Open Library Archives of Kagawa University (OLIVE)
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Preoperative diagnosis of Primary Fallopian tube carcinoma
No full textPrimary Fallopian tube carcinoma is a rare malignancy of the female reproductive tumors, and it is difficult to diagnose in earlier stages. We present herein a case of primary Fallopian tube carcinoma diagnosed preoperatively. A 72‐year‐old Japanese woman presented with persistent post‐menopausal bloody w atery vaginal discharge. Transvaginal sonography revealed a complex sausage‐shaped mass in the right adnexal region. Color and pulsed Doppler ultrosound showed small amounts of venous flows in the solid parts of the mass. The uterus was in normal size but with continuous hydrometra. Diagnosis of Fallopian tube carcinoma was made before surgery. The histopathologic result was serous adenocarcinoma. The patient was treatin g with combination chemotherapy and doing well. The preoperative diagnosis of Fallopian tube carcinoma brought it to early treatment.journal articl
Transforming monosaccharides: Recent advances in rare sugar production and future exploration
No full textRare sugars are defined as monosaccharides and their derivatives that do not exist in nature at all or that exist in extremely limited amounts despite being theoretically possible. At present, no comprehensive dogma has been presented regarding how and why these rare sugars have deviated from the naturally selected monosaccharides. In this minireview, we adopt a hypothesis on the origin and evolution of elementary hexoses, previously presented by one of the authors (Hirabayashi, Q Rev Biol, 1996, 71:365–380). In this scenario, monosaccharides, which constitute various kinds of glycans in nature, are assumed to have been generated by formose reactions on the prebiotic Earth (chemical evolution era). Among them, the most stable hexoses, i.e., fructose, glucose, and mannose remained accumulated. After the birth of life, the “chemical origin” saccharides thus survived were transformed into a variety of “bricolage products”, which include galactose and other recognition saccharides like fucose and sialic acid through the invention of diverse metabolic pathways (biological evolution era). The remaining monosaccharides that have deviated from this scenario are considered rare sugars. If we can produce rare sugars as we wish, it is expected that various more useful biomaterials will be created by using them as raw materials. Thanks to the pioneering research of the Izumori group in the 1990′s, and to a few other investigations by other groups, almost all monosaccharides including l-sugars can now be produced by combining both chemical and enzymatic approaches. After briefly giving an overview of the origin of elementary hexoses and the current state of the rare sugar production, we will look ahead to the next generation of monosaccharide research which also targets glycosides including disaccharides.journal articl
Recycling of wet carbon fiber-reinforced plastic laminates by thermal decomposition coupled with electrical treatment
No full textThe use of carbon fiber-reinforced plastics (CFRPs) produces moisture-absorbing CFRP waste, which is usually recycled via thermal decomposition treatment (TDT). However, the oxygen gas generated during heating can hardly penetrate dense CFRPs, resulting in nonuniform damage to the recovered carbon fibers (rCFs) collected from the outer (oCFs) and inner (iCFs) parts of CFRP waste. Herein, TDT was coupled with electrical treatment (ET) to improve the recycling performance of CFRP laminates waste. The tensile strength of the rCFs measured via the single-fiber tensile tests was analyzed using a two-parameter Weibull distribution. Absorbed water was preferentially evaporated from the laminates by Joule heating during ET, resulting in extensive pore formation. Following TDT, the oCFs and iCFs showed nearly identical average tensile strengths because the pores formed by ET served as efficient diffusion pathways for oxygen gas. The proposed recycling technology may potentially be applied to other types of moisture-absorption waste.journal articl