英文字典中文字典Word104.com



中文字典辭典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z   







請輸入英文單字，中文詞皆可：

boron    音標拼音: [b'ɔr,ɑn]
n. 硼

硼

boron
n 1: a trivalent metalloid element; occurs both in a hard black
crystal and in the form of a yellow or brown powder [synonym:
{boron}, {B}, {atomic number 5}]

Boron \Bo"ron\ (b[=o]"r[o^]n), n. [See {Borax}.] (Chem.)
A nonmetallic element occurring abundantly in borax. It is
reduced with difficulty to the free state, when it can be
obtained in several different forms; viz., as a substance of
a deep olive color, in a semimetallic form, and in colorless
quadratic crystals similar to the diamond in hardness and
other properties. It occurs in nature also in boracite,
datolite, tourmaline, and some other minerals. Atomic number
5. Atomic weight 10.81. Symbol B.
[1913 Webster]

boron
Symbol: B
Atomic number: 5
Atomic weight: 10.811
An element of group 13 of the periodic table. There are two allotropes,
amorphous boron is a brown power, but metallic boron is black. The
metallic form is hard (9.3 on Mohs' scale) and a bad conductor in room
temperatures. It is never found free in nature. Boron-10 is used in
nuclear reactor control rods and shields. It was discovered in 1808 by
Sir
Humphry Davy and by J.L. Gay-Lussac and L.J. Thenard.

請選擇你想看的字典辭典：
單詞字典翻譯
Boron查看　Boron　在Google字典中的解釋Google英翻中〔查看〕
Boron查看　Boron　在Yahoo字典中的解釋Yahoo英翻中〔查看〕

安裝中文字典英文字典查詢工具!


中文字典英文字典工具:
選擇顏色:
輸入中英文單字

































































英文字典中文字典相關資料:
  • Boron - Wikipedia
    Boron is a chemical element; it has symbol B and atomic number 5 In its crystalline form it is a brittle, dark, lustrous metalloid; in its amorphous form it is a brown powder
  • Boron - Uses, Side Effects, and More - WebMD
    Learn more about Boron uses, effectiveness, possible side effects, interactions, dosage, user ratings and products that contain Boron
  • 13 Surprising Benefits of Boron - Organic Facts
    Boron is a biological trace mineral that has been studied for its many health benefits if consumed in the daily diet Health conditions such as arthritis and osteoporosis can be managed with medications prescribed by a doctor but more importantly with a diet that includes boron
  • Boron | Properties, Uses, Facts | Britannica
    boron (B), chemical element, semimetal of main Group 13 (IIIa, or boron group) of the periodic table, essential to plant growth and of wide industrial application
  • What Does Boron Do for the Body? Benefits and Health Risks
    Boron is a trace mineral that affects the body in many ways Learn the health benefits and health risks of taking boron daily
  • Boron Facts, Symbol, Discovery, Properties, Common Uses
    Boron supplements are used as medicines to treat painful menstruation, osteoarthritis and rheumatoid arthritis, depression, building strong muscles and bones, increasing sex hormone testosterone levels It benefits the body by increasing estrogen levels in post-menopausal women and healthy men
  • Boron - Health Professional Fact Sheet - Office of Dietary Supplements
    Boron is a trace element that is naturally present in many foods and available as a dietary supplement It is a structural component of plant cell walls and is required for plant growth, pollination, and seed formation [1]
  • 5 Powerful Boron Benefits - Dr. Berg
    Boron is a trace mineral obtained primarily through the consumption of plant foods Though only small amounts are needed, maintaining adequate boron levels has been linked to essential biological processes that support overall health and wellness
  • Boron Uses, Benefits, Dosage, Side Effects and Interactions - Dr. Axe
    Boron uses include the ability to help keep the skeletal structure strong by adding to bone density, preventing osteoporosis, treating conditions like arthritis, and improving strength and muscle mass





中文字典-英文字典  2005-2009

|中文姓名英譯,姓名翻譯 |简体中文英文字典