[PDF] Top 20 J. Braz. Chem. Soc. vol.8 número1
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J. Braz. Chem. Soc. vol.8 número1
... The Bra zil ian chem i cal in dus try has also grown, even though fac to ries have closed and many jobs have been lost. In spite of the prob lems, the cur rent shape and health of the in dus try are better now ... See full document
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J. Braz. Chem. Soc. vol.8 número1
... A se ries of pre lim i nary ex per i ments were car ried out in or der to char ac ter ize and con trol the in flu ence of sev eral ex per i men tal vari ables on the chem i cal sys tem. The in flu - ence of the re ... See full document
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J. Braz. Chem. Soc. vol.8 número1
... (0.9 mmole, 0.1141 g) in 35 mL of eth a nol. Af ter the ad di - tion of the ligand, an equal vol ume of deionized wa ter and a few drops of con cen trated am mo nia were added giv ing a green mix ture. Af ter 2 h ... See full document
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J. Braz. Chem. Soc. vol.8 número1
... tem. Vol umes of 300 µL for sam ples and 400 µL for the acid were in jected into the flow sys tem us ing a merg ing-zone ap proach 35 ...ple-injected vol ume was se lected based on the sen si tiv ity of the ... See full document
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J. Braz. Chem. Soc. vol.8 número1
... w e r e p r e pared i n a 0 . 0 5 m o l d m - 3 s o d i u m dihydrogenophosphate/phos pho ric acid so lu tion (pH = 3.0). Cal i bra tion curves were made daily with these so lu - tions. A 10 mmol dm -3 ox alic acid so lu ... See full document
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J. Braz. Chem. Soc. vol.8 número1
... The major constituent of the essential oil from each plant group was purified by column chromatography on silica gel, using hexane or hexane:diethyl ether (8:1) as a solvent for groups A and B respectively. The ... See full document
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J. Braz. Chem. Soc. vol.8 número1
... This was fully con firmed by the dis tinct val ues of the rate con stants re lated to the growth of the nu clei in the per pen dic u lar and par al lel di rec tions in re la tion to the[r] ... See full document
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J. Braz. Chem. Soc. vol.8 número1
... For some dimers in the se ries of mo - lec u lar com plexes stud ied here it has been found that, de spite ne glect ing the an gu lar de pend ence of the in ter ac - tion en ergy, the PD[r] ... See full document
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J. Braz. Chem. Soc. vol.8 número1
... The ox ide core pre sented re vers ible re dox prop er ties which were tuned by the choice of the or - ganic mod i fier. Par al lel vari a tions of the 183 W NMR chem i cal shifts were mea sured and both ef fects ... See full document
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J. Braz. Chem. Soc. vol.8 número1
... Dithiocarbamates (DTC) have been widely ap plied in sev eral in dus tries (e.g. rub ber), ag ri cul ture, med i cine, or - ganic syn the sis, and in an a lyt i cal chem is try (es pe cially in - or ganic spe cies ... See full document
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J. Braz. Chem. Soc. vol.8 número1
... acrylic cy lin dri cal ap pa ra tus con nected to the tube by a screw. On the base of this acrylic part two stain less steel screens, 50- and 300-mesh, and one 300-mesh pro pyl ene screen were at tached in se quence. ... See full document
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J. Braz. Chem. Soc. vol.8 número1
... The sorp tion and desorption of her bi cides ametryn, atrazine and metolachlor were stud ied in five Bra zil ian soils with var i ous or ganic mat ter con tents us ing high res o lu tion gas chro ma - tog ra phy (HRGC). ... See full document
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J. Braz. Chem. Soc. vol.8 número1
... shows many prop er ties that dif fer from the lat ter, for ex am - ple, chitosan is con sid ered more chem i cally ver sa tile than cel lu lose, due to the pres ence of an amino group. This group gives chitosan ... See full document
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J. Braz. Chem. Soc. vol.8 número1
... ketone 8 in al- most quan ti ta tive ...ketone 8 into the re quired enol ether 9 was con firmed by the vir tual dis ap pear ance of the car bonyl stretch ing at around 1715 cm -1 (in the in fra red spec ... See full document
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J. Braz. Chem. Soc. vol.8 número5
... of non-steroidal anti-inflammatory agents (NSAIS), and it is accepted that this is the basis of the anti-inflammatory action of these drugs 7 . The role of a second enzymatic pathway, namely 5-lipooxygenase (5-LO) in ... See full document
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J. Braz. Chem. Soc. vol.8 número4
... The re so nan ce li nes cor res pon ding to the wave lengths of gre a test sen si ti vity for the ca ti ons Cd(II), Cr(III), Cu(II) and Ni(II) were used... sents the fi nal con cen tra t[r] ... See full document
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J. Braz. Chem. Soc. vol.8 número6
... The electrical and semiconducting properties of thin anodic passive films potentiostatically formed (1 V ≤ E f ≤ 5 V vs. sce) on polycrystalline niobium electrodes in aqueous 0.5 mol/[r] ... See full document
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J. Braz. Chem. Soc. vol.8 número5
... Potentiometric equilibrium curve of Obisdien.6HBr in the presence of Mg(II), sulfate, selenite, and selenate ions under nitrogen is shown in Fig. 8. The shape of de curve is about the same as the one in presence ... See full document
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J. Braz. Chem. Soc. vol.8 número4
... As pre sen ted in Lloyd 7 and Vo-Dinh 8 , the synchro - nous-scan flu o res cen ce spec tra pre sent com bi ned pro per ti - es of both emis si on and ex ci ta ti on spec tra. This le ads to an in cre a se in se ... See full document
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J. Braz. Chem. Soc. vol.8 número3
... and poly(vinyl al co hol) were ad ded to the re ac ti on mix tu re, the stir ring spe ed was in cre a sed to 450 rpm, the tem pe ra tu - re was kept at 91 °C, the re ma i ning ini ti a tors (BPO and per - ben zo a te) ... See full document
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