Papers by Keyword: Seed

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Authors: Josée Colbert, Dominique Bouchard
Abstract: A heat transfer model was built to predict the temperature evolution of semi-solid aluminum billets produced with the SEED process. An inverse technique was used to characterize the heat transfer coefficient at the interface between the crucible and the semi-solid billet. The effect of several process parameters on the heat transfer coefficient was investigated with a design of experiments and the coefficient was inserted in a computer model. Numerical simulations were carried out and validated with experimental results.
Authors: N.S. Abed Negmatova, S.S. Negmatov, G. Gulyamov, J.N. Negmatov
Abstract: We researched and developed the composite polymer materials and products from them, working in conjunction with raw-cotton. It is established that the production of friction pairs of working parts of machines (pegs) made of developed composite polymer materials increases their efficiency and durability to 2.0 -2.2 times.
Authors: B.C. Cavenett, S.Y. Wang, K.A. Prior
Authors: Sheng Jia Zheng, Jian Jun Liu, Tie Jun Li
Abstract: In order to provide low power consumption LFSR seed for BIST structure,this paper proposed a seed calculation Methods of dynamic-pseudo-random test sequence, it can reseed for LFSR and cut off test sequence of the low fault coverage effectively. The seed can generation fixed length pseudo-random test sequence, the sequence reduce test time and number of test vectors mostly. Experimental results that this technique can reduce the length of vectors, shorten test time and low power consumption based on without reduce the fault coverage
Authors: Tian Yi Shang, Yi Bin Zhang, Yan Liu
Abstract: Red wines were made from Vitis vinifera cv. Cabernet Sauvignon in China at different methods of maceration. The effects of adding seeds during maceration on the quality characteristics, in terms of colour, aroma profile and sensory characteristics, of the wines before bottling were evaluated, and made a comparison with the effects of adding skins. Seed contact treatments raised wine colour intensity, proanthocyanidins, tannins, and polyphenols content in comparison to the control wines. However, as indicated in the sensory evolution, the significant increase in astringency intensity was found in the wines with seed contact. Besides, the bitterness of the red wine also increased in the wines with seed contact, but it was not significantly
Authors: Qing Song Yang, Yan Zhao
Abstract: Metal toxicity is an important factor governing germination and growth of plants. We have investigated how Co2+ and Ni2+ treatment affected germination and early growth stage of oilseed rape (Brassica napus L.). The results showed that the single pollution of Co2+was capable to stimulate the seed germination and seedling growth of oilseed rape at lower concentration, but the phenomena did not exist by the single pollution of Ni2+. Not only polluted by Co2+ but also by Ni2+, all indexes of germination and growth reduced gradually at higher concentration among examined concentration of heavy metals. Meanwhile, effects of Ni2+single pollution were stronger than that of Co2+single pollution.
Authors: Adriana Medina-Ramirez, Alicia Amairani Flores-Diaz
Abstract: Zeolites posses a high stability, high specific surface area and pores tridimensional system that make them useful to formation of inorganic membranes. During membranes synthesis different parameters should be considered such as nature substrate and the method used in order to obtain a membrane according to its application field. In the present work the formation of a zeolitic layer on the functionalized surface of zirconia substrates was studied. Zirconia disks of ten millimeters of diameter were prepared. They were submitted a chemical functionalization with three different chemical linkers: polyethylenimine (PEI), polydialildimethylamine chloride (PDDA) and 3-aminopropyltriethoxysilane (γ-APS). Subsequently the substrates were submitted to a seeding process, where their surface was grafted with zeolitic crystals corresponding to W zeolite. In order to promote the formation of zeolitic layer the substrates were submitted a hydrothermal treatment with a batch composition similar to that used in the W zeolite synthesis, at 150°C for 48 h. The crystallization products were characterized by XRD and SEM techniques. The results indicated that the chemical linker enhances the formation of a homogeneous zeolitic layer on the substrate and besides acts as structural directing agent allowing to crystallization of a different zeolitic phase to that used in the seeding process, the merlinoite. The morphology, crystalline phase and thickness of zeolitic layer formed on the surface of the substrate depend of the nature of chemical linker used and its interaction with the substrate.
Authors: Yong Dong Sun, Xin Zheng Li, He Lian Yang, Li Sun
Abstract: The present study was conducted to investigate the effect of seed priming techniques on germination characteristics of C. maxima Duch. cultivar (Beiguan). Treatments were combinations of 3 levels of priming (distilled water, NaCl and PEG6000) and non-priming (control) with 3 replications. Concentrations of NaCl solution were 50, 100, 150, 200 mmol•L-1, and polyethylene glycol (PEG) 6000 were 10%, 20%, 30%, 40%, respectively. Seeds were primed using the above priming materials for 24 hours at 20°C in the dark, respectively. The results showed that different priming techniques could have various effects on germination of Beiguan seeds. Hydropriming (distilled water), NaCl priming and PEG6000 priming (10%) all improved the germination characteristics of Beiguan, compared to the control. NaCl priming was more effective than hydropriming and PEG6000 priming and was the most successful technique in this study. These findings indicated that seed priming techniques could accelerate germination process and were simple and cheap, we should propose these methods to farmers.
Authors: Mamoru Mitomo, C.M. Wang, Fang Fang Xu, Naoto Hirosaki, Y. Bando
Authors: Keun Ju Park, Dong Seok Seo, Woo Yang Jang, Jong Kook Lee
Abstract: Nano-sized silver particles are considered to apply a silver paste for electrode because of its high conductivity on sintering at low temperature. In this study, silver nanoparticles as seeds were prepared by chemical reduction method with capping agent. Silver particles were prepared using SDS (Sodium dodecyl sulfate) as a surfactant and silver nanoparticles as seeds and reacted with ascorbic acid as a reduction agent. The silver seeds with 10-20 nm in size with uniform distribution were formed and the size and shape of silver particles were strongly dependent on the concentration of surfactant.
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