Judul: Simulasi distribusi suhu dan kelembapan udara untuk pengembangan desain rumah tanaman di daerah tropika basah
Abstrak: Greenhouse design for the humid tropical regions is still a challenge. Microclimate analysis of a standard peak type greenhouse has been conducted using Computational Fluid Dynamics (CFD). The objectives of this research were to simulate temperature, humidity, and airflow distribution by using CFD, and to investigate the greenhouse natural ventilation performance on zero and low windspeed conditions. Climate data and greenhouse characteristics were used as inputs for the simulation. The CFD model predicted temperature, relative humidity, and airflow distributions inside the greenhouse. Visual representations of the three parameters distributions in the greenhouse were created by isothermal line. The simulation produced realistic approximations of the dynamic behavior of greenhouse environments. Results of this study showed the importance of roof vents and sidewalls openings for efficient thermally driven ventilation
Keyword: 

Judul: Simulasi Sebaran Suhu Udara dan Permukaan Lantai Rumah Tanaman dengan Menggunakan Computational Fluid Dynamics (Cfd)
Abstrak: Temperature is one of important factors in plant growing. Distribution of temperature that occurs in the greenhouse should be used as the basic consideration for designing a greenhouse. Floor is one of important governing factors that affect temperature distribution. The air and surface temperature distribution on the floor greenhouse can be simulated by using Computational Fluid Dynamics (CFD). The simulation was applied to a naturally ventilated standard peak greenhouse. Measured floor surface temperature were 26.3–47.7 oC and air temperature at 45 cm above the floor surface were 23.5–39.2 oC. Simulated floor surface temperature were 26.41–39.89 oC and air temperature at 45 cm above the floor surface were 25.43–36.40 oC. Validation of the model had been done by calculating accuration and linear regression analysis. The simulation showed the accuracy 91.18-99.66% at the minimum solar radiation (0 W/m2) and 90.79-99.92% at maximum solar radiation (1,092 W/m2), and resulting a high value of coefficient of determination (0.946-0.947). Results show that the model performed well in simulating the air and surface temperature distribution on the floor of greenhouse, as compared to that of the measured value. It also show that CFD could be used to predict convective heat transfer and airflow pattern on the floor of greenhouse, accurately.
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