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Related Concept Videos

Standing Waves09:32

Standing Waves

51.9K
Source: Arianna Brown, Asantha Cooray, PhD, Department of Physics & Astronomy, School of Physical Sciences, University of California, Irvine, CA
Standing waves, or stationary waves, are waves that appear not to propagate and are produced by the interference of two waves traveling in opposite directions with the same frequency and amplitude. These waves appear to vibrate up and down with no linear movement and are most easily identified in vibrating finite media like a plucked...
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Standing Waves01:17

Standing Waves

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Sometimes waves do not seem to move; rather, they just vibrate in place. Unmoving waves can be seen on the surface of a glass of milk kept in a refrigerator, which is one example of standing waves. Vibrations from the refrigerator motor create waves on the milk that oscillate up and down but do not seem to move across the surface. These waves are formed or created by the superposition of two or more identical moving waves in opposite directions. The waves move through each other, with their...
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Anatomy of the Intestines01:23

Anatomy of the Intestines

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Although digestion of proteins, carbohydrates, and lipids may begin in the stomach, it is completed in the intestine. The absorption of nutrients, water, and electrolytes from food and drink also occurs in the intestine. The intestines can be divided into two structurally distinct organs—the small and large intestines.
Small Intestines
The small intestine is an ~7 meter-long tube with an inner diameter of just 2.5 cm. Since most nutrients are absorbed here, the inner lining of the...
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Standing Electromagnetic Waves01:15

Standing Electromagnetic Waves

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Electromagnetic waves can be reflected; the surface of a conductor or a dielectric can act as a reflector. As electric and magnetic fields obey the superposition principle, so do electromagnetic waves. The superposition of an incident wave and a reflected electromagnetic wave produces a standing wave analogous to the standing waves created on a stretched string.
Suppose a sheet of a perfect conductor is placed in the yz-plane, and a linearly polarized electromagnetic wave traveling in the...
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Standing Waves in a Cavity01:28

Standing Waves in a Cavity

1.4K
A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
1.4K
Modes of Standing Waves: II01:04

Modes of Standing Waves: II

1.6K
The starting point for expressing the modes of standing waves is understanding the boundary conditions that the waves must follow. The boundary conditions are derived from the physical understanding of how the standing waves are sustained, that is, how the vibrating particles of the medium behave at the boundaries imposed on them.
For a tube open at one end and closed at the other filled with air, the modes are such that there is always an antinode at the open end and a node at the closed end....
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Related Experiment Video

Updated: Jan 20, 2026

Standing/Stationary Waves and Simple Harmonics
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Standing/Stationary Waves and Simple Harmonics

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Intestinal and Multivisceral Transplantation: Where We Stand Today.

Mohamed Maklad1, Mohammed Osman1, Mariam Ismail2

  • 1Center for Gut Rehabilitation and Transplantation, Digestive Disease and Surgery Institute, Cleveland Clinic, Cleveland, Ohio, USA.

Pediatric Transplantation
|January 19, 2026
PubMed
Summary

Intestinal transplantation is a life-saving procedure for gut failure, with survival rates improving significantly. Advances in surgical techniques and immunosuppression are enhancing outcomes and nutritional autonomy for transplant recipients.

Keywords:
autologous gut reconstructioncomposite tissue transplantationintestinal failureintestinal transplantationmultivisceral transplantationpediatricserial transverse enteroplasty

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Area of Science:

  • Gastroenterology and Hepatology
  • Transplantation Surgery
  • Regenerative Medicine

Background:

  • Intestinal transplantation has evolved into a critical treatment for severe gut failure (GF).
  • Recent advancements in gut rehabilitation and the use of glucagon-like peptide-2 (GLP-2) have shifted the paradigm, reserving transplantation for rescue cases.
  • Despite challenges, ongoing improvements in transplant outcomes have been noted over the past decade.

Purpose of the Study:

  • To review the current status and recent advancements in intestinal and multivisceral transplantation.
  • To highlight improvements in patient and graft survival rates.
  • To discuss key developments and future directions in the field.

Main Methods:

  • Analysis of data from the 2025 International Intestinal Transplant Registry (IITR) report.
  • Review of contemporary cohorts reflecting advancements in surgical techniques and immunosuppression.
  • Examination of integrated composite tissue transplantation strategies.

Main Results:

  • The 2025 IITR report shows continued era-based improvements in transplant outcomes.
  • Five-year patient survival rates are 60% for pediatric and 52% for adult recipients; graft survival rates are 51% and 46%, respectively.
  • Over 90% of long-term survivors achieve full nutritional autonomy, with contemporary cohorts demonstrating substantially better results.

Conclusions:

  • Intestinal transplantation outcomes have significantly improved due to refined indications, advanced surgical techniques, and updated immunosuppressive protocols.
  • Composite tissue transplantation aids in addressing complex closure challenges.
  • Chronic rejection remains a significant barrier, necessitating future innovations in organ preservation, machine perfusion, and organoid transplantation.