Large Anomalous Hall Conductivity Derived from an f-Electron Collinear Antiferromagnetic Structure.

Appropriate symmetry breaking generates an anomalous Hall (AH) effect, even in antiferromagnetic (AFM) materials. Itinerant magnets with d electrons are typical examples that show a significant response. By contrast, the process by which a response emerges from f-electron AFM structures remains unclear.

Propensity score-matched analysis of the short-term outcomes of robotic versus laparoscopic surgery for rectal cancer.

Purpose: The advantages of robot-assisted rectal surgery (RARS) over conventional laparoscope-assisted rectal surgery (LARS) remain controversial. This study was performed to compare the short-term outcomes of RARS and LARS.

Methods: We retrospectively analyzed data of 207 patients who had undergone either RARS (n = 97) or LARS (n = 110) for rectal cancer (RC) from 2018 to 2020.

[A case report of tuberculous peritonitis in rectal cancer diagnosed by staging laparoscopy and post-treatment status at laparoscopic low-anterior resection].

An 87-year-old woman was referred to our hospital with early rectal cancer and massive ascites. Tuberculous peritonitis was suspected because positron emission tomography-computed tomography showed high uptake in the hypertrophic peritoneum. A staging laparoscopy was performed and the diagnosis of tuberculous peritonitis was established from inspection of histopathological biopsy specimens showing tiny white nodules on the peritoneum, Langhans giant cells, and epithelioid cell granulomas.

Quasilinear quantum magnetoresistance in pressure-induced nonsymmorphic superconductor chromium arsenide.

In conventional metals, modification of electron trajectories under magnetic field gives rise to a magnetoresistance that varies quadratically at low field, followed by a saturation at high field for closed orbits on the Fermi surface. Deviations from the conventional behaviour, for example, the observation of a linear magnetoresistance, or a non-saturating magnetoresistance, have been attributed to exotic electron scattering mechanisms. Recently, linear magnetoresistance has been observed in many Dirac materials, in which the electron-electron correlation is relatively weak.

Superconductivity and magnetic fluctuations developing in the vicinity of strong first-order magnetic transition in CrAs.

We report single crystal preparation, resistivity, and nuclear quadrupole resonance (NQR) measurements for new pressure-induced superconductor CrAs. In the first part, we present the difference between crystals made by different thermal sequences and methods, and show the sample dependence of superconductivity in CrAs. In the latter part, we show NQR data focusing the microscopic electronic state at the phase boundary between the helimagnetic and the paramagnetic phases.

Detection of an unconventional superconducting phase in the vicinity of the strong first-order magnetic transition in CrAs using (75)As-nuclear quadrupole resonance.

Pressure-induced superconductivity was recently discovered in the binary helimagnet CrAs. We report the results of measurements of nuclear quadrupole resonance for CrAs under pressure. In the vicinity of the critical pressure P(c) between the helimagnetic (HM) and paramagnetic (PM) phases, a phase separation is observed.

Magnetic excitations in iron chalcogenide superconductors.

Nuclear magnetic resonance and neutron scattering experiments in iron chalcogenide superconductors are reviewed to make a survey of the magnetic excitations in FeSe, FeSe Te and alkali-metal-doped Fe Se ( = K, Rb, Cs, etc). In FeSe, the intimate relationship between the spin fluctuations and superconductivity can be seen universally for the variations in the off-stoichiometry, the Co-substitution and applied pressure. The isovalent compound FeTe has a magnetic ordering with different wave vector from that of other Fe-based magnetic materials.

Protective effect of adeno-mediated human Bcl-xL gene transfer to the mouse liver in a partial ischemia/reperfusion model.

Background: The protective effect of heat preconditioning has been ascribed to the induction of heat shock proteins (HSP) in the liver. We detected an increase in Bcl-xL expression prior to HSP 70 expression in the rat liver after heat preconditioning. The net effect of overexpression of human Bcl-xL with a recombinant adenovector was estimated in a partial ischemia/reperfusion model of the mouse liver.

Pressure and magnetic field tuned quantum critical point in the Kondo antiferromagnet CePtZn.

We report magnetization, heat capacity and electrical resistivity measurements on CePtZn, which crystallizes in the orthorhombic TiNiSi type structure. Magnetization and electrical resistivity on the iso-structural series of compounds Ce(1-x)La(x)PtZn (x = 0.1, 0.

Ciliated hepatic foregut cyst with obstructive jaundice.

Ciliated hepatic foregut cysts (CHFCs) are rare congenital cystic lesion that are most often solitary, unilocular, and located in the subcapsular region of the medial segment of the left hepatic lobe. The mucoid fluid contents affect imaging studies and often make definitive diagnosis difficult. CHFCs are usually asymptomatic and found incidentally.

Connection between charge fluctuations and the coherent temperature in the heavy-fermion system SmOs4Sb12: a {121, 123}Sb NQR study.

We report {121, 123}Sb nuclear quadrupole resonance measurements under pressure in a novel heavy fermion (HF) system SmOs4Sb12. The nuclear spin-spin relaxation rate 1/T{2} exhibits a distinct peak near the coherent temperature of the Kondo effect. The isotope effect of 121Sb and 123Sb indicates that the peak in 1/T{2} is electrical in origin.

Nonmagnetic indenter-type high-pressure cell for magnetic measurements.

An indenter-type high-pressure cell has been developed for electric and magnetic measurements in low-temperature and high-magnetic-field environments. The maximum pressure achieved at low temperatures is more than 4.5 GPa, which is higher than that of a conventional piston-cylinder cell.

The blood flow velocity in the wall of the gallbladder is an indicator of the degree of inflammation in acute cholecystitis.

Background/aims: To determine whether gallbladder wall blood flow velocity reflected the degree of inflammation, these were measured in 2 acute cholecystitis groups treated with percutaneous transhepatic gallbladder aspiration (PTGBA) or antibiotics alone.

Methodology: Six patients underwent PTGBA and 5 patients were treated conservatively. Clinical indicators of systemic inflammation and blood flow velocity in the gallbladder wall were determined.

Adenovirus-mediated p53 gene transfer to the bile duct by direct administration into the bile in a rat cholangitis model.

Background: Hepatolithiasis is a common disease in East Asia and its aggravating factor is bile duct stenosis because of refractory cholangitis. This study investigated the feasibility of gene therapy for bile duct stenosis by administration of p53 adenoviral vectors into the bile.

Materials And Methods: Adenoviral vectors (AxCALacZ or AxCAhp53) were injected transpapillarily into the bile in the bile duct in a rat model of cholangitis.

Effects of posture change on the hemodynamics of the liver.

Background/aims: According to our experience, blood flow in the portal vein may alter according to body posture. It is reported that decreased portal venous flow immediately gives rise to significantly increased blood flow in the hepatic artery. To gain further insight into blood flow changes affected by posture, we examined blood flows in the portal vein, hepatic artery and hepatic vein at different postures.

Novel phase separation and spin dynamics of lightly doped La2-xSr2CuO4 probed by La-nuclear quadrupole resonance.

We report novel magnetic properties in the slightly hole-doped Mott-insulator La(2-x)SrxCuO4 via the La-nuclear quadrupole resonance (NQR) measurements. At x=0.018, the antiferromagnetic (AFM) La-NQR spectrum affected by internal fields comes out as the temperature decreases below T(N) approximately 150 K, whereas the nonmagnetic one persists to be observed down to a temperature T(f) approximately 20 K at which the nuclear-relaxation rate has a pronounced peak.

Evidence for unconventional strong-coupling superconductivity in PrOs4Sb12: an Sb nuclear quadrupole resonance study.

We report Sb-NQR results which evidence a heavy-fermion (HF) behavior and an unconventional superconducting (SC) property in Pr(Os4Sb12 with T(c)=1.85 K. The temperature (T) dependence of nuclear-spin-lattice-relaxation rate, 1/T(1), and NQR frequency unravel a low-lying crystal-electric-field splitting below T0 approximately 10 K, associated with Pr3+(4f(2))-derived ground state.

Evidence for strong-coupling s-wave superconductivity in MgB2: (11)B NMR Study.

We have investigated a gap structure in a newly discovered superconductor, MgB2, through measurement of the (11)B nuclear spin-lattice relaxation rate, (11)(1/T(1)). (11)(1/T(1)) is proportional to the temperature (T) in the normal state, and decreases exponentially in the superconducting (SC) state, revealing a tiny coherence peak just below T(c). The T dependence of 1/T(1) in the SC state can be accounted for by an s-wave SC model with a large gap size of 2Delta/k(B)T(c) approximately 5 which suggests it is in a strong-coupling regime.

Nmr evidence for coexistence of superconductivity and ferromagnetic component in magnetic superconductor RuSr2YCu2O8: 99,101Ru and 63Cu NMR.

From Ru- and Cu-NMR studies, we present evidence for coexistence of superconductivity and ferromagnetism in a cuprate superconductor RuSr2YCu2O8 (RuY1212). The observation of a large enhancement of a radio-frequency field for the Ru-NMR signal at zero field reveals the existence of a ferromagnetic (FM) component in the ordered RuO2 plane below a Curie temperature of TM = 150 K. Just below the onset temperature of superconductivity T(onset)c = 45 K, a remarkable decrease of the nuclear spin-lattice relaxation rate 1/T1 was observed within the ordered RuO2 plane as well as the CuO2 plane, revealing that the superconducting gap coexists with the FM component in the RuO2 plane on a microscopic scale.

Laparoscopic repair of intestinal malrotation complicated by midgut volvulus.

Intestinal malrotation is rare in older children and adults. We performed laparoscopic repair and treatment for a 13-year-old girl diagnosed as having intestinal malrotation complicated by midgut volvulus. Under laparoscopic vision, the midgut volvulus was untwisted by grasping and pulling the intestine; Ladd's band was divided and broadened; hepatic and splenic flexure of the colon was fixed; and finally an appendectomy was performed.