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Start Over Coverage 151-155

2. New gfz effective angular momentum excitation functions and their impact on nutation

Creator:
Vondrak , Jan and Ron , Cyril
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
Rotation of the Earth, geophysical excitations, geomagnetic jerks, celestial pole offsets, and free core nutation
Language:
English
Description:
Recently the Earth System Modelling Group of GeoForschungsZentrum (ESMGFZ) in Potsdam started producing a new series of Effective Angular Momentum Excitation Functions (EAM). As a novelty, the data is given in 3-hour resolution for the influence of the atmosphere and dynamic ocean, and 1-day resolution for terrestrial hydrosphere and barystatic sea-level changes. In addition to this, IERS recently started publishing their new series of C04 solution for Earth Orientation Parameters (EOP), based on new combination of all observations and ITRF2014 terrestrial frame. We use the ESMGFZ data to numerically integrate Brzeziński’s broad-band Liouville equations in celestial frame and compare the results with IERS C04 solution for celestial pole offsets in the interval 1986.0-2018.4. Alternatively, we also add a possible influence of unevenly distributed Geomagnetic jerks (GMJ). In the process of integration we look for the best-fitting parameters (period T, Q-factor) of Free Core Nutation (FCN). It is demonstrated that the fit between integrated and observed values is much better when compared with our previous solutions, based on older models of geophysical excitations. The fit is improved significantly when GMJ quasi-impulse effect is included. The best fit is obtained for atmospheric, oceanic and GMJ excitations, the preferred parameters of FCN being.. . We also estimate new value for empirical prograde MHB Sun-synchronous correction.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

3. Photosynthetic variation in mesophyll protoplasts and seedling leaves in Lolium species

Creator:
Watanabe, N.
Format:
print
Type:
model:internalpart and TEXT
Language:
Multiple languages
Description:
Photosynthetic characteristics of seedling leaves and mesophyll protoplasts in Lolium species were assessed to search possibility for improvement of two cultivated species, L. pereme and L. mulíiflorum. Smáli size of mesophyll protoplasts was a suitable trait for estimating photosynthetic characteristics, when combined with high photosynthetic rate (Fn) P^r protoplast. L. rigidum and L. suhlatum háve more potential for improvement of because of higher per unit leaf aiea and per chlorophyll (Chl) and higher rate of Chl content: surface area of protoplast, than L. pereme and L. multiflorum.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

4. Photosynthetic water use efficiency in tree crowns of Shorea beccariana and Dryobalanops aromatica in a tropical rain forest in Sarawak, East Malaysia

Creator:
Kitahashi, Y., Ichie, T., Maruyama, Y., Kenzo, T., Kitaoka, S., Matsuki, S., Chong, L., Nakashizuka, T., and Koike, T.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
Dipterocarpaceae species, hydraulic limitation, leaf area and thickness, nitrogen, saturation irradiance, specific leaf area, stomatal conductance, and water potential
Language:
Multiple languages
Description:
Photosynthetic water use efficiency (PWUE), stomatal conductance (gs), and water potential were measured at two different positions in the tree crown of two emergent tropical tree species (Shorea beccariana Burck, Dryobalanops aromatica Gaertn. f.). The trees were about 50 m high, in a tropical rain forest in Sarawak, East Malaysia. In both species, gs at the upper crown position at midday was lower than at the lower crown position, even though both positions were exposed to full sunlight; the difference was greater in S. beccariana. Hydraulic limitation occurs in the upper crown position in both species. A midday depression was observed in the photon saturated photosynthetic rate in both species, especially at the upper crown. However, PWUE was markedly higher in the upper crown than the lower crown at midday, even though no morphological adjustment was observed in the leaves; this difference was greater in S. beccariana. and Y. Kitahashi ... [et al.].
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

5. Resonance intermittance causes the gravitational splitting of meteor streams

Creator:
Froeschle, C. and Scholl, H.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
astronomy, meteor streams, and gravitational splitting
Language:
Czech
Description:
The dynamical evolution of meteor stream particles in resonance appear to be affected by the same resonance mechanisms as rcsonant asteroids. Crossing of separatrix.like zones appears to be crucial for the formation of arcs and for the dissolution of streams. Investigating the orbital evolution of known resonant meteor streams and of model streams, we have found examples for such a transitory are formation. The orbital inclination of a meteor stream appears to be a critical parameter for arc formation.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

6. Toxoplasma gondii strain-dependent effects on mouse behaviour

Creator:
Kannan, Geetha, Moldovan, Krisztina, Xiao, Jian-Chun, Yolken, Robert H., Jones-Brando, Lorraine, and Pletnikov, Mikhail V.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
Toxoplasma, behaviour, and strain dependency
Language:
English
Description:
Toxoplasma gondii reportedly manipulates rodent behaviour to increase transmission to its definitive feline host. We compared the effects of mouse infection by two Type II strains of T. gondii, Prugniaud (PRU) and ME49, on attraction to cat odour, locomotor activity, anxiety, sensorimotor gating, and spatial working and recognition memory 2 months post-infection (mpi). Attraction to cat odour was reassessed 7 mpi. At 2 mpi, mice infected with either strain exhibited significantly more attraction to cat odour than uninfected animals did, but only PRU-infected mice exhibited this behaviour 7 mpi. PRU-infected mice had significantly greater body weights and hyperactivity, while ME49-infected mice exhibited impaired spatial working memory. No differences in parasite antibody titres were seen between PRU- and ME49-infected mice. The present data suggest the effect of T. gondii infection on mouse behaviour is parasite strain-dependent.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public