A historical view of the Hindu astronomy, from the earliest dawn of that science in India to the present time. In two parts. Part I. The ancient astronomy. Part II. The modern astronomy, with an explanation of the apparent cause of its introduction, and the various impositions that followed. To which are added, I. Hindu tables of equations. II. Remarks on the Chinese astronomy. III. Translations of certain hieroglyphics, called the Zodiacs of Dendera.

Mode of access: Internet.

Observations of comets : from 611 B.C. to A.D.1640 : extracted from the Chinese annals /

Reprint. Originally published: London : s.n., 1871.

Courtes observations sur quelques points de l'histoire de l'astronomie et des mathématiques chez les orientaux /

Half title: Astronomie orientale.

Jing shu suan xue tian wen kao : 2 juan /

Mode of access: Internet.

Observations mathématiques, astronomiques, geographiques, chronologiques et physiques : tirées des anciens livres chinois ou faites nouvellement aux Indes et a la Chine /

Errata leaf at end of v. 1 and v. 3.

Untersuchungen über die Ursprünglichkeit und Alterthümlichkeit der Sternkunde : unter den Chinesen und Indiern und über den Einfluss der Griechen auf den Gang ihrer Ausbildung /

Includes bibliographical footnotes.

The relationship between the RBE of alpha particles and the radiosensitivity of different mutations of Chinese hamster cells

The RBE of alpha -particles in different mutations of Chinese hamster cells was determined with the aim of identifying differences in the sensitivity to x-ray and alpha -particle-induced DNA damage. Two parental lines of Chinese hamster cells and four radiosensitive mutants were irradiated with different single doses of x-rays and alpha -particles and clonogenic cell survival was determined. Radiosensitivity to x-rays varied by a factor of 5 between the cell strains whereas sensitivity to alpha -particle irradiation was almost identical among all strains. The RBE is only determined by the sensitivity of the cells towards x-rays. Since cells with different defects of repair or cell cycle control have different radiosensitivities, we conclude that the effects of x-ray irradiation and the RBE are mostly determined by the activity of repair processes.