Present Situation and Problems of the Application of New Media in Rural E-commerce:A Case Study of Anhui Province

The application of new media technology in rural areas of China provides more convenient conditions for agricultural products publicity, transaction information dissemination and user feedback. In particular, e-commerce platform based on Internet technology provides more convenient sales channels for characteristic agricultural products. Through the research on the application of new media technology in rural areas of Anhui Province, this paper explores the actual effect of new media technology on the development of rural e-commerce. The questionnaire survey is used to understand the development status of new media in rural areas of China. They are: the development of "Internet government affairs" has begun to take shape; The official account of WeChat has shortened the time and space between the production and consumption of agricultural products. Live interaction gives full play to the powerful role of fan economy; Digital media has not been widely used. Through the form of on-the-spot visits, this paper expounds the application effect of new media in the agricultural field of Anhui Province from three perspectives of the government, agricultural enterprises and farmers. It analyzes the problems existing in the application of new media in rural e-commerce in Anhui Province. They are: the new media market is still full of problems; The infrastructure construction of rural e-commerce is relatively poor; Farmers lack the guidance of professional talents; Farmers' acceptance and learning ability is poor. The paper puts forward suggestions for the development status and problems of new media in rural areas of Anhui Province. They are: the provincial government should continue to promote the new media market order; all e-commerce enterprises should actively undertake social responsibility; rural e-commerce entrepreneurs should actively promote professional operation; farmers should actively change their views on new media

A Blockchain System Based on Quantum-Resistant Digital Signature

Blockchain, which has a distributed structure, has been widely used in many areas. Especially in the area of smart cities, blockchain technology shows great potential. The security issues of blockchain affect the construction of smart cities to varying degrees. With the rapid development of quantum computation, elliptic curves cryptosystems used in blockchain are not secure enough. This paper presents a blockchain system based on lattice cipher, which can resist the attack of quantum computation. The most challenge is that the size of public keys and signatures used by lattice cryptosystems is typically very large. As a result, each block in a blockchain can only accommodate a small number of transactions. It will affect the running speed and performance of the blockchain. For overcoming this problem, we proposed a way that we only put the hash values of public keys and signatures on the blockchain and store the complete content of them on an IPFS (interplanetary file system). In this way, the number of bytes occupied by each transaction is greatly reduced. We design a bitcoin exchange scheme to evaluate the performance of the proposed quantum-resistant blockchain system. The simulation platform is verified to be available and effective

Bubble-water/catalyst triphase interface microenvironment accelerates photocatalytic OER via optimizing semi-hydrophobic OH radical

Photocatalytic water splitting (PWS) as the holy grail reaction for solar-to-chemical energy conversion is challenged by sluggish oxygen evolution reaction (OER) at water/catalyst interface. Experimental evidence interestingly shows that temperature can significantly accelerate OER, but the atomic-level mechanism remains elusive in both experiment and theory. In contrast to the traditional Arrhenius-type temperature dependence, we quantitatively prove for the first time that the temperature-induced interface microenvironment variation, particularly the formation of bubble-water/TiO2(110) triphase interface, has a drastic influence on optimizing the OER kinetics. We demonstrate that liquid-vapor coexistence state creates a disordered and loose hydrogen-bond network while preserving the proton transfer channel, which greatly facilitates the formation of semi-hydrophobic •OH radical and O-O coupling, thereby accelerating OER. Furthermore, we propose that adding a hydrophobic substance onto TiO2(110) can manipulate the local microenvironment to enhance OER without additional thermal energy input. This result could open new possibilities for PWS catalyst design

Immobilization of Genetically-Modified d-Amino Acid Oxidase and Catalase on Carbon Nanotubes to Improve the Catalytic Efficiency

d-amino acid oxidase (DAAO) and catalase (CAT) have been genetically modified by fusing them to an elastin-like polypeptide (ELP). ELP-DAAO and ELP-CAT have been separately immobilized on multi-walled carbon nanotubes (MWNTs). It has been found that the secondary structures of the enzymes have been preserved. ELP-DAAO catalyzed the oxidative deamination of d-alanine, and H2O2 was evolved continuously. When the MWNT-supported enzymes were used together, the generated hydrogen peroxide of ELP-DAAO could be decomposed in situ. The catalytic efficiency of the two immobilized enzymes was more than five times greater than that of free ELP-DAAO when the ratio of immobilized ELP-CAT to immobilized ELP-DAAO was larger than 1:1

A Novel Hybrid Polymer Network for Efficient Anticorrosive and Antibacterial Coatings

By in situ simultaneous polymerization of dopamine and hydrolytic polycondensation of 3-aminopropyltriethoxysilane in an aqueous solution, a novel hybrid polymer network coating on stainless steel was formed. The polydopamine and silica hybrid polymer (PDSHP) adhered strongly on the surface of stainless steel. The PDSHP film provides active catechol and primary amine groups. Branched polyethylenimine was grafted based on the PDSHP film. The structure and morphology of the multilayer coating were characterized by attenuated total reflectance Fourier transform infrared spectroscopy reflectance, X-ray photoelectron spectroscopy, and atomic force microscopy and scanning electron microscopy images. The coatings on the stainless steel substrates exhibited anticorrosion of seawater. By making use of the primary amine groups on the multilayer coating, a biocidal agent 3-chloro-2- hydroxypropyl­trimethyl­ammonium chloride (CHPTAC) was grafted. The grafted CHPTAC was effective in killing bacteria, extending the multilayer polymer coating with biocidal functionality

Effect of 2’-Fucosyllactose on Beige Adipocyte Formation in 3T3-L1 Adipocytes and C3H10T1/2 Cells

2’-Fucosyllactose (2’-FL), the functional oligosaccharide naturally present in milk, has been shown to exert health benefits. This study was aimed to investigate the effect of 2’-fucosyllactose (2’-FL) on the browning of white adipose tissue in 3T3-L1 adipocytes and C3H10T1/2 cells. The results revealed that 2’-FL decreased lipid accumulations with reduced intracellular triglyceride contents in vitro. 2’-FL intervention increased the mitochondria density and the proportion of UCP1-positive cells. The mRNA expressions of the mitochondrial biogenesis-related and browning markers (Cox7a, Cyto C, Tfam, Ucp1, Pgc1α, Prdm16, Cidea, Elovl3, Pparα, CD137, and Tmem26) were increased after 2’-FL intervention to some extent. Similarly, the protein expression of the browning markers, including UCP1, PGC1α, and PRDM16, was up-regulated in the 2’-FL group. Additionally, an adenosine monophosphate-activated protein kinase (AMPK) inhibitor, compound C (1 μM), significantly decreased the induction of thermogenic proteins expressions mediated by 2’-FL, indicating that the 2’-FL-enhanced beige cell formation was partially dependent on the AMPK pathway. In conclusion, 2’-FL effectively promoted the browning of white adipose in vitro

Construction of Fe-doped NiS-NiS2 Heterostructured Microspheres Via Etching Prussian Blue Analogues for Efficient Water-Urea Splitting

Developing efficient and robust non-precious-metal-based catalysts to accelerate electrocatalytic reaction kinetics is crucial for electrochemical water-urea splitting. Herein, Fe-doped NiS-NiS2 heterostructured microspheres, an electrocatalyst, are synthesized via etching Prussian blue analogues following a controlled annealing treatment. The resulting microspheres are constructed by mesoporous nanoplates, granting the virtues of large surface areas, high structural void porosity, and accessible inner surface. These advantages not only provide more redox reaction centers but also strengthen structural robustness and effectively facilitate the mass diffusion and charge transport. Density functional theory simulations validate that the Fe-doping improves the conductivity of nickel sulfides, whereas the NiS-NiS2 heterojunctions induce interface charge rearrangement for optimizing the adsorption free energy of intermediates, resulting in a low overpotential and high electrocatalytic activity. Specifically, an ultralow overpotential of 270 mV at 50 mA cm(-2) for the oxygen evolution reaction (OER) is achieved. After adding 0.33 M urea into 1 M KOH, Fe-doped NiS-NiS2 obtains a strikingly reduced urea oxidation reaction potential of 1.36 V to reach 50 mA cm(-2), around 140 mV less than OER. This work provides insights into the synergistic modulation of electrocatalytic activity of non-noble catalysts for applications in energy conversion systems.Funding Agencies|Science and Technology Commission of Shanghai MunicipalityScience &amp; Technology Commission of Shanghai Municipality (STCSM) [19ZR1418100]; Science and Technology Program of Shanghai [21010500300]; STINT Joint China-Sweden Mobility Project [CH2017-7243]; Swedish Government strategic faculty grant in material science (SFO, MATLIU) in Advanced Functional Materials (AFM) [VR Dnr. 5.1-2015-5959]; Shanghai Engineering Research Center of Intelligent Computing System [19DZ2252600]</p