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Selenium is a
chemical element; it has the
symbol Se and
atomic number 34. It has
various physical appearances,
including a brick-red powder, a vitreous...
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Selenium is an open
source umbrella project for a
range of
tools and
libraries aimed at
supporting browser automation. It
provides a
playback tool for...
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Selenium (34Se) has six
natural isotopes that
occur in
significant quantities,
along with the
trace isotope 79Se,
which occurs in
minute quantities in...
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Selenium disulfide, also
known as
selenium sulfide, is a
chemical compound and
medication used to
treat seborrheic dermatitis, dandruff, and pityriasis...
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Selenium sulfide can
refer to
either of the following:
Selenium disulfide, SeS2
Selenium hexasulfide, Se2S6 This set
index article lists chemical compounds...
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Selenium is an
essential micronutrient for animals,
though it is
toxic in
large doses. In plants, it
sometimes occurs in
toxic amounts as forage, e.g....
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range of
shades visible in a
print without reducing the contrast.
Selenium toning is
especially effective in this regard. Some
toning processes can...
- A
selenium rectifier is a type of
metal rectifier,
invented in 1933. They were used in
power supplies for
electronic equipment and in high-current battery-charger...
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Selenium deficiency occurs when an
organism lacks the
required levels of
selenium, a
critical nutrient in many species. Deficiency,
although relatively...
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oxygen family.
Group 16
consists of the
elements oxygen (O),
sulfur (S),
selenium (Se),
tellurium (Te), and the
radioactive elements polonium (Po) and livermorium...
