1,720,976 research outputs found
Determination Of Anions, Cations, And Sugars In Coconut Water By Capillary Electrophoresis
No full textThis work presents the determination of several analytes in coconut water by using capillary electrophoresis with contactless conductivity detection (CCD). It was analyzed 5 different samples: two unprocessed (natural) coconut water and three processed (commercial) ones. The samples were injected without pretreatment and only a simple dilution was necessary. The technique was applied to quantify 12 analytes: chloride, sulfate, phosphate, malate, ascorbate, potassium, sodium, calcium, magnesium, fructose, glucose, and sucrose with limit of detection (LOD) of 0.09, 0.12, 0.50, 0.97, 1.2, 0.05, 0.17, 0.12, 0.08, 5.4, 7.4, and 8.9 mg L-1, respectively. These analysis were done utilizing four different running buffers. ©2005 Sociedade Brasileira de Química.166 A11341139Banzon, J.A., (1977) Philippine J. Coconut Studies, 2, p. 13Seow, C.C., Gwee, C.N., (1997) Int. J. Food Sci. Tecnol., 32, p. 189Aragão, W.M., A Importância Do Coqueiro-Anão Verde, , http://www.embrapa.brSantoso, U., Kubo, K., Ota, T., Tadokoro, T., Mackawa, A., (1996) Food Chem., 7, p. 299Aleixo, P.C., Nóbrega, J.A., Santos, D., Muller, P.C.S., (2000) Quim. Nova, 23, p. 310Dey, G., Sachan, A., Ghosh, S., Mitra, A., (2003) Ind. Crops Prod., 18, p. 171Leong, L.P., Shui, G., (2002) Food Chem., 76, p. 69Wagner, K.-H., Derkits, S., Herr, M., Schuh, H., Elmadfa, I., (2002) Food Chem., 78, p. 375Andrade, E.R., Amorim, C.A., Matos, M.H.T., Rodrigues, A.P.R., Silva, J.R.V., Dode, M.A.N., Figueiredo, J.R., (2002) Small Ruminant Res., 43, p. 235Jackson, J.C., Gordon, A., Wizzard, G., McCook, K., Rolle, R., (2004) J. Sci. Food Agric., 84, p. 1049Petroianu, G.A., Kosanovic, M., Shehatta, I.S., Mahgoub, B., Saleh, A., Maleck, W.H., (2004) J. Trace Element. Exp. Med., 17, p. 273Khan, M.N., Muti-Ur-Rehman, Khan, K.W., (2003) Pakistan J. Botany, 35, p. 925Brito, N.M., Navickiene, S., Polese, L., Jardim, E.F.G., Abakerli, R.B., Ribeiro, M.L., (2002) J. Chromatogr. A, 957, p. 201Ge, L.Y., Yong, J.W.H., Tan, S.N., Yang, X.H., Ong, E.S., (2004) J. Chromatogr. A, 1048, p. 119Da Silva, J.A.F., Guzman, N., Do Lago, C.L., (2002) J. Chromatogr. A, 942, p. 249Da Silva, J.A.F., Do Lago, C.L., (1998) Anal. Chem., 70, p. 4339Rocha, F.R., Da Silva, J.A.F., Do Lago, C.L., Fornaro, A., Gutz, I.G.R., (2003) Atmos. Environ., 37, p. 105Da Silva, J.A.F., Ricelli, N.L., Carvalho, A.Z., Do Lago, C.L., (2003) J. Braz. Chem. Soc., 14, p. 265Munoz, R.A.A., Richter, E.M., De Jesus, D.P., Do Lago, C.L., Angnes, L., (2004) J. Braz. Chem. Soc., 15, p. 523Carvalho, A.Z., Da Silva, J.A.F., Do Lago, C.L., (2003) Electrophoresis, 24, p. 213
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Toner And Paper-based Fabrication Techniques For Microfluidic Applications
No full textThe interest in low-cost microfluidic platforms as well as emerging microfabrication techniques has increased considerably over the last years. Toner- and paper-based techniques have appeared as two of the most promising platforms for the production of disposable devices for on-chip applications. This review focuses on recent advances in the fabrication techniques and in the analytical/bioanalytical applications of toner and paperbased devices. The discussion is divided in two parts dealing with (i) toner and (ii) paper devices. Examples of miniaturized devices fabricated by using direct-printing or toner transfer masking in polyester-toner, glass, PDMS as well as conductive platforms as recordable compact disks and printed circuit board are presented. The construction and the use of paper-based devices for off-site diagnosis and bioassays are also described to cover this emerging platform for low-cost diagnostics. © 2010 Wiley-VCH Verlag GmbH & Co. KGaA.311524872498Manz, A., Graber, N., Widmer, H.M., (1990) Sens. Actuat. B, 1, pp. 244-248Reyes, D.R., Iossifidis, D., Auroux, P.A., Manz, A., (2002) Anal. Chem., 74, pp. 2623-2636Auroux, P.A., Iossifidis, D., Reyes, D.R., Manz, A., (2002) Anal. Chem., 74, pp. 2637-2652Vilkner, T., Janasek, D., Manz, A., (2004) Anal. Chem., 76, pp. 3373-3385Dittrich, P.S., Tachikawa, K., Manz, A., (2006) Anal. Chem., 78, pp. 3887-3907West, J., Becker, M., Tombrink, S., Manz, A., (2008) Anal. Chem., 80, pp. 4403-4419Dolnik, V., Liu, S.R., Jovanovich, S., (2000) Electrophoresis, 21, pp. 41-54Castano-Alvarez, M., Ayuso, D.F.P., Granda, M.G., Fernandez-Abedul, M.T., Garcia, J.R., Costa-Garcia, A., (2008) Sens. Actuat. B., 130, pp. 436-448Coltro, W.K.T., Carrilho, E., (2007) Handbook of Capillary and Microchip Electrophoresis and Associated Microtechniques, pp. 1169-1184. , Landers, J. P. (Ed.), 3rd Edn, CRC Press, New YorkFiorini, G.S., Chiu, D.T., (2005) Biotechniques, 38, pp. 429-446Duffy, D.C., McDonald, J.C., Schueller, O.J.A., Whitesides, G.M., (1998) Anal. Chem., 70, pp. 4974-4984Becker, H., Gartner, C., (2000) Electrophoresis, 21, pp. 12-26Becker, H., Gartner, C., (2008) Anal. Bioanal. Chem., 390, pp. 89-111Martinez, A.W., Phillips, S.T., Butte, M.J., Whitesides, G.M., (2007) Angew. Chem. Int. Ed., 46, pp. 1318-1320Martinez, A.W., Phillips, S.T., Carrilho, E., Thomas III, S.W., Sindi, H., Whitesides, G.M., (2008) Anal. Chem., 80, pp. 3699-3707Martinez, A.W., Phillips, S.T., Whitesides, G.M., Carrilho, E., (2010) Anal. Chem., 82, pp. 3-10Tan, A., Rodgers, K., Murrihy, J.P., O'Mathuna, C., Glennon, J.D., (2001) Lab Chip, 1, pp. 7-9Do Lago, C.L., Silva, H.D.T., Neves, C.A., Brito-Neto, J.G.A., Da Silva, J.A.F., (2003) Anal. Chem., 75, pp. 3853-3858Coltro, W.K.T., Lunte, S.M., Carrilho, E., (2008) Electrophoresis, 29, pp. 4928-4937He, F.Y., Liu, A.L., Yuan, J.H., Coltro, W.K.T., Carrilho, E., Xia, X.H., (2005) Anal. Bioanal. Chem., 382, pp. 192-197Coltro, W.K.T., Da Silva, J.A.F., Silva, H.D.T., Richter, E.M., Furlan, R., Angnes, L., Do Lago, C.L., Carrilho, E., (2004) Electrophoresis, 25, pp. 3832-3839Liu, A.L., He, F.Y., Hu, Y.L., Xia, X.H., (2006) Talanta, 68, pp. 1303-1308Yu, H., He, F.Y., Lu, Y., Hu, Y.L., Zhong, H.Z., Xia, X.H., (2008) Talanta, 75, pp. 43-48Lu, Y., Hu, Y.L., Xia, X.H., (2009) Talanta, 79, pp. 1270-1275Coltro, W.K.T., Da Silva, J.A.F., Carrilho, E., (2008) Electrophoresis, 29, pp. 2260-2265Liu, A.L., He, F.Y., Wang, K., Zhou, T., Lu, Y., Xia, X.H., (2005) Lab Chip, 5, pp. 974-978Liu, A.L., Zhou, T., He, F.Y., Xu, J.J., Lu, Y., Chen, H.Y., Xia, X.H., (2006) Lab Chip, 6, pp. 811-818Yu, H., Lu, L., Zhou, Y.G., Wang, F.B., He, F.Y., Xia, X.H., (2008) Lab Chip, 8, pp. 1496-1501Do Lago, C.L., Neves, C.A., De Jesus, D.P., Silva, H.D.T., Brito-Neto, J.G.A., Da Silva, J.A.F., (2004) Electrophoresis, 25, pp. 3825-3831De Jesus, D.P., Blanes, L., Do Lago, C.L., (2006) Electrophoresis, 27, pp. 4935-4942Coltro, W.K.T., Piccin, E., Da Silva, J.A.F., Do Lago, C.L., Carrilho, E., (2007) Lab Chip, 7, pp. 931-934Branham, M.L., Tay, R.T.S., Schoonover, C., Davis, P.S., Allen, S.D., Shyy, W., (2002) J. Mater. Res., 17, pp. 1559-1562Bao, N., Zhang, Q., Xu, J.J., Chen, H.Y., (2005) J. Chromatogr. A, 1089, pp. 270-275Vullev, V.I., Wan, J., Heinrich, V., Landsman, P., Bower, P.E., Xia, B., Millare, B., Jones, G., (2006) J. Am. Chem. Soc., 128, pp. 16062-16072Hong, C., Bao, D., Thomas, M.S., Clift, J.M., Vullev, V.I., (2008) Langmuir, 24, pp. 8439-8442Thomas, M.S., Millare, B., Clift, J.M., Bao, D., Hong, C., Vullev, V.I., (2010) Ann. Biomed. Eng., 38, pp. 21-32Abdelgawad, M., Watson, M.W.L., Young, E.W.K., Mudrik, J.M., Ungrin, M.D., Wheeler, A.R., (2008) Lab Chip, 8, pp. 1379-1385Easley, C.J., Benninger, R.K.P., Shaver, J.H., Head, W.S., Piston, D.W., (2009) Lab Chip, 9, pp. 1119-1127Wang, C., Li, S.J., Wu, Z.Q., Xu, J.J., Chen, H.Y., Xia, X.H., (2010) Lab Chip, 10, pp. 639-646McDonald, J.C., Chabinyc, M.L., Metallo, S.J., Anderson, J.R., Stroock, A.D., Whitesides, G.M., (2002) Anal. Chem., 74, pp. 1537-1545Kaigala, G.V., Ho, S., Penterman, R., Backhouse, C.J., (2007) Lab Chip, 7, pp. 384-387Grimes, A., Brealauer, D.N., Long, M., Pegan, J., Lee, L.P., Hine, M., (2008) Lab Chip, 8, pp. 170-172Yuen, P.K., Goral, V.N., (2010) Lab Chip, 10, pp. 384-387Daniel, D., Gutz, I.G.R., (2003) Electrochem. Commun., 5, pp. 782-786Angnes, L., Richter, E.M., Augelli, M.A., Kume, G.H., (2000) Anal. Chem., 72, pp. 5503-5506Richter, E.M., De Jesus, D.P., Neves, C.A., Lago, C.L., Angnes, L., (2003) Quim. Nova, 26, pp. 839-843Richter, E.M., Da Silva, J.A.F., Gutz, I.G.R., Do Lago, C.L., Angnes, L., (2004) Electrophoresis, 25, pp. 2965-2969Lowinsohn, D., Richter, E.M., Angnes, L., Bertotti, M., (2006) Electroanalysis, 18, pp. 89-94Daniel, D., Gutz, I.G.R., (2005) Talanta, 68, pp. 429-436Daniel, D., Gutz, I.G.R., (2007) Electrochem. Commun., 9, pp. 522-528Ferreira, H.E.A., Daniel, D., Bertotti, M., Richter, E.M., (2008) J. Braz. Chem. Soc., 19, pp. 1538-1545Silva, R.A.B., Almeida, E.G.N., Rabelo, A.C., Silva, A.T.C., Ferreira, H.E.A., Richter, E.M., (2009) J. Braz. Chem. Soc., 20, pp. 1235-1241Ferreira, T.L., Paixao, T.R.L.C., Richter, E.M., El Seoud, O.A., Bertotti, M., (2007) J. Phys. Chem. B, 111, pp. 12478-12484Paixao, T.R.L.C., Richter, E.M., Brito-Neto, J.G.A., Bertotti, M., (2006) J. Electroanal. Chem., 596, pp. 101-108Paixao, T.R.L.C., Richter, E.M., Brito-Neto, J.G.A., Bertotti, M., (2006) Electrochem. Commun., 8, pp. 9-14Daniel, D., Gutz, I.G.R., (2006) Anal. Chim. Acta, 571, pp. 218-227Abdelgawad, M., Wheeler, A.R., (2007) Adv. Mater., 19, pp. 133-137Abdelgawad, M., Wheeler, A.R., (2008) Microfluid. Nanofluid., 4, pp. 349-355Vázquez, M., Frankenfeld, C., Coltro, W.K.T., Carrilho, E., Diamond, D., Lunte, S.M., (2010) Analyst, 135, pp. 96-103Clegg, D.L., (1950) Anal. Chem., 22, pp. 48-59Dickinson, D., Harris, F.J.T., (1950) Analyst, 75, pp. 687-688Qureshi, S.Z., Ahmad, S.T., Haque, S., (1990) Talanta, 37, pp. 763-765Comer, J.P., (1956) Anal. Chem., 28, pp. 1748-1750Rorem, E.S., Lewis, J.C., (1962) Anal. Biochem., 3, pp. 230-235Martinez, A.W., Phillips, S.T., Whitesides, G.M., (2008) Proc. Natl. Acad. Sci. USA, 105, pp. 19606-19611Bruzewicz, D.A., Reches, M., Whitesides, G.M., (2008) Anal. Chem., 80, pp. 3387-3392Martinez, A.W., Phillips, S.T., Wiley, B.J., Gupta, M., Whitesides, G.M., (2008) Lab Chip, 8, pp. 2146-2150Li, X., Tian, J., Nguyen, T., Shen, W., (2008) Anal. Chem., 80, pp. 9131-9134Fenton, E.M., Mascarenas, M.R., López, G.P., Sibbett, S.S., (2009) Appl. Mater. Interface, 1, pp. 124-129Mendez, S., Fenton, E.M., Gallegos, G.R., Petsev, D.N., Sibbettt, S.S., Stone, H.A., Zhang, Y., López, G.P., (2010) Langmuir, 26, pp. 1380-1385Lu, Y., Shi, W., Jiang, L., Qin, J., Lin, B., (2009) Electrophoresis, 30, pp. 1497-1500Carrilho, E., Martinez, A.W., Whitesides, G.M., (2009) Anal. Chem., 81, pp. 7091-7095Lu, Y., Shi, W., Qin, J., Lin, B., (2010) Anal. Chem., 82, pp. 329-335Zhao, W., Ali, M.M., Aguirre, S.D., Brook, M.A., Li, Y., (2008) Anal. Chem., 80, pp. 8431-8437Li, X., Tian, J., Shen, W., (2010) Anal. Bioanal. Chem., 396, pp. 495-501Ellerbee, A.K., Phillips, S.T., Siegel, A.C., Mirica, K.A., Martinez, A.W., Striehl, P., Jain, N., Whitesides, G.M., (2009) Anal. Chem., 81, pp. 8447-8452Vykoukal, D.M., Stone, G.P., Gascoyne, P.R.C., Alt, E.U., Vykoukal, J., (2009) Angew. Chem. Int. Ed., 48, pp. 7649-7654Carrilho, E., Phillips, S.T., Vella, S.J., Martinez, A.W., Whitesides, G.M., (2009) Anal. Chem., 81, pp. 5990-5998Cheng, H.D., Jiang, X.H., Sun, Y., Wang, J., (2001) Pattern Recogn., 34, pp. 2259-2281Cantrell, K., Erenas, M.M., Orbe-Payá, I., Ocapitán-Vallvey, L.F., (2010) Anal. Chem., 82, pp. 531-542Dungchai, W., Chailapakul, O., Henry, C.S., (2009) Anal. Chem., 81, pp. 5821-5826Carvalhal, R.F., Kfouri, M.S., Piazzeta, M.H.O., Gobbi, A.L., Kubota, L.T., (2010) Anal. Chem., 82, pp. 1162-1165Nie, Z., Nijhuis, C.A., Gong, J., Chen, X., Kumachev, A., Martinez, A.W., Narovlyansky, M., Whitesides, G.M., (2010) Lab Chip, 10, pp. 477-483Wang, H., Liu, J., Cooks, R.G., Ouyang, Z., (2010) Angew. Chem. Int. Ed., 49, pp. 877-880Gao, L., Sugiarto, A., Harper, J.D., Cooks, R.G., Ouyang, Z., (2008) Anal. Chem., 80, pp. 7198-7205Carrilho, E., Laromaine, A., Dillon, S.T., Shaw, B.T., Benassi, M., Cooks, R.G., Lieberman, T., Whitesides, G.M., 3rd Symposium of the Brazilian Society for Mass Spectrometry, Campinas, Brazil 2009, pp. 12-15Zhao, W., Van Den Berg, A., (2008) Lab Chip, 8, pp. 1988-1991Pelton, R., (2009) Trends Anal. Chem., 28, pp. 925-94
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
New Method Of Isotope Pattern Analysis
No full textA program, called AC, has been developed in Turbo Pascal to calculate the elemental compositions of ions produced in low resolution mass spectra by analysis of the isotope patterns. The program compares calculated intensities with experimentally determined intensities and lists the best matches. It also allows for subtraction of overlapping patterns. © 1991.152149155Bell, (1974) J. Chem. Educ., 51, p. 548Dombek, Lowther, Carberry, (1971) J. Chem. Educ., 48, p. 729Kavanagh, Program for elemental analysis using low or medium resolution mass spectra (1980) Organic Mass Spectrometry, 15, p. 334Stenhagen, Abrahamson, McLafferty, (1969) Atlas of Mass Spectral Data, , Interscience, New YorkTenhosarri, Computer-assisted composition analysis of unknown compounds by simultaneous analysis of the intensity ratios of isotope patterns of the molecular ion and daughter ions in low-resolution mass spectra (1988) Organic Mass Spectrometry, 23, p. 23
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
- …
