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All Journal Indonesian Journal of Biotechnology Journal of Fisheries & Marine
Khairul Syahputra, Khairul
Unknown Affiliation
Biochemistry, Genetics & Molecular Biology Immunology & microbiology Materials Science & Nanotechnology

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Biodegradation of Used Engine Oil by Acinetobacter junii TBC 1.2 Basuki, Witono; Syahputra, Khairul; Suryani, Ayu Tri; Pradipta, Ilham
Indonesian Journal of Biotechnology Vol 16, No 2 (2011)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (43.035 KB)

Abstract

AbstractThe isolates have capability to degrade used engine oil was obtained from soil in the beach contaminatedwith used engine oil. One of the selected isolates TBC 1.2 was identified by its 16s rDNA as Acinetobacterjunii. The microorganism can use hydrocarbons in used engine oil as the sole carbon source and energy, alsoit significantly degraded almost all hydrocarbon compounds in used engine oil. With its ability Acinetobacterjunii TBC 1.2 has a potency to be utilized for bioremediation of soil polluted with used engine oil.Keywords : biodegradation, used engine oil, Acenitobacter junii TBC 1.2
The Gonadal Maturity and Gene Expressions of Female Giant Freshwater Prawn (Macrobrachium rosenbergii) after Dietary Administration of Medroxyprogesterone Acetate Anggraeni, Fajar; Malini, Desak Made; Damanhuri, Joni Haryadi; Syahputra, Khairul; Sopian, Asep; Khasani, Ikhsan; Imron, Imron; Krettiawan, Hary
Jurnal Ilmiah Perikanan dan Kelautan Vol. 16 No. 1 (2024): JURNAL ILMIAH PERIKANAN DAN KELAUTAN
Publisher : Faculty of Fisheries and Marine Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jipk.v16i1.43499

Abstract

Abstract One of the problems in giant prawn cultivation is female giant prawns laying eggs during rearing. They will incubate their eggs for three weeks so that the energy from the expected feed for growth is used for egg development and other reproductive activities. Giving MPA hormone to giant prawns either by injection or oral could inhibit gonadal maturation and increase growth rate. The maturation process of the prawn ovary consists of the activation of some complex cellular mechanisms involving genes that regulate the stages of oocyte development. This study aimed to evaluate the response of gonadal maturity and the expression of the MrvWD-Kazal gene in giant prawns fed with a diet containing MPA hormone. The design used in this study was a completely randomized design with four treatments and five replications. The treatments were feeding a diet added with MPA with a concentration of 0 mg.kg-1 feed as control (K), 50 mg.kg-1 feed (P1), 100 mg.kg-1 feed (P2), and 150 mg.kg-1 feed (P3). MPA hormone at a concentration of 50-150 mg/kg feed could inhibit the gonadal maturation of female prawns. In 100 mg/kg of feed concentration showed the lowest gene expression level, indicating an inhibition of gonadal maturation molecularly. The administration of MPA hormone through the feed is a recommended method of aquaculture because it is more applicable and effective than by injection, even though it has a non-uniform impact on each individual. Highlight Research Administration of MPA hormone through the feed to female giant freshwater prawns can inhibit the level of gonad maturity. Expression of von Willebrand factor D (vWD) – Kazal gene were analyzed in different levels of prawn maturity Gonadosomatic index and gonadal histology confirmed that different levels of administration of MPA hormone through the feed could affect the gonad development. The administration of MPA hormone through the feed is a recommended method for aquaculture because it is more applicable and effective to inhibit early maturation of prawns.
Co-Authors Anggraeni, Fajar Asep Sopian Ayu Tri Suryani, Ayu Tri Damanhuri, Joni Haryadi Desak Made Malini Hary Krettiawan Ikhsan Khasani Ilham Pradipta, Ilham Imron Imron, Imron Witono Basuki, Witono