Maturity and Strength Development of Mortar with Antifreezing Admixture at Temperatures Lower than 0℃

This study investigated the e_ect of temperature and time at temperatures lower than 0℃ on mortar mixed with antifreezing admixture to determine the temperature–time function with the aim of expressing the e_ect universally. As a result, the maturity equation for temperatures lower than 0℃ proposed in previous studies was verified to be applicable to type-B blast furnace slag cement. The applicability of this equation at temperatures lower than 0℃ had not been investigated hitherto. The strength development attributable to the e_ect of the antifreezing admixture can be expressed as the reference temperature, and the reduction in the chemical potential of water chemical potential reduction was found to depend on the reaction rate. A new maturity equation for temperatures lower than 0℃ was proposed considering the e_ect of the antifreezing admixture

Marine Algae from Hirota Bay on the Pacific Coast of Northeastern Honshu, Japan(Applied Aquatic Bio-Sciences Marine Plant Ecology)

Monthly collection of marine algae from the intertidal to subtidal zones in Hirota Bay (38°56\u27 N, 141°42\u27 E) on the Pacific coast of northeastern Honshu, Japan, was carried out from August 2005 to July 2006. A total of 95 species were listed, 12 of which belong to Chlorophyta, 24 to Phaeophyta, 58 to Rhodophyta, and one to sea grass. In these algae, the 10 species, Urospora penicilliformis, Pachydictyon coriaceum, Chordaria flagelliformis, Myagropsis myagroides, Bangia gloiopeltidicola, Lithophyllum okamurae, Titanoderma tumidulum, Chondracanthus tenellus, Polysiphonia abscissa and P. sphaerocarpa, were newly recorded to the marine algae from the coasts adjacent to Hirota Bay. The floral index of I/H value in Hirota Bay was 1.1, suggesting that the marine algal flora in Hirota Bay belongs to the typical subarctic zone

Novel Charge Ordering in the Trimer Iridium Oxide BaIrO3

We have prepared polycrystalline samples of the trimer Ir oxide BaIrO3 with face-shared Ir3O12 trimers, and have investigated the origin of the phase transition at 182 K by measuring resistivity, thermopower, magnetization and synchrotron x-ray diffraction. We propose a possible electronic model and transition mechanism, starting from a localized electron picture on the basis of the Rietveld refinement. Within this model, BaIrO3 can be basically regarded as a Mott insulator, when the Ir3O12 trimer is identified to one pseudo-atom or one lattice site. The transition can be viewed as a transition from the Mott insulator phase to a kind of charge ordered insulator phase.Comment: 8 pages 5 figures, Crystals (in press

Retrograde Jejuno-Jejunal Intussusception after Total Gastrectomy

An eighty-year-old female was transferred to the hospital after experiencing abdominal pain and nausea. She had had a history of total gastrectomy for gastric cancer 14 years previously. Abdominal X-ray revealed a localized expansion of the small bowel. Computed tomography revealed a mass with a lamellar structure in a concentric circle. With a tentative diagnosis of small bowel obstruction due to intussusception, she underwent emergency operation. Laparotomy revealed a retrograde jejuno-jejunal intussusception. Bowel resection was performed due to the severe ischemic damage. All reported intussusception cases after total gastrectomy displayed retrograde characteristics and could occur both during the early and late period after surgery. It is important to consider the possibility of intussusception for patients presenting with acute abdomen who have previously undergone gastric resection

Genetic diversity and structure in the Sado captive population of the Japanese crested ibis.

The Japanese crested ibis Nipponia nippon is a critically threatened bird. We assessed genetic diversity and structure in the Sado captive population of the Japanese crested ibis based on 24 and 50 microsatellite markers developed respectively for the same and related species. Of a total of 74 loci, 19 showed polymorphisms in the five founder birds of the population, and therefore were useful for the analysis of genetic diversity and structure. Genetic diversity measures, A, ne, He, Hoand PIC, obtained by genotyping of the 138 descendants were similar to those of other species with population bottlenecks, and thus considerably low. The low level of genetic diversity resulting from such bottlenecks was consistent with the results of lower genetic diversity measures for the Sado captive relative to the Chinese population that is the source population for the Sado group as determined using previously reported data and heterozygosity excess by Hardy-Weinberg equilibrium tests. Further, individual clustering based on the allele-sharing distance and Bayesian model-based clustering revealed that the founder genomes were equally at population in total, and with various admixture patterns at individual levels inherited by the descendants. The clustering results, together with the result of inheritance of all alleles of the microsatellites from the founders to descendants, suggest that planned mating in captive-breeding programs for the population has succeeded in maintaining genetic diversity and minimizing kinship. In addition, the Bayesian model-based clustering assumed two different components of genomes in the Sado captive Japanese crested ibis, supporting a considerably low level of genetic diversity