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Reni Ambarwati
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Jurusan Biologi, Fakultas Matematika dan Ilmu Pengetahuan Alam Gedung D1 Kampus UNESA Ketintang Surabaya Kode Pos 60213 E-mail: sainsmatematika@unesa.ac.id Telp : 031-8280009
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Sains dan Matematika
Published by Universitas Negeri Surabaya
ISSN : 23027290     EISSN : 25481835     DOI : -
Core Subject : Science, Education,
Astronomy Biochemistry, Genetics & Molecular Biology Chemistry Mathematics Physics
Jurnal ini menerbitkan artikel asli hasil penelitian di bidang biologi, fisika, kimia, dan matematika. Redaksi hanya menerima naskah asli yang belum pernah dipublikasikan dan tidak sedang dalam proses penerbitan di jurnal lain. Naskah dapat ditulis dalam bahasa Indonesia, sesuai dengan ejaan yang baik dan benar atau bahasa Inggris yang baik dan benar.
Arjuna Subject : Umum - Umum
Articles 198 Documents
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PENGGUNAAN TIPE HABITAT OLEH AVIFAUNA DI LINGKUNGAN PT ARUTMIN INDONESIA – NPLCT, KABUPATEN KOTABARU, KALIMANTAN SELATAN Soendjoto, Mochamad Arief; Riefani, Maulana Khalid; Zen, Muhammad
Sains & Matematika Vol 3, No 1 (2014): Oktober, Sains & Matematika
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Pengelolaan dan pemantauan lingkungan PT Arutmin Indonesia-NPLCT yang mengoperasikan pelabuhan batu bara di Kabupaten Kotabaru, Kalimantan Selatan difokuskan pada fauna laut. Avifauna diurnal di lingkungan PT Arutmin Indonesia-NPLCT belum dieksplorasi dan didokumentasikan. Tujuan penelitian adalah menganalisis penggunaan tipe habitat oleh avifauna dalam tiga periode pengamatan. Spesies avifauna diidentifi kasi pada titik/lingkar kelimpahan dan penjelajahan di hutan mangrove, hutan sekunder, permukiman/perkantoran, lahan terbuka/padang rumput/semak belukar, dan perairan. Frekuensi jumpaan setiap spesies avifauna dan frekuensi relatif penggunaan tipe habitat oleh spesies dihitung berdasarkan pada unit waktu berdurasi 5 menit per unit. Selama penelitian ditemukan 57 spesies avifauna di seluruh lingkungan tersebut. Jumlah atau keragaman spesies burung cenderung turun di perairan dan naik di empat tipe habitat lainnya mulai dari periode pengamatan pertama hingga ketiga. Hampir semua spesies ditemukan di lebih dari satu tipe habitat. Frekuensi relatif penggunaan tipe habitat oleh spesies-spesies itu bervariasi. Hanya dua spesies saja yang ditemukan 100% menggunakan satu tipe habitat untuk aktivitasnya. Environment management and monitoring of PT Arutmin Indonesia-NPLCT operating a coal port in Kotabaru Regency, Kalimantan Selatan was used to be focused on marine biota. Diurnal avifauna in the area of PT Arutmin Indonesia-NPLCT was not explored and documented. The objective of the research was to analyze the habitat type utilization by avifauna in three observation periods. Avifauna species was identifi ed in abundance points and survey in mangrove forest, secondary forest, resettlement/offi ce, open area/grassland/ shrub, and water. Scan frequency of every avifauna species and relative frequency of habitat type utilization by species were counted based on a fi ve-minute unit. Fifty seven avifauna species were found in the area. The number and the diversity of species tended to decrease on the water and increase in the other habitat types from the fi rst period to the third one. Almost all species were found in more than a single habitat type. Relative frequency of habitat type utilization by species varied. There were two species utilizing a single habitat type for their activity.
Biokonversi Sampah Organik Pasar Menjadi Biogas Menggunakan Starter Effective Microorganisms (EM4) Sanjaya, I Gusti Made
Sains & Matematika Vol 1, No 1 (2012): Oktober, Sains & Matematika
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Bioconversion of organic waste into biogas has been studied using a variation of effective micro-organisms starter, EM4. Optimum bioconversion resulted in the addition of EM4 9% to produce biogas as much as 328.17 ml. Biogas at optimum bioconversion conditions had the composition of methane gas 61.97% and 36.04% carbon dioxide. 
Sintesis Lapisan Tipis PANi/PVA sebagai Bahan Elektrokromik Novita, Ria; Putri, Nugrahani Primary
Sains & Matematika Vol 5, No 2 (2017): April, Sains & Matematika
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Polianilin (PANi) merupakan bahan polimer konduktif yang banyak diteliti dikarenakan memiliki karakteristik yang unik yaitu, konduktivitas listrik yang baik, sifat optik yang baik dan stabil terhadap lingkungan. PANi dapat digunakan dalam berbagai aplikasi, salah satunya sebagai bahan elektrokromik. Bahan elektrokromik merupakan bahan yang dapat berubah warna secara reversible jika diberi beda potensial. Pada penelitian ini telah dilakukan sintesis PANi/PVA dengan metode polimerisasi emulsi dan deposisi lapisan tipis dengan metode spin-coating menggunakan substrat Indium tin Oxide (ITO). Tujuan dari penelitian ini adalah untuk mengetahui karakteristik awal lapisan tipis PANi/PVA sebagai bahan elektrokromik meliputi reversibilitas, nilai band gap dan nilai absorbansi pada pemberian potensial yang berbeda.  Metode karakterisasi yang dilakukan pada penelitian ini adalah Uji FTIR, Uji Voltametri Siklik, Uji UV-Vis, dan SEM. Dari pengujian FTIR PANi/PVA terlihat bahwa pola serapan khas dari kedua polimer masih muncul yaitu pada puncak 669,32 cm-1, 1114,89 cm-1, 1265,35 cm-1, 1458,23 cm-1, dan 1654,98 cm-1yang merupakan puncak khas milik polianilin sedangkan pada puncak 1654,98 cm-1, 2929,97 cm-1, dan 3448,84 cm-1  merupakan puncak khas PVA. Dari data Voltametri Siklik lapisan tipis bersifat reversible dan ada puncak oksidasi pada potensial 0,4 V dan 0,74 V, sedangkan puncak reduksi pada potensial 0,45 V dan 0,22 V. Dari data pengujian UV-Vis didapatkan nilai absorbansi PANi/PVA tertinggi adalah 0,80 pada potensial 0,75 V dan memiliki nilai energi band gap sebesar 3,1-4,1 eV. Dari hasil pengujian SEM didapatkan bahwa persebaran PVA sudah cukup merata dan hanya sedikit terlihat retakan. Polyaniline (PANi) is a conductive polymer material that has been widely studied because it has unique characteristics namely, good electrical conductivity, and good optical properties and is stable to the environment. PANi can be used in a variety of applications, one of which is as an electrochromic material. Electrochromic material is a material that can change color reversibly if given a potential difference. In this research, PANi/PVA synthesis was carried out by emulsion polymerization method and thin layer deposition via spin-coating method using Indium tin Oxide (ITO) substrate. The purpose of this study was to determine the initial characteristics of PANi/PVA thin films as electrochromic materials including reversibility, band gap values and absorbance values at different potential applications. The characterization methods used in this study were FTIR Test, Cyclic Voltammetry Test, UV-Vis Test, and SEM. From the PANi/PVA FTIR test it is seen that the typical absorption patterns of the two polymers still appear at the peak 669.32 cm-1, 1114.89 cm-1, 1265.35 cm-1, 1458.23 cm-1, and 1654, 98 cm-1 which is the typical peak of PANi while at the peak 1654.98 cm-1, 2929.97 cm-1, and 3448.84 cm-1 is the typical peak of PVA. From the data of cyclic voltammetry the film is reversible and there is an oxidation peak at a potential of 0.4 V and 0.74 V, whereas a reduction peak at a potential of 0.45 V and 0.22 V. From the UV-Vis test data, the highest PANi/PVA absorbance value is 0.80 at a potential of 0.75 V and has a band gap energy value of 3.1-4.1 eV. From the SEM test results found that the spread of PVA is quite evenly distributed and only slightly visible cracks.
Lemma Henstock untuk Suatu Fungsi Bernilai Vektor di dalam Ruang Metrik Kompak Lokal Manuharawati, Manuharawati
Sains & Matematika Vol 2, No 1 (2013): Oktober, Sains & Matematika
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Based on an interval system S in a locally compact metric space, we have a cell in a locally compact metric space, i.e. an interval compact in S. In addition, if a cell E and a function d : E ® R+ are given, we have proven the exsistence of Perron d ® fine partition on E. Using a Perron d ® fine partition on a cell E, we can contruct a Henstock integral of a real valued function in a locally metric space nondiscrete. By generalizing a range function of its function, i.e. from a set of all real numbers to a vector space, we can construct a Henstock integral of a vector valued function on a cell in locally metric space nondiscrete. This research used a method of literature study, which was done by examining relative integral theories, building new concepts and proving theorems using logical mathematic reasoning as well as right calculation.
Isolasi dan Karakterisasi Bacillus sp. Pelarut Fosfat dari Rhizosfer Tanaman Leguminosae Mukamto, Mukamto; Ulfa, Syazwani; Mahalina, Weda; Syauqi, Ahmad; Istiqfaroh, Laila; Trimulyono, Guntur
Sains & Matematika Vol 3, No 2 (2015): April, Sains & Matematika
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Rhizosfer tanaman Leguminosae banyak ditumbuhi bakteri, salah satunya adalah genus Bacillus yang merupakan Plant Growth Promoting Bacteria yang bermanfaat bagi tumbuhan, di antaranya karena kemampuannya dalam melarutkan fosfat. Tujuan penelitian ini untuk mendapatkan isolat Bacillus sp. dari rhizosfer tanaman Leguminosae yang memiliki kemampuan melarutkan fosfat. Penelitian ini dilakukan dengan melakukan isolasi bakteri, karakterisasi koloni, pewarnaan Gram, pewarnaan endospora, uji katalase, dan uji kelarutan fosfat. Metode isolasi yang digunakan dengan metode pour plate dan untuk pengujian bakteri pelarut fosfat menggunakan media Pikovskaya. Sebanyak 36 isolat Bacillus sp. berhasil diisolasi dengan berbagai karakter koloni dan karakter sel berbentuk batang, Gram positif, membentuk endospora, dan memiliki katalase positif kecuali isolat BAP2 dan BAP5 yang memiliki katalase negatif. Sebanyak lima isolat Bacillus sp. (isolast BCP 2, BCP 4, BAC 2, BCM 3, dan BAP 1) diketahui mampu melarutkan fosfat dengan terbentuknya holozone di sekitar koloni setelah masa inkubasi tujuh hari. Rhizosphere of Leguminosae is inhabited by bacteria, one of which is the genus Bacillus which is Plant Growth Promoting Bacteria that are benefi cial to plants, such as its ability to dissolve phosphate. The purpose of this study was to obtain isolates of Bacillus sp. from the rhizosphere of Leguminosae plants which has the ability to dissolve phosphate. This study was conducted by bacterial isolation, characterization colonies, Gram staining, coloring endospores, catalase test, and solubility test phosphate. Isolation methods used by the pour plate method for testing bacteria and phosphate solvent using Pikovskaya media. A total of 36 isolates of Bacillus sp. successfully isolated colonies with different characters and character of rod-shaped cells, Gram-positive, form endospores, and has a positive catalase except isolates BAP2 and BAP5 which has a negative catalase. A total of fi ve isolates of Bacillus sp. (Isolast BCP 2, BCP 4, BAC 2, 3 BCM, and BAP 1) known to be capable of dissolving phosphate holozone formation around the colonies after an incubation period of seven days.
Modifikasi Elektroda Pasta Karbon dengan Antrakuinon untuk Identifikasi Nikotin pada Rokok Komersial Khoiriyah, Nuril; Setiarso, Pirim
Sains & Matematika Vol 5, No 1 (2016): Oktober, Sains & Matematika
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Penelitian mengenai modifikasi elektroda pasta karbon dengan antrakuinon untuk identifikasi nikotin dalam rokok komersial telah dilakukan. Nikotin, 3-(1-metil-2-pirolidinil) piridin, merupakan suatu basa yang mudah menguap sehingga dalam identifikasinya memerlukan perlakuan khusus. Penelitian ini bertujuan untuk mengetahui komposisi terbaik elektroda pasta karbon termodifikasi antrakuinon, pH, dan waktu deposisi sehingga dapat digunakan untuk mengidentifikasi nikotin dalam rokok komersial secara voltametri siklik. Hasil penelitian menunjukkan bahwa nikotin menghasilkan puncak tunggal oksidasi pada komposisi terbaik EPKA 3:3:4 dengan jumlah antrakuinon yang lebih banyak dari karbon dan minyak parafin. pH optimum pengukuran berada pada pH 9 dengan waktu deposisi 30 detik. Kadar nikotin dalam tiga merk rokok A, B, C berturut-turut yang terukur dengan EPKA secara voltametri adalah 0,62; 1,12; 1,24 mM. Hasil penelitian divalidasi dengan metode pengukuran lain. Pengukuran secara HPLC menunjukkan hasil yang tidak jauh berbeda dengan selisih rata-rata 0,074 M untuk konsentrasi sampel nikotin dalam rokok. The research about modifying carbon paste electrode by anthraquinone for nicotine identification in commercial cigarettes has been developed. Nicotine, 3-(1-methyl-pirolidin-2-yl) piridine, is a volatile base that its identification needs particular treatment. This research aims to determine the best condition of carbon paste electrode modified anthraquinone include composition, pH, and deposition time that could be applied in identifying nicotine from commercial cigarettes by cyclic voltammetry. The result shows that nicotine yields single oxidation peak at best composition of CPE-A 3:3:4 with the amount of anthraquinone is more than two other materials. Optimum pH at pH 9with deposition time 30 s. Quantity of nicotine in three cigarettes products A, B, C that measured with CPE-A voltammetrically were 0.62; 1.12; 1.24 mM, consecutively. The result has been validated with another measurement. A measurement by HPLC shows not much different result with the average difference 0.074 M.
Perbandingan Model Linier Versus Analisis Vektor pada Gerak Grup Sunspot di Lintang Selatan dari Siklus Matahari Ke-23 Widodo, Nanang
Sains & Matematika Vol 1, No 2 (2013): April, Sains & Matematika
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Comparison of the two models aimed to get a representative model that can explain the movement of sunspot groups in southern latitudes on the solar cycles 23th. If the movement of the daily sunspot groups is projected in the longitude and latitude direction, then it can considered as vector Ri. The evolution of sunspot groups during n days can be implemented into n-1 vectors and total vector of Ri is the resultant vector, R. Commonly, the movement of sunspot groups shift to positive or negative latitude direction. If R divided by a long of evolution (= n days) obtained an average vector R= (± b°B, ± l°L) where, the magnitude of b is the average difference in degrees of longitude/day, and l is the average difference in degrees of latitude/day. Distribution of sunspot group position data from firstday until to n days can be approximated by a linear regression equation. In studying the trajectory characteristics of sunspot groups used sunspot data of classes H and J in the southern hemisphere of the disk solar observations BPD Watukosek from 1997–2008 (cycle 23). From the comparison of the above two models obtained the best linear trajectories of a sunspot group. This result accordingly to the properties of differential rotation at the solar surface. Where at the lower latitude sunspot group will move relative faster than higer latitudes. The results of modeling can be used to interpolate to data that is not observed and extrapolated to predict the position of a sunspot group on the next day. 
Profi l Hormon Estrogen Induk Ikan Lele (Clarias sp.) yang Diinduksi Laserpunktur Setelah Pemberian Pakan dengan Berbagai Kadar Protein Hariani, Dyah
Sains & Matematika Vol 3, No 1 (2014): Oktober, Sains & Matematika
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Induksi laserpunktur berkekuatan rendah di titik reproduksi induk lele betina dapat memacu produksi hormon gonadotropin (GtH). GtH-I berperan dalam proses steroidogenesis normal untuk memproduksi estrogen. Untuk mendukung produksi estrogen dibutuhkan nutrisi induk yang cukup terutama protein. Namun profi l hormon estrogen yang dihasilkan dari berbagai kadar protein pakan induk dan induksi laserpunktur belum diketahui. Tujuan penelitian ini untuk menguji peningkatan kadar estrogen lele yang diberi pakan dengan berbagai kadar protein dan induksi dengan laserpunktur. Penelitian faktorial ini terdiri atas faktor I: induksi laserpunktur dan tanpa induksi laserpunktur dan faktor II: kadar protein pakan (30, 35 dan 40%) dengan rancangan penelitian rancangan acak kelompok dengan empat ulangan. Induksi dengan laserpunktur dilakukan seminggu sekali selama 8 minggu. Ikan uji sebanyak 172 ekor induk lele betina matang gonad pertama kali memijah dengan bobot badan 900-1500 gram dengan umur sekitar 1-1,5 tahun. Darah diambil dari empat ekor induk/perlakuan pada minggu ke-0, ke-2 hingga minggu ke-8, dan selanjutnya diuji menggunakan metode ELISA. Analisis data kadar estrogen dengan Anava menggunakan program SPSS Software versi 17.0. Hasil penelitian menunjukkan induksi laserpunktur dan pemberian berbagai kadar protein pakan induk lele meningkatkan kadar estrogen (P < 0,000). Induksi laserpunktur dan pemberian pakan dengan kadar protein 40% pada minggu ke-3 menghasilkan kadar hormon estrogen tertinggi. Induction of laserpuncture Helium-Neon a low powered at the point of reproductive broodstock cafi sh can stimulate the production of gonadotropin hormone (GtH I). GtH-I plays a role in normal steroidogenesis process for producing estrogen. To support the production of estrogen needed suffi cient broodstock nutrients, especially protein. However, the profi le of estrogen producted from various dietary broodstock protein levels and induction laserpuncture broodstockis unknown.The purpose of this study was to examine the increase in estrogen hormone level catfi sh dietary with different levels of protein and induced by laserpuncture. The factorial experimental consisted of factor I: induction of laserpuncture and without laserpuncture and factor II: dietary protein levels (30, 35 and 40%) conducted based on randomized completely block design with four replications. Induction of laserpuncture was done once a week for eight weeks. The tested fi shes consisted of 172 were mature gonad female catfi sh fi rstly spawning with 900-1500 g body weight to about 1-1.5 years old. The estrogen hormone level in the blood samples taken on 0, 2nd up to 8th week were analyzed by using ELISA method. The levels of estrogen were analyzed by ANOVA using SPSS Software version 17.0. The results showed that laserpuncture induction and dietaring protein levels of catfi sh broodstock can increase the estrogen hormone levels (P < 0,000). Induction of laserpuncture and dietaring protein level of 40% at week 3 revealed the highest levels of the estrogen.
Monitoring Perdagangan Invertebrata Laut sebagai Spesimen Akuarium di Surabaya Indrawati, Putri; Tanziyah, Lia Li Anatus; Widiyawati, Eka
Sains & Matematika Vol 4, No 2 (2016): April, Sains & Matematika
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Saat ini perdagangan hewan invertebrata semakin marak, namun belum ada data tentang jenis-jenis hewan tersebut serta bagaimana status konservasinya. Penelitian ini bertujuan mengidentifikasi jenis-jenis invertebrata laut sebagai spesimen akuarium yang diperdagangkan di Pasar Ikan Gunung Sari, Surabaya; mendeskripsikan status perlindungan invertebrata laut; mendeskripsikan cara perolehan (asal) hewan invertebrata laut yang diperdagangkan; serta mendeskripsikan keterlibatan masyarakat dalam perdagangan invertebrata laut sebagai spesimen akuarium Pasar Ikan Gunung Sari, Surabaya berdasarkan alasan pembelian, frekuensi pembelian, dan pengetahuan masyarakat tentang hewan yang dibeli. Penelitian dilakukan dengan menggunakan metode observasi hewan yang diperdagangkan dan wawancara terhadap pedagang dan pembeli hewan invertebrata. Terdapat 29 spesies invertebrata laut yang diperdagangkan sebagai spesimen akuarium di Pasar Ikan Gunung Sari Surabaya, tiga di antaranya termasuk hewan dilindungi. Selain itu, terdapat empat spesies yang termasuk kategore Least Concern menurut IUCN adan 15 spesies termasuk apendiks II CITES.Nowadays, the trading of invertebrate animals are increasing, however there is no data about the species of these animals and the status of their conservation. The purposes of this research were to identify the sea invertebrates as specimen of aquarium traded in Pasar Ikan Gunung Sari, Surabaya; describe the conservation status of sea invertebrates; describe the origin of those traded animals; and describe the role of the society in the trading of aquarium specimen in Pasar Ikan Gunung Sari, Surabaya based on the reason of the purchase, the frequency of purchase, and the knowledge of peoples about animals that they bought. This research conducted using observation methods, namely by observing of the animals that are traded and conducted interviews to the traders and buyers of invertebrates. In Pasar Ikan Gunung Sari, there were four shops that sell sea invertebrates. There were 29 species of sea an invertebrate are traded and was found three species of them were protected based on Government Regulations. In addition, there were four species which were classified as Least Concern according to IUCN and 15 species which were classified as Appendix II according to CITES. The sea invertebrates are obtained from suppliers routinely from the sea in Banyuwangi, Situbondo, Bali and Papua. The buyers were sea animal’s lovers who collected sea invertebrates to decorate their aquariums, but they do not know the conservation status protected of the animals.
Potensi Tepung Tempe sebagai Estrogen Alami terhadap Uterus Mencit Premenopause Primiani, Cicilia Novi
Sains & Matematika Vol 1, No 2 (2013): April, Sains & Matematika
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Syntetic estrogen hormone is commonly used by women by and in their menopause cycle to overcome the problems related to menopause. Women make use of this syntetic estrogen hormone for a reason that it is easy to get, cheap and its easy application. This syntetic estrogen hormone can eventually result in side-effects. Powder of tempe has become the natural stuff with isoflavon, a chemical blend which is sturcturally fit to estrogen hormone. The objective of this research was to measure the effect of tempe starch towards the endometrium uterus of mice. The research applied experimental approach with completely randomized design with one factor of the dossage of tempe starch by 0.2 g/kg, 0.4 g/kg, and 0.6g/kg. The samples were 24 female mice of 12 months, which were divided into 4 groups of treatment with 6 times of application. The tempe powder was applied for 24 days. Surgery was was done on the 25th day. Histology of uterus was made under colouring technique of Hematoxilin Eosin (HE). The results showed that there were miometrium uterus and uterine gland proliferation. Based on the result, can be concluded that tempe powder can be used as natural estrogen. 

Page 7 of 20 | Total Record : 198

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