312 research outputs found
sj-xls-1-hol-10.1177_09596836231151821 – Supplemental material for A humification-based method toward refining Holocene radiocarbon chronologies: Wetland records from southeastern China
No full textSupplemental material, sj-xls-1-hol-10.1177_09596836231151821 for A humification-based method toward refining Holocene radiocarbon chronologies: Wetland records from southeastern China by Nannan Li, Fengling Yu, Frank M Chambers, Zhaoquan Huang, Wenmin Lin, Zilong Zhu, Huanjie Yang and Jiaqi Lin in The Holocene</p
DS_DISC766278 – Supplemental material for Discovery of Small-Molecule Antagonists of the H3K9me3 Binding to UHRF1 Tandem Tudor Domain
No full textSupplemental material, DS_DISC766278 for Discovery of Small-Molecule Antagonists of the H3K9me3 Binding to UHRF1 Tandem Tudor Domain by Guillermo Senisterra, Hugh Y. Zhu, Xiao Luo, Hailong Zhang, Guoliang Xun, Chunliang Lu, Wen Xiao, Taraneh Hajian, Peter Loppnau, Irene Chau, Fengling Li, Abdellah Allali-Hassani, Peter Atadja, Counde Oyang, En Li, Peter J. Brown, Cheryl H. Arrowsmith, Kehao Zhao, Zhengtian Yu, and Masoud Vedadi in SLAS Discovery</p
A re-evaluation of Holocene relative sea-level change along the Fujian coast, southeastern China
No full textThe southeastern China coast is a region of special interest in the study of past and present relative sea-level change, given its distal location from giant ice sheets (far-field regions). During the past decades, a large number of biological, geological, and archaeological sea-level indicators have been retrieved from the Fujian coastal region which allows for recalibration and recalculation of sea-level index points (SLIPs). This study constructs a database of Holocene relative sea-level (RSL) observations for the Fujian coast, southeastern China. The database contains 59 quality-controlled SLIPs which show that RSL for the Fujian coast did not exceed present (0 m) during the Holocene, except potentially during 7.5–5.5 cal. kyr BP and 1.8–0.7 cal. kyr BP. Rates of RSL change were highest during the early Holocene and have decreased over time, due to the diminishing response of the Earth's mantle to glacial isostatic adjustment (GIA) and reduction of meltwater input. A series of sea-level oscillations were recorded in our SLIPs-based reconstructions which might correspond to global climate warming or cooling events. We assessed the spatial variability of RSL histories and compared these with the ICE-6G_C and ANU-ICE GIA model predictions. Substantial misfits between GIA predictions and regional RSL reconstructions were recognized: (1) the deceleration of the early-Holocene sea-level rise ended about one millennia earlier in the ICE-6G_C model than in the SLIPs-based reconstructions; (2) GIA model predictions show a mid-Holocene sea-level highstand of 1–3 m which is absent from our SLIPs-based reconstructions; and (3) all GIA model predicted a gradual RSL fall to 0 m since the middle Holocene, while our reconstruction displays significant RSL oscillations. It is presently unknown whether these misfits are caused by uncertainties in regional tectonic movement estimation or parameters used in the GIA models. Future applications of spatiotemporal statistical techniques are required to better quantify the gradient of the isostatic contribution and to provide improved context for the assessment of the ongoing acceleration of sea-level rise.Ministry of Education (MOE)National Research Foundation (NRF)Submitted/Accepted versionThis work was financially supported by the National Natural Science Foundation of China (Grant No. 42076207 to Fengling Yu); the Funda- mental Research Funds for the Central Universities of Xiamen University (Grant No. 20720190096 to Fengling Yu); the China Postdoctoral Sci- ence Foundation (Grant No. 2021M691862 to Nannan Li); the Singapore Ministry of Education Academic Research Fund MOE2019-T3-1-004 and MOE-T2EP50120-0007, the National Research Foundation Singapore, and the Singapore Ministry of Education, under the Research Centers of Excellence initiative (to Tanghua Li)
Reconstruction of the East Asian monsoon variability since the mid-Holocene from the Pearl River estuary, southern China
No full textThe principal aim of this thesis is to reconstruct East Asian Monsoon (EAM) variability during the mid-Holocene, developing a relatively new proxy of bulk organic carbon isotopic signature (δ13C). C/N ratios and trace elements are also employed to conduct a multi-proxy case study from the Pearl River estuary, southern China. Sources of sediments within an estuary include river-derived terrestrial/freshwater input, in situ brackish-water suspended sediment and tide-derived marine input. This study assumes the three proxies can help differentiate sources of sediments relating to monsoon-driven freshwater flux and help reconstruct monsoonal precipitation history during the mid-Holocene when the sea level was relatively stable.
To achieve the aims of this thesis a range of modern samples were collected from terrestrial areas, including plants and soil samples, through to estuarine areas, including seasonal estuarine suspended organic matter (SOM) and surface sediment. Results suggest that bulk organic δ13C and C/N ratios can successfully identify sources of the organic component of the estuarine sediment, and thus can be used to infer relative changes in monsoon-driven freshwater flux to the estuary. For example, more negative δ13C values reflect a greater level of contribution of freshwater organic carbon, i.e. stronger monsoonal freshwater discharge. Results also show that a combination of selected metals, such as the terrigenous metals (Fe, Mn, Co and As), can be useful for indicating sediment sources and sedimentary environment.
Analysis of an estuarine core (UV1) shows that freshwater discharge from the Pearl River catchment gradually declined from 6400 to 2000 cal. years BP, suggesting a gradual weakening of summer monsoon precipitation, responding to the weakening insolation controlled by the orbital-driven precession cycle. Superimposed on this are wet/dry intervals, ranging from centennial- to millennial- scale, driven by solar activity. Changes in ENSO and high-latitude cooling events might be responsible for dry/wet events at centennial- to decadal- scale, identified during the mid-Holocene. This study also suggests that the coupling of thermal and moist conditions of the EAM might only have become stable after 4500 cal. yr BP. A sudden shift in the geochemical signature indicates agricultural activity in the Pearl River delta intensified from 2000 cal. yr BP
Miridiba (Pledina) sinensis
No full textMiridiba (Pledina) sinensis (Hope, 1845) Holotrichia sinensis Hope, 1842: 60, 1843: 63, 1845: 8. Ancylonycha sinae Blanchard, 1851: 139, Burmeister 1855: 136 (junior synonym of M. (P.) sinensis). Holotrichia (Pledina) sinensis: Reitter 1902: 174, Smetana & Král 2006: 219. Miridiba (Pledina) sinensis: Nomura 1977: 88, Miyake 1991: 9, Li et al. 2015: 533, Bezděk 2016: 272. Rhizotrogus cribellatus Fairmaire, 1891: 200, Keith 2006: 43 (junior synonym of M. (P.) sinensis). Type locality. “Canton” (= China: Guangzhou). Type material examined. Lectotype, male, labelled: “ China / Canton [handwritten] // 60·15 / E.I.C [typeset] / Sinensis. Hope. [handwritten] // Lectotype / Miridiba sinensis (Hope, 1845) / CH. Bu Gao & M. Coca-Abia, 2017 [typeset, red label]”, deposited in BMNH. Additional material examined. Two males, labelled: “ Hainan / 1952, Summer [handwritten, Chinese] // Holotrichia. sinensis Hope / Identified by Zhiliang Zhang [handwritten, Chinese]”, deposited in SYAU; male: “ Hainan Islands, Jian Fengling / 1992-4-5 / Guangchun Liu, Min Wang / Northwest Agriculture University [typeset, Chinese]”, deposited in NWAFU; male: “ Yunnan, Mengyang 790 m / 1991-?-8 / Liu Guangchun, Cai Wanzhi / NWAFU [typeset, Chinese] // Miridiba sinensis / (Hope, 1845) / (GCHB) det. 2018”, deposited in NWAFU. Distribution. China (Fujian, Hainan, Guangdong, Guangxi, Guizhou, Hainan, Hubei, Jiangsu, Jiangxi, Shandong, Taiwan, Yunnan, Zhejiang) (Chang 1964; Wei 1989; Zhang & Li 1997). Remarks. Newly recorded for Hainan and Yunnan provinces.Published as part of Gao, Chuan-Bu, Bai, Ming, Fang, Hong & Yu, Zhi-Guo, 2018, Four new species of the genus Miridiba Reitter (Coleoptera: Scarabaeidae: Melolonthinae) from China, pp. 1-20 in Zootaxa 4527 (1) on page 16, DOI: 10.11646/zootaxa.4527.1.1, http://zenodo.org/record/261188
Development of functionalized mesoporous inorganic-organic sorbents for removal of phenols and mercury ions from water, 2007
No full textPeriodic mesoporous organosilicates (PMOs), containing bridging organic groups, such as phenylene- or ethylene-, and pendant groups such as imidazole- or thiol-, were synthesized by the hydrolysis and co-condensation of alkoxysilyl precursors, bis(triethoxysilyl)ethane (BTSE) or bis(triethoxysilyl)benzene (BTSB) under basic conditions. Cetyltrimethylammonium chloride was used to increase the porosity and surface areas of these materials via the surfactant template approach. Further functionalization was achieved by co-condensation with trialkoxyorganosilanes, including 3-mercaptopropyltrimethoxysilane or -(3-triethoxysilylpropyl)-4,5- dihydroimidazole. Structural characterization of these materials was carried out by nitrogen gas sorption, X-ray diffraction, TEM, TGA, NMR, EDS and elemental analysis. The adsorption of phenolic compounds (phenol, 4-nitrophenol, 4-chlorophenol, 4- methylphenol, 2,4-dinitrophenol, 2,4-dichlorophenol, 2,4-dimethylphenol) and mercury (II) were investigated by batch testing. The material containing imidazole group exhibited a high affinity for 2,4-dinitrophenol. The capacities of the materials are: BTSE-IM (83.7 mg/g), BTSB-IM (53.8 mg/g) and MCM-IM (118.5 mg/g). The sorption of 24-DNP on BTSE-IM and BTSB-IM closely follow the Langmuir adsorption model. This means the sorption occurred on homogeneous surface as on a monolayer. The sorption of 24-DNP on MCM-IM, and 24-DCP, 24-DMP, 24-DNP on BTSE are more suitable to the Freundlich adsorption model. That means these sorptions are non-ideal and multi-layered on heterogeneous surface. The adsorption test for mercury (II) indicated that the materials containing -SH functional group showed better affinity for bonding mercury (II) than the materials containing the -IM group. These materials would be highly effective for removal of mercury (II)
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