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All Journal Program Kreativitas Mahasiswa - Karsa Cipta ALCHEMY Jurnal Penelitian Kimia
Glar Donia Deni
Jurusan Kimia, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang
Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science Materials Science & Nanotechnology Other

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PENINGKATAN KINERJA SOLAR CELL CNT-ZNO NANO MATERIAL (DYE-SENSITIZED SOLAR CELL) DENGAN AUTO SCANNING POSISI MATAHARI 3 DIMENSI Wibowo, Andri; Deni, Glar Donia; Guntoro, Kasto Wijoyo Teguh; Suseno, Jatmiko Endro
Program Kreativitas Mahasiswa - Karsa Cipta PKM-KC 2013
Publisher : Ditlitabmas, Ditjen DIKTI, Kemdikbud RI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (500.657 KB)

Abstract

This study proposed a tool that can set the direction of the solar cells that will always follow a shift of the light source and always facing perpendicular to the sun using solar system auto scanning. Commercial DSSC was proposed using a synthetic dye that is kind of a ruthenium complex dye has reached 10% efficiency, but the availability and the price is expensive does not allow for the development of this research so that the research will be used ZnO with Dye N3 a more easily available and cheaper. To optimize the performance of the solar cell, material will be added CNT nano-materials on silicon. Prototype of dye-sensitized solar cell (DSSC) was made using materials ZnO and CNTs that can increase the power by 5.18%. Auto scanning was able to move in 3 dimensions to follow the direction of motion of the sun through the increase reached 7.5%. Electric control system was set up by detecting the maximum light intensity and adjusting the position of the direction of the solar cell, solar lighting by using microcontroller ATMEGA 32, light sensor and motor driver. This technology had been able to improve 14.73%.
ANTI-HYPERCHOLESTEROLEMIA ACTIVITY OF ETHANOL EXTRACT Peperomia pellucid Mazroatul, Chasanah; Deni, Glar Donia; Habibi, Nur Ahmad; Saputri, Gita Febri
ALCHEMY Jurnal Penelitian Kimia Vol 12, No 1 (2016): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.12.1.948.88-94

Abstract

Hypercholesterolemia is a major cause of cardiovascular disease such as coronary heart disease. Betel water (Peperomia pellucida) is a type of plants that have antioxidant compounds that could delay, retard and prevent the oxidation of lipids, both enzymatic and non-enzymatic. This study aimed to determine the effect of ethanol extract Peperomia pellucida against total cholesterol, HDL, LDL, and triglycerides in the serum of white rats (Wistar) were given a diet aterogenetik, so it can be used as prevention of atherosclerosis. The active compounds contained in the water after screnning betel phytochemicals includes flavonoids, tannins, alkaloids, steroids and quinones. In vivo studies conducted by true experimental method with pre and post test with control group design. Rats were divided into 3 groups: group A positive control is given aterogenetik diet, group B and C were given diet Peperomia Pellucida aterogenetik and extract orally at a dose of 150 mg/kg and 300 mg/kg. Diet aterogenetik given as much as 20 grams per day for 14 days. Data obtained include total cholesterol, HDL, LDL, and triglycerides were analyzed by statistical methods Paired T Test oneway ANOVA (P < 0.05). The study of total cholesterol, HDL, LDL and triglycerides showed ethanol extract of Peperomia pellucida at a dose of 300 mg/kg body weight can lower total cholesterol and LDL significantly, but there was no significant decline in triglycerides and can increase HDL levels.
Co-Authors Andri Wibowo Gita Febri Saputri Jatmiko Endro Suseno Kasto Wijoyo Teguh Guntoro Mazroatul, Chasanah Nur Ahmad Habibi