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<![CDATA[IDENTIFIKASI KARAKTER TOLERANSI CEKAMAN KEKERINGAN BERDASARKAN RESPONS PERTUMBUHAN DAN HASIL GENOTIPE JAGUNG ]]>
<![CDATA[Roy Efendi]]>;
<![CDATA[Muhammad Azrai]]>
<![CDATA[ Widyariset Vol 13, No 3 (2010): Widyariset ]]>
Publisher : <![CDATA[Pusbindiklat - LIPI ]]>
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DOI: 10.14203/widyariset.13.3.2010.41-50
<![CDATA[The objectives of this experiment were to study (a) response of maize genotypes drought stress during anthesis up to grain filling or maturity stages and (b) determine characters as drought tolerance indicators. Factorial randomize complete block design this experiment was used with two factors. The first factor was drought tolerance and sensitive genotypes and the second factor was periods of drought stress consisted of three condition: (i) drought at anthesis up to grain filling stages, (ii) drought at anthesis up to maturity stages, and (iii) optimum condition.The results of research showed that tolerance genotypes had the abilities to maintain shoot growth (plant height and shoot dry weight) and suppress leaf damage under drought condition. The abilities of drought tolerant were supported by heavy root dry weight while resulted the extend of root absorbing more water. The ability of maize genotypes in keeping shoot growth, suppressing transpiration due to lower leaf stomata density and higher water use efficiency is an important factors in suppressing yield loss in drought condition. The sensitive genotypes wasnot had these abilities since it had low root dry weight, therefore, the root extension was not supported for absorbing adequate amount of water for shoot growth (shoot dry weight and plant height) and increasing the intensityof damage leaf under drought condition was high. Besides, the sensitive genotype had higher leaf stomata density and lower level of water use efficiency which caused the increasing yield decrease (grain wieght/plant) compare to tolerance genotypes, more over, in longer drought period of theirs genotypes were not filled.]]>
<![CDATA[Karakterisasi Korosi Baja SS-430 pada lingkungan NaCL ]]>
<![CDATA[Heri Jodi]]>
<![CDATA[ Widyariset Vol 13, No 3 (2010): Widyariset ]]>
Publisher : <![CDATA[Pusbindiklat - LIPI ]]>
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DOI: 10.14203/widyariset.13.3.2010.149–155
<![CDATA[SS-430 is a ferrite type alloy that can be selected for the base material of sea-water duct-pipes in the water supply system of a power reactor, but in general the ferritic alloy is not as good as austenitic with respect to corrosion resistance. Then NaCl environment is used to examine corrosion rate of SS-430. The corrosion was observed in four concentrations of NaCl solution. The experiments were carried out using M-273 EG&G potentiostate test instrument with polarization methode. The microstructure of post-corrosion samples were analyzed with an EDS attached to SEM instrument to detect the presence of any viable corrosion byproducts. X-ray diffraction methode was also used to detect any possible emerging corrosion on samples surfaces. The results showed that SS-430 suffers very little corrosion in NaCl environment, and that this material turn out to have an outstanding resistance toward NaCl corrosion. The possible ensuing corrosion byproducts are chrome oxides and iron oxides.]]>
<![CDATA[EVALUASI PERTUMBUHAN TANAMAN UJI KETURUNAN JATI (Tect ona gra ndis L.f.) MENGGUNAKAN ANALISIS MULTIKRITERIA ]]>
<![CDATA[Hery Kurniawan]]>
<![CDATA[ Widyariset Vol 13, No 3 (2010): Widyariset ]]>
Publisher : <![CDATA[Pusbindiklat - LIPI ]]>
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DOI: 10.14203/widyariset.13.3.2010.77–85
<![CDATA[This research was aimed to determine the rank of tree family in the teak (Tectona grandis L.f.) progeny test based on multi criteria analyses. Research was conducted using deductive approach by collecting data on experiment site consisting of 10 blocks. The proposed criteria and indicators were based on literature study focusing on (1) simple measurement in the field, (2) principle of management objective, and (3) basic principle of silviculture. The selected criteria were stem quality, crown condition and tree growth, and each criteria was derived into indicators and verifiers. Based on the frequency of appearance in the top 25% on each block, the top ten superior families were seedlot number 90 with 8 times, followed by seedlot number 11 and 31 with 7 times, and then seedlot number 10, 106, 124, 15, 18, 4, and 46 with 6 times, respectively.]]>
<![CDATA[Stream Water Temperature Studies at Forested Watersheds : a Review ]]>
<![CDATA[Luki Subehi]]>
<![CDATA[ Widyariset Vol 13, No 3 (2010): Widyariset ]]>
Publisher : <![CDATA[Pusbindiklat - LIPI ]]>
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DOI: 10.14203/widyariset.13.3.2010.15-26
<![CDATA[Temperatur air sungai yang berpengaruh terhadap proses biologi, kimia, dan fisika yang terjadi di dalam ekosistem sungai telah menjadi perhatian utama dari sejumlah kegiatan para peneliti. Dianalisis secara statistik menggunakan root mean square (Rms), harmonik metode (A: Amplitude, φ: waktu tunda) dan perubahan dari spesifik debit (ΔQs), temperatur udara (ΔTa) dan temperatur air (ΔTw) selama periode hujan telah dilakukan dalam penelitian ini. Berdasarkan nilai-nilai fluktuasi, kita bisa mengklasifikasikan daerah aliran sungai menjadi tiga kelompok luasan DAS: kecil, menengah, dan besar. Di daerah aliran sungai besar, nilai fluktuasi Tw dijelaskan sebagai pengaruh radiasi matahari dan proses perpindahan panas, sedangkan daerah aliran sungai kecil, menunjukkan waktu yang lebih pendek bagi pola aliran yang mempengaruhi Tw. Selanjutnya, hasil analisis menunjukkan pola aliran yang berbeda, digambarkan oleh karakteristik loop histeresis antara Qs dan Tw di DAS menengah selama periode hujan. Perbedaan-perbedaan dalam loop histeresis dapat dijelaskan sebagai perbedaan Tw dan kecepatan respons terhadap curah hujan antara aliran permukaan/aliran bawah permukaan dan aliran air tanah.]]>
<![CDATA[RANCANGAN SENSOR PERGESERAN TANAH BERBASIS SERAT OPTIK UNTUK DETEKSI LONGSOR: STUDI AWAL (Measurement of Curvature Optical Fiber Loss As A Displacement Sensors In Landslide Detector) ]]>
<![CDATA[Wildan Panji Tresna]]>;
<![CDATA[Dwi Hanto]]>;
<![CDATA[Bambang Widiyatmoko]]>
<![CDATA[ Widyariset Vol 13, No 3 (2010): Widyariset ]]>
Publisher : <![CDATA[Pusbindiklat - LIPI ]]>
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DOI: 10.14203/widyariset.13.3.2010.117–121
<![CDATA[The optical extensometer based optical fiber have been designed by Single Mode Optical Fiber with the basic component are light, optical fiber in circling condition and photodetector. Early experiment have been carried out loss optical fiber curvature of the correlation factor of a circle diameter of the displacement. Measurement results showed differences to laser intensity at the position of the optical fiber is straight and the position make to curve. Measurement made on the condition R1 = 18.7 mm as L1 = 0 mm until R2 = 15.6 mm as L2 = 9 mm. The working principles of equipment that is create when a laser through optical fiber missed in the curve and pull up to a certain frictions the loss geometry would be the bigger.]]>
<![CDATA[PERBANDINGAN LUARAN MODEL GLOBAL ATMOSFER CCAM dan GFS di wilayah INDONESIA DAN SEKITARNYA ]]>
<![CDATA[Donaldi Sukma Permana]]>
<![CDATA[ Widyariset Vol 13, No 3 (2010): Widyariset ]]>
Publisher : <![CDATA[Pusbindiklat - LIPI ]]>
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DOI: 10.14203/widyariset.13.3.2010.51-57
<![CDATA[The aim of this research was to compare Conformal Cubic Atmospheric Model (CCAM) and Global Forecast System (GFS) prediction against GFS initial condition as control up to 7 days in the future over Indonesia and northern subtropical regions of Indonesia in September – October – November (SON) 2008. Comparison was conducted in spatially to observe the similarity pattern by calculating spatial correlation value for some basic parameters in several pressure vertical levels. The result described that output of both models showed general similarity pattern in SON 2008 over Indonesia and northern subtropical regions of Indonesia, obtained spatial correlation values indicated GFS prediction was slightly better compared by CCAM prediction. For some parameters, CCAM output showed a particular problem in low-pressure vertical level (250mb). There was probably a problem with the vertical interpolation of the GFS initial data onto the CCAM conformal-cubic grid.]]>
<![CDATA[RESPONS BAWANG MERAH TERHADAP PEMUPUKAN ORGANIK DI LAHAN KERING (Respond of Onion to Organic Fertilizer in Dry Land) ]]>
<![CDATA[I Nyoman Adijaya]]>
<![CDATA[ Widyariset Vol 13, No 3 (2010): Widyariset ]]>
Publisher : <![CDATA[Pusbindiklat - LIPI ]]>
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DOI: 10.14203/widyariset.13.3.2010.87–91
<![CDATA[Onion demand in Bali is supplied from other provinces in about 40%, therefore onion is one of prospective commodity to be developed in Bali. An assessment on respond of onion to organic fertilizer was done in Sanggalangit Village, Gerokgak District, Buleleng Regency of Bali Province from July to September 2008. The trial was designed using Randomized Complete Block Design with 5 replications. Fertilization treatments tested were RB 10 t ha-1, cow urine 15,000 l ha-1, combination of RB 5 t ha-1 + cow urine 7,500 l ha-1, and without fertilizer as control. Organic fertilizer could improve physical character of the soil in term of decrease bulk density from 1,149 g cm-3 to 1.111 g cm-3–1.085 g cm-3 and improve growth and yield of onion. Onion yield significantly increased 32.71%–60.77% compared to control. Utilization of organic fertilizer, RB and cow urine, which will applied either singly or combination can improve physical character of the soil and increase the yield of onion.]]>
<![CDATA[DAMPAK ALIH FUNGSI LAHAN TERHADAP KEBERLANJUTAN SUPLAI AIR DI WADUK SUTAMI, MALANG, JAWA TIMUR ]]>
<![CDATA[M. Luthful Hakim]]>
<![CDATA[ Widyariset Vol 13, No 3 (2010): Widyariset ]]>
Publisher : <![CDATA[Pusbindiklat - LIPI ]]>
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DOI: 10.14203/widyariset.13.3.2010.27-34
<![CDATA[The research about impact of landuse change from forest become the non-forest in watershed of Upstream Brantas on decreasing water supply in Sutami Dam have been done. The objective of this research were: 1) to study impact of landuse change from forest become the non-forest (shrubs, farm/garden, or urban) on water supply sustainability in Sutami Dam, and 2) to determine an optimal landuse of forest on water supply sustainability. The location of research site is on watershed of Upstream Brantas, Malang, East Jawa. The methods of data analysis were: 1) analysis of landuse type, 2) analysis of hydrology, 3) model accuration testing, and 4) optimation of landusearea and position on decreasing runoff discharge and increasing baseflow discharge. The result showed landuse change from forest become the non-forest during 6 year (1997-2003) a significant impact on water production decrease in Sutami Dam (increasing runoff discharge 79% and decreasing baseflow discharge 90% compared to year 2001. The optimal landuse of forest area to sustainability of water supply was 43%.]]>
<![CDATA[RANCANG BANGUN SISTEM OKSIDASI LAPISAN TIPIS SEMIKONDUKTOR OKSIDA LOGAM UNTUK SENSOR GAS CO ]]>
<![CDATA[Bambang Herlambang]]>
<![CDATA[ Widyariset Vol 13, No 3 (2010): Widyariset ]]>
Publisher : <![CDATA[Pusbindiklat - LIPI ]]>
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DOI: 10.14203/widyariset.13.3.2010.123–133
<![CDATA[In this research, manufacture of oxidation system for oxidation process of metal thin film has been done. This process is required to obtain metal oxide semiconductor which can be used as CO sensor. The system comprises furnace, temperature sensor, temperature controller, O2 gas tube, and flow meter. The system developed was then tested to know its performances by observing its temperature conditioning and controlling ability the furnace. The data processing results show that the value shown by the K thermocouple and digital temperature transducers can be stated with equation y = 0.9974x – 1.4339 where x is the value shown by type K thermocouple and y is the value shown by digital temperature transducers, while standard error is 2.24%. X-Ray analysis on Sn thin film samplesthat were oxidized for 12 and 24 hours at 400°C show that SnOx contents increase with increasing of oxidizing duration. Samples oxidized for 24 hours has little increasing of SnOx content than sample with oxidation for 12 hours due to oxidation saturation occurred on thin film surface.]]>
<![CDATA[PENGARUH KARBON MONOKSIDA TERHADAP OZON PERMUKAAN ]]>
<![CDATA[Novita Ambarsari]]>;
<![CDATA[Ninong Komala]]>;
<![CDATA[Afif Budiyono]]>
<![CDATA[ Widyariset Vol 13, No 3 (2010): Widyariset ]]>
Publisher : <![CDATA[Pusbindiklat - LIPI ]]>
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DOI: 10.14203/widyariset.13.3.2010.59-64
<![CDATA[Surface ozone is one of air pollutant that can be very dangerous for human health and many other aspects of the living things. The effect of carbon monoxide (CO) to surface ozone formation has been studied. We used Dasibi Monitor Ozone and Horiba Ambient Carbon Monoxide Monitor to measure surface ozone and carbon monoxide concentration at air pollution monitoring station belong to LAPAN Bandung along 2008. The result shows that carbon monoxide affecting 20%–80% formation of surface ozone with negative correlation. A normal photochemical reaction is the main factors. Daily variation of surface ozone shows lower concentration occur in the morning and night, and higher concentration occur in the evening. While, daily variation of CO shows maximum concentrationin the morning and night, and lower in the evening.]]>
