Lia Desi parwati

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Andrej Dujella

University of Zagreb

Hemin Koyi

Uppsala University

Jana Javornik

University of East London

Graham Martin

University of Leicester

Gwen Robbins Schug

University of North Carolina at Greensboro

Gabriel Gutierrez-Alonso

University of Salamanca

John Sutton

Macquarie University

Eros Carvalho

Universidade Federal do Rio Grande do Sul

Kevin Arbuckle

Swansea University

Jesper Hoffmeyer

University of Copenhagen

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Papers by Lia Desi parwati

Pengaruh Massa Kemiri Terhadap Volume Dan Karakterisasi Minyak Kemiri Hasil Pengolahan Tradisional Sebagai Bahan Dasar Biofuel the Effect of Mass of Hazelnut on the Volume of Traditionally Processed Hazelnut Oil as the Fundamental Substance of Biofuel and Its Characteritation

Abstrak Penelitian ini bertujuan untuk mengetahui pengaruh massa kemiri terhadap volume minyak ke... more Abstrak Penelitian ini bertujuan untuk mengetahui pengaruh massa kemiri terhadap volume minyak kemiri dan mengetahui sifat-sifat fisik (viskositas, massa jenis, kekeruhan, tegangan permukaan) minyak kemiri. Pembuatan minyak kemiri ini dengan cara tradisional yaitu dengan menghaluskan kemiri kemudian diambil santan kemiri lalu dimasak diatas kompor hingga mendidih dan kemudian memperoleh hasil minyak kemiri dengan memisahkan ampas kemiri dengan minyak kemiri. Hasil penelitian ini menunjukkan bahwa semakin banyak massa kemiri yang digunakan sebagai bahan pembuatan minyak, maka volume hasil minyak kemiri akan semakin besar, kemudian sifat-sifat fisik minyak kemiri yaitu sebagai berikut massa jenis minyak kemiri masuk dalam rentan massa jenis kemiri yaitu massa jenis minyak kemiri masuk dalam rentang massa jenis kemiri yaitu sebesar (0,932 ± 0,002) g/cm 3 , kekeruhan minyak kemiri yang diukur dengan sistem transmisi cahaya diperoleh rata-rata sebesar (72 ± 2)%, viskositas sebesar (11,80...

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Mixing of Graphite with X-ray Irradiated Water Towards the Exfoliation of Graphene Layers

Nanoscience &Nanotechnology-Asia

Background: This study aims to study the mixing of graphite with water irradiated by X-ray (low e... more Background: This study aims to study the mixing of graphite with water irradiated by X-ray (low energy gamma ray) towards the formation of graphene oxide (GO). Materials & Methods: The graphite is obtained from Zinc-Carbon (ZnC) battery wastes. This is a simple alternative technique in synthesizing GO based on X-ray irradiation without involving additional chemicals. X-ray irradiation is conducted upon 10 ml of distilled water using 20 kV of X-ray with irradiation time variation of 3 and 4 hours. The X-ray irradiation towards the distilled water causes radiolysis to occur in the water. The graphite solution consists of 0.6 grams of graphite in 100 ml of distilled water. The GO is formed by mixing the X-ray irradiated water with 5 drops of the graphite solution. The sample solutions obtained are shaken several times and left to settle for a night. The samples are then characterized using UV-Visible (UV-Vis) and Fourier transform infra-red (FTIR) spectroscopies, and tunneling electron...