Judul: Habitat Distribution of Yellowfin Tuna (Thunnus albacares) in Southern Waters of Java Using Maximum Entropy Model
Abstrak: Ikan tuna (Thunnus sp.) merupakan komoditas perikanan bernilai ekonomis penting dan menjadi komoditi ekspor Indonesia. Selama tahun 2018-2023, produksi perikanan tuna mengalami penurunan tiap tahunnya. Salah satu jenis tuna yang sering ditangkap di Perairan Selatan Jawa adalah tuna sirip kuning. Penelitian ini bertujuan menghitung produktivitas hasil tangkapan tuna sirip kuning, memetakan parameter oseanografi, serta memodelkan sebaran habitat ikan tuna sirip kuning menggunakan maximum entropy model. Data yang digunakan yaitu data logbook penangkapan dan data parameter oseanografi. Hasil penelitian menunjukkan nilai CPUE tuna sirip kuning sebesar 1.110,58
Keyword: oceanographic parameters, yellowfin tuna, southern waters of Java, CPUE, maximum entropy model

Judul: Pendugaan Daerah Penangkapan Ikan Tuna Sirip Kuning (Thunnus albacares) di Perairan Selatan Jawa-Bali
Abstrak: Permintaan tuna sirip kuning (Thunnus albacares) di Indonesia terus mengalami peningkatan setiap tahun. Untuk mengoptimalkan hasil tangkapan nelayan perlu dikembangkan peta daerah penangkapan ikan tuna sirip kuning di Indonesia. Tujuan dari penelitian ini adalah memetakan daerah yang potensial untuk menangkap ikan Tuna Sirip Kuning (Thunnus albacares) di perairan Selatan Jawa-Bali menggunakan metode Maximum Entropy (Maxent). Metode Maxent adalah memperkirakan ditribusi peluang entropy secara maksimum, dengan memperkirakan data yang paling banyak menyebar, saling berdekatan atau seragam. Data tangkapan ikan yang didapatkan dari logbook pelabuhan Cilacap dihitung laju tangkapnya (hook rate). Hasil prediksi daerah penangkapan ikan tuna sirip kuning (Thunnus albacares) memiliki beberapa perbedaan saat musim barat dan musim timur berdasarkan nilai SPL dan konsentrasi klorofil-a. Nilai laju pancing tertinggi adalah 0.53, terdapat pada bulan Juni 2016 dengan nilai SPL 28.57℃ dan konsentrasi klorofil-a 0.23 mg/m3. Nilai laju pancing terendah terdapat pada bulan Februari 2016 yaitu 0.17 pancing dengan nilai SPL 30.96℃ dan nilai konsentrasi klorofil-a sebesar 0.19 mg/m3. Peta prediksi daerah penangkapan ikan tuna sirip kuning di Selatan Jawa menyatakan bahwa potensi ikan tuna sirip kuning lebih optimal saat musim timur terutama wilayah Selatan Jawa bagian tengah dan bagian timur.
Keyword: Klorofil-a, Maxent, SPL, Tuna

Judul: Efforts to Control and Prevent Pathogenic Infection of Multi-Drug Resistant Organism (MDRO) of Methicillin-Resistant Staphylococcus aureus (MRSA) Clone Using Alcohol-Base Hand Rub.
Abstrak: The pandemic that is occurring caused both by COVID-19 (currently occurring) as well as the clone of the methicillin-resistant staphylococcus aureus (MRSA) in the previous period has really threatened human life. This condition requires materials that can break the chain of transmission from human to human and from the environment to human. An alcohol-based antiseptic (hand rub/hand sanitizer) often contains ethanol, isopropanol or n-propanol, or a combination of two of these types. Alcohol has an excellent germicidal activity in vitro against gram-positive and gram-negative vegetative bacteria (including multidrug-resistant pathogens such as MRSA and VRE) as well as viruses. Hand rub/hand sanitizer products are declared good if they have formulation stability, no irritation effect when they are used and are able to kill pathogens more than 90%. This study aimed to evaluate the quality of alcohol-based hand rub with WHO-based-standard formulation based on the stability of the formulation, the risk of irritation and the ability to kill bacteria. Hand rub/hand sanitizer was made by modifying the levels of the WHO formula with a hygiene procedure for 500 ml/bottle with the composition: Ethanol 96%; H2O2 3%; Glycerol 98%; and Aqua Sterile ad 500ml. Assessment on the presence of rancidity, clarity, discoloration, final alcohol content and skin irritation risk was done to know the quality of product formulation. A bacterial Methicillin-resistant staphylococcus aureus (MRSA) was used to assess the percentage of bacterial killing power. The selected bacteria were bacteria commonly found in the hospital environment. The results of formulation stability from four variants of level modification showed that MD.4 has good stability compared to other formulation modifications. The results of the percentage kill test against MRSA showed that the percentage kill is 99.90% at 1st, 2nd, and 5th minute. The selected manufacturer's product also showed the same percentage kill value at 1st, 2nd, and 5th minute. The results of percentage kill test showed that the effective value for each contact time is ≥ 90%. The SEM observations showed that MD.4 hand rub effect in the form of MRSA cell lysis. The LC50 test, it is known that MD.4 hand rub value is 620 ppm while softaman (control) is 114 ppm. In terms of irritation risk, twenty-three selected subjects were generally well tolerated in use.
Keyword: hand rub, hand sanitizer, ahmad Subhan, percentage kill bacteria, MRSA, WHO