Judul: Pemanfaatan biji alpukat untuk pembuatan arang aktif sebagai adsorben alternatif zat warna pada limbah cair batik
Abstrak: Avocado seeds are agricultural waste containing starch that is potential to be used as raw materials for activated carbon. The purpose of this experiment is to produce an activated carbon from avocado seeds and to be applied for adsorbing remazol dyes on batik effluent. This study performed 2 types of activation, i.e. chemical and physical activations. Chemical activation was performed by submerging the charcoal in KOH 30% and H3PO4 30%, while physical activation performed by steaming at 700 oC for 60 and 90 minutes. The activated carbon with the highest iodine number (AB60) was used to adsorb dyes in batik effluent. The result showed that activated carbon from avocado seeds have a relatively low ability to adsorb dye, as evaluated from the lowering color concentration of remazol dye by 42% in the batik effluent.
Keyword: Bogor Agricultural University (IPB), remazol, batik effluent, avocado seeds, adsorption, active carbon

Judul: Penjerapan zat warna rreaktif cibacron red menggunakan adsorben sekam padi
Abstrak: Textile wastewater containing dyes can pollute aquatic environment. This study utilized rice husk as adsorbent for Cibacron Red reactive dyes which are widely used in textile industries. Husks were made into adsorbent without modification (ATM) and acid modified adsorbent (AMA). The optimum condition was obtained under adsorption time of 30 minutes, 1.0 g of adsorbent, and initial concentration of dye solution was 150 ppm. The optimum condition for AMA was obtained under adsorption time of 60 minutes, 2.0 g of adsorbent, and 150 ppm initial concentration of dye solution. The optimum condition of activated charcoal (AA) as a comparison was 30 minute time of adsorption, 3.0 g of adsorbent, and 150 ppm initial concentration dye solution. Adsorption capacity of ATM, AMA, and AA at the optimum conditions was 2879.00, 6898.30, and 2470.00 μg/g, respectively. Adsorption efficiency of ATM, AMA, and AA at the optimum conditions was 19.86, 91.71, and 40.51%, respectively. All three types of adsorbent followed the Freundlich isotherm. Application of the adsorbent on waste of textile manufacture showed a decrease in colour after adsorption by ATM, AMA, and AA, up to 52.05, 98.86 and 48.69%, respectively, with the initial colour intensity of 1485 Pt-Co. Starting with COD of the wastewater which was 7372.0 mg/L, the values decreased after the adsorption with ATM, AMA, and AA were 43.30, 98.56 and 52.58%, respectively. Starting with BOD of 149.09 mg/L, the values decreased after adsorption by ATM, AMA, and AA were 63.41, 76.09, and 72.46%, respectively. Based on these results, rice husk is potentially used as an adsorbent of dyes, thereby reducing the level of pollution of aquatic environment.
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Judul: Aspek klinis canine ehrlichiosis
Abstrak: Canine ehrlichiosis adalah suatu penyakit yang menye- rang Canidae dan disebabkan oleh Rickettsia, yaitu Ehrli- chia canis. Organisme ini berkembang dalam sitoplasma leukocyt, terutama monocyt, dengan cara pembelahan seder- hana. Selain leukocyt, kadang-kadang organisme menyerang hystiocyt, sel-sel endothel, dan sel-sel batang (stem cells) dari sumsum tulang. Pada percobaan in vitro, Ehrlichia canis dapat berkembang dalam kultur monocyt yang berasal dari darah anjing. Canine ehrlichiosis ditemukan pertama kali pada tahun 1935, tetapi baru benar-benar diperhatikan pada permulaan tahun 1963, dan sampai kini telah tersebar di daerah tropis dan subtropis di seluruh dunia. Kejadian penyakit ini di Indonesia, dilaporkan secara resmi pada tahun 1983. Induk semang Ehrlichia canis adalah vertebrata dan invertebrata. Canidae merupakan induk semang vertebrata. Caplak Rhipicephalus sanguineus, selain sebagai induk semang invertebrata, juga bertindak sebagai vektor dalam penyebaran penyakit. Masa inkubasi canine ehrlichiosis bervariasi antara 10- 15 hari. Gejala klinik yang tidak pathognomonis menyebabkan perlunya pemeriksaan laboratorium untuk mendiagnosa penyakit ini. Pada pemeriksaan darah ditemukan keadaan pancytopenia, yaitu jumlah seluruh sel darah mengalami penurunan, dan adanya organisme intrasitoplasma leukocyt. Derajat keparahan penyakit bertambah jika ada infeksi sekunder oleh Babesia canis dan atau Haemobartonella canis yang biasa menyertai penyakit ini. Babesiosis dan haemobartonellosis sering mengacaukan diagnosa karena gejala kliniknya mirip canine ehrlichiosis. Untuk membedakan ketiga penyakit tersebut, juga perlu diadakan pemeriksaan laboratorium. Selain memperhatikan gejala klinik dan pemeriksaan laboratorium, untuk lebih lebih menguatkan diagnosa dapat dipakai uji biologis…dst
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