The tetranucleotide theory of the structure of yeast nucleic acid was first enunciated by the writer1 and was subsequently conclusively demonstrated by the experimental evidence furnished by Levene and Jacobs,2 ‘and by Levene and La Forge.3 The facts on which the theory was based were: first, the isolation of four nucleosides; second, the isolation of simple pyrimidine nucleotides. These were o...

Articular cartilage does not contain blood vessels, the nutrition of chrondrocytes being derived mainly by diffusion of synovial fluid (Stockwell and Barnett, 1964; Ekholm, 1951). It has been demonstrated that the permeability of articular cartilage diminishes with ageing (Stockwell and Barnett, 1964; Tsaltsas and Kyriazis, 1967). This change has been attributed not only to the physical changes...

Kemampuan pemahaman konsep berhitung siswa di salah satu sekolah dasar Kota Pangkalpinang masih tergolong rendah. Penelitian ini dilakukan dengan tujuan meningkatkan kemampuan melalui diterapkannya permainan caklingking. menggunakan pendekatan penelitian kuantitatif metode eksperimen desain eksperimental semu berjenis the nonequivalent control gorup . melibatkan kelas 1A yang dijadikan sampel k...

Levene and Jacobs have formulated the structure of yeast nucleic acid as a tetranucleotide. The facts that led up to their formulation were: 1. The formation of four nucleosides on neutral or ammonia hydrolysis. 2. The formation of simpler nucleotides on hydrolysis with dilute mineral acids. 3. The presence of a phosphorus to nitrogen ratio which agreed quite well for t.he tetranucleotide theor...

UNLABELLED Whole-brain activity is often chosen to quantitatively normalize peri-ictal and interictal SPECT scans before their subtraction. This use is not justified, because significant and extended modification of the cerebral blood flow can occur during a seizure. We validated and compared 2 automatic methods able to determine the optimal reference region, using simulation and clinical data....

This research objective was to determine the effect of using Educandy learning media on Japanese students’ outcomes in a state vocational high school Jakarta for academic year 2020/2021. study applied experimental quantitative method, with purposive sample technique 16 students. used one group Pre Test–Post Test design, and data collected then analysed descriptive inferential statistics. In pre...