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All Journal HAYATI Journal of Biosciences Jurnal Ilmu Pertanian Indonesia Proceedings of Annual International Conference Syiah Kuala University - Life Sciences & Engineering Chapter Scientific Contribution Oil and Gas
AHMAD BEY
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Energy Engineering Environmental Science Other

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Tolerance Levels of Roadside Trees to Air Pollutants Based on Relative Growth Rate and Air Pollution Tolerance Index SULISTIJORINI RINI; ZAINAL ALIM MASUD; NIZAR NASRULLAH; AHMAD BEY; SOEKISMAN TJITROSEMITO
HAYATI Journal of Biosciences Vol. 15 No. 3 (2008): September 2008
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (66.094 KB) | DOI: 10.4308/hjb.15.3.123

Abstract

Motor vehicles release carbon monoxide, nitrogen dioxide, sulphur dioxide, and particulate matters to the air as pollutants. Vegetation can absorb these pollutants through gas exchange processes. The objective of this study was to examine the combination of the relative growth rate (RGR) and physiological responses in determining tolerance levels of plant species to air pollutants. Physiological responses were calculated as air pollution tolerance index (APTI). Eight roadside tree species were placed at polluted (Jagorawi highway) and unpolluted (Sindangbarang field) area. Growth and physiological parameters of the trees were recorded, including plant height, leaf area, total ascorbate, total chlorophyll, leaf-extract pH, and relative water content. Scoring criteria for the combination of RGR and APTI method was given based on means of the two areas based on two-sample t test. Based on the total score of RGR and APTI, Lagerstroemia speciosa was categorized as a tolerant species; and Pterocarpus indicus, Delonix regia, Swietenia macrophylla were categorized as moderately tolerant species. Gmelina arborea, Cinnamomum burmanii, and Mimusops elengi were categorized as intermediate tolerant species. Lagerstroemia speciosa could be potentially used as roadside tree. The combination of RGR and APTI value was better to determinate tolerance level of plant to air pollutant than merely APTI method. Key words: air pollutants, tolerance of roadside trees, relative growth rate, physiological responses, air pollution tolerance index
Penentuan Musim Tanam Tanaman Pangan Berdasarkan Pola Curah Hujan di Lima Tapak Utama Proyek Pembangunan Penelitian Pertanian Nusa Tenggara Sub-Basis Maumere, Kabupaten Sikka Ahmad Bey; Irsal Las; M HG Yasin
Jurnal Ilmu Pertanian Indonesia Vol. 1 No. 2 (1991): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

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This study was conducted...
Ocean-atmosphere analysis of Super Typhoon Songda 2011 over Western North Pacific Ocean Yopi Ilhamsyah; Ahmad Bey; Edvin Aldrian; Junaidi M. Affan
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 3, No 3 (2013): Addendum
Publisher : Syiah Kuala University

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The purpose of the research is to understand the influences of ocean and atmosphere to the formation of Super Typhoon Songda 2011. Daily SST from NOAA AVHRR with spatial resolution of 0.5° in latitude and longitude was used to study upper oceanic response to the formation of Typhoon Songda. Meanwhile, 3-hourly meteorological data from ARP model with spatial coverage of 0.5° Latitude x 0.5° Longitude cover 201 x 101 points from 25° N - 20° S and 70.0° E – 170.0° E as well as 13 levels of atmospheric columns was also used in the study. The study was also supported by  MT-SAT satellite images. The result showed that from early disturbances until reaching mature stage of Typhoon Songda, SST over WNP reached averages temperature of 30˚C. Warm ocean waters continuously produce heat and moisture to the air that are necessary to fuel the genesis, development, formation and intensification of Typhoon Songda. The study also proved that light vertical wind shear (850 – 200 hPa) at about 0 – 5 knot was observed in the early development of Songda at 1800 UTC on May 19th. For the time being, weak vertical wind shear extended to the northwestern of Pacific Ocean. Thus, it made the system to moved toward northwest and reached category Super Typhoon few days later on May 26th. The study also showed the present of Monsoon trough. Monsoon trough occurred where easterly wind met the reversal southerly wind. The region was stretched from southeast to northwest part of WNP Ocean and designated by an extended low pressure area at the surface as well as extended bands of thunderstorms as observed by satellite imagery. On the other hand, potential vorticity shown in the present paper is useful to obtain an understanding of atmospheric motions and development of the upper-level disturbance. Potential vorticity maximum characterize strong vorticity and upward motion. Conversely, weak vorticity with downward motion is demonstrated by mininum potential vorticity.
19 ROLE OF CO2 GAS EMISSION TAX ON FOSSIL FUEL IN REDUCING ENVIRONMENTAL IMPACT “A PERSPECTIVE FOR INDONESIA” Kemas Fachruddin; Akhmad Fauzi; Ahmad Bey; Surjono H.Surtjahjo
Scientific Contributions Oil and Gas Vol. 30 No. 2 (2007): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

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In the year 2001, Indonesia was ranked 21st in producing CO2 emissions. In 1990 thetotal emission of CO2 from the burning of fossil fuel was estimated at 83.8 million tonnesand by the end of the year 2020 the total emissions are estimated to be 368.3 milliontonnes. Currently, Indonesia has no specific regulation in place for controlling CO2 emis-sions either in the form of an act or government regulation.
Co-Authors Akhmad Fauzi Edvin Aldrian Irsal Las Junaidi M. Affan Kemas Fachruddin M HG Yasin NIZAR NASRULLAH SOEKISMAN TJITROSEMITO Sulistijorini Surjono H.Surtjahjo Yopi Ilhamsyah ZAINAL ALIM MASUD