Judul: Evaluasi Stabilitas Aktivitas Enzim Selulase Cairan Rumen Domba
Abstrak: Developing Indonesian fishery sector needs solution in handling feed ingredients. An effort that has been carried out is the use of rumen fluid to lower crude fiber content of feed ingredients. Previous reasearch showed activities of several enzymes in sheep rumen fluid. The enzyme activity values were cellulase (0.015 ± 0.31), amylase (0.14 ± 0.016), protease (0.11 ± 0.016), and lipase (0.03 ± 0.011) IU/mL, respectively. The cellulase enzyme activity will degrade fibers which are difficult to digest to become easily digested by the fish. Optimum pH and storage time has to be known to make efficient the use of rumen fluid to degrade fibers in feed ingredients.The study was conducted at incubation temperature of 30 °C with the pH of 5.0, 6.0, 7.0, 8.0, and 9.0 as well as the storage time of 1, 2, 3, and 4 weeks. The results showed that the cellulase enzyme activity of sheep rumen fluid was optimum at pH 8.0, that is 0.00149 IU/mL. Stability of the enzyme activity was obtained at pH 8.0 with storage time for 4 weeks.
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Judul: Sintesis Protein Mikroba dan Aktivitas Enzim Selulase Rumen Sapi Nama NIM Bali In Vitro dengan Penambahan Sabun Kalsium-Minyak Kedelai
Abstrak: Soybean oil-calcium soap is soap-protected soybean oil as a source of polyunsaturated fatty acids. Provision of soybean oil-calcium soap can removes negative effects of unsaturated fatty acids on rumen microbes and optimize rumen fermentation. The research was aimed to study the effect of soybean oil calcium soap on ammonia concentration, microbial protein synthesis and the activity of cellulase enzymes in vitro. The experiment was designed in completely randomized block design (RBD) with 3 treatments and 4 block based on time rumen sampling. The treatments were control diet (C), C + 5% soybean oil (M), and C + calcium-soap of 5% soybean oil (S). The results showed that supplementation of calcium-soap soybean oil at level 5% did not significantly affect the pH value, NH3 concentration and microbial protein synthesis. Mean while it could increase the activity of cellulase enzyme.
Keyword: Bogor Agricultural University (IPB), rumen microbial protein synthesis, soybean oil, calcium soap

Judul: Graphology Analysis Based on Letter a and t Using Perceptron.
Abstrak: Graphology or handwriting analysis is a method of identifying, analyzing, evaluating, and understanding personality through the strokes and patterns revealed by handwriting. A person who can analyze handwriting is called a graphologist. A graphologists can be subjective in their assesments different graphologist can have different analysis of the same handwriting. Therefore, a computer technology may help to minimize the subjectivity. This research used perceptron to analyze personality based on handwriting. Perceptron is one method of neural network. This research analyze two letters to letter a and t image. Letter a are represented by 135 images, consisting of 81 images as training data and 54 images as testing data. There are 150 images used for t images, consisting of 90 images as training data and 60 images as testing data.There are 5 experiments consisting of 2 experiments for letter a and 3 experiments for letter t. The result is the character of each class letter a and t where each parameters there are 3 classes. The accuracy of letter t and letter a was 55% and 88.89% respectively.
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