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All Journal Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Jurnal Teknologi Reaktor Nuklir Tri Dasa Mega Natural B Journal Of Vocational Health Studies Darmabakti Cendekia: Journal of Community Service and Engagements Jurnal Abdi Masyarakat Indonesia
Risalatul Latifah
Departemen Fisika, Fakultas Matematika Dan Ilmu Pengetahuan Alam (FMIPA), Universitas Brawijaya - Indonesia
Humanities Astronomy Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Materials Science & Nanotechnology Physics Public Health Social Sciences

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Journal : Natural B

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Insecticide Effects on Membrane Potential of Catfish Egg Cell (Clarias batrachus) Unggul Punjung Juswono; Kusharto Kusharto; Yeni Cahyati; Risalatul Latifah
Natural B, Journal of Health and Environmental Sciences Vol 1, No 3 (2012)
Publisher : Natural B, Journal of Health and Environmental Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (373.853 KB) | DOI: 10.21776/ub.natural-b.2012.001.03.9

Abstract

Pollution has been occured in our environment due to daily life waste, industrial and using of peptiside in agroindustrial farm. Over usuage and dose of peptiside could be harmfull to the farm environment especially for fish farm. Measurement of membrane potential of fish egg cells is a simple metode to investigate water polution level. Membrane potential of fish egg cells can be measured using microelectrode probe which is connected to an electrometer. The changing of membrane potential value indicate the level of water polution. Variation of peptiside concentrations cause the changing of potential membrane value. Increasing of peptiside concentration cause decreasing of potential membrane. Its may due to some blocking of channel and other protein by peptiside molecule so the permeability of membrane to ions is decrease. The results of our experiment show that the increasing of peptiside concentration cause decreasing of the membrane potential value. For peptiside concentration of  0.4% decrease potential membrane to -28 ± 5 mV. It means that the increasing peptiside concentration cause significanly decrease in potential membrane which may be used for prediction of water polution level.
Thermal Neutron Flux Measurements at Room Treatment LINAC iX 15 MV Risalatul Latifah; Johan A E Noor; Bunawas Bunawas
Natural B, Journal of Health and Environmental Sciences Vol 2, No 2 (2013)
Publisher : Natural B, Journal of Health and Environmental Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1418.117 KB) | DOI: 10.21776/ub.natural-b.2013.002.02.14

Abstract

Linac is operated at above 10 MV will generate secondary radiation in the form of neutron emission from the reaction of the high photon energy linac striking the material components of linac such us targets, collimators and filters. Secondary radiation will increase the probability of the secondary cancer risk in patients due to increasing the dose of radiation received. This study evaluated the thermal neutron flux at the indoor spatial operated 15 MV linac using foil activation method. A total of 14 Indium-115 foil placed in the treatment room were exposed to 15 MV linac plane for 1 minute. Results showed the highest flux are around isocenter . With the flux value of additional dose due to the neutron flux at Sv/menit. FLux decreases as distance function. Related to radiation protection efforts for radiation workers, the contribution coming from the neutron dose necessary acted upon by adding shielding on the door.
Co-Authors Achmad Hidayat Ali Mustofa Aprilia, Faridha Baroatul K, Lia Budi P Bunawas Bunawas Bunawas Bunawas Bunawas Bunawas Bunga Puspita, Mayang Dewi ANGGRAENI Firdy Yuana Hafizhudin Kafaka Hapsari, Shinta J. Jannah, Naily Z. Johan A E Noor Johan A.E. Noor Johan Andoyo Effendi Noor Johan Andoyo Effendi Noor Kusharto Kusharto Mohammad Robet Kamel Rizqi Ilahil Aziz Muhaimin Muhaimin Muqmiroh, Lailatul Nikky Anis Suroiyah, Nikky Anis Nurdin, Dezy Z.I Praptono, Soegardo Indra Puspita, Mayang Bunga Rosyid, Muhammad Rusmanto, Rusmanto Sensusiati, Anggraini Dwi Sheliyana, Putri Sri Andreani Utomo, Sri Andreani Triswantoro Putro Unggul Punjung Juswono Yeni Cahyati