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Widyariset
Published by Pusbindiklat Peneliti LIPI
ISSN : -     EISSN : 24610976     DOI : 10.14203
Core Subject : Science, Engineering,
Aerospace Engineering Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Immunology & microbiology Industrial & Manufacturing Engineering Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Neuroscience Physics
Widyariset is a scientific journal which publishes the results of research and development, assessment, and systematic thinking about Natural Science.
Arjuna Subject : Umum - Umum
Articles 476 Documents
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RESISTENSI PLASMA NUTFAH IRRDB 1981 TERHADAP PENYAKIT GUGUR DAUN Corynespora Alchemi Putri Juliantika Kusdiana; Fetrina Oktavia
Widyariset Vol 17, No 2 (2014): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.17.2.2014.175-181

Abstract

Leaf fall disease caused by Corynespora casiicola can damage the rubber resulting in considerable economic losses. The opportunities to get rubber plant genetic resources that are resistant to leaf fall disease Corynespora casiicola have been made   by testing the resistance of some germplasm IRRDB 1981. Testing the resistances of some germplasm is to produce genetic resources that are resistant to leaf fall diseases and used as parents in the crossing. Testing was done by using immersion leaves method in a solution of toxin C. casiicola. Resistance testing of 28 genotypes germplasm IRRDB 1981 showed various resistance responses. The results indicated that there were five genotypes that had moderate resistant which were PN 323, PN 333, PN 448, PN 494, and PN 593, and one genotype PN 235 showed highly resistant. The six genotypes needed to be tested in the field to determine their interaction with the environment and then used as cross parents to obtain resistant parentage to C. casiicola leaf fall disease.
SYNTHESIS AND CHARACTERIZATION OF THERMO SENSITIVE POLYMER PNIPA FOR THERAPEUTIC RADIATION SOURCE Rohadi Awaludin; Herlina Herlina
Widyariset Vol 14, No 3 (2011): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.14.3.2011.607-614

Abstract

Synthesis of poly(N-isopropylacrylamide) (PNIPA) by free radical polymerization has been carried out. NIPA monomer was polymerized by free radical polymerization with the initiator of ammonium persulfate (APS) and tetramethylethylenediamine (TEMED). The purpose was to obtain PNIPA for the base-material of therapeutic radiation source.  Visual observations indicated that the polymer solution showed different properties at 35ºC. FTIR spectrum showed that infrared absorption peaks of the synthesized polymer were almost the same as PNIPA reported before. Viscosity measurement showed that there was a change of viscosity at temperatures of 30–35ºC. Viscosity of the solution increased dramatically with the increase of concentration. The maximum concentration of the polymer solution for radiation source was 5%.
DIVERSITY OF HERPETOFAUNA SPECIES AT THE SECTION I OF ALAS PURWO NATIONAL PARK , BANYUWANGI, EAST JAVA Bayu Wisnu Broto; Subeno Subeno
Widyariset Vol 15, No 3 (2012): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.15.3.2012.519–526

Abstract

The existence of herpetofauna at the Alas Purwo National Park has been neglected. It has been shown bythe lack of diversity data of herpetofauna in the National Park. This research was aimed to inventory and identifyof herpetofauna at Section I of the Alas Purwo National Park Management (SPTN I) for determination of thediversity level (H’). Evenness Index (E), and Simpson Domination Value (D) were used in this research Observationfound 4 families of amphibian with 1.486 samples and 7 families of reptile with 90 samples. SPTN I AlasPurwo National Park was considered as a medium level of diversity with 1.93 of H value. The research suggeststhat SPTN I belongs to a middle diversity level, middle evenness index, and relatively low domination value.
VARIABILITAS MUSIM HUJAN DI KABUPATEN INDRAMAYU Fierra Setyawan
Widyariset Vol 13, No 3 (2010): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.13.3.2010.71–76

Abstract

Indramayu District is located in northern part of West Java. It has two seasons, dry season and rainy season. In this research, wet and dry rainy season in Indramayu District was investigated by using Standardized Precipitation Index (SPI). And also by using wavelet power spectrum analysis was investigated some factors that influence rainy season in this area. It is found that monsoon circulation is a dominant circulation that causing dry season (March – November) and rainy season (December–February). In extreme condition, El Niño – Southern Oscillation (ENSO) contributes to variability of rainy season. Index Southern Oscillation (SOI) influences variability of rainy season. If negative SOI occurred, mostly part Indramayu District has drier rainy season and the opposite, the rainy season will be wetter if positive SOI occurred. Another phenomenon that influences to the variability of rainy season is Indian Ocean Dipole (Dipole Mode Index, DMI). Negative DMI brings more precipitation. On the other hand, positive DMI influences to less precipitation.
SUBSTITUTION OF PLANT UTILIZATION ON THE FOREST GARDENS OF MAIBRAT, WEST PAPUA Susan Salosa
Widyariset Vol 14, No 2 (2011): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.14.2.2011.333-342

Abstract

The dividing in many provinces in Indonesia including West Papua has affected those areas in mobilization of information within areas, infrastructure changing such as roads, bridges, buildings and offi ces. Migration of people is also contributed to local plants existing and appearing of invasive species in the community gardens. The local plants are becoming scarce and fi nally disappeared. The research was conducted by fi eld survey technique on three villages: Arne, Framu, and Sembaro in the district of South Sorong (recently become part of Maibrat district). Data were analyzed tabulation continued with SPSS and diversity index. The research shows that aboutnine spesies, seven are species of bete and two kinds of pumpkin, become extinct. On the other hand peanut andred onion become part of local community’s life.
KOLOIMBA MITH AND THE INCHES RELATIONSHIP IN TOLAKINESS PEOPLE Jamaluddin Muchtar
Widyariset Vol 16, No 1 (2013): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.16.1.2013.93-100

Abstract

Indonesian society is rich in myths. However, there are contradictory views among the people who believe and do not believe it. The uncertain truth of a myth followed by human fear of the truth of the myth itself. Myth is not just a mere story, but also cultural phenomenons, a product of human imagination, contain some meanings and social fact believed by the supporters. By taking a case study of Koloimba myth in Tolaki community, Southeast Sulawesi, the study aims to analyze (1) the structure of the myth miteme aspects, (2) the concept of incest in relation to Tolaki cultural myths. The research methods are the techniques of documentation, notes, and interviews. By using the paradigm of Lévi-Strauss’s structuralism, studies show 1. the relation structure Molowu myths and Saweringadi the social structure described through binary oppositions that contain specific messages with the Reject. for example, women><women, 2. the concept of incest in the myth that suggests ban Koloimba mate with a particular individual, is not accompanied by the recommendation, but rather emphasize aspects of the impact of an act that is considered taboo or abstinence done, particularly violations of the prohibition of incest. The results of this study suggest that myths are able deliver moral messages into simple language that guide behaviour and as a means of communication, and supporting the development of knowledge in society.
EFFECT OF NICKEL PULSED ELECTRODEPOSITION PARAMETERS ON DEPOSIT MICROSTRUCTURE AND CORROTION RATE AISI 410 Agnes Stephani; Soesaptri Oediyani; Yulinda Lestari; Efendi Mabruri
Widyariset Vol 4, No 2 (2018): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.4.2.2018.143-152

Abstract

Nickel pulse electrodeposition is one of the coating methods that used to increase the corrosion resistance and improve the mechanical properties. In this study, nickel was used as the anode and martensitic stainless steel 410 was used as the cathode. The solution used in the method of nickel pulse electrodeposition include nickel sulfate, nickel chloride, and boric acid. Pulse electrodeposition parameters are variation of duty cycle of 70, 80, 90% and frequency variations valued at 0.1, 1, 10, and 20 kHz. Temperatures used in research nickel pulse electrodeposition at 50 ° C, with a current density of 15 A / dm² and 18 minutes. The Scanning Electron Microscopy analysis determine the microstructure and grain size changes after a nickel pulse electrodeposition. The polarization test determine optimum rate of corrosion when 90 % duty cycle and 20 kHz frequency.
TEKNIK PEMODELAN 3D CITRA SATELIT LAPAN TUBSAT DENGAN VIDEOGRAMMETRI (Studi Kasus: Gunung Semeru) Atriyon Julzarika
Widyariset Vol 13, No 2 (2010): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.13.2.2010.107-113

Abstract

LAPAN TUBSAT imagery can be made in 3D model using Videogrammetry. These 3D model used stereo model concept, geodetic control network, and Kriging method. First, LAPAN TUBSAT imagery in the form of video wastaken in two photo which have 60% overlay to create a stereo model. It needs to correct geometrically these two photos. After making 3D model, then geodetic control network that has been made can get ground control points from SRTM30. Kriging method that was resulted from geodetic control network was useful for making 3D model. 3D model needs statistical tests, they are display (athwart profile) and also geo-statisticsl. Its vertical accuracy was 5–9 m for SRTM30 with range 26–35 m. The research result concluded that LAPAN TUBSAT 3D model was created by Videogrammetry.
POTENSI ANTIOKSIDAN DAN AKTIVITAS ANTIPROLIFERASI EKSTRAK KUNYIT PUTIH (Curcuma zedoaria Rosc.) PADA SEL HELA Saefudin Saefudin; Fauzia Syarif; Chairul Chairul
Widyariset Vol 17, No 3 (2014): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.17.3.2014.381-389

Abstract

The aim of this study is to determine the antioxidant potential and anti-proliferative activity of Curcuma zedoaria Rosc extract on Hela cells. Two types of materials, such as water and ethanol extracts, were tested at different dose levels (1, 5, and 10%). The potential of antioxidant extract was tested by observing the peroxide value (POV) and prophylactic properties of superoxide (SO). The effects of Cytotoxic extracts were tested by observing the anti-proliferative properties on Hela cell morphology. Results showed that both water extract and ethanol extract contain antioxidants with higher value of superoxide and peroxide than a-tocopherol. Antioxidant potential of Curcuma zedoaria extract is evidential at its high concentration of 10%, but is less significant at lower concentration of 1 and 5%, when compared to the potential of positive control (a-tocopherol) and negative control (non-extract mixture). Antiproliferative activity of Curcuma zedoaria extracts at low concentration (1 and 5%) is not effective. At high concentration of 10%, anti-proliferative activity is effective. Cytotoxic effect of water extract of the rhizome of Curcuma zedoaria at the concentration of 10% changes the Hela cell morphology, but not cell wall rupture. High concentration of ethanol extract causes Hela cells to change its shape, rupture the cell walls, and fragment the cells.
FLOWERING PERIOD OF THREE SPECIES OF PRUNUS COLLECTION IN CIBODAS BOTANIC GARDEN Suluh Normasiwi
Widyariset Vol 1, No 1 (2015): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.1.1.2015.%p

Abstract

This study aims to explore the flowering period of three species of Prunus collection in Cibodas Botanic Garden during the four-year period (time series 2009–2012). This flowering data is able to give an information about Prunus flowering ability, which later can improve the amount of Prunus collection through cross breeding and seed collection. Those three Prunus species are Prunus arborea, Prunus costata, and Prunus cerasoides. The result indicated that P.arborea has the rarest flowering cycle compares to other Prunus species On the other hand, P.costata has the most active flowering cycle, which is around 3–4 times/year and it is often followed by development of fruit set and seeds, and P.cerasoides flowering cycle is twice a year, but it is rarely followed by seeds development. The current habitat is more suitable for P. arborea’s flowering and fruiting initiation than for the other two Prunus’. Light intensity induced flowering initiation, while fruit and seed development were influenced by rainfall, air temperature, and other factors such as pollinator.  

Page 41 of 48 | Total Record : 476

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