Results 221 to 230 of about 55,043 (263)
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Proceedings of the seventh ACM SIGKDD international conference on Knowledge discovery and data mining, 2001
In this paper, we present PVA, an adaptive personal view information agent system to track, learn and manage, user's interests in Internet documents. When user's interests change, PVA, in not only the contents, but also in the structure of user profile, is modified to adapt to the changes. Experimental results show that modulating the structure of user
Chien Chin Chen +2 more
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In this paper, we present PVA, an adaptive personal view information agent system to track, learn and manage, user's interests in Internet documents. When user's interests change, PVA, in not only the contents, but also in the structure of user profile, is modified to adapt to the changes. Experimental results show that modulating the structure of user
Chien Chin Chen +2 more
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Biodegradation of PVA‐based formulations
Macromolecular Symposia, 1999AbstractInvestigation of the biodegradability of water soluble poly(vinyl alcohol) (PVA) based blown films was carried out under different lab‐scale environmental conditions. In particular respirometric tests were utilized in order to evaluate the biodegradability of PVA films in composting, in modified Sturm test and in soil burial simulation tests ...
CHIELLINI, EMO +3 more
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On characteristics of PVA/CdS and PVA/CdS:Cu nanocomposites for applications as LED
Journal of Luminescence, 2013Abstract We report the synthesis of poly vinyl alcohol/cadmium sulphide (PVA/CdS) and polyvinyl alcohol/cadmium sulphide:copper (PVA/CdS:Cu) nanocomposites by chemical route. Characterizations are done by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high resolution transmission electron ...
Jumi Kakati, Pranayee Datta
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2018
The polyvinyl acetate (PVA) adhesives are most effectively used in simple high volume applications, and they are at a disadvantage only where evaporation of water is difficult, or where faster drying must be achieved. The most significant materials present in a PVA adhesive are polyvinyl acetate, stabilizers, plasticizers, and water.
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The polyvinyl acetate (PVA) adhesives are most effectively used in simple high volume applications, and they are at a disadvantage only where evaporation of water is difficult, or where faster drying must be achieved. The most significant materials present in a PVA adhesive are polyvinyl acetate, stabilizers, plasticizers, and water.
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Thrombin and albumin adsorption to PVA and heparin–PVA hydrogels. 2: Competition and displacement
Journal of Biomedical Materials Research, 1993AbstractThrombin adsorption to polyvinyl alcohol (PVA) was different from its adsorption to polyethylene (PE)—not so much in amount, but in its affinity. Thrombin was more easily displaced from polyethylene and its adsorption was more readily prevented by prior or simultaneous exposure to albumin.
B A, Smith, M V, Sefton
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Archives of Microbiology, 2007
Polyvinyl alcohol (PVA)-utilizing Sphingopyxis sp. 113P3 (re-identified from Sphingomonas sp. 113P3) removed almost 0.5% PVA from culture supernatants in 4 days. Faster degradation of 0.5% PVA was performed by the periplasmic fraction. The average molecular size of PVA in the culture supernatant or cell-bound PVA was gradually shifted higher ...
Xiaoping, Hu +4 more
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Polyvinyl alcohol (PVA)-utilizing Sphingopyxis sp. 113P3 (re-identified from Sphingomonas sp. 113P3) removed almost 0.5% PVA from culture supernatants in 4 days. Faster degradation of 0.5% PVA was performed by the periplasmic fraction. The average molecular size of PVA in the culture supernatant or cell-bound PVA was gradually shifted higher ...
Xiaoping, Hu +4 more
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Investigation of a-PVA/s-PVA hydrogels prepared by freezing-thawing method
Fibers and Polymers, 2012The hydrogels of atactic poly (vinyl alcohol) (a-PVA) and syndiotactic poly (vinyl alcohol) (s-PVA) with different blend ratios were prepared by freezing-thawing processes. The effect of s-PVA on gelation behavior of the blend was investigated in terms of gelation temperature (Tgel) and hydrogel melting temperature (Tgm).
Mei Huang +7 more
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Kinetics Analysis of Thermal Degradation Reaction of PVA and PVA/Starch Blends
Journal of Reinforced Plastics and Composites, 2008The kinetics of thermal degradation of PVA and PVA/starch (40/60) blends were investigated by thermogravimetry (TGA) and derivative thermogravimetry (DTG). Experiments under non-isothermal conditions were carried out for samples in nitrogen at heating rates of 5, 10, 15 and 20°C/min.
Xiang-Yang Zhou +3 more
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Lem bookbinding yang cepat dan kuat, dan kapan kekuatannya jadi masalah PVA itu lem yang dipakai hampir semua pengrajin jurnal karena kuat dan cepat, padahal tidak semua PVA aman buat buku yang ingin awet, dan kebanyakan orang tidak pernah cek bedanya.
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anohybrid PVA/ZrO_2 and PVA/Al_2 O_3 Electrospun Mats
2008Electrochemical planar sensors using Nb2O5 powders to fabricate sensing electrodes were tested both in laboratory and “in-situ”, i.e. downstream a three-way catalytic converter of a FIAT fire 1242 c.c. spark ignition engine. Two cell configurations were compared, one with and the other without Pt paste under the metal oxide electrode.
CHEVALLIER, L +2 more
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