소비가치에 기반한 공유경제 서비스의 이용의도에 관한 연구

손조기(Sun, ZhaoQi),윤성준(Yoon, SungJoon) 한국상품학회 2020 商品學硏究 Vol.38 No.2

최근 급속한 정보통신기술 발전에 의한 인터넷과 스마트 기기에 의해 소비자들의 생활방식이 바꾸고 있으며, 특히 스마트폰 모바일 서비스가 보편화 되어 소비자들 간의 전자정보 탐색과 전달은 속도가 빨라지고 있다. 본 연구의 주요목적은 인터넷 비즈니스에 기반한 공유경제 서비스의 이용의도를 유발하는 요인들을 탐색적으로 규명하는데 있다. 본 연구는 이러한 연구 필요성에 착안하여 신뢰의 결정요인으로 사회적 소비가치 요인과 윤리적 소비가치요인 두 요인을 중심으로 접근하였다. 2019년 09월 조사를 실시한 결과 총 246개의 유효표본이 채택되었다. 본 연구의 결과는 다음과 같다. 첫째, 사회적 소비가치 요인 및 윤리적 소비가치 요인은 공유경제 서비스에 대한 신뢰 요인에 모두 유의한 영향을 미쳤다. 둘째, 신뢰 요인은 공유경제 서비스에 대한 이용의도에 유의한 영향을 미쳤다. 마지막으로 소비자의 지각된 위험에 따라 예측변수들이 이용의도에 미치는 영향이 달라지는 지를 검증한 결과, 지각된 위험은 신뢰와 이용의도간의 관계에서 유의한 조절효과를 보였다. 본 연구의 결과는 향후 공유경제 서비스를 연구하고 활용하는데 유용한 자료를 제공할 것으로 기대한다. Recently, consumers lifestyle are undergoing rapid changes due to the advances in information and communications technologies, in particular, the searching and proloferation of electronic information among consumers are accelerating as smartphone mobile services are used widely. The major objective of the present study is to find out about the factors affecting customers’ intention to use sharing economy services. In view of such research objective, we adopted social consumption value and ethical consumption value as determinants of consumers’ trust towards sharing economy services, which was conceived to influence inatention to use the services. The survey was conducted in September 2019 and data from 246 respondents were analyzed. The study result is as follows. First, social consumption value and ethical consumption value all had significant effects on trust with regard to sharing economy services. Second, trust value had a significant impact on intention with regards to sharing economy services. Finally, the study examined whether perceived risk moderates the relationship between the predictors and use intention. The result showed that the perceived risk moderates the relationship between trust and use intention. The results of this study are expected to provide useful information for future research on sharing economy services.

Hydroxide MgSn(OH)6: A Promising New Photocatalyst for Methyl Orange Degradation

Jiajia Tao,Zhaoqi Sun,Miao Zhang,Gang He,Xiaoshuang Chen 대한금속·재료학회 2017 ELECTRONIC MATERIALS LETTERS Vol.13 No.4

Highly crystalline hydroxide MgSn(OH)6 (MHS) polyhedral particleswere synthesized by changing reaction time (10, 15 and 20 h) in ahydrothermal process. The structural and morphological poperties ofobtained samples were characterized by X-ray diffraction (XRD),scanning electron microscopy (SEM), and UV-vis diffuse reflectancespectroscopy (DRS). The photocatalytic activity of the MHS wasfurther evaluated by the degradation of methyl orange (MO) underultraviolet (UV) light illumination. Compared with commercial TiO2(Degussa P25), the MHS prepared for 15 h showed similar degradationefficiency of methyl orange (MO), mainly due to its higher specificsurface area (55 m2g−1) and better optical properties.

Preparation of biomass-based yam solar absorber for enhanced solar evaporation application

Ting Li,Juan Jia,Yanqing Wang,Hanxue Sun,Jiyan Li,Zhaoqi Zhu,Weidong Liang 한국화학공학회 2023 Korean Journal of Chemical Engineering Vol.40 No.11

The solar evaporation system has become a research hotspot in the field of photothermal conversion technology in recent years because of its high photothermal conversion efficiency and practicality of promotion. Biomass solar absorbers have excellent solar absorption properties and high solar-water vapor conversion, but they have the limitations of long feedstock production cycle and high carbonization temperature. As a kind of biomass materials, yam is not only inexpensive, but also has a short production cycle and rich pore structures. Therefore, in this paper, a yam based solar absorber with rich pore structure was prepared, and the photothermal conversion efficiency of the absorber was further investigated. The yam was treated with freeze-dried method and carbonized at different temperatures to obtain yam solar absorbers. Then the thermal stability and porosity of solar absorber was found to gradually rise as the treatment temperature increased. The solar absorption rate of the carbonized yam was close to 90% in the near UV-visible region. Solar-water vapor control experiments with different treatments of the solar absorber of the yam were carried out in simulated solar-driven interface steam generation system (SISGS). An absorber treated at 200 °C in the sun was found to have the best performance with a solar-water vapor conversion of about 90% and a water evaporation rate of 1.3164 kg m−2 h−1.

Single-cell transcriptomic analysis reveals transcriptional and cell subpopulation differences between human and pig immune cells

Li Jie,Xu Yanan,Zhang Jiayu,Zhang Zhaoqi,Guo Han,Wei Dong,Wu Changhong,Hai Tang,Sun Hai-Xi,Zhao Yong 한국유전학회 2024 Genes & Genomics Vol.46 No.3

Background The pig is a promising donor candidate for xenotransplantation. Understanding the differences between human and swine immune systems is critical for addressing xenotransplant rejection and hematopoietic reconstitution. The gene transcriptional profile differences between human and pig immune cell subpopulations have not been studied. To assess the similarities and differences between pigs and humans at the levels of gene transcriptional profiles or cell subpopulations are important for better understanding the cross-species similarity of humans and pigs, and it would help establish the fundamental principles necessary to genetically engineer donor pigs and improve xenotransplantation. Objective To assess the gene transcriptional similarities and differences between pigs and humans. Methods Two pigs and two healthy humans’ PBMCs were sorted for 10 × genomics single-cell sequence. We generated integrated human-pig scRNA-seq data from human and pig PBMCs and defined the overall gene expression landscape of pig peripheral blood immune cell subpopulations by updating the set of human-porcine homologous genes. The subsets of immune cells were detected by flow cytometry. Results There were significantly less T cells, NK cells and monocytes but more B cells in pig peripheral blood than those in human peripheral blood. High oxidative phosphorylation, HIF-1, glycolysis, and lysosome-related gene expressions in pig CD14+ monocytes were observed, whereas pig CD14+ monocytes exhibited lower levels of cytokine receptors and JAK-STAT-related genes. Pig activated CD4+T cells decreased cell adhesion and inflammation, while enriched for migration and activation processes. Porcine GNLY+CD8+T cells reduced cytotoxicity and increased proliferation compared with human GNLY+CD8+T cells. Pig CD2+CD8+γδT cells were functionally homologous to human CD2+CD4+ γδT cells. Pig CD2−CD8−γδT cells expressed genes with quiescent and precursor characteristics, while CD2−CD8+γδT cells expressed migration and memory-related molecules. Pig CD24+ and CD5+B cells are associated with inflammatory responses. Conclusion Our research with integrated scRNA-seq assays identified the different distribution of pig immune cell subpopulations and the different transcriptional profiles of human and pig immune cells. This study enables a deeper understanding of the development and function of porcine immune cells. Background The pig is a promising donor candidate for xenotransplantation. Understanding the differences between human and swine immune systems is critical for addressing xenotransplant rejection and hematopoietic reconstitution. The gene transcriptional profile differences between human and pig immune cell subpopulations have not been studied. To assess the similarities and differences between pigs and humans at the levels of gene transcriptional profiles or cell subpopulations are important for better understanding the cross-species similarity of humans and pigs, and it would help establish the fundamental principles necessary to genetically engineer donor pigs and improve xenotransplantation. Objective To assess the gene transcriptional similarities and differences between pigs and humans. Methods Two pigs and two healthy humans’ PBMCs were sorted for 10 × genomics single-cell sequence. We generated integrated human-pig scRNA-seq data from human and pig PBMCs and defined the overall gene expression landscape of pig peripheral blood immune cell subpopulations by updating the set of human-porcine homologous genes. The subsets of immune cells were detected by flow cytometry. Results There were significantly less T cells, NK cells and monocytes but more B cells in pig peripheral blood than those in human peripheral blood. High oxidative phosphorylation, HIF-1, glycolysis, and lysosome-related gene expressions in pig CD14+ monocytes were observed, whereas pig CD14+ monocytes exhibited lower levels of cytokine receptors and JAK-STAT-related genes. Pig activated CD4+T cells decreased cell adhesion and inflammation, while enriched for migration and activation processes. Porcine GNLY+CD8+T cells reduced cytotoxicity and increased proliferation compared with human GNLY+CD8+T cells. Pig CD2+CD8+γδT cells were functionally homologous to human CD2+CD4+ γδT cells. Pig CD2−CD8−γδT cells expressed genes with quiescent and precursor characteristics, while CD2−CD8+γδT cells expressed migration and memory-related molecules. Pig CD24+ and CD5+B cells are associated with inflammatory responses. Conclusion Our research with integrated scRNA-seq assays identified the different distribution of pig immune cell subpopulations and the different transcriptional profiles of human and pig immune cells. This study enables a deeper understanding of the development and function of porcine immune cells.

Low-temperature strategy for vapor phase hydrothermal synthesis of C\N\S-doped TiO2 nanorod arrays with enhanced photoelectrochemical and photocatalytic activity

Hai Yu,Miao Zhang,Yanfen Wang,Janguo Lv,Yanmei Liu,Gang He,Zhaoqi Sun 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.98 No.-

In this study, a material with high photocatalytic activity was synthesized using ternary C/N/S-dopedTiO2 nanorod array (TiO2); this was done using a practical and straightforward vapor-phase hydrothermal(VPH) method at a low temperature. The effect of C/N/S content on TiO2 morphology, optical,photocatalytic and photoelectrochemical (PCE) properties of the material was investigated by varying thequality of thiourea. C/N/S-TiO2 reduced the bonding rate of electron-hole pairs and enhances visible lightabsorption, photocatalytic, and PCE properties. The C/N/S doping could significantly adjust theabsorption cut-off wavelengths (407 602 nm) and shorten the bandgap (3.04 2.18 eV) of TiO2. Undersimulated sunlight, 8-C/N/S-TiO2 had the highest photocatalytic efficiency of 97.6% for methylene blue(MB) in 150 min with a rate constant of 0.0192 min 1, which is approximately four times that of TiO2(0.005 min 1). The 8-C/N/S-TiO2 photoelectrode had the lowest transfer resistance for interfacial chargesand highest transient photocurrent of 33.5 mA/cm2, which isfive times higher than that of TiO2 (6.6 mA/cm2). The 8-C/N/S-TiO2 exhibits the most extensive PCE behavior as a photoelectrode, and has a currentdensity of 38.2 mA/cm2 at 2.5VRHE, which is about two times higher than TiO2 (19.1 mA/cm2). Thefavorable sunlight-driven photocatalytic activity is probably due to the synergistic effect of C/N/S-doping,which shifts the valence band maximum of TiO2 upward. This provides new ideas for future solar cellsthat can use dye-sensitized TiO2 nanorod arrays as photoanodes. It is noteworthy that VPH is a veryeffective strategy for fabricating semiconductors doped with multiple nonmetallic elements.

Facile Synthesis of Zn1-xCuxO Nanorods with a Very Broad Visible Band

Jianguo Lv,Changlong Liu,Wanbing Gong,Zhenfa Zi,Xiaoshuang Chen,Kai Huang,Feng Liu,Tao Wang,Gang He,Xueping Song,Zhaoqi Sun 대한금속·재료학회 2012 ELECTRONIC MATERIALS LETTERS Vol.8 No.5

Zn1-xCuxO nanorods with different Cu concentrations are prepared by a hydrothermal method. Bent and aggregated nanorods are obtained, which is attributed to centripetal surface tension of the evaporation and coagulation processes of the water film on the ZnO nanorods. The broad visible band consists of one violet, three blue,and one green emission. The violet emission is due to the transition of electrons from zinc interstitial (Zni)levels to the valance band. The three blue emissions may be attributed to the transition from extended Zni levels, which are slightly below the simple Zni level, to the valance band. The change of the green emission may be the result of competition between oxygen vacancies (VO) and zinc vacancies (VZn).

Influence of Solution Concentrations on Surface Morphology and Wettability of ZnO Thin Films

Jianguo Lv,Changlong Liu,Feng Wang,Zhitao Zhou,Zhenfa Zi,Yuan Feng,Xiaoshuang Chen,Feng Liu,Gang He,Shiwei Shi,Xueping Song,Zhaoqi Sun 대한금속·재료학회 2013 ELECTRONIC MATERIALS LETTERS Vol.9 No.2

ZnO thin films were grown on silicon substrates using a hydrothermal method. The XRD patterns show that all of the peaks can be attributed to the wurtzite structures of ZnO. The TC value of (002) plane and average crystal size increase first and then decrease with the increase of solution concentration. SEM and AFM results show that many dense hexagonal cylinder particles have been observed on the surface of the thin films, which grown at 0.08 and 0.10 mol/L. The surface roughness of the thin films deposited at 0.06,0.08, 0.10, and 0.12 mol/L are 24.5, 38.3, 32.0, and 39.4 nm, respectively. Surface wettability results show that the preferential orientation along c-axis and surface roughness contribute significantly to the hydrophobicity. The reversible switching between hydrophobicity and hydrophilicity is related to the synergy of the transition of wetting model, surface crystal structure, and surface roughness.