Judul: Optimasi Proses Ekstraksi Antosianin Bunga Teleng (Clitoria ternatea L.) dengan Metode Permukaan Tanggap
Abstrak: The Box-Behnken experimental design with Response Surface Methodology has been used in optimation of extraction process of anthocyanin from butterfly pea (Clitoria ternatea L.) petal. The extraction process was conducted with no light by using water. The ratio of fresh petal to water-HCl (pH 4.5) was 1:4 (w/v). The optimum process was defined as a set of extraction factors by using highest extract volume, anthocyanin and total phenol content as the selected parameters. The three factors were blanching time (0 to 12 minutes), extraction temperature (30 to 60oC) and extraction time (30 to 120 minutes). The research showed that all factors had significant effect to volume by following reduced 2-factor interaction model, while anthocyanin content and total phenol content was effected by following reduced quadratic model. Based on the models, the most efficient extraction process was 6 minutes for blanching time followed by 30 minutes of extraction time at 60oC. The antioxidant activity and stability during storage of the extract was also studied. The research showed that highest antioxidant activity of butterfly pea flower extract was reached at pH 1 (flavylium cation) followed by pH 4.5 (hemiketal form) and pH 7 (quinonoidal base). The study of stability showed that butterfly pea extract was very unstable at pH 12 to 14, both in room temperature and 4oC storage. The extracts with pH 1 to 11 at 4oC were much more stable compare to the room temperature. At room temperature, the highest stability showed by pH 1 and followed by pH 2. At 4oC the extracts with pH 1 to 2 and 7 to 11 were stable during 28 days storage.
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Judul: Effect of Packaging and Temperature as well as Storage Stability Test of Antioxidant Microencapsulated Butterfly Pea Flower (Clitoria ternatea L.)
Abstrak: Bunga telang (Clitoria ternatea L.) mengandung senyawa antioksidan berupa antosianin yang banyak dimanfaatkan sebagai bahan pewarna. Penelitian ini bertujuan mengetahui pengaruh kemasan, suhu dan interaksinya terhadap mikroenkapsulat bunga telang serta mengidentifikasi stabilitas penyimpanan antioksidan mikroenkapsulat bunga telang. Jenis kemasan yang digunakan ialah plastik polipropilen dan aluminium foil dengan suhu yang digunakan ialah suhu ruang (28℃) dan suhu dingin (7℃) yang dilanjutkan dengan penyimpanan bubuk bunga telang pada 0 hari sebagai kontrol, 3 hari, 5 hari, 10 hari dan 15 hari. Respon yang diukur adalah aktivitas antioksidan (%). Kombinasi yang dipilih ialah kemasan aluminium foil dengan penyimpanan suhu dingin (7℃). Ke empat perlakuan memiliki nilai IC50 yang berbeda dengan nilai IC50 terendah pada perlakuan D-Alu sebesar 490,10 ppm. Nilai IC50 pada ke-5 titik penyimpanan berbeda nyata pada taraf signifikansi 5%, dengan nilai IC50 terendah pada hari ke- 0 sebesar 418,80 ppm. Kadar air bubuk telang sebesar 7,08% yang mana sesuai kriteria rempah bubuk SNI., Butterfly pea (Clitoria ternatea L.) flower contains antioxidant compounds in the form of anthocyanins which are widely used as coloring agents. This study aims to determine the effect of packaging, temperature and their interactions on microencapsulated butterfly pea flower and also to identify the antioxidant storage stability of microencapsulated butterfly pea flower. The type of packaging used is polypropylen plastic and aluminium foil with room temperature (28℃) and cold temperature (7℃) stored for 0 days as a control, 3 days, 5 days, 10 days, and 15 days. Response to be measured is antioxidant activity (%). The combination chosen is aluminium foil packaging with cold temperature storage (7℃ ). All the treatments had different IC50 values with the lowest IC50 value is D-Alu treatment with 490,10 ppm. The IC50 value at 5 storage point was significantly different at 5% significance level, with the lowest IC50 value on day-0 with 418,80 ppm. Water content of butterfly pea powder is 7,08%, which enters the criteria for spice powder of SNI.
Keyword: antioxidant, butterfly pea powder, storage, spray-drying, packaging

Judul: Karakteristik Barisan Eksak Pendek HomR(N, ) dan HomR( ,N)
Abstrak: Module merupakan generaIisasi dari ruang ve}ctor, dimana pada ruang vektor skalar-skalamya berasal dati suatu lapangan (field) sedangkan pada module skaJar-skalamya merupalam unsur-unsur dan suatu ring R dengan unsur satuan. Dari suatu grup komutatif yang unsur-unsumya dipadukan dengan unsur-unsur dart suatu ring R, maka akan mengbastlk.an yang namanya R-module. Himpunan seroua fungsi homomorfisma yang memetakan dati R-module M ke R-module N dinotasikan sebagai HomiM,N), dimana HomiM,N) juga merupakan suatu R-module.
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