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Related Concept Videos

The Electromagnetic Spectrum02:37

The Electromagnetic Spectrum

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The electromagnetic spectrum consists of all the types of electromagnetic radiation arranged according to their frequency and wavelength. Each of the various colors of visible light has specific frequencies and wavelengths associated with them, and you can see that visible light makes up only a small portion of the electromagnetic spectrum. Because the technologies developed to work in various parts of the electromagnetic spectrum are different, for reasons of convenience and historical...
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The Electromagnetic Spectrum01:24

The Electromagnetic Spectrum

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Electromagnetic waves are categorized according to their wavelengths and frequencies, giving the electromagnetic spectrum. These waves are classified as radio, infrared, ultraviolet, etc. Radio waves refer to electromagnetic radiation with wavelengths ranging from millimeters to kilometers. Radio waves are commonly used for audio communications (i.e., radios) and typically result from an alternating current in the wires of a broadcast antenna. They cover a broad wavelength range and are used...
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IR Spectrum01:19

IR Spectrum

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When infrared (IR) radiation passes through a molecule, the bonds stretch or bend by absorbing the radiation. This absorption creates the molecule's absorption spectrum, which is the plot of its percentage transmittance versus wavenumber.
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Distribution of Stresses in a Narrow Rectangular Beam01:11

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In studying beam stress distribution, examining an elemental section is essential. To determine the average shearing stress on this face, the calculated shear is divided by the surface area. Importantly, shearing stresses on the beam's transverse and horizontal planes mirror each other, indicating a consistent stress distribution along the upper region of the beam. Notably, shearing stresses are absent at the beam's upper and lower surfaces due to the absence of applied forces in these...
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Mass Spectrum01:23

Mass Spectrum

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A mass spectrum is the graphical representation of the relative abundance of the charged fragments in an analyte plotted against their mass-to-charge ratio (m/z). The plot's x-axis represents the ratio of the mass of the charged fragment to the number of charges it carries. The y axis of the plot represents the relative abundance of each charged species. The relative abundance is calculated from the signal intensity of each charged species recorded at the detector. The most intense signal (the...
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When light passes through a substance, a portion of the light is absorbed while the remaining light is reflected or transmitted. If the molecule absorbs light between the wavelengths of 180–400 nm range, the UV spectrum is obtained, and if it absorbs light in the 400–780 nm wavelength range, the visible spectrum is obtained.     
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Narrow-Spectrum Antibacterial Agents.

Roberta J Melander1, Daniel V Zurawski2, Christian Melander1

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This summary is machine-generated.

Narrow-spectrum antibiotics offer a targeted approach to bacterial infections, potentially reducing resistance and microbiome disruption. This review explores their benefits, challenges, and development for key pathogens like Clostridium difficile and Mycobacterium tuberculosis.

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Area of Science:

  • Microbiology
  • Infectious Diseases
  • Pharmacology

Background:

  • Broad-spectrum antibiotics are crucial but contribute to antibiotic resistance and disrupt the host microbiome.
  • Targeted therapy with narrow-spectrum agents can mitigate these adverse effects when the causative agent is identified.

Purpose of the Study:

  • To review the advantages and challenges of narrow-spectrum antibacterial agents.
  • To discuss advancements in diagnostics enabling their clinical use.
  • To highlight current narrow-spectrum agents targeting significant bacterial pathogens.

Main Methods:

  • Literature review of scientific publications and clinical trial data.
  • Analysis of diagnostic technologies for pathogen identification.
  • Survey of emerging narrow-spectrum antibiotics and their targets.

Main Results:

  • Narrow-spectrum antibiotics show promise in combating resistance and preserving the microbiome.
  • Diagnostic development is progressing, facilitating targeted treatment strategies.
  • Several narrow-spectrum agents are under investigation for challenging infections.

Conclusions:

  • Narrow-spectrum antibiotics represent a vital strategy to combat bacterial infections responsibly.
  • Further development of diagnostics and targeted agents is essential for clinical implementation.
  • This approach holds significant potential for managing infections caused by pathogens like Clostridium difficile, Mycobacterium tuberculosis, and ESKAPE organisms.