2,113 research outputs found
Adaptability and Extension Activity of Dwarf Napiergrass in Southern Kyushu and Elsewhere since Its Introduction to Japan 15 Years Ago
Southern Kyushu is well suited to the cultivation of tropical grasses due to its warm climate, history of herbage production, and extensive areas of abandoned arable land. In 1996, a C4-tropical dwarf variety of a late-heading (DL) napiergrass (Pennisetum purpureum Schumach) was introduced from the USA into southern Kyushu via Thailand. Since 2004, DL napiergrass has been evaluated for its production potential, overwintering ability, and suitability for grazing. In Miyazaki, napiergrass exhibits superior sustainability, persisting for more than 5 years without annual renovation. The species shows excellent overwintering ability in coastal areas and is resilient to pathogens and insects. Evaluation at several sites in southern Kyushu revealed that DL napiergrass required minimum winter temperatures to be above â6.2°C to persist over winter. Cultivation of this grass has been successfully extended to more than 10 sites, including isolated islands around Kyushu and at several of these sites livestock farms are now using DL napiergrass. Temperate Italian ryegrass (Lolium multiflorum Lam.) can be successfully established in the inter-row to increase biomass in spring and is well utilized by grazing beef cattle. However, the transplantation of DL napiergrass requires the use of nursery plants for vegetative propagation, and this has been efficiently developed using multi-celled tray beds. DL napiergrass cannot survive the winters of central and northern Japan, however as the species produces 5â18 T DM/ha/yr of highly palatable and good quality herbage, there is potential to increase its use as an annual pasture in these areas
Baryon formation and dissociation in dense hadronic and quark matter
We study the formation of baryons as composed of quarks and diquarks in hot
and dense hadronic matter in a Nambu--Jona-Lasinio (NJL)--type model. We first
solve the Dyson-Schwinger equation for the diquark propagator and then use this
to solve the Dyson-Schwinger equation for the baryon propagator. We find that
stable baryon resonances exist only in the phase of broken chiral symmetry. In
the chirally symmetric phase, we do not find a pole in the baryon propagator.
In the color-superconducting phase, there is a pole, but is has a large decay
width. The diquark does not need to be stable in order to form a stable baryon,
a feature typical for so-called Borromean states. Varying the strength of the
diquark coupling constant, we also find similarities to the properties of an
Efimov states.Comment: ReVTex 4, 8 pages, 7 figures; accepted version in Phys. Lett.
Special Relativistic Magnetohydrodynamic Simulation of Two-Component Outflow Powered by Magnetic Explosion on Compact Stars
The nonlinear dynamics of outflows driven by magnetic explosion on the
surface of a compact star is investigated through special relativistic
magnetohydrodynamic simulations. We adopt, as the initial equilibrium state, a
spherical stellar object embedded in hydrostatic plasma which has a density
and is threaded by a dipole magnetic field. The
injection of magnetic energy at the surface of compact star breaks the
equilibrium and triggers a two-component outflow. At the early evolutionary
stage, the magnetic pressure increases rapidly around the stellar surface,
initiating a magnetically driven outflow. A strong forward shock driven outflow
is then excited. The expansion velocity of the magnetically driven outflow is
characterized by the Alfv\'en velocity on the stellar surface, and follows a
simple scaling relation . When the
initial density profile declines steeply with radius, the strong shock is
accelerated self-similarly to relativistic velocity ahead of the magnetically
driven component. We find that it evolves according to a self-similar relation
, where is the Lorentz
factor of the plasma measured at the shock surface . Purely
hydrodynamic process would be responsible for the acceleration mechanism of the
shock driven outflow. Our two-component outflow model, which is the natural
outcome of the magnetic explosion, can provide a better understanding of the
magnetic active phenomena on various magnetized compact stars.Comment: Accepted for publication in ApJ. 15 pages, 2 tables, 17 figure
Superconductivity in the Correlated Pyrochlore Cd_2Re_2O_7
We report the observation of superconductivity in high-quality
CdReO single crystals with room-temperature pyrochlore structure.
Resistivity and ac susceptibility measurements establish an onset transition
temperature T = 1.47 K with transition width T = 0.25
K. In applied magnetic field, the resistive transition shows a type-II
character, with an approximately linear temperature-dependence of the upper
critical field H. The bulk nature of the superconductivity is confirmed
by the specific heat jump with C = 37.9 mJ/mol-K. Using the
value extracted from normal-state specific heat data, we obtain
C/T = 1.29, close to the weak coupling BCS value. In the
normal state, a negative Hall coefficient below 100 K suggests electron-like
conduction in this material. The resistivity exhibits a quadratic T-dependence
between 2 and 60 K, i.e., +AT, indicative of Fermi-liquid
behavior. The values of the Kadowaki-Woods ratio A/ and the Wilson
ratio are comparable to that for strongly correlated materials.Comment: 4 pages, 5 figure
Inoculation with Arbuscular Mycorrhizal Fungi or Crop Rotation with Mycorrhizal Plants Improves the Growth of Maize in Limed Acid Sulfate Soil
Arbuscular mycorrhizal fungi (AMF) improve the uptake of immobile mineral nutrients such as phosphate, thereby improving plant growth. In acid sulfate soil (ASS), AMF spore density is generally low which impacts root colonization and phosphate uptake. Thus, inoculation may help increase AMF colonization of crops grown in ASS. AMF spore density decreases after cultivation of a non-host crop or bare fallow. In addition, preceding crops affect the growth and yield of subsequent crops. The production of AMF inocula requires AMF-compatible plants. The objective of the present study is to elucidate the effect of preceding crops on the persistence of inoculated AMF and growth of succeeding maize under an ASS condition with lime application. Spore density of AMF after cultivation of preceding crops (soybean or jobâs tears) was maintained in comparison to fallow leading to higher AMF colonization of maize and improved plant growth. Thus, maintenance of AMF spore density, either through selection of preceding crops or application of AMF inoculum, may be a viable strategy to improve maize growth in limed ASS of Thailand
Inoculation with Arbuscular Mycorrhizal Fungi or Crop Rotation with Mycorrhizal Plants Improves the Growth of Maize in Limed Acid Sulfate Soil
Arbuscular mycorrhizal fungi (AMF) improve the uptake of immobile mineral nutrients such as phosphate, thereby improving plant growth. In acid sulfate soil (ASS), AMF spore density is generally low which impacts root colonization and phosphate uptake. Thus, inoculation may help increase AMF colonization of crops grown in ASS. AMF spore density decreases after cultivation of a non-host crop or bare fallow. In addition, preceding crops affect the growth and yield of subsequent crops. The production of AMF inocula requires AMF-compatible plants. The objective of the present study is to elucidate the effect of preceding crops on the persistence of inoculated AMF and growth of succeeding maize under an ASS condition with lime application. Spore density of AMF after cultivation of preceding crops (soybean or jobâs tears) was maintained in comparison to fallow leading to higher AMF colonization of maize and improved plant growth. Thus, maintenance of AMF spore density, either through selection of preceding crops or application of AMF inoculum, may be a viable strategy to improve maize growth in limed ASS of Thailand
Ependymoma associated protein Zfta is expressed in immature ependymal cells but is not essential for ependymal development in mice
The fusion protein of uncharacterised zinc finger translocation associated (ZFTA) and effector transcription factor of tumorigenic NFâÎșB signalling, RELA (ZFTAâRELA), is expressed in more than twoâthirds of supratentorial ependymoma (STâEPNâRELA), but ZFTAÂżs expression profile and functional analysis in multiciliated ependymal (E1) cells have not been examined. Here, we showed the mRNA expression of mouse Zfta peaks on embryonic day (E) 17.5 in the wholemount of the lateral walls of the lateral ventricle. Zfta was expressed in the nuclei of FoxJ1âpositive immature E1 (preâE1) cells in E18.5 mouse embryonic brain. Interestingly, the transcription factors promoting ciliogenesis (ciliary TFs) (e.g., multicilin) and ZFTAâRELA upregulated luciferase activity using a 5âČ upstream sequence of ZFTA in cultured cells. Zftatm1/tm1 knockâin mice did not show developmental defects or abnormal fertility. In the Zftatm1/tm1 E1 cells, morphology, gene expression, ciliary beating frequency and ependymal flow were unaffected. These results suggest that Zfta is expressed in preâE1 cells, possibly under the control of ciliary TFs, but is not essential for ependymal development or flow. This study sheds light on the mechanism of the ZFTAâRELA expression in the pathogenesis of STâEPNRELA: Ciliary TFs initiate ZFTAâRELA expression in preâE1 cells, and ZFTAâRELA enhances its own expression using positive feedback
Tubo-ovarian abscess in a patient with cri du chat syndrome: A case report
A tubo-ovarian abscess is an infection that occurs as a sequela of pelvic inflammatory disease. There is no reported association between a tubo-ovarian abscess and cri du chat syndrome in the medical literature. Herein, we report the case of a 44-year-old woman with cri du chat syndrome who was subsequently diagnosed with a tubo-ovarian abscess. After emergent laparotomy, simple total hysterectomy, and bilateral adnexectomy, the patient was discharged 13 days postoperatively without complications
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