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Natural Science: Journal of Science and Technology
Published by Universitas Tadulako
ISSN : 25411969     EISSN : 23380950     DOI : -
Core Subject : Science,
Computer Science & IT
Jurnal Natural Science online diterbitkan oleh Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA) Universtas Tadulako. Jurnal ini menerbitkan artikel-artikel ilmiah hasil penelitian dalam bidang-bidang ilmu pengetahuan dan teknologi.
Arjuna Subject : -
Articles 11 Documents
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Search results for , issue "Vol 3, No 2 (2014): Volume 3 Number 2 (August 2014)" : 11 Documents clear
PENGGUNAAN PROTEASE DARI GETAH BIDURI DALAM PRODUKSI FLAVOR UDANG WINDU (PENAEUS MONODON) Hardi, Jaya; Diharnaini, Diharnaini
Natural Science: Journal of Science and Technology Vol 3, No 2 (2014): Volume 3 Number 2 (August 2014)
Publisher : Univ. Tadulako

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Abstract

Shrimp flavor including one of the high-value product that can be produced from the sap biduri protease activity. This research intends to know the concentration of biduri protease isolated and reaction times that result high-quality shrimp flavor. Achievement of objectives has been applied randomized block design with factorial treatment pattern that consists of two factors, namely the biduri protease concentration factor with three levels and hydrolysis time factor with three levels. Observed parameters include water content, soluble protein content and organoleptic quality of shrimp flavor. The results obtained indicate the concentration of biduri protease having an affect on the water content, soluble protein content and organoleptic quality, while the hydrolysis time having an affect only on the soluble protein content and organoleptic quality. The highest soluble protein content (71.65%) and the lowest water content (11.08%) was found in the combination of biduri protease concentration of 2.5% for 2 hours hydrolysis.
STUDI KEANEKARAGAMAN SPESIES NYAMUK ANOPHELES SP. DI KABUPATEN DONGGALA, PROVINSI SULAWESI TENGAH Fahmi, Mohammad; Fahri, Fahri; Nurwidayati, Anis; Suwastika, I Nengah
Natural Science: Journal of Science and Technology Vol 3, No 2 (2014): Volume 3 Number 2 (August 2014)
Publisher : Univ. Tadulako

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Abstract

The aim of this study is to determine the diversity of morphological and genetic variation of the Anopheles sp. This study was conducted in the periode of November 2013 - February 2014 in two (2) malaria endemic areas; Labuan Village, in North Donggala and Lalombi Village, in South Banawa of South Donggala Regency. Sample collection was done around cattle cage throughout the night between 18:00 to 6:00. The capture period was 15 minutes oh each, and it was done in every hour. The collection was done by using an aspirator and the sampel was stored in paper cup prior covered by gauze pads. Morphological identification of samples was performed at Entomology Laboratory, Vector Borne Disease Research and Development Unit Donggala. Identification was done based on O'connor and Soepanto (1981). Analysis of genetic was done by RAPD-PCR method. Morphological identification found that there were three (3) species of mosquitoes from the two (2) sites, namely An. tesselatus, An. subpictus, and An. vagus. The highest spesies diversity index obtained in the Lalombi village with H' = 1,07 and the lowest value in the Labuan village with a value of  H' = 0,33. RAPD analysis showed that there were similarity on DNA amplification band patterns on An. tesselatus from the village of Labuan  and it from  Lalombi. But interestingly, there were different on DNA amplification pattern of An. vagus from these two sites.  This  results indicating that the there was genetic variation on An. vagus from these two different villages, even though its have similarity in morphological characters.
KAJIAN PENGGUNAAN PENGKELAT UNTUK MENURUNKAN KANDUNGAN BESI DALAM MINYAK DAUN CENGKEH Saputri, Fatma; Razak, Abd. Rahman; Musafira, Musafira
Natural Science: Journal of Science and Technology Vol 3, No 2 (2014): Volume 3 Number 2 (August 2014)
Publisher : Univ. Tadulako

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Abstract

The investigation about study of the use of chelating agent to reduce iron content in clove oil has been done. This study aimed to determine the type of chelating agent that has the best ability in reducing the iron content in clove oil and to determine the optimum concentration of the chosen chelating agent in reducing the iron content in clove oil. Determination of iron content (Fe) was conducted using Atomic Absorption Spectrophotometry (AAS). The result obtained show that the type of chelating agent that has the best ability in reducing the iron content in clove oil was EDTA with 1,8% of the optimum concentration. It could reduced the iron content from 3,75 ppm to 0,625 ppm or approximately 83,333% of iron reduction.
KETAHANAN BUAH BEBERAPA KLON KAKAO (THEOBROMA CACAO L.) TERHADAP INFEKSI PENYAKIT BUSUK BUAH BERDASARKAN UJI DETACHED POD Aisyah, Nurul; Rahmansyah, Rahmansyah; Muslimin, Muslimin; Suwastika, I Nengah
Natural Science: Journal of Science and Technology Vol 3, No 2 (2014): Volume 3 Number 2 (August 2014)
Publisher : Univ. Tadulako

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Abstract

One target on Cacao breeding program is to develop superior clone which resistance against major pest and diseases. In present time, Pod Rot disease is one of serious problem on the Cacao plantation system, including over the area of Central Sulawesi. The aim of this study was to identifiy the resistancy on five different clones of cacao (ICCRI 1, ICCRI 3, ICCRI 4, Local Sidondo and Green Local Sausu) from local farming in Central Sulawesi against Phytophthora pot rot infection based on detached pod assay. Sample were collected from the farming area of Sigi Biromaru, Palolo, and Sausu, over the harvesting period of February - May 2014. Mature and healthy pods were detached from the plant, then artificially inoculated by using Phytophthora-infected pericarp. Pod rot symptom and spreading area of fungi  were observed dialy, then total area of  infection on day-6 was used as disease rating scale. The outcome data showed that all pod of the clones were classified as a highly susceptible clones against pod rot disease. However, pod resistance level of each clones were statisfically different. Green Local Sausu and Local Sidondo were more resistant than other clones.  This result suggesting that Local clones have been developing resistancy mechanism against Pod Rot disease.
KAJIAN WAKTU SIMPAN KAROTEN KAPANG ONCOM MERAH (NEUROSPORA SP) YANG DIPRODUKSI PADA MEDIA TONGKOL JAGUNG Kenyamu, Mardalena; Mappiratu, Mappiratu; Nurakhirawati, Nurakhirawati
Natural Science: Journal of Science and Technology Vol 3, No 2 (2014): Volume 3 Number 2 (August 2014)
Publisher : Univ. Tadulako

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Abstract

The investigation about study of the shelf lifeof red oncom mold carotene (Neurosporasp) from corn cob media has been done. This study aimed to determine the shelf life of red oncom mold carotene in capsules packaging at various storage temperatures. It was done by applying two phases of research i.e the production red oncommold and the determination of shelf life at the temperature of 50?C and 60?C. Carotene levels were determined using spectrophotometric method. The resultshowedthat carotene shelf life at a temperature of 50?C and 60?C were 44.31 and 34.05 daysrespectively. The Changed of carotene quality in capsule packaging followedthe zero-order kinetics. The calculation result shoewd Q10 value was 1.3 and the shelf life at variouse temperatures was determined based on the value of Q10. Storage at room temperature caused the shelf life for74.80 days.
PEMODELAN TUMPAHAN MINYAK DI TELUK LALONG KABUPATEN BANGGAI Sabhan, Sabhan; Mudin, Yutdam; Babanggai, Marianus
Natural Science: Journal of Science and Technology Vol 3, No 2 (2014): Volume 3 Number 2 (August 2014)
Publisher : Univ. Tadulako

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Abstract

Oil distribution  cause environmental problems that disrupt marine ecosystems and reduce the aesthetic value of coastal waters in Gulf  Lalong Banggai. The aims of this study to build a 2D hydrodynamics model to see the patterns  of water mass movement and models of oil spill distribution base on the hydrodynamic models in Gulf of Lalong Banggai Regency (0°57'17,3 "latitude and 122 ° 47'52 " E) with a potential spill, location, volume, and duration of discharge of oil spills. Based on the results of models oil spill distribution in Gulf Lalong Banggai such us waters prone to oil spills.
RASIONALITAS PENGGUNAAN ANTIPSIKOTIK PADA PASIEN SKIZOFRENIA DI INSTALASI RAWAT INAP JIWA RSD MADANI PROVINSI SULAWESI TENGAH PERIODE JANUARI-APRIL 2014 Fahrul, Fahrul; Mukaddas, Alwiyah; Faustine, Ingrid
Natural Science: Journal of Science and Technology Vol 3, No 2 (2014): Volume 3 Number 2 (August 2014)
Publisher : Univ. Tadulako

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Abstract

Schizophrenia is a severe mental disorder, that antipsychotics was effective therapy to treat it. There are 50 million sufferers in the world, 50% did not receive appropriate treatment and  90% of patients who did not receive the proper treatment  in developing country. This research is aimed to find out rationality of antipsychotic usage includes right indication, drug, patient, dosage, and frequency in Schizophrenia Patient Department of Mental health in Madani Hospital of Central Sulawesi, in the period of January-April 2014. This research is a descriptive study, prospectively done by collecting primary data which was observation and interview, and secondary data was from the schizophrenia patient medical record.  Data analysis was done by descriptive quantitative to provide an overview of the characteristic of each study variables including patient characteristic, clinical characteristic, and rational use of drug. The obtained results in rationality treatment was as follows : 100% precise indications, 90.4% right drug, 87.8% right patient, 81.6% right dosage and 90.4% appropriate frequency of antipsychotic use.  Antipsychotic usage in schizophrenia Patient at mental health department of Madani Hospital of Central Sulawesi cannot be stated as rational yet.
PENGARUH VARIASI EKSTRAK METANOL KULIT BUAH RAMBUTAN (NEPHELIUM LAPPACEUM L.) TERHADAP KESTABILAN FISIK KRIM ANTIOKSIDAN Syamsidi, Armini
Natural Science: Journal of Science and Technology Vol 3, No 2 (2014): Volume 3 Number 2 (August 2014)
Publisher : Univ. Tadulako

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Abstract

ABSTRACT A research on influence methanol extracts concentration of fruit peel rambutan (N. lappaceum L.), concerning physical stability of creams antioxidant had been done. This research aims to obtain an antioxidant cream formulation O/W type from rambutan fruit peel extracts and compares activity of the antioxidant cream with extract from fruit peel rambutan with using free radical 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenging activity. A total of 500 grams of fruit rambutan peel extracted with 80% methanol by maceration method and then extract obtained made antioxidant cream O/W type with the variation of the concentration of extract 1%, 2%, and 3% to the total weight of the cream. Evaluation of physical stability of creams includes organoleptic testing, creaming, viscosity testing and drop size of dispersed phase inversion before and after the storage conditions during the 12-hour accelerated alternately at 5°C and as many as 10 cycles of 35°C. Organoleptic observations show no change in color and odor on the third-cream formula. The research was used a completely randomized design and the data obtained were analyzed statistically distinguished by ansira on the confidence level. Statistical analysis shows that the concentration of rambutan fruit peel extracts give significant effect on the viscosity cream before and after accelerated storage conditions, while the size of the drops dispersed showed no significant effect. In this study, showed that no phase of inversion and creaming from all of cream. Formulation of skin creams with methanol extract of the fruit rambutan 1% cream can be categorized as the most stable, continuing antioxidant activity test showed that the cream with a concentration of extract 12,359 ppm, which inhibits 50% of free radicals.
OPTIMASI SINTESIS KARBOKSIMETIL SELULOSA DARI TONGKOL JAGUNG MANIS (ZEA MAYS L SACCHARATA) Melisa, Melisa; Bahri, Syaiful; Nurhaeni, Nurhaeni
Natural Science: Journal of Science and Technology Vol 3, No 2 (2014): Volume 3 Number 2 (August 2014)
Publisher : Univ. Tadulako

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Abstract

This research aimed to determine the best ratio and reaction time of synthesis of the carboxymethyl cellulose from sweet corn cobs to obtained the best subtitution degree. Treatment of ratio variation amount of sodium monocloroacetic consists of 6 levels i.e 5, 6, 7, 8, 9, and 10 grams, while treatment of synthesis reaction time consiste of 6 levels i.e. 1, 2, 3, 4, 5, and 6 hours. Optimum conditions of synthesis reaction of carboxymethyl cellulose from sweet corn cobs obtained at the addition of 7 grams sodium monocloroacetic and use 4 hours of reaction time. Carboxymethyl cellulose has subtitution degree 1,197 to yield 73,45% and water content 7,47%.
EKSTRAKSI PARAMETER ELEKTRONIK SEL SURYA ORGANIK DENGAN MODEL ELEKTRONIK DUA DIODA Sesa, Elisa; Ulum, Syahrul; Darwis, Darmawati
Natural Science: Journal of Science and Technology Vol 3, No 2 (2014): Volume 3 Number 2 (August 2014)
Publisher : Univ. Tadulako

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Abstract

The organic photovoltaic cells (OPV) characteristics depend on several factors, i.e.: device structure, morphology of the active layer, and the active materials.These characteristic can be varied due to the applied treatment in the fabrication. The characteristic variations of OPV can be observed through the electrical parameters. These parameters can be extracted from the I-V curve. The purpose of this paper is to show that the two-diode model accurately extract the electrical parameters of several I-V curves comparing to the one-diode model. The model is built using the MATLAB program. The simulation results is given the average correlation value (R2) is 0.999 which shows that the extracted electrical parameters is valid to be used in the further analysis.

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