Judul: Development of ready-to-drink white tea shot.
Abstrak: White tea leaf has been shown to possess physiological activities and has catechin which is the most abundant antioxidant compound found. This study was conducted to develop white tea shot formulated with white tea extract (WTE), ascorbic acid (AA), and sucrose (SC) in order to get high stability of catechin in the product. The first part of the study was conducted to choose best formula of white tea shot. The amount of water was set at 50 ml while WTE was set at 0.4% water basis. AA and SC amount were varied at 0.02, 0.05, 0.10% for AA and 3.0 and 6.0% for SC. The formula chosen was consists of 50 ml water, 0.4 % WTE, 0.10% AA, and 6.0% of SC. The decision was based on the rating hedonic test and short time storage catechin stability analysis of six formulation which the chosen formula revealed the least catechin lost and acceptable overall product likeness. The study also revealed that addition of AA is significant to lower catechin loss (P<0.05) while addition of SC did not reveal any effect (P>0.05). Physical, chemical, and microbiological characteristic was also observed in this study.
Keyword: Catechin, product development, white tea

Judul: Pembuatan Minuman Teh Hijau dalam Botol dengan Penambahan Ekstrak Klorofil Daun Suji (Pleomele angustifolia N. E. Brown) dan Evaluasi Mutunya selama Penyimpanan
Abstrak: Green tea is the most famous health drink in the world. Polyphenolic compounds contained in green tea have many usages, so that also with suji leaf (Pleomele angustifolia). Production of green tea drink with the addition of chlorophyll extract of suji leaf was increased its antioxidant content. The objective of this research was established the formulation of green tea drink product which combined with chlorophyll extracts from suji leaf, the long time of heating process, and the shelf life of drink product. The storage evaluate had been performed by ASLT (Accelerated Shelf Life Testing) method or acceleration method which was applied Arrhenius model with zero reaction orde and one reaction orde. This research had been done by two steps including preliminary research and main research. The experiment reported the best resulted of chlorophyll content analyze and antioxidant activity on chlorophyll extracts was performed at Cu2+ with 0 ppm concentration, therefore no addition Cu2+ on the chlorophyll extract drink. The best combination of tea amount and boil water at 85˚C to phenol total analyze and antioxidant activity was identified on 1.25: 100 (w/v). The formulation of ingredient consist of refined sugar 12 % (w/v), sitric acid 0,018 % (w/v), CMC 0,05 % (w/v), green tea 1,25 g/100 ml water, and chloropyll extract (10; 20; 30) ml/100 ml for each product. The first, second, and third sample were indicated 2.9; 2.9; and 2.9 for flavor score, 3.6; 3.5; and 3.4 for taste score, 3.5; 3.2; and 3.1 for color score; 3.6; 3.3; and 3.2 for overall score of organoleptic test. Organoleptic test had shown no significant effect. The experiment reported the best resulted of antioxidant activity was performed at third sample. The total bacterial analysis indicated that both of them period was described the value of Standard Plate Count < 2.5 x 102 colony/ml. The variable of ASLT (Accelerated Shelf Life Testing) was used including antioxidant activity value for sample which was sterilized until 10 min have shelf life 223 days at 25 oC respectively and in 15 min have shelf life 235 days at 25 oC respectively. Therefore the sterilization time was using sterilization 15 min than 10 min caused the shelf life was a long time. Based on the experiment indicated the optimal combination value of green tea to boil water was 1.25: 100 (w/v) at 85 oC. It also known the best ingredient formulation were refined sugar 12 % (w/v), sitric acid 0,018 % (w/v), CMC 0,05 % (w/v), green tea 1,25 g/100 ml water, and chloropyll extract 30 ml/100 ml to product based on organoleptic test and antioxidant activity. The sterilization processed of product for 15 min with 121 oC was better than product which was sterilized for 10 min with 121 oC.
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Judul: Rantai Markov Pada Bilangan Biner
Abstrak: Ranlai Markov {Xn} yang didefinisikan pada ruang peluang (n, P, P) dilllana n = (O,I],dan 'Fadalah cr-lapangan Borel, lllelllpunyai ekspansi biner X n = 0, dl(n) din).. n = I, 2, ... Mengkonstruksi rantai Markov ini diawali dengan memilih sembarang bilangan ..Y o di (0,1], nyatakan bilangan Xo dalam ekspansi biner Xo =0, diD) diD) ... d~O) ... dimana { d~O) ,n = 1,2, ... } adalah barisan nol dan satu. Peubah acak XI ditentukan oleh .Xo dan asumsi berikut.
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