Judul: Karakterisasi Sifat Adsorpsi Surfaktan Metil Ester Sulfonat (MES) dan Surfaktan Sodium Dodesil Sulfat (SDS) pada Core Sintetik
Abstrak: Adsorption of surfactants on the synthetic core is one of the methods for optimizing the production of petroleum. This study aimed to assess the characteristics of surfactant adsorption, methyl ester sulfonate (MES) and sodium dodecyl sulfate (SDS), on the synthetic core. The results of dimensional measurements, synthetic core had an average porosity of 30-35%, and average permeability 45,9-50,4 mD. Based on the result of treatment on the effect of synthetic core weight to the surfactant adsorption concentration, it shown that saturation point with highest MES surfactant concentration difference in dilution and core occured on treatment of 4 g/ml synthetic core with 7.16 mg/g value (on 80 times dilution) and 3.5 g/ml with 7.18 mg/g value (on 100 times dilution). On SDS sufactant, it shown the synthetic core weight treatment of 2.5 g /ml (on 50 and 100 times dilution) is the saturation point of SDS surfactant adsorption On the treatment of MES concentration variety level to the concentration of MES surfactant adsorption, the result shown the higher MES concentration which was used gave higher surfactant adsorption level on synthetic core of 0.4% MES concentration reached saturation point. On SDS sufactant, based on the effect of SDS concentration variety level to the concentration of SDS surfactant adsorption, the results shown of 0.3% at the saturation pointthe surfactant SDS adsorbed to the synthetic core Results of analysis of the characteristics of pH show a rise of pH in MES and SDS surfactant after adsorption test on treatment in differences weight of core synthetic and surfactant concentration. The results of color analysis after adsorption of the surfactant in the treatment in differences weight of core synthetic and surfactant concentratios showed the decreasing Klett value.
Keyword: 

Judul: Preparation and Characterization Methyl Ester Sulfonate (MES) from Olein Methyl Ester.
Abstrak: Peningkatan nilai tambah minyak sawit selain menjadi metil ester oleat juga dapat melalui pembentukan metil ester sulfonat (surfaktan). Surfaktan merupakan zat aktif permukaan yang dapat menurunkan tegangan antarmuka antara dua bahan baik berupa cairan-cairan, cairan-padatan, atau cairan-gas. Metil ester sulfonat (MES) adalah salah satu jenis surfaktan anionik, muatan negatif pada gugus hidrofiliknya bersifat aktif permukaan. MES dibuat melalui proses sulfonasi menggunakan gas SO3 dalam reaktor film turun tabung tunggal (STFR), yang dilakukan pada suhu 80 °C dengan selang waktu 60 sampai 360 menit. Hasil penelitian menunjukkan lama proses 360 menit dengan netralisasi merupakan perlakuan terbaik dengan nilai tegangan antarmuka sebesar 7.7 × 10-3 dyne/cm, rerata kandungan bahan aktif dan bilangan asam sebesar 10.8770% dan 0.1889 mg KOH/g MES, bilangan iodin 27.4687 mg I2/g MES, densitas 0.98619 g/mL.
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