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2. Butyl group - Wikipedia

   en.wikipedia.org/wiki/Butyl_group

   The effect of the tert-butyl group on the progress of a chemical reaction is called the Thorpe–Ingold effect illustrated in the Diels-Alder reaction below. Compared to a hydrogen substituent, the tert-butyl substituent accelerates the reaction rate by a factor of 240. [2] tert-Butyl effect. The tert-butyl effect is an example of steric hindrance.

3. Bed size - Wikipedia

   en.wikipedia.org/wiki/Bed_size

   Adjustable beds or electric adjustable bed sizes differ from the standard bed size. The length of these beds differ from a standard size due to the nature of the bed needing to bend. So they are 200 cm in length rather than 191 cm. King size and super king size are normally two 75 cm or two 90 cm adjacent beds. [25]

4. Descriptor (chemistry) - Wikipedia

   en.wikipedia.org/wiki/Descriptor_(Chemistry)

   The terms sec and tert are considered obsolete and should only be used for unsubstituted sec-butoxy, sec-butyl [26] [27] or tert-butyl groups. [ 28 ] [ 27 ] There are various spellings such as "sec-butyl", "s-butyl", "sBu" or "bus" which are also considered obsolete.

5. Bed (geology) - Wikipedia

   en.wikipedia.org/wiki/Bed_(geology)

   Cross-beds, or "sets," are not layered horizontally and are formed by a combination of local deposition on the inclined surfaces of ripples or dunes, and local erosion. Graded beds show a gradual change in grain or clast sizes from one side of the bed to the other. A normal grading occurs where there are larger grain sizes on the older side ...

6. A value - Wikipedia

   en.wikipedia.org/wiki/A_value

   For example, the tert-butyl group (A-value=4.9) has a larger A-value than the trimethylsilyl group (A-value=2.5), yet the tert-butyl group actually occupies less space. This difference can be attributed to the longer length of the carbon–silicon bond as compared to the carbon–carbon bond of the tert-butyl group.

7. Bed - Wikipedia

   en.wikipedia.org/wiki/Bed

   The space between the bed and the wall was called the ruelle, and very intimate friends were received there. The 14th century was also the time when feather beds became highly prized possessions. [18] Beds in aristocratic residences can be distinguished by enclosed curtains, these beds would have mattresses and pillows that were filled with ...

8. Talk:Bed size - Wikipedia

   en.wikipedia.org/wiki/Talk:Bed_size

   :-) Here in Israel there definitely are standard sizes for these, 4 standard sizes actually: a very small crib size (for babies up to 3 months old), a small baby bed (for babies up to, say, 2 years old, who still need to be "caged" in), a baby playpen (square mattress), and a child bed (for children around ages 3-5) which are smaller and ...

9. Bedding - Wikipedia

   en.wikipedia.org/wiki/Bedding

   Bedding, also called bedclothes [1] or bed linen, is the materials laid above the mattress of a bed for hygiene, warmth, protection of the mattress, and decorative effect. Bedding is the removable and washable portion of a human sleeping environment.