Results 41 to 50 of about 6,251 (214)

EFFECT OF NATURAL ACTIVATOR (BIOHORM) AND HUMIC ACID ON GROWTH AND QUALITY OF CYCAS PLANT [PDF]

Scientific Journal of Flowers and Ornamental Plants, 2016
This investigation was conducted under open field conditions at the Experimental Farm of Hort. Res. Inst., ARC, Giza, Egypt during 2014 and 2015 seasons to find out the response of two-years-old cycas plant (Cycas revoluta, Thunb.) grown in 20-cm ...
Boshra El-Sayed, Tarek Noor El-Deen, Lobna Abdel-Galeil, Warda Aly   +3 more
doaj   +1 more source

Indexing nature: Carl Linnaeus (1707-1778) and his fact-gathering strategies [PDF]

, 2009
Early modern naturalists were faced with what has been termed the ‘first bio-information crisis’. A key figure in resolving this crisis was the Swedish naturalist Carl Linnaeus (1707-1788).
Müller-Wille, Staffan, Scharf, Sara
core  

Error, bias, and long-branch attraction in data for two chloroplast photosystem genes in seed plants [PDF]

, 2000
Sequences of two chloroplast photosystem genes, psaA and psbB, together comprising about 3,500 bp, were obtained for all five major groups of extant seed plants and several outgroups among other vascular plants.
Brady, Siobhan, Hu, J.M., Sanderson, Michael, Scharaschkin, Tanya, Wojciechowski, Martin   +4 more
core   +2 more sources

Looking backward to move forward: Enhancing metadata in scientific collections through interdisciplinary collaboration

PLANTS, PEOPLE, PLANET, EarlyView.
Early modern herbaria house important and useful data on historic environments. However, their contents are often inhospitable to scientific use. Despite this challenge, once their contents have been deciphered, such specimens present novel research opportunities.
Madeline E. White, Stephen A. Harris
wiley   +1 more source

Early evolutionary history of the seed

Biological Reviews, Volume 101, Issue 3, Page 1511-1553, June 2026.
ABSTRACT The seed is an essential stage in the life history of gymnospermous and angiospermous plants, facilitating both their survival and dispersal. We reappraise knowledge of the evolutionary history of the gymnospermous seed, from its origin in the late Devonian through to the well‐known end‐Permian extinctions – an interval encompassing the ...
Richard M. Bateman, Alan R. T. Spencer, Jason Hilton   +2 more
wiley   +1 more source

Genetic Structure and Differentiation of Endangered Cycas Species Indicate a Southward Migration Associated with Historical Cooling Events

Diversity, 2023
Understanding the genetic structure and differentiation in endangered species is of significance in detecting their phylogenetic relationships and prioritizing conservation.
Zhi He, Zhi Yao, Kailai Wang, Youzhi Li, Yongbo Liu   +4 more
doaj   +1 more source

Evaluación de alternativas para el combate de la escama de las cicas (Aulacaspis yasumatsui) (Hemiptera: Diaspididae) en un cultivo de Cycas revoluta, Santa Clara, San Carlos [PDF]

, 2011
Proyecto de graduación (Licenciatura en Ingeniería de Agronomía) Instituto Tecnológico de CostaRica, Escuela de Agronomía, 2011La escama de las cicas (Aulacaspis yasumatsui) es un hemíptero de la familia Diaspidae.
Naranjo-Díaz, César
core  

Fighting their last stand? A global analysis of the distribution and conservation status of gymnosperms [PDF]

, 2015
Aim: Gymnosperms are often described as a marginal and threatened group, members of which tend to be out-competed by angiosperms and which therefore preferentially persist at higher latitudes and elevations.
Bigras, Bond, Bowe, Brodribb, Carlquist, Cernusak, Chaw, Coiffard, Collen, Connor, Coomes, Coomes, Davies, Debreczy, Eckenwalder, eFloras, Enright, Ewers, Farjon, Farjon, Farjon, Feuerer, Fridley, Friedman, Gerstner, Gibson, Hastie, Henschel, Hill, Hillebrand, IUCN, Jablonski, Jenkins, Jones, Kozlowski, Kramer, Kreft, Leslie, Lomolino, Lusk, McCain, McCoy, Meyer, Mittelbach, Motomura, Mutke, Pimm, Purvis, Pärtel, R Core Team, Ran, Robinson, Rohde, Roskov, Rumeu, Rybicki, Safi, SAS Institute Inc, Sax, Soltis, Soltis, Sperry, Sperry, Stoffel, Takhtajan, Tang, Tredici, Visser, Wang, Willert, Willert, Williams, Wood, Wood, Wood, Wright, Zhao   +76 more
core   +2 more sources

Phytochemical Investigation ofCycas circinalisandCycas revolutaLeaflets: Moderately Active Antibacterial Biflavonoids [PDF]

Planta Medica, 2010
Chemical examination of the methanolic extract of the leaflets of CYCAS CIRCINALIS L. led to the isolation of one new biflavonoid, (2 S, 2'' S)-2,3,2'',3''-tetrahydro-4',4'''-di- O-methylamentoflavone (tetrahydroisoginkgetin; 2), and 15 known compounds, 11 of which are reported for the first time from C. CIRCINALIS.
Abeer, Moawad, Mona, Hetta, Jordan K, Zjawiony, Melissa R, Jacob, Mohamed, Hifnawy, Jannie P J, Marais, Daneel, Ferreira   +6 more
openaire   +2 more sources

Cyclic Peptide Conformational Landscapes Through the Lens of Mass Spectrometry and Orthogonal Spectroscopy

Journal of Mass Spectrometry, Volume 61, Issue 5, May 2026.
ABSTRACT Cyclic peptides occupy a structurally dynamic region of chemical space, where function often arises from ensembles rather than a single dominant fold. Closed backbones, frequent N‐methylation, heteroatoms, unnatural amino acids, and a strong propensity for metal coordination create dense conformational and coordination landscapes that ...
Emmanuel Nkyaagye, Happy Abena Safoah, Thanh D. Do   +2 more
wiley   +1 more source