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504 results on '"Hu, Zhiwen"'

108. Paleoproteomics Reveals the Species Sources of Ancient Hair Textiles and Supports Historicity of Wool Manufacture in the Bronze Age Along the Silk Road

Author

Wang Bing, Zhou Lian, Shanshan Song, Hailing Zheng, Hu Zhiwen, Hailiang Yang, Wang Zhongyuan, Yang Hui, Peng Zhiqin, Zhai Yujie, and Yang Zhou

Subjects
SILK, Bronze Age, Wool, Historicity, media_common.quotation_subject, Art, Ancient history, media_common
Abstract

The Xinjiang region is a crossroad between the West and East on the Silk Road, where many exquisite hair textile relics in the Bronze Age were unearthed, therefore, it attracts the attention of scholars around the world. However, the limitation of information acquisition ability is still the main bottleneck to recognize the scientific value of ancient hair textile relics. In this study, paleoproteomics method was proposed to analyse the hair textile relics from Xiaohe and Shanpula cemetery in the Xinjiang region. To establish the databases of biomarkers and morphological features, five modern hair samples from representative animals (grey fox, raccoon dog, American mink, cape hare, and lamb) were selected and examined. Through searching the databases, the ancient hair textile samples from Xiaohe and Shanpula cemetery were all identified as wool. Ultimately, this work demonstrated the evidences supporting the existence of prosperous sheep husbandry, wool manufacture and cultural exchange along the Silk Road in the Bronze Age. The paleoproteomics, in combination with other methods, obtained more reliable and profound information from hair textile relics than ever before, and it goes without saying that they have bright prospects of being widely used in hair textile archaeology.

Published
2021

135. Preparation of the MoS2/TiO2/HMFs ternary composite hollow microfibres with enhanced photocatalytic performance under visible light

Author

Yang Ziang, Yu Yanjia, Hu Zhiwen, and Wan Junmin

Subjects
Thermogravimetric analysis, Materials science, Nanotechnology, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Biomaterials, chemistry.chemical_compound, Colloid and Surface Chemistry, Adsorption, chemistry, X-ray photoelectron spectroscopy, Chemical engineering, Specific surface area, Rhodamine B, Photocatalysis, Fourier transform infrared spectroscopy, 0210 nano-technology, Visible spectrum
Abstract

A novel route for synthesis of MoS2/TiO2/hollow microfibers (HMFs) ternary composite photocatalyst using sol-gel method combined with high temperature calcination under a nitrogen circumstances was reported for the first time. The morphology, structure and optical properties of the novel MoS2/TiO2/HMFs photocatalysts were fully characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), specific surface area (BET) and thermogravimetric analysis (TG). The photocatalytic activities were evaluated by photodegradating Methylene blue (MB) and Rhodamine B (RB) under visible light irradiation. The results showed the MoS2/TiO2/HMFs ternary composite hollow microfibre photocatalysts had a purification of more than 98.7% for MB and RB of simulating wastewater, and acquired the superior synergistic effect of adsorption and catalysis for organic pollutants. That's because the sensitization of MoS2 enlarged the wavelength response range to the visible region of the solar spectrum, the HMFs could beneficially increase adsorption capability for organic pollutants, and the mixed crystalline phase of TiO2 accelerated the decomposition of organic pollutant. A detailed study of involved active species unraveled the mechanism regarding photocatalysis. So, the synergistic photocatalytic effect of HMFs, TiO2 and MoS2 was very important and significant for wastewater treatment or prevention of air pollution.

Published
2017

136. Preparation and Photocatalytic Activity of TiO2-Wrapped Cotton Nanofiber Composite Catalysts

Author

Liruhua Zhang, Hu Zhiwen, Jiang Wenbin, and Wan Junmin

Subjects
inorganic chemicals, Environmental Engineering, Materials science, Composite number, Bioengineering, 02 engineering and technology, 010501 environmental sciences, 021001 nanoscience & nanotechnology, 01 natural sciences, law.invention, Catalysis, Cellulose fiber, Chemical engineering, law, Nanofiber, Specific surface area, Photocatalysis, medicine, Calcination, Composite material, 0210 nano-technology, Waste Management and Disposal, 0105 earth and related environmental sciences, Activated carbon, medicine.drug
Abstract

A novel TiO2-wrapped nanofiber composite catalyst, which possessed a unique porous structure and mixed crystalline phase, was prepared by the combination of superficial sol–gel and post-calcination processes. By means of the superficial sol–gel process, TiO2 layers were deposited on the surface of each nanofiber-like cellulose fiber, and then the TiO2-wrapped nanofiber composite catalysts were calcined at different temperatures under a nitrogen atmosphere. With temperature increasing, the original cotton nanofiber composites were converted into porous carbon nanofiber catalysts wrapped by a TiO2 mixed crystalline phase, which was accompanied by a crystal transformation. The photocatalytic activity of the new catalysts was evaluated by the degradation of methylene blue (MB) under ultraviolet (UV) irradiation. The results demonstrated that the new catalysts had good photocatalytic ability, and the TNC-700 catalyst showed a superior photocatalytic ability compared with the other catalysts; the new catalysts had a unique porous structure, high specific surface area, and mixed crystalline phase. Additionally, the synergistic photocatalytic effect of the TiO2 and activated carbon nanofiber resulted in the efficient degradation of organic pollutants in water or air.

Published
2017

138. Development of Immunochromatographic Strip Assays Based on a Tailored Monoclonal Antibody for the on-Site Characterization of Ancient Silk.

Author

Li, Qingqing, Zhu, Chengyu, Deng, Bozhi, Ma, Weiwei, Zheng, Hailing, Zhou, Yang, Peng, Zhiqin, Hu, Zhiwen, and Wang, Bing

Subjects
COLLOIDAL gold, PAPER chromatography, SILK fibroin, SILK, MONOCLONAL antibodies, COLLOIDS
Abstract

The characterization of ancient silk provides significant historical information and contribute to the identification of the origin of the material. At present, there are many ways to characterize silk. However, on-site identification of ancient silk remains a crucial challenge. In this study, a paper chromatography system consisting of a colloidal gold immunochromatographic strip (GICS) and a time-resolved fluorescence immunochromatographic strip (TICS) is proposed to meet this challenge. On the basis of the original paper chromatography technique, a monoclonal antibody against silk fibroin (SF) was prepared and applied in this new paper chromatography system. Both the GICS and the TICS showed good sensitivity, specificity and reliability, with the limit of detection for silk fibroin being 30 μg/mL and 49.20 ng/mL, respectively. Moreover, there was no cross reaction with possible interferents. Furthermore, the GICS had acceptable thermal stability. The recovery of the TICS assay was in the range from 98.12% to 103%, and the variation coefficient was from 5.34% to 6.93%. This work significantly improves access to scientific information at archaeological sites, providing new scientific evidence for exploring the origin and transmission roadmap of ancient silk. [ABSTRACT FROM AUTHOR]

Published
2021
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