Judul: Performance of Dye-Sensitized Solar  Cells Based on Suji and Pandan Leaf Dye Deposition Techniques
Abstrak: Daun suji dan pandan diketahui mengandung molekul pewarna yang dapat dideposisikan pada fotoanode, tetapi pengaruh teknik deposisi ini terhadap kinerja dye-sinthesized solar cell (DSSC) belum dikaji. Penelitian ini bertujuan merakit DSSC menggunakan pemeka cahaya dari pewarna daun suji (Dracaena angustifolia) dan pandan (Pandanus amaryllifolius), serta mengkaji pengaruh teknik pendeposisian pewarna terhadap efisiensi DSSC. Daun suji dan pandan diekstraksi untuk mendapatkan zat warnanya. Elektrode kerja berbasis kaca indium tin oxide dibentuk dari zat warna yang dideposisikan ke TiO2. Teknik pendeposisian yang digunakan adalah perendaman dan pencampuran. Elektrode lawan merupakan kaca indium tin oxide yang dilapisi grafit. Larutan elektrolit tersusun dari I- /I3- dan polistirena tersulfonasi. Nilai efisiensi DSSC tertinggi dihasilkan oleh teknik deposisi pencampuran pewarna, yaitu 2,56% untuk daun suji dan 2,28% untuk daun pandan. Kajian ini mengungkap bahwa teknik pendeposisian pewarna pada pemeka berpotensi meningkatkan kinerja DSSC., The leaves of suji and pandan are known to contain dye molecules that can be deposited on a photoanode. However, the effect of deposition techniques on dye-sinthesized solar cell (DSSC) performance has not been extensively investigated. This research aims to fabricate DSSC using a photosensitizer from suji (Dracaena angustifolia) and pandan (Pandanus amaryllifolius) leaf dyes, and to examine the impact of dye deposition techniques on DSSC efficiency. Suji and pandan leaves were extracted to obtain the dyes. Based on indium tin oxide-coated glass, the working electrode was prepared by depositing the colorants onto TiO2. The deposition technique used is immersion and mixing. The counter electrode consisted of indium tin oxide-coated glass coated with graphite. The electrolyte solution is composed of I- /I3- and sulfonated polystyrene. The highest efficiency of DSSC is obtained through the mixing deposition technique, resulting in respective efficiencies of 2,56% for suji leaf and 2,28% for pandan leaf. This study reveals that the dye deposition technique on sensitizers has the potential to increase the performance of DSSC.
Keyword: DSSC, dye deposition techniques, pandan leaf, suji leaf, sulfonated  polystyrene

Judul: Performance of Dye Sensitized Solar Cell Based on Sulfonated Polystyrene and Natural Dye Butterfly Pea Flower
Abstrak: Dye Sensitized Solar Cell (DSSC) adalah seperangkat sel surya yang berbasis fotoelektrokomia yang melibatkan transfer muatan listrik dari suatu fase ke fase lain Pewarna yang digunakan pada penelitian ini adalah sari alami bunga telang yang didapatkan dari proses tanpa maserasi. DSSC terdiri atas elektrode kerja, pewarna, dan elektrode lawan. Larutan elektrolit yang umum digunakan adalah I- /I3 - namun elektrolit ini mempunyai kelemahan mudah menguap sehingga dapat menurunkan nilai efisiensi DSSC. Penelitian ini bertujuan mengetahui penggunaan sari alami bunga telang sebagai zat warna pada sistem DSSC, pengaruh penambahan polistirena tersulfonasi disebabkan potensinya sebagai elektrolit DSSC dengan dua perlakuan berbeda yaitu pencampuran dan perendaman pewarna terhadap TiO2 yang memengaruhi nilai efisiensi kinerja DSSC. Nilai efisiensi DSSC dengan perlakuan pencampuran dan penambahan PSS menghasilkan efisiensi tertinggi sebesar 1,56%. Teknik pewarnaan terhadap PSS melalui proses pencampuran memperoleh efisiensi kinerja lebih baik dibandingkan dengan proses perendaman., Dye Sensitized Solar Cell (DSSC) is a set of solar cells based on photoelectrochemistry which involves the transfer of electrical charge from one phase to another. The dye used in this research is the natural essence of butterfly pea flowers obtained from a process without maceration. DSSC consists of a working electrode, dye, and counter electrode. The electrolyte solution that is commonly used is I- /I3 - , but this electrolyte has the weakness of being volatile so that it can reduce the efficiency value DSSC. This study aims to determine the use of natural butterfly pea flower as dyes in the DSSC system, the effect of adding sulfonated polystyrene due to its potential as a DSSC electrolyte with two different treatments, namely mixing and soaking dyes against TiO2 which affects the efficiency value of DSSC performance. The efficiency value of DSSC with PSS mixing and addition treatment resulted in the highest efficiency of 1.56%. The staining technique for PSS through the mixing process obtained better performance efficiency compared to the soaking process.
Keyword: bunga telang, DSSC, efisiensi, polistirena tersulfonasi

Judul: The Control and Eradication of Brucellosis in Cattle from the Standpoint of Human Health
Abstrak: Brucella abotus occurs boyh in man and cattle. The oragnism may trhrive wherever cattle re raised by man for breeding purpose. As such, spread to humans can easily be lessened if the diases is properly cotrolled an/or eradicated in cattle.
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