The Experts below are selected from a list of 15312 Experts worldwide ranked by ideXlab platform

De-fang Zeng - One of the best experts on this subject based on the ideXlab platform.

  • Preparation of a Novel Environmental Soybean Seed Coating Agent
    Journal of Agricultural Chemistry and Environment, 2018
    Co-Authors: Wenjin Wang, De-fang Zeng
    Abstract:

    In the study, a novel environmental soybean seed Coating Agent was made of natural polymer, trace elements, trace fertilizer and biopesticides etc., with the condition of high performance-to-price ratio and environmental friendliness. Effects of this soybean seed Coating Agent on soybean yield were tested through the laboratory and farm experiments. The tested results showed that the soybean yield using this seed Coating Agent was increased by 15.46%, and its cost was decreased by 27.8%, compared with the conventional soybean seed Coating Agent. It’s nontoxic and harmless to human and animals, more friendly to the environment. So it has obvious economic and environmental benefits.

  • Preparation and mechanism analysis of an environment-friendly maize seed Coating Agent.
    Journal of the science of food and agriculture, 2017
    Co-Authors: De-fang Zeng, Wenjin Wang, Zhao Fan, Xu Tian, Mingchun Zhou
    Abstract:

    Traditional seed Coating Agents often contain toxic ingredients, which contaminate the environment and threaten human health. This paper expounds a method of preparing a novel environment-friendly seed Coating Agent for maize and researches its mechanism of action. The natural polysaccharide polymer, which is the main active ingredient of this environment-friendly seed Coating Agent, has the characteristics of innocuity and harmlessness, and it can replace the toxic ingredients used in traditional seed Coating Agents.; Results: This environment-friendly seed Coating Agent for maize was mainly made up of the natural polysaccharide polymer and other additives. The field trials results showed that the control efficacy of Helminthosporium maydis came to 93.72%, the anti-feeding rate of cutworms came to 81.29%, and the maize yield was increased by 17.75%. Besides, the LD50 value (half the lethal dose in rats) of this seed Coating Agent was 10 times higher than that of the traditional seed Coating Agents. This seed Coating Agent could improve the activity of plant protective enzymes (peroxidase, catalase and superoxidase dismutase) and increase the chlorophyll content.; Conclusion: This seed Coating Agent has four characteristics of disease prevention, desinsectization, increasing yield and safety. Results of mechanism analyses showed that this seed Coating Agent could enhance disease control effectiveness by improving plant protective enzymes activity and increase maize yield by improving chlorophyll content. © 2017 Society of Chemical Industry.; © 2017 Society of Chemical Industry.

  • Physicochemical Property Testing of a Novel Maize Seed Coating Agent and Its Antibacterial Mechanism Research
    Open Journal of Soil Science, 2015
    Co-Authors: Qingxiang Deng, De-fang Zeng
    Abstract:

    We used the no pollution natural polymer polysaccharide chitosan as the main raw material, which is supplemented by other additives, to prepare a high-efficiency environmental friendly maize seed Coating Agent. By detecting the seed quality, maize seedling indexes, which include root activity, chlorophyll content and malondialdehyde (MDA) content, and through the results we found that this seed Coating Agent could improve the photosynthetic capacity and enhance seedling resistance. Laboratory bacteriostasis test and study showed that the antibacterial rate of this seed Coating Agent has reached more than 88%. Meanwhile, we analyzed and studied the antimicrobial mechanism of the seed Coating Agent.

  • Activity test and mechanism study of an environmentally friendly wheat seed Coating Agent
    Agricultural sciences, 2013
    Co-Authors: De-fang Zeng, Huifang Zhao
    Abstract:

    This novel environmentally friendly wheat seed Coating Agent which has been made with natural polymer as the primary material could increase yield by about 9% compared with the conventionally virulent wheat seed Coating Agent. In the premise of this production, the content of malondialdehyde (MDA) and peroxidase (POD) was determined. The results show that, after treated by the self-made wheat seed Coating Agent, the contents of the MDA were less than traditional group and the blank control group and POD contents were higher than traditional group and blank control group, this provides a good foundation on the further research of self-control wheat seed Coating Agent.

  • Preparation and Study of a Novel, Environmentally Friendly Seed-Coating Agent for Wheat
    Communications in Soil Science and Plant Analysis, 2012
    Co-Authors: De-fang Zeng, Fang Wang, Zhen-e Wang
    Abstract:

    Traditional seed-Coating Agents are widespread and used in crop protection. However, the Coatings can pose an environmental and health hazard. In this study, a novel wheat seed-Coating Agent was prepared by using natural polysaccharide as the main raw material, which produces bacteriostatic activity and enhances the germination and quality of seeds. The optimum formula of this seed-Coating Agent was ultimately determined through a series of laboratory experiments and field trials. The results showed that the yield of wheat seeds treated with this novel seed-Coating Agent was increased by 10% and its material cost was decreased by 15% compared with the conventional toxic seed-Coating Agent. The toxicity of the novel seed-Coating Agent was also less than that of the traditional one. Therefore, this wheat seed-Coating Agent had obvious economic and environmental benefits.

Chen Yonggang - One of the best experts on this subject based on the ideXlab platform.

  • water based pu anechoic Coating Agent for artificial leather
    2013
    Co-Authors: Qi Chunhong, Chen Yonggang
    Abstract:

    The invention discloses a water-based PU anechoic Coating Agent for artificial leather. The Agent is composed of the following raw materials, by weight: 20-25 parts of an aqueous polyurethane resin, 10-20 parts of a water-based paint resin, 60-65 parts of water, 0.5-1 part of a modified organosilicon polymer, 0.5-1 part of an organosilicon flatting Agent, 0.5-1 part of an organosilicon defoaming Agent, and 1-4 parts of an aqueous polyurethane thickener. The components in the water-based PU anechoic Coating Agent for artificial leather provided by the invention are in scientific and reasonable proportion, and mutually coordinate and interact with each other; the anechoic Coating Agent has advantages of good film-forming property, firm bonding, solvent resistance, hydrolysis resistance and thermal aging resistance; a product produced from artificial leather treated by the anechoic Coating Agent provided by the invention has intact original leather surface effect; especially, the combined application of modified organosilicon polymer and polyurethane resin enables the treated leather surface to have unique good anechoic effect and quite good handle; and the artificial leather has good permeability, and excellent comprehensive effects in handle, water resistance and binding.

  • water based pu Coating Agent capable of realizing dry and sliding handle for artificial leather
    2013
    Co-Authors: Qi Chunhong, Chen Yonggang
    Abstract:

    The invention relates to a water-based PU Coating Agent capable of realizing dry and sliding handle for artificial leather. The Coating Agent is composed of the following raw materials, by weight: 30-40% of an aqueous polyurethane resin, 45-55% of water, 2-2.5% a modified organosilicon polymer, 5-7% of modified amino silicone oil, 1-3% of a silicone oil smoothing Agent, 3-4% of an organosilicon defoaming Agent and 0.5-2% of a waterborne polyurethane thickener. Water is used as a solvent to substitute toxic solvents, such as DMF and MEK, so that the product has characteristics of non-combustibility, non-toxicity and no pollution; and components of the dry and sliding handle coting Agent coordinate and act together to realize good film-forming property, firm bonding, solvent resistance, cold resistance, hydrolysis resistance and thermal aging resistance; and the Coating Agent does not affect the original effect of the leather surface of the produced product, so as to fundamentally eradicate poison problem of a solvent type slurry for artificial leather.

Y K Eriwati - One of the best experts on this subject based on the ideXlab platform.

  • Effect of salivary pH on diametral tensile strength of glass ionomer cement coated with Coating Agent
    Journal of Physics: Conference Series, 2017
    Co-Authors: Farahdillah, S Triaminingsih, Y K Eriwati
    Abstract:

    The aim of this study was to analyze the effect of salivary pH to diametral tensile strength of glass ionomer cement (GIC) coated with a Coating Agent. GIC specimens coated with varnish and nano-filled Coating Agent were stored in artificial saliva at pH values of 4.5, 5.5, and 7 for 24 h at 37°C, then the diametral tensile strength was tested by universal testing machine. Results showed that there was no significant difference in the diametral tensile strength of the GIC coated with varnish and nano-filled Coating Agent with decreasing of salivary pH (p < 0.05). It can be concluded that salivary pH does not affect the diametral tensile strength of GIC coated by varnish or nano-filled Coating Agent

  • The effect of salivary pH on diametral tensile strength of resin modified glass ionomer cement coated with Coating Agent
    Journal of Physics: Conference Series, 2017
    Co-Authors: D Ismayanti, S Triaminingsih, Y K Eriwati
    Abstract:

    The aim of this study was to evaluate the effect of artificial saliva with different acidities on the diametral tensile strength of Resin Modified Glass Ionomer Cement (RMGIC) coated with varnish and nanofilled Coating Agent. The specimens coated with Coating Agents were immersed in artificial saliva with pH of 4.5, 5.5, and 7 for 24 hours in an incubatorat 37°C. The diametral tensile strength of the specimens was tested with Universal Testing Machine. There were no significant differences on the diametral tensile strength of all specimens that were put into groups based on the acidity of the saliva and the type of Coating Agent (p>0.05). Both varnish and nanofilled Coating Agent stayed on the RMGIC in the acidic condition that simulated the true condition of oral cavity in people with high caries risk for the 24 hours of maturation.

Qi Chunhong - One of the best experts on this subject based on the ideXlab platform.

  • water based pu anechoic Coating Agent for artificial leather
    2013
    Co-Authors: Qi Chunhong, Chen Yonggang
    Abstract:

    The invention discloses a water-based PU anechoic Coating Agent for artificial leather. The Agent is composed of the following raw materials, by weight: 20-25 parts of an aqueous polyurethane resin, 10-20 parts of a water-based paint resin, 60-65 parts of water, 0.5-1 part of a modified organosilicon polymer, 0.5-1 part of an organosilicon flatting Agent, 0.5-1 part of an organosilicon defoaming Agent, and 1-4 parts of an aqueous polyurethane thickener. The components in the water-based PU anechoic Coating Agent for artificial leather provided by the invention are in scientific and reasonable proportion, and mutually coordinate and interact with each other; the anechoic Coating Agent has advantages of good film-forming property, firm bonding, solvent resistance, hydrolysis resistance and thermal aging resistance; a product produced from artificial leather treated by the anechoic Coating Agent provided by the invention has intact original leather surface effect; especially, the combined application of modified organosilicon polymer and polyurethane resin enables the treated leather surface to have unique good anechoic effect and quite good handle; and the artificial leather has good permeability, and excellent comprehensive effects in handle, water resistance and binding.

  • water based pu Coating Agent capable of realizing dry and sliding handle for artificial leather
    2013
    Co-Authors: Qi Chunhong, Chen Yonggang
    Abstract:

    The invention relates to a water-based PU Coating Agent capable of realizing dry and sliding handle for artificial leather. The Coating Agent is composed of the following raw materials, by weight: 30-40% of an aqueous polyurethane resin, 45-55% of water, 2-2.5% a modified organosilicon polymer, 5-7% of modified amino silicone oil, 1-3% of a silicone oil smoothing Agent, 3-4% of an organosilicon defoaming Agent and 0.5-2% of a waterborne polyurethane thickener. Water is used as a solvent to substitute toxic solvents, such as DMF and MEK, so that the product has characteristics of non-combustibility, non-toxicity and no pollution; and components of the dry and sliding handle coting Agent coordinate and act together to realize good film-forming property, firm bonding, solvent resistance, cold resistance, hydrolysis resistance and thermal aging resistance; and the Coating Agent does not affect the original effect of the leather surface of the produced product, so as to fundamentally eradicate poison problem of a solvent type slurry for artificial leather.

Marie-paule Pileni - One of the best experts on this subject based on the ideXlab platform.

  • Coating Agent-induced mechanical behavior of 3D self-assembled nanocrystals
    Physical chemistry chemical physics : PCCP, 2017
    Co-Authors: Arzu Çolak, Jingjing Wei, Imad Arfaoui, Marie-paule Pileni
    Abstract:

    The Young's modulus of three-dimensional self-assembled Ag nanocrystals, as so-called supracrystals, is correlated with the type of Coating Agent as well as the nanocrystal morphology. The Young's moduli of supracrystals of icosahedral Ag nanocrystals are measured in the range of tens to hundreds of megapascals revealing an extremely soft mechanical behavior. The alkylamine molecules used as Coating Agents weakly interact with the Ag nanocrystal surface favoring translational and orientational ordering of atomic lattice planes of nanocrystals. Under such experimental conditions, both the average distance between nanocrystals and the increase of the nanocrystal diameter control the measured Young’s modulus: it increases with decreasing interparticle distance and increasing nanocrystal diameter. When dodecylamine (C12NH2) molecules are replaced by dodecanethiol (C12SH), the orientational ordering between nanocrystals, produced from the same batch as C12NH2, disappears by inducing a drop in the Young’s modulus. This is attributed to the formation of a “skin” at the nanocrystal surface causing a transition from shaped to spherical nanocrystals. Finally, by comparing with various studies performed in our group with Co and Au nanocrystals, we explain the formation of such extremely soft materials with Ag nanocrystals by both the strength of the binding between nanocrystals and Coating Agents and the ligand–ligand interactions.

  • Surface Plasmon Resonance Properties of Silver Nanocrystals Differing in Size and Coating Agent Ordered in 3D Supracrystals
    Chemistry of Materials, 2015
    Co-Authors: Jingjing Wei, Nicolas Schaeffer, Pierre-antoine Albouy, Marie-paule Pileni
    Abstract:

    Silver nanocrystals differing in Coating Agent and size self-assembled into thin supracrystalline films. The surface plasmon resonance (SPR) properties of these assemblies are presented herein. Nanocrystal size, interparticle distance, and Coating Agent play key roles in the plasmonic coupling of Ag nanocrystals within supracrystals. Here, we demonstrate experimentally that the predictions for 2D self-assemblies remains valid for thin 3D superlattices. The absorption spectra in the visible range were found to be markedly dependent on the incidence of the light source and confirmed the appearance of a splitting of the dipolar surface band into two components at increasing incidence angle. The major parameter inducing the splitting of the SPR band was found to be the relative ratio between the average distance of the nanocrystals and their diameters. The nature of the Coating Agent was also found to be of particular importance: Theoretical predictions and experimental data were in agreement for alkylamine-c...