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Lightweight expanded clay aggregate (LECA) or expanded clay (exclay) is a lightweight aggregate made by heating clay to around 1,200 °C (2,190 °F) in a rotary kiln. The heating process causes gases trapped in the clay to expand, forming thousands of small bubbles and giving the material a porous structure.
Leca of Cătun (before 1599–1616), Wallachian political figure; Béatrice Leca (born 1970), French writer; Daniel Leca (born 1985), French politician; Francine Leca (1938-2024), French surgeon and professor; Grégory Leca (born 1980), French footballer; Haralamb Lecca (or Leca), (1873–1920), Romanian poet and playwright
Leca was a commander of Wallachian troops in Michael's battles at Mirăslău (1600) and Guruslău (1601), returning to Wallachia after Michael's assassination. Leca was a Postelnic and diplomat during Prince Radu Șerban's eight-year reign, following the court into its exile to Moldavia (1610–1612).
Leica Camera AG (/ ˈ l aɪ k ə /) is a German company that manufactures cameras, optical lenses, photographic lenses, binoculars, and rifle scopes.The company was founded by Ernst Leitz in 1869 (Ernst Leitz Wetzlar), in Wetzlar, Germany.
After the LECA, some 2 billion years ago, the eukaryotes diversified into a crown group, which gave rise to animals, plants, fungi, and protists. Eukaryogenesis , the process which created the eukaryotic cell and lineage, is a milestone in the evolution of life, since eukaryotes include all complex cells and almost all multicellular organisms.
M9 – 2009 – The first full frame digital camera in the series, introduced on September 9, 2009. [1]M9-P – 2011 – The full frame digital camera with a classic look, introduced in June/July 2011.
Francine Leca (20 May 1938 – 15 June 2024) was a French cardiac surgeon and professor of medicine specialising in heart surgery, a pioneer of the discipline in pediatrics. Biography [ edit ]
Summary of Leica M lenses Speed Name 21mm 24mm 28mm 35mm 50mm 75mm 90mm 135mm; f /5.6: Summaron: f /4.0: Super-Angulon Macro Elmar: Elmar Tele-Elmar Tri-Elmar ASPH 16-18-21mm: 28-35-50mm: f /3.8