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All Journal BERKALA SAINSTEK UNEJ e-Proceeding Computational and Experimental Research in Materials and Renewable Energy (CERiMRE)
Arry Y. Nurhayati, Arry Y.
Physics Department Faculty of Mathematics and Natural Sciences, University of Jember
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Education Energy Materials Science & Nanotechnology Mathematics Physics

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Lead Distribution on Marsilea crenata and Its Effect on Growth and Total Protein Content Nurhayati, Arry Y.; Hariadi, Yuda C
UNEJ e-Proceeding Indonesian Protein Society (IPS), International Seminar and Workshop 2014
Publisher : UNEJ e-Proceeding

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Abstract

The increasing risk of lead poisoning such as neuro-behavioral disorders and neurological damage; hypertension, brain and kidney damage; DNA and antioxidant defense system cell damage in developing countries due to the increase in lead contaminated environment. This research was aimed to investigate the effects of prolonged lead on protein levels in the Marsilea crenata plant. The plants have been used for generation by local farmers as a daily source of vegetables during crop growing season. The plants are also known as an exotic cuisine known as Semanggi Surabaya. Marsilea crenata were grown inside a glasshouse using a modified Hoagland solution in different levels of Pb. The growth, Pb content, and total protein content were then measured for eight weeks during exposure. The result has shown that the root of Marsilea crenata has the capability to absorb lead and translocate them inside its shoots and leaves, with the biggest amount were translocated to the younger leaves during one week of exposure and was then accumulated in the old leaves after longer exposures. Total protein content was higher on younger leaves than in older leaves, followed by shoot and then the root. The result has shown that with deep knowledge of Marsilea crenata it is possible of using it as a phytoremediator or as a source of food since the total protein was translocated on the edible part. Still, awareness is still needed since the plant may contain high levels of Pb with the existence of stress symptoms. It should be avoided to reduce the risk of lead poisoning. Keywords: Lead, Marsilea crenata, growth, protein
Energy Yield of the Carbonized Plant Leaf, Petiole and Branch Biomass Briquettes for Sustainable Production of Future Fuels Nurhayati, Arry Y.; Naufal, Achmad Zulfi N.; Hariadi, Yuda C.
Computational And Experimental Research In Materials And Renewable Energy Vol 5 No 1 (2022): May
Publisher : Physics Department, Faculty of Mathematics and Natural Sciences, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/cerimre.v5i1.31509

Abstract

The effective use of waste biomass is an important factor for sustainability and global energy consciousness. Unsurprisingly, tree wastes such as leaves, petiole and branch are plentiful during trimming or autumn season which offer an economical source of biomass. The objective of this study was to probe the mechanical and thermal characteristics of briquettes created from tree waste of langsat, guava and rambutan tree. Collected tree wastes (leaves, petiole and branches) were chopped, mixed and then carbonized at 400-600 °C using a Charcoal Retort tube system. The briquettes were molded manually using a Hydraulically Briquetting Machine at pressures of 20 and 50 N/cm2 for half an hour to 3 hours with regards on the type, density and fragments of the tree. Two system and machine were designed and fabricated by Biophysics Lab, Dept. of Physics, Faculty of Mathematics and Natural Sciences, Universitas Jember. Results indicated that briquettes made from tree waste of langsat, guava and rambutan have signs of mechanical and thermal properties which can be used as briquettes for various industrial uses.Keywords: Sustainability, Alternate fuel, Tree waste, Biomass, Briquette
Analisis Variasi Faktor Eksposi dan Ketebalan Irisan Terhadap CTDI dan Kualitas Citra Pada Computed Tomography Scan Nurhayati, Arry Y.; Nariswari, Nia N.; Rahayuningsih, B.; Hariadi, Yuda C.
BERKALA SAINSTEK Vol 7 No 1 (2019)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v7i1.9913

Abstract

CT Scan merupakan alat pencitraan sinar-X yang dipadukan dengan komputer pengolah data sehingga mampu menghasilkan gambar potongan melintang tubuh dan memiliki dosis relatif lebih tinggi, karena berasal dari radiasi primer dan radiasi hambur dari setiap slice. Dosis yang dihasilkan dipengaruhi oleh parameter scan yaitu faktor eksposi (tegangan tabung, arus- waktu rotasi) dan ketebalan irisan. Kuantitas dosis pada pemeriksaan CT Scan digunakan metode Computed Tomography Dose Index (CTDI). Penelitian ini dilakukan untuk mengatahui efek variasi parameter scan terhadap CTDI dan kualitas citra dengan menggunakan phantom. Hasil data yang diperoleh menunjukkan bahwa pada variasi 200 mAs, 120 kV dan 5 mm menghasilkan CTDIvol dan CNR optimum dengan nilai masing-masing 25.8 mGy dan 3.51. Hal ini disebabkan adanya keseimbangan nilai antara faktor eksposi yang tidak memiliki rentang yang terlalu jauh sehingga menghasilkan energi dan kuantitas sinar X yang seimbang dan ketebalan irisan tidak menghasilkan noise tinggi sehingga objek dalam phantom tetap dapat terlihat lebih baik. Kata Kunci: CT Scan, CTDI, CTDIvol, LCR, CNR.
Co-Authors Hariadi, Yuda C. Nariswari, Nia N. Naufal, Achmad Zulfi N. Rahayuningsih, B. Yuda C Hariadi, Yuda C