Judul: Pendugaan Umur Simpan Tepung Lidah Buaya dengan Metode Kadar Air Kritis
Abstrak: Aloe vera is widely used in pharmaceutical and food industries. Aloe vera processing into Aloe vera powder is one of the utilization and preservation efforts of Aloe vera. The main objective of this research is to determine the shelf life of Aloe vera powder in the three types of plastic packaging, that are LDPE, OPP, and metalized plastic with acceleration method critical water content models. Critical quality parameter of Aloe vera powder was observed in this research is the change in texture, mainly caking. This research consists of two stages. First stage was the selection and training of panelists and the second stage was the determination of Aloe vera powder shelf life. Shelf life of Aloe vera powder in LDPE packaging with RH condition 75, 80, and 85 % respectively were 38, 33, and 29 days. In OPP packaging with RH condition 75, 80, and 85 % respectively were 255, 222, and 197 days. Meanwhile, in metalized plastic packaging with RH condition 75, 80, and 85 % respectively were 2095, 1828, and 1624 days. Packaging and RH condition are influential to prolong shelf life of Aloe vera powder. Metalized plastic, packaging with the smallest permeability, give the longer shelf life than the other packaging. But, based on economical factor and its shelf life factor, Aloe vera powder should be stored in OPP packaging in RH 75% which provides shelf life 255 days.
Keyword: 

Judul: Pemanfaatan Gel Lidah Buaya Sebagai Edible  Coating Untuk Memperpanjang Umur Simpan  Paprika (Capsicum Annum Varietas Sunny)
Abstrak: Edible coating is one of packaging technique to prolong shelf life of agricultural products, decrease quality degradation and weight loss. There are three items that can be used to make edible coating namely polysacharida, lipid and protein. One of agricultural product that can be used as an edible coating is aloe vera. Aloe vera gel consistss of polysacharida and another potential component that is capable to hamper fresh product from damage. Further more aloe vera gel is also able to take care of dampness by controlling water loss and exchange of dissolve components. One of agricultural products that was choosen for application is paprica. Paprica is one of horticulture product which is lately recognized by Indonesian. Indonesia was exporting paprica to several countries such as Taiwan and Singapore. In 2003, Indonesia exported paprica to Taiwan until 1.5 billion rupiahs with volume export as much 155.955 kilograms. Because of the level amount of export, we have to maintain the quality and paprica freshness so that it can be accepted by consumers. One of way to maintain the quality and paprica frehness is by coated paprica with aloe vera gel. The purpose of this study is to get aloe vera gel formula. This study consists of five steps which are physical and chemical analysis of Aloe vera, physical and chemical analysis of paprica, effect of CMC addition to Aloe vera gel viscosity during storage, effect of CMC addition to Aloe vera gel pH during storage and paprica coating by Aloe vera gel and quality degradation during srorage. This study was done by using three kinds of CMC concentration (0.5%, 1% and 1.5%) and immersed time (1 minute, 3 and 5 minutes). From the study is found that aloe vera gel is capable to prolong shelf life of paprica until 21 days. Increasing of weight loss, hardness and brightness level, soluble solid, acid total and vitamin C content occurred in paprica which was coated by aloe vera gel. The best condition of this study is paprica which was immersed during one minute in aloe vera gel with 1% CMC concentration. It had the smallest weight loss and hardness value compared with another conditions. Generally the result of organoleptic test in textur, colour and odor showed that paprica still can be accepted after 21 days storage.
Keyword: 

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. ,,,
Keyword: graf Hamilton, graf regular, graf lengkap, graf 2-connected 4-regular.