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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 254 Documents
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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.
ANALISIS STRUKTUR BAWAH PERMUKAAN DENGAN MENGGUNAKAN METODE SEISMIK REFRAKSI DI UNIVERSITAS TADULAKO Adnyawati, Ni Ketut; Efendi, Rustan; Sabhan, Sabhan
Natural Science: Journal of Science and Technology Vol 1, No 1 (2012)
Publisher : Univ. Tadulako

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Abstract

The method is one of the seismic refraction geophysical methods that can be used to determine the structure of the subsurface. The purpose of this study was to to determine the subsurface structure in the area Tadulako University. In this method, the waves generated on the surface of the Earth that will reach down into the surface of the soil or rock, then disuatu point of the boundary between two layers of rock wave is reflected back to the surface and partially transmitted down some refracts due to changes in rock density. Wave propagation below the surface will be detected by the geophones. Aqusisi and data processing method Intercept Time. Data processing is done in 2 stages, using the program and program pickwin Plotreva. The end result of this data processing is the image of the subsurface profile Tadulako University of 6 stretch consisting of three layers of the same. The first layer has a wave speed (V1) 300 m/s are expected mixing of sand gravel dominated by gravel, the second layer has a wave velocity (V2) 1000 m/s are suspected of mixing sand gravel dominated by sand and the third layer has a velocity 2000 m/s are expected mixing of sand and clay.
FABRIKASI GENTENG POLIMER BERBAHAN ABU BATU BARA (FLY ASH) PLTU MPANAU, ASPAL DAN Anjarsari, Dewi; Kasman, Kasman; Sesa, Elisa
Natural Science: Journal of Science and Technology Vol 7, No 3 (2018): Volume 7 Number 3 (December 2018)
Publisher : Univ. Tadulako

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Abstract

Penelitian tentang fabrikasi genteng polimer telah dilakukan dengan menggunakan abu batu bara (fly ash) PLTU Mpanau, aspal dan polipropilen. Tujuan dari penelitian ini  adalah untuk mengetahui rasio campuran fly ash, aspal dan polipropilen untuk menghasilkan genteng polimer dengan kualitas terbaik dan mengetahui sifat fisik dan mekanik genteng polimer dengan variasi komposisi fly ash dan polipropilen. Pembuatan sampel genteng polimer ini  menggunakan bahan campuran fly ash, resin polipropilen, dan aspal dengan komposisi yang bervariasi yaitu sampel A (50:45:5), sampel B (45:50:5), sampel C (40:55:5) dan sampel D (35:60:5). Berdasarkan hasil penelitian komposisi terbaik yaitu sampel B (45:50:5) gr yang memiliki porositas 0,047%, daya serap air 0,18%, densitas 0,26 gr/cm3, kuat impak 1,10 kJ/m2 dan kuat lentur 9,1 MPa. Berdasarkan sifat-sifat fisik dan mekanik yang dimiliki sampel genteng polimer tersebut, maka dapat diaplikasikan sebagai konsep baru material konstruksi bagian atap rumah yang ramah lingkungan pengganti genteng konversional
FORMULASI TABLET EFFERVESCENT JAHE (Z OFFICINALE ROSCOE) DENGAN VARIASI KONSENTRASI SUMBER ASAM DAN BASA Kholidah, Sitti; Yuliet, Yuliet; Khumaidi, Akhmad
Natural Science: Journal of Science and Technology Vol 3, No 3 (2014): Volume 3 Number 3 (December 2014)
Publisher : Univ. Tadulako

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Abstract

Penelitian mengenai formulasi tablet effervescentsari jahe. Penelitian ini bertujuan untuk mengetahui pengaruh penggunaan variasi konsentrasi sumber asam dan basa terhadap mutu fisik tablet.  Metode yang digunakan yaitu metode granulasi basah. Empat variasi formula masing-masing dengan konsentrasi asam basa 50%, 60%, 65% dan 70%. Evaluasi mutu fisik granul meliputi ujikadar air, uji kandungan lembab, uji kompresibilitas, uji waktu alir dan sudut diam. Evaluasi tablet pada hari 1 dan 21 untuk mengetahui stabilitas mutu fisik tablet yang meliputi uji keseragaman bobot, uji kekerasan tablet, uji kerapuhan tablet dan uji waktu larut. Data yang diperoleh dibandingkan dengan Farmakope Indonesia dan literatur lain lalu dianalisis dengan uji oneway ANOVA dan uji t-student. Hasil yang diperoleh menunjukkan penggunaan variasi konsentrasi asam basa tidak berpengaruh terhadap stabilitas mutu fisik tablet yang meliputi keseragaman bobot, kekerasan, kerapuhan tetapi berpengaruh terhadap waktu larut  tablet effervescent jahe. Konsentrasi asam basa yang memenuhi mutu fisik tablet yang optimum yaitu formula 4 dengan konsentrasi asam basa 70% (asam sitrat 8,58%, asam tartrat 27,17% dan  natrium bikarbonat 34,45%).
PEMBUATAN DAN PENGUJIAN SIFAT MEKANIK PLASTIK BIODEGRADABLE BERBASIS TEPUNG BIJI DURIAN Arini, Dewi; Ulum, M.Syahrul; Kasman, Kasman
Natural Science: Journal of Science and Technology Vol 6, No 3 (2017): Volume 6 Number 3 (December 2017)
Publisher : Univ. Tadulako

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Abstract

Pembuatan dan pengujian sifat mekanik plastik biodegradable berbasis tepung biji durian telah dilakukan. Penelitian ini bertujuan untuk mengetahui sifat mekanik plastik biodegradable yang meliputi uji kuat tarik, elongasi, dan modulus Young. Pengujian sifat mekanik kuat tarik dilakukan menggunakan alat Stress Analyzer 1000, dengan bentuk spesimen uji tarik yang merujuk pada standar ASTM-D638. Berdasarkan hasil penelitian, diperoleh nilai kuat tarik rata-rata 0,1158 MPa, elongasi 2,1875%, dan modulus Young 4,1515 MPa. Dibandingkan dengan golongan moderate properties plastik biodegradable, nilai tersebut masih jauh dari standar. Hal ini menunjukkan bahwa metode yang digunakan dalam pembuatan plastik biodegradable pada penelitian ini masih perlu dioptimalkan.
PERBANYAKAN TANAMAN MELON (CUCUMIS MELO L.) SECARA IN VITRO PADA MEDIUM MS DENGAN PENAMBAHAN INDOLE ACETIC ACID (IAA) DAN BENZIL AMINO PURIN (BAP) Lidyawati, Ni Nyoman; Waeniati, Waeniati; Muslimin, Muslimin; Suwastika, I Nengah
Natural Science: Journal of Science and Technology Vol 1, No 1 (2012)
Publisher : Univ. Tadulako

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Abstract

The research on organogenesis of melon (Cucumis melo L.) was done at Tissue Culture Laboratory Forestry Faculty UNTAD Palu, during January until May 2012. The aim of this research was to determine the best concentration of IAA and BAP hormones in inducing organs of this plant.  Sterile seedling of melon was used as explants in this work. The experiment was arranged in  Completely Randomized Design (CRD)  with  4 treatments and 4 replications. The treatments were MS0 + 0,1 ppm IAA + 0,5 ppm BAP (M1), MS0 + 0,1 ppm IAA + 0,7 ppm BAP (M2), MS0 + 0,1 ppm IAA + 0,9 ppm BAP (M3) and MS0 + 0,1 ppm IAA + 1 ppm BAP (M4). Parameters observed on this study were the day appear of shoot and leaves, the number of shoots and leaves and also the present of callus and root. The result showed that the best medium for organs induction was MS0 + 0,1 ppm IAA + 1 ppm BAP, which shoot and leaf emerged in the day of 3,75 and 5,75 after induction, respectively. This media was also induced the number of shoots and leaves, i.e 4,75 and 8,75, respectively. Nevertheles this media was not suitable enough in inducing root formation.
OPTIMALISASI PENERAPAN BIOTEKNOLOGI DALAM PRODUKSI BIOETANOL DARI SAGU (METROXYLON SP.) Widayanti, Sayu Nila; Mappiratu, Mappiratu; Hardi, Jaya
Natural Science: Journal of Science and Technology Vol 5, No 1 (2016): Volume 5 Number 1 (March 2016)
Publisher : Univ. Tadulako

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Abstract

"> Telah dilakukan penelitian tentang optimalisasi penerapan bioteknologi dalamproduksi bioetanol dari sagu. Optimalisasi mencangkup pengaruh konsentrasi enzim ?-amilase dan waktu hidrolisis terhadap glukosa yang dihasilkan dari hidrolisis pati sagu sertapengaruh waktu fermentasi terhadap kadar bioetanol yang dihasilkan. Penelitian ini dirancang menggunakan Rancangan Acak Lengkap (RAL) dengan tiga taraf ulangan. Variasi konsentrasi enzim ?-amilase dirancang dengan 5 taraf (0; 0,05; 0,06; 0,07; 0,08% (v/v)) dan waktu hidrolisis (1; 1,5; 2; 2,5; 3 jam) dimana kadar glukosa yang dihasilkan dianalisis menggunakan metode DNS. Hasil penelitian menunjukkan konsentrasi enzim 0,08% (v/v) dengan waktu hidrolisis tetap (1 jam) menghasilkan kadar glukosa tertinggi yaitu sebesar 9,25% dan waktu hidrolisis 3 jam dengan konsentrasi enzim tetap (0,08% (v/v)) menghasilkan kadar glukosa tertinggi yaitu sebesar 11,41%. Variasi waktu fermentasi dengan 5 taraf (3; 4; 5; 6; 7 hari) dimana bioetanol yang dihasilkan dimurnikan dengan metode destilasi dan diukur dengan alkohol meter. Hasil penelitian menunjukkan waktu fermentasi tertinggi diperoleh pada hari ke-7 dengan kadar bioetanol 5,75%.
UJI EFEK ANTIPIRETIK KOMBINASI EKSTRAK ETANOL HERBA SAMBILOTO (ANDROGRAPHIS PANICULATA BURM.F. NEES.) DAN EKSTRAK ETANOL DAUN BELIMBING WULUH (AVERRHOA BILIMBI L.) PADA TIKUS PUTIH JANTAN (RATTUS NORVEGICUS) Ibrahim, Nurhalifah; Yusriadi, Yusriadi; Ihwan, Ihwan
Natural Science: Journal of Science and Technology Vol 3, No 3 (2014): Volume 3 Number 3 (December 2014)
Publisher : Univ. Tadulako

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Abstract

This research is about antipyretic effect of combination ethanol extract of sambiloto (Andrographis paniculata Burm.f. Nees.) herbsand ethanol extract of  belimbing wuluh (Averrhoa bilimbi L.) leaves in white male rats (Rattus norvegicus)which induced by 5 % pepton, in order to know the effect of combination and to determine the most effective dose as an antipyretic. Extract was prepared by maceration method using 70% ethanol. White rats were grouped into 7 difference treatment. Each rat was induced by using 5% peptone in dose of 250 mg/200 g Body Wight (BW). The first group was given Na CMC as a negative control. The second group was given paracetamol as a positive control. Groups of 3rd, 4th, 5th, 6th and 7th were given a combination of ethanol extract sambiloto (A. paniculata Burm.f. Nees.) herbs and ethanol extract belimbing wuluh (A. bilimbi L.) leaves in doses of (200 + 0) mg/200 g BW,  (150 + 50) mg/200 g BW, (100 + 100) mg/200 g BW, (50 + 150) mg/200 g BW, and  (0 + 200) mg/200 g BW, respectively. Temperature measurements of antipyretic were done for 3 hours in 30 minutes interval. Temperature data were statistically analysed using ANOVA (Analisys Of Variance) one way Anova method. The result of research was showed that combinationextract could reduce thefever. The most effective combination as an antipyretic was ethanol extract of sambiloto (A. paniculata Burm.f. Nees.) Herbs 150 mg and ethanol extract of belimbing wuluh (A. bilimbi L.) leaves 50 mg (150 + 50) mg/200 g BW. The dose has antipyretic effects that was not significant different to the positive control group(paracetamol treatment).
UJI DAYA HAMBAT DAN SKRINING FITOKIMIA EKSTRAK DAUN MACARANGA TANARIUS (L.) MULL. ARG SEBAGAI ANTIBAKTERI SALMONELLA TYPHI Musdalifah, Musdalifah; Khumaidi, Akhmad; Suwastika, I Nengah
Natural Science: Journal of Science and Technology Vol 6, No 3 (2017): Volume 6 Number 3 (December 2017)
Publisher : Univ. Tadulako

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Abstract

Penelitian uji daya hambat dan skrining fitokimia ekstrak daun Macaranga tanarius (L.) M.A sebagai antibakteri Salmonella typhi telah dilaksanakan pada bulan Oktober sampai November 2016. Penelitian ini bertujuan untuk mendeskripsikan morfologi tumbuhan, mengetahui aktifitas antibakteri, serta kandungan kimia ekstrak daun M.  tanarius (L.) M.A. Penelitian in menggunakan metode deskriptif, analisis skrining fitokimia,dan eksperimental dalam uji daya hambat ekstrak yang disusun dalam Rancangan Acak Lengkap (RAL) dengan 6 perlakuan dan 3 ulangan. Perlakuan meliputi pemberian konsentrasi ekstrak daun 10%, 20%, 40% dan 60%, serta kontrol positif (kloramfenikol 1%) dan kontrol negatif (Na-CMC 1%). Hasil penelitian menunjukan bahwa ekstrak  tumbuhan M. tanarius (L.) M.A pada konsentrasi 60% menghasilkan zona hambat yang paling besar yaitu 20 mm, lebih tinggi dibandingkan konsentrasi lainnya, namun masih lebih kecil dibandingkan kontrol positif. Hasil skrining fitokimia menunjukan adanya senyawa alkaloid, tanin dan saponin pada tumbuhan Macaranga tanarius (L.) M.A
OPTIMALISASI HIDROLISIS SUKROSA MENGGUNAKAN RESIN PENUKAR KATION TIPE SULFONAT Razak, Abd. Rahman Razak; Sumarni, Ni Ketut; Rahmat, Basuki
Natural Science: Journal of Science and Technology Vol 1, No 1 (2012)
Publisher : Univ. Tadulako

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Abstract

Optimization of sucrose hydrolysis has been investigated by using a sulfonic type cation excange. The aim of investigation are to find out the effect of resin concentration, agitation time and the recycling of resin without ion excange treatment with optimum condition for the effectiveness of resin as catalys in hydrolysis of sucrose 70%. The result, there were obtained that the optimum condition in hirolysis of sucrose occurred at 30 grams of resin and agitation time at 16 hours, the product of sugar invert was 833.810 mg or 1.132%. The recycled of resin without ion treatment on the optimum condition as catalys in hidrolysis sucrose affected to the reduction of resin effectiveness. From Duncan?s test, the best effectiveness recycling of resin without ion treatment on the optimum condition are four time

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