نتایج جستجو برای: colony growth
تعداد نتایج: 862540 فیلتر نتایج به سال:
Factors that regulate the growth and development of primitive bone marrow stromal cell precursors are not well defined. We have examined 25 purified recombinant growth factors for their ability to initiate and support clonogenic growth of fibroblast colony-forming cells (CFU-F) from adult human bone marrow. Assays were performed using bone marrow mononuclear cells (BMMNC) enriched in CFU-F by m...
BACKGROUND Allometric studies have shown that individual growth rate is inversely related to body size across a broad spectrum of organisms that vary greatly in size. Fewer studies have documented such patterns within species. No data exist directly documenting the influence of colony size on growth rate for microscopic, colonial organisms. METHODOLOGY/PRINCIPAL FINDINGS To determine if simil...
Abstract The antimicrobial effect of Cu is dependent on several factors, including the physiological state test-cultures. present study aimed to compare antibacterial newly developed Cu-coated surface, using bacterial cultures Staphylococcus epidermidis and Pseudomonas putida harvested at exponential (6h) stationary (24h) phases growth as well from a colony. Growth kinetics cell morphology were...
A possible role for calmodulin in the colony growth of human hematopoietic progenitor cells was investigated using pharmacologic approaches. We obtained evidence for a dose-dependent inhibition of colony formation of myeloid progenitor cells (CFU-C) stimulated by interleukin-3 (IL-3), granulocyte-macrophage colony-stimulating factor (GM-CSF), or granulocyte CSF (G-CSF) by three calmodulin antag...
Autocrine growth mechanisms of leukemic blast progenitors in acute myeloblastic leukemia (AML) were investigated. Colony formation of leukemic blast progenitors was observed in 14 of 14 patients tested when purified blast cell fraction depleted of both T cells and monocytes was plated in methylcellulose without any colony-stimulating factor (CSF). However, there existed a minimal cell density r...
Ants often form mutualistic interactions with aphids, soliciting honeydew in return for protective services. Under certain circumstances, however, ants will prey upon aphids. In addition, in the presence of ants aphids may increase the quantity or quality of honeydew produced, which is costly. Through these mechanisms, ant attendance can reduce aphid colony growth rates. However, it is unknown ...
Erratum Unfortunately, the original version of this article [1] contained an error. There are two references in the text to the threshold for defining VAP as greater than 10^4 colony forming units/ml. These should read greater OR EQUAL to 10^4 colony forming units/ml. The error is in the abstract and in the intervention sections. In the abstract, please replace: Patients with clinically suspect...
Abstract Microbial growth characteristics have long been used to investigate fundamental questions of biology. Colony-based high-throughput screens enable parallel fitness estimation thousands individual strains using colony as a proxy for fitness. However, is complicated by spatial biases affecting growth, including uneven nutrient distribution, agar surface irregularities, and batch effects. ...
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