Judul: Characteristics of peel off mask made from Spirulina and collagen during storage in different packages
Abstrak: Masker berbahan Spirulina dan kolagen ikan memiliki aktivitas antibakteri terhadap bakteri penyebab jerawat. Lingkungan dapat memengaruhi karakteristik masker, sehingga diperlukan pengemasan. Tujuan penelitian ini menentukan pengaruh perbedaan kemasan terhadap karakteristik fisik, kimia, dan mikrobiologis masker selama penyimpanan. Masker dalam penelitian ini disimpan dalam kemasan round jar, alumunium foil sachet, dan tube pada suhu ruang selama 28 hari dengan analisis data menggunakan analisis ragam Rancangan Acak Lengkap Faktorial (RALF). Masker dalam ketiga kemasan selama penyimpanan 28 hari memiliki nilai sensori yang tidak mengalami perubahan, yaitu berwarna hijau pekat, tidak berbau, konsistensi kental, dan homogen. Faktor jenis kemasan dan lama penyimpanan berpengaruh nyata (p<0.05) terhadap nilai pH masker, waktu mengering masker, viskositas, kadar air, dan kelembaban kulit, dengan nilai yang masih sesuai dengan persyaratan mutu masker yang baik. Masker dalam kemasan terpilih alumunium foil sachet selama penyimpanan 28 hari memiliki nilai total mikroba yang masih sesuai dengan persyaratan masker yang baik yaitu sebesar <1.0x102 CFU/g., Masks made from Spirulina and fish collagen have antibacterial activity against acne-causing bacteria. The environment can affect the characteristics of masks, therefore the packaging is necessary. The purpose of this research was to determine the effect of different packaging on the physical, chemical, and microbiological characteristics of mask during storage. The masks in this research were stored in round jar, alumunium foil sachet and tube at room temperature for 28 days. A completely randomized factorial design was used in this study. The sensory values of the three masks did not change after 28 days such as in its color, odor, and consistency. The physical characteristics were dark green color, odorless, thick consistency, and homogenous. The type of packaging and storage time had a significant effect (p<0.05) on the pH values of the mask, mask drying time, viscosity, moisture content, and skin moisture, with values that were still in accordance with the requirements for good quality masks. The masks in the selected aluminum foil sachets for 28 days of storage have a total microbial value that is still in accordance with the requirements of a good mask, namely <1.0x102 CFU/g.
Keyword: packaging, collagen, mask, Spirulina

Judul: Aktivitas Antibakteri dan Sediaan Masker Peel Off Berbahan Spirulina platensis terhadap Bakteri Propionibacterium acne.
Abstrak: Spirulina platensis merupakan mikroalga kelompok cyanobacteria yang mengandung senyawa aktif dan berpotensi sebagai antibakteri. Tujuan penelitian ini yaitu menentukan aktivitas antibakteri terhadap P. acne dari ekstrak S. platensis kultur dan komersial, serta sediaan masker peel off yang mengandung ekstrak dan biomasa S. platensis. Tahapan penelitian meliputi kultivasi, pemanenan S. platensis, ekstraksi senyawa aktif, dan aplikasi S. platensis sebagai sediaan masker peel off berbahan polivinil alkohol, hydroxy propyl methyl cellulose, metil paraben, gliserin serta analisis aktivitas antibakteri. Kultivasi S. platensis menggunakan media organik. Biomasa S. platensis diekstraksi menggunakan etanol PA 96%, selanjutnya dianalisis fitokimia. Analisis aktivitas antibakteri dilakukan dengan ekstrak S. platensis dan sediaan masker peel off. Aktivitas antibakteri ekstrak S. platensis hasil kultur dengan konsentrasi 2 mg/mL, 4 mg/mL dan 8 mg/mL berturut-turut yakni 4.63±0.35 mm, 8.81±0.08 mm, 9.56±0.26 mm, sedangkan aktivitas antibakteri dalam sediaan masker peel off terhadap bakteri P. acne yakni 10±0.35 mm.
Keyword: antibakteri, organik, Propionibacterium acne, Spirulina platensis

Judul: Query Expansion based on Bilingual Dictionary Using Conditional Probability
Abstrak: Query expansion is a technique that can be used to bridge vocabulary gaps between queries and documents in the collection. With query expansion, user will be helped to formulate queries well so that user will optimize the search result. In this study, the expansion term was resulted from the translation of bilingual dictionary. Subsequently, several terms of expansion were elected based on the closeness of its relationship with the original query. This research showed that conditional probability can be used to select expansion term in bilingual translation method query expansion. The result of 1000 documents was more than 97% relevan document can be retrieved by this system. The more expansion term used, the larger number relevan document was retrieved.
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