6,277 research outputs found
Clinicopathological characteristics of alpha-fetoprotien-producing gastric cancer
No full textα-fetoprotein (AFP)-producing gastric cancer is a rare tumor with high rates of liver metastasis and a poor prognosis. Many studies have been performed but there have been no comprehensive investigations of the clinicopathological and prognosis
Acer sycopseoides Chun
No full textAcer sycopseoides Chun (1932:t. 3160). Type.— China. Guangxi [Kwangsi]: Luocheng Xian [Lu-chen-hsien], [Tia-Lian-Shan], elev. ca. 540 m, 25 May 1928, R. C. Ching 5336 (IBSC0436401, lectotype designated by Fang 1939; isolectotypes A00050491, CQNM0000975, K000640908, NAS00071821, NAS00071822, NAS00071823, NAS00071824, NY00337719, PE00023451, PE00023452). Note:—In the protologue, Chun (1932) cited a single gathering but did not specify the herbarium where the specimens are deposited. Ten duplicates are traced in herbaria A, CQNM, IBSC, K, NAS, NY and PE as listed above, and all are syntypes according to Art. 9.6 (Turland et al. 2018). When Fang (1939) wrote “type in Suny.”, he achieved to designate the lectotype for the name. The specimen IBSC043641 was previously deposited at Suny. (Abbreviation of Sun Yatsen University) and later transferred to IBSC, which bears both the title of Sun Yatsen University (in Chinese) at lower right and handwritten annotation by W. Y. Chun. In the handwritten annotation, Chun annotated in 1930 as “ Acer sycopseoides Chun, sp. nov. (Changed from A. pachyphyllu Chun, mss). Fragments deposited at Kew”, which means the specimen IBSC043641 was not the only specimen that Chun (1932) based to describe the species, and it is reasonable to be the lectotype designated by Fang (1939). It is clearly noted in the protologue (Chun 1932) that the author of this name was Chun (W. Y. Chun), and this is also supported by annotation on the lectotype, but the authorship was wrongly ascribed to F.Chun (Faith Chun or Shuzhen Chen; e.g. Xu et al. 2008).Published as part of Chen, Feng & He, Hai, 2022, The historical relics in Chongqing Natural History Museum: An annotated checklist of original materials for 37 names of Chinese seed plants, pp. 38-52 in Phytotaxa 530 (1) on page 46, DOI: 10.11646/phytotaxa.530.1.3, http://zenodo.org/record/582393
Degradation and interaction between organic concentrations and toxicity of 2,4,6-trichlorophenol in anaerobic system
No full textWhen 2,4,6-TCP (trichlorophenol) as a toxicant was added to the reactors with 500, 1000, 2000 and 4000 mg COD/l, methane production ratios between the reactors with and without toxicant were 64, 75, 83 and 96%. The 2,4,6-TCP was more toxic to methane production at COD concentrations lower than 1000 mg/l. In continuous operation, when the toxicant was fed to the reactor, methane production rate (CH4-l/g-COD) recovered in four days
Effects of xanthan gum treatment on sedimentation and consolidation of kaolinite aggregates
No full textUnderstanding the sedimentation and simultaneous consolidation behavior of xanthan gum (XG)-biopolymer-treated soils remains a significant research gap in developing environmentally friendly ground-improvement techniques for geotechnical applications. This study addresses this gap by conducting laboratory experiments on kaolinite suspensions with varying XG-to-kaolinite mass ratios (mb/ms). The results showed that the XG treatment modified the sedimentation patterns by promoting larger floc formation and accelerated settling. Additionally, the XG treatment enhanced the shear stiffness and shear strength, particularly at shallow depths. At mb/ms ratios less than 1%, the volume compression was reduced by the XG; the coefficient of compressibility decreased by 49% at 1% mb/ms, and the consolidation was accelerated, as indicated by a 387% increase in the hydraulic conductivity at 0.5% mb/ms under the vertical effective stress of 40 kPa. Contrastingly, at mb/ms ratios greater than 1%, viscous XG hydrogels clogged pores, resulting in a 45% reduction in the coefficient of consolidation at 2% mb/ms under a vertical effective stress of 15 kPa and a 35% decrease in the hydraulic conductivity at 2% mb/ms under a vertical effective stress of 40 kPa. These findings underscore the potential of XG treatment in improving the sedimentation and consolidation processes, highlighting its applicability in geotechnical projects, such as dredging, landfilling, and artificial island construction
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