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Related Concept Videos

Mass Analyzers: Common Types01:19

Mass Analyzers: Common Types

The quadrupole mass analyzer consists of four cylindrical metal rods arranged in a diamond carrying a DC voltage and a radio-frequency AC voltage. The motion of ions through the quadrupole depends on the field strength, causing only ions of a certain m/z to resonate successfully and strike the detector at a given field strength. Though the transmission rate for these analyzers is high, the exact elemental composition of the sample is not determined because of low resolution; however, they are...
Extraction: Partition and Distribution Coefficients01:14

Extraction: Partition and Distribution Coefficients

The distribution law or Nernst's distribution law is the law that governs the distribution of a solute between two immiscible solvents. This law, also known as the partition law, states that if a solute is added to the mixture of two immiscible solvents at a constant temperature, the solute is distributed between the two solvents in such a way that the ratio of solute concentrations in the solvents remains constant at equilibrium.
For extracting a solute from an aqueous phase into an organic...
Distribution and Dispersion00:54

Distribution and Dispersion

Ecology is the study of how organisms interact with their environment and with one another. An important aspect of ecology is understanding where species are found and how individuals are distributed within those areas. The geographic range of a species refers to the total area where its members are located, while dispersion describes the pattern of spacing of individuals within that range.Geographic Range and Dispersion PatternsWithin a species’ geographic range, individuals may be distributed...
Deleterious Substances in Aggregate01:25

Deleterious Substances in Aggregate

Deleterious substances in aggregates can be detrimental to the quality and durability of concrete. These substances include organic impurities like loam, which interfere with cement hydration and are usually present in the sand. These prevent a good bond between aggregate and cement paste. Organic impurities can be detected using the colorimetric test, where the darkness of a solution after agitation indicates the level of organic content.
Another type of impurity is clay and fine material that...
Conservative Site-specific Recombination and Phase Variation02:53

Conservative Site-specific Recombination and Phase Variation

Because the DNA segments are cut and reorganized in a direction-specific manner, site-specific recombination has emerged as an efficient genetic engineering technique. Flippase and Cyclization recombinases or Flp and Cre, respectively, are two members of the tyrosine recombinase family derived from bacteriophages, that are used to mediate site-specific DNA insertions, deletions, and targeted expression of proteins in mammalian cell lines.
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Mass Analyzers: Overview01:13

Mass Analyzers: Overview

The mass analyzer is a crucial component of the mass spectrometer. In the ionization chamber, the vaporized sample is bombarded with a high-energy electron beam to generate a radical cation and further fragment into neutral molecules, radicals, and cations. A series of negatively charged accelerator plates accelerate the cations into the mass analyzer. The mass analyzer separates ions according to their mass-to-charge (m/z) ratios and then directs them to the detector. The common types of mass...

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Related Experiment Video

Updated: Jun 25, 2026

Identification of Metabolically Active Bacteria in the Gut of the Generalist Spodoptera littoralis via DNA Stable Isotope Probing Using 13C-Glucose
12:11

Identification of Metabolically Active Bacteria in the Gut of the Generalist Spodoptera littoralis via DNA Stable Isotope Probing Using 13C-Glucose

Published on: November 13, 2013

Targeted spreader identification via lexicographic core decomposition.

Arianna D'Ulizia1, Alessia D'Andrea2, Riccardo Denni1

  • 1Consiglio Nazionale delle Ricerche, Rome, Italy.

Scientific Reports
|June 23, 2026
PubMed
Summary

Lexipeeling, a new method for network analysis, prioritizes node importance based on category preferences. It outperforms existing methods in identifying key influencers, with composite approaches further refining accuracy.

Keywords:
Centrality measuresComplex networksCore decompositionEpidemic spreadingInfluential nodes

Related Experiment Videos

Last Updated: Jun 25, 2026

Identification of Metabolically Active Bacteria in the Gut of the Generalist Spodoptera littoralis via DNA Stable Isotope Probing Using 13C-Glucose
12:11

Identification of Metabolically Active Bacteria in the Gut of the Generalist Spodoptera littoralis via DNA Stable Isotope Probing Using 13C-Glucose

Published on: November 13, 2013

Area of Science:

  • Network Science
  • Data Mining
  • Computational Social Science

Background:

  • Standard centrality measures assess node importance globally.
  • Network analysis often requires prioritizing specific node categories.
  • Existing methods lack category-aware importance evaluation.

Purpose of the Study:

  • To introduce lexicographic core decomposition (lexipeeling) for category-aware node importance.
  • To evaluate lexipeeling's effectiveness against numerous baselines.
  • To develop composite methods for refining lexipeeling's tie-breaking.

Main Methods:

  • Extending standard core decomposition to a lexicographic setting.
  • Implementing the lexipeeling algorithm.
  • Evaluating lexipeeling and composite methods on 7 real-world networks against 79 baselines.

Main Results:

  • Lexipeeling successfully ranks true top spreaders higher than baselines on most datasets.
  • Lexipeeling achieves high Mean Reciprocal Rank (MRR) scores.
  • Composite methods, particularly lexipeeling-degree, improve tie-breaking and influencer identification.

Conclusions:

  • Lexipeeling provides a novel, category-aware approach to network node importance.
  • Lexipeeling and its composite variants offer superior performance in identifying influential nodes.
  • The proposed methods enhance the analysis of influence in categorized networks.