5,526 research outputs found
Spleen-Yang-deficiency patients with polycystic ovary syndrome have higher levels of visfatin
AbstractObjectiveTo study serum visfatin levels in women with polycystic ovary syndrome (PCOS) grouped by Traditional Chinese Medicine (TCM) patterns. To study the correlations of serum visfatin levels with homeostatic model assessment insulin resistance (HOMA-IR), fasting plasma glucose (FPG), fasting insulin (FINS), body mass index (BMI), testosterone (T), total cholesterol (TC), and triglycerides (TG).MethodsTwo hundred and twelve PCOS patients were placed into the following TCM pattern subgroups: Kidney-Yang deficiency (KYD) group, Spleen-Yang deficiency (SYD) group, stagnant Liver-Qi transforming into heat (SLQTH) group, and Kidney-Yin deficiency (KYIND) group. The correlations between serum visfatin levels and HOMA-IR, FPG, FINS, BMI, T, TC, and TG were analyzed.ResultsOf all patients with PCOS, there were 82 in the KYD group (38.6%), 67 in the SYD group (31.6%), 37 in the SLQTH group (17.5%), and 26 in the KYIND group (12.3%). Visfatin levels in all PCOS subgroups were higher than those in the control group (P<0.01 or P<0.05). Among these subgroups, the visfatin levels in the SYD group were significantly higher than those in the other three TCM pattern groups (P<0.05). There were no statistical differences among the remaining three pattern groups. The levels of BMI, FINS, HOMA-IR, T, and TG were significantly higher in all subgroups than those in the control group (P<0.05). There were no significant differences in FPG and TC between all PCOS subgroups and the control group (P>0.05). The SYD group had higher levels of FINS and HOMA-IR compared with the KYD, SLQTH, and KYIND groups (P<0.05). In all subgroups, after controlling for BMI, TG, TC, and age, visfatin was positively correlated with FINS (r= 0.197, P=0.015) and HOMA-IR (r=0.173, P=0.033), and was not correlated with T.ConclusionKYD and SYD patterns are most common in PCOS patients. Increased visfatin is a common pathophysiologic manifestation in PCOS patients. The SYD group had the highest levels of visfatin, and visfatin was positively correlated with FINS and HOMA-IR
Magic ratios for connectivity-driven electrical conductance of graphene-like molecules
Experiments using a mechanically-controlled break junction and calculations
based on density functional theory demonstrate a new magic ratio rule
(MRR),which captures the contribution of connectivity to the electrical
conductance of graphene-like aromatic molecules. When one electrode is
connected to a site i and the other is connected to a site i' of a particular
molecule, we assign the molecule a magic integer Mii'. Two molecules with the
same aromatic core, but different pairs of electrode connection sites (i,i' and
j,j' respectively) possess different magic integers Mii' and Mjj'. Based on
connectivity alone, we predict that when the coupling to electrodes is weak and
the Fermi energy of the electrodes lies close to the centre of the HOMO-LUMO
gap, the ratio of their conductances is equal to (Mii' /Mjj')2. The MRR is
exact for a tight binding representation of a molecule and a qualitative guide
for real molecules
TetraÂaquaÂbisÂ(1,10-phenanthroline-κ2 N,N′)strontium 5,5′-diazeneÂdiylÂditetraÂzolide
The title complex, [Sr(C12H8N2)2(H2O)4](C2N10), contains an [Sr(phen)2(H2O)4]2+ cation (phen is 1,10-phenanthroline) and a 5,5′-diazenediylditetraÂzolide anion (site symmetry 2). The Sr2+ cation (site symmetry 2) is coordinated by four N atoms from two chelating phen and four water molÂecules. In the crystal structure, the water molÂecules and the N atoms in the tetraÂzolide rings form an extensive range of O—H⋯N hydrogen bonds which link the complex into a two-dimensional structure. An adjacent layer further yields a three-dimensional supramolecular network by offset face-to-face π–π stacking interÂactions of the phen ligands [with centroid–centroid distances of 3.915 (2) and 4.012 (2) Å]. The two bridging N atoms of the anion are equally disordered about the twofold rotation axis
Multi-Receiver Quantum Dense Coding with Non-Symmetric Quantum Channel
A two-receiver quantum dense coding scheme and an -receiver quantum dense
coding scheme, in the case of non-symmetric Hilbert spaces of the particles of
the quantum channel, are investigated in this paper. A sender can send his
messages to many receivers simultaneously. The scheme can be applied to quantum
secret sharing and controlled quantum dense coding.Comment: To appear in Journal of the Korean Physical Societ
Eggs from Blue Peafowl and Hen
Abstract The study was undertaken to compare the quality and nutritional components of eggs from blue peafowl and Jingbai hen. The results showed that the average egg weight, eggshell thickness and egg yolk relative weight of blue peafowl eggs were significantly bigger than those of hen eggs (p < 0.01). Blue peafowl eggs contained significantly higher protein (p < 0.01), higher carbohydrate (p < 0.01), total amino acid and essential amino acid (p < 0.01), Zn (p < 0.01), Ca (p < 0.05) but lower fat (p < 0.01) and water (p < 0.05) than those in hen eggs. Amino acid content of blue peafowl eggs was in accordance with the ideals of the FAO mode. Blue peafowl eggs contained significantly higher V C and V B2 (p < 0.01) but lower V A and V E (p < 0.01) than hen eggs. 47 volatile compounds were found in raw blue peafowl eggs while only 30 in raw hen eggs; 60 volatile compounds were found in cooked blue peafowl eggs while only 41 in cooked hen eggs. Overall, most indices of qualities and nutrient components of blue peafowl eggs were not inferior to hen eggs
Entanglement control in one-dimensional random XY spin chain
The entanglement in one-dimensional random XY spin systems where the
impurities of exchange couplings and the external magnetic fields are
considered as random variables is investigated by solving the different
spin-spin correlation functions and the average magnetization per spin. The
entanglement dynamics near particular locations of the system is also studied
when the exchange couplings (or the external magnetic fields) satisfy three
different distributions(the Gaussian distribution, double-Gaussian
distribution, and bimodal distribution). We find that the entanglement can be
controlled by varying the strength of external magnetic field and the different
distributions of impurities. Moreover, the entanglement of some
nearest-neighboring qubits can be increased for certain parameter values of the
three different distributions.Comment: 13 pages, 4 figure
First-principles calculation of topological invariants Z2 within the FP-LAPW formalism
In this paper, we report the implementation of first-principles calculations
of topological invariants Z2 within the full-potential linearized augmented
plane-wave (FP-LAPW) formalism. In systems with both time-reversal and spatial
inversion symmetry (centrosymmetric), one can use the parity analysis of Bloch
functions at time-reversal invariant momenta to determine the Z2 invariants. In
systems without spatial inversion symmetry (noncentrosymmetric), however, a
more complex and systematic method in terms of the Berry gauge potential and
the Berry curvature is required to identify the band topology. We show in
detail how both methods are implemented in FP-LAPW formalism and applied to
several classes of materials including centrosymmetric compounds Bi2Se3 and
Sb2Se3 and noncentrosymmetric compounds LuPtBi, AuTlS2 and CdSnAs2. Our work
provides an accurate and effective implementation of first-principles
calculations to speed up the search of new topological insulators
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