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Related Concept Videos

Passive Filters01:27

Passive Filters

1.0K
Passive filters are utilized to shape the frequency spectrum of signals across a diverse array of applications. These filters, using only passive elements like resistors (R), inductors (L), and capacitors (C), are capable of selectively allowing or blocking certain frequency ranges without the need for external power sources.
Low-Pass Filters
Low-pass filters are designed to transmit signals with frequencies lower than the cutoff frequency, ωc, and attenuate those above it. The cutoff...
1.0K
Active Filters01:25

Active Filters

1.4K
Active filters are electronic circuits that use operational amplifiers (op-amps), resistors, and capacitors to filter out unwanted frequency components from a signal. A first-order low-pass active filter is designed to pass signals with a frequency lower than a certain cutoff frequency and attenuate frequencies higher than that cutoff frequency. The transfer function for a first-order low-pass active filter is:
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Enteral Nutrition I: Orogastric and Nasogastric Feeding01:26

Enteral Nutrition I: Orogastric and Nasogastric Feeding

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Enteral nutrition delivers nutrients directly to the stomach or small intestine through a tube. This method is appropriate for patients who cannot eat but still have a functioning digestive system. It is also beneficial for individuals with swallowing difficulties, anorexia, malabsorption, or those who have undergone gastrointestinal (GI) surgery.
Orogastric (OG) and nasogastric (NG) feeding are two standard methods used for enteral nutrition. Enteral nutrition is often preferred over...
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Enteral Nutrition II: Nasointestinal and Gastrostomy Feeding01:15

Enteral Nutrition II: Nasointestinal and Gastrostomy Feeding

1.1K
Enteral nutrition encompasses various methods of delivering nutrition directly to the gastrointestinal (GI) tract, bypassing traditional oral intake. It is particularly beneficial for patients who cannot eat by mouth but have a functioning digestive system. Key methods include nasointestinal feeding, gastrostomy, and jejunostomy, each suited to different clinical scenarios based on the patient's needs and condition.
Nasointestinal Feeding
Nasointestinal feeding involves placing a tube...
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The Soil Ecosystem02:23

The Soil Ecosystem

25.0K
Plants obtain inorganic minerals and water from the soil, which acts as a natural medium for land plants. The composition and quality of soil depend not only on the chemical constituents but also on the presence of living organisms. In general, soils contain three major components:
25.0K
Predator-Prey Interactions02:39

Predator-Prey Interactions

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Predators consume prey for energy. Predators that acquire prey and prey that avoid predation both increase their chances of survival and reproduction (i.e., fitness). Routine predator-prey interactions elicit mutual adaptations that improve predator offenses, such as claws, teeth, and speed, as well as prey defenses, including crypsis, aposematism, and mimicry. Thus, predator-prey interactions resemble an evolutionary arms race.
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Related Experiment Video

Updated: Feb 14, 2026

Sampling, Identification and Characterization of Microplastics Release from Polypropylene Baby Feeding Bottle during Daily Use
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Microplastics: No Small Problem for Filter-Feeding Megafauna.

Elitza S Germanov1, Andrea D Marshall2, Lars Bejder3

  • 1Faculty of Veterinary & Life Sciences, Murdoch University, Murdoch, Western Australia, Australia; Marine Megafauna Foundation, Truckee, CA, USA.

Trends in Ecology & Evolution
|February 10, 2018
PubMed
Summary

Microplastic pollution poses a threat to marine filter-feeders like mobulid rays, sharks, and whales. Further research is crucial to understand and address microplastic contamination in these vulnerable species.

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Last Updated: Feb 14, 2026

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Area of Science:

  • Marine Biology
  • Environmental Science
  • Ecotoxicology

Background:

  • Microplastic pollution is a pervasive global issue.
  • Filter-feeding marine megafauna are particularly vulnerable to microplastic ingestion.
  • Flagship species like mobulid rays, filter-feeding sharks, and baleen whales are indicators of ecosystem health.

Purpose of the Study:

  • To highlight the potential impact of microplastic contamination on filter-feeding marine megafauna.
  • To emphasize the need for further research into microplastic exposure and associated toxins in these species.
  • To underscore the importance of effective marine stewardship and communication.

Main Methods:

  • Review of emerging research on microplastic impacts.
  • Focus on case studies of mobulid rays, filter-feeding sharks, and baleen whales.
  • Analysis of potential exposure pathways and associated toxins.

Main Results:

  • Emerging research indicates potential microplastic exposure in key filter-feeding megafauna.
  • Plastic-associated toxins present a significant co-occurring risk.
  • Data gaps exist regarding the full extent of contamination and its effects.

Conclusions:

  • Microplastic pollution represents a significant threat to marine filter-feeding megafauna.
  • Urgent need for comprehensive research to quantify exposure and ecological impacts.
  • Enhanced communication and marine stewardship are vital for conservation efforts.