Judul: Proteksi silang dari anti bisa ular calloselasma rhodostoma dan bungaros fasciatus terhadap dosis letal bisa ular calloselasma rhodostoma, Bungaros faciatus dan naja naja sputatrix
Abstrak: Penelitian ini bertujuan untuk mengetahui proteksi silang dari antibias ular Calioselasma rhodostoma dan Bungarus fasciatus terhadap dosis letal bisa ular Calloselasma rhosdostoma, Bungarus fasciatus dan Naja najasputatrix. Penelitian ini menggunakan tiga tahap percobaan yaitu (1) titrasi bisa ular untuk menentukan dosis letal (LD100) dari bisa ular Calloselasma rhodostoma, Bungarus fasciatus dan Naja naja sputatrix (2) titrasi serum anti bisa ular (SABU) untuk mengetahui nilai potensi SABU Calloselasma rhodostoma terhadap bisa ular Calloselasma rhodostoma dan SABU Bungarus fasciatus terhadap bisa ular Bungarus fasciatus, dan (3) uji proteksi silang dengan mereaksikan sejumlah tertentu SABU Calloselasma rhodostoma dan Bungarus fasciatus terhadap LD100 dari masing masing bisa ular. Hewan percobaan yang digunakan adalah mencit jantan galur A dengan berat badan pada saat pengujian adalah 15-17 gram. Hasil penelitian menunjukkan bahwa (1) tidak ada proteksi silang antara SABU Calloselasma rhodostoma dan Bungarus fasciatus terhadap dosis letal bisa ular Calloselasma rhodostoma, Bungarus faciatus dan Naja naja sputatrix (2) Bisa ular Bungarus fasciatus dan Naja naja sputatrix lebih toksik dari bisa ular Calloselasma rhodostoma…
Keyword: 

Judul: Karakterisasi Protein Bisa Ular Kobra Jawa (Naja Sputatrix) Setelah Perlakuan Penjemuran Dan Fotooksidasi
Abstrak: Bisa ular telah diketahui memiliki toksisitas yang menyebabkan kematian sekaligus merupakan sumber hayati yang penting sebagai obat untuk penyembuhan penyakit. Beberapa perlakuan dapat diberikan untuk menghilangkan toksisitas dalam bisa ular. Penelitian mengenai perlakuan penjemuran dan fotooksidasi untuk menurunkan efek toksik bisa ular Naja sputatrix belum dilakukan. Tujuan dari penelitian ini yaitu mengkarakterisasi kandungan protein dan aktivitas toksik pada bisa ular N. sputatrix setelah diberi perlakuan penjemuran dan fotooksidasi. Kadar protein pada bisa ular N. sputatrix yaitu 20.46% (b/v) yang meningkat setelah proses penjemuran, dan menurun setelah proses fotooksidasi. Bisa ular dipisahkan menjadi 5 pita protein utama dengan bobot molekul 14 hingga 108 kDa. Penjemuran selama 6 jam memiliki efek yang sama dengan perlakuan fotooksidasi yaitu menurunkan aktivitas LAAO sebesar 91% dan menghilangkan aktivitas antikoagulasi pada bisa ular, namun kedua perlakuan tersebut memiliki efek yang berbeda pada enzim PLA2 bisa ular. Penjemuran tersebut menurunkan 96% aktivitas PLA2 sedangkan fotooksidasi menghilangkan hampir seluruh aktivitas enzim tersebut (99.8%). Hasil ini menandakan bahwa penjemuran dan fotooksidasi dapat menurunkan aktivitas toksik dari bisa ular, namun tidak mempengaruhi karakter fisik dari kandungan proteinnya.
Keyword: asam L-amino oksidase, fotooksidasi, Naja sputatrix, bisa, fosfolipase A2

Judul: Model Pertumbuhan Ekonomi Perkotaan Berdasarkan Geografi Ekonomi
Abstrak: In economic activity, economic growth means increasing production of goods and services. Economic geography is economic system with respect to spatial dimension. Rapid economic development and structural changes such as rents, residential area, and transportation systems are indicators of progressivity of a country and its economics. A country is said to progress when the production rate of goods and services are increasing, then the volume of goods and services produced are also increasing from time to time. Neoclassical theory of economic growth depends on the increased the supply of factors of production and the rate of technological progress. The production factors are labor and capital. Domar in 1948 stated that production output is a function of capital. As a result, labor is always combined with capital on fixed proportion. Solow in 1956 added labour as one of the variables of production function. This study aims to examine the dynamics of urban growth model based on economic geography, i.e. study of the economic system based on the location and geographical conditions. The urban economic growth model considers the urban area to be divided into two areas, namely residential area and central business district. Urban area is assumed to have centralized workforce and multi sector economic system. The main economic activity in the central business district is production. On the other hand, consumption and saving activities are carried out in the residential area. More over people need to travel from residential area to the business district in their economic activities. This study will also examine the equilibrium solutions of the model and then give simulation on the model. The results of theoretical study show that the dynamic system of urban economic growth model is formulated in the form of linear system of first order differential equations. The variables which determine economic growth are the accumulation of capital and labor inputs. The equilibrium of these variables can be determined. Capital accumulation shows a pattern that follows an exponential function. Simulation study give the following results. The characteristics of urban economic growth are confirmed by the fact that when the elasticity of the urban industrial sector capital increases, then production output of the two sectors, both industrial and service sector, are increased. The industrial production increases sharply, while the service sector production output is relatively stagnant and then increased with a slower rate compared to the industrial sector. Increased elasticity of capital in industrial sector also tends to increase the income of urban residents, the labor wages, and the capital of both sectors. However, housing consumption tends to fall with increases in industrial sector capital elasticity. Furthermore, simulation results demonstrate the spatial and temporal changes in urban land rental values tend to decrease with increasing distance from the central business district and increasing time. Highest land rent is in a location that has the shortest distance to the central business district. The simulations also show increase in consumption following the increase in distance from the central business district. This suggests that the further away from the business district, the more people who rent or buy housing.
Keyword: