English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

A method is described for the preparation of transforming DNA from 1 ml. samples of pneumococcal cultures of low density (e.g. about 107 bacteria). It seemed likely that the precipitation of very small amounts of transforming DNA from lysates of dilute pneumococcus cultures might result in loss of DNA unless a suitable co-precipitant was added. With high dilutions of transforming DNA, it was confirmed that such a loss was obtained. This loss was largely prevented by the addition of sodium hyaluronate in the presence of citrate. Dextran was not as efficient as hyaluronate as a co-precipitant.

A Co-precipitation Method for the Preparation of Transforming DNA from Small Samples of Low Density Bacterial Cultures