Jurnal ILMU DASAR
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Palm Cooking Oil Refraction Index Measurement Using Single Slit Fraunhofer Diffraction Method
No full textPalm cooking oil refraction index measurement has been done in several temperature using single slit Fraunhofer diffraction method. Ratio between diffraction patterns at the air dan solution medium can be used to determine its refraction index. Using aquades as sample, was obtained refractive index 1.331 with the discrepancy 0.038%. Based on the refractive indexs measured for each temperature were obtained linear equation model: Y=-(0,00145±0,00021)X+(1,54232±0,01757)where R = -0,97266 and R^2=0,94606. Temperature changes influence strongly to refractive index changes of palm cooking oil sample, changes both inversely. Gradient of 0.00145 indicate that refractive index of palm cooking oil sample decrease slowly, so the quality is still good.  Keywords : Palm Coocing oil, refractive index, temperature, Fraunhofer diffraction metho
Parasitoid Diversity of Whitefly and Aphid of Soybean
Get PDFThe research of parasitoid diversity of whitefly and Aphid on soybean were conducted at District of Lumajang from Juni to Agustus 2013. The objectives of this research were to study  the biodiversity, abundance and parasitism of whitefly and Aphid parasitoid of soybean. Measurement of insect diversity was calculated using Shannon’s index. The result Showed, i.e. polynema sp (Hymenoptera: Mymaridae),  Eretmocerus sp, Encarsia sp Aphelinus sp. (Hymenoptera: Aphelinidae) and Aphidius sp (Hymenoptera: Aphididae). Parasitoid were abundance in whitefly and aphid popular a soybean which is becomes a potential biocontrol  pest management of whitefly and Aphid a soybean Keywords: Aphid , diversity, parasitoid, whitefl
Super (a, d)-Edge Antimagic Total Labeling of Connected Ferris Wheel Graph
Get PDFLet G be a simple graph of order p and size q. Graph G is called an (a,d)-edge-antimagic totalifthereexistabijectionf :V(G)∪E(G)→{1,2,...,p+q}suchthattheedge-weights,w(uv)= f(u)+f(v)+f(uv); u, v ∈ V (G), uv ∈ E(G), form an arithmetic sequence with first term a and common difference d. Such a graph G is called super if the smallest possible labels appear on the vertices. In this paper we study super (a, d)-edge antimagic total properties of connected of Ferris Wheel F Wm,n by using deductive axiomatic method. The results of this research are a lemma or theorem. The new theorems show that a connected ferris wheel graphs admit a super (a, d)-edge antimagic total labeling for d = 0, 1, 2. It can be concluded that the result of this research has covered all feasible d. Key Words : (a, d)-edge antimagic vertex labeling, super (a, d)-edge antimagic total labeling, Ferris Wheel graph FWm,n. Â
The Inventory of Bamboo in Antirogo Sub-district Sumbersari District Jember Regency
No full textAntirogo is a sub-district of Jember district, it's surrounding citizen utilize bamboo for daily needs such as building materials, agricultural equipment, bridges, vegetables and crafts. The continuous utilization is not accompanied by efforts of cultivating so that will have impacts on a population decline and preservation of them. Then it needs to do an inventory of bamboo in Antirogo. This research was conducted on March to September in 4 villages (Krajan, Trogowetan, Pelinggian, and Jambuan) used the exploration method. The results showed that 11 species of bamboo which consists of 4 genus (Bambusa, Dendrocalamus, Gigantochloa, and Schizostachyum) i.e. Bambusa blumeana Bl. ex Schult., Bambusa maculata Widjaja, Bambusa vulgaris Schard. ex J.C., Bambusa vulgaris var. striata (Lodd. ex Lindl.), Dendrocalamus asper Backer, Gigantochloa apus Kurz, Gigantochloa atter (Hassk.) Kurz ex Munro, Gigantochloa sp., Gigantochloa pseudoarundinacea (Steud.) Widjaja, Schizostachyum silicatum Widjaja, dan Schizostachyum zollingeri Steud. Keywords: Antirogo, Bamboo, Inventory, Poaceae
Ephypitic Ferns (Pteridophyta) from Raung Mount Banyuwangi, East Java Indonesia
Get PDFAn investigation of epiphytic Pteridophytes diversity at Mount Raung, Banyuwangi, East Java Province, Indonesia, was carried out in 7 February 2015. As many as 11 Pteridophytes from 3 families had been identified based on their morphological chracteristic. Among them, four species of Family Aspleniaceae, including Asplenium confusum Tardieu & Ching, Asplenium nidus L., Asplenium salignum Blume, and Asplenium tenerumoides S.B.Andrews. Polypodiaceae include Leptochilus wrightii (Hooker & Baker) X. C. Zhang, Microsorum punctatum (L.) Copel., Pyrrosia bicolor ( Kaulf. ) Ching, and Schellolepis percussa (Cav.) Pic.Serm. Vittariaceae include Antrophyum formosanum Hieron., Vittaria ensiformis Sw., and Vittaria lineata (L.) Sm. which is the smallest specimen with less than 10 cm long.Keywords: Mount Raung, Pteridophyta, Epiphytic, Families.Â
Induction Somatic Embryogenesis Used 2,4-Dichlorophenoxyacetic Acid (2,4-D) and Kinetin in Spindle Leaf Explant Sugarcane
Get PDFInduction of somatic embryogenesis in sugarcane requires the composition Plant Growth Hormone (PGH) appropriate. Utilizing of PGH (2,4-D and kinetin) is expected to induce sugarcane somatic embryogenesis. The purpose of this study was to obtain the concentration of 2,4-D and kinetin that effective for the multiplication of sugarcane var. NXI 1-3 through somatic embryogenesis. This study consists of four stages: callus induction, callus proliferation, regeneration of shoots and encapsulation. The plant material used is a spindle leaf sugarcane var. NXI 1-3. Callus induction used 2,4-D with different concentration (2 ppm, 3 ppm and 4 ppm). Callus proliferation used 2,4-D with concentration 1 ppm and 2 ppm. Regeneration of shoots used kinetin 0,5 ppm. The results are showed that the optimal induction of embryogenic callus on medium MS + sucrose 30 g / L + CH 300 ppm + 300 ppm PVP + 2,4-D 4 ppm as indicated by the high percentage of explants forming embryogenic callus that is equal to 40% and the respective concentration 2 ppm and 3 ppm is 33,3% and 37,5%. In proliferation stage, the development callus optimal on medium MS + sucrose 30 g / L + CH 300pm + PVP 300 ppm + 2,4-D 2 ppm and formulations for regeneration shoot on medium MS + sucrose 30 g / L + kinetin 0.5 ppm. The result of encapsulation can be shaped 100 sythetic seed. Keywords: Somatic embryogenesis, spindle leaf, kinetin, 2,4-
The thermal annealing effect on Crystal Structure and Morphology of Titanium Dioxide (TiO2) powder
Get PDFIn this research, crystal structure and morphology of TiO2 (powder) has been observed. TiO2 (powder) was heated by furnace unit at temperature 200 °C - 400 °C to obtain the relation of temperature influences to crystallty and morphology of TiO2. Structural characterization has been done using XRD whereas morphology using Scanning Electron Microscope (SEM) method. The result of this research showed that form of the TIO2 structure was polycrystalline in which mostly dominated by crystal structure (101). Scherrer method used to obtain information that at temperature 300oC, TiO2 has a real small particle size less than 10 nm and large pore size to serve the purpose of photocatalyst material. Keywords : Crystal structure,crystalline size, photocatalyst, morphology, SEM, TiO2. Â
The Efficiency of First (GEE1) and Second (GEE2) Order “Generalized Estimating Equations†for Longitudinal Data
Get PDFThe approach of GEE focuses on a linear model for the mean of the observations in the cluster without full specification the distribution of full-on observation. GEE is a marginal model where is not based on the full likelihood of the response, but only based on the relationship between the mean (first moment) and variance (second moment) as well as the correlation matrix. The advantage of GEE is that the mean of parameter are estimated consistently regardless whether the correlation structure is specified correctly or not, as long as the mean has the correct specifications. However, the efficiency may be reduced when the working correlation structure is wrong. GEE was designed to focus on the marginal mean and correlation structure as nuisiance treat. Implementation of GEE is usually limited to the number of working correlation structure (eg AR-1, exchangeable, independent, m-dependent and unstructured). To increase the efficiency of the GEE, has introduced a variation called the Generalized Estimating Equations order 2 (GEE2). GEE2 has been introduced to overcome the problem that considers correlation GEE as nuisiance, by applying the second equation to estimate covariance parameters and solved simultaneously with the first equation. This study used simulation data which are designed based on the the AR-1 and Exchangeable correlation structure, then estimation are done  using theAR1 and exchangeable. For GEE2,  estimation done by adding model for correlation link. The result is a link affects the efficiency of the model correlation is shown with standard error values ​​generated by GEE2 method is smaller than the GEE method
Analysis of Groundwater Decline and Land Subsidence by using of Microgravity and Vertical Gravity Gradient Over Time Method
Get PDFStudies have been conducted to identify the occurrence of subsidence, a decline of groundwater, and to model the causes of subsidence in areas of Jakarta based on response of microgravity anomaly and vertical gravity gradient over time. Based on the processing and interpretation of gravity data advance of the time concluded that by using a combination of time lapse microgravity and its vertical gradient have been able to localize the source of the gravity anomaly and the results are strongly support the results of filtering to separate the source of the anomaly. The subsidence that occurs predominantly due to resettlement (in West and North Jakarta), caused by the extraction of groundwater and resettlement (in Central and East Jakarta), and dominated due to the extraction of groundwater (in South Jakarta).Keywords : Groundwater, time lapse micogravity, time lapse vertical gradient, resettlement, subsidenc
Determination of Sesame Oil Quality UsingFraunhofer Difraction Method: Refraction Index as a Temperature Function
Get PDFTelah dirancang alat uji kemurnian bahan yang bekerja berdasarkan metode difraksi Fraunhofer celah ganda. Metode ini mempunyai akurasi yang baik, tidak memerlukan bahan uji dalam jumlah banyak serta tidak merusak kemurnian bahan uji itu sendiri (non destructive testing/non contactive testing). Pengujian dilakukan dengan menentukan persamaan indeks bias sebagai fungsi suhu bahan uji, yang diperoleh berdasarkan perubahan pola frinji gelap terang difraksi cahaya yang melewati bahan uji untuk variasi suhu yang diberikan (26 °C hingga 90 °C). Dari persamaan indeks bias yang diperoleh kemudian dapat dihitung indeks bias pada suhu sembarang. Uji kemurnian dilakukang dengan membandingkan nilai indeks bias terukur dengan nilai indeks bias referensi pada suhu tertentu. Uji statistik t-test digunakan untuk melihat tingkat akurasi alat. Pada penelitian ini digunakan tiga buah merk minyak wijen yang ada di pasaran. Dari hasil pengukuran dan perhitungan menggunakan minyak wijen tiga macam (A,B dan C) dapat diketahui bahwa dari ketiga bahan uji yang dipilih maka minyak wijen label B memiliki nilai t hitung yang paling kecil dibandingkan minyak wijen label A dan C, sehingga minyak wijen label B dianggap memiliki kualitas yang paling baik dia antara ketiga minyak wijen yang telah di uji. Keywords: Difraksi Fraunhofer, minyak wijen, indeks bias bahan, uji-t Â