A series of C-8 mono-and disubstituted isatylidenes were prepared in order to examine the influence of the substituent on the polarization of the ethylenic carbons C-3 C-8. Donor-acceptor C-8 substitution resulted in an inversion of the polarization of the ethylenic carbons, as evidenced by the 13 C
Push-pull factors in mountain resorts
β Scribed by De-gen Wang
- Book ID
- 107505219
- Publisher
- SP Science Press
- Year
- 2004
- Tongue
- English
- Weight
- 728 KB
- Volume
- 14
- Category
- Article
- ISSN
- 1002-0063
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The minimum forces needed to manually push or pull a 4-wheel cart of differing weights with similar wheel sizes from a stationary state were measured on four floor materials under different conditions of wheel width, diameter, and orientation. Cart load was increased from 0 to 181.4 kg in increments