Duplex Hecke Algebras of type B

As a sequel to [14], in this article we first introduce a so-called duplex Hecke algebras of type B which is a Q(q)-algebra associated with the Weyl group W (B) of type B, and symmetric groups S_l for l = 0, 1, . . . ,m, satisfying some Hecke relations. This notion originates from the degenerate duplex Hecke algebra arising from the course of study of a kind of Schur-Weyl duality of Levi-type, extending the duplex Hecke algebra of type A arising from the related q-Schur-Weyl duality of Levi-type. A duplex Hecke algebra of type B admits natural representations on certain tensor spaces. We then establish a Levi-type q-Schur-Weyl duality of type B, which reveals the double centralizer property between such duplex Hecke algebras and {\i}quantum groups studied by Bao-Wang in [1].Comment: 17 pages. To appear in Journal of Algebra and its Application

Management of intractable epistaxis in patients who received radiation therapy for nasopharyngeal carcinoma

To report clinical manifestations, bleeding point localization, and outcomes of management in 16 patients with 16 instances of intractable epistaxis after radiation therapy for nasopharyngeal carcinoma. Retrospective chart review of 16 patients with nasopharyngeal carcinoma (mean age 52.06 ± 14.37 years) with 16 instances of intractable epistaxis during the past 5 years, whose diagnosis was confirmed by angiography (n = 10) or MRI/CT imaging studies and clinical manifestations (n = 6). The mean radiation dose to the affected carotid artery was 101.37 ± 34.85 Gy. Bleeding points were detected in the internal carotid artery (n = 8) or external carotid artery (n = 8). Detachable balloons were used in one affected artery for vascular occlusion; six were treated using an absorbable gelatin sponge (n = 4) or microcoils (diameter 1 mm) (n = 2). Endovascular embolization was successful in seven radiation carotid blowout syndromes with cessation of hemorrhage. One patient underwent external carotid artery ligation and one patient recovered without treatment. The clinical follow-up was 3 months. Therapeutic endovascular embolization of intractable epistaxis is both efficient and safe. It should be considered as the primary treatment modality in intractable epistaxis of nasopharyngeal carcinoma

The effect of TrkA signaling pathway on the expressions of TRPC1，TRPC3 in 6-hydroxydopamine lesioned rat treated by electroacupuncture

Objective: We investigate the effect of TrkA signaling pathway on the expressions of transient receptor potential channel in 6-hydroxydopamine(6-OHDA) lesioned rat treated by electroacupuncture and to explore the role of trkA signaling pathway and TRP subfamily in the pathogenesis of Parkinson's disease (PD), which would reveals the mechanisms of electroacupuncture (EA) neuroprotective effect. Methods:  The experimental models were established by unilateral injection of 6-OHDA into the left medial forebrain bundle (MFB).TrkA signaling pathway inhibitor K252a was infected into MFB through two small burr holes in the skull to block trkA signal.The change of TRPC1 and TRPC3 expressions was detected by use of immunohistochemistry and RT-PCR as well as TUNEL for cell apoptosis. Results:  The expressions of TRPC1 and TRPC3 in the substantia nigra (SN) of the 6-OHDA lesioned rat were significantly reduced. Compared with PD model group, TRPC1 and TRPC3 expressions were significantly increased in the EA group. There was no statistically significance in TRPC1 and TRPC3 expressions between K252a and PD model groups (P> 0.05). The number of apoptotic cells in SN increased 54.5% in the PD model rats, while positive apoptotic cells were significantly reduced in the EA group. There was no statistically significance in apoptotic cells between K252a and PD model groups (P>0.05). Conclusion:  TRPC1 and TRPC3 expressions downregulated in the SN of the 6-OHDA lesioned rat, which was accompanied by apoptosis increase in the SN. EA treatment could reverse this effect, and trkA signaling pathway inhibitors K252a can attenuate the neuroprotective effect of EA. It suggested that TRPC1 and TRPC3 may play an important role in the pathogenesis of PD, and certain TRPC subfamily expressions change may be associated with the pathogenesis of PD. Its expression might be subject to trkA signaling pathway, and this signal pathway may be the regulation target for EA neuroprotection.目的 观察trkA信号通路调控对电针处理的6-羟多巴胺(6-OHDA)损伤大鼠黑质瞬时受体势通道亚族TRPC1、TRPC3表达的影响，探讨trkA信号通路及TRPC1、TRPC3在帕金森病(PD)发病机制中的作用，揭示电针干预发挥神经保护效应的机制。方法 采用6-OHDA偏侧毁损方法建立PD大鼠模型，利用trkA信号通路抑制剂K252a立体定向注入左侧大鼠前脑束阻断trkA信号，用免疫组织化学法和RT-PCR法检测大鼠黑质区TRPC1、TRPC3基因表达的变化，并利用TUNEL检测黑质区细胞的凋亡情况。结果 模型组大鼠黑质区TRPC1和TRPC3基因表达显著减少，电针组大鼠黑质区TRPC1和TRPC3 基因表达较模型组显著增加；K252a组大鼠黑质区TRPC1、TRPC3表达明显减少，与模型组比较差异无统计学意义（P>0.05）。与电针组比较，模型组大鼠黑质区凋亡阳性细胞数目增加54.5%，电针组凋亡阳性细胞显著减少；而K252a组凋亡阳性细胞数目与模型组比较差异无统计学意义（P>0.05）。结论 6-OHDA损伤大鼠黑质区TRPC1、TRPC3基因表达下调，同时黑质区细胞凋亡增加。电针干预能够逆转这一变化，trkA信号通路抑制剂K252a能削弱电针的神经保护作用。TRPC某些亚族基因如TRPC1、TRPC3可能在PD的发病中扮演重要角色。TRPC1、TRPC3的表达可能受trkA信号通路的调控，该信号通路可能是电针治疗PD发挥神经保护作用的重要调节靶点

Confirming the 115.5-day periodicity in the X-ray light curve of ULX NGC 5408 X-1

The Swift/XRT light curve of the ultraluminous X-ray (ULX) source NGC 5408 X-1 was re-analyzed with two new numerical approaches, Weighted Wavelet $Z$-transform (WWZ) and CLEANest, that are different from previous studies. Both techniques detected a prominent periodicity with a time scale of $115.5\pm1.5$ days, in excellent agreement with the detection of the same periodicity first reported by Strohmayer (2009). Monte Carlo simulation was employed to test the statisiticak confidence of the 115.5-day periodicity, yielding a statistical significance of $> 99.98$ (or $>3.8\sigma$). The robust detection of the 115.5-day quasi-periodic oscillations (QPOs), if it is due to the orbital motion of the binary, would infer a mass of a few thousand $M_\odot$ for the central black hole, implying an intermediate-mass black hole in NGC 5408 X-1.Comment: 6 pages, 2 figures, submitted to Research in Astronomy and Astrophysics (RAA

Study on electromagnetically induced transparency effects in Dirac and VO2_2 hybrid material structure

In this paper, we present a metamaterial structure of Dirac and vanadium dioxide and investigate its optical properties using the finite-difference time-domain (FDTD) technique. Using the phase transition feature of vanadium dioxide, the design can realize active tuning of the PIT effect at terahertz frequency, thereby converting from a single PIT to a double PIT. When VO$_2$ is in the insulating state, the structure is symmetric to obtain a single-band PIT effect; When VO$_2$ is in the metallic state, the structure turns asymmetric to realize a dual-band PIT effect. This design provides a reference direction for the design of actively tunable metamaterials. Additionally, it is discovered that the transparent window's resonant frequency and the Dirac material's Fermi level in this structure have a somewhat linear relationship. In addition, the structure achieves superior refractive index sensitivity in the terahertz band, surpassing 1 THz/RIU. Consequently, the concept exhibits encouraging potential for application in refractive index sensors and optical switches

Tris(2-ethyl-1H-imidazole-κN 3)(terephthalato-κO)zinc(II)

The title compound, [Zn(C8H4O4)(C5H8N2)3], has a neutral monomeric structure in which one terephthalate dianion and three 2-ethyl-1H-imidazole ligands coordinate to the ZnII ion in a distorted tetra­hedral geometry. The methyl group of one of the ethyl groups is disordered over two positions with occupancies of 0.66 (2) and 0.34 (2). In the crystal structure, mol­ecules are linked into a three-dimensional hydrogen-bonded network by inter­molecular N—H⋯O interactions involving the uncoordinated carboxyl­ate O atoms

Influence of different processing times on the quality of Polygoni Multiflora Radix by metabolomics based on ultra high performance liquid chromatography with quadrupole timeâ ofâ flight mass spectrometry

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/136757/1/jssc5378_am.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/136757/2/jssc5378.pd

Simultaneous Quantification of Gallic Acid, Bergenin, Epicatechin, Epicatechin Gallate, Isoquercitrin, and Quercetin-3-Rhamnoside in Rat Plasma by LC-MS/MS Method and Its Application to Pharmacokinetics after Oral Administration of Ardisia japonica

Ardisia japonica is a well-known traditional Chinese medicinal herb used as a diuretic, for treating cough and for stopping uterine bleeding. A simple, sensitive, and reliable LC-MS/MS method was developed to determine six active compounds in rat plasma and this method was further applied to the pharmacokinetic study of these compounds after oral administration of Ardisia japonica extract. Acetonitrile was used to precipitate the protein in the plasma samples. Using acetonitrile and formic acid aqueous solution (0.05%) as the mobile phase, the separation of the six compounds and internal standards was achieved at a flow rate of 300 μL min−1 on an Eclipse plus C18 column at an elution time of 16 min. A tandem mass spectrometer having an electrospray ionization (ESI) source was used in the detection of the analytes and internal standards using multiple reactions monitoring (MRM) in the negative ionization mode. The LLOQ was 2, 2, 4, 2, 1, and 0.4 ng mL−1 for gallic acid, bergenin, epicatechin, epicatechin gallate, isoquercitrin, and quercetin-3-rhamnoside, respectively. The validated method was applied to the pharmacokinetic study of gallic acid, bergenin, and quercetin-3-rhamnoside in rat plasma after oral administration of A. japonica extract to rats

Is tea consumption associated with the serum uric acid level, hyperuricemia or the risk of gout? A systematic review and meta-analysis

The methodological quality of cross-sectional studies in accordance with the Newcastle-Ottawa Scale (NOS). Table S2. The methodological quality of cohort studies in accordance with the Newcastle-Ottawa Scale (NOS). Table S3. The methodological quality of case–control studies in accordance with the Newcastle-Ottawa Scale (NOS). (DOCX 19 kb