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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 9 Documents
 1 
Search results for , issue "Vol 2, No 2 (2013): Volume 2 Number 2 (August 2013)" : 9 Documents clear
RANCANG BANGUN SISTEM KLASIFIKASI STATUS GIZI BALITA MENGGUNAKAN METODE K-NEAREST NEIGHBOR (KNN) Amalia, Rizki; Musdalifah, Selvy; Hendra, Andi; Sudarsana, I Wayan
Natural Science: Journal of Science and Technology Vol 2, No 2 (2013): Volume 2 Number 2 (August 2013)
Publisher : Univ. Tadulako

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Abstract

Children under five age is a group that susceptible to health problems such as lack of energy and protein nutrition, so this age group should get special attentions. One of the problems that should get an attention is problems nutritional status of children. Nutritional status of children is one of the indicators the level of social welfare. The classification of children?s nutritional status was conducted by nutritionist, but the problem is the scattering of nutritionist in Palu is very limited, especially in areas which far away from the city center. This case of study will be taken from Pantoloan Boya village. The limited of nutritionist was being the problems in detecting the indication of malnutrition. Through this research will be made an implementation based of computer system that has a same understanding as a nutritionist who is able to determine the nutritional status of children. One method that can be used in solving the classification of the nutritional status of children is K-Nearest Neighbor (KNN) method. K-Nearest Neighbor (KNN) is one method that use the learning algorithm where the result from the new testing sample is classified based on the majority of KNN?s category. In this research, the system classified the children according to their nutritional status based on data that obtained from the place of research. These results using k = 1 as the number of nearest neighbors which labels the majority of the k nearest neighbors are used to predict the unknown nutritional status of new data. This is because for k = 1 has better accuracy results than other values ??of k is equal to 81.67%.
AUTEKOLOGI NEPENTHES PITOPANGII LEE.DI KAWASAN TAMAN NASIONAL LORE LINDU SULAWESI TENGAH M. Saleh, Muhammad Fajrri Ramadhan; Miswan, Miswan; Pitopang, Ramdanil
Natural Science: Journal of Science and Technology Vol 2, No 2 (2013): Volume 2 Number 2 (August 2013)
Publisher : Univ. Tadulako

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Abstract

The growth and development of Nepenthes are affected by abiotic and biotic factors in its environment. In this study, to measure and to identify the abiotic and biotic factors surrounding the Nepenthes pitopangii Lee.naturally grow in the Lore Lindu National Park (LLNP) in Central Sulawesi.  The measurement of abiotic factor and the identification of biotic factor have been carried out from April to May 2013. The abiotic factors such as temperature and relative humidity were measured with thermometer and pscychrometer respectively. While, the precipitation data were obtained from Badan Meteorologi dan Geofisika Palu. Nitrogen and phosphorus concentrations of soil where N. pitopangii Lee grow were measured with metode khcelhal dan metode Bray-1.The plants which compose vegetation in the surrounding of Nepenthespitopangii Lee.were analyzed with systemic double plot method and than they were identified. The animals that affect Nepenthespitopangii Lee.growth were also identified. The results showed that in the LLNP, daily temperature, relative humidity and precipitation that affect Nepenthespitopangii Lee. growth were 17.1 °C, 90.2% and 313.3 mm respectively. Nepenthespitopangii Lee.can grow in the very low soil N and P concentrations. At tree level, vegetation was dominated by Helicia celebica Sleumer with importance value index (IVI) of 69.94%. Eurya accuminata DC. (IVI 59.92%) dominated vegetation at pole level, Xanthomyirtus angustifolius Scoot. (IVI 74.57%) dominated vegetation at sapling level, and Gleichenia truncata (IVI 44.43%) dominated vegetation at seedling level.  The wild animals are found in the study area to interacting directy on Nepenthes pitopangii Lee. inPolyrachis Sp, Camponotus Sp, Apidae Sp
KAJIAN ETNOBOTANI TUMBUHAN RITUAL SUKU TAJIO DI DESA KASIMBAR KABUPATEN PARIGI MOUTONG Rahyuni, Rahyuni; Yniati, Eny; Pitopang, Ramadhanil
Natural Science: Journal of Science and Technology Vol 2, No 2 (2013): Volume 2 Number 2 (August 2013)
Publisher : Univ. Tadulako

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Abstract

Ethnobotanic Study of Tajio Tribe Ritual Plants at Kasimbar Village, Parigi Moutong Regency was conducted from December 2012 until February 2013. The objective of this study was to know kinds of plants, meaning of them, and ways of taking advance of them by people of Tajio tribe. The research methods used were the combination between qualitative methods. They were observation, moderaate participatory, purposive sampling and snowball sampling, and 102 items of questionnaire for respondents. The plants were used for tradition ritual on Tajio tribe like wedding, house building, rice planting, birth and religious events. The result showed that based on the habitat, there were 7 species of trees, 3 clusters of clumps, 11 clusters of bushes, 16 categorized herbs and 4 kinds of categorzed lily used for the traditional ritual. In addition, based on parts of the plants, there were 8 species of roots, 15 species of stems, 15 species of leaves, 11 species of fruit, 5 species of flowers, 4 species of seeds, 3 species of tubers and 2 species of plant players.
ORGANOGENESIS TANAMAN BAWANG MERAH (ALLIUM ASCALONICUM L.) LOKAL PALU SECARA IN VITRO PADA MEDIUM MS DENGAN PENAMBAHAN IAA DAN BAP Rufaida, Anna; Waeniaty, Waeniaty; Muslimin, Muslimin; Suwastika, I Nengah
Natural Science: Journal of Science and Technology Vol 2, No 2 (2013): Volume 2 Number 2 (August 2013)
Publisher : Univ. Tadulako

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Abstract

Research on plant organogenesis Shallots (Allium ascalonicum L.) local Palu on MS medium with the addition of IAA and BAP, have been carried out in March and July 2013 in the Tissue Culture Laboratory, Faculty of Forestry Tadulako University. This study aims to get a combination of the concentration of IAA and BAP in MS medium onion plant organogenesis spur. Explants were used in the form of lateral shoots from the onion bulbs. This experiment is based on a complete randomized design (CRD) with 4 treatments, each treatment was repeated 5 times and every single unit test using a 2 explants. Growth media as treatments tested were: A1 (MS0 + 0.01 ppm IAA + 1 ppm BAP), A2 (MS0 + 0.05 ppm IAA + 1 ppm BAP), A3 (MS0 + 0.1 ppm IAA + 1 ppm BAP), A4 (MS0 + 0.5 ppm IAA + 1 ppm BAP). Judging from the appearance of the root, plantlet height, number of leaves, number of shoots, number of roots, chlorophyll content and the number of stomata per explant cultures tested The results showed that all treatments tested were able to induce organ onion crop Local Palu.. Based on these parameters, A1 is the best media in promoting organogenesis Local onion Palu. The media gives the best results appear to speed root, shoot number, leaf number and chlorophyll content. Other than that, the media A4 is also the best medium for the initiation stage plantlets before acclimatization. The media gives the best results for the number of stomata, while emerging roots and number of roots.
MENGKAJI PENYEBARAN PENYAKIT FILARIASIS MELALUI IDENTIFIKASI DAERAH KESTABILAN DARI REVISI MODEL SAK Susilawati, Endang; Ratianingsih, Rina; Jaya, Agus Indra
Natural Science: Journal of Science and Technology Vol 2, No 2 (2013): Volume 2 Number 2 (August 2013)
Publisher : Univ. Tadulako

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Abstract

Model SARK merupakan model matematika yang dapat digunakan untuk menggambarkan penyebaran penyakit Filariasis. Kajian penyebaran penyakit tersebut dilakukan melalui pengamatan terhadap dinamika model SARK. Penyebaran penyakit ini dapat dicegah melalui program pengobatan. Pengkajian dilakukan dengan merevisi model SAK menjadi model SARK untuk selanjutnya dianalisa dengan menentukan titik kesetimbangan dan analisis kestabilan dengan metode linearisasi, mengkaji kestabilan sis­tem berdasarkan kriteria nilai eigen dari matriks Jacobian. Hasil penelitian ini adalah model SARK sebagai berikut :           yang memiliki satu titik kritis . Model SARK memberikan nilai eigen  dan  bernilai negatif dan  dan  bernilai positif. Kondisi awal rasio jumlah penduduk pada kelas infectives, recovered dan kronis masing-masing diambil secara berturt-turut 1, 0 dan 0. Hasil identifikasi terhadap peran parameter  dan  adalah semakin besar nilai laju kesembuhan , maka akan mengakibatkan waktu yang dibutuhkan oleh populasi infectives untuk memasuki populasi recovered semakin singkat. Hal ini disebabkan peran pengobatan pada populasi infektives sehingga populasi tersebut sembuh dari penyakit.
INDUKSI KALUS BAWANG MERAH (ALLIUM ASCALONICUM L.) LOKAL PALU PADA MEDIUM MS DENGAN PENAMBAHAN 2,4-D (2,4-ASAM DIKLOROPENOKSI ASETAT) DAN AIR KELAPA Sorentina, Melisa S.M.; Haliani, Haliani; Muslimin, Muslimin; Suwastika, I Nengah
Natural Science: Journal of Science and Technology Vol 2, No 2 (2013): Volume 2 Number 2 (August 2013)
Publisher : Univ. Tadulako

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Abstract

Shallot c.v. Local Palu (BML-Palu) is one of importance agricultural commodities in Palu and surrounding area of Central Sulawesi. Unfortunately, in agricultural system, it?s facing difficulties in seed propagation. However, tissue culture approach was a potential technology which can be applied in order to overtake the problem. Our study was an early step in the application of this technology. We tried to find out the best combination of 2,4-D and coconut water in MS based medium, which suitable for callus induction. This experimental study was based on Completely Randomized Design (CRD), with 4 treatments, 3 replications, and 3 shallot explants on each unit. The treatments were PK1 (MS0 + 1 ppm 2,4-D + 10% coconut water), PK2 (MS0 + 1,5 ppm 2,4-D + 10% coconut water), PK3 (MS0 + 2 ppm 2,4-D + 10% coconut water), and PK4 (MS0 + 2,5 ppm 2,4-D + 10% coconut water). Out came of this research showed that all treatments, except PK2, were able to induce callus formation up to 80.55% of total explants. Based on the observed parameters i.e. time of Callus emerging, frecuency of explants producing callus, callus morphology and callus cell observation; PK3 was the best medium in callus induction and growth. Callus on this medium was intermediate-type, white in color, active in  cell propagation, also uniform in size. While PK2 was fail to induce the callus due to overproduction of secondary metabolite.
KAJIAN KADAR FENOLAT DAN AKTIVITAS ANTIOSIDAN JUS KULIT BUAH SEMANGKA (CITRULLUS LANATUS) Ismayanti, Ismayanti; Bahri, Syaiful; Nurhaeni, Nurhaeni
Natural Science: Journal of Science and Technology Vol 2, No 2 (2013): Volume 2 Number 2 (August 2013)
Publisher : Univ. Tadulako

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Abstract

This research aim to determine rate of total phenolic and activity of antioxidant of ellipse and circular watermelon peel juice. Method which used in examination of rate total phenolic that is method of Folin_Ciocalteu and activity of antioxidant use method of DPPH. Result of which is obtained from examination rate of phenolic circularwatermelon peel heavily 1,4 kg is 18,702% and ellipse watermelon peel heavily is 1,9 kg is 19,168%. Activity of antioxidant with value of IC50 of circular watermelon 214,369 ppm and ellipse watermelon 376,266 ppm. Base on value of IC50, both of sample that mentioned appertained weak antioxidant.
PRODUKSI BIOGAS MENGGUNAKAN CAIRAN ISI RUMEN SAPI DENGAN LIMBAH CAIR TEMPE Ihsan, Arsul; Bahri, Syaiful; Musafira, Musafira
Natural Science: Journal of Science and Technology Vol 2, No 2 (2013): Volume 2 Number 2 (August 2013)
Publisher : Univ. Tadulako

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Abstract

This study aimed to determine the effect of ratio of liquid cow contents with tempeh wastewater and fermentation time on biogas production. The research was conducted using a completely randomized design  (CRD) with 7 point ratio variation cows rumen fluid contents with liquid wastewater tempe  (0:100, 5:95, 10:90, 15:85, 20:80, 25:75 and 100:) and fermentation time consisted of 12, 24, 36, 48, 60, 72, 84 and 96 hours. Each treatment was repeated twice. From the results obtained it turns out the highest content of biogas at a ratio of biogas yield of 2894,35 mg/L. Which produces biogas fermentation time the highest yield for 84 hours. Positive test the presence of mhetane in the biogas shown with the blue flame in the flame test.
ORGANOGENESIS TANAMAN BAWANG MERAH (ALLIUM ASCALONICUM.L) LOKAL NAPU SECARA IN VITRO PADA MEDIUM MS DENGAN PENAMBAHAN IAA DAN BAP Utami, Felma Tri; Haliani, Haliani; Muslimin, Muslimin; Suwastika, I Nengah
Natural Science: Journal of Science and Technology Vol 2, No 2 (2013): Volume 2 Number 2 (August 2013)
Publisher : Univ. Tadulako

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Abstract

The aims of this study were to find out the optimum combination of IAA and BAP hormones in MS based medium, which suitable for promoting in vitro-organogenesis. In vitro experiment on inducing organogenesis of Shallot c.v. Local Napu showed that combination of 0.01 ppm IAA and 1 ppm BAP, it was the best combination on MS based medium for that organogenesis. These result was based on the measurements over several parameters, including: period of emerging shot and root, precentage of explant growth, number of roots, number of leaves, number of stomata, also chlorophil content of planlet leaves. This data suggesting that MS medium containing 0.01 ppm IAA and 1 ppm BAP was a potential medium to be used on propagation of shallot c.v. Local Napu.

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