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Aims: The purpose of this study was to evaluate the effects of ambient or altered environmental conditions on the inactivation of SARS‐CoV‐2 applied to materials common in libraries, archives and museums. Methods and Results: Porous and non‐porous materials (e.g. paper, plastic protective book cover) were inoculated with approximately 1 × 105 TCID50 SARS CoV‐2 (USA‐WA1/2020), dried, placed within test chamber in either a stacked or unstacked configuration, and exposed to environmental conditions ranging from 4 to 29°C at 40 ± 10% relative humidity. The amount of infectious SARS‐CoV‐2 was then assessed at various timepoints from 0 to 10 days. Ambient conditions resulted in varying inactivation rates per material type. Virus inactivation rate decreased when materials were stacked or at colder temperatures. Virus inactivation rate increased when materials were unstacked or at warmer temperatures. Conclusions: SARS‐CoV‐2 at ambient conditions resulted in the inactivation of virus below limit of quantitation (LOQ) for all materials by Day 8. Warmer temperatures, for a subset of materials, increased SARS‐CoV‐2 inactivation, and all were

The article focuses on the limitation in the development of research in social science, that is set by the quality of the paper that has been used for printing over the last quarter of the nineteenth century. Between the 60's and the 80's of the 19th century wood pulp paper replaced rag paper in the publishing trade. The use of wood pulp and of cheaper manufacturing processes effect a revolution in publishing comparable to the revolution brought about when paper replaced parchment in the 14th and 15th centuries. Wood pulp paper made possible an increased publishing of newspapers and magazines in the same decades in which the spread of popular education was creating new multitudes of readers for the increased mass of printed matter. The paper situation threatens to limit in an arbitrary way the development of research in the social sciences. Librarians already hesitate to permit teachers to set loose their research students to devour newspaper files. The purchase policies of the libraries are trimmed to avoid the acquisition of many types of documents which should be saved, but which the librarians will not gather because the paper is too poor.