1,721,169 research outputs found
A Naturally Decaffeinated Arabica Coffee
No full text[No abstract available]4296994826James, J.E., (1991) Caffeine and Health, , Academic, San DiegoCharrier, A., (1978) La Structure Génétique des Caféiers Spontanés de la Région Malgache (Mascarocoffea). Leurs Relations avec les Caféiers d'Origine Africaine (Eucoffea), , Orstom, ParisMazzafera, P., Carvalho, A., (1992) Euphytica, 59, pp. 55-60Kato, M., Mizuno, K., (2004) Front. Biosci., 9, pp. 1833-1842Ogita, S., Uefuji, H., Yamaguchi, Y., Koizumi, N., Sano, H., (2003) Nature, 423, pp. 823-823(1968) FAO Report: Coffee Mission to Ethiopia 1964-65, , Food and Agriculture Organization, RomeSilvarolla, M.B., Mazzafera, P., Lima, M.M.A., (2000) Gen. Mol. Biol., 23, pp. 213-215Ashihara, H., Suzuki, T., (2004) Front. Biosci., 9, pp. 1864-1876Mazzafera, P., Crozier, A., Sandberg, G., (1994) J. Agric. Food Chem., 42, pp. 1423-1427Evans, W.C., (1996) Trease and Evan's Pharmacognosy, , Saunders, LondonVan Der Vossen, H.A.M., (1985) Coffee - Botany, Biochemistry and Production of Beans and Beverage, pp. 48-107. , (eds Clifford, M. N. & Wilson, K. C.) (Helm, London
Rutin synthase in fava d'anta: Purification and influence of stressors
No full textFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Lucci, N. and Mazzafera, P. 2009. Rutin synthase in fava d'anta: Purification and influence of stressors. Can. J. Plant Sci. 89: 895-902. The flavonoid rutin is synthesized in plants from quercetin, via a process in which isoquercitrin is an intermediary metabolite. In this work, the activities of isoquercitrin synthase and rutin synthase, and the quercetin, isoquercitrin and rutin contents of fava d'anta plants stressed for water (drought and flooding) and salt (NaCl) were studied. In general, stress increased the contents of the three compounds and both enzyme activities. semi-purified rutin synthase and isoquercitrin synthase showed Kin values of 1.816 and 2.10 mu M, respectively, with optimum reaction pHs of 5 and 7., respectively, and an optimum reaction temperature of 35 degrees C. Rutin synthase was purified from leaf buds and showed an apparent molecular mass of 39 KDa by SDS-PAGE. Mass spectrometry analysis of the purified protein did not reveal any similarity to the few known sequenced glycosyltransferases.895895902Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)FAPESP [05/57193-9
Pilocarpine And Related Alkaloids In Pilocarpus Vahl (rutaceae)
Get PDFPilocarpine is mainly known as a drug for the treatment of glaucoma and it is also used as a stimulant of sweat and lachrymal glands. Species of the genus Pilocarpus are collectively named jaborandi in Brazil and their leaves are the only known source of this imidazole alkaloid. Pilocarpine is mainly obtained from two species, Pilocarpus microphyllus and Pilocarpus jaborandi and, despite the economical and pharmacological importance of this alkaloid, very little is known about pilocarpine, from basic information on the contents in different jaborandi species and plant tissues to the biosynthetic route and the metabolic control. This review will focus briefly on the genus jaborandi, then on what is known about pilocarpine biosynthesis followed by possible biotechnological applications aiming to produce the alkaloid in vitro. Finally, the alkaloids found in this genus, their plant sources and pharmacological applications will be reviewed. © 2010 Nova Science Publishers, Inc.6380Abreu, I.N., Andreazza, N.L., Sawaya, A.C.H.F., Eberlin, M.N., Mazzafera, P., Cell suspension as a tool to study the biosynthesis of pilocarpine in Jaborandi (2007) Plant Biology, 9, pp. 793-799Abreu, I.N., Mazzafera, P., Eberlin, M.N., Zullo, M.A.T., Sawaya, A.C.H.F., Characterization of the variation of the imidazole alkaloid profile of Pilocarpus microphyllus in different seasons and parts of the plant by electrospray ionization mass spectrometry fingerprinting and identification of novel alkaloids by tandem mass spectrometry (2007) Rapid Commun. Mass Spectr, 21, pp. 1205-1213Abreu, I.N., Sawaya, A.C.H.F., Eberlin, M.N., Mazzafera, P., Production of pilocarpine in callus of Jaborandi (Pilocarpus microphyllus Stapf) (2005) Vitro Cellular Developmental Biology - PLANT, 41, pp. 806-811Andrade, P., Willoughby, R., Pomponi, S.A., Kerr, R.G., Biosynthetic studies of the alkaloid, stevensine, in a cell culture of the marine sponge Teichaxinella morchella (1999) Tetrahedron Letters, 40, pp. 4775-4778Andrade-Neto, M., Mendes, P.H., Silveira, E.R., An imidazole alkaloid and other constituents from Pilocarpus trachyllophus (1996) Phytochemistry, 42, pp. 885-887Andreazza, N.L., (2009) Transporte de pilocarpina em suspensões celulares de Pilocarpus microphyllus, , Universidade estadual de CampinasAndreazza, N.L., Abreu, I.N., Sawaya, A.C.H.F., Eberlin, M.N., Mazzafera, P., Production of imidazole alkaloids in cell cultures of jaborandi as affected by the medium pH (2008) Biotechnology Letters, 31, pp. 607-614Avancini, G., Abreu, I.N., Saldaña, M.D.A., Mohamed, R.S., Mazzafera, P., Induction of pilocarpine formation in jaborandi leaves by salicylic acid and methyljasmonate (2003) Phytochemistry, 63, pp. 171-175Baricevic, D., Umek, A., Kreft, S., Maticic, B., Zupancic, A., Effect of water stress and nitrogen fertilization on the content of hyoscyamine and scopolamine in the roots of deadly nightshade (Atropa belladonna) (1999) Environmental and Experimental Botany, 42, pp. 17-24Braun, M., Buhne, C., Cougali, D., Schaper, K., Frank, W., Convergent diasteroselective synthesis of isopilocarpine by one-pot Michael-addition-alkylation reaction (2004) Synthesis, 17, pp. 2905-2909Cordell, G.A., (1981) Introduction to alkaloids: a biogenetic approach, , New York, John Wiley & SonsDavies, S.G., Roberts, P.M., Stephenson, P.T., Thomson, J.E., Syntheses of the racemic jaborandi alkaloids pilocarpine, isopilocarpine and pilosinine (2009) Tetrahedron Letters, 50 (3127), pp. 3509-3512Davies, S.G., Robets, P.M., Stephenson, P.T., Storr, H.R., Thomson, J.E., A practical and scalable total synthesis of the jaborandi alkaloid (+)-pilocarpine (2009) Tetrahedon, 65, pp. 8283-8296de Luca, L., Naturally occurring and synthetic imidazoles. Their chemistry and their biological activities (2006) Current Medical Chemistry, 13, pp. 1-23Dewick, P.M., (1997) Medicinal natural products: a biosynthetic approach, , New York, John Wiley & SonsGerard, A.W., Alkaloid and active principles of jaborandi (1875) Pharmaceutical Journal, 5, p. 865Godoy-Hernandez, G.C., Vazquez-Flota, F.A., Loyola-Vargas, V.M., The exposure to trans-cinnamic acid of osmotically stressed Catharanthus roseus cells cultured in a 14-L bioreactor increases alkaloid accumulation (2000) Biotechnology Letters, 22, pp. 921-925Goodman, L.S., Gilman, A., (2001) The pharmacological basis of therapeutics, , 10th edition, New York, McGraw Hill Companies IncHardy, M.E., Sur le jaborandi (Pilocarpus pinnatus) (1875) Bulletin Societe Chimi Paris, 24, pp. 497-500Hemscheidt, T., Spenser, I.D., Biosynthesis of anosmine, an imidazólico alkaloid of the orchid Dendrobium parishii (1991) Journal of Chemical Society - Chemical Communications, 7, pp. 494-497Hill, R.K., Barcza, S., Sterochemistry of the Jaborandi alkaloids (1966) Tetrahedon, 22, pp. 2889-2893Holmstead, B., Wassen, S.H., Schultes, R.E., Jaborandi: an interdisciplinary appraisal (1979) Journal of Ethnopharmacology, 1, pp. 3-21(1992) Instituto Brasileiro do Meio Ambiente e dos Recursos Naturais Renováveis., pp. 870-872. , IBAMA, Portaria n° 06N, Diário Oficial, Brasília, janeiro 15, 1992Joseph, C.J., Revisão sistemática do gênero Pilocarpus (ssp. brasileiras) (1967) Mecânica Popular, pp. 1-9. , OctoberKaastra, R.C., (1982) Pilocarpinae. Flora Neotropica. Monograph number 33, , New York Botanical Garden, New YorkLi, Z.H., Liu, Z.J., Effect of NaCl on growth, morphology, and camptothecin accumulation in Camptotheca acuminata seedlings (2003) Canadian Journal of Plant Science, 83, pp. 931-938Link, H., Bernauer, K., Über die Synthese der Pilocarpus-alkloide isopilosin und pilocarpin, sowie die absolute konfiguration dês (+)- Isopilosins (1972) Helvetica Chimica Acta, 55, pp. 1053-1062Link, H., Bernauer, K., Oberhans, W.E., Configuration of Pilocarpus alkaloids (1974) Helvetica Chimica Acta, 57, pp. 2199-2200Lucio, E.M.R., Rosalen, P.L., Sharapin, N., Souza-Brito, A.R.M., Avaliação toxicológica e screening hipocrático de epiisopilosine, alcalóide secundário de Pilocarpus microphyllus Staph (2000) Revista Brasileira de Farmacognosia, 9, pp. 23-35Lucio, E.M.R., Sharapin, N., França, H.S., Estudo de alcalóides de Pilocarpus pennatifolius Lemaire (2002) Revista Brasileira de Farmacognosia, 12, pp. 130-131Merbel, N.C., Tinke, A.P., Oosterhuris, B., Jonkman, J.H.G., Bohle, J.F., Determination of pilocarpine, isopilocarpine, pilocarpic acid and isopilocarpic aid in human plasma and urine by high performance liquid chromatography and tandem spectrometric detection (1998) Journal of Chromatography B, 708, pp. 103-112Oksman-Caldentey, K.M., Inze, D., Plant cell factories in the post-genomic era: New ways to produce designer secondary metabolites (2004) Trends in Plant Science, 9, pp. 433-440Oliveira, P.D., (2007) Filogenética de Pilocarpinae (Rutaceae), , PhD Thesis, Universidade de São PauloPark, R., On the use of Jaborandi or pilocarpine in the collapse of scarlatina maligna (1883) Lancet, 121, p. 1041Payo Hill, A., Dominicis, M.E., Oquendo, M., Sarduy, R., Obtención de pilocarpina a partir de Pilocarpus racemosus Vahl (1995) Revista Cubana de Farmacia, 29, pp. 123-125Pinheiro, C.U.B., Jaborandi (Pilocarpus sp., Tutaceae): a wild species and its rapid transformation into a crop (1997) Econ. Bot, 51, pp. 49-58Pinheiro, C.U.B., Extrativismo, cultivo e privatização do jaborandi (Pilocarpus microphyllus Stapf ex Holm.Rutaceae) no Maranhão (2002) Acta bot. bras, 16, pp. 141-150Rastogi, N., Abaul, J., Goh, K.S., Devallois, A., Philogene, E., Bourgeois, P., Antimycobacterial activity of chemically defined natural substances form the Caribbean flora in Guadeloupe (1998) FEMS Immunology and Medical Microbiology, 20, pp. 267-273Sandhu, S.S., Abreu, I.N., Colombo, C.A., Mazzafera, P., Pilocarpine content and molecular diversity in Jaborandi (2005) Scientia Agricola, 63, pp. 478-482Santos, A.P., Moreno, P.R.H., Pilocarpus spp.: A survey of its chemical constituents and Biological activities (2004) Brazilian Journal of Pharmaceutical Sciences, 40, pp. 115-137Sawaya, A.C.H.F., Abreu, I.N., Andreazza, N.L., Eberlin, M.N., Mazzafera, P., HPLC-ESI-MS/MS of imidazole alkaloids in Pilocarpus microphyllus (2008) Molecules, 13, pp. 1518-1529Sawaya, A.C.H.F., Gontijo Vaz, B., Eberlin, M.N., Mazzafera, P., (2010) Comparative study of imidazole alkaloids in seven species of Pilocarpus, , SubmmitedSkorupa, L.A., (1996) Revisão Taxonômica de Pilocarpus Vahl (Rutaceae), , PhD Thesis, Universidade de São PAuloSousa, M.P., Matos, M.E.O., Matos, F.J.A., Machado, M.I.L., Craveiro, A.A., (1991) Constituintes químicos ativos de plantas medicinais brasileiras, , Fortaleza, Brazil, Editora da Universidade Federal do CearáSouza, R.C., Fernandes, J.B., Vieira, P.C., Silva, M.F.G.F., Godoy, M.F.P., Pagnocca, F.C., Bueno, O.C., Pirani, J.R., New imidazole alkaloid and other constituents from Pilocarpus grandiflorus and their antifungal activity (2005) Zeitschrift für Naturforschung B, 60, pp. 787-791Stafford, A., Morris, P., Fowler, M.W., Plant cell biotechnology: a perpective (1986) Enzyme Microbial Technology, 8, pp. 578-587Superintendência do Desenvolvimento do Maranhão (1970) Novo Zoneamento do Estado do Maranhão, , SUDEMA, São Luis, MATedeschi, E., Kamionsky, J., Zeider, D., Fackler, S., Isolation, characterization, and synthesis of trans-pilosine stereoisomers occurring in nature Circular dicrooism and mass spectral studies (1974) Journal of Organic Chemistry, 39, pp. 1864-1879Uva, L., Librizzi, L., Marchi, N., Noe, F., Bongiovammi, R., Vezzani, A., Janigro, D., de Curtis, M., Acute induction of epilelptiform discharges by pilocarpine in the in vitro isolated guinea-pig brain requires enhancement of blood-brain barrier permeability (2008) Neuroscience, 151, pp. 303-312Valdez, I.H., Wolff, A., Atkinson, J.C., Macynsky, A.A., Foz, P.C., Use of pilocarpine during head and neck radiation therapy to reduce xerostomia and salivary dysfunction (1993) Cancer, 71, pp. 1848-1851Van der Fits, L., Zhang, H., Menke, F.L.H., Deneka, M., Memelink, J., A Catharanthus roseus BPF-1 homologue interacts with an elicitor-responsive region of the secondary metabolite biosynthetic gene Str and is induced by elicitor via a JA-independent signal transduction pathway (2000) Plant Molecular Biology, 44, pp. 675-685Verpoorte, R., Memelink, J., Engeneering secondary metabolite in plant (2002) Current Opinion in Biotechnology, 13, pp. 181-187Verpoorte, R., v.d.H., R., Schripsema, J., Hoge, J.H.C., Ten Hoopen, H.J.G., Plant cell biotechnology for the production of alkaloids: Present status and prospects (1993) Journal of Natural Products, 56, pp. 186-207Verpoorte, R., vanderHeijden, R., tenHoopen, H.J.G., Memelink, J., Metabolic engineering of plant secondary metabolite pathways for the production of fine chemicals (1999) Biotechnology Letters, 21, pp. 467-479Vieira, R.F., Conservation of medicinal and aromatic plants in Brazil (1999) Perspectives on new crops and new uses, pp. 152-159. , Janick, J., Alexandria, ASHS PressVoigtlander, H.W., Balsam, G., Engelhardt, M., Epiisopiloturin, ein Neues Pilocapus-Alkaloid (1978) Archiv der Pharmazie, 311, pp. 927-93
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Carbon Fixation And Partitioning In Coffee Seedlings Infested With Pratylenchus Coffeae
No full textThe objective was to study CO 2 fixation and photoassimilate partition in coffee (Coffea arabica) seedlings infested with the lesion nematode Pratylenchus coffeae. Seedlings infested with 0, 1000 and 8000 Pratylenchus coffeae nematodes were exposed to 14CO 2 and the incorporation and distribution of radioactivity were followed in the roots, stems and leaves. Fresh mass, pigments, soluble sugars, sucrose and specific radioactivity of sucrose in the plant parts were determined. At the highest level of infestation almost all the parameters were significantly changed showing the carbon fixation in the leaves and partitioning to the roots were decreased. Since lesion nematodes are not sedentary and do not form feeding sites that could be characterised as metabolic sinks, it is suggested that their damage is more readily expressed by the leaves, through a reduction in photosynthesis and phloem transport.1108861865Bird, A.F., Loveys, B.R., The incorporation of photosynthates by Meloidogyne javanica (1975) Journal of Nematology, 7, pp. 111-113Campos, V.P., Sivapalan, P., Gnanapragasam, N.C., Nematode parasites of coffee, cocoa and tea (1990) Plant Parasitic Nematodes in Subtropical and Tropical Agriculture, pp. 387-430. , Luc M, Sikora RA and Bridge J (eds) CAB International, Wallingford, UKCarneiro, R.G., Mazzafera, P., Ferraz, L.C.C.B., Carbon partitioning in soybean infected with Meloidogyne incognita and M. javanica (2000) Journal of Nematology, 31, pp. 348-355Chaplin, M.F., Monosaccharides (1986) Carbohydrate Analysis: A Pratical Approach, pp. 1-36. , Chaplin, MF and Kennedy JF (eds) IRL Press, Oxford, Washington DCDavies, E., Plant Responses to wounding (1987) Physiology of Metabolism, pp. 243-264. , Davies DD (ed) Academic Press, New YorkDubois, M.K., Giller, K.A., Hamilton, J.K., Ribers, P.A., Smith, T., Colorimetric method for determination of sugars and related substances (1956) Analytical Chemistry, 28, pp. 360-365Duncan, L.W., Inserra, R.N., Thomas, W.K., Dunn, D., Mustika, I., Frisse, L.M., Mendes, M.L., Kaplan, D.T., Molecular and morphological analyses of isolates of Pratylenchus coffeae and closely related species (1999) Nematropica, 29, pp. 61-80Edwards, D.I., Wehunt, E.J., Hosts of Pratylenchus coffeae with additions from Central American banana-producing areas (1973) Plant Disease Reporter, 57, pp. 47-50Hussey, R.S., Host-parasite relationships and associated physiological changes (1985) An Advanced Treatise on Meloidogyne, 1, pp. 143-153. , Sasser JN and Carter CC (eds), North Caroline State University Graphics, RaleighInomoto, M.M., Oliveira, C.M.G., Mazzafera, P., Gonçalves, W., Effects of Pratylenchus brachyurus and P. coffeae on seedlings of Coffea arabica (1998) Journal of Nematology, 30, pp. 362-367Inserra, R.N., Duncan, L.W., Troccoli, A., Dunn, D., Maia Dos Santos, J., Kaplan, D., Vovlas, N., Pratylenchus jaehni sp. n. from citrus in Brazil and its relationship with P. coffeae and P. loosi (Nematoda: Pratylenchidae) (2001) Nematology, 3, pp. 653-665Kubo, R.K., Silva, R.A., Tomazini, M.D., Oliveira, C.M.G., Mazzafera, P., Inomoto, M.M., Patogenicidade de Pratylenchus coffeae em plântulas de cafeeiro cv. Mundo Novo (2003) Fitopatologia Brasileira, 28, pp. 41-48Lichtenthaler, H.K., Wellburn, A.R., Determination of total carotenoids and chlorophylls a and b of leaf extracts in different solvents (1983) Biochemical Society Transactions, 11, pp. 591-592Monteiro, A.R., Lge, L., Encontre do nematóide Pratylenchus coffeae atacando cafeeiro em São Paulo (1974) Revista de Agricultura, 49, p. 164Poskuta, J.W., Dropkin, V.H., Nelson, C.J., Photosynthesis, photorespiration, and respiration of soybean after infection with root nematodes (1986) Photosynthetica, 20, pp. 405-410Riedel, R.M., Forter, J.G., Mai, W.F., A simplified medium for monoxenic culture of Pratylenchus penetrans and Ditylenchus dipsaci (1973) Journal of Nematology, 5, pp. 71-72Silva, R.A., Inomoto, M.M., Host-range characterization of two Pratylenchus coffeae from Brazil (2002) Journal of Nematology, 34, pp. 135-139Sturm, A., Invertases: Primary structures, functions, and roles in plant development and sucrose partitioning (1999) Plant Physiology, 121, pp. 1-7Southey, J.F., (1986) Laboratory Methods for Work with Plant and Soil Nematodes Her Majesty's Stationery Office, , LondonVaast, Ph., Caswell-Chen, E.P., Zasoski, R.J., Effects of two endoparasitic nematodes (Pratylenchus coffeae and Meloydogyne konaensis) on ammonium and nitrate uptake by Arabica coffee (Coffea arabica L.) (1998) Applied Soil Ecology, 10, pp. 171-178Van Handel, E., Direct microdetermination of sucrose (1968) Analytical Biochemistry, 22, pp. 280-28
Induction Of Secondary Metabolites In Plantlets Of Hypericum Brasiliense Choisy In Vitro [indução De Metabólitos Secundários Em Plântulas De Hypericum Brasiliense Choisy Crescendo In Vitro]
No full textThe production of rutin, quercetin, 1,5-dihydroxyxanthone and betulinic acid was investigated in plantlets of H. brasieliense in vitro, and exposed to salycilic acid, poliethylene glycol, NaCl, 24-epibrassinolide, benzothiadiazole (BION), methyljasmonate and increased concentrations of boron and nitrogen in the liquid culture medium. Evaluations of the contents were carried out after 5 and 10 days of treatments. The highest increase was observed in quercetin in the salycilic acid and B treatments after 5 days of exposure, and in 24-epibrassinolide and BION after 10 days.392267272Abreu, I.N., Porto, A.L.M., Marsaioli, A.J., Mazzafera, P., Distribution of bioactive substances from Hypericum brasiliense during plant growth (2004) Plant Science, 167, pp. 949-954Abreu, I.N., Mazzafera, P., Effects of water and temperature stress of activity constituent Hypericum brasiliense Choisy (2005) Plant Physiology and Biochemistry, 43, pp. 241-248Abreu, I.N., (2002) Isolamento e produção de substâncias de interesse farmacológico de Hypericum brasiliense Choisy, , Tese de doutorado, Universidade Estadual de Campinas, Campinas, São PauloAvancini, G., Abreu, I.N., Saldaña, M.D.A., Mohamed, R.S., Mazzafera, P., Induction of pilocarpine formation in jaborandi leaves by salicylic acid and methyljasmonate (2003) Phytochemistry, 63, pp. 171-175Barber, G.A., Behrman, E.J., The synthesis and characterization of uridine 5'-(beta-L-rhamnopyranosyl diphosphate) and it role in the enzymatic-synthesis of rutin (1991) Archives of Biochemistry and Biophysics, 288, pp. 239-242Beerhues, L., Berger, U., Differential accumulation of xanthone in methyl jasmonate and yeast extract treated cell cultures of C. erythraea and C. littorale (1995) Planta, 197, pp. 608-612Brachet, J., Cosson, L., Changes in the total alkaloid content of Datura inoxia Mill. subjected to salt stress (1983) Journal of Experimental Botany, 37, pp. 650-656Cardoso, M.A., Oliveira, D.E., Tissue culture of Hypericum brasiliense Choisy: Shoot multiplication and callus induction (1996) Plant Cell Tissue and Organ Culture, 44, pp. 91-94Choe, S., Brassinosteroid biosynthesis and inactivation (2006) Physiologia Plantarum, 126, pp. 539-548Conceição, L.R.F., Ferreres, F., Tavares, R.M., Induction of phenolic compounds in Hypericum perforatum L. cells by Colletotrichum gloesporioides elicitation (2006) Phytochemistry, 67, pp. 149-155Croteau, R., Kutchan, T.M., Lewis, N.G., Natural products (Secondary metabolites) (2000) Biochemistry and Molecular Biology of Plants, pp. 1250-1318. , In: Buchanan, B.Gruissem, W.Jones, R. 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Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe 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
Publishing New And Valuable Information On Abiotic Stress Responses In Plants
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