Results 111 to 120 of about 14,758 (206)

Chemotaxis of Bracken Spermatozoids : The Role of Bimalate Ions [PDF]

open access: yes, 1958
1. Bracken spermatozoids are chemotactically attracted by malic acid salts and in a pH gradient aggregate between pH 3.5 and 5.6. 2. This response to pH occurs only when the sperm suspension contains malate. 3. At higher pH's, the response to an H+
Brokaw, C. J.
core   +1 more source

New Proposals on Portuguese Vegetation (II) [PDF]

open access: yes, 2010
As a consequence of the geobotanical studies that have been developed in west and southern areas of the Iberian Peninsula, four new phytosociological associations are proposed, integrated in the perennial mesophytic grasslands of Stipo giganteae ...
Meireles, Catarina   +2 more
core  

Patterns of understory invasion in invasive timber stands of a tropical sky island. [PDF]

open access: yesEcol Evol, 2023
Jobin V   +5 more
europepmc   +1 more source

The middle Waikato Basin and hills [PDF]

open access: yes, 1992
The middle Waikato (or Hamilton) Basin is a roughly oval-shaped depression more than 80 km north to south and more than 40 km wide. The basin, except in the south, is almost completely surrounded by ranges up to 300 m high, broken by only a few gaps.
Lowe, David J., Selby, Michael J.
core   +1 more source

Plastome phylogenomic analysis reveals evolutionary divergences of Polypodiales suborder Dennstaedtiineae. [PDF]

open access: yesBMC Plant Biol, 2022
Lu JM   +8 more
europepmc   +1 more source

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