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Raharjo, R
Jurnal Pengelolaan Laboratorium Pendidikan
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Penetapan Bahan Organik Tanah Tandus Secara Spektrofotometri & Titrimetri Raharjo, R
Jurnal Pengelolaan Laboratorium Pendidikan Vol. 1, No. 1, Januari 2019
Publisher : Jurnal Pengelolaan Laboratorium Pendidikan

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Abstract

The content of organic matter in barren land and padas has been determined spectrophotometrically and titrimetrically. Soil samples were taken from four locations, each of the two locations of barren land (I and II) and two locations (I 'and II'). The content of soil organic matter at depths of 15, 50 and 90 cm determined spectrophotometrically, is 24.48; 17.29 and 9.07% (Location I), 19.64; 15.92 and 6.24% (Location II). With the titrimetry method on solid soil, the yield obtained is 1.30; 0.94 and 0.76% (Location I '), 0.64; 0.46 and 0.31% (Location II'). It appears, that the deeper the content of organic matter the lower the soil. When compared with barren land, the content in padas is lower. Key Words :  Organic matter, Spectrophotometrically, Titrimetrically
Peran Laminar Air Flow Cabinet Dalam Uji Mikroorganisme Bagi Mahasiswa Tugas Akhir Di Laboratorium Biokimia Harjanto, Sri; Raharjo, R
Jurnal Pengelolaan Laboratorium Pendidikan Vol. 1, No. 1, Januari 2019
Publisher : Jurnal Pengelolaan Laboratorium Pendidikan

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Abstract

Work safety and safety in the laboratory environment is needed. Based on the method of classification of the number of appliances usage. In this case from the observation / survey that the number of users of Laminar air flow in biochemical laboratories for 1 year (2017) this shows a very significant number, especially in certain months such as October - November reached the number 27, 31 users, the overall number of users enough many. This means showing that the instrument is needed for its existence.Also from the type of activities undertaken by students of Final Project so far by using these instruments can be served well means the tool is able to help solve the problems of students who are completing the research. Keywords: Microorganism, Laminar Air Flow, Safety
Peran Laminar Air Flow Cabinet Dalam Uji Mikroorganisme Bagi Mahasiswa Tugas Akhir Di Laboratorium Biokimia Harjanto, Sri; Raharjo, R
Jurnal Pengelolaan Laboratorium Pendidikan Vol. 1, No. 1, Januari 2019
Publisher : Laboratorium Bio Teknologi, Fakultas Sains dan Matematika, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (69.704 KB) | DOI: 10.14710/jplp.1.1.15-18

Abstract

Work safety and security in the laboratory environment is very much needed, especially those related to microorganisms. In this case the purpose of the survey is to find out what percentage of the success rate of inoculation or the planting of microorganisms using the Laminar Air Flow instrument. As for the method used based on the classification survey of the number of tools used. And from the observation / survey that the number of users of laminar water flow in the Biochemistry laboratory for 1 year (2017) shows a very significant number especially in certain months such as October - November reached 27, 31 users, overall the number of users was quite large. This means that the instrument is needed for its existence. Also from the types of activities carried out by the Final Project students so far by using these instruments can be well served means that the tool is able to help solve problems of students who are completing their research.
Penetapan Bahan Organik Tanah Tandus Secara Spektrofotometri & Titrimetri Raharjo, R
Jurnal Pengelolaan Laboratorium Pendidikan Vol. 1, No. 1, Januari 2019
Publisher : Laboratorium Bio Teknologi, Fakultas Sains dan Matematika, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (64.246 KB) | DOI: 10.14710/jplp.1.1.33-36

Abstract

The content of organic matter in barren land and padas has been determined spectrophotometrically and titrimetrically. Soil samples were taken from four locations, each of the two locations of barren land (I and II) and two locations (I 'and II'). The content of soil organic matter at depths of 15, 50 and 90 cm determined spectrophotometrically, is 24.48; 17.29 and 9.07% (Location I), 19.64; 15.92 and 6.24% (Location II). With the titrimetry method on solid soil, the yield obtained is 1.30; 0.94 and 0.76% (Location I '), 0.64; 0.46 and 0.31% (Location II'). It appears, that the deeper the content of organic matter the lower the soil. When compared with barren land, the content in padas is lower.
Co-Authors Sri Harjanto