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INDONESIA
SAINS DAN MATEMATIKA
Published by Universitas Diponegoro
ISSN : -     EISSN : -     DOI : -
Core Subject : Education,
Mathematics
Arjuna Subject : -
Articles 5 Documents
 1 
Search results for , issue "Volume 18 Issue 3 Year 2010" : 5 Documents clear
KOMUNITAS DIATOM PADA EKOSISTEM MANGROVE PANTAI UTARA JAWA TENGAH R. Soeprobowati, Tri Retnaningsih; W.A. Suedy, Sri
JURNAL SAINS DAN MATEMATIKA Volume 18 Issue 3 Year 2010
Publisher : JURNAL SAINS DAN MATEMATIKA

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Abstract

Diatom is a unique microalgae, undoubtly good bioindicator of water quality, andable to be usedf or paleoreconstructione nvironmentacl hangesI.t s relatedt o the silicious frustule,t hat remainpreserved in the sediment. Diatom have widespread distribution, including in the mangrove ecosystem.Mangrove€ cosystema lso unique, influenceb y freshwatera nd salinew ater, therefore,t he biodiversity in themangrovee cosystema re very high. However,t he sharpd egradationo f mangrovee cosystemin the NorthernCoast of Central might reduce the biodiversity, particularly diatom. This research is conducted in order tostudy the diatom community vertically in the Norther Coast of Central Java and their correlation with waterquallty. From 54 sediments amples, 147 diatoms speciesw are identified, 10.88% of Centrophycidaea nd89.12o/o of PennatophycidaeP. lanktonic and benthonic ( epifitic, epilitic and epipelic) diatoms werecomposed iatoms community in the mangrovee cosystemF. reshwaterd iatom have an important role in themangreovee cosystemi,n dicatedb y the dominanceo f freshwaterd iatOmsin all sites.permalink : http://ejournal.undip.ac.id/index.php/sm/article/view/2850
UPTAKE OF NICKEL(II) USING DIMETHYLGLIOXYME CHELATE ANION EXCHANGE RESIN Nugraheni, Nugraheni VD; Gunawan, Gunawan; Junaedi, Cholik Muhammad
JURNAL SAINS DAN MATEMATIKA Volume 18 Issue 3 Year 2010
Publisher : JURNAL SAINS DAN MATEMATIKA

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Abstract

ABSTRACT---Uptake  of   nickel(II)   ions  from  solution  are studied  using  strong  base  anion   resin   ( Lewatit  M500, counter  ions  of  Cl-)  and  dimethylglyoxime   (2,3-butanedione dioxime,  H2DMG) as chelating agent. This study was conducted to determine optimum condition of chelate resin preparation for uptake of nickel(II)  ions  from  solution. The research used batch and column techniques. Batch technique was used to determine the best contact time at  chelate  resin preparation, capacity  of chelate resin ( mg Ni2+/ g), effect of pH stripping  (pH 1- 5)  and  pH  of  nickel(II)   solution  (pH 4 - 10)   to   capacity   of  chelate resin  as  well  as  effect of  pH  backwash  (pH 1- 5)  to  percentage  of  nickel(II)  ions  recovery. Column  technique  was  used  for  uptake of  nickel(II) ions  from  waste   water of  industrial  of  metal  veneering. Column flow rate was kept constant at 2 mL/ minute. Nickel(II) ions which were not removed by chelate resin was quantitatively  analyzed with atomic absorption spectrophotometer at wavelength  of 232,00 nm. Result  of  the  research   revealed   the   best   contact   time  at chelate  resin preparation   was  120 - 240   minutes   for   variation  of  contact  time   from  0 to 240 minutes to each 25 gram strong base anion resin. Capacity of chelate resin was obtained about 0,209 to 0,214 mg Ni2+/ g chelate resin. Capacity of  chelate   resin  decreased  progressively  after  process of   stripping  that was  0,217 - 0 mg Ni2+/ g  from pH of 5 to 1. The best range pH of nickel(II) solution was obtained at pH of 6 to  7 with capacity of chelate resin from 0,239 to 0,241 mg Ni2+/ g and selected at pH 6. Percentage recovery of nickel(II) ions increased 21,966 to 75,314% from pH backwash of 5 to 1. With column technique, chelate resin capacity was obtained 0,208 mg Ni2+/ g and breakthrough point was reached when flow times reached in 60 to 80 minutes.Permalink : http://ejournal.undip.ac.id/index.php/sm/article/view/2854
INVERSI MODEL BASED UNTUK GAMBARAN LITOLOGI BAWAH PERMUKAAN FR, Tabah; Danusaputro, Hernowo
JURNAL SAINS DAN MATEMATIKA Volume 18 Issue 3 Year 2010
Publisher : JURNAL SAINS DAN MATEMATIKA

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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
STRUKTUR DAN KOMPOSISI VEGETASI HABITAT JULANG EMAS (Aceros undulatus) DI GUNUNG UNGARAN JAWA TENGAH Himmah, Izzun; Utami, Sri; Baskoro, Karyadi
JURNAL SAINS DAN MATEMATIKA Volume 18 Issue 3 Year 2010
Publisher : JURNAL SAINS DAN MATEMATIKA

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Abstract

Abstrak ---Julang emas  merupakan  salah  satu  jenis burung Bucerotidae  yang  seluruh  jenisnya  saat ini  terancam  punah  karena  jumlah populasinya  yang terus menurun. Salah  satu hal yang menyebabkan penurunan  tersebut  adalah  berkurangnya kawasan  habitat  yang  menyediakan  vegetasi  sebagai  sumber  pakan, tempat berlindung, bermain,  istirahat, mengasuh  dan membesarkan  anak-anaknya.  Gunung Ungaran menrpakan  salah  satu  habitat  buruag  Julang  emas  yamg  terdapat  di Jawa  Tengah.  Prevalensi  Julang  emas  di Gunung  Ungaran  hanya  terdapat  di Bukit Watuondo  dan  Bukit Gentong.  Tujuan  penelitian  ini adalah  untuk membandingkan  struktur  dan komposisi vegetasi antara Bukit  Watuondo dan Bukit  Gentong, serta mengetahui  ketersediaan  vegetasi  yang  berpotensi  sebagai  habitat  sarang  dan  sumber  pakan  di kedua  wilayah tersebut.  Bukit Watuondo  dan  Bukit Gentong  ditentukan  sebagai  stasiun  pengamatan.  Masing-masing  stasiun dibagi menjadi 5 titik  sampling.  Setiap  titik  sampling  dibuat satu  fransek  yang  terdiri atas  5 plot ulangan berukuran  10x10 m dan ditentukan  secara sistematik.  Analisis data menggunakan  Indeks Nilai  Penting,Indeks  Kemelimpahan  dan  Indeks  Keanekaragaman.  Hasil penelitian  menunjukkan  terdapat  90  jenis pohon yang  tergabung  dalam  37  famili. Bukit Watuondo  memiliki  indeks  keanekaragaman  jenis yang  lebih  rendah dibandingkan  Bukit Gentong.  Bukit Watuondo  lebih berpotensi  sebagai  habitat  sarang  dibandingkan  denganBukit Gentong.  Ketersediaan  Ficus  yang  lebih banyak  di Bukit  Gentong  merupakan  habitat  sumber pakan bagi Julang emas.  Melihat data vegetasi  yang diperoleh, perlu dilakukan penanaman  pohon Ficus agar populasi  Julang  emas  di Gunung  Ungaran  tidak mengalami  penurunan  dan  akhirnya  punah.Kata kunci: vegetasi,  habitat,  Julang  emas  (Aceros  undulatus),  Gunung  Ungaranpermalink : http://ejournal.undip.ac.id/index.php/sm/article/view/2961
SOLUSI PERIODIK DARI PERSAMAAN KORTEWEG de VRIES (KdV) DENGAN OPERATOR BILINIER HIROTA Rubiyanti, Sri; Sutimin, Sutimin
JURNAL SAINS DAN MATEMATIKA Volume 18 Issue 3 Year 2010
Publisher : JURNAL SAINS DAN MATEMATIKA

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Abstract

Abstract. Hirota bilinear  operator  (Hirota Method) is proposed  to directly construct periodic wave solutions from Korteweg de Vries (KdV)  equation.  This solution can be expressed  in terms of  Jacobi  Theta 4 (Θ4)  functions, with  dispersion  relation  yielded  from  degradation of  biliear  equation. Then,  sinusoidal wave,  Solitary,  and Cnoidal can  be  reduced  from this solution to asses  certain of nome  (q).Key words: Hirota Bilinear operator,  Korteweg  de Vries  (KdV) equation,  periodic profil  gelombang  khusus seperti gelombangCnoidal  dan  Solitary.Permalink : http://ejournal.undip.ac.id/index.php/sm/article/view/2962

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