Hasil Pencarian  ::  Simpan CSV :: Kembali

"Banteng (Bos javanicus d?Alton) is naturally distributed throughout Asia. In Indonesia this species can be found in Jawa, Bali, and Kalimantan. The current population is small, making it categorized as an endangered species. Protection measures have been implemented in such national parks as in West Bali, Ujung Kulon, Baluran, and Alas Purwo. Scientifically, this species is a genetic resource potential for further domestication purposes. In fact this species has been traditionally utilized as a cross-breeder for Bali Cattle which originated from Bos sondaicus. Banteng is typically a crespuscular species, but due to disturbances it sometimes becomes nocturnal. The species generally live in groups of 5 to 15 individuals, with only 2 to 3 steers in a group, although groups with only one steer is not unusual. The groups spend most ,of their time grazing in a pasture. Alas Purwo is a national park located in Sothern Banyuwangi, East Jawa, and initially gazetted as an area for animal protection. The total area of this national park is about 43420 hectares, but the Banteng is usually found grazing in Sadengan a pasture area with a size of about 20 hectares. This thesis consists of two papers, i.e.,Daily behaviour of banteng, and Habitat selection for feeding. Samples of banteng have been taken directly, using the concentrated method, whereas the grass samples have been taken by using quadrates of 100 x 100 cm2, totalling 100 plots. Observations have been carried out in two locations, i.e., location I: around the tower, and location II: nearby and adjacent to the mountaineous area. The studies have been conducted from January 1996 to June 1996. The paper entitled Daily behaviour of bantengs concluded that (1). The environment significantly affected the daily behaviour of the cows.(2). Frequency of cows in pasture areas of Sadengan in Alas Purwo broken as if indicator of disturbance. It is recommended that to increase grazing intensity of cows, habitat management should be maintained properly, particularly monitoring of wild dogs. The paper entitled Habitat selection for feeding, concluded : (1). Potential of grasses in pastures of Sadengan in Alas Purwo National Park was very low, (2)Location of grazing areas was concentrated in one location, and was related to the biomass of grasses as their food resource. It is recommended that (1). Pasture areas of Sadengan in Alas Purwo National Park should be properly maintained, and (2). Grasses of Hyptis brevipes Porr. and Cassia Lora L. should be cut prior to flowering."

"Multinulear comlexes have received considerable interest as moleculer magnet materials...."

"Kandungan karbon dioksida di atmosfer terus meningkat setiap tahunnya dan mencapai kandungan tertinggi pada pada Juni tahun 2024 sebesar 426,91 ppm. Teknologi penangkapan karbon dioksida saat ini seperti menggunakan larutan alkali dan aminebased absorption memiliki kemampuan menangkap karbon dioksida yang bagus. Akan tetapi, teknologi saat ini membutuhkan biaya yang mahal. Oleh karena itu, metode pemisahan dengan adsorpsi menawarkan solusi pemisahan karbon dioksida dari flue gas yang energi efisien dan ramah lingkungan. Salah satunya adalah menggunakan kerangka logam - organik yang menunjukkan potensi yang sangat bagus karena kapasitas adsorpsi, selektivitas, dan penyesuaian pori yang bebas. Zn-ox-mtz (Zn2(ox)(mtz)2, Zn2C8H8N6O4) merupakan MOF yang menggunakan ligand mtz yang hemat biaya dan asam oksalat. MOF Zn menunjukkan kemampuan adsorpsi CO2 yang sangat bagus, kapasitas CO2 yang tinggi (58,0 STP cm3 g-1 pada 15 kPa), dan selektivitas CO2 /N2 (15/85, S > 106) yang sangat baik. Dalam penelitian ini, pemodelan adsorpsi dan difusi dilakukan untuk mendapatkan parameter simulasi yang sesuai dengan eksperimen, selektivitas adsorpsi, dan selektivitas difusi. Berdasarkan simulasi, parameter force field yang sesuai, yaitu UFF4MOF untuk membran Zn-ox-mtz dan TraPPe untuk gas karbon dioksida dan nitrogen. Serta, muatan (charge) yang sesuai untuk simulasi adalah DDEC6. Kerangka logam-organik Zn-ox-mtz menunjukkan selektivitas adsorpsi CO₂/N₂ yang meningkat dengan tekanan pada 298 K, dari 886,0 pada 15 kPa hingga 1884,5 pada 100 kPa. Selektivitas difusi N₂/CO₂ menurun seiring kenaikan suhu, yaitu 3,947; 3,299; dan 2,622 pada 298, 323, dan 373 K. Penurunan ini terjadi karena laju difusi CO₂ meningkat lebih tajam dibandingkan N₂. Energi aktivasi difusi CO₂ dan N₂ masing-masing adalah 15,05 kJ/mol dan 10,06 kJ/mol. Hasil ini menunjukkan bahwa Zn-ox-mtz berpotensi tinggi untuk aplikasi pemisahan CO₂, baik melalui mekanisme adsorpsi maupun difusi.

---

The carbon dioxide content in the atmosphere continues to increase every year and reached its highest content in June 2024 at 426.91 ppm. Current carbon dioxide capture technologies such as using alkali solutions and amine-based absorption have good carbon dioxide capture capabilities. However, current technologies are expensive. Therefore, the separation method by adsorption offers a solution for separating carbon dioxide from flue gas that is energy efficient and environmentally friendly. One of them is using a metal-organic framework that shows very good potential due to its adsorption capacity, selectivity, and free pore adjustment. Zn-ox-mtz (Zn2(ox)(mtz)2, Zn2C8H8N6O4) is a MOF that uses cost-effective mtz ligands and oxalic acid. The Zn MOF shows excellent CO2 adsorption capability, high CO2 capacity (58.0 STP cm3 g-1 at 15 kPa), and excellent CO2/N2 selectivity (15/85, S> 106). In this study, adsorption and diffusion modeling were performed to obtain simulation parameters that were in accordance with the experiment, adsorption selectivity, and diffusion selectivity. Based on the simulation, the appropriate force field parameters were UFF4MOF for the Zn-ox-mtz membrane and TraPPe for carbon dioxide and nitrogen gases. Also, the appropriate charge for the simulation was DDEC6. The Zn-ox-mtz metal-organic framework showed CO₂/N₂ adsorption selectivity that increased with pressure at 298 K, from 886.0 at 15 kPa to 1884.5 at 100 kPa. The N₂/CO₂ diffusion selectivity decreased with increasing temperature, namely 3.947; 3.299; and 2.622 at 298, 323, and 373 K. This decrease occurred because the CO₂ diffusion rate increased more sharply than N₂. The activation energy of CO₂ and N₂ diffusion is 15.05 kJ/mol and 10.06 kJ/mol, respectively. These results indicate that Zn-ox-mtz has high potential for CO₂ separation applications, both through adsorption and diffusion mechanisms."