Erratum: Structural and Valence Changes of Europium Hydride Induced by Application of High-Pressure H_{2} [Phys. Rev. Lett. 107, 025501 (2011)].

This corrects the article DOI: 10.1103/PhysRevLett.107.025501.

Airborne endotoxin concentrations in indoor and outdoor particulate matter and their predictors in an urban city.

Endotoxins are an important biological component of particulate matter and have been associated with adverse effects on human health. There have been some recent studies on airborne endotoxin concentrations. We collected fine (PM2.5 ) and coarse (PM10-2.5 ) particulate matter twice on weekdays and weekends each for 48 hour, inside and outside 55 homes in an urban city in Japan. Endotoxin concentrations in both fractions were measured using the kinetic Limulus Amebocyte Lysate assay. The relationships between endotoxin concentrations and household characteristics were evaluated for each fraction. Both indoor and outdoor endotoxin concentrations were higher in PM2.5 than in PM10-2.5 . In both PM2.5 and PM10-2.5 , indoor endotoxin concentrations were higher than outdoor concentrations, and the indoor endotoxin concentrations significantly correlated with outdoor concentrations in each fraction (R2 =0.458 and 0.198, respectively). Indoor endotoxin concentrations in PM2.5 were significantly higher in homes with tatami or carpet flooring and in homes with pets, and lower in homes that used air purifiers. Indoor endotoxin concentrations in PM10-2.5 were significantly higher in homes with two or more children and homes with tatami or carpet flooring. These results showed that the indoor endotoxin concentrations were associated with the household characteristics in addition to outdoor endotoxin concentrations.

Survival outcomes of 220 consecutive patients with three-staged thoracoscopic esophagectomy.

Patients with thoracic esophageal cancer are often treated by minimally invasive esophagectomy. However, the long-term survival benefits of minimally invasive esophagectomy remain unclear. Two approaches are available for thoracoscopic surgery: one with the patient in the left lateral decubitus position (LLDP), and the other with the patient in the prone position (PP). We investigated the survival benefit of thoracoscopic esophagectomy according to the tumor stage and patient position during the thoracoscopic procedure. We reviewed the records of 220 consecutive patients with esophageal cancer treated from 1998 to 2012. In total, 146 and 74 patients were treated with thoracoscopic esophagectomy in the LLDP and PP, respectively. No patients were initially proposed to be candidates for esophagectomy by thoracotomy during the study period. Data collection was performed with a focus on survival and recurrent disease. Among all the 220 patients, the overall 5-year survival rates were 83.7%, 74.1%, 45.5%, 78.6%, 44.2%, 29.4% and 24.3% in the patients with pStage IA, IB, IIA, IIB, IIIA, IIIB and IIIC disease, respectively. Despite the greater number of dissected mediastinal lymph nodes in the PP procedure, there were no significant differences in the survival curves between the LLDP and PP procedures. The long-term results of thoracoscopic esophagectomy are comparable and acceptable. The PP procedure was not confirmed to offer a superior survival benefit to the LLDP procedure in this retrospective study.

Stroboscopic detection of nuclear resonance in an arbitrary scattering channel.

The theory of heterodyne/stroboscopic detection of nuclear resonance scattering is developed, starting from the total scattering matrix as a product of the matrix of the reference sample and the sample under study. This general approach holds for all dynamical scattering channels. In the forward channel, which has been discussed in detail in the literature, the electronic scattering manifests itself only in an energy-independent diminution of the scattered intensity. In all other channels, complex resonance line shapes of the heterodyne/stroboscopic spectra are encountered, as a result of the interference of electronic and nuclear scattering. The grazing-incidence case will be evaluated and described in detail. Experimental data of classical X-ray reflectivity and their stroboscopically detected resonant counterpart spectra on the [(nat)Fe/(57)Fe]10 isotope periodic multilayer and antiferromagnetic [(57)Fe/Cr]20 superlattice are fitted simultaneously.

Radial incision and cutting method for refractory stricture after nonsurgical treatment of esophageal cancer.

Strictures remaining after nonsurgical treatment for esophageal cancer are generally more refractory to endoscopic balloon dilation (EBD) when compared with anastomotic strictures. The aim of the present study was to evaluate the efficacy and safety of a radial incision and cutting (RIC) method for the treatment of refractory strictures after nonsurgical treatment of esophageal cancer. All subjects complained of grade 2 or worse dysphagia, even after at least 10 sessions of EBD. Between August 2009 and May 2012, eight consecutive patients with refractory esophageal stricture after nonsurgical treatments, including chemoradiotherapy (CRT) alone (n = 3), CRT followed by salvage endoscopic treatment (n = 3), or endoscopic submucosal dissection (ESD; n = 2), underwent the RIC procedure. After the RIC procedure, dysphagia in all the patients dramatically improved to grade 1 or 0 without any major complications; however, the long-term efficacy was unfavorable as only 37.5 % (3 /8) demonstrated adequate lumen patency at 3 months, and re-intervention was necessary in six patients (75 %).

Structural and valence changes of europium hydride induced by application of high-pressure H2.

Europium hydride EuH(x), when exposed to high-pressure H2, has been found to exhibit the following structural and valence changes: Pnma(x = 2, divalent) → P63/mmc(x = 2, 7.2-8.7 GPa) → I4/m(x > 2, 8.7-9.7 GPa) → I4/mmm(x > 2, 9.7 GPa-,trivalent). With a trivalent character and a distorted cubic fcc structure, the I4/mmm structure is the ß phase commonly observed for other rare-earth metal hydrides. Our study clearly demonstrates that EuH(x) is no longer an irregular member of the rare-earth metal hydrides.

Endoscopic submucosal dissection allows less-invasive curative resection for gastric tube cancer after esophagectomy - a case series.

Detection of early gastric tube cancers (GTCs) has increased with more detailed surveillance endoscopy using indigo carmine dye following esophagectomy. This retrospective study clarified the clinicopathological features and application of endoscopic submucosal dissection (ESD) for GTCs. Data collected for eight GTCs treated by ESD included clinical and pathological features and outcomes following ESD. Overall, eight GTCs were identified in seven (6.3 %) of 112 patients who underwent esophagectomy and gastric tube reconstruction. Almost all lesions were macroscopically type 0-IIa with mucosal to submucosal invasion, and seven GTCs were successfully resected en bloc by ESD. Submucosal invasion to > 500 microm was observed in one case with associated delayed perforation that was treated conservatively. No local recurrences of GTCs were observed. Detailed surveillance endoscopy using indigo carmine dye appears useful for diagnosing early-stage GTC. Furthermore ESD represents a feasible alternative to conventional endoscopic mucosal resection as a minimally invasive therapy for early-stage GTC.

Fast x-ray detector system with simultaneous measurement of timing and energy for a single photon.

We developed a fast X-ray detector system for nuclear resonant scattering (NRS) experiments. Our system employs silicon avalanche photo-diode (Si-APD) as a fast X-ray sensor. The system is able to acquire both timing and energy of a single X-ray photon simultaneously in a high rate condition, 106 counts per second for one Si-APD. The performance of the system was investigated in SPring-8, a synchrotron radiation facility in Japan. Good time resolution of 120 ps (FWHM) was achieved with a slight tail distribution in the time spectrum by a level of 10-9 at 1 ns apart from the peak. Using this system, we successfully observed the NRS from the 26.27-keV level of mercury-201, which has a half-life of 630(50) ps. We also demonstrated the reduction of background events caused by radioactive decays in a radioactive sample by discriminating photon energy.

Glycolipids in human lung carcinoma of histologically different types.

Glycolipids were isolated from primary human lung carcinoma tissue of various histologic types: adenocarcinoma, squamous cell carcinoma, and undifferentiated small cell carcinoma. Each type of carcinoma had a characteristic glycolipid pattern. The major glycolipids isolated were ceramide monohexosides, ceramide dihexosides, ceramide trihexosides, globoside, and hematoside. Squamous cell carcinoma and undifferentiated small cell carcinoma showed marked increases of ceramide monohexosides and dihexosides. Adenocarcinoma had a much higher level of the sulfatide (ceramide 3-sulfate-galactoside) as compared to squamous cell carcinoma, undifferentiated small cell carcinoma, or normal lung tissue. Embryonic tissue had more significant levels of sulfatide than did the other carcinomas. Adenocarcinoma had significantly lower levels of glycolipids due mainly to a decrease in the amount of ceramide monohexosides and dihexosides and hematoside.

Prevention of doxorubicin myocardial toxicity in mice by reduced glutathione.

The effect of reduced glutathione (GSH) on acute myocardial toxicity due to doxorubicin (DXR) was investigated. At 20 mg/kg i.p. DXR was 100% lethal to BALB/c X DBA/2 F1 mice. At 500 or 1000 mg/kg i.p. GSH significantly decreased the lethality (P less than 0.01). Electron micrographs of the myocardium from DXR-treated mice showed narrowing of myofibrils, edematous cytoplasm, and mitochondrial swelling which were detectable at day 2, was strongest at day 14, but had disappeared by day 56. Light microscopic examination revealed that intercellular spaces between myocardial cells were widened at day 56, indicating shrinking of myocardial cells. These changes were significantly decreased by treatment with GSH (500 mg/kg i.p.). Treatment with DXR (14 mg/kg) significantly decreased myocardial non-protein sulfhydryl content (P less than 0.02) and administration of GSH (500 mg/kg) prevented the drop of non-protein sulfhydryl levels due to DXR treatment. Thus it was considered that administration of exogenous GSH contributes to prevention of the acute myocardial toxicity of DXR by increasing extracellular GSH levels and intracellular GSH synthesis, which detoxifies DXR-oxygen metabolites. The administration of GSH did not interfere with the antineoplastic effect of DXR against L1210 mouse leukemia.

Characterization of natural killer cells cultured from human bone marrow cells.

Human bone marrow (BM) cells, depleted of nylon wool-adherent cells, T cells, and natural killer (NK) cells, were cultured in medium containing recombinant interleukin 2 (rIL2). After 21 or 24 days in culture, numerous lymphoid cells with multiple azurophilic granules and a morphology similar to large granular lymphocytes (LGL) were found. Two-color analysis of surface phenotype showed many of these cells to be NKH1-positive and a limited number of cells had other NK markers such as CD16, CD2, or CD8. The CD3 antigen was not coexpressed with NKH1. The cultured BM cells were cytotoxic for K562, Daudi, and Raji cell lines. The NKH1+, CD2-, CD3-, CD16- cells were sorted and, in addition to having the LGL morphology, were found to be cytotoxic for K562 cells (NK [K562]). The generation of NK(K562) activity was significantly suppressed by 5-bromodeoxyuridine plus ultraviolet light treatment, indicating that DNA synthesis is required. These experiments suggest that the described culture conditions allow differentiation of progenitor cells, into immature, but functionally active, NK cells.

Fibrinopeptide A (FPA) level and fibrinogen kinetics in patients with malignant disease.

FPA level, fibrinogen turnover rate, and fibrinolytic activity were studied on 18 patients with malignant disease. It was found that the FPA levels were significantly elevated and were correlated with fibrinogen turnover rate (r = 0.74, p less than 0.001) and FDP (r - 0.58, p less than 0.02). Estimated FPA turnover rate was also correlated with fibrinogen turnover rate (r = 0.70, p less than 0.001). These results suggest that fibrinogen catabolism in patients with malignant disease is related with thrombin proteolysis. However, ratios of 1/2 FPA turnover rate to fibrinogen turnover rate suggest that intravascular thrombin proteolysis is not the major determinant of fibrinogen catabolism. It is suspected that extravascular thrombin proteolysis is responsible for the elevation of plasma FPA level which is correlated with acceleration of fibrinogen catabolism.

Oxymetholone therapy in patients with familial antithrombin III deficiency.

Three patients with familial antithrombin III (ATIII) deficiency, who also have histories of thromboembolism, were treated with oxymetholone in combination with warfarin. Thrombolysis was observed in one patient with acute thrombosis of inferior vena cava during the oxymetholone and warfarin therapy. No further thromboembolic episodes occurred in these patients after initiation of warfarin with or without oxymetholone. The levels of plasma ATIII, alpha 1-antitrypsin, plasminogen and Cl-inactivator were significantly increased in all patients after the introduction of oxymetholone therapy. This suggests that oxymetholone augments anticoagulant and fibinolytic activity. Hence we consider that oxymetholone in combination with warfarin may be possible thrombolytic therapy in patients with familial ATIII deficiency.

Nuclear resonance scattering of synchrotron radiation by 40K

We have observed the excitation of the 29.83 keV nuclear level of the radioactive 40K nuclide, which level is not populated by any radioactive source, by synchrotron radiation for the first time. The absolute energy of the level of 29.834+/-0.011 keV and the half-life of 4.13+/-0.12 ns were obtained from our measurements. Our success in observing the nuclear excitation of radioactive 40K in a KCl powder sample shows the possibility for study of the local vibrational states and the electronic states of potassium in various areas of research.

Observation of nuclear excitation by electron transition in 197Au with synchrotron X rays and an avalanche photodiode

We have succeeded in observing nuclear excitation by electron transition (NEET) in 197Au by a new method. Monochromatic x-rays of synchrotron radiation were used to ionize the K shell of gold atoms in a target foil. The internal-conversion electrons emitted from excited nuclei were detected with a silicon avalanche photodiode. At a photon energy of 80.989 keV, the NEET probability in 197Au was determined to be (5.0+/-0.6)x10(-8) from a comparison of the event number per photon between NEET and the nuclear resonance at 77.351 keV.

Leu-4 (CD3) antigen expression in the neoplastic cells from T-ALL and T-lymphoblastic lymphoma.

The authors studied Leu-4 (CD3) antigen localization in the neoplastic cells from six cases with T-ALL, eight with T-lymphoblastic lymphoma (T-LL), and eight with peripheral T-cell lymphomas using immunoelectron microscopy (immuno-EM). Other various monoclonal antibody studies were also performed to detect the stages of differentiation of the neoplastic cells light microscopically. The authors' study indicated that cytoplasmic Leu-4 (cLeu-4) antigen expression appeared at the early stage of thymic T-cells, together with Leu-9 (CD7) and T101 (CD5). Their immuno-EM study also disclosed that the neoplastic cells at the early stage of thymocyte differentiation all had positive results for cLeu-4 but negative results for surface Leu-4 (sLeu-4). The Leu-4 antigen expression in the neoplastic cells at the stage of common thymocyte differentiation with OKT6- (CD1) positive phenotype was variable, showing cLeu-4+sLeu-4-, cLeu-4-sLeu-4+, and cLeu-4+sLeu-4+, depending on the cases investigated. From these results, they suggest that cLeu-4 antigen appears at the stage of early thymocyte differentiation, followed by predominant sLeu-4 expression at the stage of common thymocyte differentiation, and finally simultaneous expression of cLeu-4 and sLeu-4 at the stage of peripheral T-cells.

T-cell receptor expression in the T-cell malignancies.

Twenty-eight cases with T-cell neoplasms (10 with T-cell acute lymphoblastic leukemia [T-ALL], 10 with T-lymphoblastic lymphoma, and 8 with peripheral T-cell lymphomas) and 2 cases with reactive lymph nodes were immunohistochemically stained with monoclonal antibodies beta F1, delta TCS1, and WT31; beta F1 antibody recognizes the beta-subunit of T-cell receptor (TCR), whereas delta TCS1 and WT31 recognize the delta- and alpha beta-subunits of TCR, respectively. Five cases with T-ALL, four with T-lymphoblastic lymphoma (T-LL), and seven with peripheral T-cell lymphomas were positive for beta F1. None showed positive reactivity for delta TCS1. One case with T-LL and four cases with peripheral T-cell lymphomas were positive for WT31. Of the nine cases positive for beta F1 among T-ALLs and T-LLs, six were also positive for CD1 (OKT6), whereas six of seven positive cases for CD1 were positive for beta F1. The authors therefore suggest that TCR beta is expressed in the immature T-cells just earlier than or around the same stage of differentiation as those expressing CD1. The authors' immuno-electron microscopy study revealed that positive reactivity for beta F1 was localized predominantly in the cytoplasm of the neoplastic cells in the cases with T-ALL, T-LL and peripheral T-cell lymphomas, and in the cytoplasm of the reactive T-cells. However, it was not localized on the surface membrane. In contrast, positive reactivity for WT31 was localized on the surface membrane of the neoplastic and reactive T-cells. Only half of the cases of peripheral T-cell lymphomas showed positive reactivity for WT31. The authors consider that it may not be a very useful antibody for the detection of TCR alpha beta on the T-cell neoplasms using frozen tissue sections.

Isolation, characterization, and biosynthesis of Forssman antigen in human lung and lung carcinoma.

A glycolipid was isolated from normal lung and lung carcinoma tissues. This glycolipid was identified as the Forssman antigen of pentaglycosyl ceramide by means of chemical and immunological methods. The presence of this antigenic glycolipid was observed in all the tissues examined of adult and embryo lungs, and of lung tumors irrespective of histological type. The extracts of human lung and lung tumors were capable of catalyzing the synthesis of Forssman antigen from globoside.

Blood-group A and the related glycolipids of human lung.

Three glucosamine-containing sphingoglycolipids were isolated from human lung tissue of a blood group-A subject. They were hexaglycosyl, pentaglycosyl, and tetraglycosyl ceramides. The hexaglycosyl ceramide exhibited blood group-A antigenicity, and the following chemical structure was proposed on the basis of sequential glycosidase treatment and methylation analysis. (Formula: see text) The pentaglycosyl ceramide for human lung was a blood group H(O)-active glycolipid having a carbohydrate composition of Fuc : GlcNAc : Gal : Glc (1 : 1 : 2 : 1). The tetraglycosyl ceramide is probably paragloboside (lactoneotetraosyl ceramide).

Morphologic changes in the pancreas detected by screening ultrasonography in a mass survey, with special reference to main duct dilatation, cyst formation, and calcification.

Subclinical morphologic changes in the pancreas detected by screening ultrasonography of 130,951 subjects were analyzed in relation to their incidence and background factors. Main pancreatic duct (MPD) dilatation, cystic lesion, and calcification were found in 644 (0.49%), 271 (0.21%) and 65 (0.05%) patients, respectively. The incidence of MPD dilatation and calcification was significantly higher in men (p < 0.0001), whereas cystic lesion was significantly more frequent in women (p < 0.01). Age-dependent increase in the incidence of MPD dilatation and cystic lesion was observed in both sexes whereas that of calcification was observed only in men. Further detailed examinations for 312 randomly selected patients with these findings revealed that 97% of MPD dilatation, 95% of cystic lesion, and 86% of calcification were correctly identified by ultrasonography. Finally, 18 (5.8%) patients with chronic pancreatitis, 16 (5.1%) with neoplastic cysts, 3 with mucin-producing tumors, and 3 with carcinomas (0.96%, respectively) were detected. On the other hand, in 84.0% of MPD dilatation, 87.4% of cystic lesion, and 50.0% of calcification, we could not attribute their etiology to any known pancreatic disease. It is indicated that aging and gender are major clinically related factors of these changes.