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In an electron microsope study, the morphology of mature Paneth cells from the small intestine of adult rats is compared with that of differentiating Paneth cells from young rats 2 to 4 weeks old. All mature cells exhibit a marked polarity similar to that of other exocrine gland cells and contain a well developed endoplasmic reticulum, an elaborate Golgi(More)
A highly supported maximum-likelihood species phylogeny for the genus Bradyrhizobium was inferred from a supermatrix obtained from the concatenation of partial atpD, recA, glnII, and rpoB sequences corresponding to 33 reference strains and 76 bradyrhizobia isolated from the nodules of Glycine max (soybean) trap plants inoculated with soil samples from(More)
Knowledge of the number and kinds of differentiation steps that characterize cells of the osteoblast lineage is inadequate. To further analyze osteoblast differentiation, we generated a series of monoclonal antibodies (MAb) to osteogenic cells. Spleen cells from mice immunized with whole-cell populations enriched for expression of osteoblast-associated(More)
The highly polarized secretory ameloblasts in the incisors of rats fixed by perfusion with glutaraldehyde two or three hours after intravenous administration of vinblastine sulfate at a dosage of 5 mg per 100 g body weight were studied in the light microscope and the electron microscope. The following effects were observed: 1. All cytoplasmic microtubules(More)
The method of Deutsch and Weeks was modified to provide a reliable and reasonably quick method for assaying the L-ascorbic acid content of culture medium. The modified method was used to determine the decay of L-ascorbic acid under various conditions of culture and the concentration of the vitamin in commercially prepared media. The half-life of L-ascorbic(More)
  • H Moe
  • 1977
The acute effect of vinblastine sulphate at a dosage of 0.2 mg per 100 g body weight on ameloblasts in the progress of differentiation in rat incisors, and the ability of these cells to develop into secretory ameloblasts after exposure to the drug, were studied under the light microscope. In the early stages of differentiation (exclusively dividing cells)(More)
During recent years cytoplasmic corpuscles commonly known as dense bodies, lysosomes, multivesicular bodies, cytosomes, phagosomes, and microbodies have attracted much attention (see reviews by de Duve (3) and Novikoff (5)). Probably the different terms cover the same concept in several cases, but it is not clear what the exact relationship between these(More)