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Journal of Mathematical and Fundamental Sciences
ISSN : 23375760     EISSN : 23385510     DOI : https://doi.org/10.5614/j.math.fund.sci.
Core Subject : Science, Education,
Journal of Mathematical and Fundamental Sciences welcomes full research articles in the area of Mathematics and Natural Sciences from the following subject areas: Astronomy, Chemistry, Earth Sciences (Geodesy, Geology, Geophysics, Oceanography, Meteorology), Life Sciences (Agriculture, Biochemistry, Biology, Health, Medical, Pharmacy), Mathematics, Physics, and Statistics.
Articles 2 Documents
Search results for , issue "Vol. 4 No. 2 (1968)" : 2 Documents clear
Orientasi Kristal Tunggal Paduan Aluminium 6061 Harsono Wirjosumarto
Journal of Mathematical and Fundamental Sciences Vol. 4 No. 2 (1968)
Publisher : Institute for Research and Community Services (LPPM) ITB

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Abstract

Ichtisar. Kawat-kawat kristal tunggal dari paduan Aluminium 6061 jang dihasilkan dengan tjara "strain-anneal", mempunjai orientasi kristal jang hampir sama dengan orientasi pengerdjaan dingin dari logam tersebut pada waktu pembuatan kawat.Abstract. Single crystal wires of 6061 Aluminium alloy, which are produced by "strain-anneal" method, nearly have the same orientation as the cold-work orientation of the wire. 
Effects of Chemical upon Electron Spin Resonance (ESR) Signals in Lettuce Seeds Eddy Noerhadi
Journal of Mathematical and Fundamental Sciences Vol. 4 No. 2 (1968)
Publisher : Institute for Research and Community Services (LPPM) ITB

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Abstract

ESR spectrometric study of chemically treated lettuce seeds has been carried out. Solutions of HgCl2, Na2S, KOH, KCN, KBr, KF, KIO3, KIO4, KCl, KI, and K2S, as well as water and petroleum ether have been used. Germination power and respiratory activity of the same seeds have also been investigated. Boiled seeds and gamma irradiated seeds have also been studied. KI was found to be the most effective agent. Independence upon cation and pH was found. The effect of KI and KCN was found to be reversible. No correlation between respiratory activity and the number of free radicals seems to exist. Seed coat is affected first and later on the embryo is also induced by the penetrating solution. 

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