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INDONESIA
SAINS DAN MATEMATIKA
Published by Universitas Diponegoro
ISSN : -     EISSN : -     DOI : -
Core Subject : Education,
Mathematics
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Articles 169 Documents
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Aktivitas Antibakteri Rimpang Temu Putih (Curcuma mangga Vall) Sarjono, Purbowatiningrum Ria
JURNAL SAINS DAN MATEMATIKA Volume 15 Issue 2 Year 2007
Publisher : JURNAL SAINS DAN MATEMATIKA

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Abstract

ABSTRAK---Penelitian ini dilakukan untuk menguji hipotesis bahwa rimpang temu putih mempunyai aktivitas sebagai antibakteri dan menentukan KHTM (Konsentrasi Hambat Tumbuh Minimum). Rimpang temu putih diambil filtratnya kemudian dibagi tiga. Pertama langsung diuji aktivitasnya, kedua diotoklaf kemudian diuji aktivitasnya dan ketiga dikeringkan (bubuk). Ketiga filtrat tersebut diuji terhadap pertumbuhan bakteri E.coli dengan metode kertas cakram. Aktivitas antibakteri filtrat rimpang temu putih tanpa otoklaf lebih tinggi dibanding yang diotoklaf. KHTM bakteri E.coli adalah 10 mg/mL dengan konsentrasi yang menghasilkan hambatan maksimum pada 50 mg/mL sebesar 6,83 mm. Filtrat rimpang temu putih dapat dipakai sebagai antibiotik terhadap penyakit yang disebabkan oleh E.coli.   Kata kunci: antibakteri, temu putih, Konsentrasi Hambat Tumbuh Minimum (KHTM)
Pemodelan Regresi Logistik dalam Penentuan Faktor-Faktor yang Berpengaruh Terhadap Penyakit Jantung Koroner Hoyyi, Abdul
JURNAL SAINS DAN MATEMATIKA Volume 19 Issue 3 Year 2011
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Abstract

Coronary heart disease (CHD) is a health problem and is one of the leading causes of the death in both developed and developing countries. Thereby it needs to analyze the factors which influence it. Some factors supposedly influence the CHD’s patients are cholesterol levels, low density lipoprotein levels, high density lipoprotein levels, triglyceride levels, systolic blood pressure, diastolic blood pressure and gender. The data used are secondary data from the medical records of CHD’s patients and general check-up records of the healthy people in a hospital in Yogyakarta. The analysis used in this research is binary logistic regression response with dichotomous dependent variables. Of the seven suspected factors, only four significant influence factors namely cholesterol levels, high-density lipoprotein levels, systolic blood pressure and diastolic blood pressure.   Keywords: CHD, logistic regression
Aplikasi Bio-Ekologi Makrobenthos sebagai Indikator Tingkat Kesuburan Tambak Muhammad, Fuad; Hidayat, Jafron Wasiq; Mukid, M. Abdul
JURNAL SAINS DAN MATEMATIKA Volume 21 Issue 3 Year 2013
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Abstract

Makrobenthos that live in the mangrove forest can be used to predict the role or contribution of mangrove ecosystems as a source of natural food for the environment. The aims of research to determine the structure, composition, abundance, diversity makrobenthos of the mangrove ecosystem. The study was conducted by comparing the community structure makrobenthos in pond ecosystem with mangrove vegetation constituent . The location of this study include three areas , Mangunharjo ( Semarang), Surodadi ( Demak ) and  Pasarbangi. The result can shows makrobentos species composition is dominated by gastropods ( 18 species) , Bivalvia ( 13 species ) , Polychaeta ( 3 types ) , and crustaceans ( 2 types ) . Cerithium and Littorina scabra is a type that has a high density of the mangrove ecosystem . There are differences in the abundance and diversity of plankton and makrobenthos at three study sites. In general Pasarbangi Coast has the highest abundance and diversity . Macrozoobenthos community structure in mangrove ecosystems that exist in the three study sites in a stable state , species diversity and distribution of the number of individuals of each type of uniform . Pasarbangi area with mangrove vegetation polyculture farms , have high primary productivity . This shows the level of primer productivity at the site is also high.   Keywords: community structure, macrobenthos, pond ecosystem
MODEL PERTUMBUHAN LOGISTIK PREDATOR DAN PREY PADA POPULASI PREY DAN SOLUSI KESETIMBANGAN Sunarsih, Sunarsih; Hidayati, Firsty Nur
JURNAL SAINS DAN MATEMATIKA Volume 18 Issue 1 Year 2010
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ABTRACT-- A  predator-prey model with logistic growth in the prey population is an iknteraction between  a  predator and  a  prey  population with logistic  growth  in the  prey  population. The  equations  in this model  are  non  linear dffirentiat  equation  with two dependent  variables.  In this  system,  H(t)  X size  of  prey population at time t  and P(t) is size  of  predator  population  at time t . This  model  have  three  equilibria.Key words  : logistic,  predator and  prey, equilibrium  pointPermalink : http://ejournal.undip.ac.id/index.php/sm/article/view/3118
Analisis Impedansi Elastik untuk Memprediksi Jenis Litologi Batuan dan Penyebaran Kandungan Fluida (Studi Kasus Lapangan MNWP– Pertamina DOH JBB) P., M. Nurdin W.; Yuliyanto, Gatot
JURNAL SAINS DAN MATEMATIKA Volume 15 Issue 1 Year 2007
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Abstract

ABSTRACT--- An identification of fluid contents on oil and gas exploration field has to be applied to determine a hydrocarbon and develop production area. This is caused a bright spot method that is based on associated with gas from seismic section, as a hydrocarbon indicator is failure, thus need an alternative method to determine the hydrocarbon from fluid contents. The identification of fluid contents are carry out on ‘MNWP’ field from inline 1380 – 1490, crossline 5040 – 5720, time 100 – 2000 millisecond with 9 well log data and use 2 software i.e. PG 2.0 Probe 3D and Vanguard. The identification involves elastic impedance analysis to find low impedance on Parigi Formation and to lithology prediction from the formation as a reservoir layer. The analysis result of elastic impedance describes that on Parigi Formation is covered by carbonate and discover fluid contents distribution be oriented from south to north that process sedimentation appropriate.Keywords: seismic section, fluid contents, impedance analysis
The Growth of Botryococcus braunii Microalgae as a Lipid Producer in a Mixed Medium of Coconut Water and Seawater Saputro, Bintoro Rudi; Kusdiyantini, Endang; Kusumaningrum, Hermin Pancasakti
JURNAL SAINS DAN MATEMATIKA Volume 23 Issue 4 Year 2015
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Abstract

Energy needs in fuel sector tend to increase for supporting human life. Green microalgae (Chlorophyceae) can be used as an alternative solutions for bioenergy. Botryococcus braunii is lipid producer microalgae which can be processed further into biodiesel. Microalgae growth medium such as Walne can be substituted with coconut water that reducing economical cost. This research aims to determine the growth of B. braunii using coconut water and its effect on lipid production. The experiment conducted into five treatments of coconut water consist of P0 (0%), P1 (10%), P2 (7.5%), P3 (5%), and P4 (2.5%) for five days incubation and three repetitive step. Microalgae growth was calculated according to cell count using hemocytometer. The results showed that 2.5% coconut water substitution exhibited the best growth rate and lipid production, i.e. the amount of 547 cells / ml and produced lipid level according to these treatment increased 179% comparing with control.
STATUS TROFIK DANAU RAWAPENING DAN SOLUSI PENGELOLAANNYA Soeprobowati, Tri Retnaningsih; Suedy, Sri Widodo Agung
JURNAL SAINS DAN MATEMATIKA Volume 18 Issue 4 Year 2010
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Abstract

ABSTRACT---Eutrofikasi adalah pengkayaan perairan oleh unsur hara, khususnya nitrogen dan fosfor sehingga mengakibatkan pertumbuhan tidak terkontrol dari tumbuhan air. Berdasarkan kandungan unsur haranya, maka perairan dapat dikategorikan menjadi oligotrofik, mesotrofik dan eutrofik. Danau Rawapening menerima inlet dari 16 sungai dan hanya memiliki 1 outlet, menyebabkan akumulasi materi yang cukup tinggi. Penelitian ini bertujuan untuk mengkaji status trofik Danau Rawapening, sehingga dapat menjadi landasan dalam upaya pengembangan pengelolaannya. Pengambilan sampel air dilakukan pada Februari 2008 pada 7 titik untuk analisis fitoplankton dan kandungan total nitrogen, fosfor, silikon, potasium, kalsium dan mangaan. Pengukuran temperatur, DO, pH, kekeruhan, konduktivitas, turbiditas dilakukan secara in-situ. Pengambilan sampel air untuk analisis BOD dilakukan menggunakan 2 botol gelap 300mL, botol pertama diukur DO0, botol ke-2 diinkubasi selama 5 hari kemudian dihitung DO5.. Penghitungan kandungan klorofil menggunakan metode spektrofotometri. Berdasarkan kandungan klorofilnya, maka dapat dihitung nilai produktivitas primer. Berdasarkan kandungan Total Fosfor Danau Rawa Pening dalam kondisi mesotropik, tapi berdasarkan kandungan Total Nitrogen dankecerahan perairan yang kurang dari 2 meter termasuk dalam kondisi eutrofik. Hal ini ditunjukkan oleh dominannya Aulacoseira granulata dan Melosira varians. Kualitas air seperti pH, DO, kecerahan, kandungan logam berat mengalami degradasi dan cenderung melebihi ambang batas Baku Mutu Lingkungan. Ekoteknologi merupakan pendekatan yang dapat diimplementasikan di Danau Rawapening, menjadikan eceng gondok sebagai sabuk hijau, dan pembuatan preimpoundment di hilir inlet sebelum masuk ke danau.Key words: status trofik, eutrofikasi, danau Rawapening, pengelolaan danau
Biokonversi Jerami Padi Menjadi Gula Fermentasi Menggunakan Konsorsium Termofilik Kompos Wahyuningsih, Melly; Sarjono, Purbowatiningrum Ria; Aminin, Agustina L. N.
JURNAL SAINS DAN MATEMATIKA Volume 21 Issue 1 Year 2013
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Abstract

Penelitian melaporkan degradasi jerami padi dalam memproduksi gula pereduksi menggunakan konsorsium mikroba kompos fase termofilik dan kompleks ekstraseluler lignoselulolitik. Penelitian ini bertujuan memperoleh data sistem fermentasi paling efektif dalam mendegradasi jerami padi untuk menghasilkan gula pereduksi menggunakan kompos fase termofilik pada suhu 50°C selama 48 jam dari sistem fermentasi cair, semipadat, dan padat, memperoleh data kadar gula pereduksi tertinggi hasil degradasi jerami padi menggunakan kompos fase termofilik pada suhu 50°C selama 48 jam, memperoleh data aktivitas dan keragaman kompleks lignoselulolitik hasil fermentasi jerami padi yang diuji terhadap substrat CMC, xilan, dan jerami padi. Metode yang dilakukan adalah penentuan sistem fermentasi jerami padi (sistem cair, semipadat, dan padat), penentuan waktu optimum degradasi jerami padi dilihat dari profil kadar gula pereduksi, isolasi kompleks enzim lignoselulolitik, dan uji aktivitas kompleks enzim lignoselulolitik terhadap CMC, xilan, dan jerami padi. Hasil penelitian menunjukkan bahwa sistem fermentasi padat lebih baik dibanding sistem fermentasi cair maupun semipadat dalam menghasilkan gula pereduksi. Kadar gula pereduksi tertinggi dihasilkan pada jam ke-32 sebesar 0,624 mg/mL dan kompleks enzim lignoselulolitik mengandung selulase, xilanase, dan enzim-enzim pendegradasi lignin.   Kata kunci: jerami padi, kompos termofilik, kompleks lignoselulolitik
INVERSI MODEL BASED UNTUK GAMBARAN LITOLOGI BAWAH PERMUKAAN FR, Tabah; Danusaputro, Hernowo
JURNAL SAINS DAN MATEMATIKA Volume 18 Issue 3 Year 2010
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Abstract

ABSTRACT-IncreosW of occuracy underground level imaging can be performed by using seismic inversion method. Apply inversion method to seismic data produce acoustic impedance value. Acoustic impedmce related directly with rock characteristic, so can be separating lithology. Based model irwersion built geologt model, then conelated with seismic data, upgrading iterative to get good suitable with seismic data. Result of based model funersioncan be able to produce result of inversion which is having same trend acoustic impedance with the original data seismic, thot also between syltthetic seismic and original seismic, so can be separating lithologt boundary conectly os vertical or continue as lateral.Key word: acoustic impedance, based model inversion, lithologyPermalink : http://ejournal.undip.ac.id/index.php/sm/article/view/2950
Pengayaan Yodium dan Kadar NaCl pada Garam Krosok menjadi Garam Konsumsi standar SNI Enrichment of Iodium and Sodium Cloride in the Traditional Salt become Consumtion Salt INS Standard M. Nur; I. Marhaendrajaya; Sugito Sugito; T. Windarti; Arnelli Arnelli; R. Hastuti; A. Haris; W. H. Rahmanto; Didik Setiyo Widodo; F. Ariyanto; Z. Muhlisin; J. E. Suseno; E. Setiawati; H. Sutanto; Priyono Priyono; M. Izzati; R. Hariyati; S. Tana; B. Raharjo; D. Ispriyanti; Farikhin Farikhin; A. Rusgiyono; Suhartono Suhartono
JURNAL SAINS DAN MATEMATIKA Volume 21 Issue 1 Year 2013
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Abstract

This research has been carried out in the quality improvement of traditional salt (krosok salt) into salt consumption for the Indonesian National Standard. This report is devoted to the elevated levels of NaCl and KIO3. Increased levels of NaCl and Iodine (represented by KIO3) is done by washing the salt with the traditional clothes washer with two rounds and by using water with saline solution at 22-24 Be (known as the old water). Traditional salt taken from three districts, such as Pati District, Jepara District, and Rembang District. We found that the concentration of NaCl in the treatment salt maximum is  96 % and Iodium or present of KIO3 is 40 ppm.   Key words: Salt,  traditional, INS, Consumtion, NaCl, KIO3

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