Melvin L. Beck

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Polyagglutination is the term applied to red blood cells (RBCs) that are agglutinated by almost all samples of human sera from adults but not by autologous serum or sera of newborns. The polyagglutinable state may be transient or persistent. Transient polyagglutinability results from the exposure of normally cryptic antigens by bacterial enzymatic activity(More)
The amount of heterochromatin in the genome of ten members of thevirilis species group was determined as the length of C-band chromosome material relative to the total karyotype length. Thevirilis phylad (Drosophila virilis, D. novamexicana, D. americana americana, andD. americana texana) has significantly greater amounts of heterochromatin in the genome(More)
The diploid chromosome number of the cotton boll weevil, Anthonomus grandis Boheman, is 44. Both C‐ and N‐banding techniques of mitotic cells demonstrated constitutive heterochromatin in the p arm of the eight largest chromosomes, the p arm of the X chromosome, and the centromeric region of autosomal groups A–D. Neither the y nor the group E autosomes(More)
In this study we tested the seeds of uncultivated plants for lectin activity. Extracts prepared from the seeds of 167 forb species were tested against human red cell samples. Extracts of 54 species agglutinated unmodified or enzyme-modified red cells. In nine species, the hemagglutinating lectin activity could be neutralized by N-acetyl-D-galactosamine,(More)
1. Erythrocyte counts, hemoglobin concentrations and hematocrit values were determined for diploid and triploid Ctenopharyngodon idella X Hypophthalmichthys nobilis hybrids and the parental species. 2. Comparisons of diploid and triploid hybrids with the parental species revealed low erythrocyte counts for triploids, high mean corpuscular hemoglobin values(More)
The term ‘polyagglutinability’ refers to abnormal erythrocytes which clump when mixed with any normal adult serum. A well-recognized cause of polyagglutination is activation of the latent T-receptor which is present on all human erythrocytes. Many species of bacteria, as well as viruses of the influenza group, produce neuraminidases capable of activating(More)
Two hundred four examples of blood group antibodies, reactive only by the indirect antiglobulin test, were examined by the two-layer albumin capillary (TLAC) technique. Fifty-nine per cent of the examples tested were reactive by this technique. TLAC reactivity appeared to be related to antibody specificity, but a positive association between TLAC reactivity(More)