Judul: Pengaruh Natrium Dodesil Sulfat dan Heksadesiltrimetilamonium Bromida terhadap Adsorptivitas Campuran Kaolin-Limbah Padat Tapioka dalam Menjerap Biru Metilena
Abstrak: Adsorption is the most efficient method for removing colourants, but adsorbent modification with surfactant is still rarely performed, surfactant can change the selectivity of adsorbent by modifing its surface charge. Natrium dodecyl sulphate (NDS) and hexadecyltrimethylammonium bromide (HDTMABr) are anionic and cationic surfactant used in this study. Adsorbent (mixture of kaolin-tapioca solid waste) (75:25) were soaked with surfactant (NDS and HDTMA-Br) at concentration 0, 50, 100, 300, and 600% CMC (critical micelle concentration). The result showed that the control adsorbent (0% CMC surfactant) had adsorptivity of 7.50 mg/g. NDS solution could increase the adsorptivity of adsorbent, while the adsorbent immersed in HDTMA-Br decreased the adsorptivity as compared with the control treatment. Isotherm adsorption for methylene blue using the best adsorbent (adsorbent with soaking 600% CMC NDS), followed Freundlich isotherm.
Keyword: 

Judul: Adsorben berbasis limbah padat tapioka
Abstrak: The use of agroindustrial waste and clay mineral have been studied as alternative adsorbents for dyes, such as cibacron blue. In this research, tapioca solid waste, kaolin, bentonite, and the mixture of tapioca solid waste and kaolinite or bentonite were used as adsorbents for cibacron blue. Acid and base treatments were carried out to activate the adsorbents. Adsorption was varied with adsorption times and adsorbent weight. The result showed that acid activated tapioca solid waste had the highest adsorption capacity. The optimum adsorption time and adsorbent tapioca solid waste weight was 75 minutes and 1 g. The cibacron blue concentration decrease from 50 mg/L to 11.12 mg/L. On the other hand, the optimum condition for commercially activated carbon were 30 minutes and 0.5 g with concentration decreasing from 50 mg/L to 19.44 mg/L. The adsorption capacity for acid activated tapioca solid waste and activated carbon were 1.94 mg/g and 3.05 mg/g adsorbent respectively. With adsorption efficiency were 77.75% and 61.11%. Acid activated tapioca solid waste were followed Freundlich isotherm.
Keyword: 

Judul: Pengamatan penyakit rabies pada kelelawar (Chiroptera) di daerah kota dan Kabupaten Bogor
Abstrak: Rabies pada satwa liar khususnya kelelawar sering terjadi di beberapa negara maju seperti Amerika serikat, Kanada dan Amerika Latin, ini merupakan jenis silvatik rabies yaitu rabies yang terjadi di daerah daerah pegunungan dan hutan. Banyak kasus yang telah dilaporkan sehubungan dengan kasus tersebut. Penelitian ini bertujuan untuk mengetahui ada tidaknya penyebaran rabies. pada kelelawar (Chiroptera) di Indonesia khususnya di Bogor. Telah dilakukan permulaan pemeriksaan terhadap sepuluh ekor kelelawar yang dikumpulkan dari kota dan kabupaten Bogor yang diambil otaknya dengan menggunakan uji Seller, FAT (Flouresecent Antibody Technique) dan biologis, untuk mengetahui ada atau tidaknya virus rabies. Hasil pengamatan menunjukkan bahwa dari sampel otak kelelawar diperoleh hasil negatif atau tidak ditemukan adanya virus rabies pada sampel tersebut.
Keyword: Chiroptera, rabies, bats