In art history, the French term objet d’art describes an ornamental work of art, and the term objets d’art describes a range of works of art, usually small and three-dimensional, made of high-quality materials, and a finely-rendered finish that emphasises the aesthetics of the artefact. Artists create and produce objets d’art in the fields of the decorative arts and metalwork, porcelain and vitreous enamel; figurines, plaquettes, and engraved gems; ivory carvings and semi-precious hardstone carvings; tapestries, antiques, and antiquities; and books with fine bookbinding. The National Maritime Museum, Greenwich, London, describe their accumulated artworks as a: "collection of objets d’art [which] comprises over 800 objects. These are mostly small, decorative art items that fall outside the scope of the Museum’s ceramic, plate, textiles and glass collections." The artwork collection also includes metal curtain ties, a lacquered papier-maché tray, tobacco boxes, cigarette cases, découpage (cut-paper items), portrait miniatures, a gilt-brass clock finial, plaques, statuettes, plaquettes, a horse brass, a metal pipe tamper, a small glass...

An apsis (from Ancient Greek ἁψίς (hapsís) 'arch, vault'; PL apsides AP-sih-deez) is the farthest or nearest point in the orbit of a planetary body about its primary body. The line of apsides is the line connecting the two extreme values. For example, for orbits about the Sun the apsides are called aphelion (farthest) and perihelion (nearest). The Moon's two apsides are the farthest point, apogee, and the nearest point, perigee, of its orbit around the host Earth. The Earth's two apsides are the farthest point, aphelion, and the nearest point, perihelion, of its orbit around the host Sun. The terms aphelion and perihelion apply in the same way to the orbits of Jupiter and the other planets, the comets, and the asteroids of the Solar System. ...

The Klenow fragment is a large protein fragment produced when DNA polymerase I from E. coli is enzymatically cleaved by the protease subtilisin. First reported in 1970, it retains the 5' → 3' polymerase activity and the 3’ → 5’ exonuclease activity for removal of precoding nucleotides and proofreading, but loses its 5' → 3' exonuclease activity. The other smaller fragment formed when DNA polymerase I from E. coli is cleaved by subtilisin retains the 5' → 3' exonuclease activity but does not have the other two activities exhibited by the Klenow fragment (i.e. 5' → 3' polymerase activity, and 3' → 5' exonuclease activity). Research Because the 5' → 3' exonuclease activity of DNA polymerase I from E. coli makes it unsuitable for many applications, the Klenow fragment, which lacks this activity, can be very useful in research. The Klenow fragment is extremely useful for research-based tasks such as: Synthesis of double-stranded DNA from single-stranded templates Filling in receded 3' ends of DNA fragments to make 5' overhang blunt Digesting away protruding 3' overhangs...