Judul: Study Quality of Several Local Nylon Bags Through In Sacco Corn Degradation Analysis
Abstrak: Pengukuran kecernaan pada metode in sacco dengan menggunakan sapi fistula rumen memerlukan kantong berbahan nilon. Penggunaan kantong nilon standar yang diimpor dari Amerika (Ankom) ternilai mahal, sehingga diperlukan mengidentifikasi kantong nilon lokal yang dapat menggantikannya. Penelitian ini bertujuan menganalisis kualitas beberapa kantong nilon yang dibuat dari kain nilon lokal melalui pengukuran degradasi bahan kering dan bahan organik (DBK dan DBO) konsentrat yang diwakili oleh jagung di dalam fistula rumen dua ekor sapi Frisian Holstein. Rancangan acak kelompok digunakan dengan perlakuan berupa 5 jenis kantong nilon lokal yaitu, Abutai, Tafetta, Organza, N57, dan M100 dengan pembanding kantong nilon Ankom. Waktu inkubasi di dalam rumen selama 0, 2, 4, 8, 16, dan 24 jam. Hasil penelitian menunjukkan bahwa DBK dan DBO jagung nyata dipengaruhi oleh jenis kantong yang digunakan. Degradasi jagung semakin meningkat seiring dengan lamanya inkubasi. Degradasi jagung menggunakan kantong nilon Tafetta, Organza dan M100 mendekati degradasi jagung dengan menggunakan kantong Ankom. Dari penelitian ini dapat disimpulkan bahwa kantong nilon Tafetta, Organza, dan M100 dapat digunakan sebagai pengganti penggunaan kantong nilon Ankom untuk pengujian degradasi jagung pada in sacco., Nylon bag is needed to measure digestibility in the in sacco method. The use of standard nylon bags were imported from America (Ankom) is expensive, so it is necessary to identify local nylon bags. This study aimed to analyze the quality of several nylon bags made from local nylon fabric by the degradation of dry matter and organic matter (DMD and OMD) concentrates represented by corn in the rumen fistula of two Frisian Holstein. A randomized block design was used with treatment in the form of 5 types of local nylon bags, namely, Abutai, Tafetta, Organza, N57, and M100 with Ankom nylon bags as comparison. Incubation time in the rumen for 0, 2, 4, 8,16, and 24 hours. The results showed that DMD and OMD corn were significantly influenced by the type of bag. Corn degradation increased with the length of incubation. Corn degradation using Tafetta, Organza and M100 nylon bags was close to maize degradation using Ankom bags. Based on the corn degradation test, it was concluded that Tafetta, Organza, and M100 nylon bags could be used instead of Ankom nylon bags for in sacco.
Keyword: Ankom, concentrate, degradation, in sacco, nylon bag

Judul: The Effect of Bag Porosity on Forage Degradation In Sacco
Abstrak: Pengukuran degradasi suatu bahan pakan di dalam rumen sapi berfistula atau in sacco merupakan suatu metode pendugaan kecernaan menggunakan kantong nilon. Hingga saat ini, kantong nilon yang digunakan masih impor dan mahal. Penelitian ini bertujuan mengidentifikasi bahan kain nilon di Indonesia (lokal) yang dapat digunakan sebagai bahan kantong pengganti kantong nilon impor. Sebanyak 5 jenis kantong nilon lokal (Taffeta, Abutai, N57, M100 dan Organza) dengan pembanding kantong nilon impor (Ankom), diukur porositas untuk mengukur degradasi bahan kering (DBK) dan degradasi bahan organik (DBO) rumput gajah dengan waktu inkubasi 0, 3, 6, 12, 24, 48 dan 72 jam di dalam rumen sapi perah berfistula. Penelitian ini menggunakan rancangan acak kelompok dengan menggunakan 4 frekuensi inkubasi di dalam rumen sebagai kelompok. Hasil penelitian menunjukkan bahwa porositas dan degradasi antar kantong berbeda nyata. Taffeta dan Abutai memiliki porositas, degradasi, dan laju rumput gajah yang terdegradasi baik DBK maupun DBO mendekati Ankom. Dari penelitian ini dapat disimpulkan bahwa kantong nilon produk lokal Taffeta dan Abutai dapat digunakan sebagai pengganti kantong nilon impor (Ankom) dalam penelitian in sacco., Measuring the degradation of a feed ingredient in the rumen of fistulous cattle or in sacco is a method of predicting digestibility using nylon bags. Until now, the nylon bags used are still imported and expensive. This study aims to identify nylon fabrics in Indonesia (locally) that can be used as a substitute for imported. nylon bags by measuring the porosity and degradation of elephant grass. A total of 5 types of local nylon bags (Taffeta, Abutai, N57, M100 and Organza) with comparison of imported nylon bags (Ankom), their porosity was measured to measure dry matter degradation (DMD) and organic matter degradation (OMD) of elephant grass with time incubation 0, 3, 6, 12, 24, 48 and 72 hours in the rumen of a fistulous dairy cow. This study used a randomized block design using 4 incubation frequencies in the rumen as a group. The results showed that the porosity and degradation between bags were significantly different. Taffeta and Abutai have porosity, degradation and the rate of degraded elephant grass both DMD and OMD similar Ankom. From this research, it can be concluded that the nylon bag import (Ankom) has been used for research, can be used to replace the nylon bags local brand Taffeta and Abutai.
Keyword: Ankom, feed degradation, in sacco, porosity, rumen fistulous

Judul: Pengaruh vaksinasi terhadap dinamika populasi pada model SIR (Susceptible-Infected-Recovered)
Abstrak: SIR model can be used to model the spread of diseases in a closed population based on certain assumptions. In this research, the SIR model is formulated by including the factor of vaccination. As the result, the model has been shown to have two equilibrium points, i.e. disease free and endemic equilibrium. A simulation study is carried out to illustrate the model. The results show that some equilibrium points are asymptotically stable. Moreover, a minimum level of vaccination has been defined. For the vaccination level less than the minimum level, increase in the vaccination level results in decrease of the proportion of infected individuals in the corresponding equilibrium point. On the other hand, for the vaccination level greater than the minimum level, increase in the vaccination level results in decrease the proportion of susceptible individuals in the corresponding equilibrium point. Furthermore, when vaccination level is greater than the minimum level, it is found that the time needed for the disease to extinct is shorter.
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