Judul: Effects of Inlet Temperature and Feed Concentration on Quality of Spray Dried Instant Green Tea Powder
Abstrak: Tea is a popular drink because of its unique aroma and characteristic flavor which is controlled by key chemical components which are volatile terpenes, teaine, organic acids, and polyphenols. Currently, the quality ofinstant green tea powder has been improved. It has some advantages like increase solubility, shelf life, and flavor. Instant green tea powder is produced trough drying method like spray drying.This process, unfortunately, potentially has deleterious effects on some component in green tea, like polyphenol compounds and volatile compounds. The objective of this research is to study effect of inlet air temperature and feed concentration in feed on quality of green tea powder. Main material used in this research was green tea leaf which was supplied by Boonrod Tea Factory. The drying method used in this research was spray drying. There are three level of inlet temperature used in this research, which were 180 oC, 200 oC, and 220 oC. This research also used three level of feed concentration which were 3%, 6%, and 9%. Parameters studied in this research were volatile compounds, chemical compound, and physical properties of green tea powder. The result shows that inlet temperature and feed concentration significantly affected (p<0.05) the quality of green tea powder. Generally, increased temperature (up to 200 oC inlet temperature) decreases amount and type of volatile compound, particularly ketone, total polyphenol, teaine content, solubility, and bulk density (p<0.05). On the other hand, increased feed concentration increases L value, b value, gallic acid, teaine, and catechin content (p<0.05). The best green tea powder is the one with 6% total solid in feed and 180 0C inlet temperature. It has highest amount of terpene and also contains hydrocarbon and aldehide.It also has low moisture content (4.17 ± 0.02 %), high total polyphenol content (26.42 ± 0.07 %), high teaine content (7.06 ± 0.01 %), and highest catechin content (26.16 ± 0.13 %). Physical properties analysis shows it has low water activity (0.21 ± 0.02), lowest a value (3.80 ± 0.35) low b value (18.87 ± 0.14) high hygroscopicity (9.09 ± 0.94 %) high solubility (98.79 ± 0.53 %) and low bulk density (0.51 ± 0.18 g / mL).
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Judul: Development of Effervescent Green Tea (Camellia sinensis var. sinensis ).
Abstrak: Green tea has high phenolic compound which gives good impact to body’s health, due to its high phenolic compound the taste is slightly bitter, which decrease consumer acceptance. To overcome this problem, effervescent tea was presented. Effervescent is the reaction of acid and base producing CO2 when dispersed in water resulting a fizzing mouthfeel which covering undesired taste and giving other advantages. Discovering the best formulation based on its physical, chemical and sensory properties to increase the consumer acceptance is the objectives of this research. The quality of green tea powder was analyzed, it had bulk density 0.60 ± 0.03 g/mL, solubility 76.82 ± 0.66 %, and color (L*, a*, b*) 64.28 ± 0.45; 2.05 ± 0.11; 27.24 ± 0.41. The TPC (Total Phenolic Content) and moisture content were 5.56 ± 0.06 (% w/w dry basis) and 1.84 ± 0.11 % (wb). The second study was determination of the best formulation, there were 16 formulas which were developed with mixture design technique. The components including stevia (2%) as fixed ingredient, green tea powder (Camellia sinensis var. sinensis) (15-40%), mixture of sodium bicarbonate and citric acid (50-65%) with ratio 1:1, maltodextrin (10-20%). Based on the physical, chemical, and sensory properties the best formula consists of 56% mixture citric acid and sodium bicarbonate, 29% green tea powder, and 15% maltodextrin. This formula then used to make the final product and its quality was determined. The hardness 115.80±4.96 N, color as 0Hue 86.46±0.09, effervescent time 183.33±2.08 second, for pH 5.65±0.01, moisture content 1.92±0.03% (wb) and TPC 2.34±0.058 (% w/w db). Consumer acceptance test was conducted with 100 participants with different background (gender, age, occupation, and education), the acceptability and buying intention were considered high (87% and 74% respectively). In conclusion this product has met the standard of effervescent product and finely accepted by consumer.
Keyword: Effervescent, Effervescent tea, Consumer acceptance, Green tea

Judul: Prevalensi Kecacingan Ancylostoma spp pada Anjing (Studi Kasus di Rumah Sakit Hewan Jakarta Periode Januari-Desember Tahun 2000).
Abstrak: Anjing seperti halnya juga hewan-hewan lain sangat mungkin terserang penyakit, salah satunya oleh infeksi cacing. Salah satu cacing yang banyak menginfeksi pasien-pasien anjing di Rumah Sakit Hewan Jakarta adalah cacing Ancylosroma spp. Jumlah pasien anjing yang terinfeksi cacing Ancylostomn spp selama Tahun 2000 sebanyak 491 ekor.
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