Judul: Sintesis dan Karakterisasi Membran Polisulfon didadah Karbon Aktif untuk Filtrasi Air
Abstrak: Synthesis and characterization of polysulfone membrane doped activated carbon, which was made from raw material coconut shell and sengon wood, has been performed. Carbonization process was performed at a temperature of 500oC for 4 hours, followed by KOH immersion and steam activation, at a temperature of 850oC for 80 and 110 minutes. Structural characterization of activated carbon/charcoal was determined by scanning electron microscope (SEM) and X-Ray Diffractometer (XRD), and the electrical conductivity was measured using LCRmeter. All of activated carbon have fulfilled the Indonesian National Standard 06-3730-1995, for technical activated charcoal quality, except for the benzene adsorption and some of the iodine adsorption. Activated charcoal without KOH immersion and with steam activation time of 110 minutes of each raw material, were selected as the doping material for membrane, based on their optimum adsorption. Polysulfone membrane doped activated carbon was prepared by phase inversion method. Membrane characterization was determined by flux test with cross-flow method, the degree of swelling, mechanical strong with force sensor, morphological analysis by SEM, and crystallite structure analysis by XRD. Doping of polysulfone membrane with activated carbon, afford to change the characteristic and ability of membrane in water filtration. Membrane with the highest flux was obtained on the membrane doped with activated carbon sengon concentration of 2%. The resulting water flux values was 624.99 L/m2h. This correlates with its degree of swelling, that has the lowest value of 52.17%.
Keyword: 

Judul: Studi Kinerja Membran Polisulfon dengan Pendoping Titanium Dioksida (TiO2) untuk Filtrasi Air Tercemar
Abstrak: Fresh water is an important requirement for human. Fresh water becomes a serious problem if it is contaminated by toxic pollutants. An alternative method for water purification is membrane filtration. Polysulfone are well known in excellent chemical resistance, good thermal stability, and mechanical properties. The research was conducted in biophysics Laboratory, IPB Bogor from January to December 2011. This research consisted of two stages. The first stage was study of the membrane synthesis. The second stage was studies of membrane characteristics. Membrane synthesis was prepared by phase inversion method. Membrane characterization was determined by flux test with cross-flow method, mechanical properties, ion conductivity, morphological analysis by SEM, and filtered water analysis. Fluxes of polysulfone membrane doped TiO2 are similar. TiO2 doping resulted in positively effect at mechanical properties. Polysulfone membrane doped with 10% w/w TiO2 has resulted in the better mechanical properties. In term of resulting water filtration, polysulfone membrane doped TiO2 decreased the turbidity to level 2 NTU, and color of <5 TCU. The Polysulfone membrane decreased some parameters of water quality such as turbidity, color, mangan, nitrite, cuprum and iron.
Keyword: 

Judul: Prevalence of Bird Lice on Rock Pigeon (Columba livia) in 99Wonderland Park, Selangor, Malaysia
Abstrak: Rock Pigeon (Columba livia) have coexisted with humans for thousands of years and are used for various purposes such as food and in sports. Rock pigeons may have the potential to be infested with a wide range of ectoparasites, which can have a significant impact on their life cycle. This study aims to measure the prevalence of Columba livia with bird lice in 99Wonderland Park, Selangor, Malaysia in the year 2020 and to ascertain the impact of bird lice on the health of these infested birds. Data were collected from clinical records for the month of January to December in the year 2020 from 99Wonderland Park, Selangor, Malaysia. Lice were identified in 42 of the 80 Rock pigeons examined so, the overall prevalence of lice infestations was 52.5%. The prevalence of ectoparasites was found to be higher in young Rock pigeons (60.4%) as compared to adult Rock pigeons (37.4%). Columbicola columbae (wing lice) and Colpocephalum turbinatum (body lice) are two species of lice that have been detected. Body lice were more prevalent in young Columba livia birds at 47.6% whereas wing lice were more prevalent in adult Columba livia birds at 16.7%. Most of the lice were found in the thorax and abdomen area followed by the head and neck area., Merpati Batu (Columba livia) telah hidup berdampingan dengan manusia selama ribuan tahun dan digunakan untuk berbagai keperluan seperti makanan dan olahraga. Merpati batu dapat terinfestasi dengan berbagai ektoparasit, yang dapat berdampak signifikan pada siklus hidup mereka. Penelitian ini bertujuan untuk mengetahui prevalensi Columba livia dengan kutu burung di 99 Wonderland Park, Selangor, Malaysia pada tahun 2020 dan untuk memastikan dampaknya terhadap kesehatan burung yang terinfestasi. Data dikumpulkan dari catatan klinis dari bulan Januari hingga Desember tahun 2020 dari 99Wonderland Park, Selangor, Malaysia. Kutu diidentifikasi pada 42 dari 80 merpati batu yang diperiksa sehingga, prevalensi keseluruhan infestasi kutu adalah 52,5%. Prevalensi ektoparasit ditemukan lebih tinggi pada merpati batu muda (60,4%) dibandingkan dengan merpati batu dewasa (37,4%). Columbicola columbae (kutu sayap) dan Colpocephalum turbinatum (kutu badan) adalah dua spesies kutu yang telah ditemukan. Kutu badan lebih banyak ditemukan pada burung Columba livia muda sebesar 47,6% sedangkan kutu sayap lebih banyak ditemukan pada burung Columba livia dewasa sebesar 16,7%. Sebagian besar kutu ditemukan di daerah dada dan abdomen diikuti daerah kepala dan leher.
Keyword: Columba livia, prevalence, ectoparasite, wing lice, body lice, Columba livia, prevalensi, ektoparasit, kutu sayap, kutu badan