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Widyariset

widyariset
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Published by Lembaga Ilmu Pengetahuan Indonesia

ISSN : 14117932 EISSN : 24610976 DOI : -

Core Subject : Engineering,

Engineering

Widyariset is a scientific journal which publishes the results of research and development, assessment and systematic thinking about science and technology. The writers of the scientific papers in this journal come from researchers/researcher candidates from various institutions' research and development (R&D), and universities. Widyariset is published regularly three times a year: in April for the issue of Social Sciences and Humanities (IPSK), in August for the issue of Natural Sciences (IPA) and in December for the issue of Engineering Sciences (IPT).

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Articles 12 Documents

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Search results for , issue "Vol 1, No 1 (2015): Widyariset" : 12 Documents clear

EMBRYONIC AND EARLY LARVAE DEVELOPMENT OF WILD BETTA (Betta imbellis LADIGES 1975) Sawung Cindelaras; Anjang Bangun Prasetio; Eni Kusrini
Widyariset Vol 1, No 1 (2015): Widyariset
Publisher : Pusbindiklat - LIPI

Cupang (Betta imbellis) is a popular ornamental and fighting fish in Indonesia. Its popularity is not followed by its scientific information. The aim of this study was to explore the embryonic stages and early larva development. This information is needed for fish breeding. Total of 20–40 eggs and larvae were observed under a microscope with 40 and 100 magnifications. Eggs were observed every cleavage stage and larvae were observed every 12 hours. Fertilized eggs were seen translucent with dark yolk egg in a diameter of 1.09±0.04 mm. Cleavage stages occurred during 4–55 minutes after fertilization. Larvae hatched ±29 hrs after fertilization.The length of hatched larvae was 2.42 ±0.076 m, while yolk volume was 0.11 ±0.028 mm2. Larvae became free-swimming in 2-3 days and yolk were fully absorbed in 3–4 days after hatching and started to eat. The cleavage stage occurs for 55 minutes after fertilization and becomes foraging with a size of mouth opening 0.31±0.005mm which could consume nauplii ofArtemiasp.

ACIDITY AND ALKALINITY LEVEL OF MAYAN BAMBOO ACTIVATED CHARCOAL (MBAC) ON SATURATED VAPOR OF ACID CHLORIDE AND NATRIUM HYDROXIDE Novitri Hastuti; Gustan Pari; Dadang Setiawan; Mahpudin Mahpudin; Daud Mulia Godang
Widyariset Vol 1, No 1 (2015): Widyariset
Publisher : Pusbindiklat - LIPI

The use of a strong acid and alkali gives some disadvantages such as large volume, needs washing process and expensive in cost. The use of activated charcoal as a solid catalyst has grown but its adsorption performance can be affected by the activation process. This study aimed to characterize Mayan bamboo activated charcoal/MBAC (Giganchlotoa robusta Kurz). Carbonization was carried out at temperature 500°C for 4-5 hours. The charcoal was activated by steam at temperature 800°C for 60 minutes and 90 minutes. Activated carbon from Mayan bamboo tested for its acidity and alkalinity by saturated vapor of HCl and NaOH in a desiccator for 5 days. Characterization of Mayan bamboo activated showed that the moisture content, ash content, volatile matter and fixed carbon met the Indonesian standards (SNI 06-3730-1995). For adsorption capacity of iodine only MBAC in activation time, 90 minutes met Indonesian standard. The crystallinity of MBAC in activation time 90 minutes is 47.58% higher than MBAC in activation time 60 minutes about 25.65%. Adsorption of saturated vapor of HCl and NaOH showed MBAC in activation time 60 minutes is more acidic whereas MBAC in activation time 90 minutes is more alkaline. MBAC is can be used as a solid catalyst for various applications.

KUMPULAN ABSTRAK BAHASA INGGRIS Abstrak Inggris
Widyariset Vol 1, No 1 (2015): Widyariset
Publisher : Pusbindiklat - LIPI

[DETERMINATION ON MATURITY LEVEL OF SALAM (Syzygium polyanthum (WIGHT) WALPERS) FRUIT FOR SEEDLING USING GERMINATION TEST AND SEED VIGOR] Ninik Setyowati; Ahmad Fadli
Widyariset Vol 1, No 1 (2015): Widyariset
Publisher : Pusbindiklat - LIPI

Study on the determination of the maturity level of salam (Syzygium polyanthum (Wight) Walpers) fruit for seedling with germination test and vigor of seed was conducted at Macropropagation Laboratory, Research Centre for Biology, Cibinong Science Center. The experiments were carried out in 3 stages i.e. stage-1, observation of morphological and anatomical characteristics of fruits and seeds. Stage-2, determine of seed germination percentage on 3 levels of fruit maturity. Stage-3, determine of seedling vigor in 3 level of fruit maturity. There were arranged with a Completely Randomized Design. The results showed that there were 3 levels of fruit maturity of Syzygium polyanthum based on morphological of skin color i.e. pre-ripe (reddish green), ripe (red) and after-ripe (red-black). In general, the morphological characteristics of fruits and seeds of ‘salam’ was not different i.e. the fruit is globular buni, slick texture; and the seeds is oval, soft texture, the location of ‘hilum’ at the end, elongated shape, the color is white, position concave. The color of the endosperm is green, the embryo located at the base, and the color is green. However, different in size, the more mature fruit, the larger diameter (8.0-13.7) mm, thick meat (1.0-2.4) mm, as well as the diameter of seed, either cross-sectional (3,2-8.0) mm and longitudinal (3.9-10.1) mm. The seeds germinate quickly, on day 2 already germinated 10-20%, on day 7 reaches 80-95%. The percentage of seed germination at pre-ripe fruit showed the highest (93.33%), the highest germination rate, the most rapid germination rate (3.83 days), also the highest germination value (226.67) than the other. There for, it was recommended for the harvesting of fruit on the pre-mature level, with the color fruit of reddish green.

DETERMINATION OF OIL EXTRACTION RATE FROM Spirulina sp. AND Chlorella sp. BY USING CELL DISRUPTION TECHNIQUE Susiana Melanie; Diini Fithriani
Widyariset Vol 1, No 1 (2015): Widyariset
Publisher : Pusbindiklat - LIPI

Oil derived from microalga has a big potential to substitute fossil fuel so that the oil extraction method needs to be developed. This study aims to compare the method for cell disruption in oil extraction of Spirulina sp. and Chlorella sp. microalgae. Spirulina sp. and Chlorella sp. were cultivated each in a pond with maximum capacity of 600 liters at Biotechnology Laboratory of Research and Development Center for Marine and Fisheries Product Processing and Biotechnology. Spirulina sp. were harvested by filtered it using satin. Chlorella sp. was harvested using coagulant NaOH, so it was needed to be neutralized to pH 7 with citric acid addition. The cell wall of Spirulina sp. and Chlorella sp. then was ruptured using sonicator and microwave, while other sample without disruption as control. The suspension then was macerated with n-hexane solvent, to extract the oil content. Oil content of Spirulina sp. which has been collected from this experiment gave result control: microwave: sonicator as 1.17%, 1.28%, and 1.97% respectively. Meanwhile, oil content of Chlorella sp. gave result from control, microwave, and sonicator as 0.93%, 1.20%, and 1.69% respectively. It was concluded that sonicator is the best method in oil extraction of cultured microalgae.

KUMPULAN ABSTRAK BAHASA INDONESIA Abstrak Indonesia
Widyariset Vol 1, No 1 (2015): Widyariset
Publisher : Pusbindiklat - LIPI

SEAGRASS ECOSYSTEM IN THE COASTAL AREA OF SOUTHERN KEI BESAR DISTRICT, SOUTHEAST MALUKU REGENCY, PROVINCE OF MALUKU, INDONESIA Marsya Jaqualine Rugebregt
Widyariset Vol 1, No 1 (2015): Widyariset
Publisher : Pusbindiklat - LIPI

The aims of this research were to determine the seagrass bed coverage and its ecosystem condition. The research result obtained ten seagrass species, those are Cymodocea serullata, Cymodecea rotundata, Syringodium isotefilium, Halophila ovalis, Halophila minor, Enhalus acroides, Halodule pinifolia, Halodule uninervis, Thalassia hempirichii, and Thalossodenron ciliatum. The biggest percentage of seagrass coverage was found in Tamangil Nuhuten (50,75 %), followed by Tamangil Nuhuyanat (62,61%), Soindrat (51,53%), Ngafan (58,70%), dan Tutrean (57,15%).Water quality of this area was good for the life of seagrass.

PERFORMANCE DIAGNOSIS OF SEPTAGE TREATMENT PLANT Reni Nuraeni; Fitrijani Anggraini
Widyariset Vol 1, No 1 (2015): Widyariset
Publisher : Pusbindiklat - LIPI

The sanitation development target that everybody has access to sanitation infrastructure has not fulfilled yet, and only 65% of 146 units of septage treatment plant operated well. These conditions need to be improved and the first thing to do is analysing existing condition and composing scientific information as a reference for implementation. The aim of this research is to map the condition and management status of septage treatment plant system in 8 cities selected. This research was conducted by assessing the content of septage treatment technologies using technology atlas approach, which consists of elements technoware, humanware, infoware and orgaware. Mapping carried out on two types of septage treatment plant, that uses Imhoff tank and Anaerobic Baffle Reactor (ABR). Mapping was also conducted on the status of rehabilitation and operational conditions for each septage treatment plant.The results of this study concluded that the sophistication level of septage treatment technology is a medium category with coefficient contribution is 50%. Operational conditions of septage treatment plant is almost optimum with the ability of septage processing is 54%. A recommendation to increase the performance of septage treatment plant are : improving septage supply, improving the maintenance quality of processing units, improving SOP quality, sharpening tasks and responsibilities as well as improving human resource competencies.

THE NONMETALLIC COMPONENTS IMMERSION TEST OF THE FUEL LINE SYSTEM OF MOTOR VEHICLES WITH BIOSOLAR (B5) Emi Yuliarita
Widyariset Vol 1, No 1 (2015): Widyariset
Publisher : Pusbindiklat - LIPI

Biodiesel is a renewable alternative energy has now been used widely. The use of biodiesel in diesel fuel vehicles is the hope of anticipating the needs of increasing diesel oil. This is consistent with the national energy policy where the energy mix by 2025 is expected to use alternative energy can reach 25%. However, biodiesel has solvent properties as a good enough so that it will be able to influence the non-metallic components of the fuel line system of motor vehicles. In this study conducted immersion test against non-metallic components of the fuel line system of motor vehicles Isuzu Panter which refers to the test method SAE 1747 with the aim to see the nature of the fuel compatibility with the non-metal components. After soaking material characterization tests performed by measuring the volume and weight. The results showed that the use of 5% biodiesel in diesel fuel cause nonmetallic components undergo expansion/swelling and contracts in particular rubber, plastic, and cork. The biggest change occurred shrinkage of 71.4% on the rubber cap tank-solar, Rubber Tank Low – Solar is 28.6% and the Rubber Tank Up-Solar is 25.5% respectively in the phase after 100 hours of immersion.

RELIABILITY EVALUATION OF COMPOSITE STANDARD BRIDGE USING VEHICULAR WEIGH-IN-MOTION MEASUREMENT DATA Widi Nugraha; Setyo Hardono
Widyariset Vol 1, No 1 (2015): Widyariset
Publisher : Pusbindiklat - LIPI

The Bina Marga standard bridge has been implemented as bridge designing references in Indonesia. One of the standard bridge types is a composite bridge. This composite bridge is designed based on RSNI T-02-2005, an Indonesian bridge loading standard. This standard is based on Load and Resistance Factored Design (LRFD) method. LRFD method is treating statistical data on loads and strengths as random variables that have to be evaluated periodically using reliability index as the indicator. The purpose of this research is to evaluate the reliability of a 25 m simple span composite bridge structure due to statistical load data from weigh-in-motion (WIM) vehicular loads measurement in Pantura highway of Cikampek-Pamanukan, West Java in 2011 and RSNI T-02-2005 nominal vehicular load. The results of this research are maximum bending moment due to RSNI T-02-2005 nominal vehicular load is 526.55 kNm with a probability of exceedance of 4.5 x 10-7 and the reliability index of this composite bridge is 7.16, which is larger than reliability target of AASHTO of 3.50.

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Pusbindiklat Peneliti-LIPI (The National Training and Education Center for Researchers Development – Indonesian Institutes of Sciences) Jl. Raya Bogor Km. 46, Cibinong Science Center Cibinong - Bogor 16911

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widyariset@mail.lipi.go.id

Editorial Address
Pusbindiklat Peneliti-LIPI (The National Training and Education Center for Researchers Development – Indonesian Institutes of Sciences) Jl. Raya Bogor Km. 46, Cibinong Science Center Cibinong - Bogor 16911

Location
Kota adm. jakarta selatan,

Dki jakarta

INDONESIA