Furthermore, through molecular structural design, we have also synthesized stable dual functional diphenylether polymer intermediates of ABB' types possessing ortho-dicarboxylic at one aromatic ring and diamine groups at another beginning from Xylenol and 1-Chloro-3,4-dinitrobenzene as the raw materials.

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In the period of aerodrome constmction project geology recottitaissance, high-resolution ortho-map of working area, 3D Remote Sensing Virtual Reality and animation o planned aerodromes are made with the technologies of Remote Scttstng digital image process, Virtual Reality and digital photogrammetry. By information extracting and comprehensively assessing on the geognosy, engineering geology, environment geology and eco-environment of work area, scientific foundation can be offered to deciders and workers of acrodrome.

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It is shown that mixed tolyl arsonic acid was much superior to either para- or ortho-isomer alone for cassiterite flotation.

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Mixing ratios between paraand ortho-tolyl arsonic acids ranging from 50:50 to 30:70 were effective with a peak value at 45:55 in which a maximum collecting capacity was obtained.

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Benzylidene[1,3-bis(2,6-dimethylphenyl)-4,5-dihydroimidazol-2-ylidene]dichloro(2-methylpyridine)ruthenium (62), benzylidene[1,3-bis(2,6-dimethylphenyl)-4,5-dihydroimidazol-2-ylidene] dichloro(2,4-dimethylpyridine)ruthen ium (63) introduce ortho substituted pyridine as dissociating ligand to weaken Ru-N bondand accelerate dissociation of pyridine derivative ligand through steric hindrance.

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It was observed that the optimum temperature for the fluorous biphasic regioselective nitrations of toluene, ethylbenzene, flurobenzene, chlorobenzene, bromobenzene, odobenzene and diphenyl ether were 80℃, 60℃, 60℃, 60℃, 80℃, 80℃ and 70℃ respectively. The catalyst had almost no activity when the reaction system contained 25% of water. Simultaneously, increasing the volume ratio of fluorous phase and organic phase in the system in which the fluorous phase can miscible with organic phase could decrease ortho-para ratio.

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After acid hydrolysis of urine, primary amino acids were derivatized with ortho-phthaldialdehyde and removed from the sample by use of silica gel, followed by devivatized of hydroxyproline with 9-fluorenylmethyl chloroformate, and then injected into a C8 reversed-phase column.

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Methods CBP 20 capillary column was used and the temperature was increased with a program to separate and determine 7 kinds of benzenes series,namely,benzene,toluene,ethylbenzene,p-xylenol,inter-xylenol,cinnamene and ortho-xylenol.

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The more the number of hydroxyl substitution in phenyl ring, the better the ability of scavenging DPPH free radical. That is, trihydroxy is better than dihydroxy, and dihydroxy is better than monohydroxy. Moreover, when the polyhydroxy exists in phenyl ring and it is ortho-position or para-position, the ability of scavenging DPPH free radical is better too.

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For a disubstituted complex, MA4B2, the planar arrangement gives three isomers, the familiar ortho, meta, and para arrangement s of organic chemistry.

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