Danh sách bài viết của Nguyễn Mỹ Hương

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Bài viết của Nguyễn Mỹ Hương

Energy in Electromagnetic Waves

Anyone who has used a microwave oven knows there is energy in electromagnetic waves . Sometimes this energy is obvious, such as in the warmth of the summer sun. Other times it is subtle, such as the unfelt energy of gamma rays, which can destroy living ...

Tác giả: Nguyễn Mỹ Hương viết 15:17 ngày 25/05/2018 chỉnh sửa

Diseases Associated with Depressed or Overactive Immune Responses

This section is about how the immune system goes wrong. When it goes haywire, and becomes too weak or too strong, it leads to a state of disease. The factors that maintain immunological homeostasis are complex and incompletely understood. As you have seen, ...

Tác giả: Nguyễn Mỹ Hương viết 15:17 ngày 25/05/2018 chỉnh sửa

Signaling in Single-Celled Organisms

Within-cell signaling allows bacteria to respond to environmental cues, such as nutrient levels, some single-celled organisms also release molecules to signal to each other. Yeasts are eukaryotes (fungi), and the components and processes found in yeast ...

Tác giả: Nguyễn Mỹ Hương viết 15:16 ngày 25/05/2018 chỉnh sửa

Seed Plants: Gymnosperms

The first plants to colonize land were most likely closely related to modern-day mosses (bryophytes) and are thought to have appeared about 500 million years ago. They were followed by liverworts (also bryophytes) and primitive vascular plants, the pterophytes, ...

Tác giả: Nguyễn Mỹ Hương viết 15:16 ngày 25/05/2018 chỉnh sửa

Introduction to Work and the Economy

Today, the jobs of these assembly-line workers are increasingly being eliminated as technology grows. (Photo courtesy of John Lloyd/flickr) Ever since the first people traded one item for another, there has been some ...

Tác giả: Nguyễn Mỹ Hương viết 15:16 ngày 25/05/2018 chỉnh sửa

The Science of Biology

Formerly called blue-green algae, these (a) cyanobacteria, shown here at 300x magnification under a light microscope, are some of Earth’s oldest life forms. These (b) stromatolites along the shores of Lake Thetis in Western Australia are ...

Tác giả: Nguyễn Mỹ Hương viết 15:16 ngày 25/05/2018 chỉnh sửa

Mollusks and Annelids

The mollusks are a diverse group (85,000 described species) of mostly marine species. They have a variety of forms, ranging from large predatory squid and octopus, some of which show a high degree of intelligence, to small grazing forms with elaborately ...

Tác giả: Nguyễn Mỹ Hương viết 15:16 ngày 25/05/2018 chỉnh sửa

The Action Potential

The functions of the nervous system—sensation, integration, and response—depend on the functions of the neurons underlying these pathways. To understand how neurons are able to communicate, it is necessary to describe the role of an excitable membrane in ...

Tác giả: Nguyễn Mỹ Hương viết 15:16 ngày 25/05/2018 chỉnh sửa

Dark Matter and Closure

One of the most exciting problems in physics today is the fact that there is far more matter in the universe than we can see. The motion of stars in galaxies and the motion of galaxies in clusters imply that there is about 10 times as much mass as in ...

Tác giả: Nguyễn Mỹ Hương viết 15:15 ngày 25/05/2018 chỉnh sửa

Group Size and Structure

Cadets illustrate how strongly conformity can define groups. (Photo courtesy David Spender/flickr) A small group is typically one where the collection of people is small enough that all members of the group know each other ...

Tác giả: Nguyễn Mỹ Hương viết 15:15 ngày 25/05/2018 chỉnh sửa

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Energy in Electromagnetic Waves

Diseases Associated with Depressed or Overactive Immune Responses

Signaling in Single-Celled Organisms

Seed Plants: Gymnosperms

Introduction to Work and the Economy

The Science of Biology

Mollusks and Annelids

The Action Potential

Dark Matter and Closure

Group Size and Structure

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