• 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
Bacterial Age
Bacterial Age

... or transform into the daughter cell immediately after division (reproduction). The relationship between the two cells formed by the division is of mother-daughter type, not the widely accepted twin-sister type. With these understandings, the bacterial age can be established on the true genealogical ...
Lymphadenosis Benigna Cutis or Cutaneous Lymphoid Hyperplasia
Lymphadenosis Benigna Cutis or Cutaneous Lymphoid Hyperplasia

... long- term antigenic stimulation are implicated in many cases.[5] Other causes include arthropod bite, borrelia infection, as a postzoster phenomenon[6];in HIV infected individuals[7] or after tattoos, exposure to gold and nickel, vaccinations, and taking drugs such as antihistaminics and phenytoin. ...
Full_CAD_Artical - Synbio.Construction
Full_CAD_Artical - Synbio.Construction

... the morphology and behavior of biological systems is derived from groups of different genes being expressed through the more complex (compared to the genome) proteome—the entire population of proteins produced by a cell or organism at particular growth stages or in particular environments [4]. This ...
PDF
PDF

... Multiple cardiac defects in Ets1–/– mice To investigate the cause of the perinatal lethality observed in the Ets1-deficient mice, we performed histological analysis on twelve E16.5 to postnatal day (P) 0 Ets1–/– animals (Fig. 1). Eleven of the twelve animals examined showed a membranous ventricular ...
Guanine Nucleotides Modulate the Effects of Brefeldin A in
Guanine Nucleotides Modulate the Effects of Brefeldin A in

... (Donaldson et al., 1990). The ll0-kD protein also redistributed to the cytosol, in a manner indistinguishable from BFA-treated cells, when cellular ATP levels were depleted by treatment with sodium azide and 2-deoxyglucose (Donaldson et al., 1990). The ability of ATP levels to regulate the distribut ...
1 The Role of Receptor-Like Kinases in
1 The Role of Receptor-Like Kinases in

... Single loss-of-function mutations in THE1 in an otherwise wild-type background did not result in any detectable change in plant growth and development (Hematy et al., 2007), suggesting that THE1 function is only revealed when the cell wall is perturbed. However, recent studies have shown that THE1 i ...
A Model of Primitive Streak Initiation in the Chick Embryo
A Model of Primitive Streak Initiation in the Chick Embryo

... signalling. There may be a delay between signalling and production of the inhibitor. E The production rate of the inhibitor by the uncommitted cells is zero when the inhibitor concentration is zero and increases with that concentration, but always remains below a certain maximal rate. E The activato ...
Lipid raft–associated protein sorting in exosomes
Lipid raft–associated protein sorting in exosomes

Auxin and the Communication Between Plant Cells
Auxin and the Communication Between Plant Cells

... This nitrogenase dates back to the earliest, anoxic phases of life on this planet and is therefore highly sensitive to oxygen; therefore, to safeguard nitrogenase activity, any photosynthetic activity has to be excluded from heterocysts. These cells are therefore hypocellular with respect to assimil ...
Sugar-Regulated Expression of a Putative
Sugar-Regulated Expression of a Putative

... (Saccharomyces cerevisiae) has made important advances in recent years and has become a strong base for the elucidation of nutrient-sensing mechanisms in other eukaryotic organisms (Rolland et al., 2001, 2002). In yeast, two particular members of the family of Glc transporters RGT2 and SNF3 have bee ...
Phalloidin
Phalloidin

... samples within a week of staining and storing stained specimens at 4oC, protected from light. Staining Living Cells Fluorescently-labeled phalloidin is not cell-permeant and have therefore has not been used extensively with living cells. However, living cells have been labeled by pinocytosis or unkn ...
processing of defensive pigment in aplysia californica: acquisition
processing of defensive pigment in aplysia californica: acquisition

... active defense against predatory attacks (e.g. see Eisner, 1970). Some species accumulate distasteful secondary plant toxins from their diet and distribute them throughout the body as a distasteful, passive chemical defense against predation (Brower and Calvert, 1984). For some, their chemical defen ...
Monitoring the Disassembly of Virus
Monitoring the Disassembly of Virus

... The VLP derived from the bacteriophage Qβ is formed from 180 copies of a 132 amino acid subunit24 and was chosen as a model for the introduction. Qβ-VLP is considered to be more stable compared with other VLPs, such as MS2, due to intersubunit disulfide linkages.24 One approach to introducing uAAs in ...
Actin-based motility of endosomes is linked to the polar tip growth of
Actin-based motility of endosomes is linked to the polar tip growth of

... is mediated via specific recruitment of PI3Ks, supporting local production of PI(3)P to these membranes by regulatory GTPases, such as Ypt51p and Rab5 (Gruenberg, 2001; Zerial and McBride, 2001). While both FYVE-domain proteins as well as endosomally localized Rab GTPases are conserved in plants, it ...
Human Genetics Lab #1 – Physical Traits (Day 3)
Human Genetics Lab #1 – Physical Traits (Day 3)

... Most human genetic traits are the product of interactions between several genes. Many of the traits included in this activity, however, are part of the small number that may be due to only one pair of alleles. More information about these traits is listed below. Note that scientists usually use the ...
Induction of oxidative stress
Induction of oxidative stress

... GI Mucosal Protective Factors It is hard to prevent oxidative stress, especially if damage has already occurred (such as a heart attack or stroke). It may be possible, however, to accelerate the restoration of cells after oxidative stress has occurred. ...
Full-Text PDF
Full-Text PDF

... attachment to insect host cells and regulation of cell length [23,55–58]. One of the first morphological features to be observed during the cell cycle is the transition through G1, and the nucleation of a subset of four microtubules that originate near the basal bodies, (please refer to “4MT” below) ...
Sodium Current Density Correlates with Expression of Specific
Sodium Current Density Correlates with Expression of Specific

Identification of Bacterial Species
Identification of Bacterial Species

... streaking is to place individual cells on an agar plate so that an individual cell will divide many times to produce a colony. Once you have an isolated colony, you have millions of genetically identical cells, which can be used in identification tests. In this exercise, you will examine the streake ...
Open Access - Scientific Research Publishing
Open Access - Scientific Research Publishing

... Usually, plant cells have relatively rigid cell walls that are tightly joined to the adjacent cell walls maintaining the tissue integrity. The growing plant cells have been assumed to be hyper-rectangles with a defined aspect ratio of the longest side to the shortest side. The well-described develop ...
System approaches to study root hairs as a single cell plant model
System approaches to study root hairs as a single cell plant model

... proportion of non-responding cells. For example, if a gene is expressed at a low level, does this mean that it is indeed lowly expressed or is it highly expressed, but only in a few cells? In order to avoid these issues, we adopted the soybean root hair cell, derived from a single, differentiated ro ...
Molecular differences between the rostral and caudal halves of the
Molecular differences between the rostral and caudal halves of the

... The molecular nature of the differences between rostral and caudal half-sclerotome cells is not understood. However, the cells of the rostral half appear to express cytotactin (Tan et al. 1987), tenascin (Mackie et al. 1988) and butyrylcholinesterase activity (Layer et al. 1988), while the cells of ...
PDF
PDF

... family of tetrapod-restricted transcriptional factors that coevolved with ERVs (Emerson and Thomas, 2009; Friedman et al., 1996; Thomas and Schneider, 2011; Urrutia, 2003). KAP1 has previously been demonstrated to maintain ERVs in a silent state in embryonic stem (ES) cells via the histone methyltra ...
Pathogenicity and Commensalism Recognition Contribute to Fungal
Pathogenicity and Commensalism Recognition Contribute to Fungal

... forces driving the evolution of the DC-mediated IR. Although much progress has been made in the study of the immune system under challenge from fungal pathogens, there remain numerous aspects of the tolerogenic response in fungi normally under control that are poorly understood. Understanding the me ...
Roles of FGFs as adipokines in adipose tissue development
Roles of FGFs as adipokines in adipose tissue development

... transplantation of WAT into these mice (Véniant et al., 2012). These findings indicate that WAT is a predominant site conferring the antidiabetic activities of FGF21. Adiponectin has many functional similarities to FGF21. Adiponectin as an adipokine controls systemic glucose and lipid homeostasis in ...
< 1 ... 151 152 153 154 155 156 157 158 159 ... 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 © 2025
  • DMCA
  • Privacy
  • Terms
  • Report