Cell distribution and regenerative activity following meniscus
... However, meniscus replacement (allograft transplantation or scaffold implantation) does not demonstrate universal clinical efficacy in the short or medium term and has not been proven to have a significant impact on the natural history of the meniscus-deficient knee in terms of degenerative change o ...
... However, meniscus replacement (allograft transplantation or scaffold implantation) does not demonstrate universal clinical efficacy in the short or medium term and has not been proven to have a significant impact on the natural history of the meniscus-deficient knee in terms of degenerative change o ...
Distribution of the Number of Clonogenic Tumor Cells Surviving
... implications of the work [3], the reader is referred to [4]. The points made there promise even a larger impact for a far more general and realistic model studied in the present work. The rationale for the extension of results obtained in [3] to arbitrary schedules of fractionated radiation is two-f ...
... implications of the work [3], the reader is referred to [4]. The points made there promise even a larger impact for a far more general and realistic model studied in the present work. The rationale for the extension of results obtained in [3] to arbitrary schedules of fractionated radiation is two-f ...
Leaf Development - Plant Ontology Wiki
... rapid rates of cell division; cells can differentiate • OZ - Organ zone: Site at which organ primordia (e.g.. leaf, flower) become distinct. • RM - Rib meristem: Gives rise to vascular and interior stem structures ...
... rapid rates of cell division; cells can differentiate • OZ - Organ zone: Site at which organ primordia (e.g.. leaf, flower) become distinct. • RM - Rib meristem: Gives rise to vascular and interior stem structures ...
Identification of a nuclear-localized nuclease from wheat cells
... acid [6]. Among the caspases participating in apoptosis, upstream caspases are known as initiators, whereas downstream caspases, which include caspase 3 and 7, are known as executioners because their activity leads to DNA degradation, chromatin condensation and nuclear membrane blebbing [7]. Caspase ...
... acid [6]. Among the caspases participating in apoptosis, upstream caspases are known as initiators, whereas downstream caspases, which include caspase 3 and 7, are known as executioners because their activity leads to DNA degradation, chromatin condensation and nuclear membrane blebbing [7]. Caspase ...
pteridophyta - Institutul de Biologie
... Histological analyses on semi fine section also revealed a similar structural architecture of the rhizome and leaves tissues (Fig. 1) both in vitro as well as in situ conditions. Comparative analyses of the iso-enzymatic spectra used as biochemical marker showed that certain loci can be used as mark ...
... Histological analyses on semi fine section also revealed a similar structural architecture of the rhizome and leaves tissues (Fig. 1) both in vitro as well as in situ conditions. Comparative analyses of the iso-enzymatic spectra used as biochemical marker showed that certain loci can be used as mark ...
Histoarchitecture and scanning electron microscopic studies of the
... especially in gross structure and size due to differences in habits. The surface architecture of the olfactory epithelium in fishes have been investigated by various authors (Zeiske et al. 1976, Cancalon 1983, Singh 1994, Mandal et al. 2005, Bhute and Baile 2007, Chakrabarti and Hazra Choudhury 2008 ...
... especially in gross structure and size due to differences in habits. The surface architecture of the olfactory epithelium in fishes have been investigated by various authors (Zeiske et al. 1976, Cancalon 1983, Singh 1994, Mandal et al. 2005, Bhute and Baile 2007, Chakrabarti and Hazra Choudhury 2008 ...
ELECTRON MICROSCOPY STUDY OF HARDBOARDS1 Lidija
... (P), and fibers (F) present. Dark granular material scattered between cells. x 3,040. FIG.2. High density, 0.5% PF. Large voids between the fibers. x 3,110. FIG.3. High density, 0.5% PF. Fibers attached in a bundle; middle lamella (ML) not changed. PF between the vessel (V) and parenchyma cell (P) a ...
... (P), and fibers (F) present. Dark granular material scattered between cells. x 3,040. FIG.2. High density, 0.5% PF. Large voids between the fibers. x 3,110. FIG.3. High density, 0.5% PF. Fibers attached in a bundle; middle lamella (ML) not changed. PF between the vessel (V) and parenchyma cell (P) a ...
Cell movements during epiboly and gastrulation in
... next hour of development, a rapid thinning of the blastoderm becomes evident, signifying epiboly is underway. The first change observable is very deep in the embryo, where the yolk cell begins to bulge or 'dome' towards the animal pole (Fig. IB). The blastoderm then rapidly takes on a cup-shaped app ...
... next hour of development, a rapid thinning of the blastoderm becomes evident, signifying epiboly is underway. The first change observable is very deep in the embryo, where the yolk cell begins to bulge or 'dome' towards the animal pole (Fig. IB). The blastoderm then rapidly takes on a cup-shaped app ...
1 A generalized quantitative antibody homeostasis model
... binds to IgM in immune complexes. The recently described IgM receptor, FcmuR, is also expressed by CD19 positive precursor B cells in human bone marrow 16. Furthermore in the mouse, FcmuR has been shown to be required for B-cell development 17. A simple – and by Occam’s razor most likely - possibili ...
... binds to IgM in immune complexes. The recently described IgM receptor, FcmuR, is also expressed by CD19 positive precursor B cells in human bone marrow 16. Furthermore in the mouse, FcmuR has been shown to be required for B-cell development 17. A simple – and by Occam’s razor most likely - possibili ...
IB Biology Study Guide
... is recessive, one could insert the dominatn allele that would prevent the disease into the cells that have been infected. Although this procedure could be done at several different stages during the human life cycle, the best cells to use are stem cells. They can divide repeatedly to replace lost bo ...
... is recessive, one could insert the dominatn allele that would prevent the disease into the cells that have been infected. Although this procedure could be done at several different stages during the human life cycle, the best cells to use are stem cells. They can divide repeatedly to replace lost bo ...
signaling events regulating removal of apoptotic cells
... experiments suggest that ELMO, Dock180, and CrkII are required for efficient engulfment of apoptotic targets (our unpublished observations) (Tosello-Trampont et al., 2007), but overexpression studies in both cell culture and Drosophila suggest that direct interaction between CrkII and Dock180 is not ...
... experiments suggest that ELMO, Dock180, and CrkII are required for efficient engulfment of apoptotic targets (our unpublished observations) (Tosello-Trampont et al., 2007), but overexpression studies in both cell culture and Drosophila suggest that direct interaction between CrkII and Dock180 is not ...
Effects of Antibiotics that Inhibit the Bacterial Peptidoglycan
... on the inhibition of plant cysteine synthase by D-cycloserine, the activity of Salmonella cysteine synthase is decreased (Nakamura et al. 1984). Although these enzymes are involved in metabolic pathways in chloroplasts, the relationship between changes in their enzymatic activities and chloroplast d ...
... on the inhibition of plant cysteine synthase by D-cycloserine, the activity of Salmonella cysteine synthase is decreased (Nakamura et al. 1984). Although these enzymes are involved in metabolic pathways in chloroplasts, the relationship between changes in their enzymatic activities and chloroplast d ...
- University of East Anglia
... receptors, on target cells. Frizzled mediated signaling can activate at least three different pathways. In the so-called classic pathway, binding of Wnt to its receptor results in activation of disheveled, which inactivates the cytoplasmic serine-threonine kinase GSK-3 (Moon et al., 2002). One targ ...
... receptors, on target cells. Frizzled mediated signaling can activate at least three different pathways. In the so-called classic pathway, binding of Wnt to its receptor results in activation of disheveled, which inactivates the cytoplasmic serine-threonine kinase GSK-3 (Moon et al., 2002). One targ ...
Viral Attack Comic Book Adventure - Ask a Biologist
... it was the size of a basketball, a virus would still only be about the size of a single period on this page. ...
... it was the size of a basketball, a virus would still only be about the size of a single period on this page. ...
Foreword
... process. However, since we have a poor understanding of how these processes influence and change cell wall ultrastructure and overall composition, these processes may alter the cell wall assembly of the bio-polymers in unintentional ways that lead to suboptimal extraction and utilisation of the resi ...
... process. However, since we have a poor understanding of how these processes influence and change cell wall ultrastructure and overall composition, these processes may alter the cell wall assembly of the bio-polymers in unintentional ways that lead to suboptimal extraction and utilisation of the resi ...
Dendritic Cell Development in Long
... CD205, CD80, CD86, B220, MHC-II (major histocompatibility complex-2), CD40, CD8α, and CD4. Currently there are three known subsets in spleen [17], two in thymus [17], and five in lymph node [18]. More recently, the distinct lineage of murine plasmacytoid DCs was identified in multiple organs on the ...
... CD205, CD80, CD86, B220, MHC-II (major histocompatibility complex-2), CD40, CD8α, and CD4. Currently there are three known subsets in spleen [17], two in thymus [17], and five in lymph node [18]. More recently, the distinct lineage of murine plasmacytoid DCs was identified in multiple organs on the ...
The Care and Feeding of the Microscope Lab 5
... between two points that are close together, so that they are seen as separate units; it is the ability of the lenses to distinguish fine detail and structure (or a measure of the clarity of the image). Example: A microscope with a resolving power of 0.4 nm can distinguish between two points if the ...
... between two points that are close together, so that they are seen as separate units; it is the ability of the lenses to distinguish fine detail and structure (or a measure of the clarity of the image). Example: A microscope with a resolving power of 0.4 nm can distinguish between two points if the ...
Cell-cycle regulation
... The cdk-4 Cdk4/6 kinase and cyd-1 D-type cyclin genes are required for progression through G1 phase during larval development (Boxem and van den Heuvel, 2001; Park and Krause, 1999). CYD-1 and CDK-4 likely act in complex, as indicated by their direct interaction in vitro and close similarity in null ...
... The cdk-4 Cdk4/6 kinase and cyd-1 D-type cyclin genes are required for progression through G1 phase during larval development (Boxem and van den Heuvel, 2001; Park and Krause, 1999). CYD-1 and CDK-4 likely act in complex, as indicated by their direct interaction in vitro and close similarity in null ...
Interaction of ZPR1 with translation elongation factor
... mitogen-stimulated release of ZPR1 from these receptors may trigger the accumulation of ZPR1 in the nucleus. Although this is a plausible hypothesis, it appears that this possible mechanism represents an oversimplification of the processes that control the subcellular localization of ZPR1. First, it ...
... mitogen-stimulated release of ZPR1 from these receptors may trigger the accumulation of ZPR1 in the nucleus. Although this is a plausible hypothesis, it appears that this possible mechanism represents an oversimplification of the processes that control the subcellular localization of ZPR1. First, it ...
CHAPTER 9 IMMUNOGLOBULIN BIOSYNTHESIS
... forming its normal pentameric structure; membrane IgM, therefore, exists exclusively in monomeric form (H2L2), also known as IgMS or "sub-unit" IgM. The two forms of mu chain are synthesized via an alternative splicing scheme analogous to that which allows simultaneous IgM and IgD synthesis (as was ...
... forming its normal pentameric structure; membrane IgM, therefore, exists exclusively in monomeric form (H2L2), also known as IgMS or "sub-unit" IgM. The two forms of mu chain are synthesized via an alternative splicing scheme analogous to that which allows simultaneous IgM and IgD synthesis (as was ...
Isolation and Quantitation of HIV in Peripheral
... nucleus surrounded by a single nuclear membrane and a translucent “bubble” (which is the consequence of the fusion of the cytoplasms) are usually visible either at the cellular pole opposite to the site where the nuclei are clustered (Fig. 12.2.1A) or surrounding the nuclei (Fig. 12.2.1B). “Old” sy ...
... nucleus surrounded by a single nuclear membrane and a translucent “bubble” (which is the consequence of the fusion of the cytoplasms) are usually visible either at the cellular pole opposite to the site where the nuclei are clustered (Fig. 12.2.1A) or surrounding the nuclei (Fig. 12.2.1B). “Old” sy ...
THE CELL THEORY
... Q3. Explain systemic theory of ageing. A3. According to the systemic theory, changes causing ageing are systemic in nature and occur in organ systems. These changes are not the same as those ones arising due to cell death or loss. The tissues which form organs interact with each other and thus one t ...
... Q3. Explain systemic theory of ageing. A3. According to the systemic theory, changes causing ageing are systemic in nature and occur in organ systems. These changes are not the same as those ones arising due to cell death or loss. The tissues which form organs interact with each other and thus one t ...
1. What is the product of mitosis? 2.What is the product of meiosis?
... • You need to know: • Structure of DNA • Structures from DNA -> Chromosome • Steps of protein synthesis • Organelles involved in protein synthesis • How cancer occurs ...
... • You need to know: • Structure of DNA • Structures from DNA -> Chromosome • Steps of protein synthesis • Organelles involved in protein synthesis • How cancer occurs ...
cathepsin-d is required for the growth of fibroblasts in - HAL
... was accompanied by increased proliferation, survival, migration, or invasiveness. As shown in Figure 4A, stable expression of wild-type or mutated D231N cath-D in cathD-deficient CD55-/- cells lead to a significant stimulation of proliferation relative to that of CD55-/-SV40 cells. Similar prolifera ...
... was accompanied by increased proliferation, survival, migration, or invasiveness. As shown in Figure 4A, stable expression of wild-type or mutated D231N cath-D in cathD-deficient CD55-/- cells lead to a significant stimulation of proliferation relative to that of CD55-/-SV40 cells. Similar prolifera ...
Cellular differentiation
In developmental biology, cellular differentiation isa cell changes from one cell type to another. Most commonly this is a less specialized type becoming a more specialized type, such as during cell growth. Differentiation occurs numerous times during the development of a multicellular organism as it changes from a simple zygote to a complex system of tissues and cell types. Differentiation continues in adulthood as adult stem cells divide and create fully differentiated daughter cells during tissue repair and during normal cell turnover. Some differentiation occurs in response to antigen exposure. Differentiation dramatically changes a cell's size, shape, membrane potential, metabolic activity, and responsiveness to signals. These changes are largely due to highly controlled modifications in gene expression and are the study of epigenetics. With a few exceptions, cellular differentiation almost never involves a change in the DNA sequence itself. Thus, different cells can have very different physical characteristics despite having the same genome.A cell that can differentiate into all cell types of the adult organism is known as pluripotent. Such cells are called embryonic stem cells in animals and meristematic cells in higher plants. A cell that can differentiate into all cell types, including the placental tissue, is known as totipotent. In mammals, only the zygote and subsequent blastomeres are totipotent, while in plants many differentiated cells can become totipotent with simple laboratory techniques. In cytopathology, the level of cellular differentiation is used as a measure of cancer progression. ""Grade"" is a marker of how differentiated a cell in a tumor is.