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Cell Culture

Cell Culture

Most vertebrate cells grow in vitro attached to a substrate as a monolayer, called adherent cultures. The flasks and plates used to grow cells are chemically treated to facilitate cell attachment. However, a few cell types, such as hematopoietic cells, can grow in a suspension. In contrast to adherent cultures, suspension cultures can grow in non-treated cultureware using magnetic stirrers or spinner flasks to agitate the culture media

Cell Lines

Cell Lines

A cell line is a population of cells grown in vitro that can be subcultured over several generations. Normal cells cease to divide after a certain number of cell divisions, a process known as replicative senescence. This number, called the Hayflick limit, was conceptualized by Leonard Hayflick in 1961 when he observed that fetal cells grown in culture could only divide 40-60 times. This limit is due to the shortening of the telomeres during each round of cell division, preventing cell division...

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[Cheng Lin and his life].

H M Yin, Y Q Li

Zhonghua Yi Shi Za Zhi (Beijing, China : 1980)

|January 10, 2023

Summary

This article highlights Cheng Lin, a renowned physician from the late Ming and early Qing Dynasties, celebrated for his significant medical contributions and extensive writings. His family legacy includes generations of notable physicians.

Area of Science:

Medical History
Biography

Context:

Biographical details of Cheng Lin, a prominent physician of the late Ming and early Qing Dynasties.
Historical context of traditional Chinese medicine during this era.

Purpose:

To document the life, medical achievements, and scholarly contributions of Cheng Lin.
To trace the lineage of Cheng Lin's family and their enduring impact on medicine.

Summary:

Cheng Lin, born before 1616 and died after 1700, studied medicine under Cheng Jingtong and Yu Chang.
He authored significant medical texts including Yi Xia Zhi Yan and Jin Gui Yao Lue Zhi Jie.
His family, the Cheng's, produced numerous famous doctors, maintaining a medical tradition to the present day.

Impact:

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Preserves the legacy of a key figure in Chinese medical history.
Highlights the importance of familial traditions in the transmission of medical knowledge.
Provides insights into the social and intellectual networks of physicians during the late Ming and early Qing Dynasties.