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Photuris is a genus of fireflies (beetles of the family Lampyridae). These are the femme fatale lightning bugs of North America.This common name refers to a behavior of the adult females of these predatory beetles; they engage in aggressive mimicry, imitating the light signals of other firefly species' females to attract mates – but Photuris use it to attract, kill and eat the unsuspecting ...
The light organ of P. pyralis is composed of two layers: a layer of refractile cells on the dorsal side and a photic layer with light-producing cells on the ventral side. [28] The light organ (specifically the photogenic layer) is supplied with numerous tracheal branches, which are thought to provide the required oxygen for light production. [28]
Photuris female by flash photography (above); by her own light (below) Light production in fireflies is due to the chemical process of bioluminescence. This occurs in specialized light-emitting organs, usually on a female firefly's lower abdomen. The enzyme luciferase acts on luciferin, in the presence of magnesium ions, ATP, and oxygen to ...
Chunli Li MNZM (simplified Chinese: 李春丽; traditional Chinese: 李春麗; pinyin: Lǐ Chūnlì, born 28 February 1962) is a Chinese-born New Zealand female professional table tennis player. She won a gold, silver and two bronze medals at the 2002 Commonwealth Games to cap off her long career. [1]
Photuris pensylvanica, known by the common names Pennsylvania firefly, lightning bug, [3] dot-dash firefly [4] and (in its larval state) glowworm, [5] is a species of firefly from the United States and Canada.
Table tennis player Zeng Zhiying left China all alone for an adventure in Chile in 1989. As her native country boiled with street protests that led to the Tiananmen Square massacre that year, she ...
He has won four World Championship medals. He won the bronze medal in the mixed doubles at the 1999 World Table Tennis Championships, a gold medal in the mixed doubles at the 2001 World Table Tennis Championships with Yang Ying and two bronze medals at the 2003 World Table Tennis Championships in the men's doubles and mixed doubles with Ma Lin and Niu Jianfeng, respectively.
Table tennis is unique among racket sports in that it supports a wide variety of playing styles and methods of gripping the racket, at even the highest levels of play. This article describes some of the most common table tennis grips and playing styles seen in competitive play. The playing styles listed in this article are broad categories with ...