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from article Macrocyclic compound
Tetramers. (a) Resorcinarene having the rctt conformation. (b) Pyrogallolarene having the rccc conformation.
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from article Macrocyclic compound
The metal cation is the guest and the organic structure is the host in (a) 18-crown-6 complex of potassium cation (K+) and (b) sodium (Na+) complexed by a calix[4]arene.
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from article Macrocyclic compound
Complexing species. (a) Dibinaphtho-22-crown-6. (b) R,R-dibinaphtho-22-crown-6 complex of phenethylammonium chloride.
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from article Macrocyclic compound
Affinities for anions and cations shown for (a) pyrrole and (b) furan-derived cyclic tetramers.
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from article Macrocyclic compound
Amphiphiles. (a) Crown ether-steroid amphiphile. (b) Crown ether bolaamphiphile.
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from article Cell cycle
Phases of the eukaryotic cell cycle. Interphase is subdivided into three phases: gap phase 1 (G1), synthesis (S), and gap phase 2 (G2). M phase, which follows interphase, consists of mitosis (nuclear division) and cytokinesis (cell division). G0…
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from article Cell cycle
During cytokinesis (cell division), the cell pinches into two parts between the separated daughter nuclei. At the end of this process, the two daughter cells often remain tethered by a thin "midbody" of microtubules. Once this midbody breaks, the…
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from article Cell cycle
Behavior of various Cdk/cyclin complexes and their cellular events.
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from article Pituitary gland
Phylogenetic tree of generalized vertebrate pituitary glands (midsagittal section). P = prolactin; S = somatotropin; G = gonadotropin; T = thyrotropin; A = adrenocorticotropin; M = melanocyte-stimulating hormone; ? = unidentified function. (After M.…
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from article Pituitary gland
Relationship of the pituitary gland to the brain and hypothalamus. (After D. S. Luciano, A. J. Vander, and J. H. Sherman, Human Anatomy and Physiology: Structure and Function, 2d ed., McGraw-Hill, 1983)
