Relevant bibliographies by topics / Drosera

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Academic literature on the topic 'Drosera'

Author: Grafiati
Published: 4 June 2021
Last updated: 10 February 2022

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Journal articles on the topic "Drosera"

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Crowder, A. A., M. C. Pearson, P. J. Grubb, and P. H. Langlois. "Drosera L." Journal of Ecology 78, no. 1 (March 1990): 233. http://dx.doi.org/10.2307/2261048.

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Fleischmann, Andreas S., Nivo H. Rakotoarivelo, Aymeric Roccia, Paulo M. Gonella, Lala Roger Andriamiarisoa, Aina Razanatsima, and Fortunat Rakotoarivony. "A new and endemic species of Drosera (Droseraceae) from Madagascar." Plant Ecology and Evolution 153, no. 2 (July 8, 2020): 283–91. http://dx.doi.org/10.5091/plecevo.2020.1705.

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Background and aims – This study is part of an ongoing revision of the world Drosera species. During herbarium revisions of Drosera from Madagascar, a new species was identified and is here described.Methods – The species’ morphology is described based on herbarium studies and observation of living plants in situ, and ecological notes from field observations are provided. The species is compared and contextualized within the current subgeneric classification of Drosera.Key results – The new species, Drosera arachnoides, is recognized as most closely related to another Malagasy-endemic, D. humbertii, from which it is morphologically and ecologically distinct. The new species is placed within D. subg. Drosera sect. Ptycnostigma. Based on the restricted occurrence, the species is assessed as Vulnerable, following IUCN categories and criteria. A key to the Drosera species from Madagascar is provided.Conclusion – Drosera arachnoides is the second endemic Drosera species in Madagascar and raises the total number of species on the island to six.
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Konishchuk, V. V., and O. I. Skakalska. "Drosera in Ukraine: Ecological, сhorological specifics and phytosozonomical characteristics." Biosystems Diversity 27, no. 1 (February 9, 2019): 3–15. http://dx.doi.org/10.15421/011901.

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The paper presents a chorologically systematized description of all taxa of the Drosera L. genus in Ukraine. We performed an analysis of environmental conditions, phytocoenotic characteristics and found new locations of sundew. We generalized the morphometric parameters and proposed a concept – “leaf roundness index”; and recommended including Drosera rotundifolia, Drosera x obovata in the next edition of the Red Data Book of Ukraine due to the contraction of their habitat and their high degree of vulnerability to unfavourable environmental factors and anthropogenic impact; we reccommend growing Drosera ex-situ on the example of Kremenets Botanical Garden with further repatriation in-situ; proved the efficiency of the proposed methods of farming cultivation. The paper substantiates the complex of phytosozological criteria, measures for protection and reproduction of the endangered species of Drosera genus. We suggested a hypothesis about the independence of the taxon of Drosera x obovata. Despite the fact that Drosera longifolia x D. rotundifolia is generally considered to be sterile hybrid, individuals breed vegetatively, are fertile and retain germinability after germination, and have a clearly specific ecotype, sometimes loci are isolated from parent species. To isolate the Drosera x obovata as a single taxon, additional phylogenetic studies are needed, but as a rare, disappearing taxon it needs protection and background monitoring of populations. The area of greatest phytosozological value for sundews in Ukraine is Western Polissia (Volyn, Rivne regions) (D. longifolia – 31, 20 sites, D. intermedia – 31 and 30 respectively). Drosera longifolia is on average distributed slightly further south in Ukraine than D. intermedia, although both taxa are confined to the humid, boreal zone. D. rotundifolia is most widespread in the humid zone (Polissia, the Carpathians). Despite the presence of Drosera x obovata in the Cheremskyi, Rivnenskyi Nature Reserve, Shatskyi National Nature Park, and several landscape reserves, the taxon is continuing to disappear due to succession, afforestation, water regime change etc.
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Quach, Phuong Ngo Diem, Minh Thi Thanh Hoang, Thu Thi Hoang, and Le Van Bui. "CALLUS AND CELL SUSPENSION CULTURE OF DROSERA BURMANNI VAHL FOR QUINONE PRODUCTION." Science and Technology Development Journal 13, no. 2 (June 30, 2010): 53–61. http://dx.doi.org/10.32508/stdj.v13i2.2126.

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Drosera burmanni Vahl, one of three Drosera species in Vietnam, has been successfully cultured in vitro. Our previous researchs have shown that extracts of Drosera burmanni Vahl contain bioactive compounds such as naphthoquinone, anthraquinone. To obtain cell biomass as well as increase secondary metabolites, callus and cell suspension culture of Drosera burmanni Vahl become extremely urgent. Therefore, in this study, we focused on building Drosera burmanni Vahl callus and suspension culture process to obtain quinone. Our results show that the most optimized medium for callus culture is Gamborg’s B5, saccharose 20g/l, casein 100 mg/l, PVP 1g/l. To induce callus culture, the best hormone’s concentration is 2,4-D 0,2 mg/l, NAA 0,2 mg/l. Growing callus and increasing cell biomass in suspension culture are the same culture type. The peak of growing phase is on 12th. HPLC analysis showed present of plumbagin, one of quinone bioactive compounds determined in Drosera species, on cultured cell suspension.
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Murza, Gillian L., and Arthur R. Davis. "Comparative flower structure of three species of sundew (Drosera anglica, Drosera linearis, and Drosera rotundifolia) in relation to breeding system." Canadian Journal of Botany 81, no. 11 (November 1, 2003): 1129–42. http://dx.doi.org/10.1139/b03-104.

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Whereas much attention has been given to the fascinating prey-trapping leaves of carnivorous plants, less research has been conducted on their flower structure and breeding systems. Accordingly, a comparative study of the floral morphology and anatomy of the three species of sundews (Droseraceae: Drosera anglica Huds., Drosera linearis Goldie, and Drosera rotundifolia L.) in Saskatchewan was performed to ascertain the presence of floral rewards for potential pollinators and to obtain pollen to ovule ratios, an indicator of breeding system. Utilizing light and scanning electron microscopy, differences between the three species were apparent in length of styles, number of placentas, anther and pollen colour, and structure of glandular trichomes on sepals. The occurrence of features unique to each species does not support the concept of D. anglica as a hybrid of the other two species. Flowers of all three species lack nectaries, although clusters of papillate cells that were reminiscent of secretory tissue were observed at the apices of anthers and at the summits of ovaries. Pollen to ovule ratios were low for all species, ranging from 9.0 to 18.7 in D. rotundifolia and D. linearis, respectively, suggesting an autogamous breeding system for each species.Key words: Drosera anglica, Drosera linearis, Drosera rotundifolia, Droseraceae, comparative flower structure, pollen to ovule ratios, breeding system.
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Hayakawa, Hiroshi, Hidenori Hamachi, Kohei Ogawa, Yukio Minaniya, Jun Yokoyama, Ryo Arakawa, and Tatsuya Fukuda. "New records of Drosera tokaiensis subsp. hyugaensis (Droseraceae) from Kochi Prefecture, Japan." Botany 90, no. 8 (August 2012): 763–69. http://dx.doi.org/10.1139/b2012-036.

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Drosera tokaiensis subsp. hyugaensis (3x), a hybrid between Drosera spatulata (4x) and Drosera rotundifolia (2x), was found in Kochi Prefecture, Japan. Results of PCR–RFLP analysis of the internal transcribed spacer (ITS) regions of nuclear DNA showed that the hybrid individuals had the combined patterns of both parental species. Moreover, the chloroplast DNA of all hybrid individuals was identical to that of D. spatulata, suggesting that the hybrids were generated as a result of the transfer of pollen grains from D. rotundifolia to D. spatulata. Drosera tokaiensis subsp. hyugaensis was reported from Miyazaki and Kochi prefectures only. Drosera tokaiensis subsp. tokaiensis (6x), which is an allopolyploid species of D. tokaiensis subsp. hyugaensis, grows mainly in the Tokai and Kinki districts and is not distributed with D. tokaiensis subsp. hyugaensis in Miyazaki and Kochi prefectures. These findings indicate that the hybridization between D. spatulata and D. rotundifolia occurred independently and repeatedly in various areas of Japan.
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Jones, James M. C., Hugues B. Massicotte, and Arthur L. Fredeen. "Calcium and pH co-restrict abundance of Drosera rotundifolia (Droseraceae) in a Sphagnum bog in central British Columbia." Botany 94, no. 2 (February 2016): 139–46. http://dx.doi.org/10.1139/cjb-2015-0136.

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The genus Drosera (sundews) is represented in British Columbia (BC), Canada, by Drosera rotundifolia (L.), Drosera anglica (Huds.), and their hybrid Drosera × obovata (Mert. & W.D.J. Koch). All three can be found in Sphagnum bogs of central BC, including those within the Aleza Lake Research Forest (ALRF) located 60 km east of Prince George. Vegetation patterns in bogs are known to be correlated with light, water, and nutrient gradients, and despite information being available on the influence of light and water on Drosera occurrence, little information is known about the role of nutrients. Here, we focused on a bog containing all three Drosera species, to determine whether nutrient levels are related to the abundance of the widespread species, D. rotundifolia. Univariate regression tree analysis between soil water chemistry and D. rotundifolia numbers indicates that D. rotundifolia is a calcifuge, preferring moderately acidic soil pH (>5.5) and relatively low calcium levels (<2.88 ppm). This study provides evidence that high soil water calcium and low pH limit the growth of D. rotundifolia in field populations. The physiology underlying this preference, how this is affected by hybridization between other sundew species, and how this mineralogical limitation interacts with other niche-defining factors to dictate the occurrence of D. rotundifolia are questions that remain to be answered.
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Grima, Peter P. "The Natural Hybrid between Drosera intermedia and Drosera rotundifolia in Massachusetts." Rhodora 122, no. 989 (May 21, 2020): 23. http://dx.doi.org/10.3119/20-08.

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Rusmin, Rusmin, and Ramadanil Pitopang. "KAJIAN MORFOLOGI Drosera burmanni Vahl. DARI DESA MAHOLO, KECAMATAN LORE TIMUR, KABUPATEN POSO, SULAWESI TENGAH." Biocelebes 14, no. 2 (September 1, 2020): 162–67. http://dx.doi.org/10.22487/bioceb.v14i2.15268.

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The research entitled Morphological Studies of Drosera burmanni Vahl. From Maholo Village, Lore Timur District, Poso Regency Cental Sulawesi has been conducted from March to April 2017. The objective of research was to described the morphology character of Drosera which was found in studied area. The research was used botanical exploration in the studied area the morphological character was described followed Van Steenis (1953). The result showed the there were 820 individuals of Drosera burmanni Vahl. the description is provided in this paper.
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ROBINSON, ALASTAIR S., ADAM T. CROSS, MANFRED E. MEISTERL, and ANDREAS FLEISCHMANN. "A new pygmy sundew, Drosera albonotata (Droseraceae), from the western Wheatbelt and an updated diagnostic key to the orange-flowered pygmy Drosera of Western Australia." Phytotaxa 346, no. 3 (April 6, 2018): 221. http://dx.doi.org/10.11646/phytotaxa.346.3.2.

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A new species of Drosera—Drosera albonotata—from the western Wheatbelt (Western Australia) is described and illustrated. The taxon, which is largely restricted to sandy clay loam soils in Wandoo woodland and shrubland, is morphologically similar to D. miniata and D. coomallo but can be distinguished by its distinct floral features and ecology. A distribution map of the new species and its allies and a revised and updated diagnostic key to the twelve recognised orange-flowered pygmy Drosera in Western Australia are provided.
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Dissertations / Theses on the topic "Drosera"

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Nakano, Mariko. "Life history strategies of an amphidiploid species, Drosera tokaiensis." 京都大学 (Kyoto University), 2004. http://hdl.handle.net/2433/147869.

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Stewart, C. Neal. "The ecophysiological significance of insectivory as well as nitrogen and phosphorus availability to sundew nutrient cycling, growth, and success." Thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-03242009-040824/.

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Silva, Paulo Minatel Gonella. "Revisão taxonômica do clado tetraploide-brasileiro de Drosera L. (Droseraceae)." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/41/41132/tde-03042013-090412/.

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O gênero Drosera (Droseraceae) compreende cerca de 200 espécies, 30 delas ocorrendo no Brasil. Nesta dissertação, é realizada a revisão taxonômica do clado tetraploide-brasileiro de Drosera, compreendendo 17 espécies e uma variedade. São apresentados e discutidos dados sobre morfologia, ecologia, distribuição geográfica e status de conservação para estas espécies, com mapas de distribuição, ilustrações, fotografias e tabelas comparativas. Os complexos D. graminifolia, D. Montana e D. villosa são discutidos nos capítulos 1, 2 e 3, respectivamente. Além disso, essas três espécies são recircunscritas com base em evidências morfológicas e de sua ecologia. Drosera ascendens, D. spiralis, D. tomentosa e suas duas variedades são restabelecidas, e D. villosa var. latifólia é elevada ao status específico. Drosera chrysolepis é lectotipificada e três novas espécies são descritas. Drosera camporupestris, D. grantsaui, D. graomogolensis, D. quartzicola, D. tentaculata e D. schwackei também pertencem ao clado e são aqui tratadas. Na seção Taxonomia, é apresentada uma chave de identificação e, no anexo II, uma lista com todos os táxons de Drosera ocorrentes no Brasil e aqui aceitos
The genus Drosera (Droseraceae) comprises around 200 species, 30 occurring in Brazil. In this dissertation is carried out the taxonomic revision of the Brazilian-tetraploid clade of Drosera, comprising 17 species and a variety. Here are presented and discussed data on the morphology, ecology, geographic distribution, and conservation status for these species, with distribution maps, drawings, photographs, and comparative tables. The complexes D. graminifolia, D. Montana, and D. villosa are discussed in chapters 1, 2, and 3, respectively. These three species are recircumscribed based on of morphological and ecological evidences. Drosera ascendens, D. spiralis, D. tomentosa and its two varieties are reestablished, and D. villosa var. latifolia is raised to specific rank. Drosera chrysolepis is lectotypified and three new species are described. Drosera camporupestris, D. grantsaui, D. graomogolensis, D. quartzicola, D. tentaculata, and D. schwackei also belong to this clade and are here treated. In section Taxonomy it is presented a dicotomic key and, in appendix II, a list with all Drosera taxa occurring in Brazil here accepted
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Spolon, Melissa Gallo 1984. "Variação de coloração em Drosera hirtella (Droseraceae) e sua relação com variáveis ambientais." [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/316022.

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Orientadores: João Vasconcellos Neto, Gustavo Quevedo Romero
Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Biologia
Made available in DSpace on 2018-08-22T05:42:43Z (GMT). No. of bitstreams: 1 Spolon_MelissaGallo_M.pdf: 4129370 bytes, checksum: be6d435f92be5c8e9bb999df9fab8da7 (MD5) Previous issue date: 2013
Resumo: Plantas carnívoras, além de autotróficas também capturam presas, o que lhes permite ocupar ambientes pobres em nutrientes. Na região da Serra do Cipó ¿ MG, em uma área de campos rupestres, encontra-se com freqüência a espécie de planta carnívora Drosera hirtella A. St.-Hil. var. hirtella (D. hirtella), que apresenta variação na coloração das folhas e tricomas, havendo plantas desde totalmente verdes até totalmente vermelhas. Essa variação natural permitiu a realização de experimentos para testar as quatro hipóteses que serão descritas nos parágrafos a seguir. Para a primeira hipótese, esperava-se que D. hirtella mais expostas ao sol fossem mais frequentemente vermelhas, enquanto as menos expostas fossem mais frequentemente verdes, sendo a cor vermelha provavelmente uma forma de proteção contra a fotodegradação. Esta hipótese foi corroborada pelo primeiro experimento, que mostrou forte relação da cor de D. hirtella com o nível de exposição solar além de uma grande plasticidade da coloração dessa espécie de acordo com as condições de luminosidade. A segunda hipótese de trabalho foi parcialmente corroborada, pois se esperava que D. hirtella em áreas de solos mais pobres (menor concentração de nitrogênio) fossem mais frequentemente vermelhas, enquanto que D. hirtella em áreas de solos mais férteis (maior concentração de nitrogênio) fossem mais frequentemente verdes. O segundo experimento mostrou que os nutrientes disponíveis podem interferir na coloração da planta. A cor poderia ser assim uma resposta à deficiência de nutrientes disponíveis no solo, mas não necessariamente à deficiência de nitrogênio. A terceira hipótese, em que se esperava que D. hirtella de cor vermelha atraíssem mais insetos do que as de cor verde (um maior número de presas capturadas seria importante em solos pobres em nitrogênio), foram parcialmente corroborada pelos terceiro e quarto experimentos. A atratividade da forma vermelha de D. hirtella foi verificada, no entanto o segundo e o quinto experimentos mostraram que o nitrogênio presente no solo pode não estar interferindo diretamente na cor ou no número de presas capturadas. No terceiro experimento foi possível verificar que plantas vermelhas capturaram mais presas do que plantas verdes e plantas intermediárias. No entanto não ficou claro se a maior taxa de captura foi devida à coloração ou à quantidade de mucilagem, pois plantas vermelhas apresentaram mais tricomas funcionais. O quarto experimento mostrou que simulacros de plantas vermelhas capturaram mais presas em potencial do que simulacros de plantas verdes. Por fim, o quinto experimento não corroborou as predições da quarta hipótese em que se esperava que D. hirtella vermelhas, por capturarem mais presas, deveriam acumular mais 15N em seus tecidos do que as verdes; enquanto os tecidos das plantas verdes teriam mais nitrogênio total do que os tecidos das plantas vermelhas - por estarem em solos supostamente mais ricos em nitrogênio total. A única relação significativa foi à inesperada menor quantidade de 15N (d 15N) em plantas vermelhas. No entanto os resultados também sugerem que plantas vermelhas possam estar obtendo um ganho proporcionalmente maior de d15N, sugerindo que plantas verdes e vermelhas possam utilizar formas diferentes de processar esse isótopo
Abstract: Carnivorous plants are autotrophic organisms that also capture prey, allowing them to occupy nutrient-deficient habitats. In an area of rupestrian fields in the region of Serra do Cipó ¿ MG, the species of carnivorous plant Drosera hirtella A. St.-Hil. var. hirtella (D. hirtella) is frequently observed displaying color variation of its leaves and trichomes, which goes from totally green in some plants until completely red in others. This color variation has led to the experimental tests to examine the validity of four hypotheses. For the first hypothesis we expected that plants of D. hirtella more exposed to the sun were more often red whereas the least exposed plants were more frequently green. The red color is probably a form of protection against photodegradation. The first experiment showed a strong correlation between color of D. hirtella plants with the level of sun exposure and a great plasticity of this species color in accordance with light conditions. The second hypothesis was only partially supported as we expected that D. hirtella in areas of poor soils (less nitrogen) were most often red, whereas D. hirtella in areas of more fertile soils (more nitrogen) should be most often green. The second experiment showed that the availability of nutrients might also influence plant coloration. The color variation could be a general response to nutrient-deficient soils, but not necessarily a response to nitrogen deficiency. The third hypothesis, in which we expected that red plants would attract more insects than green plants (because a greater number of captured preys would be more important in low nitrogen soils), was partially supported by third and fourth experiments. The attractiveness of the red form of D. hirtella was confirmed, but the second and the fifth experiments showed that the nitrogen present in the soil may be not directly interfering in color and/or prey capture. In the third experiment we found that red plants caught more prey than green plants and intermediate plants. However it was unclear whether the higher catch rate was due to color or to the quantity of mucilage, because red plants showed more functional trichomes than green plants. The simulations of the fourth experimental block showed that the simulacra of red plants caught more potential prey than simulacra of green plants. Finally, as mentioned above, the fifth experiment did not exhibit the expected results of the fourth hypothesis, where it was expected that the red form of D. hirtella, by capturing more prey, should accumulate more 15N in their tissues than the green one; whereas the green plants tissues - supposedly living in soils richer in total nitrogen - should have more total nitrogen than the red plants tissues. The only significant relationship was the unexpected smaller d 15N in red plants. However the results also suggest that red plants may have a proportionally greater gain of d 15N, suggesting that green and red plants may use different ways of processing this isotope
Mestrado
Ecologia
Mestre em Ecologia
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Lizcano, Nedy Ramirez. "Combate à adesão de bactérias patogênicas : busca por compostos ativos oriundos de micro-organismos associados ao gênero drosfera." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/119619.

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A presença de bactérias patogênicas com capacidade de formar biofilme nos dispositivos de uso médico constitui um dos principais problemas na saúde pública. O biofilme confere proteção contra os mecanismos de defesa do hospedeiro e ação dos antimicrobianos, aumentando a virulência e resistência dos micro-organismos. A erradicação deste tipo de biofilmes é uma das principais estratégias no tratamento de doenças infecciosas associadas a bactérias patogênicas. A erradicação pode ser feita com o uso de biomoléculas produto do metabolismo secundário de diferentes micro-organismos. O objetivo deste estudo foi procurar novas moléculas com o potencial de erradicar biofilmes patogênicos associados a implantes médicos a partir de bactérias associadas ao género Drosera usando como bactérias alvo os patógenos Pseudomonas aeruginosa e Staphylococcus epidermidis. Para isto, foram crescidos 193 isolados bacterianos associados à planta Drosera que cresce na região litoral de Nova Tramandaí (RS) no sul do Brasil. Do total de isolados bacterianos foram usados os 36 que apresentaram atividade proteolítica para a produção de sobrenadantes bioativos. Os sobrenadantes bioativos foram usados para testes de erradicação de biofilme usando placas de 96 poços e a técnica de Cristal Violeta nas duas bactérias alvo. Nove isolados bacterianos associados à Drosera apresentaram atividade de erradicação de biofilme por acima de 40%, três deles para P. aeruginosa e seis para S. epidermidis. Destes isolados foi escolhido o isolado com melhor atividade de erradicação para P. aeruginosa e foram realizados testes para determinação da concentração mínima de erradicação de biofilme, antiformação de biofilme, viabilidade celular e microscopia eletrônica de varredura junto com a identificação da bactéria por médio de genes 16S, bem como o fracionamento bioguiado do sobrenadante. Adicionalmente, o sobrenadante bioativo foi testado in vitro em um modelo de dispositivo médico (cateter). A bactéria Gram-positiva que apresentou maior atividade de erradicação em seu sobrenadante possui 99% de similaridade com o Bacillus pumilus. Esta atividade de erradicação de biofilme de P. aeruginosa, pode ser atribuída à presença de uma molécula o composto de aproximadamente 34 kDa. Esta biomolécula o composto pode constituir uma alternativa complementária ao uso dos antibióticos convencionais. A perspectiva de purificar e caracterizar esta biomolécula ou composto para P. aeruginosa permitirá estudar seu mecanismo de ação e o uso no tratamento deste biofilme patogénico na clínica.
The presence of pathogenic bacteria with the ability to form biofilm on medical devices is one of the major problems in public health. The biofilm protects against the host defense mechanisms and the action of antibiotics, increasing the virulence and resistance of microorganisms. The elimination of this type of biofilms is a main strategy in the treatment of infectious diseases associated with pathogenic bacteria. This elimination can be done by using biomolecules from the secondary metabolism product of different micro-organisms. The objective of this study was to look for new molecules with the potential to eradicate pathogenic biofilms associated with medical implants from bacteria associated with gender Drosera using bacteria as targets Pseudomonas aeruginosa and Staphylococcus epidermidis pathogens. For this, were grown 193 bacterial isolates associated with Drosera plant that grows in the coastal region of New Tramandaí (RS) in southern Brazil. Of total bacterial isolates were used which had 36 proteolytic activity for the production of bioactive supernatants. The bioactive supernatants were used for biofilm eradication tests using 96- well plates and Crystal Violet technique in both target bacteria. Then the supernatant with the best eradication activity to P. aeruginosa was chosen to determine the minimum concentration to eradicate biofilm, biofilm inhibition, cell viability and scanning electron microscopy together with the identification of the bacteria by means of 16S and bioguided the fractionation of the supernatant. Additionally, the bioactive supernatant was tested in an in vitro model using the clinical device. Nine bacterial isolates associated with Drosera showed biofilm eradication activity by over 40%, three for P. aeruginosa and six for S. epidermidis. The Gram-positive bacterium with 99% similarity to the Bacillus pumilus showed the best biofilm eradication activity to P. aeruginosa capacity allocated to the presence of a molecule composed of approximately 34 kDa. These biomolecules can be an alternative to complement the use of conventional antibiotics or the direct use of antibiotic activity is presented as the case of bioactive found for P. aeruginosa supernatant. The prospect of purify and characterize this biomolecule or compound to P. aeruginosa will allow us to study this mechanism of action and the use in the treatment of this pathogenic biofilm in the clinic.
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Mgidi, Theresa Nobuhle. "The effects of size and habitat on δ N-15 of carnivorous plants (Drosera spp.)." Bachelor's thesis, University of Cape Town, 1999. http://hdl.handle.net/11427/25617.

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The δ N-15 natural abundance method was used to investigate the role of nutrient-poor habitats in carnivorous Drosera capensis and Drosera aliciae, and how that role changes under sunny and shady environmental conditions. The main purpose of the study was to evaluate Givnish's (1984) cost/benefit model used to explain the evolution of carnivory in nutrient-poor, sunny and moist habitats. δ N-15and total nitrogen values of the Drosera species were compared against each other, as well as against the non-carnivorous reference plants collected from each of the two habitats. Generally, data indicated significant differences between the carnivorous plants and their reference plants in terms of δ N-15 values. However, there was no significant difference between plants collected from the shade and those collected from the sun for both Drosera species. Total nitrogen results revealed higher values for Drosera plants from Camp's Bay than those from Table Mountain did. This indicated that there was a bigger source of insect nitrogen at that site, meaning more insects were available and being caught by the plants at Camp's Bay. Further investigations were performed on the two Drosera species in order to find the influence of altitude, leaf-size and plant form, on the degree of carnivory. There was an overall, higher degree of carnivory at Camp's Bay where it is, seasonally wet and the plants have longer leaves and a stem-like rosette. On Table Mountain it is cooler, waterlogged, and the plants have short leaves and ground-level rosettes therefore, the degree of carnivory there was lower. Lastly, chlorophyll and anthocyanin contents were measured and compared between the sun and shade collected D. capensis plants, with tentacles intact and with them removed. Chlorophyll investigations showed significant differences between sun and shade collected D. capensis plants but these were not affected by the removal of tentacles. Alternatively, anthocyanin measurements indicated that sun and shade collected D. capensis plants have similar amounts of anthocyanins, but the removal of tentacles results in a decrease (about four times lower) in the anthocyanin content.
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Susandarini, Ratna. "Investigation on the population variation of Drosera indica L. complex using combined morphological and molecular techniques." Title page, abstract and contents only, 2001. http://web4.library.adelaide.edu.au/theses/09SM/09sms964.pdf.

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Bibliography: leaves 131-159. Drosera indica L. is an annual tropical species of carnivorous plant exhibiting a considerable amount of morphological variability, including plant size, flower colour, stamen form, seed size and seed coat ornamentation pattern. This study aims at investigating the pattern of morphological and genetic variability in this species to determine whether there are morphologically distinguishable groups, and whether these groups are genetically distinct.
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Von, Hase Amrei. "Leaf movement in the carnivorous plant Drosera capensis. What role do actin filaments and turgor changes play?" Thesis, University of Cape Town, 1998. http://hdl.handle.net/11427/26018.

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Biteau, Flore. "Production de protéines recombinantes par des plantes carnivores génétiquement transformées : application à Drosera rotundifolia et transfert de la technologie à Nepenthes alata." Thesis, Vandoeuvre-les-Nancy, INPL, 2009. http://www.theses.fr/2009INPL022N/document.

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Le travail présenté porte sur le développement d’une nouvelle technologie innovante, nommée PAT Friday®, visant à produire des protéines recombinantes au sein des sécrétions extracellulaires de plantes carnivores génétiquement modifiées. Deux objectifs ont été fixés : Réaliser la preuve de concept de la technologie sur le modèle expérimental Drosera rotundifolia, en transformant la plante avec des gènes marqueurs et humains afin de mettre en évidence la présence des protéines recombinantes dans la glu ; et développer, après évaluation, la technologie sur un modèle potentiellement industrialisable, Nepenthes alata. Les résultats ont indiqué la présence des deux protéines marqueurs GFP et GUS dans les tissus et dans la glu de Drosera rotundifolia transformées. Les plantes ont également été transformées génétiquement avec les gènes humains de l’interféron gamma et du facteur intrinsèque. Les protéines recombinantes humaines ont été mises en évidence au sein des tissus végétaux. Le potentiel industriel du modèle Nepenthes alata a ensuite été étudié : 10 à 15 kg de protéines totales par hectare et par an peuvent être produits, grâce notamment à des récoltes successives non destructrices, et la possibilité de contrôler l’activité des protéases digestives naturelles. L’élaboration d’un protocole de régénération de la plante a été entreprise par embryogénèse somatique et organogénèse indirecte, en vue de sa transformation génétique. La technologie PAT Friday®, avec des étapes simplifiées d’extraction et de purification des protéines d’intérêt produites dans le liquide digestif, offre de nouvelles perspectives dans le domaine des protéines thérapeutiques produites à partir de plantes
The present work focuses on the development of a new innovating technology, called PAT Friday®, aiming at producing recombinant proteins into the extra-foliar fluid of modified carnivorous plants. Two objectives were assigned to this work : 1- to realize a proof of concept of the technology on the experimental model Drosera rotundifolia, transformed with marker and human genes, to confirm the occurence of the recombinant proteins into glu ; and 2 - to evaluate and develop, the technology on the model Nepenthes alata, more adapted to industrial scaling-up. The results indicate the presence of two marker proteins GUS and GFP inside the tissues and into the glu of modified Drosera rotundifolia plants. The same plant species has also been transformed with human gamma interferon and intrinsic factor genes. The corresponding human recombinant proteins have been detected into the plant tissues. Potential industrial scaling-up has been studied with the species Nepenthes alata. The results show a potential productivity of 10 to 15 kg of total proteins per hectare per year, thanks to non-destructive repeated harvests, and possibility to efficiently control the natural proteinase activity. The elaboration of a regeneration protocol has been undertaken through indirect organogenesis and somatic embryogenesis, with a view to transform genetically this plant. PAT Friday® technology, with simplified extraction and purification methods of the proteins of interest targeted into the liquid secretions, opens new perspectives in the field of therapeutical proteins produced in plants
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Cook, Joni L. "Following Darwin's footsteps using 'the most wonderful plants in the world' : the ecophysiological responses of the carnivorous plant Drosera rotundifolia to nitrogen availability." Thesis, Loughborough University, 2015. https://dspace.lboro.ac.uk/2134/17778.

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Nitrogen (N) is an essential element to plants for growth, maintenance and reproduction, however most N does not exist in a form that is biologically available to plants. In order to maximise the acquisition and retention of N, plants have evolved a variety of morphological and physiological adaptations and life history strategies, as well as the ability to respond plastically to changes in resource availability in ecological time. Determining the ecophysiological responses of plants to changes in root N availability is crucial to further understanding of the mechanisms underlying competitive interactions between plants, and between plants and other organisms, that ultimately contribute to community structure and ecosystem functioning. Carnivorous plants are ideal systems for investigating ecophysiological responses to N availability as:- (i) they share a unique adaptation for obtaining supplemental N from captured prey, therefore ecological stoichiometry and energetic cost/benefit models may be explored; (ii) the trait of botanical carnivory is widely considered to have independently co-evolved as a response to N-deficient, sunny and wet environments, therefore resource allocation trade-offs between plant investment in N and carbon (C) acquisition may be observed, and (iii) they are extremely sensitive to changes in root N availability in ecological time. In this research, the carnivorous plant Drosera rotundifolia (round-leaved sundew) was used to address several unanswered ecophysiological and evolutionary questions relating to patterns and processes of prey capture and the N nutrition of carnivorous plants. Furthermore, the potential for reducing uncertainty in the calculation of plant reliance on carnivory using a δ15N natural abundance multi-level linear mixing model was explored. A combined approach of in-situ and ex-situ studies was employed, using co-occurring non-carnivorous plants or carnivorous plant species with differing evolutionary lineages or prey capture mechanisms respectively to provide context. Results show that the adaptations of carnivory, high reproductive investment and a relatively short life span enable Drosera rotundifolia to survive and thrive in an extreme, N deficient environment. Phenotypically plastic responses by the plant to light and root N availability provide evidence of resource allocation trade-offs between investment in carnivory for N acquisition and in photosynthesis for C acquisition. Plants invested less heavily in prey capture (measured as the stickiness of leaf mucilage) as N availability increased or light availability decreased. These results show that the energetic costs associated with carnivory are avoided by the plant when less costly sources of N are available for uptake and that the production of carbon-rich mucilage is only made under nutrient-limited and well-lit conditions. Results obtained from the comparison of captured insect prey with background invertebrates of potential prey indicate that Drosera rotundifolia is a dietary generalist, where the quantity of prey captured per plant is positively correlated with leaf stickiness and total leaf area. Plant reliance on prey-derived N decreased with increasing root N availability, providing evidence that carnivory is only of net benefit to the plant in N-deficient and well-lit environments, as the photosynthetic costs of investment in the trait are not exceeded by the energetic gain from prey N uptake in shady or dry habitats. A more accurate and precise method for calculating plant reliance on botanical carnivory is presented which incorporates the insect diet of the plant. This method has wider significance for reducing uncertainty in the calculation of relative source contributions to a mixture for most natural abundance applications using a multi-level linear mixing model. To conclude, results from this research further understanding of the ecophysiological mechanisms underlying plant responses to changes in resource availability and the selective pressures driving the evolution of plant adaptations. These results therefore assist with predicting how plants and plant communities may respond to sustained N deposition inputs and future environmental scenarios.
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Books on the topic "Drosera"

1

Crowder, A. A. Drosera L.. Oxford: Blackwell Scientific Publications, 1990.

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A, Mireya D. Correa. Drosera (Droseraceae). Bronx, N.Y: Published for Organization for Flora Neotropica by The New York Botanical Garden, 2005.

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Horn, Tinus. Droster. Kaapstad: Queillerie, 1996.

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Aslanoglou, Alexēs. Taxideuontas stē droserē nychta. Athēna: Hypsilon/Vivlia, 1991.

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Silagaże, A. Avmartʻe droša mepʻisa, almitʻa citʻel-šavitʻa. Tʻbilisi: Svobodnaia Gruzia, 1999.

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Adami. Adamiani bioetʻikur drosa da sivrcʻeši: Human in bioethical space and time = Chelovek v bioėticheskom vremeni i prostranstve. Tʻbilisi: Konrad Adenauer Stiftung, 2010.

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Anglesey (Wales). County Council (1996-). Adolygiad o drosedd ac anhrefn ar Ynys Môn: Gweithio gyda'n gilydd am ddyfodol diogel = Review of crime & disorder on Anglesey : working together for a safer future. Llangefni: Cyngor Sir Ynys Môn = Isle of Anglesey County Council, 1999.

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Drosera. B. Jain Publishers, 2003.

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Correa, Mireya D., and Tania Regina Dos Santos Silva. Drosera (Droseraceae) (Flora Neotropica Monograph Vol. 96). New York Botanical Garden Pr Dept, 2005.

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Liu, Alvin, and Daniel DiPietro. Drosera of the New Jersey Pinelands, U.S.A. Botanical Research Institute of Texas, 2020.

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Book chapters on the topic "Drosera"

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Bährle-Rapp, Marina. "Drosera rotundifolia." In Springer Lexikon Kosmetik und Körperpflege, 173. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_3427.

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Khare, C. P. "Drosera peltata Sm." In Indian Medicinal Plants, 1. New York, NY: Springer New York, 2007. http://dx.doi.org/10.1007/978-0-387-70638-2_533.

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Bhandari, Gauri S., Ripu M. Kunwar, Rainer W. Bussmann, and Narel Y. Paniagua-Zambrana. "Drosera peltata Thuinb. Droseraceae." In Ethnobotany of the Himalayas, 1–5. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-45597-2_85-1.

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Bhandari, Gauri S., Ripu M. Kunwar, Rainer W. Bussmann, and Narel Y. Paniagua-Zambrana. "Drosera peltata Thunb. Droseraceae." In Ethnobotany of the Himalayas, 1–5. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-45597-2_85-2.

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Bhandari, Gauri S., Ripu M. Kunwar, Rainer W. Bussmann, and Narel Y. Paniagua-Zambrana. "Drosera peltata Thunb. Droseraceae." In Ethnobotany of the Himalayas, 789–93. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-57408-6_85.

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Dieck, Alfred. "Sonnentau (Drosera, Herba Rosellae) als Volksheilmittel in Europa." In Ethnobotanik—Ethnobotany, 35–36. Wiesbaden: Vieweg+Teubner Verlag, 1985. http://dx.doi.org/10.1007/978-3-663-14132-7_7.

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Finnie, J. F., and J. van Staden. "Drosera spp. (Sundew): Micropropagation and the In Vitro Production of Plumbagin." In Biotechnology in Agriculture and Forestry, 164–77. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-642-58062-8_12.

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Šamaj, J., A. Blehová, M. Repčák, M. Ovečka, and M. Bobák. "Drosera Species (Sundew): In Vitro Culture and the Production of Plumbagin and Other Secondary Metabolites." In Medicinal and Aromatic Plants XI, 105–35. Berlin, Heidelberg: Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-662-08614-8_7.

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Barr, Ian, and Feng Guo. "Primary MicroRNA Processing Assay Reconstituted Using Recombinant Drosha and DGCR8." In Methods in Molecular Biology, 73–86. Totowa, NJ: Humana Press, 2013. http://dx.doi.org/10.1007/978-1-62703-703-7_5.

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Beisel, Chase L., Ryan J. Bloom, and Christina D. Smolke. "Construction of Ligand-Responsive MicroRNAs that Operate Through Inhibition of Drosha Processing." In Methods in Molecular Biology, 259–67. Totowa, NJ: Humana Press, 2014. http://dx.doi.org/10.1007/978-1-62703-755-6_19.

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Conference papers on the topic "Drosera"

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Raballand, Nicolas, Sylvain Bertrand, Stéphanie Lala, and Baptiste Levasseur. "DROSERA: A DROne Simulation Environment for Risk Assessment." In Proceedings of the 31st European Safety and Reliability Conference. Singapore: Research Publishing Services, 2021. http://dx.doi.org/10.3850/978-981-18-2016-8_236-cd.

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Chraniuk, Milena, Kinga Siatkowsa, and Rafał Banasiuk. "Influence of medium composition on secondary metabolites synthesis in Drosera binata." In Człowiek Nauka Środowisko. Institute of Biotechnology and Molecular Medicine Foundation, 2018. http://dx.doi.org/10.31708/spi3.2018/chra.cns18.

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Blonska, Agnieszka. "THE ECOLOGICAL CONDITIONS OF THE OCCURRENCE OF DROSERA ROTUNDIFOLIA IN MAN-MADE HABITATS." In 13th SGEM GeoConference on ECOLOGY, ECONOMICS, EDUCATION AND LEGISLATION. Stef92 Technology, 2013. http://dx.doi.org/10.5593/sgem2013/be5.v1/s20.124.

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Erni, Philipp, Matthieu Varagnat, Gareth H. McKinley, Albert Co, Gary L. Leal, Ralph H. Colby, and A. Jeffrey Giacomin. "Little Shop of Horrors: Rheology of the Mucilage of Drosera sp., a Carnivorous Plant." In THE XV INTERNATIONAL CONGRESS ON RHEOLOGY: The Society of Rheology 80th Annual Meeting. AIP, 2008. http://dx.doi.org/10.1063/1.2964770.

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Hake, A., F. Begrow, A. Hensel, and M. Düfer. "Naturstoffe und Extrakte aus Drosera rotundifolia steigern die ziliäre Schlagfrequenz bei murinen Trachea-Explantaten." In Jubiläumskongress Phytotherapie 2021 Leib und Magen – Arzneipflanzen in der Gastroenterologie 50 Jahre Gesellschaft für Phytotherapie. Georg Thieme Verlag KG, 2021. http://dx.doi.org/10.1055/s-0041-1731500.

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Siatkowska, Kinga, Milena Chraniuk, and Rafał Banasiuk. "Medium pH and macronutrients content affects growth and production of secondary metabolites by Drosera plants." In Człowiek Nauka Środowisko. Institute of Biotechnology and Molecular Medicine Foundation, 2018. http://dx.doi.org/10.31708/spi3.18/siatk.cns18.

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Karathanasis, Nestoras, Ioannis Tsamardinos, and Panayiota Poirazi. "A bioinformatics approach for investigating the determinants of Drosha processing." In 2013 IEEE 13th International Conference on Bioinformatics and Bioengineering (BIBE). IEEE, 2013. http://dx.doi.org/10.1109/bibe.2013.6701569.

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d'Adda di Fagagna, Fabrizio. "Abstract 1124: Site-specific DICER and DROSHA RNA products control the DNA-damage response." In Proceedings: AACR 104th Annual Meeting 2013; Apr 6-10, 2013; Washington, DC. American Association for Cancer Research, 2013. http://dx.doi.org/10.1158/1538-7445.am2013-1124.

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Rakheja, Dinesh, Kenneth S. Chen, Yangjian Liu, Abhay A. Shukla, Sara Hildebrand, Vanessa Schmid, Xiaoyong Sun, et al. "Abstract A22: Somatic mutations in DROSHA and DICER1 impair microRNA biogenesis in Wilms tumors." In Abstracts: AACR Special Conference: Pediatric Cancer at the Crossroads: Translating Discovery into Improved Outcomes; November 3-6, 2013; San Diego, CA. American Association for Cancer Research, 2014. http://dx.doi.org/10.1158/1538-7445.pedcan-a22.

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Hu, Xingchi, Yanhong Zhou, and Chuang Ma. "Recognizing drosha processing sites by a two-step prediction model with structure and sequence information." In 2012 IEEE International Conference on Bioinformatics and Biomedicine (BIBM). IEEE, 2012. http://dx.doi.org/10.1109/bibm.2012.6392714.

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