436 research outputs found

    Respons Pertumbuhan dan Produksi Kacang Tanah terhadap Aplikasi Pupuk Sp-36 dan Pupuk Cair Hayati [Growth And Production Response Of Peanut On Sp-36 And Biological Liquid Fertilizer Application]

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    Aplikasi pupuk fosfat dan pupuk cair hayati dapat meningkatkan pertumbuhan dan produksi tanaman kacang tanah. Tujuan penelitian ini adalah untuk mengetahui respons pertumbuhan dan produksi kacang tanah varietas Bison terhadap aplikasi berbagai dosis pupuk SP-36 dan pupuk cair hayati Feng Shou serta interaksinya. Penelitian menggunakan Rancangan Acak kelompok (RAK) yang disusun secara faktorial dua faktor dan setiap kombinasi perlakuan diulang tiga kali. Faktor pertama adalah dosis pupuk SP-36, yaitu 0, 50, 75 dan 100 kg/ha. Faktor kedua adalah dosis pupuk hayati cair, yaitu 0, 0,5, 1 dan 1,5 l/ha. Hasil penelitian menunjukkan bahwa respons tinggi tanaman terbesar diperoleh pada aplikasi pupuk SP-36 dosis 100 kg/ha. Respons jumlah polong, jumlah biji, berat basah polong, berat basah brangkasan dan berat 100 biji tertinggi diperoleh pada aplikasi pupuk SP-36 dosis 75 kg/ha. Respons petumbuhan dan produksi kacang tanah terhadap aplikasi pupuk cair hayati Feng Shou terbaik diperoleh pada dosis 1 l/ha

    PEMBUATAN APLIKASI HALO KIDS MENGGUNAKAN AUGMENTED REALITY TECHNOLOGY SEBAGAI MEDIA PEMBELAJARAN DAN PENGENALAN PROFESI BAGI ANAK USIA DINI BERBASIS ANDROID

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    Penelitian ini bertujuan sebagai media pembelajaran yang medah dan murah yang dapat digunakan untuk menambah edukasi bagi anak usia dini seperti pengetahuan mengenai pengenalan berbagai macam profesi. Media belajar berupa fisik pada saat ini dinilai cukup mahal, selain itu media belajar berupa fisik perlu pemahaman yang lebih untuk dapat memahami sesuatu yang dipelajari. Penelitian ini dikembangkan dengan metode SDLC (System Development Life Cycle). Penelitian ini termasuk jenis pengembangan teknologi augmented reality yang berisi tentang wawasan mengenai berbagai macam profesi, tanaman, alat musik, dan kebutuhanku. Objek yang diambil tentang karakter profesi, bentuk alat musik, bentuk tanaman, dan bentuk peralatan rumah tangga. Teknik pengumpulan data dilakukan dengan angket. Angket ini digunakan untuk menilai kelengkapan serta kelayakan aplikasi. Software engine yang kita gunakan adalah unity game engine. Hasil dari penelitian ini berupa aplikasi HALO KIDS berbentuk file .apk yang dijalankan pada ponsel pintar. Pengembangan aplikasi ini menggunakan software Unity 3D. Aplikasi HALO KIDS diharapkan mampu menciptakan gambaran visual berupa objek 3D terhadap macam-macam profesi sehingga dapat dijadikan sebagai media ajar maupun belajar yang interaktif

    Optimasi Transformasi Genetika Melalui Agrobacterium Pada Tanaman Padi

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    Keberhasilan transformasi genetika pada tanaman padi sangat dipengaruhi oleh karakternya yang bersifat recalsitrant, terutama padi jenis indica yang banyak ditanam oleh petani di Indonesia. Oleh karena itu, optimasi metode selalu diperlukan sebelum melakukan transformasi genetika pada tanaman padi. Transformasi gen GUS sering digunakan sebagai sarana optimasi metode transformasi sebelum melakukan overekspresi gen yang sesungguhnya. Penelitian ini bertujuan untuk memastikan bahwa komponen transformasi gen melalui Agrobacterium tumefaciens dapat bekerja secara efektif pada tanaman padi. Penelitian dilaksanakan di Laboratorium Biosain Politeknik Jember dari bulan Maret sampai dengan Desember 2013. Konstruk gen GUS diperoleh dari Laboratorium Biologi Molekuler Universitas Jember. Padi yang digunakan adalah varietas Inpari 20 dari BPTP Malang dan CV Dongjin dari Korea Selatan sebanyak 20 biji dari setiap verietas. Hasil penelitian menunjukkan bahwa transformasi gen GUS melalui Agrobacterium tumefaciens berhasil menginfeksi eksplan. Eksplan yang diinfeksi tumbuh pada media seleksi antibiotik higromisin sampai umur 65 hari setelah infeksi. Hasil uji GUS menunjukkan bahwa gen GUS tidak terekspresi pada tanaman Padi. Hal ini menunjukkan bahwa ada kemungkinan DNA promoter dan plasmit pCAMBIA tidak kompatibel pada tanaman padi. Agrobacterium tumefaciens dapat digunakan untuk transformasi genetika pada tanaman padi, tetapi perlu DNA promoter dan plasmit yang kompatibel

    Optimization of chloroxylenol degradation by Aspergillus niger using Plackett-Burman design and response surface methodology

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    Chloroxylenol is a very toxic phenolic derivative and it represents potential hazard towards human health and to the environment. Aspergillus niger, local isolate, is an efficient fungus to degrade 99.72% of 2 mg/L of chloroxylenol after 7 days of fermentation. It also has a high capacity to degrade 91.83% of higher chloroxylenol concentration of 20 mg/L after 6 days of incubation on mineral medium amended with 2 g/L of glucose. Statistical experimental designs were used to optimize the process of chloroxylenol degradation by the fungus. The most important factors influencing chloroxylenol degradation, as identified by a two-level Plackett-Burman design with 11 variables, were NaCl, (NH4)2SO4, and inoculums size. Response surface analysis was adopted to further investigate the mutual interactions between these variables and to identify their optimal values that would generate maximum chloroxylenol degradation. Under the optimized medium compositions and culture conditions, A. niger was able to degrade completely (100%) chloroxylenol (20 mg/L) after 134.6 h of fermentation. The predicted values of Plackett-Burman conditions and response surface methodology were further verified by validation experiments. The excellent correlation between predicted and experimental values confirmed the validity and practicability of this statistical optimum strategy. Optimal conditions obtained in this work laid to a solid foundation for further use of A. niger in treatment of high strength chloroxylenol polluted effluents. So, the optimized conditions were applied to bioremediate crude sewage containing 27.8 mg/L of chloroxylenol by A. niger. The fungus efficiently degraded chloroxylenol after 8 days of fermentation.Key words: Chloroxylenol degradation, Aspergillus niger, Plackett-Burman design, Response surface methodology

    Antecedent of Knowledge, Awareness and Willingness of SMEs Actors to Register for Halal Self Declare Certification

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    Consuming halal products has become a lifestyle and trend for both Muslim and non-Muslim communities throughout the world. Despite creating a large market potential and the government has strong desire to make Indonesia as a reference for world halal producers and encourage the facilitation of knowledge and awareness of halal products. This study aims to determine the effect of the knowledge of SMEs actors about halal certification on willingness to take halal certification and find out whether awareness of halal products has an influence on willingness to take halal certification. This study used a questionnaire in data collection, and the research informants were micro and small business actors in the food and beverage sector. The results of this study found that knowledge has no significant effect on the willingness of SMEs to participate in self-declared halal certification, while awareness has a positive and significant effect on the willingness of SMEs to participate in self-declare halal certification. The implications of this finding can be conveyed to the government in order to conduct intensive socialization regarding free halal certification which can involve micro and small actors who are successful in participating of halal certification

    Solvent free synthesis of hydrazine carbothioamide derivatives as a precursor in the preparation of new mononuclear Mn(II), Cu(II), and Zn(II) complexes: Spectroscopic characterizations

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    ABSTRACT. Over the last few years considerable attention has been devoted to the study of Schiff base complexes of metal(II) containing nitrogen, oxygen and sulfur donor ligands due to their diverse biological activities. Therefore, the Schiff base thiosemicarbazone derivatives of 2-(2-hydroxy-3-methoxybenzylidene) hydrazine carbothioamide (HL1) and 2-(4-bromo-2-hydroxy-3-methoxybenzylidene) hydrazine carbothioamide (HL2) were synthesized with solvent free technique using silica gel as material support for the reaction. The structures of the precursor’s organic products confirmed with their 1H, 13C NMR, IR and microanalysis data. Six new manganese(II), copper(II), and zinc(II) complexes of HL1 and HL2 2-(2-hydroxy-3-methoxybenzylidene) hydrazinecarbothioamide derivatives with the general formulation [ML1Cl] and [ML2Cl], where M = Mn2+, Cu2+, and Zn2+ were prepared and well discussed by using elemental analyses, magnetic moments, molar conductance, infrared and electronic spectral techniques. The assignments data of spectroscopic analysis confirm that the synthesized thiosemicarbazone Schiff bases of acts as a tridentate ligand as sulfur-oxygen-nitrogen donating atoms. The values of magnetic moments agreed with the data of electronic spectra which both suggested a four-coordination geometry of the synthesized complexes.                     KEY WORDS: Schiff base, Thiosemicarbazone, Manganese(II) complex, Copper(II) complex, Zinc(II) complex   Bull. Chem. Soc. Ethiop. 2021, 35(2), 413-424. DOI: https://dx.doi.org/10.4314/bcse.v35i2.1
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