Preprints

Explore 66,105 preprints on the Authorea Preprint Repository

A preprint on Authorea can be a complete scientific manuscript submitted to a journal, an essay, a whitepaper, or a blog post. Preprints on Authorea can contain datasets, code, figures, interactive visualizations and computational notebooks.
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The Bürgi–Dunitz angle revisited: a mystery?

Henry Rzepa
A document by Henry Rzepa. Click on the document to view its contents.
Studies on the anticataract activity of echitamine, an alkaloid from the stem bark of...

Lokesh Shetty Jagannatha

and 1 more

The phytoconstituent echitamine isolated from stem bark of Alstonia scholaris was subjected for in vitro cataract prevention study on glucose induced cataract model. Goat lenses were incubated with test drugs in different concentrations at room temperature for 72 h. Biochemical parameters studied in the lens were electrolytes Na+, K+  and Na+-K+-ATPase activity. Cataractous lens treated with drug shown lower Na+, higher K+ and higher Na+-K+-ATPase activity.  Lens treated with echitamine prevented formation and progress of cataract induced by glucose. Keywords; Cataract, Echitamine, Alstonia Scholaris
A Response to the NIH RFI “Optimizing Funding Policies and Other Strategies”

Gary S. McDowell
This document contains my comments to the National Institutes of Health Request for Information on “Optimizing Funding Policies and Other Strategies to Improve the Impact and Sustainability of Biomedical Research”, as submitted on May 11th 2015.
Tetrahedral or square planar? A ten minute exploration.

Henry Rzepa
A document by Henry Rzepa. Click on the document to view its contents.
The conformation of 1,2-difluoroethane

Henry Rzepa
A document by Henry Rzepa. Click on the document to view its contents.
The status of blogging as scientific communication.

Henry Rzepa
A document by Henry Rzepa. Click on the document to view its contents.
Allotropic halogens.

Henry Rzepa
A document by Henry Rzepa. Click on the document to view its contents.
Full-colour 3D printing of molecular models and orbitals (wavefunctions).

Henry Rzepa
A document by Henry Rzepa. Click on the document to view its contents.
The conformational preference of s-cis amides. Ramachandran plots.

Henry Rzepa
A document by Henry Rzepa. Click on the document to view its contents.
The butterfly effect in chemistry: Bimodal M~S bonds?

Henry Rzepa
A document by Henry Rzepa. Click on the document to view its contents.
Conformational analysis of biphenyls: an upside-down view

Henry Rzepa
A document by Henry Rzepa. Click on the document to view its contents.
σ-π-Conjugation: seeking evidence by a survey of crystal structures.

Henry Rzepa
A document by Henry Rzepa. Click on the document to view its contents.
Spotting the unexpected. Anomeric effects involving alkenes?

Henry Rzepa
A document by Henry Rzepa. Click on the document to view its contents.
The conformational preference of s-cis amides.

Henry Rzepa
A document by Henry Rzepa. Click on the document to view its contents.
Trigonal bipyramidal or square pyramidal: Another ten minute exploration.

Henry Rzepa
A document by Henry Rzepa. Click on the document to view its contents.
More simple experiments with crystal data. The pyramidalisation of nitrogen.

Henry Rzepa
A document by Henry Rzepa. Click on the document to view its contents.
A better model for the mechanism of Lithal (LAH) reduction of cinnamaldehyde?

Henry Rzepa
A document by Henry Rzepa. Click on the document to view its contents.
Open: evolution and revolution in science

Benjamin Laken
A document by Benjamin Laken. Click on the document to view its contents.
Energy Density Driven Galactic Formation and Evolution

Jeffrey M. La Fortune
A document by Jeffrey M. La Fortune. Click on the document to view its contents.
ORCID identifiers galore!

Henry Rzepa
A document by Henry Rzepa. Click on the document to view its contents.
A new way of exploring the directing influence of (electron donating) substituents on...

Henry Rzepa
A document by Henry Rzepa. Click on the document to view its contents.
Big Data, Weathermen and Economists: Never fall in love with a model

Miia Parnaudeau
A document by Miia Parnaudeau. Click on the document to view its contents.
A study justifying waste of tax-funds?

Björn Brembs
A document by Björn Brembs. Click on the document to view its contents.
Cloning forever

Jean Peccoud
A document by Jean Peccoud. Click on the document to view its contents.