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Related Concept Videos

Secondary Active Transport01:55

Secondary Active Transport

137.8K
One example of how cells use the energy contained in electrochemical gradients is demonstrated by glucose transport into cells. The ion vital to this process is sodium (Na+), which is typically present in higher concentrations extracellularly than in the cytosol. Such a concentration difference is due, in part, to the action of an enzyme “pump” embedded in the cellular membrane that actively expels Na+ from a cell. Importantly, as this pump contributes to the high concentration of...
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Secondary Active Transport01:32

Secondary Active Transport

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One example of how cells use the energy contained in electrochemical gradients is demonstrated by glucose transport into cells. The ion vital to this process is sodium (Na+), which is typically present in higher concentrations extracellularly than in the cytosol. Such a concentration difference is due, in part, to the action of an enzyme "pump" embedded in the cellular membrane that actively expels Na+ from a cell. Importantly, as this pump contributes to the high concentration of...
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Primary Active Transport01:47

Primary Active Transport

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In contrast to passive transport, active transport involves a substance being moved through membranes in a direction against its concentration or electrochemical gradient. There are two types of active transport: primary active transport and secondary active transport. Primary active transport utilizes chemical energy from ATP to drive protein pumps that are embedded in the cell membrane. With energy from ATP, the pumps transport ions against their electrochemical gradients—a direction...
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Primary Active Transport01:29

Primary Active Transport

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In contrast to passive transport, active transport involves a substance being moved through membranes in a direction against its concentration or electrochemical gradient. There are two types of active transport: primary active transport and secondary active transport. Primary active transport utilizes chemical energy from ATP to drive protein pumps embedded in the cell membrane. With energy from ATP, the pumps transport ions against their electrochemical gradients—a direction they would...
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Active Transport01:14

Active Transport

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Active transport is a critical biological process that allows cells to move solutes against an electrochemical gradient. This process requires direct energy input and is characterized by its selectivity, saturability, and susceptibility to competitive inhibition.
Primary active transporters, like Na+, K+ and -ATPase, directly utilize ATP to move ions across the membrane. These transporters play significant roles in various physiological processes. For instance, Na+, K+ and -ATPase maintain...
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Protein Networks02:26

Protein Networks

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An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
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Modeling the Functional Network for Spatial Navigation in the Human Brain
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Network Model for Optimal Aircraft Location for Human Organ Transportation Activities.

F Paganelli1, L Mantecchini1, D Peritore2

  • 1Department of Civil, Chemical, Environmental, and Materials Engineering (DICAM), School of Engineering and Architecture, University of Bologna, Bologna, Italy.

Transplantation Proceedings
|January 19, 2019
PubMed
Summary
This summary is machine-generated.

This study optimized air transport for organ transplants in Italy, determining the best number and placement of aircraft. This ensures efficient, compliant, and timely organ delivery for successful transplant operations.

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Area of Science:

  • Logistics and Operations Research
  • Transportation Science
  • Healthcare Management

Background:

  • Efficient organ transport is critical for transplant success, requiring adherence to EU and national regulations.
  • Key performance indicators must align with economic, quantitative, and service-level parameters.
  • This research focused on optimizing aircraft numbers and locations within Italian airspace.

Purpose of the Study:

  • To determine the optimal number and geographical distribution of aircraft for organ transport in Italy.
  • To compare different service design scenarios and time intervals for air ambulance operations.
  • To ensure compliance with legal performance standards and nationwide service coverage.

Main Methods:

  • An integer linear programming model was developed to find optimal air transport solutions.
  • The model utilized data from June 2015 to May 2016 for extraregional organ transport.
  • Input data included aircraft utilization constraints and mission durations.

Main Results:

  • The model identified optimal aircraft numbers and locations based on mission duration, origin, and destination.
  • Results considered legal performance parameters, nationwide service needs, transplant volumes, and center locations.
  • The study determined the most efficient spatial and numerical allocation of air assets.

Conclusions:

  • Designing efficient, urgent-based services like organ transport is complex.
  • Continuous monitoring of the logistics chain and performance data is essential.
  • This approach provides valuable insights for maintaining a high-performing organ transport service.