Judul: Kandungan Kurkuminoid dan Daya Antioksidan Aksesi Temulawak (Curcuma xanthorrhiza Roxb.) asal Sukabumi
Abstrak: Curcuma xanthoriza Roxb. is one kind of curcums which useful as medicine plants. It containts curcuminoid which has antioxidant bioactivity. This study aimed to measure curcuminoids content and antioxidant bioactivity of Ciemas (Sukabumi) accessions compared with varieties of Kursina 3 from Bogor. HPLC method were used to determined curcuminoid content. The antioxidant bioactivity of both samples were evaluated using 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical method. Percent yield ethanol 70 % extract of Curcuma xanthoriza Roxb. were 15.85 % (Kursina 3) and 19.94 % (accession). The curcuminoid content of Kursina 3 and acccession were 0.79 % and 0.99 %, respectively. The result of IC50 were 82.8 ppm (Kursina 3) and 47.97 ppm (accession) respectively. Based on the result of the study, Sukabumi promising lines curcuma has the potential to be further researched and developed as new varieties.
Keyword: antioxidant, Curcuma xanthoriza Roxb, curcuminoid.

Judul: Bioaktivitas Antioksidan dan Antiinflamasi Secara In Vitro serta Kandungan Kurkuminoid Temulawak dan Kunyit Asal Sukabumi
Abstrak: Curcuma xanthorrhiza and Curcuma domestica are kind of medicinal plants which have many health benefits. Both of them have curcuminoid content which is useful as an antioxidant and anti-inflamatory. In this study, ethanol extracts of C. xanthorrhiza and C. domestica promising lines from Sukabumi, Indonesia were investigated for the presence of curcuminoids, antioxidant and anti-inflamatory activities. HPLC method were used to determined curcuminoids content. The antioxidant (radical scavenging) potential of the samples was evaluated using 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical method. While for the anti-inflamatory activity, the in vitro cyclooxygenase 2 (COX2) inhibition method was used. The curcuminoid content of C. xanthorrhiza and C. domestica were 31.27 mg/g and 66.32 mg/g, respectively. IC50 values for DPPH radical scavenging activity were 81.99 μg/mL and 73.31 μg/mL, with C. domestica having lowest value and most potent than C. xanthorrhiza. Percent inhibition values for COX2 inhibitor activity were 74.84 % and 67.96 %, with C. domestica having the highest value. In this study, the ethanol extracts of C. domestica promosing line from Sukabumi of Indonesia exhibited most in curcuminoids content, antioxidants properties and anti-inflamatory activity than C. xanthorrhiza promosing line.
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Judul: Model Input-output dalam Masalah Network Flow
Abstrak: Production process is a process, which is done by industry, to transform input into output. According to the type of output and its activity, industry can be classified into various sectors, which are connected to each other. Therefore, a model to analyze the connection among sections is needed. The model is known as input-output model (IO model). IO model presents an IO table, which shows informations about the transaction between goods and services in each economic sector. Furthermore, the IO model also shows that the amount of all input is the same as the amount of all output. In this paper, the transaction of each economic sector in IO table is analyzed using network flow theory. The formulated network flow problem implies that each sector represents partly as a producer and also as a consumer. This paper also solves a minimum cost circulation problem.
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