Relevant bibliographies by topics / Pectinida

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Academic literature on the topic 'Pectinida'

Author: Grafiati
Published: 3 June 2025
Last updated: 20 July 2025

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Journal articles on the topic "Pectinida"

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Fletcher, Chris, and Mary E. Spencer Jones. "The genome sequence of the variegated scallop, Mimachlamys varia (Linnaeus, 1758)." Wellcome Open Research 8 (July 14, 2023): 307. http://dx.doi.org/10.12688/wellcomeopenres.19643.1.

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We present a genome assembly from an individual Mimachlamys varia (the variegated scallop; Mollusca; Bivalvia; Pectinida; Pectinidae). The genome sequence is 975.4 megabases in span. Most of the assembly is scaffolded into 19 chromosomal pseudomolecules. The mitochondrial genome has also been assembled and is 21.78 kilobases in length.
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Li, Fengping, Yu Zhang, Tao Zhong, et al. "The Complete Mitochondrial Genomes of Two Rock Scallops (Bivalvia: Spondylidae) Indicate Extensive Gene Rearrangements and Adaptive Evolution Compared with Pectinidae." International Journal of Molecular Sciences 24, no. 18 (2023): 13844. http://dx.doi.org/10.3390/ijms241813844.

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Different from the diverse family Pectinidae, the Spondylidae is a small group with a single genus that shares the sedentary life habit of cementing themselves to the substrate. However, little information related to the genetic diversity of Spondylidae has been reported. In the present study, the complete mitochondrial genomes of Spondylus versicolor and S. spinosus were sequenced and compared with those of pectinids. The mtDNA of S. versicolor and S. spinosus show similar patterns with respect to genome size, AT content, AT skew, GC skew, and codon usage, and their mitogenomic sizes are longer than most pectinid species. The mtDNA of S. spinosus is 27,566 bp in length, encoding 13 protein-coding genes, 22 transfer RNA genes, and 2 ribosomal RNA genes, while an additional tRNA-Met was found in the mtDNA of S. versicolor, which is 28,600 bp in length. The monophylies of Spondylidae and Pectinidae were well supported, but the internal relationships within Pectinidae remain unresolved due to the paraphyly of the genus Mimachlamy and the controversial position of the tribe Aequipectinini. The gene orders of S. versicolor and S. spinosus are almost identical but differ greatly from species of the Pectinidae, indicating extensive gene rearrangements compared with Pectinidae. Positive selection analysis revealed evidence of adaptive evolution in the branch of Spondylidae. The present study could provide important information with which to understand the evolutionary progress of the diverse and economically significant marine bivalve Pectinoidea.
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Carter, Joseph G., and Michael Hautmann. "Shell microstructure of the basal pectinid Pleuronectites laevigatus: implications for pectinoid phylogeny (Mollusca: Bivalvia: Pteriomorphia)." Journal of Paleontology 85, no. 3 (2011): 464–67. http://dx.doi.org/10.1666/10-094.1.

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New shell microstructure data for the Triassic pectinid Pleuronectites reinforce shell morphological data suggesting that its family Pectinidae was derived from the superfamily Aviculopectinoidea and not from the Pernopectinidae-Entolioidesidae-Entoliidae clade. This would make the superfamily Pectinoidea, as defined by recent authors, polyphyletic. This would also imply that alivincular-alate ligaments evolved independently in the Pernopectinidae-Entolioidesidae-Entolidae and Pectinidae clades.
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Schein, Elisabeth. "A new deep­sea pectinid bivalve from thermal vents of Manus back­arc Basin (south­western Pacific), Sinepecten segonzaci n. gen., n. sp. (Pectinoidea: Pectinidae), and its relationships with the genera Bathypecten and Catillopecten." Zootaxa 1135 (December 31, 2006): 1–27. https://doi.org/10.5281/zenodo.171941.

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Schein, Elisabeth (2006): A new deep­sea pectinid bivalve from thermal vents of Manus back­arc Basin (south­western Pacific), Sinepecten segonzaci n. gen., n. sp. (Pectinoidea: Pectinidae), and its relationships with the genera Bathypecten and Catillopecten. Zootaxa 1135: 1-27, DOI: 10.5281/zenodo.171941
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Dijkstra, H. H., and R. N. Kilburn. "The family Pectinidae in South Africa and Mozambique (Mollusca: Bivalvia: Pectinoidea)." African Invertebrates 42 (December 31, 2001): 263–321. https://doi.org/10.5281/zenodo.7910445.

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Dijkstra, Henk H., and Philippe Maestrati. "New species and new records of bathyal living Pectinoidea (Bivalvia: Propeamussiidae: Pectinidae) from the Southwest Pacific." Zoosystema 35, no. 4 (2013): 469–78. https://doi.org/10.5252/z2013n4a1.

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Dijkstra, Henk H., Maestrati, Philippe (2013): New species and new records of bathyal living Pectinoidea (Bivalvia: Propeamussiidae: Pectinidae) from the Southwest Pacific. Zoosystema 35 (4): 469-478, DOI: 10.5252/z2013n4a1, URL: http://dx.doi.org/10.5252/z2013n4a1
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Biakov, A. S. "A New Family and Genus of Late Permian Pectinids of the Boreal Superrealm (Pectinida: Voluceropectinidae: Voluceropecten)." Paleontological Journal 58, no. 2 (2024): 151–59. http://dx.doi.org/10.1134/s0031030123600257.

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Dijkstra, Henk H., and Philippe Maestrati. "Pectinoidea (Mollusca, Bivalvia, Propeamussiidae, Cyclochlamydidae n. fam., Entoliidae and Pectinidae) from the Vanuatu Archipelago." Zoosystema 34, no. 2 (2012): 389–408. https://doi.org/10.5252/z2012n2a12.

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Dijkstra, Henk H., Maestrati, Philippe (2012): Pectinoidea (Mollusca, Bivalvia, Propeamussiidae, Cyclochlamydidae n. fam., Entoliidae and Pectinidae) from the Vanuatu Archipelago. Zoosystema 34 (2): 389-408, DOI: 10.5252/z2012n2a12, URL: http://dx.doi.org/10.5252/z2012n2a12
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Dijkstra, Henk H., and Alan G. Beu. "Living Scallops of Australia and Adjacent Waters (Mollusca: Bivalvia: Pectinoidea: Propeamussiidae, Cyclochlamydidae and Pectinidae)." Records of the Australian Museum 70, no. 2 (2018): 113–330. https://doi.org/10.3853/j.2201-4349.70.2018.1670.

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Dijkstra, Henk H., Beu, Alan G. (2018): Living Scallops of Australia and Adjacent Waters (Mollusca: Bivalvia: Pectinoidea: Propeamussiidae, Cyclochlamydidae and Pectinidae). Records of the Australian Museum (Rec. Aust. Mus.) 70 (2): 113-330, DOI: 10.3853/j.2201-4349.70.2018.1670, URL: http://dx.doi.org/10.3853/j.2201-4349.70.2018.1670
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Mahdipour Haskouei, Fereshteh, Ali Bahrami, Mehdi Yazdi, and Francisco J. Vega. "Review of Mio-Pliocene pectinids and ostracods from Minab region and Qeshm Island, Persian Gulf, southern Iran." Boletín de la Sociedad Geológica Mexicana 77, no. 1 (2025): A251224. https://doi.org/10.18268/bsgm2025v77n1a251224.

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The present study investigates the pectinid bivalve record characterizing the Mio-Pliocene of Mishan and Aghjari formations in Qeshm Island of the Persian Gulf and Minab region of Makran Basin (Hormozgan Province). Thick-bedded deposits of highly accumulated levels of epifaunal free-lying pectinids were investigated in terms of paleoecology and taphonomy. Eight species of the family Pectinidae (Bivalvia) and nine species of Ostracoda are reported from the Direstan rural area, Qeshm Island, Persian Gulf, Southern Iran. Most bivalve shells display extreme taphonomic features such as breakage, bioerosion, encrustation, disarticulation, and abrasion. Encrusting Cheilostomata bryozoans, as well as polycheata worms, encrust pectinid valves; Langian (Middle Miocene) Cheilostomata are identified as Microporella berningi. The studied pectinids are represented by the following species: Pecten aff. rotundatus, Pecten cf. subarcuatus, Flabellipecten piramidesensis, Argopecten gratus, Chlamys varia, Chlamys multistriata, C. actinodes, and Talochlamys articulata. Ostracoda were also collected from two more outcrops in Qeshm Island (Kendaloo and Star Valley) and one outcrop of Minab region (Bemani section). The studied ostracods are: Alocopocythere kendengensis, Actinocythereis iraqensis, Loxoconcha hamrinensis, Neomonoceratina iniqua, Bairdoppilata triangulata, Bairdia rafidainensis, Hermanites transversicoststs, Costa tricostata, and Cytherelloidea hamrinensis
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Dissertations / Theses on the topic "Pectinida"

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Arroyo, Orbegoso Alexis Germán. "Producción de Enzimas Pectinasas por Actinomycetos en Cultivo Sumergido Utilizando Pectina y Cáscara de Naranja." Bachelor's thesis, Universidad Nacional Mayor de San Marcos, 2002. https://hdl.handle.net/20.500.12672/2596.

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El objetivo de esta investigación fue seleccionar las condiciones que permitan la producción de enzimas pectinasas, a partir de cáscaras de naranja, empleando Actinomyces naeslundii. En la primera fase, se determinaron las condiciones de pH , temperatura, agitación y aireación, para un buen crecimiento del microorganismo. En la segunda, se empleó el diseño experimental Plackett-Burman, mediante la evaluación de ocho nutrientes, con dos niveles de variación. Los nutrientes fueron: cáscara de naranja, sulfato de amonio, úrea, sulfato ferroso, cloruro de calcio, cloruro de sodio, sulfato de magnesio y carbonato de sodio, utilizándose matraces Erlenmeyer con 150 mL de medio experimental pH 7.00 a 37 ºC y 300 rpm por 5 días. En la tercera fase, fue realizada la optimización del medio de cultivo experimental, siguiendo el diseño de Box-Benhken, en el que hubo evaluación de las concentraciones de cáscara de naranja, sulfato de amonio y sulfato ferroso en tres niveles. Con los resultados obtenidos, se realizó el análisis de regresión múltiple. Los cálculos y gráficos estadísticos fueron ejecutados con el software Statistical 2.1. obteniéndose la máxima producción de enzimas, con las siguientes concentraciones: cáscara de naranja 16.7 g / L, sulfato de amonio 5 g /L y sulfato ferroso 0.013 g / L, obteniéndose 0.65 U.I. / mL de actividad enzimática, en tres días de biotransformación.<br>The objective of this research was to choice the conditions that they permit to optimize the pectinasas enzymes production using orange skins and Actinomyces naeslundii; on first phase was used qualitative techniques for to determinate the conditions of pH, cultivation temperature, agitation and aeration for a good growth microorganism. On the second phase was used the Plackett- Burman design through the investigation of eight nutrients with two variation levels; The eight nutrients was: oranges skin, ammonium sulfate, urea, ferrous sulfate, calcium chloride, sodium chloride, magnesium sulfate y sodium carbonate. It was used Erlenmeyer flask with 150 mL of experimental medium pH 7, to 37 ºC, agitation to 300 rpm for 5 days. Third phase of optimization was developed through Box- Benhken design, oranges skin, ammonium sulfate and ferrous sulfate concentration were evaluated on three level. It was realized a multiple regression analyses with the three variables found previously . calculus and graphics were developed with Statistical 2.1 software. Optimum Parameters were: oranges skin 16.7 g / L, ammonium sulfate 5 g / L and ferrous sulfate 0.013 g / L. it was obtained 0.65 UI / mL of enzymatic activity in three days of biotransformation.<br>Tesis
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Wendt, Nestor Cubas. "Análise do transcriptoma da Vieira pata-de-leão Nodipecten nodosus (Linnaeus, 1758)." reponame:Repositório Institucional da UFSC, 2017. https://repositorio.ufsc.br/xmlui/handle/123456789/176807.

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Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Biológicas, Programa de Pós-Graduação em Bioquímica, Florianópolis, 2017.<br>Made available in DSpace on 2017-06-27T04:23:30Z (GMT). No. of bitstreams: 1 345983.pdf: 6571309 bytes, checksum: eff889a321cea8a94cbde6e36c5b4a0d (MD5) Previous issue date: 2017<br>Os ecossistemas costeiros fornecem bens e serviços valiosos. Entretanto, a maioria destes ecossistemas já apresentam impactos antropogênicos. Historicamente os ecossistemas costeiros são alvo do descarte de resíduos industriais, agrícolas e de efluentes urbanos. Esta contaminação, além de gerar riscos à saúde humana, modifica a ecologia dos ecossistemas marinhos. Esta dissertação está dividida em dois capítulos. O primeiro trata do sequenciamento e caracterização do transcriptoma de glândula digestiva de vieiras da espécie Nodipecten nodosus. As leituras passaram por verificação de qualidade e foram montadas através de três diferentes métodos. A montagem de melhor qualidade (Velvet k = 45) apresentou um tamanho de contig N50 de 2.301 pares de base (pb), compreendendo 76.861 transcritos. Destes,33,72% foram anotados em bancos de dados públicos. Diversos transcritos de genes envolvidos na biotransformação de xenobióticos e com atividade antioxidante foram identificados. No segundo capítulo foram apresentados os resultados da classificação dos 33 transcritos citocromos P450 (CYP) buscados no transcriptoma de glândula digestiva da vieira N. nodosus. Seis novas famílias CYP foram identificadas. Além disso, a proteína CYP30E1 foi caracterizada estruturalmente, através de métodos computacionais. As sequências analisadas apresentaram, em geral, os motivos característicos desta superfamília conservados. A caracterização do CYP30E1 revela uma altas emelhança com o CYP3A4 humano, indicando funções semelhantes no metabolismo de alguns xenobióticos. Esta dissertação apresenta importantes contribuições na caracterização do transcriptoma da vieira N. nodosus e de seus transcritos CYP.<br><br>Abstract : Coastal ecosystems provide valuable goods and services. However, most of these ecosystems already show anthropogenic impacts. Historically, coastal ecosystems have been subject to the disposal of industrial, agricultural and urban wastes. This contamination, in addition to producing risks to human health, modifies the marine ecosystem's ecology. This work is divided into two chapters. The first deals with the sequencing and characterization of the transcriptome of the digestive gland of scallops from the species N. nodosus. High-throughput sequencing reads went through quality checking and were assembled through three different methods. The assembly with the highest quality (Velvet k = 45) had a N50 contig size of 2,301 base pairs, comprising 76,861 transcripts. Of these, 33.72% were annotated in public databases. Several transcripts from genes involved in xenobiotic transformation or that had antioxidant activity were identified. In the second chapter, the results of the classification of 33 cytochrome P450 transcritos, searched in the digestive gland transcriptome of the scallop N. nodosus, were presented. Six new CYP families were identified. In addition, the protein CYP30E1 was characterized structurally, by computational methods. The analyzed sequences presented, in general, well conserved motifs from this superfamily. The characterization of the CYP30E1 revealed a high similarity with the human CYP3A4, indicating similar function in the metabolism of xenobiotics. This dissertation produced important contributions in the transcriptome characterization of the scallop N.nodosus and its CYP transcripts.
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Lee, J. B. "The development and application of a stereological gonad index used to study the reproductive cycles of Chlamys islandica (O.F. Muller) and Chlamys opercularis (L.) (Bivalvia: Pectinacea)." Thesis, Heriot-Watt University, 1985. http://hdl.handle.net/10399/1650.

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Heipel, Diana Angela. "An investigation of population differentiation in the scallop Pecten maximus (Bivalvia: Pectinidae) using molecular techniques." Thesis, University of Liverpool, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263793.

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Giachetti, B. Silvana, and de Abram Ana Pastor. "Estudio fitoquímico de la Hyptis pectinata (L.) Point." Revista de Química, 2013. http://repositorio.pucp.edu.pe/index/handle/123456789/99477.

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Mwafongo, Elizabeth. "Morphological study of Schizaea Pectinata (L.) Sw. (Schizaeaceae)." Bachelor's thesis, University of Cape Town, 2000. http://hdl.handle.net/11427/23941.

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Morphometrics was used to study variation in Schizeae pectinata as previous study showed that material originating from the summer rainfall area of South Africa differ in several aspects from that originating from the winter rainfall area. The plant has a simple structure and consequently spore, stoma and sporangia sizes, as well as the number per lamina was studied to determine if the species can be subdivided into two groups, e summer and e winter rainfall group, as was previously hypothesised. Univariate and bivariate methods were used to display the extent of variation within the species. Univariate analysis reflect variability of spore and stomata size, and the number of pinna pairs per lamina. Statistical analyses showed that interpopulation variation for these characters are often highly significant. Phonetic methods were used in the analyses of the data set and shows continuous variation in this species. This continuous variation in Schizaea pectinata could be linked to a phenotypic response to environmental differences between the two regions.
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Holbach, Marine. "La sensibilité des larves de pectinidés aux conditions d'élevage : le flux ouvert comme alternative aux mortalités massives." Thesis, Brest, 2014. http://www.theses.fr/2014BRES0128/document.

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Dans de nombreux pays, l’aquaculture de pectinidés dépend aujourd’hui du succès de la production contrôlée de juvéniles. Néanmoins, les fortes variations des taux d’éclosion des oeufs et de la survie larvaire, enregistrées à ce jour, rendent cette production imprévisible. Les élevages larvaires en flux ouvert de coquilles Saint-Jacques (Pecten maximus) ont été développés en Norvège et présentent des résultats prometteurs. Malheureusement, les rendements de production encore faibles et l’impossibilité de travailler à fortes densités restent un frein majeur au développement de cette technique. En France, une technique en flux-ouvert, en petit volume (5 L), et à forte densité (≤ 300 larves mL-1) a été développée pour les ostréidés. Des expériences préliminaires visant à décliner ce système d’élevage aux larves de P. maximus se sont avérées infructueuses : retard de croissance et forte mortalité en quelques jours. Il est reconnu que les larves de pectinidés doivent faire face à des contraintes diverses en écloserie : bactériologiques, physiologiques et environnementales. Elles sont également plus sensibles que les larves des autres espèces de bivalves comme par exemple l’huître japonaise (Crassostrea gigas). Il apparait donc nécessaire aujourd’hui d’identifier plus clairement l’origine des phénomènes perturbant le bon développement des larves en flux ouvert afin d’améliorer la qualité des élevages et les rendements larvaires. Grâce à l’étude et à la compréhension des mécanismes physiologiques impliqués dans la lutte contre le stress des larves de P. maximus en flux ouvert, ce projet de doctorat donne des clés permettant d’améliorer cette technique d’élevage tout en limitant l’utilisation de produits chimiques en milieu contrôlé<br>In many countries, aquaculture of pectinids depends on the success of artificial spat production in hatchery. This production is always unpredictable due to the variability of hatching rate and larval survival. Flow-through larval rearing systems were developed in Norway for the King scallop Pecten maximus and showed promising results. Unfortunately the system needs to be optimized since the larval yields and the densities used are still relatively low. In France, a small-scale (5 L) and high-density (≤ 300 larva mL-1) flow-through larval rearing system was successfully developed for oysters. First trials in such system and in similar conditions with P.maximus failed as we registered slower growth and high mortality rate in only a few days. It is known that pectinids larvae are more sensitive to environmental conditions than the oyster Crassostrea gigas, for example.Nowadays, it is important to identify and to understand the phenomena disturbing larval development in flowthrough system to improve larval quality and production yields. This doctoral project provided some indications how improving P. maximus flowthrough rearing system while limiting the use of antibiotic through a better understanding the physiological mechanisms involved in the larval response to a stressful environment
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Bierhalz, Andréa Cristiane Krause 1981. "Confecção e caracterização de biofilmes ativos à base de pectina BTM e pectina BTM/alginato reticulados com cálcio." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266966.

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Orientador: Theo Guenter Kieckbusch<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-16T09:52:42Z (GMT). No. of bitstreams: 1 Bierhalz_AndreaCristianeKrause_M.pdf: 2842843 bytes, checksum: cab45fbde17a0c38ebace1685ac8ac68 (MD5) Previous issue date: 2010<br>Resumo: Pectinas e alginatos são polímeros naturais com grande potencial de aplicação no desenvolvimento de filmes biodegradáveis, por serem materiais renováveis e obtidos a partir de diversas fontes a baixo custo. Atualmente, diversos estudos estão voltados ao desenvolvimento de tecnologia que controle o crescimento indesejável de microorganismos, pelo uso de embalagens ativas. Na presente pesquisa, foram desenvolvidos filmes simples de pectina e filmes compostos de pectina e alginato em diferentes proporções, reticulados com cálcio e contendo glicerol como plastificante. Foi avaliada a influência das concentrações de cálcio e do plastificante e do tempo de reticulação sobre as propriedades características dos filmes. A adição de natamicina como agente antimicrobiano também foi investigada. Os filmes foram preparados por casting, isto é, alíquotas da solução filme-formadora foram vertidas em moldes de acrílico e submetidas à gelificação e secagem. Devido ao alto poder gelificante do Ca++, filmes com baixo grau de reticulação foram inicialmente confeccionados (1º estágio). Estes préfilmes foram submetidos a uma reticulação complementar com imersão em uma solução mais concentrada de íons cálcio contendo plastificante. O alginato e a pectina mostraram-se compatíveis em todas as proporções, resultando em filmes com bom aspecto visual. O aumento da concentração de alginato diminuiu a solubilidade em água e o grau de intumescimento e aumentou a espessura, a resistência à tensão, a flexibilidade, a opacidade e a temperatura de transição vítrea dos filmes. Filmes pré-reticulados com 1% CaCl2.2H2O (13,60 mg Ca++/g biopolímero) na solução do 1º estágio, imersos durante 20 minutos em uma solução contendo 5% CaCl2.2H2O e 3% glicerol (2º estágio) apresentaram um compromisso entre alta resistência mecânica, boa aparência e baixa solubilidade em água. Esta formulação foi selecionada para a confecção dos filmes ativos contendo natamicina. A adição da natamicina provocou um aumento na permeabilidade ao vapor de água, na solubilidade em água e na opacidade, e uma redução na tensão na ruptura em relação aos filmes sem antimicrobiano. Determinações experimentais da massa de natamicina liberada em ensaios nos quais os filmes eram imersos em água apresentaram bom ajuste ao modelo difusional da segunda Lei de Fick, com valores de difusividade efetiva variando entre 9,53.10-9 e 9,22.10-12 cm2/s. A difusividade aumentou com a espessura e diminuiu com o aumento da concentração de alginato no filme<br>Abstract: Pectin and alginate are natural polymers with potential applications in the development of biodegradable package films, since they can be obtained at low cost from a large variety of renewable sources. There is a growing interest concerning the control of microbial activity in prepared food using active packaging. In this work, single and composite films based on alginate and pectin crosslinked with calcium ions and containing glycerol as plasticizer were prepared. The influence of calcium and glycerol concentrations and of the time of reticulation on the film characteristics was evaluated and the addition of natamycin as an active agent was investigated. The strong gelling power of Ca++ ions hinders smooth casting procedures so that a film with low degree of reticulation has to be initially confectioned by casting (1st stage). These pre-films are further crosslinked in a second contact with a more concentrated Ca++ solution containing plasticizer (2nd stage). Alginate and pectin were compatible in all proportions studied resulting in visually attractive films. Increasing the alginate concentration decreased film solubility in water and the swelling degree and increased the thickness, resistance to tensile stress, flexibility, water vapor permeability, opacity and glass transition temperature. Films pre-reticulated with 1% CaCl2.2H2O (13.60 mg Ca++/g biopolymer) in the solution of the 1st stage, immersed for 20 minutes in a 5% CaCl2.2H2O and 3% glycerol solution (2nd stage) showed a good compromise between high mechanical resistance, attractive appearance and low solubility in water. This formulation was selected for the manufacture of active films containing natamycin. Addition of natamycin promoted an increase in water vapor permeability, solubility in water and opacity and decreased the tensile strength when compared to films without the added anti-microbial agent. Experimental data of mass of natamycin released by immersion of the film in water were well fitted to Fick's second law diffusional model, with effective diffusivity values ranging from 9.53. 10-9 e 9.22.10-12 cm2/s. The diffusivity increased with the thickness and decreased with alginate concentrations in the film<br>Mestrado<br>Engenharia de Processos<br>Mestre em Engenharia Química
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Andrade, Juliana Ramos de. "Eletrólitos poliméricos géis à base de pectina." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/75/75131/tde-08102010-104357/.

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Esta dissertação apresenta a preparação e caracterização de eletrólitos poliméricos géis (EPGs) a partir de pectina comercial GENU&reg;, plastificada com glicerol e dopada com perclorato de lítio. O objetivo é a utilização de uma nova matéria-prima para a obtenção de eletrólitos poliméricos substituindo os polímeros sintéticos. A pectina é um polímero natural presente nas plantas; quimicamente é um polímero heterogêneo, e estruturalmente, é constituída unidades repetidas de (1&rarr;4)-&alpha;-D-ácido galacturônico. Os eletrólitos foram preparados usando como sal LiClO4 (0,24 g ou 30 [O]/[Li]), e 0,6 g de pectina com diferentes quantidades de glicerol (0 g - 2,0 g; 0% - 70%) como plastificante. Os filmes foram caracterizados por espectroscopia de impedância, difração de raios-X, UV-Vis, FT-IR, análises térmicas (DSC e TG). Os melhores resultados foram apresentados pelos filmes constituídos com 70% de glicerol e 30 [O]/[Li] e 68% de glicerol e 0,24 g de LiClO4. .Os filmes com 68% de glicerol apresentam valores de condutividade iônica de 1,61x10-4 S.cm-1 em temperatura ambiente aumentando para 1,72x10-3 S.cm-1 à 80&deg;C, e uma transmitância de 80% no intervalo do visível. Os valores da energia de ativação para este filme é em torno de 37 KJmol-1. Também foi verificada a estabilidade eletroquímica em uma faixa de potencial que varia entre -1,5 a +1,5V. Os filmes com 70% de glicerol apresentam os melhores valores de condutividade iônica de 3,08x10-4 S.cm-1 em temperatura ambiente para 2,94x10-3 S.cm-1 à 80&deg;C, e energia de ativação em torno de 35 KJmol-1, e transmitância de 75% no intervalo do visível. Os resultados obtidos indicaram que os eletrólitos a base de pectina são promissores para aplicações em dispositivos opto-eletroquimicos.<br>This work presents the preparation and characterization of pectin GENU&reg;-based gel polymeric electrolytes (GPEs), plasticized with glycerol and doped with lithium perchlorate. The use of a new raw material for the production of polymeric electrolytes, as substitutes of synthetic polymers is the proposal of this work. Pectin is a natural polymer found in plants. This polymer is chemically heterogeneous and structurally, are composed of a main linear chain of (1&rarr;4)-&alpha;-D-galacturonic acid. The electrolytes were prepared using salt as LiClO4 (0.24 g or 30 [O]/[Li]) to 0.6 g of pectin and with different amounts of glycerol (0-2.0g, 0-70%) as plasticizer. The films were characterized by impedance spectroscopy, X-ray diffraction, UV-Vis, FT-IR, thermal analysis (DSC and TG). The best results were obtained with films containing 70% of glycerol and 30 [O]/[Li] and 68% of glycerol and 0.24 g LiClO4. The films with 68% of glycerol exhibit ionic conductivity values of 1.61 x10-4 S.cm-1 at room temperature with increase to1.72 x10-3 S.cm-1 at 80&deg;C, and showed a transmittance of 80% in the visible range. The values of activation energy for this sample is around 37 kJmol-1. It was also observed the electrochemical stability in the potential range of -1.5 to +1.5 V. The films with 70% of glycerol showed best ionic conductivity values of 3.08 x10-4 S.cm-1 at room temperature wich increase to 2.94 x10-3 S.cm-1 at 80&deg;C, and activation energy around 35 kJmol-1, and a transmittance of 75% in the visible range. All the obtained results show pectin-based polymer electrolytes over promising materials to be used in opto-electrochemical devices.
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Camilo, Katyana França Bonini. "Complexo pectina/caseína: aspectos básicos e aplicados." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/60/60137/tde-21052009-155617/.

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Os sistemas de liberação de fármacos são parte integrante da investigação farmacêutica. Grande ênfase tem sido dada à utilização de polímeros hidrofílicos naturais como carreadores devido às vantagens inerentes a seu baixo custo, biocompatibilidade e segurança de uso. Os objetivos principais deste trabalho foram a preparação e avaliação de sistemas microparticulados a base de pectina e caseína e o estudo da liberação in vitro do aciclovir contido nas micropartículas. Esses sistemas visam uma liberação prolongada do fármaco aumentando sua biodisponibilidade oral. O efeito de parâmetros como pH, força iônica, viscosidade, proporção e concentração total de polímeros foi avaliado. A melhor condição para ocorrência da coacervação foi determinada por mobilidade eletroforética, rendimento do coacervado e microscopia ótica. A pectina e a caseína podem interagir formando complexos insolúveis. A formação do complexo coacervado foi espontânea e ocorreu em condições brandas no intervalo de pH em que os polímeros encontram-se carregados com cargas opostas. As dispersões foram secas em Spray dryer, resultando em partículas bastante pequenas (6µm) e homogêneas. Através da microscopia ótica foi possível observar que o fármaco se encontrava no interior das micropartículas. O pH (4,0-5,0) do meio influenciou decididamente a formação dos complexos coacervados, e a melhor relação mássica para o par pectina/caseína foi 1:1. Proporções superiores ou inferiores reduziram significativamente a extensão da coacervação. O aumento no teor de sólidos totais (4-8% p/v) bem como a adição de sal (0-120 mMol) não suprimiu a formação ou a estabilidade do sistema. Foram preparadas matrizes hidrofílicas contendo as micropartículas encapsuladas com aciclovir. O estudo de dissolução in vitro demonstrou que a liberação do aciclovir foi mais lenta nos sistemas matriciais e microparticulados do que a do fármaco livre. Entretanto, as matrizes apresentaram perfis de liberação sustentada mais adequados do que os sistemas microparticulados.<br>Drug delivery systems became an integral part of pharmaceutical research. The use of natural hydrophilic polymers as drug carriers has received considerable attention in the last few years, especially from the viewpoint of cost, environmental concerns and safety. The main purpose of this study was to report and discuss the preparation of a microparticulate system by mixing the negatively charged pectin and the amphoteric casein and also the in vitro evaluation of polymeric microparticulate systems loaded with acyclovir. Such drug delivery system was conceived to prolong the therapeutic activity of acyclovir and increase its oral biovailability.The influence of pH, total biopolymers concentration, viscosity of dispersions, pectin/casein ratio and ionic strength were reported. Zeta potential measurements and dry coacervate yield were used to determine the optimal conditions for complex coacervation and were supplemented by optical microscopy. Pectin/casein in aqueous mixture may interact and form insoluble complexes. The complex formation was spontaneous and occurs under mild conditions. The phenomenon of complex coacervation mainly occurs at a pH range when both polyelectrolytes carry opposite charges. Microparticulate preparations were spray dried and results showed that the microparticles obtained were always quite small, the diameters of 80% of the particles did not exceed 6m, and physicochemical characterization showed that the drug was homogeneously dispersed inside the microparticles. Pectin/casein ratio and pH range were found to mainly affect the microparticles formation and encapsulation efficiency. The complex coacervation was dependent on pH (4,0-5,0) and the optimum pectin/casein ratio was 1:1. Superior or inferior proportion significantly decreased the coacervate yield. Increasing in total biopolymer concentration (4-8% w/v) and salt addition (0-120 mMol) did not inhibit the formation and stability of pectin/casein systems. Hydrophilic matrices containing acyclovir loaded microparticles were also prepared. The in vitro dissolution profile of acyclovir from the microparticulate systems and matrices were slower than that for the free drug. However, the sustained release characteristic was more prominent in matrices than in microparticles formulations
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Books on the topic "Pectinida"

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International, Pectinid Workshop (8th 1991 Cherbourg France). Fisheries, biology, and aquaculture of pectinids: 8th International Pectinid Workshop = Pêches, biologie et aquaculture des pectinidés : 8e Atelier international sur les pectinidés : Cherbourg, France, 22-29 mai 1991. Editions IFREMER, 1995.

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Newell, Norman Dennis. Pectinoid bivalves of the Permian-Triassic crisis. American Museum of Natural History, 1995.

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Jensen, Nancy K. Prairie cordgrass: Spartina pectinata Link, plant symbol=SPPE. USDA Natural Resources Conservation Service, Plant Materials Program, 2004.

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I͡Akushin, L. N. Kratkiĭ atlas pozdnemelovykh dvustvorchatykh molli͡uskov (Ostreoida, Pectinoida) i͡ugo-vostoka Vostochno-Evropeĭskoĭ platformy. Izd-vo "Nauchnai͡a kniga", 2001.

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Yoshio, Satō. Paleontological study of molluscan assemblages of the Miocene Moniwa Formation, northeast Japan and description of their Pectinidae. Geological Survey of Japan, 1991.

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Beu, A. G. Pliocene limestones and their scallops: Lithostratigraphy, pectinid biostratigraphy, and paleogeography of eastern North Island late Neogene limestone. Institute of Geological & Nuclear Sciences Limited, 1995.

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International Pectinid Workshop (11th 1997 La Paz, México). Book of abstracts of the 11th International Pectinid Workshop, La Paz, Baja California Sur, México, April 10-15, 1997. Centro Interdisciplinario de Ciencias Marinas, 1997.

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1929-, Mason James, Shumway Sandra E, Sandifer Paul A, and National Shellfisheries Association, eds. An international compendium of scallop biology and culture: A tribute to James Mason : selected papers from the 7th International Pectinid Workshop. World Aquaculture Society, 1991.

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Bower, Susan M. Atlas of anatomy and histology of larvae and early juvenile stages of the Japanese scallop (Patinopecten yessoensis) =: Atlas d'anatomie et d'histologie des larves et des premiers stades juvéniles du pétoncle japonais (Patinopecten yessoensis). Dept. of Fisheries and Oceans, 1990.

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Bower, Susan M. Atlas of anatomy and histology of larvae and early juvenile stages of the Japanese scallop (Patinopecten yessoensis). Department of Fisheries and Oceans, 1990.

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Book chapters on the topic "Pectinida"

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Bährle-Rapp, Marina. "Abies pectinata." In Springer Lexikon Kosmetik und Körperpflege. Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_15.

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Khare, C. P. "Pedicularis pectinata Wall." In Indian Medicinal Plants. Springer New York, 2007. http://dx.doi.org/10.1007/978-0-387-70638-2_1141.

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Azimova, Shakhnoza S., and Anna I. Glushenkova. "Neopallasia pectinata (Pall.) Poljak." In Lipids, Lipophilic Components and Essential Oils from Plant Sources. Springer London, 2012. http://dx.doi.org/10.1007/978-0-85729-323-7_409.

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Khare, C. P. "Rungia pectinata (L.) Nees." In Indian Medicinal Plants. Springer New York, 2007. http://dx.doi.org/10.1007/978-0-387-70638-2_1389.

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Gibson, Thomas G. "Miocene and Pliocene Pectinidae (Bivalvia) from the Lee Creek Mine and Adjacent Areas." In Smithsonian Contributions to Paleobiology. Smithsonian Institution Press, 1987. http://dx.doi.org/10.5479/si.00810266.61.31.

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Seventeen taxa of Pectinidae (Bivalvia) from lower Miocene to lower Pleistocene strata in the Lee Creek Mine, North Carolina, and surrounding region were studied biometrically. The study of large population samples clarifies the relationships of the taxa and their biostratigraphic utility. Because of widespread geographic distribution of the species into various environmental conditions and relatively short time ranges, the pectens make ideal index species for the outcropping strata. The co-existence of planktonic Foraminifera with the pectinids in some of the strata allows correlation with European stages. Characters found to be most important for discrimination at the subspecific and specific levels include the byssai notch, shape of the resilial insertion, size and shape of the auricles, number and shape of the plicae, and convexity of the valves. One new species, &lt;i&gt;Pecten mclellani&lt;/i&gt;, is described from the upper lower Miocene part of the Pungo River Formation exposed at the Lee Creek Mine. It is demonstrated that &lt;i&gt;Chlamys decemnaria&lt;/i&gt; (Conrad) from the Pliocene should include &lt;i&gt;C. virginianus&lt;/i&gt; (Conrad). A probable intermediate form between &lt;i&gt;Placopecten clintonius&lt;/i&gt; of early Pliocene age and the living &lt;i&gt;P. magellanicus&lt;/i&gt; is illustrated and described. Other rearrangements at the subspecific level are made. Lectotypes are selected for &lt;i&gt;Pecten yorkensis&lt;/i&gt; Conrad, 1867, &lt;i&gt;Pecten eboreus darlingtonensis&lt;/i&gt; Dali, 1898, &lt;i&gt;Pecten eboreus urbannaensis&lt;/i&gt; Mansfield, 1929, &lt;i&gt;Pecten ( Chlamys) eboreus bertiensis &lt;/i&gt;Mansfield, 1937, and &lt;i&gt;Amusium precursor &lt;/i&gt;Dali, 1898.
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Liu, Bo, and Rainer W. Bussmann. "Neopallasia pectinata (Pall.) Poljakov Asteraceae." In Ethnobotany of the Mountain Regions of Central Asia and Altai. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-319-77087-1_91-1.

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Liu, Bo, and Rainer W. Bussmann. "Neopallasia pectinata (Pall.) Poljakov Asteraceae." In Ethnobotany of the Mountain Regions of Central Asia and Altai. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-28947-8_91.

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Pauls, E., and P. R. A. M. Affonso. "The karyotype of Nodipecten nodosus (Bivalvia: Pectinidae)." In Marine Genetics. Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-017-2184-4_11.

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Carter, Joseph G. "Shell Microstructural Data for the Bivalvia. Part V. Order Pectinoida." In Skeletal Biomineralization: Patterns, Processes and Evolutionary Trends. Springer US, 1991. http://dx.doi.org/10.1007/978-1-4899-5740-5_15.

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Gilbert, John J., and Dorothee K. Schreiber. "Induction of diapausing amictic eggs in Synchaeta pectinata." In Rotifera VII. Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-009-1583-1_44.

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Conference papers on the topic "Pectinida"

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MAGALHÃES, FLÁVIA DE SANTANA, VICELMA LUIZ CARDOSO, and MIRIA HESPANHOL MIRANDA REIS. "PURIFICAÇÃO DE PECTINA UTILIZANDO MEMBRANA POLIMÉRICA DE ULTRAFILTRAÇÃO." In ANAIS DO XL CONGRESSO BRASILEIRO DE SISTEMAS PARTICULADOS. Galoa, 2022. http://dx.doi.org/10.17648/enemp-2022-159086.

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Tasevska, Orhideja, Goce Kostoski, and Elizabeta Veljanoska Sarafiloska. "ROTIFERA COMMUNITY AS AN INDICATOR OF THE ECOLOGICAL STATUS OF LAKE PRESPA (R.N. MACEDONIA)." In 53rd Annual Conference of the Serbian Water Pollution Control Society. SERBIAN WATER POLLUTION CONTROL SOCIETY, 2024. http://dx.doi.org/10.46793/voda24.175t.

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The ecological status of Prespa Lake was determined on the basis of taxonomic (number of species, diversity, density) and functional properties (feeding strategy) of rotifers. 44 species were found, 35 littoral and 9 pelagic with an average population density of 25 ind. L-1 and a remarkable share (65%) in the zooplankton assemblage. Microphagous Kellicottia longispina and Keratella cochlearis dominate in spring and summer, and raptorial Polyarthra vulgaris and Synchaeta pectinata in autumn. The dominance of microphagous rotifers indicates increased productivity in Lake Prespa. Pearson's correlation shows that the abundance of rotifers is significantly related to TP and TN.Taxonomic and functional characteristics of rotifers can be an useful indicator of ecological processes in freshwater ecosystems.
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Montes-Rodríguez, Ingrid M., Carmen L. Cadilla, Ricardo González-Méndez, Juan Lopéz-Garriga, and Alexander Ropelewski. "De Novo Assembly of Lucina pectinata Genome using Ion Torrent Reads." In PEARC17: Practice and Experience in Advanced Research Computing 2017. ACM, 2017. http://dx.doi.org/10.1145/3093338.3093362.

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BETTANI, S. R., B. C. CERRI, G. O. RAGAZZO, N. L. SANTOS, M. R. SOARES, and M. A. da SILVA. "BIODEGRADAÇÃO DE PARTÍCULAS DE PECTINA E VINHAÇA EM SOLO." In XXII Congresso Brasileiro de Engenharia Química. Editora Blucher, 2018. http://dx.doi.org/10.5151/cobeq2018-pt.0809.

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Srihapsari, Dwita, Meini Suzery, and Bambang Cahyono. "Formulation of Hyptis pectinata extract tablets as antimalarial and acute toxicity test." In THE 3RD INTERNATIONAL CONFERENCE ON NATURAL SCIENCES, MATHEMATICS, APPLICATIONS, RESEARCH, AND TECHNOLOGY (ICON-SMART2022): Mathematical Physics and Biotechnology for Education, Energy Efficiency, and Marine Industries. AIP Publishing, 2024. http://dx.doi.org/10.1063/5.0211288.

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Casagrande, Jéssica, Marcio Silva, and Maria Helene Giovanetti Canteri. "Atividade da pectina liase extraída de resíduos do maracujá-amarelo." In Simpósio de Bioquímica e Biotecnologia. Galoa, 2017. http://dx.doi.org/10.17648/simbbtec-2017-80827.

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Pursetyo, Kustiawan Tri, Pinta Purbowati, and Laksmi Sulmartiwi. "Degree of deacetylation chitosan from pen shell (Atrina pectinata) with multistage deacetylation process." In THE 1ST INTERNATIONAL CONFERENCE ON MATHEMATICS, SCIENCE, AND COMPUTER SCIENCE (ICMSC) 2016: Sustainability and Eco Green Innovation in Tropical Studies for Global Future. Author(s), 2017. http://dx.doi.org/10.1063/1.4975957.

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ALMEIDA, F. S., A. M. N. TOLEDO, K. C. G. SILVA, and A. C. K. SATO. "HIDROGÉIS DE AMIDO E PECTINA: CARACTERIZAÇÃO DAS PROPRIEDADES MECÂNICAS E MICROESTRUTURA." In XXII Congresso Brasileiro de Engenharia Química. Editora Blucher, 2018. http://dx.doi.org/10.5151/cobeq2018-pt.0181.

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STHEL, M. S., E. P. MUNIZ, J. R. C. PROVETI, and P. S. S. PORTO. "SECAGEM E EXTRAÇÃO DE PECTINA DO ALBEDO DA CASCA DE LARANJA." In X Congresso Brasileiro de Engenharia Química. Editora Edgard Blücher, 2014. http://dx.doi.org/10.5151/chemeng-cobec-ic-02-ft-026.

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Santos, Mayara Kobayashi, Larissa Shinju Hiratsuka, Hans Christian Silva Birene, Dayane Batista Tada, and Andrey DOs SAntos. "SÍNTESE DE NANOPARTÍCULA DE PECTINA PARA ENCAPSULAMENTO DE FÁRMACO ANTI-DIABÉTICO." In 2° Science & Business Connection. Even3, 2024. http://dx.doi.org/10.29327/2-science-business-connection-407088.819273.

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