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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 17 Documents

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Search results for , issue "Vol 16, No 2 (2013): Widyariset" : 17 Documents clear

THE DESIGN AND TESTING OF ADSORPTION REFRIGERATION SYSTEM WITH TWO ADSORBERS Andi Taufan; Nasruddin Nasruddin
Widyariset Vol 16, No 2 (2013): Widyariset
Publisher : Pusbindiklat - LIPI

This paper discusses design and testing of adsorption refrigeration system with two adsorbers. Main components consisted of two adsorber with 6.6 kg solidified activated carbon inside, expansion valve, evaporator, condenser, and reservoir. All of that were connected with stainless steel pipes. The test performed for 75 minutes using 250 ml of methanol pro-analysis of 99.9% as a refrigerant in the system and the water temperature is 250C which is pumped through copper pipes to cool the adsorbents. The air pressure in the system during the test were in vacuum. The average pressure difference between the adsorber and the evaporator during testing was 4.6 cmHg. The lowest temperature was 140C obtained after the 65th minute.

EFFECTIVENESS OF COMPOST EXTRACT INDUCING SYSTEMIC RESISTANCE IN CIGAR TOBACCO PLANT AGAINST Cucumber Mosaic Virus (CMV) Abdullah Umar; Wiwiek Sri Wahyuni
Widyariset Vol 16, No 2 (2013): Widyariset
Publisher : Pusbindiklat - LIPI

Tobacco is a highly valuable commodity and Cucumber mmosaic vvirus (CMV) is an economically important disease. This study was aimed to determine the effectiveness of compost extract inducing systemic resistance in cigar tobacco against CMV. The experiment was arranged in a randomized block design (RBD) with two factors (5/K x2/V). K factor consisted of five types of three kinds of compost extract, Pseudomonas putida and control, while factor V consisted of 2 types of with or without virus inoculation. Each treatment was repeated 5 times. Its effectiveness was assessed by observing severity of the disease at 24, 27, 31, 36, 40, and 44 days after virus inoculation. The result showed that application of compost extract or P. putida Pf-20 on 15 days before inoculation of CMV could induce the systemic resistance of cigar tobacco and extended to the period of incubation up to 22 days. Rice straw compost extract was more effective than leaf litter compost extract or coffee husks. However, the indication effectiveness of those three extract were lower than P. putida.

EFFICACY OF MYCORRHIZAE AND Trichoderma AS A BIOLOGICAL CONTROL OF BASAL STEM ROT DISEASE (Ganoderma) AND AS A PROMOTOR OF OIL PALM SEEDLING GROWTH Donnarina Simanjuntak; Fahridayanti Fahridayanti; Agus Susanto
Widyariset Vol 16, No 2 (2013): Widyariset
Publisher : Pusbindiklat - LIPI

The experiment was in randomized block design which consisted of 14 treatments with 7 treatment combinations with Ganoderma infection and 7 treatment combinations without Ganoderma infections, there were 75 replications for each treatment combinations. The treatment combinations included applications of Mycorrhizae, Trichoderma, and standard fertilizer. Variables observed were disease incidence of Ganoderma, plant height, number of frond, and weight mass. The results showed that the application of Mycorrhizae was able to control basal stem rot disease until 7 months after the application of Ganoderma. A single application of Mycorrhizae had not been able to promote seedlings growth until 10 months. The role of Mycorrhizae in promoting seedling growth until 10 months was demonstrated when combined with Trichoderma and standard fertilizer application.

CARBONDIOXIDE SINK ABILITY OF 15 PLANT SPECIES COLLECTION IN BOGOR BOTANICAL GARDEN Masfiro Lailati Lailati
Widyariset Vol 16, No 2 (2013): Widyariset
Publisher : Pusbindiklat - LIPI

The increasing number of industries and motor vehicles has an impact in the increased concentration of carbondioxide in the atmospheree. This has been causing green house effects (global warming). Therefore, the availability is essential for absorbing carbondioxide in large capacity, both in forest areas as well as in large cities. The objective of this research is to measure carbondioxide sink ability of fifteen (15) species of local plants and to determine the effective in absorbing carbondioxide. Leaf of local plants collection samples were collected from the Bogor Botanical Garden. Carbohydrate analysis was done in the Laboratory Biokimia BB-BIOGEN Bogor, while stomata examination was done in Laboratory Kayu Solid IPB. The data obtained were analyized using carbohydrate mole comparation and linear regression. The highest sink ability was found for canary (12,638.453 g/hour) and the lowest was found for sandalwood (1.379 g/hour). Sink ability of the other species ranged between 131.244 g/hour and 11,461.506 g/hour.

THE POTENTIAL OF Paenibacillus spp. AS PLANT GROWTH PROMOTER IN TROPICAL PEAT ECOSYSTEM Andri Frediansyah; I Made Sudiana
Widyariset Vol 16, No 2 (2013): Widyariset
Publisher : Pusbindiklat - LIPI

Microbial activity in soil play key important role for maintaining ecosystem health. The objective of this research was to explore the potential of bacteria isolated from Kalampangan, Central Kalimantan tropical peat soil as biofertilizer agent. We found 4 isolates have ability to produce amylase and cellulose and have nirK gene as denitrify ability. Base on the 16S rDNA analyses and morphological observation, those bacteria were identified as Paenibacillus durum, Paenibacillus polymyxa, Paenibacillus macerans, and Paenibacillus azotofixans. P. polymyxa also can produce plant growth hormone (indole acetic acid), P. azotofixans contains ow gene indicating that the strain is able to solubilize calcium as well as alluminium phosphate. All strain excepted P. durum was also contains NifH gene indicating that this strain is able to fix N2. With these characteristics the fourth isolates of bacteria can be used as agents of biological fertilizers for peatland.

RESISTIVITY ANOMALY AT MOUNT KABA, BENGKULU, INDONESIA, AS INFERRED FROM GEOELECTRICAL INVESTIGATION Titi Anggono; Syuhada Syuhada; Bogie Soedjatmiko
Widyariset Vol 16, No 2 (2013): Widyariset
Publisher : Pusbindiklat - LIPI

Mount Kaba is a volcano located in the magmatic arc Bukit Barisan near the town of Curup, Rejang Lebong, Bengkulu, Indonesia. Two geothermal manifestations have been found in this region in form of hot springs at Suban Airpanas (50oC) and Sindangjati (37oC). Geoelectrical survey based on Schlumberger array up to AB/2 2,000 m was carried out in 2009–2011 in the surrounding area of Mt. Kaba. The aim of the investigation was to locate the distribution of low resistivity anomaly layer that may associate with hydrothermally altered subsurface rock in the area. It is estimated that the depth of low resistivity (< 5 ohm-m) found in the eastern part of Mt. Kaba is about 400 m.

PRODUCTIVITY EVALUATION OF RICE PROMISING LINES IN ORANSBARI DISTRICT, MANOKWARI REGENCY Fransiska Renita Anon Basundari; Abdul Wahid Rauf
Widyariset Vol 16, No 2 (2013): Widyariset
Publisher : Pusbindiklat - LIPI

Currently, the average of rice productivity in Manokwari only reached 4.3 ton ha-1. The rice varieties commonly planted in Manokwari are Ciherang, Mekongga, and Cigeulis, with the average productivity for each variety 3.87 ton ha-1, 4.01 t ha-1, and 4.11 t ha-1. The objective of the experiment was to obtain promising lines of rice which have high productivity (higher than 20%) of the current situation in Manokwari. The research was conducted in the District of Oransbari, Manokwari, West Papua in February until November 2010. It was arranged in Randomized Block Design, using four promising lines (RUTTST96B-15-1-2-2-2-1, BPT164C-68-7-3-2, RUTTSG-69-1B-1-1-3-2-1, IR71146-122-1-1-2) and four varieties of rice (Ciherang, IR64, Tukad Unda, and Memberamo) as a treatment, with three replications. The parameters observed include plant height, panicle number/clump, panicle length, yield, and the amount of filled grain. From the analysis, there were two promising lines namely BPT164C-68-7-3-2 and RUTTSG-96B-15-1-2-2-2-1. It showed the increasing of productivity about 36.27% and 52.09% from the current situation in Manokwari, and might be evaluated to be further developed in Oransbari District, Manokwari Regency.

THE EFFECT OF SANITATION LEVEL AND STALL MANAGEMENT SYSTEM TO SUPPRESS COCCCIDIOSIS CASES IN BALI CALVES (Case Study at Musi Village, Gerokgak District of Buleleng Regency) I Putu Agus Kertawirawan
Widyariset Vol 16, No 2 (2013): Widyariset
Publisher : Pusbindiklat - LIPI

This study was aimed to determine the effect of maintenance model to the incidence of coccidiosis desease in Bali calves at Musi Village, Gerokgak sub district of Buleleng Regency. The study involved 42 Bali cattle which consisted of 21 cows and 21 calves of Bali cattle. Those animal stall were divided into 3 groups of P0, P1 and P2. P0 groups did not adopt a healthy stall structure or termed as traditional rearing, with poor sanitation. P1 adopted a stall structure with a healthy level of sewage treatment plants with less sanitation. P2 groups adopted stall structures and sewage treatment plants healthy with good sanitation. Observed variables were the number of coccidiosis cases in calves of each group. Result showed that the case of calf coccidiosis in order from the highest incidence was 85.71%; 57.14% and 0% at the P0, P1 and P2 groups, respectively. This study indicates that good stall management suppresses the case of bovine calf coccidiosis in Bali cattle.

SOME POPULATION PARAMETERS OF BALI SARDINE (Sardinella lemuru) IN BALI STRAIT WATERS Arief Wujdi
Widyariset Vol 16, No 2 (2013): Widyariset
Publisher : Pusbindiklat - LIPI

Purse seine was introduced at 1972 in Bali Strait and since then Bali sardine fish (Sardinella lemuru) are the most widely exploited by fishermen in these waters. One of the largest landing site of Bali Strait purse seiner is in Muncar, East Java. This study aims to estimate population parameters of Bali Strait oil sardine that were caught by purse seine in Muncar. Data were collected from August 2010 to December 2011, and were analyzed using FISAT II (version 1.1.3). The results showed growth parameters were L∞ = 20.75 cmFL; K=1.20 year-1 and t0=0.1456 year. The results of Z=6.39 year-1; M=1.78 year-1; F=4.61 year-1; and E=0.65. The exploitation rate in this study was greater than the optimum exploitation (Eopt), indicating an overfishing had occurred. The recruitment pattern of Bali sardine had two peaks a year, in February and July, where the recruitment in July was greater than February.

COMMUNITY STRUCTURE OF MACROZOOBENTHOS IN SOUTH BIAK WATERS, BIAK, PAPUA Andriani Widyastuti
Widyariset Vol 16, No 2 (2013): Widyariset
Publisher : Pusbindiklat - LIPI

The existence of macrozoobenthos in an coastal waters, can be used as indicators the physical quality of water. The aim of this study is to analyze the diversity and community structure of macrozoobenthos in coastal waters of South Biak waters. Research was conducted in Maret-Nopember 2011, in the coastal waters of South Biak. Sampling using a transect quadrant. Macrozoobenthos samples was preserve in formalin solution 10% and was identified in the laboratory. The value of diversity, similarity and dominance will be calculated from the data, and its relationship with environmental factors. The results was found 101 species by 3572 the number of individuals who are scattered in four stations (Paray, Ambroben, Yenures, and Sorido stations). Makrozoobenthos types were found consisting of four phyla (Annelida, Arthropoda, Echinodermata and Mollusca) derived from 8 classes of Polichaeta, crustaceans, Ophiuroidea, Echinodermata, Holothuroidea, Amphineura, Gastropoda and Bivalves. Value index of diversity (H ‘) ranged between 1, 1354 to 2.8011, Paray and Sorido waters are not polluted waters, and waters Ambroben and Yenures is being polluted waters. Uniformity value (E) ranged from 0.3407 to 0.7666, indicating the existence of species that dominate (approaching 0) and shows the uniformity of all types in the population (approaching 1).

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Contact Name
-

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widyariset@mail.lipi.go.id

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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

Location
Kota adm. jakarta selatan,

Dki jakarta

INDONESIA