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1. Due to the steric effect, there may be different toxicity mechanisms between long-chain and short-chain aliphatic alcohols.

2. Experiments showed that pre-coating with sulfur as a steric hindrance layer or wax as a hydrophobic film on urea surface could effectively prevent urea's dissolving in the coating process.

3. A rather more complex case is that of steric isomerism.

4. A multi - center fragmentation is governed by steric factors.

5. Severe steric effects at the reactive carbon would impede the substitution.

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6. In the end, the steric hindrance of the acetyl group was discussed.

7. A new steric anisotropic pair potential is studied based upon molecular field theory.

8. The size and steric hindrance of substituent of porphyrin is one of the crucial factors to affect the interaction between porphyrins and DNA.

9. Macromolecules cannot approach the ligand owing to steric hindrance of the matrix.

10. Nevertheless , steric hindrance caused by chemical structure reduces the retention time.

11. The results indicate that the larger steric hindrance in the amino alcohol unit of Schiff base ligands leads to higher enantioselectivity.

12. The stereoselectivity was improved by increasing steric hindrance of the reactions.

13. The binding of the enzyme-labeled drug to the antibody causes a steric alteration that results in decreased enzyme activity.

14. Their extraction ability markedly decreases with the increase of the steric hindrance from ester alkyl group.

15. The extraction behavior of dialkyl ( aryl ) Sulfides may be controlled by polar and steric substituents effects.

16. The results show that oxytocic activity was closely related to the hydrophobic, steric, and electronic properties in positions 3 and electronic property in position 8 of oxytocin analogues.

17. The dependence of chain scission and racemization on temperature results from molecular motion, "cage effect" and steric hindrance during recombination.

18. The action of the dispersants is to increase the repulsion interactions of electrical double layer, hydration shell and steric hindrance, and to decrease the Van der Waals attraction among particles.

19. At the same time, we have also investigated the influence of the electric effect and steric hindrance effect of the substituents to the yields and regioselectivity.

20. The dispersing ability of SSHE as cement dispersant also came from steric hindrance effect and long side chain contributed to steric hindrance in a certain degree.