1. PCB (polychlorinated biphenyl):Any of a class of highly stable organic compounds prepared by the reaction of chlorine with biphenyl, a two-ring compound.

2. In this paper, the methylation of biphenyl to 4-methylbiphenyl (4-MBP) over the zeolite catalysts was studied.

3. Cata condensed, peri condensed and biphenyl type aromatic unit structures coexist in resins subfractions and pentane asphaltenes, while the proportion of biphenyl type structure is relatively small.

4. In this thesis, a type of biphenyl rod-like liquid crystals and two types of triphenylene discotic liquid crystals were synthesized.

5. Application and synthetic method of biphenyl and its derivatives int he fields of medicine, liquid crystal and fine chemical engineering are described.

6. The biphenyl and phenanthrene in coal tar wastewater are first concentrated by extraction with benzene and then determined by gas chromatography with thin layer column.

7. We adopted biphenyl as a core, dendrimers containing with 1, 2, 5, and 10 carbazole groups as dendrons have been successfully synthesized.

8. Then they can be further recrystallized to biphenyl with a purity of over 99.9 %.

9. The development of shape - selective alkylation of biphenyl to 4,4' - dialkylbiphenyl over zeolite catalysts is reviewed.

10. Four unsymmetrical biphenyl derivatives were synthesized with good yields by the tetrakis(triphenylphosphine) palladium (0) catalysed cross-coupling reaction of arylboronic acid with bromobenzene.

11. The naturally occurring biphenyl and diphenyl ether-type diarylheptanoids were reviewed with report to the distribution, type of structure, biogenetic pathway and pharmacological activity.

12. The electropolymerization of biphenyl at overcharged positive electrode was investigated for overcharge protection of Li_ion batteries.

13. The documentary Warning from the Wild-the Price of Salmon looked at levels of polychlorinated biphenyls and dioxins in farmed salmon.

14. It summarizes the technology of synthesis and post treatment, using paraformaldehyde and biphenyl as raw material, zinc chloride to catalyzer, through chloromethylation.

15. The yield of myrtenol (II) is a little improved by electron-transfer photooxygenation with dicyanoanthracene (DCA), but is almost double by the addition of biphenyl as cosensitizer.

16. Discusses us by the electrochemistry to know that, the molecular structure (dihedral angle of biphenyl group) have the very heavy influence to the electrochemistry .

17. Effects of polymer structure on light-emitting properties were investigated by using different copolymerizing units, such as biphenyl and fluorene .

18. The main transformation projects and technical characteristics were introduced from drying equipments, spinning manifold and pack, winder and biphenyl heating system.

19. A study of doubly charged ion mass spectra (2E spectra), the substituents effect and the target gas pressure deppendence of biphenyl derivitives was presented in this work.

20. A kind of novel mesomorphic monomer 4 - benzyloxyl biphenyl methacrylate and its homopolymer were synthesized with 4 - hydroxy - 4' - benzyloxyl biphenyl as reactant.

21. Based on the liquid crystalline polymer theory,[Sentencedict.com] a kind of polyacrylate was synthesized by choosing biphenyl group as rigid nucleus of mesogenic unit and hexylidene as flexible spacing group.

22. In presence of catalyst AICI_3, the complete bromination of biphenyl in excess bromine can be achieved easily, and the yield of 98% is obtained.

23. Solvent effects illustrated that the interaction between the solvents and the biphenyl groups strengthened with increasing the polarity of the solvents.

24. Methods A new synthesis route for felbinac preparation was studied with biphenyl under ultrasound.

25. They are generally part of the nitrogen-containing heterocyclic ring and the biphenyl components, the former is much more varied, while the latter is relatively stable.