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<![CDATA[STABILITY OF LIPASE ENZYME IN THE SYNTHESIS OF MONOACYLGLYCEROL A DERIVATIVE VEGETABLE OIL PRODUCT ]]>
<![CDATA[Prima Luna]]>
<![CDATA[ Widyariset Vol 15, No 3 (2012): Widyariset ]]>
Publisher : <![CDATA[Pusbindiklat - LIPI ]]>
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DOI: 10.14203/widyariset.15.3.2012.673–682
<![CDATA[Nowadays, the biotechnologically production of products using enzymes has received great considerationbecause the trend towards ecologically acceptable processes or environmentally safer. The employment of lipaseas a biocatalyst in the synthesis of monoacylgliserol (MAG) allows mild reaction conditions and easy recoveryof glycerol without purification or chemical waste production. Biocatalyst in this study was commercially immobilizedlipase from Candida antarctica. Aim of this study was to investigate the stability of commercially lipaseimmobilized enzyme in the synthesis of MAG, to understand the correlation between parameters, and to estimatethe half-life of enzyme activity. Immobilized lipase enzyme was employed in the synthesis of MAG, respectively.The re-use of this enzyme has given importance information for oil and fat’s biotechnological industries. Based onthe research results, the composition of MAG for 10 times reaction, respectively, decreased 7%, while the MAG’syield and the number of products decreased 16%. The correlation between the composition of the MAG and theyield were strong and in the same direction with r = 0,812. The half-life of immobilized lipase enzyme activity inthis study was estimated 30 times in the MAG synthesis‘s cycle due to the composition of MAGs.]]>
<![CDATA[IDENTIFYING PRECURSOR CONDITION FOR “PUTING BELIUNG” EVENT IN PANGKALPINANG ]]>
<![CDATA[- Siswanto]]>;
<![CDATA[- Supari]]>
<![CDATA[ Widyariset Vol 15, No 3 (2012): Widyariset ]]>
Publisher : <![CDATA[Pusbindiklat - LIPI ]]>
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DOI: 10.14203/widyariset.15.3.2012.599–610
<![CDATA[This paper discusses an effort to identify the precursor condition for “puting beliung” or tornado-like eventwhich was occured in Pangkalpinang town on January 9, 2008. The analyses has been done based on the dynamicpipe effect of tornado genesis theory. Several data obtained from surface observation as well as the advantage ofsatellite data image were used to identify signal of presence of puting beliung. The result indicates that the putingbeliung event was triggered by the presence of low level wind shear which was supported by favorable surfacecondition such as the existing of enough water vapor aloft indicated by high relative humidity, enough surfaceheating to initiate a rapid cooling of the atmosphere to produce deep convection, and there is an initiation of alocal anomaly surface wind speed to produce low level wind shear. Revealed surface precursor for puting beliungin Pangkalpinang are the rapid increasing the relative humidity one hour in advance, together with rapid drop intemperature and the presence of “horn-like” pressure anomaly.]]>
<![CDATA[AN ASSESSMENT OF THE EFFECT OF RAIN CHARACTERISTICS AGAINSTS THE VOLUME OF WATER FLOW AND THE WEIGHT OF SUSPENSION IN KARST AREA ]]>
<![CDATA[Marcellinus Mandira Budi Utomo]]>;
<![CDATA[Hatma Suryatmojo]]>;
<![CDATA[Sri Astuti Soedjoko]]>
<![CDATA[ Widyariset Vol 15, No 3 (2012): Widyariset ]]>
Publisher : <![CDATA[Pusbindiklat - LIPI ]]>
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DOI: 10.14203/widyariset.15.3.2012.527–534
<![CDATA[The watershed management needs data of hydrology circulation, e.g. volume of water flow and weight ofsuspension. Rain is a main control for hydrology circulation. Rain characteristics need to be assessed for their effectagainst hydrology circulation. This research was aimed to assess the effect of rain characteristics and to createan equation of volume of water flow and weight of suspension in karst area. A combination method of explorationand statistic calculation was used in this research. Parameters of volume of water flow and weight of suspensionwas measured at several different of water levels. The data were analyzed to assess the rain characteristics thatinfluenced hydrology circulation. The result showed that 30 minutes maximum intensity (I 30’) affected the volumeof water flow and weight of suspension. The functions raised from this research were V = 563.646 (I 30’ )–644.063and W = 59.660 (I 30’ )–209.758.]]>
<![CDATA[GROUNDWATER LEVEL FLOW MAPPING IN VICINITY OF PROPOSED JATIGEDE DAM ]]>
<![CDATA[Yan Adhitya Wesda Wardhana]]>;
<![CDATA[Heni Rengganis]]>
<![CDATA[ Widyariset Vol 15, No 3 (2012): Widyariset ]]>
Publisher : <![CDATA[Pusbindiklat - LIPI ]]>
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DOI: 10.14203/widyariset.15.3.2012.645–650
<![CDATA[Jatigede Dam development that aims to tackle the water problems that exist in West Java of great importance.Positive impact arising from development of this Dam is rising shallow groundwater at the dug wells population.To prove this, needs to be monitoring of shallow groundwater in the area around the pool area will Jatigede Dam.This monitoring has been ongoing since the year 2008 up to this time, either during the rainy season and dryseason. This study aims to determine fluctuation of shallow groundwater in the wet season and dry before the damflooded, while also to know the flow of shallow groundwater through contour mapping shallow groundwater. Theresults obtained in the form of shallow ground water level fluctuations from 2008 through 2011, and map the flowof groundwater. Advance groundwater monitoring will be carried out until the reservoir is filled with water thatplanned in 2013.]]>
<![CDATA[COMPATIBILITY OF CHARACTERISTIC OF HYDROLIC RAM PUMP AND RAIN HARVEST TECHNOLOGY WITH LOCAL CHARACTERISTICS IN ENDE REGENCY, EAST NUSA TENGGARA ]]>
<![CDATA[Made Widiadnyana Wardiha]]>;
<![CDATA[Pradwi Sukma Ayu Putri]]>;
<![CDATA[Iwan Suprijanto]]>
<![CDATA[ Widyariset Vol 15, No 3 (2012): Widyariset ]]>
Publisher : <![CDATA[Pusbindiklat - LIPI ]]>
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DOI: 10.14203/widyariset.15.3.2012.565–576
<![CDATA[A study about compatibility of characteristic of hydraulic rams (hidram) pump and rain harvest with localcharacteristics (location and society) in Ende Regency, East Nusa Tenggara, has been done. Data includingsecondary data such as characteristic of hidram pump and rain harvest, and primary data from questionnaire.The respondent are from stakeholders in Ende Regency such as public works department, regional company forwater supply (PDAM), regional agency for development planning (Bappeda), and water supply consultant. Dataanalysis was using descriptive analysis. Compatibility of technology application is seen in the aspect of needs,society empowerment, energy saving, cost, social, and cultural at Ende Regency. The study result showed thathidram pump technology compatible to be applied in Ende but needs to be studied about material standard andmodification for increasing efficiency of hidram pump. Rain harvest technology can be applied at Ende but need amodification about disinfection and filtering process before consumed.]]>
<![CDATA[MODELING OF OIL SPILL ON MONTARA WELL HEAD PLATFORM IN THE TIMOR SEA ]]>
<![CDATA[- Lukijanto]]>;
<![CDATA[Andri Purwandani]]>
<![CDATA[ Widyariset Vol 15, No 3 (2012): Widyariset ]]>
Publisher : <![CDATA[Pusbindiklat - LIPI ]]>
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DOI: 10.14203/widyariset.15.3.2012.489-498
<![CDATA[Modeling of oil spill on Montara well head platform in the Timor Sea, with short-term period from August 20,2009 until January 5, 2010 has been conducted. The purpose of this study was to examine the pattern of the spreadof oil spills (the distribution, the areas of oil exposure, concentration of the oil spill and the time of exposure)which was a possible entry into the Exclusive Economic Zone (EEZ) of Indonesia. The results indicated that an oilspill scenario of 400, 1,500 and 2,000 barrels per day were obtained the maximum value of the oil concentrationof 54.0 ppm, 202.4 ppm and 270 ppm, respectively. The total area of oil spill exposure in EEZ of Indonesia wasabout 41,360 km2 with an average maximum area exposed for 2 hours and a maximum of 3:29 hours. Comparisonbetween the results of oil spill modeling with image analysis of Modis Aqua and Terra (SkyTruth) were obtainedthat the extent of distribution and movement patterns differ from one to another. Furthermore, the verification andvalidation of the modeling results with the field data are still required.]]>
<![CDATA[COMBINING ABILITY AND HETEROSIS OF CHILLI (Capsicum annuum) RESISTANCE TO ANTHRACNOSE ]]>
<![CDATA[Yulia Irawati]]>;
<![CDATA[Sriani Sujiprihati]]>;
<![CDATA[Widodo -]]>
<![CDATA[ Widyariset Vol 15, No 3 (2012): Widyariset ]]>
Publisher : <![CDATA[Pusbindiklat - LIPI ]]>
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DOI: 10.14203/widyariset.15.3.2012.683–690
<![CDATA[Anthracnose (Colletotrichum acutatum) is considered as the major disease in chilli. Resistant variety isimportant for controlling infection of disease, since fungicide application and other cultural controlled methodswere not effective. The aim of this research was to estimate combining ability and heterosis of chilli resistanceto anthracnose. Set population of half diallel crosses which involved 6 parents and 15 crosses with C. acutatumisolate BKT 04 were used in this experiment. Mature green fruit were inoculated using a microinjection method.Disease resistant percentage and lesion diameter were used for estimating of combining ability. Disease incidenceand lesion diameter were used for estimating heterosis. General combining ability of IPB C15 was high for diseaseresistance percentage and lesion diameter. Specific combining ability of IPB C15 x IPB C9 was high for diseaseresistance percentage and specific combining ability of IPB C15 x IPB C10 and IPB C4 x IPB C2 were high forlesion diameter. Negative heterosis was expected in disease resistance traits; IPB C15 x IPB C9 had negativeheterosis for disease incidence and IPB C10 x IPB C9 had negative heterosis for lesion diameter.]]>
<![CDATA[THE DYNAMICS OF ACTINOBACTERIA COMMUNITY DURING COMPOSTING ]]>
<![CDATA[Mukhlissul Faatih]]>
<![CDATA[ Widyariset Vol 15, No 3 (2012): Widyariset ]]>
Publisher : <![CDATA[Pusbindiklat - LIPI ]]>
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DOI: 10.14203/widyariset.15.3.2012.611–618
<![CDATA[The mesophilic, thermophilic, and maturation phases were recognized in the composting process. Temperaturechanges in the process influence the microbial communities in compost. Actinobacteria account for a largerpart of compost microbial population. The aim of this research was to study of Actinobacteria community duringcomposting of dairy-farm waste. Actinobacteria from the compost were isolated using selective media, starchnitratemedium and humic-acid+vitamins medium. The colour of colony and medium pigment were characterizedusing culture-dependent method. The results showed, total and resident Actinobacteria isolates from mesophilicphase is 29 and 24 isolates, 23 and 16 isolates from thermophilic phase, while 19 and 9 isolates from maturationphase. Twenty two isolates found in more than one phase. Thus, the dynamics of Actinobacteria was occurredwithin composting process.]]>
<![CDATA[CONFORMITY OF TELEVISION PRODUCT IN INDONESIA TO ELECTROMAGNETIC COMPATIBILITY STANDARD FOR RADIATED EMISSION TESTING PARAMETER ]]>
<![CDATA[Wisnu Ananda]]>
<![CDATA[ Widyariset Vol 15, No 3 (2012): Widyariset ]]>
Publisher : <![CDATA[Pusbindiklat - LIPI ]]>
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DOI: 10.14203/widyariset.15.3.2012.535–544
<![CDATA[Indonesia have not had regulations regarding Electromagnetic Compatibility (EMC) yet. But the conformityof electronic products, particularly television, on EMC standards is very important because the emission and immunityfactors of electronics products may affect human health and device performance. The undertaken activitieshere is an EMC testing for Radiated Emission parameter of 10 CRT TV’s and 3 LCD TV’s brands circulating inIndonesia. Test method and limit value used refers to the standard CISPR 13:2009 and done at the Laboratory ofElectronics and EMC Center for Material and Technical Products (B4T) Bandung from March to July 2011. Thepurpose of this activity is to provide an overview about conformity of television products in Indonesia against EMCstandard for Radiated Emission parameter. The results showed that only 3 brands of CRT TV and 1 brand of LCDTV conform to the standard CISPR 13:2009.]]>
<![CDATA[DRAG FORCE ANALYSIS OF EXTERNAL QUARK IN ROTATING AND STRONGLY INTERACTING QUARK GLUON PLASMA (QGP) USING STRING THEORY ]]>
<![CDATA[Ardian Nata Atmaja]]>
<![CDATA[ Widyariset Vol 15, No 3 (2012): Widyariset ]]>
Publisher : <![CDATA[Pusbindiklat - LIPI ]]>
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DOI: 10.14203/widyariset.15.3.2012.651–656
<![CDATA[In this paper, it is analyzed drag force of a quark in a rotating and strongly coupled Quark Gluon Plasma(QGP) by considering the motion of a string under background metric of rotating Banados-Teitelboim-Zanelli(BTZ) black hole. The non-trivial solution of string motion under rotating BTZ black hole depends on a constantmomentum conjugate which is fixed physically in all space. The drag force is characterized by the black hole’sparameters (curvature, mass and angular momentum) and angular velocity of the string. Moreover, it is also foundan external force term proportional to the angular momentum of the black hole in non-relativistic limit.]]>
