Recurrent atypical leiomyoma in bladder trigone,confused with uterine fibroids:A case report

BACKGROUND Tumors originating from the posterior bladder wall can be challenging to diagnose because they may mimic a mass from the uterine cervix.Atypical leiomyoma of the bladder trigone is extremely rare,with few reported cases,and requires caution during surgery to avoid damage to the adjacent ureter.Diagnostic surgery and confirmational pathology are essential to assess whether the tumor is malignant and relieve clinical symptoms.Herein,we describe a case of recurrent leiomyoma with focal atypia in the bladder trigone.CASE SUMMARY A 29-year-old woman with a uterine fibroid incidentally found at a regular checkup was referred to our hospital.Based on magnetic resonance imaging,either urinary bladder leiomyoma or protrusion of pedunculated uterine cervical fibroid into the bladder was suspected.This leiomyoma in the trigone of the bladder was completely excised by laparotomy,and the patient was discharged without complication.Follow-up outpatient ultrasonography identified tumor recurrence after four years.As focal atypia was identified previously,laparotomy was performed to confirm the pathology.A round solid mass was resected from the posterior bladder wall without injuring either ureteric orifice.This tumor was pathologically diagnosed as a leiomyoma without atypia.Three-year follow-up ultrasonography has revealed no recurrence.CONCLUSION Atypical leiomyoma in bladder trigone is rare and could be easily mistaken for fibroid in the uterine cervix.To confirm histopathology,surgical excision is mandatory and regular follow-up is necessary to detect recurrence.

Cerebral corridor creator for resection of trigone ventricular tumors:Two case reports

BACKGROUND Resection of deep intracranial tumors requires significant brain retraction,which frequently causes brain damage.In particular,tumor in the trigone of the lateral ventricular presents a surgical challenge due to its inaccessible location and intricate adjacent relationships with essential structures such as the optic radiation(OR)fibers.New brain retraction systems have been developed to minimize retraction-associated injury.To date,there is little evidence supporting the superiority of any retraction system in preserving the white matter tract integrity.This report illustrates the initial surgical excision in two patients using a new retraction system termed the cerebral corridor creator(CCC)and demonstrates its advantage in protecting OR fibers.CASE SUMMARY We report two patients with nonspecific symptoms,who had trigone ventricular lesions that involved the neighboring OR identified on preoperative diffusion tensor imaging(DTI).Both patients underwent successful surgical excision using the CCC.Total tumor removal was achieved without additional neurological deficit.DTI showed that the OR fibers were preserved along the surgical field.Preoperative symptoms were alleviated immediately after surgery.Clinical outcomes were improved according to the Glasgow-Outcome-Scale and Activity-of-Daily-Living Scale assessments.CONCLUSION In the two cases,the CCC was a safe and useful tool for creating access to the deep trigonal area while preserving the white matter tract integrity.The CCC is thus a promising alternative brain retractor.

综采工作面大断面切眼围岩稳定控制研究

综采工作面大断面切眼围岩的稳定性是影响综采工作面正常设备安装与回采的关键因素,以小保当一号煤矿112203综采工作面大断面切眼为研究对象,通过理论分析研究了112203综采工作面大断面切眼顶板变形机理及理论支护参数。采用离散元数值模拟软件建立了UDEC Trigon模型,研究了支护强度对二次成巷顶板裂隙演化规律、破坏模式和损伤程度的影响规律。数值模拟结果表明:合理的支护技术能够控制顶板微裂纹的扩展降低宏观裂隙的发育高度。长短锚索联合支护后顶板岩层中存在的岩石桥能够有效的限制宏观裂缝的形成以及它们之间的相互作用,特别是对交界面区域的重点支护能够降低二次成巷顶板裂隙的发育高度,减弱深部大断面切眼顶板岩层的损伤程度。现场试验表明,采用加长锚索以及单体液压支柱的补强支护后,112203综采工作面大断面切眼两帮移近量稳定在350 mm左右,顶底板移近量稳定在550 mm左右,顶板未出现明显离层,最大顶板离层量为2.4 mm。本文的理论分析及数值模拟有助于理解综采工作面大断面切眼顶板破坏模式,同时为其控制技术参数的设计提供了方法。

温庄煤业15106回风巷沿空掘巷围岩控制研究

以温庄煤业15106回风巷沿空掘巷的巷道布置及围岩控制为工程背景,借助现场实测、理论分析等手段,依据UDEC多边形破坏准则建立了Trigon数值模型,分析15106回风巷邻近采空区侧向支承应力分布范围,并进一步分析了不同宽度煤柱内应力、裂隙扩展特征及巷道围岩变形规律,基于裂隙闭合区长度确定了15106回风巷合理窄煤柱宽度为5 m。提出了高强锚杆锚索配合钢筋梯子梁支护技术,矿压观测结果表明,当煤柱宽度为5 m时巷道围岩的变形量较小,高强锚杆锚索支护结构能够稳定承载,同时煤柱中部存在一定长度的裂隙闭合区,验证了5 m煤柱宽度及围岩控制技术的合理性。

Microfluidic System for Synthesis of Trigonal Selenium Nanowires

A microfluidic system was developed for the synthesis of trigonal selenium（t-Se） nanowires, which was composed of a glass microchip coupled with a poly（methyl methacrylate）（PMMA） microchip. In the glass microchip, amorphous selenium（a-Se） colloid was prepared by reducing selenious acid with an excess amount of hydrazine at a temperature of 100 ℃. In the coupled PMMA microchip, a-Se was transformed into more stable t-Se seeds via sonication at room temperature. The residence time of the reactants in both microchips was optimized by varying the dimension and length of the microchannel each. The t-Se nanowires were formed by anisotropic growth of selenium crystallite during sonication and aging under the assistance of β-cyclodextrin（β-CD）. Various stages of the nanowires＇ growth were investigated. The as-synthesized products were characterized by powder X-Ray diffraction（XRD）, Raman spectroscopy, scanning electron microscopy（SEM）, transmission electron microscopy（TEM） and selected-area electron diffraction（SAED）.

孤岛工作面区段煤柱承载特性演化规律研究

孤岛工作面矿压显现强烈,巷道支护困难。采用合理技术解决孤岛工作面回采问题,对提高煤炭资源回采率具有重要意义。以8105孤岛工作面进风巷为工程背景,通过数值模拟方法,分析了掘进和回采期间不同宽度煤柱内应力和裂隙分布特征,得到了孤岛工作面区段煤柱承载特性演化规律,最终确定煤柱宽度为7 m。通过工业性实验发现巷道掘进期间,巷道整体变形量在预计范围内,验证了煤柱宽度的合理性。

基于UDEC Trigon模型分析采动对深部巷道的破坏机理

针对正利煤业14103工作面轨道顺槽服务期间受多次扰动产生变形破坏的问题,建立UDEC Trigon模型,分析巷道破坏机理发现,受巷道掘进、上工作面回采、本工作面回采三次采动影响后,采动应力叠加,两帮垂直应力高达100 MPa,应力集中系数为4.7,高应力导致煤岩体破坏,产生大量的裂隙,煤岩块产生显著位移,锚杆弯曲变形失效,巷道发生严重变形破坏。

综放工作面大跨度切眼支护参数优化

以某矿3107综放工作面大跨度切眼为研究对象,现场钻孔窥视分析了原支护参数下顶板裂隙发育规律,通过建立UDEC Trigon数值计算模型,对比了无支护及原支护参数下顶板破断情况、剪切裂隙和拉伸裂隙分布规律,在此基础上提出了补强锚索的优化支护参数。数值模拟及现场应用验证了优化支护参数能够有效控制顶板浅部以及深部裂隙的扩展,有效控制大跨度切眼围岩稳定。

Analysis of Ground-State Zero-Field Splitting for Mn^(2+) in ZnNbOF_(5)·6(H_(2)O) and CoNbOF_(5)·6(H_(2)O)

The electron paramagnetic resonance spectra of trigonal Mn^(2+)centers in ZnNbOF_(5)·6(H_(2)O)and CoNbOF_(5)·6(H_(2)O)crystals are studied on the basis of the complete energy matrices for a d5 configuration ion in a trigonal ligand field.It is demonstrated that the local lattice structure around a trigonal Mn2+center has an elongation distortion along the crystalline c3 axis,and when Mn2+is doped in the ZnNbOF_(5)·6(H_(2)O)and CoNbOF_(5)·6(H_(2)O)crystals,there is a similar local distortion.From the EPR calculation,the local lattice structure parameters for trigonal Mn2+centers in ZnNbOF_(5)·6(H_(2)O)and CoNbOF_(5)·6(H_(2)O)are determined.

Synthesis and Crystal Structure of a Heptanuclear Trigonal Prismatic Cluster {PrCu_6} with Glycine and Imidazole as Ligands

A new heptanuclear trigonal prismatic cluster [PrCu6(μ3-OH)3(Gly)6im6](ClO4)6 was synthesized through the self-assembly of Pr3+, Cu2+, glycine and imidazole in aqueous solution and characterized by X-ray structure analysis. The compound belongs to the trigonal R3 space group with a = b = 15.8761(2), c = 23.4943(5) ?, V = 5128.4(1) ?3, Z = 3, Dc = 1.965 g/cm3, μ = 2.869 mm-1, F(000) = 3012, the final R = 0.0332 and wR = 0.0844 for 3596 independent reflections. In the cation, the Pr3+ ion is situated at the center of a prism formed by six copper atoms and coordinates to nine oxygen atoms with a tricapped trigonal prismatic coordination polyhedron. Six glycine ligands and six imidazole terminal ligands participate in constructing the cluster.

Synthesis and Crystal Structure of Fe(aapo)_2Cl_3(aapo=2-Acetylamino Pyridine N-Oxide)

The complex Fe(aapo)2Cl3 with chemical formula C14H16Cl3FeN4O4 was obtained by the reaction of FeCl36H2O with apoHCl (apo = 2璦mino pyridine N璷xide) in acetonitrile. The result shows that CH3CN has been hydrolysised with the water from FeCl36H2O dissolving, and then the hydrolysised product condenses with apo to give aapo. A single-crystal X璻ay study of Fe(aapo)2Cl3 shows it belongs to the monoclinic system, space group C2/c with a = 15.873(3), b = 10.322(2), c = 11.987(2) ? b = 106.35(1), V = 1884.5(6) 3, Z = 4, Mr = 466.51, Dc = 1.644 g/cm3, m(MoKa) = 1.253 mm-1, F(000) = 948, R = 0.0377 and wR = 0.0749 for 1262 observed reflections with I > 2(I). Fe (Ⅲ) is coordinated by a trigonal bipyramidal geometry with three chlorine atoms lying on the equatorial plane and two oxygen atoms connected with the nitrogen atoms of pyridine rings occupying the axial positions, while the iron and Cl(1) atoms lie on the crystallographic 2-fold axis. The dihedral angle of two pyridine rings is 71.74(9). There exist N(2)H(2)…O(1)?hydrogen bonds in the crystal structure.

Crystal Structure of 2-Germatranylmethyl-N-(4'-methylphenyl) succinimide

The title crystal of 2-germatranylmethyl-N- (4'-methylphenyl)succinimide (C18H24GeN2O5) was determined by single crystal X-ray diffraction- The crystalbelongs to the orthorhombic system, space group P212121 with Mr = 420. 99, a= 6. 716(1), b=22- 860(8), c= 11. 891 (3) A, V= 1826(1) A3, Z=4,Dx= 1. 53 Mg. m-3,A= 0. 71073A, μ= 1. 684 mm-l, and F(000) =872. The structure was solved by direct methods. The final refinement is converged with unweighted and weighted agreement factors of 0. 047 and 0. 064 for 1610 observed reflections with I≥3δ(I). The results of structure analysis indicate that the framework of this five-coordinated germanium compound is a distorted trigonal bipyramid(TBP).

Comparison of Si_n^+ and Ge_n^+(n=2―15) Cationic Structures

We designed and optimized a large number of the isomers of Si12＋ at the level of density functional theory （DFT）-B3LYP/6-311＋＋G（d） using the Gaussian 03 software package. An unambiguous structure of the Si12＋ cluster is presented, whose IR spectrum agrees well with the experiment result. The most stable geometric structures of Gen＋（n=2―15） clusters were determined by the all-electron PBE/DND method in DMol3 of the Material Studio Package, and compared with those of the corresponding Sin＋ geometries. Most structures of Gen＋ and Sin＋ are similar except the ones of those for n=9, 12, 13 and 14, and the pentagonal bipyramid motif and the tri-capped trigonal prism（TTP） motif often appear in the Sin＋ and Gen＋（n=7―15） structures（except for Si14＋）.

EDESR and ODMR of Impurity Centers in Nanostructures Inserted in Silicon Microcavities

We present the first findings of the new electrically- and optically-detected magnetic resonance technique [ED electron spin resonance (EDESR) and (ODMR)] which reveal single point defects in the ultra-narrow silicon quantum wells (Si-QW) confined by the superconductor δ-barriers. This technique allows the ESR identification without the application of the external cavity as well as a high frequency source and recorder, with measuring the only magnetoresistance (EDESR) and transmission (ODMR) spectra within frameworks of the excitonic normal-mode coupling (NMC) caused by the microcavities embedded in the Si-QW plane. The new resonant positive magnetoresistance data are interpreted here in terms of the interference transition in the diffusive transport of free holes respectively between the weak antilocalization regime in the region far from the ESR of a paramagnetic point defect located inside or near the conductive channel and the weak localization regime in the nearest region of the ESR of that defect.

Lifshitz Transition Including Many-Body Effects in Bi-Layer Graphene and Change in Stacking Order

We consider the AB-(Bernal) stacking for the bi-layer graphene (BLG) system and assume that a perpendicular electric field is created by the external gates deposited on the BLG surface. In the basis (A1, B2, A2, B1) for the valleyKand the basis (B2, A1, B1, A2) for the valley K′, we show the occurrence of trigonal warping [1], that is, splitting of the energy bands or the density of states on the kx - ky plane into four pockets comprising of the central part and three legs due to a (skew) interlayer hopping between A1 and B2. The hopping between A1 - B2 leads to a concurrent velocity v3 in addition to the Fermi velocity vF. Our noteworthy outcome is that the above-mentioned topological change, referred to as the Lifshitz transition [2, 3], is entirely bias-tunable. Furthermore, the many-body effects, which is known to yield logarithmic renormalizations [4] in the band dispersions of monolayer graphene, is found to have significant effect on the bias-tunability of this transition. We also consider a variant of the system where the A atoms of the two layers are over each other and the B atoms of the layers are displaced with respect to each other. The Fermi energy density of statesfor zero bias corresponds to the inverted sombrero-like structure. The structure is found to get deformed due to the increase in the bias.

Carboxytherapy and Platelet Rich Plasma： A New Therapy for Trigonitis, Abacterial and Interstitial Cystitis

Cystitis often appears even in absence of bacteria colonization. Trigonitis and interstitial inflammation are the most common morphological features of abacterial cystitis in young and post menopausal women. Arterial obstructive disease and bladder ischemia might play an important role in bladder dysfunction. Activated inflammatory cells produce ROS （radicals of oxygen）, NF kB seems involved in ROS synthesis. Clinical studies have indicated that high CO2 levels can impact upon peripheral tissue, reducing ischaemia, responsible of recurrent inflammation and consequently reducing oxydative phenomena. PRP （platelet-rich plasma） is a volume of fractionated plasma from the patient＇s own blood that contains platelet concentrate rich of alpha granules. PRP interacts tissue repair mechanisms by placing supra-physiological concentrations of autologous platelets at the site of tissue damage. This study proposes a single PRP transvaginal injection followed by 10 weekly applications of carboxytherapy, using subcutaneous injections of sterile CO2 gas. We have selected 6 Women （50-75 years）, affected by recurrent abacterial cystitis with Pain and urge incontinence. All patients showed a subjective sensible reduction of symptoms. After 2 months all patients have neither inflammatory symptoms nor endoscopic evidence of trigonitis. Preliminary qualitative results could encourage the use of carboxytherapy and PRP in treatment of abacterial and interstitial cystitis.

Ba13(BS3)6(SnS6):Synthesis,Crystal Structure,Electronic Structure,and Optical Property

A new zero-dimensional（0D） thioborate compound Ba（13）（BS3）6（SnS6）, the first one in the AE/B/Sn/Q（AE=alkali-earth metals; Q=S, Se, Te） family, has been synthesized by conventional high-temperature solid-state reaction. It crystallizes in the trigonal space group of R3（No. 148） with a=b=21.4634（6） , c=8.3653（5） , V=3337.4（2） 3, Z=3, Mr=2738.41, Dc=4.088 g/cm3, μ=12.977 mm（-1）, F（000）=3576, the final R=0.0208 and w R=0.0505 with I 〉 2σ（I）, 3.28〈θ〈27.49°, w=1/[σ2（Fo2） ＋（0.0253P）2 ＋ 0.0000P], where P =（Fo2 ＋ 2Fc2）/3, S=1.051,（Δρ）max=0.639 and（Δρ）min=–1.195 e/3. The structure is constructed by discrete [BS3]（3–） trigonal planes and isolated [SnS6]（8–） octahedra with Ba（2＋） cations filled among them. The IR spectrum indicates the presence of lighter element boron. Its optical band gap shown by the UV-Vis-near-IR spectrum is about 2.69 e V, which agrees well with the electronic structure calculation.

Electronic Transport Properties of Transition-Metal Terminated Trigonal Graphene Nanoribbons

With the non-equilibrium Green’s function method and density functional theory, we have studied the electronic properties of trigonal graphene nanoribbons, with Fe terminal and H terminal, coupled to gold electrodes. Rectification behavior can be observed when the electrode-molecule contact distance is larger than 2.2 &Aring. The electronic transport is greatly improved in case of Fe terminal which is analyzed in terms of transmission spectra and density of states.

Three New Hydrogenosuccinate and Succinate Adducts Complexes:Synthesis and Spectroscopic Study

One new hydrogenosuccinate and two succinate adduct and complex have been synthesized and studied by infrared,UV-Visible and NMR(Nuclear Magnetic Resonance Spectroscopy)^(119)Sn spectroscopies.The suggested structure is discrete,the hydrogenosuccinate behaving as a monodentate ligand or only involved in hydrogen bonding,the environment around the magnesium centre being triangular(compound 3).The succiate anion is a monochelating ligand(compound 1 and 2).In all the suggested structures,when extra hydrogen bonds are considered,supramolecular architectures are obtained(compound 2 and 3).

沿空留巷不均衡承载围岩控制技术

针对新元煤矿3414工作面沿空巷道不均衡承载现象,结合3414工作面生产地质条件,建立巷道承载力学模型和UDEC Trigon数值计算模型,理论计算得到巷道不均衡承载系数k_σ为2.93,表明巷道实体煤帮承受荷载大于充填体帮,巷道围岩裂隙以剪切裂隙为主,充填区域顶板在基本顶和充填体强大的垂直挤压力作用下,发生张拉裂破坏和剪切破坏,并沿充填体内侧断裂,表明该区域为沿空留巷围岩控制的薄弱环节。工业试验表明,采用及时支护充填区域顶板的围岩综合控制技术,可有效控制沿空留巷围岩稳定。