• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Retroviruses and oncogenes II
Retroviruses and oncogenes II

... The ways in which these answers emerged are illuminating. In Denver, insight came from an inspired guess, based on the pleiotropism of src (22): protein phosphorylation ranks among the most versatile agents of change known to biochemists. In our laboratory, enzymological reasoning led the way (23): ...
Living together in biofilms: the microbial cell factory and its
Living together in biofilms: the microbial cell factory and its

... from the biofilm surface to the surrounding medium; it usually occurs in the early stages of biofilm development. Detachment involves external forces, such as abrasion, grazing, and erosion that are sufficient to disrupt the biofilm’s structure. In dispersion, regulatory systems enable physiological ...
Chromium(VI) treatment of normal human lung cells results in
Chromium(VI) treatment of normal human lung cells results in

... sequence in human diploid lung fibroblasts (LL 24) exposed to sodium chromate. Alphoid DNA was chosen because it comprises 1-5% of the genome providing an abundant target for the replication-mapping. Our results show that treatment of living cells with chromium(VI) resulted in a dose-dependent, guan ...
The change of HERS cell number and gene expression profile by
The change of HERS cell number and gene expression profile by

... Once again, this data mimics our previously obtained results for the decrease of proliferating cells and root elongation [1]. Furthermore, little is reported about the effects of the early stage of occlusion during root development. Thus, occlusion during root development is important to HERS even i ...
The effect of temperature shifts on protein synthesis
The effect of temperature shifts on protein synthesis

... It is well known that the relationships between temperature and the growth rate of bacteria are characterized by straight lines in the Arrhenius profiles in the middle temperature range, with distinct changes in slope at temperatures higher and lower than the optimum range. The forms of such Arrheni ...
Comparative Biochemistry of the Oxidative Burst Produced by Rose
Comparative Biochemistry of the Oxidative Burst Produced by Rose

... plasma membrane lipids, induced by ROS, may kill cells directly. Alternatively, superoxide (Jabs et al., 1996) or H2O2 (Levine et al., 1994) may serve as signals leading indirectly to mortality. However, in at least one case it has been shown that an oxidative burst by itself is not sufficient to tr ...
Overview of the cell
Overview of the cell

... dormant until conditions become favourable ...
Cytochrome c Is Released in a Reactive Oxygen
Cytochrome c Is Released in a Reactive Oxygen

... Cyt c release from mitochondria was investigated by immunoblot analysis using a monoclonal antibody against cyt c. Both cytosolic and mitochondrial fractions, obtained from TBY-2 cells subjected to HS (cells in these conditions will be referred to as HS cells), were examined. Typical immunoblots are ...
PowerPoint - New Mexico FFA
PowerPoint - New Mexico FFA

... make tissue culture possible ...
The Evolution of Robust Development and Homeostasis in Artificial
The Evolution of Robust Development and Homeostasis in Artificial

... organisms were subjected to a round of mutation and recombination to generate the next generation of 1000. This process of mutation, development and selection was then reiterated for 30 generations, and the process of evolution repeated 36 times to generate a zoo of evolved CAs, which we hoped would ...
Modeling of intercellular transport for emerging applications in
Modeling of intercellular transport for emerging applications in

... estimated from values from the literature and / or extracted from experimental results and / or set to an arbitrary value. The VHDL-AMS implementation performed on the second model is very interesting. Up to now, we demonstrated that the gene regulatory network inside a cell can be modeled by equiva ...
Antigen Export during Liver Infection of the Malaria - edoc
Antigen Export during Liver Infection of the Malaria - edoc

... synthesized during parasite development and exported to the host hepatocyte. In support of the former notion, it has been proposed that hepatocytes only present antigens that are secreted into the cytoplasm after invasion or during cell traversal (29, 30). Recent genome-wide immune profiling approac ...
Prokaryotes - NIU Department of Biological Sciences
Prokaryotes - NIU Department of Biological Sciences

... membrane, but there are no internal membranes. Outside the membrane is a cell wall, and sometimes an outer capsule which can have structures projecting form it. Bacteria move using flagella: whip-like hairs similar to the flagellum of a sperm cell. ...
ER Membrane Protein Complex Required for Nuclear
ER Membrane Protein Complex Required for Nuclear

... opposite mating type. After fusion of the two plasma membranes of the mating cells, a dinucleated cell forms initially in which the two haploid nuclei then rapidly fuse to form a single diploid nucleus. This latter event, called karyogamy, can be divided into two distinct steps: the microtubule-base ...
Form equals function? Bacterial shape and its consequences for
Form equals function? Bacterial shape and its consequences for

... overexpression of E. coli PBP5, which results in transformation of rod-shaped cells into spherical forms (Markiewicz et al., 1982). In Vibrio parahaemolyticus, which transforms into spheres when subjected to starvation (Jiang and Chai, 1996), concomitant changes were observed in the spatial organiza ...
Bacteria
Bacteria

... membrane, but there are no internal membranes. Outside the membrane is a cell wall, and sometimes an outer capsule which can have structures projecting form it. Bacteria move using flagella: whip-like hairs similar to the flagellum of a sperm cell. ...
Geometrical constraints in the scaling relationships between
Geometrical constraints in the scaling relationships between

... location of ATP-synthesis complexes). Assuming that an increase in cell size leads to a proportional increase in the number of organelles [53], the rate of whole-cell metabolism should scale with GS with the scaling exponent 1. Therefore, mass-specific metabolic rate should be independent of GS (GS1 ...
How to present a scientific paper
How to present a scientific paper

... • Lactate dehydrogenase A (LDH-A) is a key glycolytic enzyme, and its expression is increased in mouse mammary epithelial cells that overexpress a form of ErbB2 • Heat shock factor 1 (HSF1) is a transcription factor that regulates glucose metabolism which is itself regulated by Ras (a target of ErbB ...
The origins of multicellular organisms
The origins of multicellular organisms

... alignment‐of‐fitness phase in which genetic similarity among cells prevents cell–cell conflict and an export‐of‐fitness phase in which cells become interdependent and collaborate in a sustained effort (reviewed by Folse and Roughgarden 2012). The first phase can be achieved by any “unicellular bottlenec ...
Licensed to: iChapters User
Licensed to: iChapters User

... Each cell performs these specialized activities in addition to The type and extent of controlled exchange vary, depending carrying on the unceasing, fundamental activities required of on the location and function of the epithelial tissue. For examall cells. The basic cell functions are essential for ...
T. brucei basal body component - Journal of Cell Science
T. brucei basal body component - Journal of Cell Science

... and COS cells as well as the centriole of mouse spermatozoa, indicating that a TBBC-like centriolar component has been conserved during the evolution of eukaryotes. ...
Fertilization in Mammals
Fertilization in Mammals

... different allele frequencies than the parental population. Natural selection occurs when a new phenotype appears in a few members of a population that allows them to better utilize the available resources. These individuals are more likely to survive and have more offspring than those individuals th ...
PPT 3 Cell Boundaries
PPT 3 Cell Boundaries

... Endocytosis and Exocytosis Endocytosis is the process of taking material into the cell. ...
Negative regulation of the interferon response by
Negative regulation of the interferon response by

... in mammalians, a much larger fraction of the genome is transcribed into long non-coding transcripts (1,2). These transcripts, the long non-coding RNAs (lncRNAs), constitute a novel layer of regulatory factors with important roles in almost every aspect of cellular function (3–9). The expression of m ...
Stem Cell: Past, Present and Future- A Review
Stem Cell: Past, Present and Future- A Review

... Pleuripotency of embryonic stem cells: Embryonic stem cells can give rise to cells from all three embryonic germ layers i.e. ectoderm, mesoderm and endoderm, even after being grown in culture for a long time. In other words they can develop into each of more than 220 cell types of the adult body whe ...
< 1 ... 291 292 293 294 295 296 297 298 299 ... 1231 >

Amitosis

Amitosis (a- + mitosis) is absence of mitosis, the usual form of cell division in the cells of eukaryotes. There are several senses in which eukaryotic cells can be amitotic. One refers to capability for non-mitotic division and the other refers to lack of capability for division. In one sense of the word, which is now mostly obsolete, amitosis is cell division in eukaryotic cells that happens without the usual features of mitosis as seen on microscopy, namely, without nuclear envelope breakdown and without formation of mitotic spindle and condensed chromosomes as far as microscopy can detect. However, most examples of cell division formerly thought to belong to this supposedly ""non-mitotic"" class, such as the division of unicellular eukaryotes, are today recognized as belonging to a class of mitosis called closed mitosis. A spectrum of mitotic activity can be categorized as open, semi-closed, and closed mitosis, depending on the fate of the nuclear envelope. An exception is the division of ciliate macronucleus, which is not mitotic, and the reference to this process as amitosis may be the only legitimate use of the ""non-mitotic division"" sense of the term today. In animals and plants which normally have open mitosis, the microscopic picture described in the 19th century as amitosis most likely corresponded to apoptosis, a process of programmed cell death associated with fragmentation of the nucleus and cytoplasm. Relatedly, even in the late 19th century cytologists mentioned that in larger life forms, amitosis is a ""forerunner of degeneration"".Another sense of amitotic refers to cells of certain tissues that are usually no longer capable of mitosis once the organism has matured into adulthood. In humans this is true of various muscle and nerve tissue types; if the existing ones are damaged, they cannot be replaced with new ones of equal capability. For example, cardiac muscle destroyed by heart attack and nerves destroyed by piercing trauma usually cannot regenerate. In contrast, skin cells are capable of mitosis throughout adulthood; old skin cells that die and slough off are replaced with new ones. Human liver tissue also has a sort of dormant regenerative ability; it is usually not needed or expressed but can be elicited if needed.
  • studyres.com © 2026
  • DMCA
  • Privacy
  • Terms
  • Report