Steffens and Robeson, 1987). The compound inhibited the onion seedling elongation by 4, 32, 40, 68, and 94% The seeds of some dicotyledons fail to germinate and grow well at concentrations of 1029, 1028, 1027, 1026, and 1025 M, when contaminated by Aspergillus japonicus Saito. One strain of A. japonicus isolated from the seeds of contaminated rape (Brassica respectively. Penicillium oxalicum, w...

This report describes the influence of neurite fasciculation on two aspects of nerve growth from chick spinal ganglia in vitro : the inhibition of outgrowth by high concentrations of nerve growth factor (NGF) and the preferential growth of neurites toward a capillary tube containing NGF. These studies involved a comparison of cultures of single cells, cell aggregates, and intact ganglia and the...

This report describes the influence of neurite fasciculation on two aspects of nerve growth from chick spinal ganglia in vitro : the inhibition of outgrowth by high concentrations of nerve growth factor (NGF) and the preferential growth of neurites toward a capillary tube containing NGF. These studies involved a comparison of cultures of single cells, cell aggregates, and intact ganglia and the...

The human immunodeficiency virus-1 (HIV-1) protein Tat binds to cell surface antigens and can regulate cellular responses. Tat has similar immunosuppressive effects as transforming growth factor-/3 (TGFfl) and both inhibit lymphocyte proliferation. TGFfl is expressed by primary human articular chondrocytes and is their most potent growth factor. The present study analyzed the interactions of TG...

When Euglena gracilis is grown under vitamin B12 deficiency conditions, the amount of protein and of chlorophyll per cell increase with decrease of B12 in the medium and consequently in the cell . The increase in cell protein is proportional to and precedes an increase in the number of chloroplasts per cell . This replication of the chloroplasts under deficiency conditions is not accompanied by...

We have examined the effects of the antimicrotubule agent benomyl and several mutations on nuclear and mitochondrial movement in germlings of the filamentous fungus Aspergillus nidulans. While, as previously reported, benomyl inhibited nuclear division and movement, it did not inhibit mitochondrial movement. To test the effects of benomyl more rigorously, we germinated two benomyl super-sensiti...

Some of the factors that influence canker development in American sycamores inoculated with Botryodiplodia theobromae conidia were determined. A combination of B. theobromae culture filtrates and conidia resulted in 100% canker production when Iiitroduced into stem wounds; however. a combination of Cephalosporium diospyri culture filtrates and B. theobromae conidia resulted in no canker product...

Gametophyte cells of Phaoceros lacvis (L.) Prosk. have vacuole electric potentials (PDs) of about -175 millivolts; the steady PD is not affected by light but small transient PDs result after changing from light to darkness or darkness to ligt. The PD is more negative thn the Nernst potentials for any of the permeating ions. Changes in the concentration of any one of the external ions between 0....

Vascular smooth muscle cells (VSMC) in the rat mesenteric artery show specific immunofluorescent staining with antisera against purified human uterine myosin (ASMM) but not human platelet myosin (APM). However, in primary cultures produced by enzymatic dissociation of this vessel, VSMC stain specifically with both ASMM and APM within 5 h after plating and throughout growth to confluence (4-10 d...

Univalent antibody fragments prepared from a rabbit antiserum raised against whole human platelets completely inhibited adhesion of platelets to immobilized trimeric collagen in a defined, Mg2+-dependent, adhesion assay. An octylglucoside extract of whole platelets completely neutralized this antibody, and all neutralizing activity bound to immobilized wheat germ agglutinin. Further fractionati...