Judul: Assesment of quality changes of edible coated minimally processed fruits (Pondoh salak and Arumanis mango) during storage
Abstrak: Preferensi permintaan masyarakat terhadap kuantitas, kualitas dan penampilan buah-buahan menbgkat sejalan dengan semakin meningkatnya kesadaran akan pentingnya buah-buahan sebagai pelengkap gizi dan semakin terbatasnya waktu yang tersedia di luar urusan kinerja akibat berbagai faktor. Kondisi ini memberi peluang untuk dipasarkannya buah terolah minimal yang terkesan lebih praktis. Buah terolah minimal bersifat mudah rusak baik selama penanganan maupun selama penyimpanan. Salah satu alternatif yang diharapkan dapat menekan laju penurunan mutu dan memperpanjang umur simpan buah terolah minimal adalah melapisinya dengan suatu film yang dapat dimakan dikombinasikan dengan penyimpanan pada suhu rendah.
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Judul: Aplikasi Edible Coating Lidah Buaya dan Suhu Penyimpanan untuk Menjaga Mutu Salak Pondoh (Salacca edulis Reinw.) Terolah Minimal.
Abstrak: Application of edible coating and storage temperature are common to maintain fruit’s quality. A source that can be used as edible coating is aloe vera which contains antimicrobial substance. Unfortunately extra effort is needed to prepare aloe vera to be edible coating (peeling, crushing, and filtering) that causes difficulties in application. Formulation of aloe vera edible coating in powder form could ease the application. This research aimed to know the effect of spray drying process on aloe vera edible coating characteristics and its effectiveness to maintain minimally processed salak pondoh. Furtheremore, this research aimed to get information about the effect of aloe vera edible coating and storage temperature on minimally processed salak pondoh (Salacca edulis Reinw.). Fruits quality parameters in this research were firmness, weight loss, percentage of damage, and visual changes. Statistical analysis used was Completely Randomized Design with twice replications. The result showed that spray drying process decreased aloe vera edible coating viscosity, total soluble solid (TSS), and titratable acidity, while its pH value increased. Aloe vera edible coating color changed to be yellowish from smooth green. Furtheremore storage temperature gave significant (α=0.01) effect on all parameters, while aloe vera edible coating did not give significant effect on all parameters analyzed, but uncoated fruits were contaminated by molds sooner than coated ones.
Keyword: Edible coating, aloe vera, polysaccharides, minimally processed fruit, spray dry

Judul: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
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