Judul: Pengaruh Jenis Kemasan dan Lama Penyimpanan terhadap Serangan Serangga dan Sifat Fisik Ransum Broiler Starter Berbentuk Crumble
Abstrak: Storage of feedstuff is required because development of farm must be made balance with availability of adequate feedstuff. Storage will influence physical properties of feedstuff. Packaging is the one of methods to take care product. Damage by environment can be controlled by packaging. This study was arranged in a Completely Randomize Design with factorial design (4x5) with four replications. The first factor was packaging type (guny sack, plastic sack, paper packaging, and plastic packaging). The second factor was storage (0, 2, 4, 6, 8 weeks). The parameters observed were: moisture content, water activity, particle size, specific density, bulk density, compacted bulk density, angle of repose and insect attack. Data were analyzed using analysis of variance (ANOVA) and differences between treatments were determined with Duncan test. The results showed that packaging type highly significantly affected (p<0.01) the moisture content, water activity, and compacted bulk density. Storage highly significantly affected (p<0.01) the moisture content, water activity, particle size, specific density, bulk density, compacted bulk density, and angle of repose. Insect attack was increase on guny sack, especially at four weeks of storage. Paper packaging and plastic packaging can take care feedstuff from insect attack until eight weeks, but plastic sack until four weeks, and guny sack until two weeks. Guny sack, plastic sack, paper packaging, and plastic packaging can take care physical properties of feedstuff until eight weeks. Keywords: feedstuff, packaging, physical properties, storage
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Judul: Pengaruh Lama Penyimpanan Ransum Komersial Ayam Broiler Starter Bentuk Crumble Terhadap Beberapa Sifat Fisik dan Kandungan Protein Kasar
Abstrak: Semakin besar suatu usaha petemakan, akan menyebabkan bertambahnya pula kebutuhan temak akan ransum yang memiliki kualitas dan nilai nutrisi yang baik, seliingga kebutuhan hidup pokok temak akan terpznuhi serta ciapat mencapai produksi yang diharapkan. Perkembangan usaha petemaka~p erlu diimbangi dengan ketersediaan ransum v.a nz memadai dan selalu s i a ~un tuk di-eu nakan sewsktu-waktu. Oleh sebab itu peutingnya penyimpanan sangat berkaitan dengan ketersediaan ransum. Penyimpanan merupakan suatu kegiatan untuk menahan maupun menunda penggunaan suatu bahan tanpi merubah bentik, kualitas dan nilai nutrGi dari baha~ie~r sebut, sampai saatnya digunakan. Penelitian ini bertujuan untuk mengetahui sifat fisik dan kandungan protein kasar ransum komersial ayam broiler starter bentuk crumble yang disimpan selama 12 minggu. Penelitian ini dilakukan pada bulan Juni hingga Agustus 2001, di Laboratorium Ilmu dan Teknologi Pakan, Jurusan Ilmu Nutrisi dan Makanan Temak, Fakultas Petemakan, Institut Pertanian Bogor. Materi yang digunakan adalah ransum komersial ayam broiler starter yang berbentuk crumble. Peubah yang diukur adalah berat jenis, kerapatan tumpukan, kerapatan pemadatan tumpukan, sudut tumpukan, kandungan protein kasar dan ketahanan benturan. Rancangan percobaan yang digunakan adalah Rancangan Acak Lengkap (RAL) dengan 3 ulangan dan terdiri dari 4 perlakuan, yaitu periode pengamatan (0, 4, 8, 12 n~inggu).D ata yang diperoleh dianalisis dengan analisa sidik ragam (ANOVA) dan apabila berbeda nyata dilanjutkan dengan uji jarak Duncan.
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Judul: Penggunaan Teorema Homeomorphy 2-Manifold dan Teorema Euler Poincare pada Torus 𝑇�� dan Simplicial Complex 𝐾��
Abstrak: Two dimensional topological spaces are said to be homeomorphic if they have the same topological invariant, where one of topological invariant used is an Euler characteristic. Homeomorphy 2-Manifold’s Theorem and Euler Poincare’s Theorem are used to distinguish two topological spaces. Homeomorphy 2-Manifold’s Theorem uses Euler characteristic to identify two dimensional topological spaces. Euler Poincare’s Theorem is an alternative way to find Euler characteristic with Betti number, which is topological invariant as well. The objective of this paper is to investigate the homeomorphism of torus 𝑇����� and simplicial complex 𝐾�����. Topological space torus and simplicial complex 𝐾����� have the same Euler characteristic, which is two. Based on Homeomorphy 2-Manifold’s Theorem topological space torus 𝑇����� and simplicial complex 𝐾����� is homeomorphic.
Keyword: simplicial, torus, Euler, homeomorphism, topology