نتایج جستجو برای: dbh

تعداد نتایج: 1627  

2005
Robson Fernando Missio Alexandre Marques da Silva Luiz Antônio dos Santos Dias Mário Luiz Teixeira de Moraes Marcos Deon Vilela de Resende

The objective of this study was to select Pinus kesya progenies by the estimation of genetic parameters using the method of restricted maximum likelihood (Reml) and prediction of additive genetic values by the best linear unbiased prediction (Blup). The Pinus kesya progeny test was installed in randomized blocks, which consisted of 30 progenies and three replications. The twenty-year-old trees ...

Journal: :Cell 1997
Steven A. Thomas Richard D. Palmiter

The roles of norepinephrine (NE) and epinephrine in behavior were investigated by targeted disruption of the dopamine beta-hydroxylase (Dbh) gene, thereby eliminating these compounds in vivo. Most heterozygous pups born to Dbh-/- females died within several days of birth and were often found scattered within the bedding. Potential causes including deficits in olfaction and lactation were not ap...

Journal: :Neuropsychologia 2009
Ciara M Greene Mark A Bellgrove Michael Gill Ian H Robertson

Sustained attention is modulated by the neurotransmitter noradrenaline. The balance of dopamine and noradrenaline in the cortex is controlled by the DBH gene. The principal variant in this gene is a C/T change at position -1021, and the T allele at this locus is hypothesised to result in a slower rate of dopamine to noradrenaline conversion than the C allele. Two hundred participants who were g...

2015
Chanpreet Singh Grigorios Oikonomou David A Prober

Pharmacological studies in mammals suggest that norepinephrine (NE) plays an important role in promoting arousal. However, the role of endogenous NE is unclear, with contradicting reports concerning the sleep phenotypes of mice lacking NE due to mutation of dopamine β-hydroxylase (dbh). To investigate NE function in an alternative vertebrate model, we generated dbh mutant zebrafish. In contrast...

Journal: :international journal of environmental research 0

we investigated the relations among infection intensity of european mistletoe (viscum album l.) with host tree features in nour forest park, located in caspian forests in north of iran. the number of 30 circular plots with an area of 0.1 ha were sampled in all places have an aggregation of infested trees. parameters including dbh, height, distance to stand edge, distance to conspecific tree, ba...

Journal: :Journal of applied physiology 2011
Jan T Groothuis Dick H J Thijssen Jacques W M Lenders Jaap Deinum Maria T E Hopman

Maintaining blood pressure during orthostatic challenges is primarily achieved by baroreceptor-mediated activation of the sympathetic nervous system, which can be divided into preganglionic and postganglionic parts. Despite their preganglionic autonomic failure, spinal cord-injured individuals demonstrate a preserved peripheral vasoconstriction during orthostatic challenges. Whether this also a...

2009
Mikko Vastaranta Timo Melkas Markus Holopainen Harri Kaartinen Juha Hyyppä Hannu Hyyppä

Remote-sensing (RS) methods, such as airborne laser scanning (ALS), are capable of acquiring tree-level forest information with high accuracy. However, these methods need more detailed reference data from sample plots than standwise mean characteristics. Field-measured treewise characteristics must be matched with ALS data on the measured position of the tree. In addition to tree position and s...

2009
Andrew O. Finley Sudipto Banerjee

We will use forest inventory data from a long-term ecological research site in western Oregon (WEF). These data consist of a census of all trees in a 10 ha stand. Diameter at breast height (DBH) and tree height (HT) have been measured for all trees in the stand. For a subset of these trees, the distance from the center of the stem to the edge of the crown was measured at each of the cardinal di...

Journal: :Circulation 1999
M C Cho M Rao W J Koch S A Thomas R D Palmiter H A Rockman

BACKGROUND Elevated circulating norepinephrine (NE) has been implicated in causing the profound beta-adrenergic receptor (betaAR) downregulation and receptor uncoupling that are characteristic of end-stage human dilated cardiomyopathy, a process mediated in part by increased levels of beta-adrenergic receptor kinase (betaARK1). To explore whether chronic sustained NE stimulation is a primary st...

2007
ROGER W. PERRY RONALD E. THILL

—We used radiotelemetry to locate 51 diurnal roosts for 17 male Seminole bats (Lasiurus seminolus) during late spring and early summer, 2000–2005. We quantified characteristics of roost trees and sites surrounding roosts and compared those measurements with random trees and random locations. All but two roosts were located in the foliage of large overstory pines (Pinus sp.). All roosts were in ...

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