ORCID Profile
0000-0002-8933-1505
Current Organisation
Sun Yat-Sen University
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Publisher: Elsevier BV
Date: 05-2019
Publisher: Informa UK Limited
Date: 17-06-2018
DOI: 10.1080/09540121.2018.1487916
Abstract: HIV self-stigma in HIV positive men who have sex with men (HIVMSM) has been identified as one of the largest challenges of HIV prevention, and associates with numerous negative outcomes, including depression, decreased social support, and less condom use intentions. In the present study, 321 HIVMSM in Chengdu, China were recruited to examine the prevalence of condom use in the past months and intentions to use condoms in next six months we also identify pathways between HIV self-stigma and intentions to use condoms by the structural equation modeling approach. Results showed that Chinese HIVMSM had the suboptimal prevalence of consistent condom use and low intentions to use condoms consistently. Additionally, depression and decreased social support were significant mediators between HIV self-stigma and condom use intentions. The complex pathways between HIV self-stigma and intentions to use condoms should be taken into account in the HIV prevention and intervention programs.
Publisher: Springer Science and Business Media LLC
Date: 09-06-2015
Publisher: American Chemical Society (ACS)
Date: 02-06-2021
Publisher: Elsevier BV
Date: 08-2017
DOI: 10.1016/J.JMGM.2017.04.011
Abstract: The C
Publisher: Springer Science and Business Media LLC
Date: 23-05-2021
Publisher: Wiley
Date: 03-02-2010
DOI: 10.1002/POC.1657
Publisher: American Chemical Society (ACS)
Date: 11-07-2018
DOI: 10.1021/ACS.JPCLETT.8B02043
Abstract: Despite many efforts focused on the emission origin of carbon dots (CDs), it is still a topic of debate. This is mainly due to the complex structure of these nanomaterials. Here, we developed an innovative method to evaluate the number and spectral characterizations of various emission centers in CDs. We monitored the photostability of a series of column-separated CDs under UV irradiation to obtain three-dimensional data sets and resolve them using multivariate decomposition methods. The obtained results clearly revealed the presence of three different types of emission centers in CDs, including molecular states, aromatic domain states, and carbon-core states so that their single or coexisting appearance was found to be deeply dependent on the reaction temperature. Furthermore, density functional theory and time-dependent density functional theory were used to investigate the electronic and optical properties of some different aza-polycyclic and corannulene molecules as possible polycyclic aromatic hydrocarbons responsible for the above-mentioned aromatic domain states.
Publisher: Elsevier BV
Date: 2018
Publisher: Elsevier BV
Date: 06-2018
Publisher: CSIRO Publishing
Date: 2014
DOI: 10.1071/CH13557
Abstract: Cyclic N,N-dialkoxyamides have been made, for the first time, by hypervalent iodine oxidation of β- and γ-hydroxyhydroxamic esters 17, 19, and 21. The fused γ-lactam products, N-butoxy- and N-benzyloxybenzisoxazolones (22a and 22b), are stable while alicyclic γ-lactam and δ-lactam products, 24 and 25, although observable by NMR spectroscopy and ESI-MS are unstable at room temperature, undergoing HERON reactions. The γ-lactam 24 undergoes exclusive ring opening to give a butyl ester-functionalised alkoxynitrene 28. The δ-lactam 25, instead, undergoes a HERON ring contraction to give butyrolactone (27). The structures of model γ- and δ-lactams 6, 7, and 8 have been determined at the B3LYP/6-31G(d) level of theory and the γ-lactams are much more twisted than the acyclic N,N-dimethoxyacetamide (5) resulting in a computed amidicity for 6 of only 25 % that of N,N-dimethylacetamide (3). The HERON reactions of N,N-dimethoxyacetamide (5) and alicyclic models 6 and 8 have been modelled computationally. The facile ring opening of 6 (EA = 113 kJ mol–1) and ring contraction of 8 (EA = 145 kJ mol–1) are predicted well, when compared with the HERON rearrangement of 5 (EA = 178 kJ mol–1).
Publisher: American Chemical Society (ACS)
Date: 04-05-2020
Publisher: Springer Science and Business Media LLC
Date: 10-06-2022
Publisher: Springer Science and Business Media LLC
Date: 22-02-2021
Publisher: Elsevier BV
Date: 08-2018
Publisher: Elsevier BV
Date: 11-2017
Publisher: BMJ
Date: 03-2020
DOI: 10.1136/BMJOPEN-2019-036098
Abstract: Internet search engine data have been widely used to monitor and predict infectious diseases. Existing studies have found correlations between search data and HIV/AIDS epidemics. We aimed to extend the literature through exploring the feasibility of using search data to monitor and predict the number of newly diagnosed cases of HIV/AIDS, syphilis and gonorrhoea in China. This paper used vector autoregressive model to combine the number of newly diagnosed cases with Baidu search index to predict monthly newly diagnosed cases of HIV/AIDS, syphilis and gonorrhoea in China. The procedures included: (1) keywords selection and filtering (2) construction of composite search index (3) modelling with training data from January 2011 to October 2016 and calculating the prediction performance with validation data from November 2016 to October 2017. The analysis showed that there was a close correlation between the monthly number of newly diagnosed cases and the composite search index (the Spearman’s rank correlation coefficients were 0.777 for HIV/AIDS, 0.590 for syphilis and 0.633 for gonorrhoea, p .05 for all). The R 2 were all more than 85% and the mean absolute percentage errors were less than 11%, showing the good fitting effect and prediction performance of vector autoregressive model in this field. Our study indicated the potential feasibility of using Baidu search data to monitor and predict the number of newly diagnosed cases of HIV/AIDS, syphilis and gonorrhoea in China.
Publisher: Elsevier BV
Date: 10-2022
Publisher: Springer Science and Business Media LLC
Date: 08-08-2021
Location: Iran (Islamic Republic of)
Location: Iran (Islamic Republic of)
Location: Iran (Islamic Republic of)
No related grants have been discovered for Avat Arman Taherpour.