Judul: Kandungan Aflatoksin dan Analisis Titik Kritis pada Pengelolaan Pascapanen Jagung di Kabupaten Garut
Abstrak: Jagung merupakan bahan baku pakan utama dalam industri pakan maupun dalam penyusunan ransum pakan. Sampai saat ini industri pakan unggas masih berbasis corn-soya. Jagung mudah terkontaminasi aflatoksin, suatu metabolit sekunder dari cendawan Aspergillus flavus, A. parasiticus dan cendawan lainnya. Aflatoksin merupakan mikotoksin yang ditemukan pada tahun 1960, setelah terjadi kematian 100 000 ekor kalkun di Inggris, dan tingginya kejadian penyakit hati pada bebek di Kenya dan budidaya ikan trout di Amerika Serikat.
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Judul: Kandungan Aflatoksin dan Analisis Titik Kritis pada Pengelolaan Pascapanen Jagung di Kabupaten Garut
Abstrak: Corn is the major ingredients feedstuff. Feed ration in feedmill industry is based on corn-soya. Postharvested corn is susceptible to fungal invasion which able to produce fungal metabolites such as aflatoxin. The objectives of the research are (1) to get a description aflatoxin contamination in farmer, collecting sellers and whole sellers (2) to get a description of critical points an aflatoxin contamination (3) to get a correlation and regression between aflatoxin and moisture content, ash, organic matter, water activity both in corn kernel and corn meal. A total of 57 samples of corn which collected from farmers, collecting sellers and whole sellers in Garut regency have been investigated for the aflatoxin contamination and the critical points of its occurrence in postharvested corn. Sampling was done with purposive sampling method and aflatoxin content was detected by Enzyme Linked Imunosorbent Assay (ELISA). Other parameters were moisture content, ash, organic matter, water activity both in corn kernel and corn meal. The results showed that the highest contamination was found in whole sellers level. The critical points at farmers stage were due to spoilage corn from field unproper, shelling procedure and sun drying dependence . Critical points at collecting sellers stage were due to improper storage and sun drying dependence. Whereas critical point at whole seller stage was due to the improper mixing practice. Based on statistical analysis (SPSS 13.0), there was a positive correlation between percentage of damage kernels and aflatoxin content, coefficient correlation (r) = 0.552 in farmer level. In collecting sellers, between moisture content and aflatoxin content were negatively corelated with coefficient correlation (r) = -0.630 but organic matter and aflatoxin content were positively corelated with coefficient correlation (r) = 0.662. In whole sellers, there was no corelation which significan (alpha: 0.05) between aflatoxin and other parameter.
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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