Judul: Kandungan Asam Fitat dan Kualitas  Dedak Padi yang Disimpan dalam Keadaan Anaerob.
Abstrak: The aim of this research was to study the physical characteristics, dry matter digestibility (DMD), organic matter digestibility (OMD) , and the occurance of the fungi as well as the content of phytic acid in rice bran stored in the anaerobic condition. The experiment was carried out using a Factorial randomized completely design with 2 factors and 3 replication. Factor A consisted of P1 = Rice bran without treatment (control), P2 = Silage of rice bran without additive, P3 = Silage of rice bran with additive and P4 = Silage of rice bran dried. Factor B consisted of time of storage i.e : 0 weeks, 6 weeks and 12 weeks. The variables observed in this experiment were the organoleptic characteristics (the physical characteristics of rice bran), the phytic acid, DMD, OMD, and the occurance of insects. The data were analyzed using analysis of variance (ANOVA) and differences among treatments were tested by orthogonal contrast test (Steel and Torrie, 1993). The results showed that the treatments of fermentation and time of storage were significantly (P<0.01) decreased the phytic acid from 6.7% until 2.07% and increased the DMD and OMD value. There were interaction between time of storage and the treatmens on the content of phytic acid and DMD, but it was not happened in the DMO value. The phytic acid content was the lowest in the treatment P2 stored during 12 weeks. The DMD value in P2 and P3 were higher (P<0.01) than those of P1 and P4 (P<0.01). It is concluded that the quality withstanded phytic acid decreased and digestibility increased when rice bran was stored under anaerobic condition.
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Judul: Impact of Storage Time, Packaging Type and Calcium Propionate Application on Moisture Content and Quality of Physical Properties of Rice Bran
Abstrak: Dedak padi merupakan salah satu bahan pakan yang dapat digunakan pada berbagai jenis ternak dengan ketersediaan cukup tinggi di Indonesia. Selain ketersediaannya melimpah namun dedak padi memiliki daya simpan rendah. Berdasarkan latar belakang tersebut penelitian ini bertujuan untuk mempertahankan kualitas dedak padi selama penyimpanan dengan penggunaan kemasan hermetik (kedap udara) dan pemberian bahan pengawet (kalsium propionat). Penelitian ini menggunakan Rancangan Acak Lengkap (RAL) faktorial (3 x 4) dengan 4 ulangan, yang terdiri dari faktor waktu penyimpanan (0, 30, dan 60) hari dan faktor jenis kemasan + penambahan bahan pengawet (karung goni + 0 ppm kalsium propionat (P1), karung goni + 160 ppm kalsium propionat (P2), karung hermetik + 0 ppm kalsium propionat (P3) dan karung hermetik + 160 ppm kalsium propionat (P4)). Peubah yang diamati yaitu kadar air, kerapatan tumpukan, kerapatan pemadatan tumpukan dan berat jenis. Data yang diperoleh dari hasil penelitian dianalisis menggunakan analisis ragam ANOVA (Analysis of Variance) dan bila terjadi perbedaan yang signifikan dilanjutkan dengan uji Duncan menggunakan software SPSS Hasil penelitian menunjukan bahwa perbedaan waktu penyimpanan, jenis kemasan dan interaksi nyata (p<0.05) mempengaruhi kadar air dan nilai sifat fisik dedak padi. selama penyimpanan kadar air meningkat dan terjadi penurunan nilai kerapatan tumpukan, kerapatan pemadatan tumpukan dan berat jenis serta terjadi peningkatan pada jumlah serangan serangga. Jenis kemasan karung goni dengan dan tidak ditambah kalsium propionat nyata (p<0.05) lebih kecil nilai sifat fisiknya dan kandungan kadar air lebih tinggi dibanding karung hermetik selama penyimpanan (0, 30 dan 60) hari. Dapat disimpulkan bahwa penggunaan karung hermetik dan penambahan kalsium propionat pada dedak padi dapat mempertahankan kualitas dedak padi selama penyimpanan kurang dari 60 hari., Rice bran is a feed ingredient that is commonly used in animal husbandry and is widely available in Indonesia. In addition to the plentiful availability, rice bran has a low shelf life. Based on this background, this study aims to maintain the quality of rice bran during storage by using hermetic packaging (anti air) and adding preservatives (calcium propionate). This study used a Factorial Completely Randomized Design (CRD) (3 x 4) with 4 replications, that consisted of factor storage time (0, 30, and 60) days and factor type packaging + addition of preservatives (burlap sacks + 0 ppm calcium propionate (P1), burlap sack + 160 ppm calcium propionate (P2), hermetic bag + 0 ppm calcium propionate (P3) and hermetic bag + 160 ppm calcium propionate (P4)). The variables observed were moisture content, bulk density, tapped density and true density. The data obtained from the research results were analyzed using ANOVA (Analysis of Variance) and if there was a significant difference followed by the Duncan used software SPSS. The results showed that differences in storage time, type of packaging and treatment interaction had a significant effect (p<0,05) on moisture content and physical properties of rice bran. During storage the moisture content increased and there was a decrease of bulk density, tapped compaction density and true density and increase of insect attaction. The packaging type of burlap sack with and without added calcium propionate (p<0,05) had lower physical properties and contained higher moisture content than hermetic sacks during
Keyword: dedak, hermetik, kalsium propionat, karung goni, sifat fisik, calcium propionate, rice bran, burlap sack, hermetic, phisycal propeties

Judul: Cycle Hamilton pada Graf Lengkap, Graf Regular, dan Graf 2-Connected 4-Regular Berorder Kurang dari Sepuluh
Abstrak: Suatu graf disebut graf Hamilton apabila graf tersebut memuat cycle Hamilton, yaitu cycle yang melewati setiap vertex tepat satu kali. Menentukan keberadaan cycle Hamilton pada suatu graf dapat menggunakan syarat cukup yang berupa teorema-teorema yang telah diperkenalkan sejak tahun 1950-an. Beberapa syarat cukup yang dibahas dalam karya ilmiah ini adalah syarat cukup yang berhubungan dengan graf lengkap dan graf regular. Suatu graf lengkap berorder 𝑛������ ≥ 3 dan graf r-regular berorder 𝑛������ ≤ 2𝑟������ + 1 merupakan graf Hamilton, Karena kedua graf tersebut memuat cycle Hamilton. Selanjutnya, syarat cukup tersebut digunakan untuk menentukan keberadaan cycle Hamilton pada graf 2-connected 4- regular berorder kurang dari 10.
Keyword: graf Hamilton, graf regular, graf lengkap, graf 2-connected 4-regular