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Related Concept Videos

Bacterial Transformation01:33

Bacterial Transformation

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In 1928, bacteriologist Frederick Griffith worked on a vaccine for pneumonia, which is caused by Streptococcus pneumoniae bacteria. Griffith studied two pneumonia strains in mice: one pathogenic and one non-pathogenic. Only the pathogenic strain killed host mice.
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A device that transforms voltages from one value to another using induction is called a transformer. A transformer consists of two separate coils, or windings, wrapped around the same soft iron core. However, they are electrically insulated from each other.
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Microbial communities are dynamic environments where cell lysis releases free DNA into the surroundings. Other cells can take up this extracellular DNA through a process known as transformation.When a cell incorporates this foreign DNA into its genome, resulting in genetic modification, the process is known as transformation. Cells capable of this process are termed competent. Competence can be natural, as observed in certain bacteria and archaea, or artificially induced in the...
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The Ideal Transformer

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In single-phase two-winding transformers, two windings are coiled around a magnetic core characterized by cross-sectional area A and magnetic permeability μ. A phasor current i1 enters the left winding while i2 exits the right winding, establishing the fundamental working of the transformer through electromagnetic principles.
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Properties of the z-Transform II01:16

Properties of the z-Transform II

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The property of Accumulation in signal processing is derived by analyzing the accumulated sum of a discrete-time signal and using the time-shifting property to determine its z-transform. This principle reveals that the z-transform of the summed signal is related to the z-transform of the original signal by a multiplicative factor.
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Three-Winding Transformers01:19

Three-Winding Transformers

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Three identical single-phase transformers can be configured to form a three-phase transformer connection, which involves high-voltage and low-voltage windings. The high-voltage windings are denoted by capital letters A-B-C, while the low-voltage windings are labeled with lowercase letters a-b-c, representing their respective phases. This notation helps distinguish between the high and low voltage sides of the transformer.
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Related Experiment Video

Updated: Jan 29, 2026

Identification of Critical Conditions for Immunostaining in the Pea Aphid Embryos: Increasing Tissue Permeability and Decreasing Background Staining
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Identification of Critical Conditions for Immunostaining in the Pea Aphid Embryos: Increasing Tissue Permeability and Decreasing Background Staining

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A simple system for pea transformation.

S J Bean1, P S Gooding1, P M Mullincaux1

  • 1John Innes Centre, Norwich Research Park, NR4 7UH, Colney, Norwich, UK.

Plant Cell Reports
|February 8, 2019
PubMed
Summary
This summary is machine-generated.

Researchers developed a new Agrobacterium tumefaciens-mediated transformation system for pea plants using dry seeds. This efficient method rapidly produces normal, fertile transgenic pea plants without a callus phase.

Keywords:
Agrobacterium tumefaciensBar geneCotyledonary meristemPea transformationPhosphinothricin resistance

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Area of Science:

  • Plant biotechnology
  • Molecular biology
  • Genetics

Background:

  • Developing efficient plant transformation systems is crucial for genetic research and crop improvement.
  • Previous Agrobacterium tumefaciens-mediated transformation methods often require specific explants and can involve lengthy procedures.
  • Pisum sativum (pea) transformation has historically presented challenges.

Purpose of the Study:

  • To establish a reproducible and efficient Agrobacterium tumefaciens-mediated transformation system for Pisum sativum cv. Puget.
  • To overcome limitations of existing transformation protocols by utilizing dry seed material and avoiding intermediate callus formation.

Main Methods:

  • Utilized lateral cotyledonary meristems from germinating Pisum sativum cv. Puget seeds.
  • Employed Agrobacterium tumefaciens-mediated transformation techniques.
  • Focused on direct regeneration of transgenic shoots from meristematic tissue.

Main Results:

  • Successfully developed a reproducible Agrobacterium tumefaciens-mediated transformation system for pea.
  • The protocol uses dry seed as starting material, simplifying the process.
  • Transgenic shoots were rapidly generated without an intermediate callus phase.
  • Produced phenotypically normal, self-fertile transgenic pea plants.

Conclusions:

  • This novel transformation regime offers significant advantages in speed and efficiency over previously reported methods.
  • The system facilitates the rapid generation of functional transgenic pea plants with Mendelian inheritance of transgenes.
  • This advancement is valuable for genetic studies and breeding programs in Pisum sativum.