Увійти

Готові списки джерел за темами / Tacamahac

Добірка наукової літератури з теми "Tacamahac"

Автор: Grafiati

Опубліковано: 2 червня 2022

Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями

Оберіть тип джерела:

Зміст

Статті в журналах
Дисертації
Книги
Частини книг
Тези доповідей конференцій

Ознайомтеся зі списками актуальних статей, книг, дисертацій, тез та інших наукових джерел на тему "Tacamahac".

Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.

Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.

Статті в журналах з теми "Tacamahac"

1

Greenaway, W., S. English, J. May, and F. R. Whatley. "Analysis of Phenolics of Bud Exudates of Populus cathayana and Populus szechuanica by GC-MS." Zeitschrift für Naturforschung C 47, no. 3-4 (April 1, 1992): 308–12. http://dx.doi.org/10.1515/znc-1992-3-423.

Повний текст джерела

Анотація:

Abstract Analysis of GC-MS data revealed 58 com ponents of bud exudate from P. cathayana (Section Tacamahaca) and 40 components of bud exudate from P. szechuanica (Section Tacamahaca) of which 47 and 35 respectively were phenolics. The bud exudates were very similar in composition, containing flavanones and chalcones (61% and 51% respectively), flavones (15% and 12%) and pentenyl caffeates (11% and 6%). The major single component of the exudate of both poplars was pinobanksin- 3-acetate (26% and 33%). The bud exudates of P. cathayana and P. szechuanica are similar to those of European and American Section Aigeiros poplars and unlike those of North American Section Tacamahaca poplars.

Стилі APA, Harvard, Vancouver, ISO та ін.

2

Greenaway, W., J. May, and F. R. Whatley. "Notes: Analysis of Phenolics of Bud Exudate of Populus laurifolia by GC-MS." Zeitschrift für Naturforschung C 47, no. 9-10 (October 1, 1992): 776–78. http://dx.doi.org/10.1515/znc-1992-9-1023.

Повний текст джерела

Анотація:

Analysis by GC-MS identified 30 phenolic components of the bud exudate of P. laurifolia. The majority of the exudate was composed of flavanones, flavanonols and chalcones, with pinobanksin-3-acetate being the major component. The bud exudate resembled that of the Asian Section Tacamahaca poplars P. cathayana and P. szechuanica but was unlike that of the North American Section Tacamahaca poplars, P. balsamifera and P. trichocarpa.

Стилі APA, Harvard, Vancouver, ISO та ін.

3

Gom, Lori A., and Stewart B. Rood. "Fire induces clonal sprouting of riparian cottonwoods." Canadian Journal of Botany 77, no. 11 (January 30, 2000): 1604–16. http://dx.doi.org/10.1139/b99-135.

Повний текст джерела

Анотація:

The principal native trees in the semiarid regions of southern Alberta are riparian cottonwoods. These include narrowleaf cottonwood, Populus angustifolia James, balsam poplar, Populus balsamifera ssp. balsamifera L., black cottonwood, Populus balsamifera ssp.trichocarpa Torr. & Gray, and prairie cottonwood, Populus deltoides Bartr., and interspecific hybrids. These phreatophytic poplars occur on the moist floodplains along streams and require flood disturbance for seedling recruitment. The present study investigated the responses of cottonwoods to another physical disturbance, fire. Two fires occurred in April 1992, in adjacent groves along the Oldman River at Lethbridge, Alberta. The fires occurred prior to bud flushing and the cottonwoods responded by vigorous sprouting, particularly in the first summer. By September of 1992 about 75% of the burned trees had produced coppice sprouts, new shoots from the remnant stumps. Root suckers, adventitious shoots from the roots of the burned trees, were also common, averaging 1 sucker/3 m2 in the burned zone. Five years after the burns, the number of clonal sprouts was reduced by about half and those had reached an average height of 3 m. Because of the difficulties of species identification for juvenile cottonwoods, sprouts were designated as Populus section Aigeiros (P. deltoides) or section Tacamahaca (the other species). After 5 months, 90% of the sprouting trunks and 80% of the suckers belonged to section Tacamahaca. After 5 years, this ratio had increased to 97% of the sprouting trunks and 98% of the suckers. This indicates that Tacamahaca cottonwoods produced more numerous sprouts with better survival than P. deltoides. This pattern across Populus sections was also observed at seven other cottonwood burn sites in western North America, from northern British Columbia to southern Utah. The Aigeiros cottonwoods, P. deltoides and P. fremontii S. Wats., produced few clonal shoots following fire, whereas Tacamahaca trees sprouted profusely. This study demonstrates that fire disturbance can stimulate clonal regeneration of riparian cottonwoods, particularly of section Tacamahaca.

Стилі APA, Harvard, Vancouver, ISO та ін.

4

Floate, Kevin D. "Extent and patterns of hybridization among the three species of Populus that constitute the riparian forest of southern Alberta, Canada." Canadian Journal of Botany 82, no. 2 (February 1, 2004): 253–64. http://dx.doi.org/10.1139/b03-135.

Повний текст джерела

Анотація:

Three species of Populus (Salicaceae) overlap and hybridize in southern Alberta, Canada. Variation in leaf morphology throughout the region identifies five genetically distinct zones. The drainage of the Oldman River contains a pure zone of balsam poplar (Populus balsamifera L.), a pure zone of plains cottonwood (Populus deltoides Marsh.), plus overlap and hybrid zones of balsam poplar narrowleaf cottonwood (Populus angustifolia James) and balsam poplar narrowleaf cottonwood plains cottonwood. The drainage of the Red Deer River contains a pure zone of balsam poplar, a pure zone of plains cottonwood, plus an overlap and hybrid zone of balsam poplar plains cottonwood. Zones on both drainages coincide with an elevational gradient. Overlap and hybrid zones extend at least 700 river km (the length obtained by measuring distances between sites of hybridization on a river and its tributaries) combined across the two drainages. Principal components analyses on leaf morphology identify a pattern of bidirectional intro gression between sect. Tacamahaca (balsam poplar, narrowleaf cottonwood) species. These analyses also identify a pattern of unidirectional introgression between Tacamahaca and sect. Aigeiros (plains cottonwood) species, with F1 hybrids backcrossing only with the Tacamahaca parent. This pattern of unidirectional introgression subsequently was assessed and supported with data from the drainages of Ashley Creek and the Ogden River, Utah, which contain hybrid and overlap zones between narrowleaf cottonwood (Tacamahaca) and Fremont cottonwood, Populus fremontii S. Watson (Aigeiros). Given its unique nature in terms of extent, health, and composition, and given the effect of plant hybrid zones on the ecology and evolution of their associated organisms, it is hoped that the current study will facilitate future research targeting conservation of this riparian forest in its full genetic complexity.Key words: Populus, hybridization, riparian, cottonwood, introgression.

Стилі APA, Harvard, Vancouver, ISO та ін.

5

Greenaway, W., S. English, J. May, and F. R. Whatley. "Analysis of Phenolics of Bud Exudates of Populus koreana, Populus maximowiczii and Populus suaveolens by GC-MS." Zeitschrift für Naturforschung C 47, no. 3-4 (April 1, 1992): 313–17. http://dx.doi.org/10.1515/znc-1992-3-424.

Повний текст джерела

Анотація:

Abstract Analysis of GC-MS data revealed 76 components of bud exudates from Populus koreana, P. maximowiczii and P. suaveolens (Section Tacamahaca), of which 49 were phenolics. The bulk of the exudates were composed of phenones, pinobanksin-3-acetate and aliphatic esters of caffeic acid. Bud exudates of P. koreana and P. m aximowiczii were virtually identical in composition and closely resembled those of P. suaveolens. The three poplars were alike in having as major com ponents of their bud exudate pentanophenones, which do not occur in the bud exudates of most other poplars. These three Asiatic poplars appear more closely related chemotaxonomically to Section Aigeiros poplars than to those of Section Tacamahaca.

Стилі APA, Harvard, Vancouver, ISO та ін.

6

English, S., W. Greenaway, and F. R. Whatley. "Bud exudate composition of Populus tremuloides." Canadian Journal of Botany 69, no. 10 (October 1, 1991): 2291–95. http://dx.doi.org/10.1139/b91-288.

Повний текст джерела

Анотація:

Gas chromatography – mass spectrometry analysis of the bud exudate of seven specimens of Populus tremuloides (section Leuce) revealed a different chemical composition from that previously observed for poplars of sections Aigeiros and Tacamahaca. The bud exudate consists of three principal groups of compounds; benzoic and phenylpropenoic acids and their esters, the flavanones isosakuranetin and sakuranetin and their corresponding chalcones, and hydrocarbons. The flavonoids characteristic of section Aigeiros and section Tacamahaca poplars were found to be either missing, as in the case of flavanonols and dihydrochalcones, or present in very small amounts. The seven specimens of P. tremuloides analysed were classified into three categories depending on the relative proportions of these three groups of compounds present in their bud exudate, and the exudate composition was compared with that of four specimens of Populus grandidentata analysed. Key words: Populus tremuloides, bud exudate, gas chromatography – mass spectrometry.

Стилі APA, Harvard, Vancouver, ISO та ін.

7

Nasimovich, Yuri, Marina Kostina, and Natalia Vasilieva. "The concept of species in poplars (genus Populus L., Salicaceae) based on the example of the subgenus Tacamahaca (Spach) Penjkovsky representatives growing in Russia and neighbouring countries." SOCIALNO-ECOLOGICHESKIE TECHNOLOGII 9, no. 4 (2019): 426–66. http://dx.doi.org/10.31862/2500-2961-2019-9-4-426-466.

Повний текст джерела

Анотація:

Using the traditional research methods, based on the example of local and cultivated representatives of the Tacamahaca (Spach) Penjkovsky subgenus growing in Russia and neighboring countries, the concept of a species in poplars (genus Populus L., Salicaceae) has been developed. It is suggested that the sections of black poplars (Aigeiros Duby) and balsamic poplars (Tacamahaca Spach) in Eurasia form a single supraspecific system with a common gene pool, which is very similar to syngameon. The taxonomic species that make up such a system are different dynamic states of this system and exist in the equilibrium state between natural selection, which forms and preserves the specifics of each dynamic state, and gene flows from other taxonomic species. Such a system can also be considered as a large Linnaean species represented by many subspecies or even geographical and ecological races. The use of molecular genetic methods for the taxonomic species study in the Populus genus is difficult due to the powerful flow of genes between the species, since the species differ in a small number of genes responsible for adaptive characters. The sections of the subgenus Tacamahaca poplars are ecological. The combination of species in these sections is not so much about the unity of their origin, but about the common growing conditions: black poplars tend to grow in lowlands, while the balsamic poplars tend to grow in the mountains, with which the poplars’ diagnostic characters are associated. In nature, belonging to a certain section is more profitable than the intermediate state, but in cultivation and in the urban environment, the opposite situation is observed.

Стилі APA, Harvard, Vancouver, ISO та ін.

8

Le Coz, Christophe-J. "Allergic contact dermatitis from tamanu oil (Calophyllum inophyllum, Calophyllum tacamahaca)." Contact Dermatitis 51, no. 4 (October 2004): 216–17. http://dx.doi.org/10.1111/j.0105-1873.2004.0424h.x.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

9

Marquina-Chidsey, Germania, Brandfort Monro, Ingrid Velázquez, Daniel Arias, Eliana Pérez, Diego T. Santos, and Maritza Vargas. "Evaluation of supercritical fluid extraction of tacamahaco (Protium heptaphyllum) resin." Journal of Essential Oil Research 29, no. 6 (August 16, 2017): 443–50. http://dx.doi.org/10.1080/10412905.2017.1360217.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

10

Zsuffa, Louis, Dolly Lin, and Peggy Payne. "One-way crossing barriers in some interspecific crosses of Aigeiros and Tacamahaca poplars." Forestry Chronicle 75, no. 5 (October 1, 1999): 833–36. http://dx.doi.org/10.5558/tfc75833-5.

Повний текст джерела

Анотація:

New evidence is described on one way crossing barriers between Aigeiros and Tacamahaca species, gained in experimental full-sib crosses. The technique of crosses and embryo rescue are described. In some crosses of questionable result, the embryo rescue was successful. The possible genetic mechanisms underlying the crossing barriers are discussed. Key words: Populus, hydridization, embryo rescue, crossing barriers

Стилі APA, Harvard, Vancouver, ISO та ін.

Більше джерел

Дисертації з теми "Tacamahac"

1

Talent, Nadia Joan. "Quantitative traits from leaf morphology in some North American species and hybrids of Populus sections Aigeiros and Tacamahaca, Salicaceae." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ34021.pdf.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

2

Beaugendre, Camille. "Caractérisation des résines de Calophyllum inophyllum L. : approches déréplicatives pour la recherche de composés antimicrobiens." Thesis, Université Paris Cité, 2019. http://www.theses.fr/2019UNIP5067.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Книги з теми "Tacamahac"

1

Talent, Nadia. Quantitative traits from leaf morphology in some North American species and hybrids of Populus sections Aigeiros and Tacamahaca (Salicaceae). 1998.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Частини книг з теми "Tacamahac"

1

Bährle-Rapp, Marina. "Calophyllum Tacamahaca Oil." In Springer Lexikon Kosmetik und Körperpflege, 85. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_1570.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Тези доповідей конференцій з теми "Tacamahac"

1

Klimov, A. V., and B. V. Proshkin. "Identification of species and hybrids of Populus L. according to the signs of petiolar anatomy." In Problems of studying the vegetation cover of Siberia. TSU Press, 2020. http://dx.doi.org/10.17223/978-5-94621-927-3-2020-18.

Повний текст джерела

Анотація:

The results of studying the petiolar anatomy of the species of sections Aigeiros and Tacamahaca and their hybrids are presented. It has been established that the anatomical structure of the petioles makes it possible to diagnose the taxon belonging to a section and identify intersection hybrids. Studies of the petiolar anatomy of P. ciliata showed that it does not correspond to the characteristics characteristic of the Tacamahaca section. Analysis of the petiole structure of P. × sibirica confirmed its hybrid origin.

Стилі APA, Harvard, Vancouver, ISO та ін.

2

Lu, Yanyuan, Fang Wang, and Li Pan. "Response of Anatomical Structure to Soil Drought in Old P. kangdingensis Cuttings of Section Tacamahaca Spach." In Proceedings of the 2018 8th International Conference on Management, Education and Information (MEICI 2018). Paris, France: Atlantis Press, 2018. http://dx.doi.org/10.2991/meici-18.2018.112.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

3

Lu, Yanyuan, and Li Pan. "Response of Gas Exchange to Soil Drought in Old P. kangdingensis Cuttings of Section Tacamahaca Spach." In Proceedings of the 2018 8th International Conference on Management, Education and Information (MEICI 2018). Paris, France: Atlantis Press, 2018. http://dx.doi.org/10.2991/meici-18.2018.113.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Ми пропонуємо знижки на всі преміум-плани для авторів, чиї праці увійшли до тематичних добірок літератури. Зв'яжіться з нами, щоб отримати унікальний промокод!