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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 12 Documents
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Search results for , issue "Vol 1, No 1 (2012): Oktober, Sains " : 12 Documents clear
ARTIFICIAL INTELLIGENCE BERBASIS PENGETAHUAN PEMAIN UNTUK REAL TIME TACTIC GAME MENGGUNAKAN KNOWLEDGE BASED ARTIFICIAL NEURAL NETWORKS Ibad, Muhammad Rofiul; Hariadi, Moch.
Sains & Matematika Vol 1, No 1 (2012): Oktober, Sains & Matematika
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Solution for the complexity problem of Artificial Intelligence (AI) on Real Time Tactic (RTT) game as one of the real-world simulation game requiresefective control system.Control system is in the form of a representative agent as a human player in anticipating the changes of the game states. In this thesis, control agent is built by applying a Knowledge Based System (KBS) based on the knowledge base related to human player action for goal achievement of the game. The construction of KBS inference is divided into two phases, which isdetermination of the case inlinguistic format of human players from the numerical values of complex states in the game, and selection of the appropriate tactic when a series of cases occur.Existanceof knowledge that is not deterministic as the basis of the inference process, requires adaptability of the agent through weighting system of knowledge and learning. KBS is mapped to Knowledge Base Artificial Neural Networks (KBANN) using certainty factor (CF) based back propagation as learning method. Inference is limited to the process of achieving main goal through controlling of attack and defense. The design of AI system is implemented in RTT Game ?The Cursed? through the shared interfaces of SPRING AI Game Engine. Testing against other static AI shows the ability of adaptation to changes in circumstances and improved quality control of the game by 0.017745641. These results fit expectations of human players who expect an improvement of playing quality in each session through the selection of appropriate goal achievement action. 
ANTIOXIDANT ACTIVITY OF JUICE OF LOCAL CULTIVAR SWEET POTATOES AS FREE RADICAL SCAVENGERS OF 1,1-DIPHENYL-2-PICRYLHYDRAZYL (DPPH) Palupi, Endah Sri; Mulyati-Sarto, Mulyati-Sarto; Pratiwi, Rarastoeti
Sains & Matematika Vol 1, No 1 (2012): Oktober, Sains & Matematika
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Sweet potatoes (Ipomoea batatas) are tuber that have high antioxidant activity. The determination of antioxidant activity based on as percentage of inhibition of free radical DPPH. The purpose of this research was to observe the activity of three local cultivars of sweet potatoes by using DPPH method and by using vitamine C as compparison. The measurement of antioxidant activity which performed on sweet potatoes juice and vitamine C with concentration 625 ppm, 1250 ppm, 2500 ppm, 5000 ppm and 10000 ppm by using free radical of DPPH 0,004% that was soluble in ethanol pa and then was measure by using spectrofotometer. Data were analyzed by using ANOVA and LSD (? = 0.05). The result of this research showed that the three cultivar of sweet potatoes juice have antioxidant activity and the purple sweet potatoes cultivar Biru Mangsi had the highest antioxidant activity, although lower than vitamine C. The highest of antioxidant activity were vitamine C, followed by purple sweet potatoe, yellow sweet potatoes (cultivar Kuning Madu) and white sweet potatoes (cultivar Kapasan). 
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. 
OPTIMASI PELARUT PENGEMBANG DALAM PEMISAHAN BENZIL ASETAT DARI EKSTRAK BUNGA TANAMAN MELATI Rinaningsih, Rinaningsih
Sains & Matematika Vol 1, No 1 (2012): Oktober, Sains & Matematika
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Jasmine plant flower (Jasminum sambac) have a range of benefits. The compounds of these plants which are useful for medicine are benzyl acetate, acetic acid and indole linalil. The objective of this research was to identify the best developer solvent. Solvents used to identify the developer who is benzene, chloroform, benzene - chloroform (1:1), benzene - ethyl acetate (19:1). Based on the amount of stain on TLC chromatograms and spectral similarity as determined by TLC - Densitometer brand Simatsu type CS - 930, the most appropriate developer solvent to identify the benzyl acetate from the extract of jasmine is chloroform (CHCl3). This is partly because the price matches or see imminent standard polarity of benzyl acetate with chloroform as a developer solvent is better than another developer solvents and mixed solvents other developers. [Index polarity of benzyl acetate = 4.3, benzene = 0, chloroform = 4.4, benzene-chloroform (1:1) = 2.2, benzene - ethyl acetate (19:1) = 0.215]. Hence, it can be concluded that the best developer solvent or mix developers solvent to separate the benzyl acetate from the extract of Jasmine is the developer solvent chloroform. 
PENAMBAHAN FLY ASH PADA KOMPOSIT POLIANILIN/HCL/FLY ASH Rosana, Nila; Putri, Nugrahani Primary
Sains & Matematika Vol 1, No 1 (2012): Oktober, Sains & Matematika
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In this study has been made composite between polyaniline as one of conductive polymers that has good conductivity by using fly ash as consequence getting a new material with a wider application. The aim of this research was to determine the effect of the addition of fly ash on the electrical properties of polyaniline/HCl/fly ash composite. The method of fabrication that we used to get synthesis of polyaniline was chemical oxidation while the composite of polyaniline/HCl/fly ash manufactured by using powder metallurgy, with a composition of 10%, 20%, 30% and 40% fly ash. The composite was tested using FTIR to find polyaniline functional groups, LCR meter (f = 50-106 Hz) to determine the electrical conductivity and dielectric constant of the composite, to find the content of fly ash was tested by using XRF, where as the morphology of the composite was tested by using SEM EDAX. Based on LCR?s results, the electrical conductivity increased and dielectric constant decreased. The maximum electrical conductivity of the composite reached on the composition 20% fly ash was 3.86 × 10-6 S/cm. The maximum dielectric constant at 20% fly ash composition reached 2.01 × 104. 
KEMUNDURAN KUALITAS PUPUK HAYATI RHIZOBIUM Prihastuti, Prihastuti; Harsono, A.
Sains & Matematika Vol 1, No 1 (2012): Oktober, Sains & Matematika
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This is a descriptive analytical research to describe the quality deterioration of Rhizobium bio-fertilizer product during storage. The material was used a Rhizobium bio-fertilizer in plastic packing, which was stored in an incubator by temperature of 28oC for nearly ten months. The results showed that there had been a defect in the sealing plastic and formed small holes, caused the contamination, evidently by the growth of bacterial colonies were diverse. The analysis of C, N, P and K content indicated that career matter of bio- fertilizer composition belong to the dignity of the high fertility to support microbial growing. Total population of microbes in Rhizobium bio-fertilizer of all observed samples >106 cfu/g, but could not be considered a total population of Rhizobium. The damage of sealing packing decreased of the moisture career matter and become a limiting factor to support microbial viability. It was recommended to use a better quality plastic with appropriate sealing system. 
VARIASI MOLARITAS H2SO4 PADA POLIANILIN/H2SO4 Chomari, Moch. Nur; Kusumawati, Diah Hari
Sains & Matematika Vol 1, No 1 (2012): Oktober, Sains & Matematika
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Synthetis of polyaniline has carried out using oxidation polymerization of aniline monomer to oxidant ammonium peroxydisulfat (NH)4S2O8 and H2SO4 as a source of proton doped. Variations in the molarity of H2SO4 conducted to determine of optimum polyaniline on electrical conductivity. Polyaniline samples were characterized by FTIR to determine the cluster function and the four-point probe method to determine the electrical conductivity. FTIR results showed that the samples were synthesized is polyaniline. Electrical conductivity test by used four point probe method showed higher acid molarity higher the electrical conductivity to the optimum. After reaching the optimum point, the electrical conductivity of polyaniline decreases followed by the molarity increases. Polyaniline has the most optimum conductivity of 1.833 S/cm when synthesized with 0.12 M H2SO4. 
KEKAYAAN JENIS LANDAK LAUT (ECHINOIDEA) FAMILI DIADEMATIDE DI PANTAI SELATAN KABUPATEN GUNUNG KIDUL Purnami, S.E.; Trijoko, Trijoko; Rarastoeti, Pratiwi
Sains & Matematika Vol 1, No 1 (2012): Oktober, Sains & Matematika
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Diadematidae is one of sea urchin families belongs to Class Echinoidea that can be found in intertidal zone untill deep sea. These sea urchins have long spines, and some of them are toxic spines. However, they have important ecological roles. This research aimed to identify the species richness of sea urchins that belong to Family Diadematidae in Pantai Selatan Gunung Kidul as well as describe their taxonomic characters. Specimens were collected from five beaches, namely Krakal, Kukup, Drini, Sepanjang, and Wediombo. Collected specimens were relaxated by using MgCl272% in sea water and the fixed by using 10% formalin in sea water. Finally, they were preserved in 70% Ethanol. Some morphological characters were observed carefully, namely shape and colour of spines, shape of test, shape of genital plate, the existance of orange ring, white spot and iridipore of apical system, interambulacral region, and number of pores. The results showed that there were five species of Diadematid sea urchis in Pantai Selatan Yogyakarta; they belong to two genus, namely genus Diadema dan genus Echinotrix. Genus Echinotrix and Diadema can be fount in Kukup, Wediombo, and Sepanjang, but can not be found in two others beach. 
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
Publisher : Sains & Matematika

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Abstract

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. 
Kemunduran Kualitas Pupuk Hayati Rhizobium Prihastuti, Prihastuti; Harsono, A.
Sains & Matematika Vol 1, No 1 (2012): Oktober, Sains & Matematika
Publisher : Sains & Matematika

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Abstract

This is a descriptive analytical research to describe the quality deterioration of Rhizobium bio-fertilizer product during storage. The material was used a Rhizobium bio-fertilizer in plastic packing, which was stored in an incubator by temperature of 28oC for nearly ten months. The results showed that there had been a defect in the sealing plastic and formed small holes, caused the contamination, evidently by the growth of bacterial colonies were diverse. The analysis of C, N, P and K content indicated that career matter of bio- fertilizer composition belong to the dignity of the high fertility to support microbial growing. Total population of microbes in Rhizobium bio-fertilizer of all observed samples >106 cfu/g, but could not be considered a total population of Rhizobium. The damage of sealing packing decreased of the moisture career matter and become a limiting factor to support microbial viability. It was recommended to use a better quality plastic with appropriate sealing system. 

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