Results 51 to 60 of about 23,660 (197)

INDEPENDENT ORIGINATION OF FLORAL ZYGOMORPHY, A PREDICTED ADAPTIVE RESPONSE TO POLLINATORS: DEVELOPMENTAL AND GENETIC MECHANISMS [PDF]

open access: yes, 2016
Observations of floral development indicate that floral organ initiation in pentapetalous flowers more commonly results in a medially positioned abaxial petal (MAB) than in a medially positioned adaxial petal (MAD), where the medial plane is defined by ...
Bukhari, Ghadeer, Zhang, Wenheng
core   +1 more source

New high-performance liquid chromatography-dad method for analytical determination of arbutin and hydroquinone in rat plasma [PDF]

open access: yes, 2015
Natural substances present in herbal preparations should be carefully used because they can give toxic or therapeutic effects despite of their amount or the way of administration.
Altieri, I.   +5 more
core   +2 more sources

CONTRIBUCIÓN AL CONOCIMIENTO DE LOS ESTRATOS DE LA VEGETACIÓN DE LAS QUEBRADAS QUE FLUYEN HACIA EL RÍO CHIRIQUÍ (ÁREA DE TRANSVASE), PROVINCIA DE CHIRIQUÍ, REPÚBLICA DE PANAMÁ

open access: yesTecnociencia, 2004
  El área correspondiente a las quebradas Zarciadero, Las Huacas, Zumbona, Pinola y La Tigra tienen un gran valor como superficie protectora de gran cantidad de agua, por consiguiente el trasvase de estas ayuda a garantizar un nivel óptimo de agua a el ...
Vielka Murillo G.
doaj  

ERICACEAE

open access: yesBothalia: African Biodiversity & Conservation, 1995
A NEW SPECIES OF ERICA PROM THE WESTERN ...
E. G. H. Oliver
doaj   +1 more source

Revealing the last 13,500 years of environmental history from the multiproxy record of a mountain lake (Lago Enol, northern Iberian Peninsula) [PDF]

open access: yes, 2009
This is the author's accepted manuscript. The final publication is available at Springer via http://dx.doi.org/10.1007/s10933-009-9387-7.We present the Holocene sequence from Lago Enol (43°16′N, 4°59′W, 1,070 m a.s.l.), Cantabrian Mountains, northern ...
Ana Moreno   +122 more
core   +1 more source

Diterpenoids with acetylcholinesterase inhibitory activity from Pieris japonica

open access: yesGuangxi Zhiwu
In order to investigate the diterpenoid components from the leaves of Pieris japonica and their acetylcholinesterase (AChE) inhibitory activities, with the aid of thin-layer chromatography color characteristics, silica gel, MCI and semi-preparative high ...
LI Huijuan   +4 more
doaj   +1 more source

ERICACEAE

open access: yesBothalia: African Biodiversity & Conservation, 1984
A NEW SPECIES OF PHILIPPIA, FROM THE ...
E. G. H. Oliver
doaj   +1 more source

Are plants with anti-cancer activity resistant to crown gall? : A test of hypothesis [PDF]

open access: yes, 2007
The Crown gall tumour assay (CGTA) is one of several bench top bioassays recommended for the rapid screening of plants with anti-cancer activity. The rationale for the use of the bioassay is that the tumorogenic mechanism initiated in plant tissues by ...
BT. Ramesha   +4 more
core   +1 more source

The biology of mycorrhiza in the Ericaceae [PDF]

open access: yesNew Phytologist, 1995
summaryIn acid mor‐humus soils of heathland ecosystems fungi are a significant part of the soil biomass. In these organic soils chitin and hyphal wall hexosamines are major potential sources of nitrogen (N). The ability of the ericoid mycorrhizal fungus Hymenoscyphus ericae (Read) Korf & Kernan to degrade purified chitin and the hexosamines, N ...
SIMON J. KERLEY, DAVID J. READ
openaire   +1 more source

Progress in phylogenetics, multi-omics and flower coloration studies in Rhododendron

open access: yesOrnamental Plant Research
The genus Rhododendron exhibits an immense diversity of flower colors and represents one of the largest groups of woody plants, which is of great importance for ornamental plant research.
Shuai Nie   +7 more
doaj   +1 more source

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