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12 rezultatus
Environmental factors affect the distribution of two Epichloë fungal endophyte species inhabiting a common host grove bluegrass (Poa alsodes).
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Aim
The endophyte Epichloë alsodes, with known insecticidal properties, is found in a majority of Poa alsodes populations across a latitudinal gradient from North Carolina to New York. A second endophyte, E. schardlii var. pennsylvanica, with knownOvarian steroids stimulate adenosine triphosphate-sensitive potassium (KATP) channel subunit gene expression and confer responsiveness of the gonadotropin-releasing hormone pulse generator to KATP channel modulation.
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The ATP-sensitive potassium (K(ATP)) channels couple intracellular metabolism to membrane potential. They are composed of Kir6.x and sulfonylurea receptor (SUR) subunits and are expressed in hypothalamic neurons that project to GnRH neurons. However, their roles in regulating GnRH secretion have not
A role for ATP-sensitive potassium channels in male sexual behavior.
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ATP-sensitive potassium (K(+)(ATP)) channels regulate cell excitability and are expressed in steroid-responsive brain regions involved in sexual behavior, such as the preoptic area (POA) and medial basal hypothalamus (MBH). We hypothesized that K(+)(ATP) channels serve as a mechanism by which
Comparing the simultaneous determination of cis- and trans-palmitoleic acid in fish oil using HPLC and GC.
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Noradrenaline stimulates somatostatin release from incubated slices of the amygdala and the hypothalamic preoptic area.
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Neurotransmitter effects were studied on in vitro release of immunoreactive somatostatin (SRIF) from slices prepared from several regions of the rat brain: mediobasal hypothalamus (MBH), preoptic anterior hypothalamic area (POA) and amygdaloid complex (AMY). Potassium (K+, 56 mM) stimulated SRIF
Regional distribution and in vitro secretion of salmon and chicken-II gonadotropin-releasing hormones from the brain and pituitary of juvenile and adult goldfish, Carassius auratus.
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The content of salmon (sGnRH) and chicken-II (cGnRH-II) gonadotropin-releasing hormones was measured in discrete brain regions and pituitaries of juvenile and postspawning adult goldfish, using specific radioimmunoassays. In juveniles, the content of both peptides was low. sGnRH was the predominant
Relationships among concentrations of four opioid neuropeptides and luteinizing hormone-releasing hormone in neural tissues of beef cows following early weaning.
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Acute changes associated with removal of the inhibition of estrus caused by suckling were examined in beef cows. Calves were weaned during the fifth week after parturition and cows were slaughtered at 0 (n = 8), 36 (n = 8) or 72 h (n = 8) after calf removal. Tissues of preoptic area (POA),
Dietary prevention of stroke and its mechanisms in stroke-prone spontaneously hypertensive rats--preventive effect of dietary fibre and palmitoleic acid.
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Previously it was reported that dietary protein, some amino acids and potassium are effective in preventing stroke in stroke-prone spontaneously hypertensive rats (SHRSP). The present study revealed that other dietary factors could also prevent cerebral lesions, and the mechanism of this effect was
Phosphorus runoff from turfgrass as affected by phosphorus fertilization and clipping management.
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Phosphorus enrichment of surface water is a concern in many urban watersheds. A 3-yr study on a silt loam soil with 5% slope and high soil test P (27 mg kg(-1) Bray P1) was conducted to evaluate P fertilization and clipping management effects on P runoff from turfgrass (Poa pratensis L.) under
Assessment of silt from sand and gravel processing as a suitable sub-soil material in land restoration: A glasshouse study.
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Annually, sand and gravel processing generates approximately 20 million tonnes of non-commercial by-product as fine silt particles (<63 μm) which constitutes approximately 20% of quarry production in the UK. This study is significant as it investigated the use of quarry silt as a sub-soil medium
Mineral concentration in selected native temperate grasses with potential use as biofuel feedstock.
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Stands of native grasses along roadways, in buffer strips, riparian zones and grass prairies have potential utility as feedstock for bioenergy production. The sustainability of harvesting these stands is reliant, in part, on knowledge of the mineral concentration of the harvested grasses because
Differential Responses of Arctic Vegetation to Nutrient Enrichment by Plankton- and Fish-Eating Colonial Seabirds in Spitsbergen.
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The role of seabirds as sea-land biovectors of nutrients is well documented. However, no studies have examined whether and how colonial seabirds that differ in diet may influence terrestrial vegetation. Therefore, the purpose of the study was to describe and compare plant communities located in the
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