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SAMPUL JURNAL, DEWAN REDAKSI, KATA PENGANTAR, DAFTAR ISI, PEDOMAN BAGI PENULIS EKSAKTA
MULTIFIKASI TUNAS ANGGREK LARAT (Dendrobium phalaenopsis Fitzg) DENGAN PEMBERIAN HORMON IAA DAN BAP TERHADAP PERTUMBUHAN SECARA IN VITRO
ABSTRACT Larat orchid (Dendrobium phalaenopsis Fitzg) is orchid a rare native orchid from Maluku. The advantage of this orchid are has many color of petals and has resistant from water shortage. This research aims to determine the effect by using IAA and BAP hormones as well as to get a combination of IAA and BAP hormones for the best shoot growth of explants D. phalaenopsis Fitzg orchid with in vitrofertilisation. The results showed when shoots appear parameters is significant effect on single hormone of IAA and BAP hormones, while the number of shoots parameters showed only a single treatment of IAA hormone are significant, then the percentage of live explants parameter was not significant. Based on the results of this study concluded that the best combination of IAA and BAP hormones to produce the fastest emerging shoots isI0B3 treatment and to produce the highest number of shoots isI1,5B1treatment. Keywords: Multification shoots,IAA, BAP, In vitro
ANALISIS RAPAT DAYA KELUARAN (POWER DENSITY) SUPERCRITICAL WATER REACTOR (SCWR) TERHADAP VARIASI DESAIN TERAS REAKTOR
ABSTRACT There are two possible alternative energy sources nowadays, namely renewable energy sources and nuclear energy source. Nuclear energy has a promising potential associated with large power generated and environmentally friendly (in the context of normal operation). Currently being developed some new reactors generation IV to replace reactors generation III that are currently operating and had almost reached the shut down period. One of the candidates in Generation IV nuclear reactors is Supercritical Water Reactor (SCWR). The study was conducted to obtain the reactor core design that has the most optimal for SCWR operation that produces maximum power than others. The results obtained, namely the composition for type I numerically assembly provides output power of 3575.15 MWT with an error of 0.00062%, while the composition of the assembly for type II numerically provide output power at 3269.17 MWT with an error of 0.00057%. The composition of type I provides greater power than the composition of type II but lack of stability than type II. Keywords : Supercritical, Nuclear, Reactor, SCWR, Power Density, Numerical method
POTENSI MINERAL BATUAN TAMBANG BUKIT 12 DENGAN METODE XRD, XRF DAN AAS
ABSTRACT The mining area of Bukit 12 Mandailing Natal (Madina) was used as a gold mining public. Based on the physical properties of the rock could be estimated the potential of other minerals contents. Therefore, research is to identify the other material in rock. The methods of identify process are X-Ray Fluorescence (XRF), X-Ray Diffraction (XRD) and Atomic Absorption Spectrophotometer (AAS). The result of measurement by XRF method shows that mineral elements in rocks mining composed by 62.176% Si, 21.997% Al, 6.81% C, 4.193% Fe, 2.884% Cu, while the oxide are 66.66% SiO2, 25.240% Al2O3, 3.292% K2O, Fe2O3 2.201% and 1.257% CuO. The result of measurement by using XRD method describe that rock mining produces the highest peak to indicate SiO2 about 75%, Gold (Au) 21% and copper (Cu) 4%. Furthermore, AAS method shows the mineral elements / compounds contained in the rock are 1.77% Fe, 1.16% Cu, 90.43% SiO2% and 2:05.% Al2O3. The results of three methods identify that rock mining in Bukit 12 contain dominant minerals namely silicon oxide (SiO2), Cu, Fe and Al (Al2O3). Keywords: Batuan tambang, X-ray Flouresence(XRF), X-ray Diffraction (XRD), Atomic Absorption Spectrofotometer(AAS).
ANALISIS KESALAHAN TRANSFORMASI SOAL PADA KEMAMPUAN REPRESENTASI MATEMATIS SECARA SIMBOLIK
ABSTRACT Lack of mathematical ability can cause difficulties in solving mathematical problems for students. The difficulties can be seen from their mistakes in mathematical representation either on visual, symbolic or verbal when completing mathematical problems. This study interested in analyzing error in transformation aspects of problems in the mathematical representations ability of symbol and find out the causes of mistakes. To answer that, we conducted field research with 25 students in VIII4 class MTsN Sunggayang in the form of descriptive research. Students were given a designed test to measure their representations ability to solve problems. Interviews were conducted on students who did mistakes in answering mathematical problems. The data were analyzed with data tabulation procedures, analyzing test results, reducing data, presenting data and drawing conclusions. In general, students' mistake is inability to choose and to use the right method or formula to answers the problems. As a result they perform incorrect calculations and get the wrong answer. That happens because they unfamiliar with solving transformational problems activity. Keywords: Mathematical representation ability, Error in transforming the problem in symbol, Incorrect Calculation
ANALISIS KUALITAS UDARA DI DAERAH PENAMBANGAN BATU KAPUR BUKIT TUI KOTA KOTA PADANG PANJANG
ABSTRACT The research was conducted at Bukit Tui Limestone quarry Padang panjang city. The purpose of : 1) To control air pollution and 2) The achievement of the indoor air quality ambient for human healty and other living creatures. The designed of the research was descriptive study with standard reference SNI 19-7119.3-2005 ambient air part 3 : The way the particles suspended by using tools Hight Volume Air Sampler (HVAS) with gravimetric method and air sampling tools (Impinger). Analysis quality the air is done to some parameters like : SO2, CO, NO2, O3 and TSP with 12 hours time measurement. The results showed for some parameters is TSP 29,2 μg/Nm3 comparing BKMU 230 μg/Nm3, NO2 55,74 μg/Nm3 comparing BKMU 150 μg/Nm3, SO2 38,12 μg/Nm3 comparing BKMU 365 μg/Nm3, CO 1230 μg/Nm3 comparing BKMU 10.000 μg/Nm3 and O3169,3 μg/Nm3 comparing BKMU 235 μg/Nm3. From these result can be seen that air quality in 2015 quite good because no paramaters exeed the quality standard of air quality (BKMU). Pollution of aircan give a positive and negative impact for human and other living creatures. To be able to tackle air pollution can be done some ways including greening to carry out photosynthesis process (the park is acting as the lungs of the city) Keywords : Analysis, Air Quality, Limestone, Padang Panjang city
MORFOLOGI SERBUK SARI PADA BEBERAPA VARIASI WARNA MAHKOTA BUNGA Caesalpinia pulcherrima (L.) SWARTZ
ABSTRACT The structure of pollen has great variations in a species. Pollen characters useful in phylogenetic and taxonomic studies of plants. The purpose of this studies was to determine the morphology structure of pollen on some variations colour of corolla Caesalpinia pulcherrima (L) Swartz. Pollen morphology have been examined by digital microscope and Scanning Electron Microscope (SEM). Pollen characters observed was unit, polarity, symmetry, size, shape, ornamentation, number and type aperture. From this research, pollen grains found from variations C. pulcherrima (L.) Swartz has single pollen grains or monad, polarity isopolar, radial symmetry, and size categories large. The length of polar axis (P) 58.16 to 74.11 μm, the length of the equatorial diameter (E) 59.86 to 75.97 μm, so that pollen grain shape was called Oblate Subspheroidal Spheriodal and Subspheroidal Prolate Spheriodal. Ornamentation of C. pulcherrima (L.) Swartz was reticulate. Aperture 3, the type pores and located in the equatorial. From these data can be concluded that pollen from variations colour of corolla C. pulcherrima (L.) Swartz has same in terms of unit, polarity, symmetry, size, and type aperture, but its different in terms of shape. Keywords: Pollen, Corolla, Caesalpinia pulcherrima (L.) Swartz
IMPLEMENTASI BUKU TEKS FISIKA BERMUATAN KECERDASAN KOMPREHENSIF PADA PEMBELAJARAN PESERTA DIDIK KELAS X SMA KOTA PADANG MENGGUNAKAN PENDEKATAN SAINTIFIK
ABSTRACT Implementation of the 2013 curriculum does not in all level school until now. One factor causes this problem is the availability of suitable books to support the achievement of all competencies such as religious, social, knowledge and psychomotor. The goal of this research is to know the impact of the physics textbook contain comprehensive intelligence to competencies achievement. The physics textbook as treatment object in this research has been developed and very high validity and very high practicalities. The type of research is true experiment with the posttest-only control group design. Implementation of the physics textbook contain comprehensive intelligence has been conducted at four SMAN like SMAN 1 Padang, SMAN 3 Padang, SMAN 4 Padang and SMAN 10 Padang. The result of research is the physics textbook contain comprehensive intelligence can be predicted to incease the religious, social, knowledge and psychomotor competencies. The reason of this prediction is experiment and control groups of all school have the same competencies before the treatment to do. Keywords: Physics textbook, Comprehensive intelligence, Core competencies, Scientific approach, Implementation of the 2013 curriculum.
PENGARUH LKS BERORIENTASI LIFE SKILLS DAN KEMAMPUAN AWAL TERHADAP KOMPETENSI FISIKA SISWA DALAM PEMBELAJARAN SCIENCE ENVIRONMENT TECHNOLOGY SOCIETY (SETS)
Abstract A factor encountered learning is that students do not have the life skills that are needed to be in the community. The real impacts of these problems are the lack of student learning outcomes, whether in the cognitive, affective and psychomotor. This research aimed to investigate the influence of Students’ Worksheet (LKS) life skill oriented and early ability toward the students’ physics prior outcome in learning Science Environment Technology Society (SETS). This research was quasi-experimental research design with research using Treatment by Block 2x2. The populations of the research were all students of class X SMA N 1 Koto XI Tarusan at the second Semester of 2012/2013 academic year. Sampling technique is cluster sampling, so the X2 class was selected as the experimental class that uses LKS life skills-oriented and class X3 as a control class that uses non-life skills worksheets. The data of this research were taken in the form of prior knowledge data, cognitive, affective and psychomotor. The result of the research indicate that first, there is an effect LKS life skills oriented towards learning outcomes. Second, there is influence oriented life skills worksheets for high ability students’ start on learning outcomes. Third, there is influence Worksheet life skills oriented for low ability students start on learning outcomes. Fourth, there is no interaction between the use of oriented life skills worksheets and student’s early ability influences the students’ physics outcomes. Keywords: Life Skills, Worksheet, Initial Competence, Learning Model Science Environment Technology Society (SETS)
PENGARUH SUHU DAN WAKTU PELAPISAN TEMBAGA PADA BAJA KARBON RENDAH SECARA ELEKTROPLATING TERHADAP KOROSI
ABSTRACT A research was done on steel coated with copper by electroplating with variations in the temperature and the electrolyte solution concentration. Corrosion on metal resulted in quality decrease and material losses. One of the efforts to protect metals against corrosion is by applying the electroplating principle. Electroplating is a way of coating the metal by using electric current.In Electroplating, electrical energy is converted into chemical energy in the electrolytic cell. The purpose of this research was to find out the resistance of low carbon steel against corrosion by variations in the temperature and the electrolyte solution concentration. In this research, electroplating of low carbon steel with copper was done at 9 volts electric voltage with time variations on 10, 20, and 30 minutes at 450C, 550C and 650C temperature.Corrosion test was done by immersing the test specimen in a container contained NaCl with 5% NaCl concentration to subtitute seawater for 5 days (Abdul LatifMurabbi). Based on the research result, it was concluded that the time difference of copper coating on low carbon steel by electroplating with variations in time and temperature resulted in unevenly layers. However, gradual correlation between temperature and time of copper coating on low carbon steel was not found. It is similar with the resistance of low carbon steel coated by copper by electroplating with variations of temperature and time which did not have gradual correlation with the resistance against corrosion, however, significance difference was found on steel not coated with copper. Therefore, further research related to iron and copper compounds using other methods but electrochemistry needs to be conducted. Keywords : Temperature, Time, Copper Layer, Carbon Steel, Electroplating,
POTENSI PENGEMBANGAN AIR TERJUN TUJUH TINGKAT DI KOTA PADANG PANJANG
ABSTRACT Tourism object of Air Terjun Tujuh Tingkat is a new want to development in Kota Padang Panjang, its have economic potential, it must be based on the principles of ecotourism development of ecotuourism, in order to provide sustainable benefit. The aims of the research to analyze elements of tourism management and the role of government, to formulate tourism development strategy of Air Terjun Tujuh Tingkat, Kampung manggis, Kota Padang Panjang on November 2015. This research approach is qualitative. Data analysis technique was descriptive qualitative. Data were collected from observation, interviews, anddocumentation. Respondent in this survey was selected through purposive sampling. Result of the survey shows there are two acsess to get Air Terjun Tujuh Tingkat, and just with footpath mileage 45 minute. This location is compatible for tourist adventurous souls. Community surrounding waterfall absolutely depens on the plants surrounding their environment, and therefore there are opportunities to promotes conservation based on society. Keywords : Ecotourism, Kota Padang Panjang, Air Terjun Tujuh Tingkat, The Potential.
ISOLASI CENDAWAN ENDOFIT DAUN SITAWA (Costus speciosus Koen J.E Smith)DAN POTENSI SEBAGAI ANTI BAKTERI
ABSTRACT Endophytic fungus are microorganisms that live in the tissues of plants and produce secondary metabolites similar to its host. Isolates of endophytic fungi could be obtained from various plants, one of the leaves Sitawa (Costus speciosus (Koen.) J.E Smith). Costus speciosus its potential as a drug, because the content of diosgenin compounds, tannins, steroids, alkaloids and phenols which are secondary metabolites and acts as an antibacterial. This study aims to determine isolates of endophytic fungi found on leaves of Costus speciosus and its potential as an antibacterial against Staphylococcus aureus. The research was conducted from May to June 2016 in the Laboratory of Microbiology Department of Biology, Mathematic and Sains of Faculty Padang Univercity. This study was a descriptive study with endophytic fungi isolated from leaf Costus spesiosus and test the antibacterial potency against Staphyllococcus aureus. The parameters observed in determining the outcome of insulation seen from the colony color, form colonies and the establishment of clear zone on the test results as an antibacterial potency.Endophytic fungi isolation research results obtained three types of isolates that isolates the CS-1, CS-2 and CS-3. To test the potential as an antibacterial obtained clear zone with the average - average isolates CS-1 (12.1 mm), Isolate CS-2 (12.5 mm) and Isolate CS-3 (9.7 mm). 3 endophytic fungi isolates obtained from the leaves of Costus speciosus that have potential as an antibacterial. Keyword : Endophytic fungi, Costus speciosus, Staphyllococcus aureus
DESAIN PERANGKAT PERKULIAHAN FISIKA STATISTIK BERBASIS KKNI DENGAN PENDEKATAN KONSTRUKTIVIS
ABSTRACT Needs analysis indicates that the performance of lecturers, social climate, student competence, soft skills of the workforce and difficulties level of students who listed statistical physics courses are in enough category (based on the front-end analysis). Based on analysis of learner characteristics shows that students: (1) 57.14% had a good start capability, (2) 40,74% less material achievement in statistical physics, (3) 40.72% requires deeper understanding for repetition, exercises and structured tasks, (4) 100% environmental influences in students achievement. Analyzed results of students’s task show that: (1) group study and repetition of lectures material needs to be improved, (2) the tasks that assigned are in accordance with standard competency. Futher understanding of the student in lectures material of statistical physics needs to be improved gradually and structured (analysis result of the lectures material). In addition, the demands of higher education curricula oriented to the working demand related KKNI (National Qualifications Framework Indonesian) also needs to be achieved by students. The research objective is to design learning materials of statistical physics based on KKNI with a constructivist approach which has valid criteria. This study uses 4-D models (Define, Design, Develop and Disseminate) and has reached on Design phase. Data was collected by questionnaire. The analysis technique used to processing data is the percentage technique. The results of the research are the expert appraisals of the lectures materials that have been designed. Syllabus validation results given average value 94,58 percent, validation lesson plan averaged 93,29 percent, validation for handout showed an average value 90,89 percent, and the results of the validation assessment sheet showed an average value 93,75 percent. Conclusion of research is design of learning materials of statistical physics based on KKNI with a constructivist approach has been reach valid criteria. Keywords: Learning materials, Statistical Physics, KKNI, Contructivist Approach
PERSPEKTIF MAHASISWA TERHADAP PEER ASSESSMENT DAN SELF ASSESSMENT PADA MATA KULIAH METODOLOGI PENELITIAN PENDIDIKAN
ABSTRACT The aim of this study was to describe the peer and self assessment experperience from the viewpoint of the students in educational research methodology course. The data were collected by using questionnaire. The participants were the biology students of Padang State university which take the educational research methodology course. Analyses of the data collected demonstrate that students’ perspective about the peer and self assessment process were generally positive. Keywords: peer assessment and self assessment, Education Research Methodology.
SOLUSI NUMERIK PERSAMAAN KORTEWEG-DE VRIES BURGERS DENGAN METODE SPEKTRAL
ABSTRACT The Burgers Korteweg-de Vries equations have widely applications in fluid mechanics, physics and engineering. By assume that the solutions of the KdVB equation are be able to presented as the sum of some periodic waves, the solutions of the KdVB can be transformed into spectral space. In this paper, the numerical solutions of the KdVB equation by using spectral methods are discussed. By using FFT and IFFT syntax the KdVB equation solved numerically. By using this solution we investigate that if the dissipative coefficient going smaller then the solitary wave will be dispersed. Keywords: KdV, KdVB, Spectral Method, Solitary Wave
EFEKTIFITAS PENGGUNAAN MULTIMEDIA PEMBELAJARAN DAN LKS LAJU REAKSI UNTUK MENINGKATKAN HASIL BELAJAR KIMIA SISWA KELAS XI IPA SMA
ABSTRACT Reaction rate as one of the subject in chemistry must be understand by senior high school students in three level of representation. All three level of representation include: macroscopic level, microscopic level and symbolic level. The understanding of macroscopic level usually done through laboratory’s experiment, demonstration in front of the class, or field study, while for understanding microscopic and symbolic level can be done by using media during the process of learning. In this research, the learning of reaction rate was done using multimedia and worksheets to teach the concepts through 3 level of representation with the help of computer technology. The purpose of this study was to know the effectiveness of using multimedia and student worksheet (LKS) in learning reaction rate for senior high school student. This research is a pre-experimental research which used one group pretest - posttest design. The study population was all students of class XI IPA in senior high school of Nurul Ikhlas Padang Panjang. Samples were selected by using random sampling techniques, thus obtained XI IPA 2 class as the experimental class. Data in the form of students learning outcomes in the cognitive domain are analyzed using the McNemar test. The results showed that student learning outcome whose using multimedia and LKS in learning reaction rate increased significantly. This can be seen from the mean value which obtained by the students during posttes is 87.5. This value is better than minimum completeness criteria (KKM) in that research school which is 80. In conclusion, multimedia and student worksheets (LKS) that are used in learning reaction rate effective in improving student learning outcomes Keywords : Media’s Effectivity, Reaction Rate, Multimedia, Student Worksheet, Learning Outcome