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Five modern technetium-99m generators The first technetium-99m generator, unshielded, 1958. A Tc-99m pertechnetate solution is being eluted from Mo-99 molybdate bound to a chromatographic substrate A technetium-99m generator , or colloquially a technetium cow or moly cow , is a device used to extract the metastable isotope 99m Tc of technetium ...
Diamonds sold through this process are known as conflict diamonds or blood diamonds. [131] In response to public concerns that their diamond purchases were contributing to war and human rights abuses in central and western Africa, the United Nations, the diamond industry and diamond-trading nations introduced the Kimberley Process in 2002. [142]
Diamond mining and diamond tools: Diamonds were first recognised and mined in central India, [224] [225] [226] where significant alluvial deposits of the stone could then be found along the rivers Penner, Krishna and Godavari. It is unclear when diamonds were first mined in India, although estimated to be at least 5,000 years ago. [227]
Ileum, caecum and colon of rabbit, showing Appendix vermiformis on fully functional caecum The human vermiform appendix on the vestigial caecum. The appendix was once believed to be a vestige of a redundant organ that in ancestral species had digestive functions, much as it still does in extant species in which intestinal flora hydrolyze cellulose and similar indigestible plant materials. [10]
Type II diamond have no measurable nitrogen impurities. Type II diamonds absorb in a different region of the infrared, and transmit in the ultraviolet below 225 nm (2.25 × 10 −7 m), unlike Type I diamonds. They also have differing fluorescence characteristics, but no discernible visible absorption spectrum.
An age verification system, also known as an age gate, is any technical system that externally verifies a person's age.These systems are used primarily to restrict access to content classified, either voluntarily or by local laws, as being inappropriate for users under a specific age, such as alcohol, tobacco, gambling, video games with objectionable content, pornography, or to remain in ...
Lucky Diamond Rich pictured at Montreal, Canada's PuSh International Performing Arts Festival in 2008.. Gregory Paul McLaren (born 1971), [1] who goes by the name of Lucky Diamond Rich, is a New Zealand-British performance artist, street performer and international performing arts festival performer, whose acts include sword swallowing and juggling on a unicycle.
A graphical representation of the typical human karyotype The human mitochondrial DNA. Human genetic variation is the genetic differences in and among populations. There may be multiple variants of any given gene in the human population , a situation called polymorphism. No two humans are genetically identical.