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Related Concept Videos

Altruism01:03

Altruism

Altruistic behaviors are “unselfish” behaviors—those that help another individual at the expense of the individual carrying out the behavior. Despite the negative consequences for the altruistic animal, these behaviors are thought to have evolved for several reasons.
Renewal of Intestinal Stem Cells01:23

Renewal of Intestinal Stem Cells

The intestinal epithelial lining rapidly renews every 4 to 5 days. The renewal is facilitated by intestinal stem cells (ISCs) located at the base of the crypt– a gland located at the bottom of each villus. ISCs divide asymmetrically to form new stem cells and progenitor daughter cells. The daughter cells are called transit-amplifying (TA) cells which move upwards along the crypt and either differentiate into absorptive cells– the enterocytes or secretory cells– including the goblet,...
Community Based Intervention01:30

Community Based Intervention

Community-based interventions in mental health represent a paradigm shift from institution-centered care to treatments embedded within the fabric of local communities. By prioritizing inclusion and leveraging existing societal structures, this approach fosters a supportive environment conducive to addressing mental health challenges while promoting individual dignity and agency.
Foundations of Community Mental Health Programs
Central to the success of community-based interventions is the...
Renewal of Skin Epidermal Stem Cells01:12

Renewal of Skin Epidermal Stem Cells

The skin is divided into epidermis, dermis, and hypodermis, the skin's outermost, middle, and inner layers. The human epidermal layer regularly undergoes renewal, where old, dead cells are replaced by new cells. Epidermal stem cells or EpiSCs divide and differentiate to restore the lost cells. For the renewal process, some EpiSCs continuously self-renew. In contrast, few others differentiate into transit-amplifying cells, which later form prickle or spinous cells, followed by granular cells,...
Persuasion Strategies01:52

Persuasion Strategies

Researchers have tested many persuasion strategies, including the foot-in-the door and the door-in-the-face techniques, in a variety of contexts. Ultimately, the principles are effective in selling products and changing people’s attitude, ideas, and behaviors (Cialdini & Goldstein, 2004).
Unrenewable Cells00:50

Unrenewable Cells

In humans, the photoreceptor cells of the eye and sensory hair cells of the ear lack stem cells. These cells are thus unrenewable and cannot be replaced when they are damaged or destroyed.
Photoreceptors
The retina is composed of several layers and contains specialized cells called photoreceptors. The photoreceptors (rods and cones) change their membrane potential when stimulated by light energy. There are two types of photoreceptors—rods and cones—which differ in the shape of their outer...

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Related Experiment Video

Updated: Jun 16, 2026

Abbiategrasso Brain Bank Protocol for Collecting, Processing and Characterizing Aging Brains
12:28

Abbiategrasso Brain Bank Protocol for Collecting, Processing and Characterizing Aging Brains

Published on: June 3, 2020

Fostering repeat donations in Ghana.

S Owusu-Ofori1, K Asenso-Mensah, P Boateng

  • 1Transfusion Medicine Unit, Komfo Anokye Teaching Hospital, Kumasi, Ghana. sowusu_ofori@yahoo.com

Biologicals : Journal of the International Association of Biological Standardization
|January 23, 2010
PubMed
Summary

Repeat blood donation rates in Ghana varied significantly by donor group. School and radio-organized drives showed higher repeat donation success, highlighting effective recruitment strategies for voluntary blood donors.

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Published on: February 2, 2018

Area of Science:

  • Public Health
  • Hematology
  • Health Policy

Background:

  • African nations face challenges in voluntary blood donor recruitment and retention.
  • Complexities and costs hinder national blood policy implementation.
  • Reliance on replacement donors has not boosted voluntary donor initiatives.

Purpose of the Study:

  • To analyze activities for recruiting and retaining voluntary blood donors.
  • To evaluate donor records from mobile blood donation sessions between 2002 and 2008.

Main Methods:

  • Review of donor records from mobile blood donation sessions.
  • Analysis of voluntary blood donation activities and repeat donation trends.
  • Comparison of donation rates across different donor demographics and recruitment methods.

Main Results:

  • Over 71,000 donations collected, with 63.5% voluntary and 25% repeat donations.
  • School and college donors provided 60% of voluntary donations; radio drives increased contributions from 10% to 27%.
  • Muslim donor groups exceeded cost-effectiveness thresholds with 60% repeat donations, while Christian donors had lower rates.

Conclusions:

  • Repeat donation rates varied significantly among different blood donor groups in Kumasi, Ghana.
  • Community leaders play a crucial role in promoting altruistic blood donation.
  • Developing and assessing programs to convert replacement donors into repeat donors is recommended.