Relevant bibliographies by topics / Schefflera

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Academic literature on the topic 'Schefflera'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Schefflera"

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Tolska, Timo. "Kognitiivinen järjestelmä ja sen yhteydet kasvatukseen Israel Schefflerin filosofiassa." Aikuiskasvatus 23, no. 3 (September 15, 2003): 184–92. http://dx.doi.org/10.33336/aik.93492.

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Lukiessani Israel Schefflerin tekstejä huomasin meitä molempia kiinnostavan ihmisen kognitiivinen järjestelmä ja kasvatus. Israel Scheffler on koulutusfilosofian tutkimuskeskuksen johtaja Harvardin yliopistossa. Hänen uransa alkoi Harvardissa jo vuonna 1952. Scheffleriä pidetään kasvatusfilosofina, joka on ollut pitkän uransa aikana kiinnostunut monista asioista, esimerkiksi kielifilosofiasta, tieteenfilosofiasta ja kasvatuksen kysymyksistä. Schefflerin ajattelua on Suomessa tutkittu varsin vähän, vaikka häntä pidetään englanninkielisellä alueella hyvin merkittävänä kasvatusfilosofiana.
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Holma, Katariina, and Timo Tolska. "Israel Scheffler – pragmatisti, realisti vai relativisti?" Aikuiskasvatus 23, no. 4 (December 1, 2003): 298–303. http://dx.doi.org/10.33336/aik.93513.

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Israel Scheffleriä voidaan joiltain osin tulkita kantilaisena pragmatistina, kuten Timo Tolska häntä tulkitsee Aikuiskasvatus-lehdessä (3/2003) julkaistussa artikkelissaan ”Kognitiivinen järjestelmä ja sen yhteydet kasvatukseen Israel Schefflerin filosofiassa”. Toinen mahdollinen, mielestäni perustellumpi Scheffler-tulkinta korostaa Scheffleriä yhtenä merkittävimmistä filosofeista, jotka ovat argumentoineet uuden, käsitejärjestelmiimme ennen sisältymättömän tiedon mahdollisuuden puolesta. Tämän tulkinnan pohjalta voidaan päätyä näkemykseen Scheffleristä ontologisena realistina. Sivulla 303: Timo Tolska vastaa / Timo Tolska
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Oskolski, Alexei A., and Porter P. Lowry II. "WOOD ANATOMY OF SCHEFFLERA AND RELATED TAXA (ARALIACEAE). II. SYSTEMATIC WOOD ANATOMY OF NEW CALEDONIAN SCHEFFLERA." IAWA Journal 22, no. 3 (2001): 301–30. http://dx.doi.org/10.1163/22941932-90000287.

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The wood anatomy of 22 of the 26 species of Schefflera occurring in New Caledonia was studied. Only two features (the presence of scalariform perforation plates and scanty paratracheal axial parenchyma) appear to be constant throughout the species examined. The pattern of wood structure diversity was analyzed using PCA; the results generally agree with the current recognition of four groups of species among New Caledonian Schefflera based on macromorphology. Three of these groups (Dizygotheca, “Canacoschefflera” and “Gabriellae”) represent natural assemblages closely related to one another. The fourth group (Schefflera sect. Schefflera) is isolated from the others, as indicated by its very large rays and abundant septate fibres. The occurrence of crystals in chambered cells of axial parenchyma was observed for the first time in Araliaceae. The wood structure of Schefflera plerandroides, previously placed in the segregate genus Octotheca, shows no essential differences from that of the other members of the Dizygotheca group, supporting the hypothesis that polymerous flowers have evolved independently at least twice within the Schefflera alliance.
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Horton, R. F. "ABSCISSION IN SCHEFFLERA." Acta Horticulturae, no. 553 (June 2001): 127–28. http://dx.doi.org/10.17660/actahortic.2001.553.23.

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Leonhardt, Kenneth W. "Intergeneric Graft Compatibility within the Family Araliaceae." HortTechnology 6, no. 3 (July 1996): 254–56. http://dx.doi.org/10.21273/horttech.6.3.254.

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Novelty Araliaceae potted plants were created by a wide variety of interspecific and intergeneric graft combinations. Twenty-four species of 10 genera were tested, of which 20 species of eight genera resulted in 85 graft combinations that grew. Intergeneric graft combinations with Schefflera arboricola included eight species in five other genera. Intergeneric graft combinations with x Fatshedera lizei included 11 species in five other genera. Schefflera arboricola scions grew more vigorously on Nothopanax and Polyscias rootstocks than on Schefflera root-stocks. The highest intergeneric graft compatibility scores for each genera included combinations with Schefflera. Plant propagation instructors may find these results useful in designing grafting exercises.
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НУРАЛИЕВ, М. С. "СТРУКТУРНОЕ РАЗНООБРАЗИЕ СОЦВЕТИЙ ВИДОВ РОДА SCHEFFLERA (ARALIACEAE) СЕВЕРНОГО ВЬЕТНАМА, "БОТАНИЧЕСКИЙ ЖУРНАЛ"." Ботанический журнал, no. 3 (2013): 321–36. http://dx.doi.org/10.1134/s123456781303004x.

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Исследование структуры синфлоресценций шести азиатских видов рода Schefflera s. l. выявило их высокое разнообразие в данной группе. Синфлоресценции изученных видов относятся к двум типам: метелка из элементарных соцветий и двойная кисть из элементарных соцветий. Элементарным соцветием в первом случае является открытый зонтик либо кисть, во втором — открытый зонтик (у некоторых видов — головка). Данные типы синфлоресценции отличаются друг от друга наличием терминальных элементарных соцветий на главной и боковых осях, осностью растения и ритмикой распускания цветков. Обоснована гипотеза о детерминированном характере развития синфлоресценций у видов рода Schefflera с двойной кистью. Показано, что для азиатских видов рода Schefflera с метелками из зонтиков характерно наличие в синфлоресценции одиночных цветков, расположенных под некоторыми из зонтиков, что делает строение этих элементарных соцветий промежуточным между зонтиком и кистью.
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Ye, Chang-Qing, Jia-Yi Zhang, Zhi-Cheng Ye, Mei-Tian Xiao, Xu-Dong Zhou, and Jing Ye. "A new lignan from Schefflera arboricola." Journal of Chemical Research 44, no. 9-10 (March 12, 2020): 532–35. http://dx.doi.org/10.1177/1747519820910383.

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A new lignan, arborlignan A, along with five known substances, neoechinulin A, 4-hydroxy-3,5-dimethoxybenzaldehyde, 3,3′-dimethoxy-4,4′-dihydroxystilbene, β-hydroxypropiovanillone, and coniferyl aldehyde, are isolated from Schefflera arboricola. Their structures are elucidated by mass spectrometry and nuclear magnetic resonance spectroscopy experiments and by comparison with literature data. These compounds are isolated from the genus Schefflera for the first time.
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Esser, Hans-Joachim. "Schefflera (Araliaceae) in Thailand becomes Heptapleurum." Thai Forest Bulletin (Botany) 49 (2021): 151–54. http://dx.doi.org/10.20531/tfb.2021.49.1.19.

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Following recent studies showing that Asian Schefflera should be treated under the separate genus Heptapleurum, the names for the Thai species belonging to this genus are listed. Two new combinations are proposed for S. bengalensis and S. poomae. For two species of Schefflera recognized, S. pueckleri and S. simulans, different epithets must be used under Heptapleurum, namely H. calyptratum and H. affine.
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Aysan, Y., M. Mirik, and F. Sahin. "First Report of Bacterial Leaf Spot Caused by Pseudomonas cichorii on Schefflera arboricola in Turkey." Plant Disease 93, no. 8 (August 2009): 848. http://dx.doi.org/10.1094/pdis-93-8-0848b.

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In late winter and spring of 2006 and 2008, leaf spots with yellow halos were observed on dwarf schefflera (Schefflera arboricola cvs. Gold Capella, Trinette, and Green Gold) that were grown as potted plants in two commercial ornamental greenhouses in Adana and Mersin, Turkey. Average disease incidence was assessed as 10% during the term of the study. Isolations were made from leaf spots symptoms on King's medium B. Bacteria consistently isolated from diseased tissues formed green fluorescent colonies on the medium. Ten representative bacterial strains were examined and found to be gram negative, rod shaped, and aerobic, levan, pectolytic, and arginine dihydrolase negative, and oxidase positive. They all induced a hypersensitive response in tobacco (Nicotiana tabacum cv. Samsun). All strains were identified as Pseudomonas cichorii with similarity indices of 79 to 99% based on fatty acid methyl ester (FAME) profiles determined by Sherlock Microbial Identification System software (TSBA 6 v. 6.00; Microbial ID, Newark, DE). Pathogenicity of the strains was confirmed on five dwarf schefflera plants by leaf tissue infiltration with bacterial suspensions (107 CFU ml–1) in sterile distilled water. P. cichorii NCPPB 3802 and sterile water were used as positive and negative controls, respectively. The same symptoms as those observed in the commercial greenhouses were observed on dwarf schefflera leaves within 12 to 15 days after inoculation. The bacteria were reisolated from the inoculated plants and identified as the same as the original strain by conventional tests and FAME analysis. Negative control plants remained disease free. Occurrence of bacterial leaf spot caused by P. cichorii on vegetable crops in Turkey (1,3) and dwarf schefflera in other countries (2) has been reported previously, but to our knowledge, this is the first report of the observation of P. cichorii on dwarf schefflera in Turkey. References: (1) Y. Aysan et al. Plant Pathol. 52:782. 2003. (2) A. R. Chase and D. D. Brunk. Plant Dis. 68:73, 1984. (3) F. Sahin et al. Acta Hortic. 695:93, 2005.
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Mthembu, X. S., F. R. Van Heerden, and G. Fouché. "Antimalarial compounds from Schefflera umbellifera." South African Journal of Botany 76, no. 1 (January 2010): 82–85. http://dx.doi.org/10.1016/j.sajb.2009.07.019.

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Dissertations / Theses on the topic "Schefflera"

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Fiaschi, Pedro. "Systematics and Biogeography of the Didymopanax group of Schefflera (Araliaceae)." VCU Scholars Compass, 2009. http://scholarscompass.vcu.edu/etd/23.

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Schefflera is the largest genus in the angiosperm family Araliaceae, with about 900 species, of which c. 300 belong to five subgeneric groups in the Neotropical region. Previous phylogenetic studies of Schefflera have been limited to a small number of species from this region, and very little is know about phylogenetic relationships in the Brazilian-centered Didymopanax group of this genus. Therefore, to gain a better understanding of the diversity and evolution of the Didymopanax group of Schefflera, I investigated the systematics of these plants in the broader context of the entire Neotropical clade. The main goals were (1) to investigate pollen diversity in Neotropical species of Schefflera; (2) to test the monophyly of these species; (3) to provide a taxonomic revision for species of the Didymopanax group of Schefflera; and (4) to investigate evolutionary relationships within the Didymopanax group. Pollen morphology exhibits an uneven variability across Neotropical Schefflera. For example, pollen characters support the distinctiveness of the Didymopanax group from all remaining groups. Moreover, S. tremula has a distinctive pollen morphology compared to remaining species of the Sciodaphyllum group. However, among the remaining groups of Neotropical Schefflera, pollen characters are less distinctive. Molecular phylogenetic analyses have confirmed the monophyly of the Neotropical species of Schefflera, and helped to identify four major clades. One of these clades includes subclades representing the Didymopanax and Crepinella groups, while another clade includes all species from groups Cotylanthes and Sciodaphyllum, excluding Schefflera tremula, a finding that corroborates pollen data. In the formal taxonomic revision of Didymopanax, 37 species are recognized, together with three insufficiently known species. The revision also includes updated species circumscriptions and nomenclatural adjustments for 26 names. Phylogenetic analyses among Didymopanax species recovered four morphologically and geographically coherent clades (Atlantic Forest, Imeri, Five-carpellate and Savannic clades), but their phylogenetic inter-relationships were generally weakly supported. Poorly resolved relationships in the Savannic clade suggests a rapid diversification in the campos rupestres vegetation, which accounts for the greatest species richness in the group. The presence of multiple Didymopanax lineages in the Amazonian and Atlantic forests corroborates that these regions may be composite biogeographic areas.
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Gostel, Morgan. "Evolutionary relationships in Afro-Malagasy Schefflera (Araliaceae) based on nuclear and plastid markers." VCU Scholars Compass, 2010. http://scholarscompass.vcu.edu/etd/122.

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The genus Schefflera is the largest in Araliaceae, with approximately 900 species. Recent studies have shown that Schefflera is polyphyletic and represents no fewer than five distinct clades, each corresponding to a specific geographic region including Asia, continental Africa and Madagascar, Melanesia, the Neotropics, and a small clade distributed throughout several islands in the insular Pacific Ocean. The Afro-Malagasy clade contains nearly 50 species distributed throughout tropical, sub-Saharan Africa, Madagascar, the Comoros, and the Seychelles islands. Previous studies have suggested that this group is monophyletic, identifying two smaller subclades within Afro-Malagasy Schefflera corresponding roughly to informal groups identified as “Meiopanax” and “Sciodaphyllum” on the basis of morphology. Using sequence data from nuclear rDNA spacers and plastid markers derived from 32 of the 48 currently circumscribed species of Afro-Malagasy Schefflera, this study tested the monophyly of Afro-Malagasy Schefflera and of each of its two proposed subclades. Trees based on this molecular data were used to examine patterns of morphological evolution and biogeography among species in the clade. Results support the monophyly of Afro-Malagasy Schefflera and both subclades, which correspond closely to “Meiopanax” and “Sciodaphyllum” which are herein referred to as Neocussonia and Astropanax, respectively. Additional interspecific relationships were examined, which provides evidence for hybridization among several species. Schefflera myriantha, the most widely distributed species of Afro-Malagasy Schefflera, is paraphyletic with respect to two other species, S. humblotiana and S. monophylla. Many morphological features historically used to distinguish species of Afro-Malagasy Schefflera appear to be evolutionarily labile, with a history of gains and losses (e.g., reduction in leaflet number, which occurs independently in both subclades). Biogeographic analyses suggest an African ancestry for the entire Afro-Malagasy Schefflera clade, and for both subclades, with two independent divergence events to Madagascar.
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Ludwig, Christine. "Zur Chemie und Pharmakologie der Saponine aus Dodonaea viscosa (L.) Jacq. und Schefflera venulosa (Wight et Arn.) Harms /." [S.l. : s.n.], 1985. http://www.gbv.de/dms/bs/toc/010005757.pdf.

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Anastácio, Maristela Rosália. "Estádio de maturação dos frutos, tratamentos pré-germinativos e variabilidade da emergência de plântulas de morototó (Schefflera morototoni)." Universidade Federal de Uberlândia, 2010. https://repositorio.ufu.br/handle/123456789/12125.

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The objective of this work was to evaluate the influence of the fruit maturation stage in the physical attributes and germination of Schefflera morototoni pyrenes subjected to pre-germination treatments. Fruits with green and purplish green coloration were collected from 14 individuals, pulped in running water, the hollow pyrenes were discarded after counting, together with those presenting retracted and oxidized endosperm, using the uniforms (with the greenish endosperm occupying the whole cavity of the pyrene). The experiment was conducted in completely randomized design in a 2 x 5 factorial (stages of fruit maturation and pre-germination treatments), with four repetitions in plots containing 25 pyrenes. For greater capacity and germination speed of the pyrenes, fruits should be harvested when they present a purplish green coloration, discarding those with hollow pyrenes, with retracted or oxidized endosperm. The germination capacity of the pyrenes with uniform endosperm varied between 50 and 60%, with the beginning of the process at about 40 days after sowing and extending for up to 60 days in vermiculite. Pulped pyrenes, dried and soaked in water at 60ºC for 5 minutes, followed by soaking in water at room temperature for 12 hours begin the germination process in less time, in relation to those pulped, dried, scarified and soaked for 6 hours. The fruit endocarp is permeable and rigid; however, it presents a natural opening when soaked. The objective was to evaluate the variability in seedling emergence measures of Schefflera morototoni from pyrenes of different individuals. Fruits of 14 individuals were pulped and pyrenes with uniform endosperm were selected. The experiment was conducted in completely randomized design with 14 treatments (individuals) and 11 repetitions in parcels containing 50 pyrenes with uniform endosperm treated by immersion in water at 60 ºC for 5 minutes and then soaked at room temperature for 12 hours. The substrate used was a mixture in proportion 2:1:1:1/2 (v/v) soil, commercial substrate Bioplant®, coarse sand and vermicompost, with pyrenes sown at 1 cm depth in expanded polystyrene trays, maintained in a nursery with 50% reduction in luminosity at average temperatures of 19.3ºC minimum and 30.2 ºC maximum and daily irrigation. Daily counting of seedlings evaluated capacity, time, rate, uniformity and synchrony of emergence, besides the distribution of frequency of emergence in relation to time. The emergence of seedlings is slow, irregular and asynchronous, taking more than 80 days for stabilization of the emergence. The percentage of seedlings can reach up to 57%, but even when the endosperm occupies the whole cavity of the pyrene and is greenish, the emergence of seedlings may not occur. There is variability in seedling emergence measurements from pyrenes of different Schefflera morototoni individuals.
CAPÍTULO II: O objetivo do trabalho foi avaliar a influência do estádio de maturação dos frutos nos atributos físicos e de germinação de pirênios de Schefflera morototoni submetidos a tratamentos pré-germinativos. Frutos com coloração verde e verde-arroxeada foram coletados de 14 indivíduos, despolpados em água corrente, descartando-se, após contabilização, os pirênios chochos, com endosperma retraído e oxidado, utilizando-se os uniformes (com endosperma esverdeado ocupando toda a cavidade do pirênio). O delineamento experimental foi o inteiramente casualizado em esquema fatorial 2 x 5 (estádios de maturação dos frutos e tratamentos pré-germinativos), com quatro repetições em parcelas contendo 25 pirênios. Verificou-se que para maior capacidade e velocidade de germinação dos pirênios, os frutos devem ser colhidos quando apresentarem coloração verde-arroxeada, descartando-se àqueles com pirênios chochos, endosperma retraído ou oxidado. A capacidade de germinação dos pirênios com endosperma uniforme varia entre 50 e 60%, com início do processo em cerca de 40 dias após semeadura, se estendendo por até 60 dias em vermiculita. Pirênios despolpados, secos e embebidos em água a 60oC por 5 minutos, seguida da embebição em água à temperatura ambiente por 12 horas iniciam o processo de germinação em menor tempo, em relação aos despolpados, secos, escarificados e embebidos por 6 horas. O endocarpo dos frutos é permeável e rígido, no entanto, apresenta abertura natural quando embebido. CAPÍTULO III: O objetivo foi avaliar a variabilidade nas medidas de emergência de plântulas de Schefflera morototoni provenientes de pirênios de diferentes indivíduos. Frutos de 14 indivíduos foram despolpados, selecionando-se pirênios com endosperma uniforme. O experimento de emergência foi conduzido em delineamento inteiramente casualizado com 14 tratamentos (indivíduos) e 11 repetições em parcelas contendo 50 pirênios com endosperma uniforme imersos em água a 60 ºC por 5 minutos e posteriormente embebidos em água destilada à temperatura ambiente por 12 horas. O substrato utilizado foi uma mistura na proporção 2:1:1:1/2 (v/v) de solo, substrato comercial Bioplant®, areia de textura grossa e vermicomposto, com pirênios semeados a 1 cm de profundidade em bandejas de poliestireno expandido, mantidas em viveiro com sombrite de 50% de redução luminosa e médias de temperaturas de 19,3 ºC a mínima e 30,2 ºC a máxima e irrigadas diariamente. Das contagens diárias das plântulas emergidas foram avaliadas medidas de capacidade, tempo, velocidade, uniformidade e sincronia de emergência, além da distribuição de frequência percentual de emergência em relação ao tempo. A emergência das plântulas é tardia, irregular e assíncrona, gastando mais de 80 dias para estabilização do estande. A porcentagem de plântulas emergidas pode atingir até 57%, porém mesmo quando o endosperma ocupa toda a cavidade do pirênio e está esverdeado, a emergência das plântulas pode não ocorrer. Há variabilidade nas medidas de emergência de plântulas quando obtidas de pirênios de indivíduos distintos de Schefflera morototoni.
Mestre em Agronomia
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Silveira, Henrique Cesar Pelicci. "Interação entre formigas, o membracideo Guayaquila xiphias (Hemiptera) e sua planta hospdeira Schefflera vinosa (Araliaceae) : o papel dos lipidios cuticulares na camuflagem quimica dos membracideos." [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/316185.

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Orientadores: Paulo Sergio Moreira Carvalho de Oliveira, Jose Roberto Trigo
Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Biologia
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Mestrado
Mestre em Ecologia
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Armelin, Renato Soares. "As dinâmicas de Schefflera angustissima (March.) Frodin (Araliaceae) e de Andira anthelmia (Vell.) March. (Fabaceae) na reserva de Morro Grande, São Paulo." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/41/41134/tde-11012006-090156/.

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A dinâmica de populações trata das variações, no tempo e no espaço, das densidades e tamanhos de populações. Estudos sobre a dinâmica de espécies arbóreas tropicais, mais especificamente, só ganharam notoriedade a partir da década de 1970, quando o risco de extinção de espécies de interesse econômico tornou-se premente. Como a destruição dos biomas brasileiros vem sendo progressiva e contínua, uma parcela significativa da diversidade encontra-se sob ameaça de extinção, particularmente na Floresta Ombrófila Densa Atlântica, cujos remanescentes correspondem a menos de 7,5 % de sua cobertura original. Os objetivos deste trabalho são: (1) descrever as dinâmicas populacionais de Schefflera angustissima (Araliaceae) e de Andira anthelmia (Fabaceae), (2) estabelecer suas relações com o clima e a vegetação e (3) investigar se existe risco de extinção local. As populações foram amostradas em 4 áreas de 0,25ha, em um remanescente de Floresta Ombrófila Densa Atlântica na região de São Paulo. Investigaram-se as relações de suas estruturas verticais e espaciais com a estrutura e a dinâmica da cobertura da vegetação. Seus ciclos de vida foram estudados e modelados. Foi investigada a influência de processos regulatórios. Suas dinâmicas foram estudadas com base em projeções de modelos matriciais determinísticos e estocásticos ambientais. Os riscos de extinção foram inferidos dos resultados destas projeções. Áreas com vegetação menos densa e sujeitas a maior influxo de energia luminosa parecem favorecer mais S. angustissima do que A. anthelmia. Ambas as populações estão sujeitas a processos regulatórios, mas estes pouco influenciam suas dinâmicas atuais. Em geral, S. angustissima apresentou desempenho superior ao de A. anthelmia. As duas populações mostraram-se sob risco de extinção segundo os modelos determinísticos, mas apenas A. anthelmia segundo os modelos estocásticos. Nos dois casos, sobrevivência e crescimento mostraram-se mais importantes do que a fecundidade, e os principais fatores responsáveis por mortes e retardo no crescimento das plantas foram o ataque de lianas lenhosas e a queda de galhos e de árvores mortas. Foram ainda encontradas evidências da presença de um “gargalo” no ciclo de vida de A. anthelmia, onde o crescimento de infantes está sendo tão restringido que estas plantas não estão conseguindo avançar em sua ontogenia. Aparentemente, esse gargalo resulta do ataque de insetos formadores de galhas. Incrementos plausíveis nas taxas de sobrevivência e de crescimento das plantas mostraram–se suficientes para reverter os riscos de extinção.
Population dynamics deals with variation in time and space in the density and abundance of populations. The studies about the dynamics of tropical rain forest tree species, in particular, have become popular only about 1970, when the extinction risks for species of economic interest became pressing. Because the Brazilian biomes are being destroyed progressive and continuously, a significant portion of their diversity is threatened, specially in the Atlantic Rain Forest; whose remnants enclose less than 7,5 % of its original cover. The objectives of this thesis are: (1) to describe the population dynamics of Schefflera angustissima (Araliaceae) and Andira anthelmia (Fabaceae), (2) to expose their relation to the climate and the vegetation and (3) to investigate whether they are under local extinction risks. The populations were sampled in four 0,25ha areas, within an Atlantic Rain Forest remnant in São Paulo region. The relations between the populations’ vertical and spatial structures and the vegetation structure and cover dynamics were investigated. Their life cycles were studied and modeled. The influences of regulatory processes were also investigated. Their dynamics were studied trough projections of deterministic and environmental stochastic matrix models. The extinction risks were inferred from these projections’ results. Sites where the vegetation is less dense and subject to a higher influx of luminous energy seem to favor more S. angustissima than A. anthelmia. Both populations are subject to regulatory processes, but these processes have little influence on their present dynamics. In general, S. angustissima showed a higher fitness than A. anthelmia. According to the deterministic models, both populations are under extiction risk, though only A. anthelmia is, according to the stochastic models. In both populations, survivorship and growth rates were more important than fecundity rates, and the major factors responsible for death and retardation of plants’ growth were the woody lianas attack and the fall down of dead trees and branches over the plants. There are also evidence of a “bottle neck” effect in the A. anthelmia’s life cycle, where the infants growth is being so restricted that these plants are not succeeding at advancing along their ontogeny. Apparently, this “bottle neck” effect results from the attack of gall forming insects. Reasonable increments in the plants’ survivorship and growth rates are enough to revert the populations’ extiction risks.
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Faßmann, Natalie. "Untersuchungen zur Variabilität der Ausbildung hyperdermaler Wasserspeichergewebe unter Berücksichtigung variegater Periklinalchimären." Doctoral thesis, Humboldt-Universität zu Berlin, Landwirtschaftlich-Gärtnerische Fakultät, 2008. http://dx.doi.org/10.18452/15771.

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Die Arbeit ist in drei Teile untergliedert: Die Struktur "Hypodermales Wasserspeichergewebe" wird unter anatomischen, ökomorphologischen und evolutionsbiologischen Gesichtspunkten betrachtet. Die Anwesenheit eines farblosen Hypoderms erschwert bei der Musteranalyse variegater Periklinalchimären die Bestimmung der Konstitution der L2. Variegate Periklinalchimären mit Hypodermbildung wurden auf die Möglichkeiten der Bestimmung der L2 hin untersucht. Es werden verschiedene Entstehungsformen von maskierenden Mustern und die noch nicht beschriebenen Ringzellen vorgestellt, die den Idiotyp der L2-bürtigen Schicht anzeigen können. Ringzellen sind die Zellen, die im Bereich der Schließzellen an den substomatären Interzellularraum grenzen. Sie bilden dabei einen Ring um die Schließzellen, der im Flächenschnitt zu erkennen ist. Hypodermale Wasserspeichergewebe sind hauptsächlich bei tropischen Arten verbreitet. Die xeromorphe Struktur kommt sowohl bei den epiphytischen Bromelien als auch bei den hygromorphen Schattenpflanzen des tropischen Regenwaldes vor. Die beiden Selektionsfaktoren Trockenheit und Lichtintensität werden als mögliche Einflussfaktoren auf die Hypodermbildung diskutiert. Beispiele dafür, dass der Faktor Licht auch einen modifikativen Einfluss auf die Differenzierung der Hypodermzellen zu haben scheint, werden vorgestellt. Die Struktur "Hypodermales Wasserspeichergewebe" ist sowohl bei Monokotylen als auch Dikotylen gleichermaßen verbreitet. Es wird daher vermutet, dass es sich um eine analoge Struktur handelt, die mehrmals voneinander unabhängig zu verschiedenen Zeiten bei verschiedenen Arten entstanden ist. Innerhalb einer Gruppe verwandter Arten konnte sie mithilfe der Homologiekriterien als homolog eingestuft werden.
This paper contains three different issues: The structure "hypodermal water storage tissue" is considered from the anatomical, the ecomorphological and evolutionary aspect. Because hypodermal layers are non-green, it is difficult to make a pattern analysis of variegated periclinal chimeras and to determine the constitution of L2. Variegated periclinal chimeras with hypodermal layers were examined to the possibilities of determining L2. Different origins of masking patterns and the non-yet described ring cells are presented. Both structures are able to show the L2-genotype. Ring cells are those cells bordering the intercellular space near the stomata. In a cut parallel to the surface the ring built by ring cells is seen. The hypodermal water storage tissue is mainly distributed among tropical species. The xeromorphic structure occurs both to the epiphytic bromeliads and to the hygromorphic shadow plants of the tropical rainforest. The environmental factors humidity and solar radiation are discussed as possible influences on the development of hypodermal layers. Examples for the apparent modifying influence of solar radiation on the development of hypodermal cells are presented. The structure "hypodermal water storage tissue" occurs both to monocots and dicots. That indicates that it is an analogues structure and that it evolved several times independent of each other in different species. Among a group of nearly related species it could be classified by the aid of the criteria of homology as a homologues structure.
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Alberti, Simone. "Analysis and Optimization of the Scheffler Solar Concentrator." DigitalCommons@CalPoly, 2014. https://digitalcommons.calpoly.edu/theses/1335.

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The Scheffler reflector is a new solar concentrator design which maintains a fixed focus while only having a single axis tracking mechanism. This design makes the construction and operation of high temperature solar concentrators accessible to developing nations. In this project, I wrote computer simulation codes to better understand the dynamics and the effect of deformation or deviations from ideal conditions in order to define necessary manufacturing and operational tolerances. These tools and knowledge drove the prototyping of new reflector concepts by myself and other students on my team. A fiberglass prototype was able to drive the cost of a reflector to sub-$50 and a wood reflector was manufactured with accessible materials and techniques used in boat building.
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Scheffler, Ayna [Verfasser]. "Elektrochemische und spektroelektrochemische Untersuchungen symmetrischer und unsymmetrischer Spiroverbindungen / Ayna Scheffler." Kassel : Universitätsbibliothek Kassel, 2012. http://d-nb.info/1020645601/34.

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Laskowsky, Alexandra Verfasser], and Michael [Akademischer Betreuer] [Scheffler. "Netzartige Präkursorschichten auf anorganischen Oberflächen / Alexandra Laskowsky. Betreuer: Michael Scheffler." Magdeburg : Universitätsbibliothek, 2015. http://d-nb.info/1084697270/34.

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Books on the topic "Schefflera"

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Scheffler, Wolfram Adalbert. Wolfram Adalbert Scheffler: Bilder und Zeichnungen. Berlin: Neuer Berliner Kunstverein, 1987.

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Scheffler, Axel. Axel Scheffler's Flip flap farm. Somerville, Massachusetts: Nosy Crow, an imprint of Candlewick Press, 2014.

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Scheffler, Axel. The scary monster. London: Nosy Crow, 2015.

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Scheffler, Axel. Pip and Posy: The little puddle. Somerville, Mass: Candlewick Press, 2011.

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Volker Scheffler. Volker Scheffler Himmel & Hölle: Sind Muslime die "besseren Christen"? Norderstedt/Deutschland: Herstellung & Verlag:Books on Demand, Norderstedt, 2008.

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Siegel, Harvey, ed. Reason and Education: Essays in Honor of Israel Scheffler. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5714-8.

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Scheffler, Axel. Look and say. London: Nosy Crow, 2015.

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Scheffler, Axel. Look and say. London: Nosy Crow, 2014.

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Scheffler, Axel. The little puddle. London: Nosy Crow, 2015.

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Michael, Krejsa, and Matelowski Anke, eds. "... das Wort, dem alle Mühe galt, die Kunst": Karl Scheffler (1869-1951). Berlin: Akademie der Künste, Archiv, 2006.

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Book chapters on the topic "Schefflera"

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Sreeja, Puthanpura Sasidharan, Karuppusamy Arunachalam, and Parimelazhagan Thangaraj. "Schefflera Genus (Araliaceae)." In Medicinal Plants, 193–222. Boca Raton : Taylor & Francis, 2018. | “A CRC title, part of the Taylor & Francis imprint, a member of the Taylor & Francis Group, the academic division of T&F Informa plc.”: CRC Press, 2018. http://dx.doi.org/10.1201/9781351046510-10.

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Sastry, K. Subramanya, Bikash Mandal, John Hammond, S. W. Scott, and R. W. Briddon. "Schefflera actinophylla (Umbrella tree)." In Encyclopedia of Plant Viruses and Viroids, 2183. New Delhi: Springer India, 2019. http://dx.doi.org/10.1007/978-81-322-3912-3_822.

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Sastry, K. Subramanya, Bikash Mandal, John Hammond, S. W. Scott, and R. W. Briddon. "Schefflera arboricola (Dwarf umbrella tree)." In Encyclopedia of Plant Viruses and Viroids, 2184–85. New Delhi: Springer India, 2019. http://dx.doi.org/10.1007/978-81-322-3912-3_823.

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Bussmann, Rainer W., Narel Y. Paniagua-Zambrana, and Grace N. Njoroge. "Schefflera volkensii (Harms) Harms Araliaceae." In Ethnobotany of the Mountain Regions of Africa, 1–5. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-319-77086-4_142-1.

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Lokho, Kreni, and Krishnamoorthy Devanathan. "Schefflera elliptica (Blume) Harms Araliaceae." In Ethnobotany of Mountain Regions, 1–6. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-14116-5_153-1.

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Bussmann, Rainer W., Narel Y. Paniagua-Zambrana, and Grace N. Njoroge. "Schefflera volkensii (Harms) Harms Araliaceae." In Ethnobotany of the Mountain Regions of Africa, 943–47. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-38386-2_142.

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Lokho, Kreni, and Krishnamoorthy Devanathan. "Schefflera elliptica (Blume) Harms Araliaceae." In Ethnobotany of Mountain Regions, 977–82. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-38389-3_153.

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Holma, Katariina. "Scheffler." In International Handbook of Philosophy of Education, 407–16. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-72761-5_34.

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Parsons, David. "Scheffler’s Inscriptionalism." In Theories of Intensionality, 163–83. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-2484-9_12.

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Reichert, Ernst Otto. "Angelus Silesius: Und Scheffler redet noch!" In Kindlers Literatur Lexikon (KLL), 1–2. Stuttgart: J.B. Metzler, 2020. http://dx.doi.org/10.1007/978-3-476-05728-0_5823-1.

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Conference papers on the topic "Schefflera"

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Sinha, Kushagra, Olutosin C. Fawole, and Massood Tabib-Azar. "Non-invasive monitoring of electrical parameters of Schefflera arboricola leaf." In 2015 IEEE Sensors. IEEE, 2015. http://dx.doi.org/10.1109/icsens.2015.7370247.

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Noor-Syaheera, M. Y., T. Noraini, and A. P. Aida-Shafreena. "Systematic significance of midrib vascular bundles in some Schefflera Spreng (Araliaceae) species." In THE 2014 UKM FST POSTGRADUATE COLLOQUIUM: Proceedings of the Universiti Kebangsaan Malaysia, Faculty of Science and Technology 2014 Postgraduate Colloquium. AIP Publishing LLC, 2014. http://dx.doi.org/10.1063/1.4895293.

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Xie, Chunjuan, Jian Li, and Jiaochan Zhong. "Impact of Short-Term Elevated CO2 on Absorption of carbonyl compounds by Schefflera Octophylla and Chamaedorea Elegans." In 2016 5th International Conference on Sustainable Energy and Environment Engineering (ICSEEE 2016). Paris, France: Atlantis Press, 2016. http://dx.doi.org/10.2991/icseee-16.2016.130.

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Mellalou, Abderrahman, Abdelkader Outzourhit, Abdelaziz Bacaoui, and Habiba Qaisari. "Design Methodologies of Scheffler Concentrators." In 2019 7th International Renewable and Sustainable Energy Conference (IRSEC). IEEE, 2019. http://dx.doi.org/10.1109/irsec48032.2019.9078309.

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Sanga, Praveen James, A. Kumar, and K. S. Mishra. "Performance Evaluation of Scheffler Concentrator." In EuroSun2016. Freiburg, Germany: International Solar Energy Society, 2016. http://dx.doi.org/10.18086/eurosun.2016.07.01.

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Erick Alfred Dib and Flávio Augusto Sanzovo Fiorelli. "Scheffler paraboloidal concentrator image Analysis." In 23rd ABCM International Congress of Mechanical Engineering. Rio de Janeiro, Brazil: ABCM Brazilian Society of Mechanical Sciences and Engineering, 2015. http://dx.doi.org/10.20906/cps/cob-2015-0893.

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Selamat, Ahmad, Yahya Awang, Mahmud T. M. Mohamed, Zakaria Wahab, Mohammad Osman, Kamel Ariffin Mohd Atan, and Isthrinayagy S. Krishnarajah. "Use Of Absolute Function And Its Associates In Formation And ‘Redevelopment’ Of Mathematical Models In Some Plant-Related Quantitative Physiology: Salinity Effects On Leaf Development Of Schefflera arboricola And Harvest Index In Rice." In INTERNATIONAL CONFERENCE ON MATHEMATICAL BIOLOGY 2007: ICMB07. AIP, 2008. http://dx.doi.org/10.1063/1.2883838.

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Dib, E. A., and F. A. S. Fiorelli. "Analysis of the image produced by Scheffler paraboloidal concentrator." In 2015 5th International Youth Conference on Energy (IYCE). IEEE, 2015. http://dx.doi.org/10.1109/iyce.2015.7180746.

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van Rooyen, De Wet, Anna Heimsath, Peter Nitz, and Werner Platzer. "An Optical Model of the Fix-Focus Scheffler Reflector." In ISES Solar World Congress 2011. Freiburg, Germany: International Solar Energy Society, 2011. http://dx.doi.org/10.18086/swc.2011.28.30.

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Chandak, Ajay, and Sunil Somani. "Industrial Oven Powered with a Pair of Scheffler Solar Reflectors." In ISES Solar World Congress 2011. Freiburg, Germany: International Solar Energy Society, 2011. http://dx.doi.org/10.18086/swc.2011.23.03.

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Reports on the topic "Schefflera"

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Nene, Anita A., Solaisamy Ramachandran, and Sivalingam Suyambazhahan. Design and Analysis of Solar Thermal Energy Storage System for Scheffler Solar Concentrator. "Prof. Marin Drinov" Publishing House of Bulgarian Academy of Sciences, October 2019. http://dx.doi.org/10.7546/crabs.2019.10.03.

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