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Periodic Videos (also known as The Periodic Table of Videos) is a video project and YouTube channel on chemistry.It consists of a series of videos about chemical elements and the periodic table, with additional videos on other topics in chemistry and related fields.
Software that converts text to voice is readily available and can be easily used to read out Wikipedia pages on-the-fly. See screen reader. The web-based Pediaphon service uses speech synthesis to generate MP3 audio files and podcasts of Wikipedia articles in
Many gases have toxic properties, which are often assessed using the LC 50 (median lethal concentration) measure. In the United States, many of these gases have been assigned an NFPA 704 health rating of 4 (may be fatal) or 3 (may cause serious or permanent injury), and/or exposure limits (TLV, TWA/PEL, STEL, or REL) determined by the ACGIH professional association.
This page lists recordings of Wikipedia articles being read aloud, and the year each recording was made. Articles under each subject heading are listed alphabetically (by surname for people). For help playing Ogg audio, see Help:Media. To request an article to be spoken, see Category:Spoken Wikipedia requests.
A Boy and His Atom is a 2013 stop-motion animated short film released on YouTube by IBM Research.One minute in length, it was made by moving carbon monoxide molecules with a scanning tunneling microscope, a device that magnifies them 100 million times.
Cadmium is a naturally occurring toxic metal with common exposure in industrial workplaces, plant soils, and from smoking. Due to its low permissible exposure in humans, overexposure may occur even in situations where only trace quantities of cadmium are found.
Chemical safety includes all safety policies, procedures and practices designed to minimize the risk of exposure to potentially hazardous chemicals.This includes the risks of exposure to persons handling the chemicals, to the surrounding environment, and to the communities and ecosystems within that environment. [1]
40 C.F.R.: Appendix A to Part 355—The List of Extremely Hazardous Substances and Their Threshold Planning Quantities (PDF) (July 1, 2008 ed.), Government Printing Office, archived from the original (PDF) on 2012-02-25