3,738 research outputs found
Antiparticle in Light of Einstein-Podolsky-Rosen Paradox and Klein Paradox
The original version of Einstein-Podolsky-Rosen (EPR) paradox and the Klein
paradox of Klein-Gordon (KG) equation are discussed to show the necessity of
existence of antiparticle with its wavefunction being fixed unambiguously. No
concept of "hole" is needed.Comment: 4 pages, 0 figures. Accepted by Chinese Phys. Let
Supplementation of Moringa (Moringa Oliefera) Powder Into Ration in Increasing the Quality of Broiler's Meat
Guaranteed broiler meat in term of health aspect is necessary currently. Fat and cholesterol contents on broilers are one of quality aspects that should be considered, in which high fat and cholesterol levels would give direct impact on the health of the consumer. Therefore efforts to reduce fat and cholesterol levels of broiler meat are considered to be important. One of the alternatives that could be carried is by supplementing Moringa leaves powder to the chicken ration. Active substances contained by Moringa leaves are expected reduce the fat and cholesterol levels. This research aimed to measure carcass weight, carcass percentage, sub-cutaneous fat and cholesterol contents of the broiler meats, which feed by the supplemented ration. The research used 60 strain CP 707 broiler chickens at an age of 2 weeks, for 5 weeks. The research applied Completely Randomized Design (CRD) method with 5 treatments and 4 repetitions. Those treatments are feeding chickens without Moringa leaves powder supplementation (P0), feeding with 3% Moringa leaves powder supplementation (P1), feeding with 6% Moringa leaves powder supplementation (P2), feeding with 9% Moringa leaves powder supplementation (P3) and with 12% moringa leaves powder supplementation (P4). Each treatment was repeated 4 times, in which each repetition consisted of 3 broiler chickens
Unconventional London penetration depth in Ba(Fe0.93Co0.07)2As2 single crystals
The London penetration depth, , has been measured in several
single crystals of Ba(FeCo)As. Thermodynamic,
electromagnetic, and structural characterization measurements confirm that
these crystals are of excellent quality. The observed low temperature variation
of follows a power-law, with , indicating the existence of normal quasiparticles down to at least
. This is in contrast to recent penetration depth measurements on
single crystals of NdFeAsOF and SmFeAsOF, which
indicate an anisotropic but nodeless gap. We propose that a more
three-dimensional character in the electronic structure of
Ba(FeCo)As may lead to an anisotropic wave gap
with point nodes that would explain the observed .Comment: 4 page
Orphan Nuclear Receptor Nur77 Inhibits Cardiac Hypertrophic Response to Beta-Adrenergic Stimulation.
The orphan nuclear receptor Nur77 plays critical roles in cardiovascular diseases, and its expression is markedly induced in the heart after beta-adrenergic receptor (β-AR) activation. However, the functional significance of Nur77 in β-AR signaling in the heart remains unclear. By using Northern blot, Western blot, and immunofluorescent staining assays, we showed that Nur77 expression was markedly upregulated in cardiomyocytes in response to multiple hypertrophic stimuli, including isoproterenol (ISO), phenylephrine (PE), and endothelin-1 (ET-1). In a time- and dose-dependent manner, ISO increases Nur77 expression in the nuclei of cardiomyocytes. Overexpression of Nur77 markedly inhibited ISO-induced cardiac hypertrophy by inducing nuclear translocation of Nur77 in cardiomyocytes. Furthermore, cardiac overexpression of Nur77 by intramyocardial injection of Ad-Nur77 substantially inhibited cardiac hypertrophy and ameliorated cardiac dysfunction after chronic infusion of ISO in mice. Mechanistically, we demonstrated that Nur77 functionally interacts with NFATc3 and GATA4 and inhibits their transcriptional activities, which are critical for the development of cardiac hypertrophy. These results demonstrate for the first time that Nur77 is a novel negative regulator for the β-AR-induced cardiac hypertrophy through inhibiting the NFATc3 and GATA4 transcriptional pathways. Targeting Nur77 may represent a potentially novel therapeutic strategy for preventing cardiac hypertrophy and heart failure
Vortex phase diagram of Ba(Fe0.93Co0.07)2As2 single crystals
Detailed measurements of the global and local electromagnetic properties of
Ba(FeCo)As single crystals are reported. Analysis
of the irreversible magnetic response provides strong evidence for similar
vortex physics in this Fe-based pnictide superconductor to the high-
cuprates, such as Y-Ba-Cu-O or Nd-Ce-Cu-O. In particular, we have found a
nonmonotonic "fishtail" magnetization in loops and its signature
is also present in scans. The supercurrent density is evaluated
by using several techniques, including direct transport measurements. At 5 K we
estimate its value to be a moderate
A/cm. Analysis of the magnetic relaxation is consistent with the collective
pinning and creep models (weak pinning and fast creep) and suggests a crossover
from the collective to the plastic creep regime in fields exceeding the value
corresponding to the maximum in fishtail magnetization
Plasmon-phonon coupling in large-area graphene dot and antidot arrays
Nanostructured graphene on SiO2 substrates pave the way for enhanced
light-matter interactions and explorations of strong plasmon-phonon
hybridization in the mid-infrared regime. Unprecedented large-area graphene
nanodot and antidot optical arrays are fabricated by nanosphere lithography,
with structural control down to the sub-100 nanometer regime. The interaction
between graphene plasmon modes and the substrate phonons is experimentally
demonstrated and structural control is used to map out the hybridization of
plasmons and phonons, showing coupling energies of the order 20 meV. Our
findings are further supported by theoretical calculations and numerical
simulations.Comment: 7 pages including 6 figures. Supporting information is available upon
request to author
Anomalous Lattice Vibrations of Single and Few-Layer MoS2
Molybdenum disulfide (MoS2) of single and few-layer thickness was exfoliated
on SiO2/Si substrate and characterized by Raman spectroscopy. The number of
S-Mo-S layers of the samples was independently determined by contact-mode
atomic-force microscopy. Two Raman modes, E12g and A1g, exhibited sensitive
thickness dependence, with the frequency of the former decreasing and that of
the latter increasing with thickness. The results provide a convenient and
reliable means for determining layer thickness with atomic-level precision. The
opposite direction of the frequency shifts, which cannot be explained solely by
van der Waals interlayer coupling, is attributed to Coulombic interactions and
possible stacking-induced changes of the intralayer bonding. This work
exemplifies the evolution of structural parameters in layered materials in
changing from the 3-dimensional to the 2-dimensional regime.Comment: 14 pages, 4 figure
Iron pnictides: Single crystal growth and effect of doping on structural, transport and magnetic properties
We demonstrate the preparation of large, free standing iron pnictide single
crystals with a size up to 20 x 10 x 1 mm3 using solvents in zirconia crucibles
under argon atmosphere. Transport and magnetic properties are investigated to
study the effect of potassium doping on the structural and superconducting
property of the compounds. The spin density wave (SDW) anomaly at Ts ~138 K in
BaFe2As2 single crystals from self-flux shifts to Ts ~85 K due to Sn solvent
growth. We show direct evidence for an incorporation of Sn on the Fe site. The
electrical resistivity data show a sharp superconducting transition temperature
Tc~38.5 K for the single crystal of Ba0.68K0.32Fe2As2. A nearly 100% shielding
fraction and bulk nature of the superconductivity for the single crystal were
confirmed by magnetic susceptibility data. A sharp transition Tc~25 K occurred
for the single crystal of Sr0.85K0.15Fe2As2. There is direct evidence for a
coexistence of the SDW and superconductivity in the low doping regime of
Sr1-xKxFe2As2 single crystals. Structural implications of the doping effects as
well as the coexistence of the two order parameters are discussed.Comment: 22 pages, 9 figure
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