Continuation Formation
Mostrando 13-23 de 23 artigos, teses e dissertações.
-
13. Segmental aplasia of the caudal vena cava in a dog
Ultrasonography, angiography, magnetic resonance imaging, and exploratory laparotomy of a 2-year-old wheaten terrier with lethargy, exercise intolerance, and ascites revealed segmental aplasia of the caudal vena cava with azygos continuation, complicated by thrombus formation. Surgeries were performed on the blind-ended vessel to remove thrombi, enhancing sh
-
14. Characteristics of Hormogonia Formation by Symbiotic Nostoc spp. in Response to the Presence of Anthoceros punctatus or Its Extracellular Products
Nostocacean cyanobacteria typically produce gliding filaments termed hormogonia at a low frequency as part of their life cycle. We report here that all Nostoc spp. competent in establishing a symbiotic association with the hornwort Anthoceros punctatus formed hormogonial filaments at a high frequency in the presence of A. punctatus. The hormogonia-inducing a
-
15. Electron Microscopic Observation of the Sporangial Structure of a Strain of Actinoplanes
Lechevalier, Hubert (Rutgers, The State University, New Brunswick, N.J.), and Pauline E. Holbert. Electron microscopic observation of the sporangial structure of a strain of Actinoplanes. J. Bacteriol. 89:217–222. 1965.—Actinoplanes sp. P 128 has polarly flagellated sporangiospores. The numerous flagella, formed by the helical winding of subfibrils, were
-
16. Identification and Characterization of Aspergillus Nidulans Mutants Defective in Cytokinesis
Filamentous fungi undergo cytokinesis by forming crosswalls termed septa. Here, we describe the genetic and physiological controls governing septation in Aspergillus nidulans. Germinating conidia do not form septa until the completion of their third nuclear division. The first septum is invariantly positioned at the basal end of the germ tube. Block-and-rele
-
17. Regulation of protein synthesis in rabbit reticulocyte lysates: Additional initiation factor required for formation of ternary complex (eIF-2·GTP·Met-tRNAf) and demonstration of inhibitory effect of heme-regulated protein kinase
Heme deficiency in rabbit reticulocytes and their lysates leads to the activation of a heme-regulated translational inhibitor (HRI) which causes the cessation of polypeptide initiation. HRI is a protein kinase that specifically phosphorylates the 38,000-dalton subunit of eukaryotic initiation factor 2 (eIF-2). eIF-2 binds Met-tRNAf and GTP in ternary complex
-
18. Identification of two nuclear subclasses of the adenovirus type 5-encoded DNA-binding protein.
The synthesis, accumulation, and subcellular distribution of the adenovirus serotype 5 DNA-binding protein (DBP) has been examined during the infectious cycle in HeLa cells. With the onset of viral DNA replication and entry into the late phase, two nuclear subclasses of DBP are distinguishable by immunofluorescence microscopy and can be separately isolated b
-
19. Cellular epigenetics: control of the size, shape, and spatial distribution of transformed foci by interactions between the transformed and nontransformed cells.
NIH 3T3 cells that are passaged frequently at low density in high (10%) calf serum lose their original capacity to produce transformed foci on a monolayer of nontransformed cells. They can then be used to form a monolayered background for the assay of the number of focus-forming cells from a transformed population. Continuation of the low-density passages fo
-
20. Stability of β-Galactosidase Messenger Ribonucleic Acid in Escherichia coli
Ben-Hamida, Fakher (Washington University School of Medicine, St. Louis, Mo.), and David Schlessinger. Stability of β-galactosidase messenger ribonucleic acid in Escherichia coli. J. Bacteriol. 90:1611–1616. 1965.—Synthesis of β-galactosidase stops within several minutes when preinduced, permeaseless cultures are diluted into medium containing 40 μg/m
-
21. A second nonstructural protein functions in the regulation of alphavirus negative-strand RNA synthesis.
Previous studies (D.L. Sawicki, D. B. Barkhimer, S. G. Sawicki, C. M. Rice, and S. Schlesinger, Virology 174:43-52, 1990) identified a temperature-sensitive (ts) defect in Sindbis virus nonstructural protein 4 (nsP4) that reactivated negative-strand synthesis after its normal cessation at the end of the early phase of replication. We now report identificatio
-
22. The Mammalian Ovary from Genesis to Revelation
Two major functions of the mammalian ovary are the production of germ cells (oocytes), which allow continuation of the species, and the generation of bioactive molecules, primarily steroids (mainly estrogens and progestins) and peptide growth factors, which are critical for ovarian function, regulation of the hypothalamic-pituitary-ovarian axis, and developm
The Endocrine Society.
-
23. Cellular streptolysin S-related hemolysins of group A Streptococcus C203S.
Group A streptococci strain C203S, grown in heart infusion broth with 0.3% maltose, produce two cellular hemolysins related to extracellular streptolysin S (SLS). Enzymatic lysis of the streptococci by group C streptococcal phage-associated lysin results in release of low titer, labile hemolysin, which can be stabilized by ribonucleic acid (RNA)-core (RNA pr