Judul: Aplikasi Selulosa-g-Poliakrilamida sebagai Fase Diam Kromatografi Kolom dan Sintesisnya Melalui Reaksi Kopolimerisasi Cangkok dan Taut-Silang
Abstrak: The graft and crosslink copolymerization of acrylamide to cellulose isolate have been carried out using N,N’-methylene-bis-acrylamide (MBA) as crosslinker and ammonium peroxydisulfate as initiator. The amount of MBA added were 1.0, 1.5, and 2.0 g. Grafting ratio and efficiency of cellulose-g-polyacrylamide using MBA 2.0 g were the highest, while water absorption capacity was the lowest. Infrared spectrum showed the presence of amide and hydroxyl as well as ether functional groups. Pore size distribution of the product was classified as mesoporous (3.6 nm in diameter). Scanning electron micrograph showed a more tight surface morphology on cellulose-g-polyacrylamide with addition of 2.0 g MBA. Performances of the product were evaluated by high performance liquid chromatography using Curcuma xanthorrhiza extract. The selectivity and resolution value of xanthorrhizol separation in the stationary phase synthesized from 2.0 g MBA addition were 1.276 and 1.870, respectively. Nuclear magnetic resonance spectrum and specific rotation value of the isolated xanthorrhizol proved that the stationary phase did not change the structure and the three-dimensional configuration of the xanthorrhizol, so that it can be proposed as a highly useful value in commercial development.
Keyword: graft copolymerization, crosslinker, chromatography, cellulose

Judul: Sintesis Selulosa-g-Poliakrilamida Melalui Teknik Kopolimerisasi Cangkok dan Taut-Silang
Abstrak: Cellulose-g-polyacrylamide copolymer has been synthesized by graft and crosslink copolymerization using acrylamide as monomer and N,N’-methylenebis- acrylamide as crosslinker. The synthesis was carried out at 70 °C through radical polymerization by using ammonium persulphate as initiator under N2 atmosphere. The functional groups and morfology of the product were characterized by using infrared spectroscopy and scanning electron microscopy, respectively. The infrared spectra and the micrographs confirmed that graft and crosslink copolymerization has been successfully carried out onto cellulose isolates. Increasing crosslinker concentration increased the grafting ratio and efficiency, while the water absorption capacity was decreased. The grafting ratio and efficiency were 27.27–39.02% and 80.78–90.06%, respectively, while water absorption capacity was ranged between 1.6343 and 3.0747. Modification products have better resistance against solvents (ethyl acetate, heptane, hexane, and toluene) and low water absorption capacity so are potencial to be applied as stationary phase.
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Judul: Ragam jenis ektoparasit burung tekukur (Streptopelia chinensis) dan burung puter (Streptopelia bitorquata) di penangkaran
Abstrak: Spotted dove and Javan turtle dove are the bird species that are easily raised in captivity. Nevertheless, good management is required to successfully breed and raise the birds in captivity; otherwise, the condition may endanger the sustainability of the two bird species. Information on ectoparasites on the bodies of this bird as well as their captivity breeding has not been available, although admittedly taking ectoparasites from these bird families has much been done so that a research is obviously needed. This study aimed to find out various kinds of Spotted dove and Javan turtle dove ectoparasites and to learn various kinds of parasitic insects around the Spotted dove and Javan turtle dove cages. The study was conducted from April to June 2010. The methods of data collection included the general condition of the location, collection of ectoparasites specimens, processing and specimens identification. The data analysis was done descriptively and tabulated with the degree of infestation. The kinds of ectoparasites from the class of insects found in the body of Spotted dove were Goniocotes sp. and Columbicola columbae of phthiraptera order and Pseudolynchia canariensis of diptera order, and arachnida class, that is, tungau from the pterolichidae family. In terms of ectoparasites, Spotted dove and Javan turtle dove were similar, except that Javan turtle dove had no Pseudolynchia canariensis. Goniocotes sp. and Columbicola columbae were mallopaga order (biting lice) and were obligate. The kinds of parasitic insects in the vicinity of Spotted dove and Javan turtle dove cages were from the Ordo Diptera. The diptera classified as parasites included Anopheles, Culex, Psychodidae, Culicoides and Simulium, most of them vectors of disease. The presence of ectoparasites was closely related to how a breeding place is managed.
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