Forage Quality, Yield and Palatability of Quackgrass (\u3ci\u3eElytrigia repens\u3c/i\u3e (L.) Nevski)

Quackgrass (Elytrigia repens (L.) Nevski) is a competitive perennial invader of pastures and hay meadows which is frequently harvested as forage in mixtures with desired forage species. Field experiments were conducted to compare quackgrass with cool-season perennial grasses grown under the same soil and climatic conditions, in terms of forage quality, productivity, and palatability. The forage quality of the hays was influenced by the grass species. Quackgrass showed forage crude protein (CP) concentration that was equal to those of perennial ryegrass (Lolium perenne), reed canarygrass (Phalaris arundinacea) and Kentucky bluegrass (Poa pratensis), and greater than orchardgrass (Dactylis glomerata). The neutral detergent fiber (NDF) acid detergent fiber (ADF) concentration of the quackgrass was intermediate between those of perennial ryegrass and Kentucky bluegrass. Yields of quackgrass was equal to reed canarygrass, and greater than those of Kentucky bluegrass, orchardgrass and perennial ryegrass. The different hays did not affect the response of animals by feed intake. Quackgrass hay had higher phosphorus (P) and potassium (K) concentration, and lower calcium (Ca), magnesium (Mg) concentrations. Quackgrass was not to be inferior to other cool-season perennial grasses under frequent utilization

Decreased Striatal Dopa Uptake Correlated with Fronto-Temporal Glucose Utilization in Alzheimer\u27s Disease

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Assessment of Dopamine Neurotransmission in Dementia Using Positron Emission Tomography

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ANALYTICAL STUDY ON TPD MEASUREMENTS DURING NEA ACTIVATION PROCESS

We have investigated the desorption of absorbed Cs-related species on the sample surface by temperature programed desorption (TPD). After forming the negative electron affinity (NEA) surface by alternating supply of Cs and O_2 onto the clean p-GaAs (100) surface in an ultra-high vacuum condition. It was found that Cs had several forms of adsorption states on the NEA surface from TPD measurements. The quantum efficiency under 826 nm illumination drops to zero over 300°C, while that with 367 nm drops to zero at about 500°C. It is considered that Cs desorbed about 100 to 300°C was deeply involved in the formation of the NEA surface

A Comparative Study between Brain Atrophy and Cerebral Blood Flow in Aged Normals and Patients with Reversible Ischemic Attacks

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Hippocampal Atrophy Correlated with Decreased Cortical Glucose Metabolism in Dementia: MRI and PET Study

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Cerebral Glucose Metabolic Rate in Visual Cortices Associated with Visual Dysfunction in Multi-Infarct Dementia

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Influence of residual Ga_2O_3 and Cs on the increase in the maximum quantum efficiency of NEA-GaAs by a two-step thermal cleaning process

We investigated the relationship between the increase in the maximum quantum efficiency of negative electron affinity (NEA)-GaAs depending on the thermal cleaning conditions and residual species, e.g., Ga_2O_3 and Cs atoms, on the GaAs surface using temperature-programmed desorption. We found that the increase in the maximum quantum efficiency occurs during thermal cleaning at 500–600℃ for ～8.5 min. The increase in ratio was maximum when the amount of Ga_2O_3 on the GaAs surface was maximum. In the case that Cs atoms remained, when the thermal cleaning was performed in a temperature range where Ga_2O_3 was not formed, the effect facilitating an NEA surface formation was observed. However, the residual Cs atoms might not be affected at an increased maximum quantum efficiency. From the above results, we considered that the double-dipole structures of Cs-Ga_2O_3 and Cs-O are significant to the high quantum efficiency. The Cs-O dipoles are considered to form easily when Ga_2O_3 is on the GaAs surface before the NEA activation, and the amount of Cs-O dipoles required to reduce the vacuum level below the conduction band minimum increase more than usually NEA surface. As a result, the maximum quantum efficiency increases