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The mezzotint printmaking method was invented by the German soldier and amateur artist Ludwig von Siegen (1609 – c. 1680). His earliest mezzotint print dates to 1642 and is a portrait of Countess Amalie Elisabeth of Hanau-Münzenberg, regent for her son, and von Siegen's employer. This was made by working from light to dark.
Parietal epithelial cell (PEC) Podocyte; Angioblast → Endothelial cell; Mesangial cell. Intraglomerular; Extraglomerular; Juxtaglomerular cell; Macula densa cell; Stromal cell → Interstitial cell → Telocytes; Kidney proximal tubule brush border cell; Kidney distal tubule cell; Connecting tubule cells; α-intercalated cell; β-intercalated ...
Aquatint is an intaglio printmaking technique, a variant of etching that produces areas of tone rather than lines. For this reason it has mostly been used in conjunction with etching, to give both lines and shaded tone. [ 1 ]
Portrait of Amelie Elisabeth von Hessen, the first known mezzotint, by Ludwig von Siegen, 1642. Ludwig von Siegen (c. March 1609 Cologne – c. 1680 Wolfenbüttel, Germany) was a German soldier and amateur engraver, who invented the printmaking technique of mezzotint, a printing-process reliant on mechanical pressure used to print more complex engravings than previously possible.
Blood cell lineage. The megakaryocyte develops through the following lineage: CFU-Meg (hematopoietic stem cell/hemocytoblast) → megakaryoblast → promegakaryocyte → megakaryocyte. Megakaryocytes are derived from hematopoietic stem cell precursor cells in the bone marrow. They are produced primarily by the liver, kidney, spleen, and bone ...
Endothelial stem cells (ESCs) are one of three types of stem cells found in bone marrow. They are multipotent, which describes the ability to give rise to many cell types, whereas a pluripotent stem cell can give rise to all types. ESCs have the characteristic properties of a stem cell: self-renewal and differentiation.
Saint Agnes, mezzotint by John Smith after Godfrey Kneller. [1] 1835 aquatint showing the first production of I puritani. Coquetry, lithograph by Henri Baron (1816-1885). Monochrome printmaking is a generic term for any printmaking technique that produces only shades of a single color. While the term may include ordinary printing with only two ...
Histiocytes are derived from the bone marrow by multiplication from a stem cell. The derived cells migrate from the bone marrow to the blood as monocytes . They circulate through the body and enter various organs, where they undergo differentiation into histiocytes, which are part of the mononuclear phagocytic system (MPS).