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関連する概念動画

Gram-negative Bacterial Protein Secretion Systems01:17

Gram-negative Bacterial Protein Secretion Systems

807
Gram-negative bacteria utilize sophisticated protein secretion systems to transport proteins across their double-membrane envelope into the extracellular environment or host cells. Based on their mechanism of action, these systems are classified into one-step and two-step pathways.One-Step Secretion Systems (Types I, III, IV, and VI)One-step secretion systems bypass the periplasm entirely, forming a continuous channel that spans both the inner and outer membranes:Type I Secretion System (T1SS):...
807
Positive, Negative, and Zero Work00:58

Positive, Negative, and Zero Work

22.0K
Work is done on an object when energy is transferred to the object. In other words, work is done when a force acts on a body that undergoes a displacement from one position to another. By definition, the work done by a force is the integral of the force with respect to the displacement along its path. Forces can vary as a function of position, and displacements can occur along various paths between two points. The magnitude of a force multiplied by the cosine of the angle that the force makes...
22.0K
Positive and Negative Feedback Loops01:18

Positive and Negative Feedback Loops

24.9K
Animal organs and organ systems constantly adjust to internal and external changes through a process called homeostasis ("steady state"). Examples of these changes include regulation of the level of glucose or calcium in the blood or internal responses to external temperatures. Homeostasis requires  maintaining an internal dynamic equilibrium:
24.9K
Sputum Studies I: Gram Stain, cytology, and Acid-fast smear and culture01:26

Sputum Studies I: Gram Stain, cytology, and Acid-fast smear and culture

603
Sputum studies are a critical part of diagnosing and treating numerous respiratory conditions. These studies involve obtaining sputum samples for analysis to identify pathogenic organisms and assess the presence of abnormal cells indicative of malignant conditions. This lesson will delve into three fundamental sputum studies: Gram Stain, Cytology, and Acid-fast Smear and Culture.
Gram Stain
The Gram Stain is an integral part of sputum studies. It involves the staining of sputum, which permits...
603
Negative Regulator Molecules01:23

Negative Regulator Molecules

38.3K
Positive regulators allow a cell to advance through cell cycle checkpoints. Negative regulators have an equally important role as they terminate a cell’s progression through the cell cycle—or pause it—until the cell meets specific criteria.
38.3K
Position-effect Variegation02:32

Position-effect Variegation

7.0K
In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.
7.0K

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関連する実験動画

Updated: Jan 22, 2026

Isolation and Chemical Characterization of Lipid A from Gram-negative Bacteria
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Isolation and Chemical Characterization of Lipid A from Gram-negative Bacteria

Published on: September 16, 2013

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グラム陽性およびグラム陰性バクテリアのための比率計 pH センサー

Dorothea Kossmann1, Aya Iizuka2,3, Nina Khanna2,4

  • 1Department of Chemistry, University of Zurich, Zurich 8057, Switzerland.

Journal of the American Chemical Society
|January 20, 2026
PubMed
まとめ

No abstract available in PubMed .

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Generating Transposon Insertion Libraries in Gram-Negative Bacteria for High-Throughput Sequencing
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Microfluidic Acoustophoresis for Flowthrough Separation of Gram-Negative Bacteria using Aptamer Affinity Beads
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関連する実験動画

Last Updated: Jan 22, 2026

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Isolation and Chemical Characterization of Lipid A from Gram-negative Bacteria

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