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Hepatic involvement in children with acute bronchiolitis

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World Journal of Hepatology 2022年第10期14卷 1907-1919页

作者： Hasan M Isa Asma Z Hasan sara I Khalifa sana s Alhewaizem Abdulrahman d Mahroofi Fatema N Alkhan Mohammed Al-Beltagi department of Pediatrics Salmaniya Medical ComplexManama 12Bahrain department of Pediatrics Arabian Gulf UniversityManama 26671Bahrain department of Pediatrics Sulwan Psychiatric HospitalManama 973Bu QuwahBahrain department of Pediatrics Dream Reem Medical CenterMuharraq 50573Bahrain department of Pediatrics King Hamad University HospitalMuharraq 24343Bahrain department of Pediatrics Faculty of MedicineTanta UniversityTanta 31527AlgharbiaEgypt department of Pediatrics University Medical CenterKing Abdulla Medical CityArabian Gulf UniversityManama 26671Bahrain department of Pediatrics University Medical CenterDr.Sulaiman Al-Habib Medical GroupBahrainManama 26671Bahrain

BACKGROUNd Respiratory syncytial virus(RsV)is a prevalent cause of lower respiratory tract *** may be associated with hepatocellular involvement,as indicated by increased liver enzymes aspartate aminotransferase and alanine transaminase(ALT).AIM To evaluate the rate of increased liver enzyme levels in children with acute bronchiolitis and correlate them with clinical,laboratory,and radiological *** The study was a retrospective review of the medical records of children who presented with acute bronchiolitis when admitted to the Pediatric department,salmaniya Medical Complex,the Kingdom of Bahrain,between 2019 and *** collected the demographic data,the clinical presentation,the laboratory and radiological findings,and the clinical *** compared the patients with elevated liver enzymes to those with normal levels at the time of presentation and at *** We included 166(57.8%)of 287 patients with acute bronchiolitis who fulfilled the inclusion ***-three(56%)patients were *** median age at presentation was 3.4(interquartile range 1.1 to 12.4)***-four(28%)patients tested positive for RsV,which was confirmed in 15 of them(28%)by *** findings of 161 patients tested at presentation showed high ALT levels in 14(8.7%)patients and normal ALT in 147(91.3%).Coagulation profiles were measured in 46(27.7%)of 166 *** prothrombin time was present in 15(32.6%),a high international normalized ratio was present in 13(28.3%),and high activated partial thromboplastin time was present in three(6.5%).Thrombin time was elevated in nine(27.3%)of 33 ***(21.7%)of 23 patients with available radiological data had hepatomegaly;one of them had findings suggestive of fatty *** ALT had a significant association with lengthy hospital stays(Pd positive urine culture(Pseventy(42.2%)patients had documented follow-up with liver function tests over a median follow-up period of

关键词： involvement elevated bronchiolitis

Electrochemical behavior of Co-Cr and Ni-Cr dental cast alloys

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中国有色金属学会会刊：英文版 2009年第4期19卷 785-790页

作者： Viswanathan s. sAJI Han-Cheol CHOE department of dental Materials College of DentistryChosun University

The cast structures influencing the electrochemical corrosion behavior of Co-Cr and Ni-Cr dental alloys were studied using potentiodynamic polarization and AC impedance in 0.9% (mass fraction) NaCl solution at (37±1) ℃. The phase and microstructure of the alloys that were fabricated using two different casting methods viz. centrifugal casting and high frequency induction casting, were examined using X-ray diffraction analysis, scanning electron microscopy and energy dispersive spectroscopy. The roles of alloying elements and the passive film homogeneity on the corrosion resistance of Co-Cr-Mo and Ni-Cr-Mo dental cast alloys were reviewed. The results of electrochemical study show that the dependence of corrosion resistance on the microstructure associated with the casting methods is marginal. The Co-Cr alloy exhibits more desirable corrosion resistance properties than the Ni-Cr alloy. There is severe preferential dissolution of Ni-rich, Cr and Mo depleted zones in the Ni-Cr alloy.

关键词：镍铬合金合金铸造电化学行为牙科电化学腐蚀行为 X射线衍射分析 NaCl溶液钴

dolochar as a reductant in the reduction roasting of iron ore slimes

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International Journal of Minerals,Metallurgy and Materials 2017年第12期24卷 1341-1351页

作者： swagat s. Rath danda srinivas Rao Institute of Minerals and Materials Technology Council of Scientific&Industrial ResearchBhubaneswar 751013India

The present investigation examines the viability of dolochar, a sponge iron industry waste material, as a reductant in the reduction roasting of iron ore slimes, which are another waste generated by iron ore beneficiation plants. Under statistically determined optimum conditions, which include a temperature of 900°C, a reductant-to-feed mass ratio of 0.35, and a reduction time of 30–45 min, the roasted mass, after being subjected to low-intensity magnetic separation, yielded an iron ore concentrate of approximately 64 wt% Fe at a mass recovery of approximately 71% from the feed iron ore slime assaying 56.2 wt% Fe. X-ray diffraction analyses indicated that the magnetic products contain magnetite and hematite as the major phases, whereas the nonmagnetic fractions contain quartz and hematite.

关键词： iron ore slime reduction roasting dolochar reductant magnetic separation

Experimental Observation of Bright and dark solitons Mode-Locked with Zirconia-Based Erbium-doped Fiber Laser

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Chinese Physics Letters 2018年第2期35卷 25-28页

作者： A.M.Markom s.J.Tan H.Haris M.C.Paul A.dhar s.das s.W.Harun Faculty of Electrical Engineering Universiti Teknologi MARAMasai 81750Malaysia school of Engineering KDU University CollegeUtropolis GlenmarieShah Alam 40150Malaysia department of Electrical Engineering University of MalayaKuala Lumpur 50603Malaysia Fiber Optics and Photonics division CSIR-Central Glass and Ceramic Research InstituteKolkata 700032India

We demonstrate the generation of dark and bright solitons with our homemade zirconia-based erbium-doped fiber and graphene oxide（GO） saturable absorber in anomalous dispersion *** GO is fabricated using an abridged Hummer＇s method,which is combined with polyethylene oxide to produce a composite *** film is sandwiched between two optical ferrules and embedded in the laser cavity to enhance its birefringence and *** self-starting bright soliton is easily generated at pump power of 78 mW with the whole length cavity of 14.7 *** laser produces the bright pulse train with repetition rate,pulse width,pulse energy and central wavelength being 13.9 MHz,0.6 ps,2.74 p J and 1577.46 nm,***,by adding the 10 m of single mode fiber into the laser cavity,dark soliton pulse is *** the formation of dark pulse train,the measured repetition rate,pulse width,pulse energy and central wavelength are 8.3 MHz,20 ns and 4.98 p J and1596.82 nm,*** pulses operate in the anomalous region.

关键词： Zr EdF Experimental Observation of Bright and dark solitons Mode-Locked with Zirconia-Based Erbium-doped Fiber Laser

Recent advances in polymeric membranes for CO_2 capture

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Chinese Journal of Chemical Engineering 2018年第11期26卷 2238-2254页

作者： Yang Han W.s.Winston Ho William G.Lowrie department of Chemical and Biomolecular Engineering and department of Materials science and Engineering The Ohio State University

Membrane and membrane process have been considered as one of the most promising technologies for mitigating CO_2 emissions from the use of fossil fuels. In this paper, recent advances in polymeric membranes for CO_2 capture are reviewed in terms of material design and membrane formation. The selected polymeric materials are grouped based on their gas transport mechanisms, i.e., solution‐diffusion and facilitated transport. The discussion of solution‐diffusion membranes encompasses the recent efforts to shift the upper bound barrier, including the enhanced CO_2 solubility in several rubbery polymers and novel methods to construct shape-persisting macromolecules with unprecedented sieving ability. The carrier-bearing facilitated transport membranes are categorized based on the specific CO_2-carrier chemistry. Finally, opportunities and challenges in practical applications are also discussed, including post-combustion carbon capture(CO_2/N2), hydrogen purification(CO_2/H2), and natural gas sweetening(CO_2/CH4).

关键词： Carbon capture Polymeric membrane Gas separation

Increased syndecan-1 and glypican-3 predict poor perinatal outcome and treatment resistance in intrahepatic cholestasis

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Hepatobiliary & Pancreatic diseases International 2020年第3期19卷 271-276页

作者： Basak Gümüs Güler sibel Ozler department of Health sciences Istinye UniversityIstanbul 34010Turkey department of Perinatology Selcuk University Faculty of MedicineKonya 42130Turkey

Background:Intrahepatic cholestasis of pregnancy(ICP)increases the risk of adverse pregnancy *** study aimed to explore the association between serum syndecan-1 and glypican-3 levels and the adverse perinatal outcome as well as the responses to the treatment of ursodeoxycholic acid(UdCA).Methods:This prospective,case control study included 88 pregnant women(44 women with ICP and 44 healthy controls).The primary end points were the perinatal outcome and the response to UdCA therapy.A logistic regression model was used to identify the independent risk factors of adverse pregnancy outcomes and reduced response to UdCA ***:Women with ICP had significantly higher serum syndecan-1(1.27±0.36 ng/m L vs.0.98±0.50 ng/m L;P=0.003),glypican-3(1.78±0.13 ng/m L vs.1.69±0.16 ng/m L;P=0.004),AsT(128.59±1.44 vs.13.29±1.32 U/L;Pd ALT(129.84±1.53 vs.8.00±3.67 U/L;Ps compared with the *** increased levels of syndecan-1(OR=4.715,95%CI:1.554–14.310;P=0.006),glypican-3(OR=8.465,95%CI:3.372–21.248;P=0.007),ALT(OR=1.382,95%CI:1.131–1.690;P=0.002),and postprandial bile acid(PBA)(OR=3.392,95%CI:1.003–12.869;P=0.026)were correlated to *** adverse neonatal outcome was related to increased glypican-3(OR=4.275,95%CI:2.726–5.635;P=0.039),and PBA(OR=3.026,95%CI:1.069–13.569;P=0.037).Increases of syndecan-1(OR=7.464,95%CI:2.130–26.153,P=0.017)and glypican-3(OR=6.194,95%CI:2.951–13.002;P=0.025)were the risk factors of decreased response to UdCA ***:syndecan-1 and glypican-3 might be powerful determinants in predicting adverse perinatal outcome in patients with ICP,and they can be used to predict the response to the UdCA treatment.

关键词： Intrahepatic cholestasis of pregnancy syndecan-1 Glypican-3 Adverse perinatal outcome Response to UdCA

PAPR distribution Analysis at the Output of Nonlinear PAPR Reducers

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Journal of signal and Information Processing 2012年第4期3卷 465-468页

作者： désiré Guel Jacques Palicot sUPELEC/IETR Campus de Rennes Avenue de la Boulaie CS 47601 F-35576 Cesson-Sévigné cedex

Nonlinear PAPR reducers, such as clipping and companding techniques, are some simple methods used to reduce the Peak-to-Average Power Ratio (PAPR). In this paper, assuming that the baseband OFdM signal is characterized as a band-limited complex Gaussian process, we investigate the PAPR distribution of an OFdM signal when it is passed through a nonlinear PAPR reducer. The obtained PAPR distribution depends on the nonlinear function which characterizes the PAPR reducer. Later in this paper, we apply the obtained PAPR distribution in the clipping case. The comparisons made between the proposed distribution and that obtained thanks to computer simulations show good agreement.

关键词： Orthogonal Frequency division Multiplexing (OFdM) Peak-to-Average Power Ratio (PAPR) distribution Nonlinear PAPR Reducers

Effects of the phase variation and high-order momentum transfer components of NN amplitude on p-~4He elastic scattering

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Nuclear science and Techniques 2018年第1期29卷 65-76页

作者： I.M.A.Tag-Eldin M.M.Taha s.s.A.Hassan Nuclear Experimental Physics department Nuclear Research Center Atomic Energy Authority Mathematics and Theoretical Physics department Nuclear Research Center Atomic Energy Authority

Elastic scattering differential cross sections for a p- ~4He system are calculated within the framework of optical limit approximation of the Glauber multiple scattering model. Three different ranges for proton energy(E_(lab)), 19〈E_(lab)〈50 Me V, 100≤E_(lab)≤1730 Me V, and 45 ≤E_(lab)≤393 Ge V are considered. It is shown that the Pauli blocking fails to describe the data up to the proton energy, E_(lab)〈100 Me V. For higher proton energies, a qualitative agreement is obtained. The observed elastic scattering differential cross section is nicely reproduced in the whole range of scattering angles in the center of mass system up to Θ_(c.m.)〈200° for 19〈E_(lab) ≤100 Me V when the effect of both the nucleon–nucleon(NN) phase variation parameter γNN and higher-order momentum transfer components(λ_n; n = 1 and 2) of(NN) elastic scattering amplitude is included. In the range of 200 E_(lab) 1730 Me V, introducing λ_n plays a significant role in describing the data up to the momentum transfer, q^2≤1:2(Ge V/c)~***, it is found that considering only the effect of phase variation parameter, cNN, improved the agreement in the region of minima for elastic scattering differential cross section for 45≤E_(lab)≤393 Ge V. The values of cNNand kn as a function of incident proton energies are presented.

关键词： Elastic scattering Optical limit approximation Glauber multiple scattering model

Metallurgical analysis of a failed maraging steel shear screw used in the band separation system of a satellite launch vehicle

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defence Technology（防务技术） 2016年第5期12卷 380-387页

作者： s.V.s. Narayana MURTY sushant K. MANWATKAR E Ramesh NARAYANAN Material Characterization division Materials and Metallurgy Group Vikram Sarabhai Space Centre Trivandrum 695 022 India

Maraging steels have excellent combination of strength and toughness and are extensively used for a variety of aerospace applications. In one such critical application, this steel was used to fabricate shear screws of a stage separation system in a satellite launch vehicle. during assembly preparations, one of the shear screws which connected the separation band and band end block has failed at the first thread. Microstructural analysis revealed that the crack originated from the root of the thread and propagated in an intergranular mode. The failure is attributed to combined effect of stress and corrosion leading to stress corrosion cracking.

关键词： M250 grade maraging steel shear screw separation system Mermen band stress corrosion cracking