Information Press.
Feng C.-Y.,Panzhihua College
International Journal of Ophthalmology | Year: 2010
• AIM: To explore the clinical application of fourier-domain optical coherence tomography (FD OCT) in central serous choroiretinopathy (CSC). • METHODS: Fourty patients 40 eyes diagnosed with CSC by fluorescein fundus angiography (FFA) underwent FD OCT to observe the changes of macula, then they were treated with 532 laser, and FD OCT was traced. • RESULTS: Neurosensory retina or combined with retinal pigment epithelium (RPE) detachment and RPE fracture were observed. The recovery of visual acuity post-laser therapy was consistent with the loss of macular volume. • CONCLUSION: FD OCT could replenish and improve FFA in CSC diagnosis and display a clinical significance for estimated prognosis in CSC post-laser therapy.