Judul: Proses Pengolahan Asinan Salak Pondoh (Salacca edulis Reinw.)
Abstrak: Sallacca edulis Reinw. (pondoh snakefruit) is one of Indonesia’s tropical fruits commodities. It have character easily damage and short shelf life. However, the level of production snakefruits keeps increasing from year to year. Pickle as an alternative process for extend added value of salak. Water activity is important factor that influence shelf life of salak. The stage is determination the concentration of salt and pickle solution (sugar and vinegar). The results of chemical and physical analysis from the research showed the best concentration of salt and pickle solution is salt 12%, sugar 17%, and vinegar 3.5% with parameter the hardness is 18.25 mm/g.sec, vitamin C 0.0023 (mg/100 g), content of acid 0.015 (ml NaOH 0.1 N/100 g), value sensory of taste 4.026, dan water activity is 0.935. The value of water activity showed the formula not effective to prevent growth destroyed bacteri, yeast, and mold at salak pickle.
Keyword: shelf life, pickle, water activity

Judul: Kajian pelapisan dan suhu penyimpanan untuk mencegah busuk buah pada salak pondoh (Salacca edulis reinw.)
Abstrak: Snake fruit or salacca is a kind of perishable fruit. At room temperature, fresh salacca is only able to be stored less than 12 days. The mechanism of fruit rot during storage was influenced by mechanical, physiological and microbiological factors that result browning discoloration on the fruit flesh, wrinkled, dry and moldy. The aim of this research are: (1) to investigate the kinds of fruit rot on postharvest of salak pondoh; (2) to study the effect of coating of fruit and storage temperature on salak pondoh quality, and (3) to correlate the quality change of salak and mold growth during storage.The result of the research showed, the fungus occurred in fruit rot were mucor sp, aspergillus sp, fusarium sp and penicillium sp. Fresh fruit coating using aloevera and temperature treatment during storage had significant influence on quality changes including weight loss, flesh and skin water content, total soluble solid, firmness and sensory value. Due to prevention of fruit rot, Aloe vera coating was able to inhibit mold growth for 27 days during storage.
Keyword: 

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