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| 1 | New eolian red clay sequence on the western Chinese Loess Plateau linked to onset of Asian desertification about 25 Ma ago显示文摘The expansion of inland Asia deserts has considerably influenced the environmental, social and economic activities in Asia. Aridification of inland Asia, especially timing of the initiation of Asian desertification, is a contentious topic in paleoclimatology. Late Cenozoic eolian loess-red clay sequences on the Chinese Loess Plateau, which possess abundant paleoclimatic and paleo-environmental information, can be regarded as an indicator of inland Asia desertification. Here we present a detailed magnetostratigraphic investigation of a new red clay sequence about 654 m in Zhuanglang located at the western Chinese Loess Plateau. Sedimentological, geochemical, mineralogical, and quartz morphological lines of evidence show that the red clay is of eolian origin. Magnetostratigraphic correlations indicate that this core sequence spans from 25.6 to 4.8 Ma, and typical eolian red clay appears as early as 25 Ma. This extends the lower limit of the red clay on the Chinese Loess Plateau from the previously thought early Miocene back into the late Oligocene. This new red clay record further implies that the inland Asia desertification was initiated at least by the late Oligocene. This sequence provides a unique high-resolution geological record for understanding the inland Asia desertification process since the late Oligocene. | QIANG XiaoKe AN ZhiSheng SONG YouGui CHANG Hong SUN YouBin LIU WeiGuo AO Hong DONG JiBao FU ChaoFeng WU Feng LU FengYan CAI YanJun ZHOU WeiJian CAO JunJi XU XinWen AI Li | 2011 | Science China Earth Sciences2011，54，1： | 73 |
| 2 | Grain size distribution of quartz isolated from Chinese loess/ paleosol显示文摘Grain size distribution of bulk loess-paleosol and quartz chemically extracted from the loess/paleosol shows that mean size of the bulk samples is always finer than that of the quartz. The original aeolian depositions have been modified to various degrees by post-depositional weathering and pedogenic processes. The grain size distribution of the isolated quartz should be close to that of the primary aeolian sediment because the chemical pretreatment excludes secondary produced minerals. Therefore, the grain size of the quartz may be considered to more clearly reflect the variations of winter monsoon intensity. | SUN Youbin LU Huayu AN Zhisheng | 2000 | Chinese Science Bulletin2000，45，24： | 9 |
| 3 | Application of Avaatech X-ray fluorescence core-scanning in Sr/Ca analysis of speleothems显示文摘Application of X-ray fluorescence core-scanning(XRF-CS) on both marine and lake sediments has achieved remarkable results. However, its application has not been widely extended to the research on speleothems. In this study, we measure the Sr abundance and the Sr/Ca ratios of three stalagmites(two aragonite stalagmites, one calcite stalagmite) using the state-of-the-art fourth-generation Avaatech high-resolution XRF core scanner. Through comparisons among different scan paths and among different scan resolutions, as well as comparisons with inductively coupled plasma optical emission spectrometer(ICP-OES), Itrax XRF, and Artax XRF results, we confirm that the Avaatech XRF core scanner could precisely, quickly, and nondestructively analyze the high-resolution Sr abundance of speleothems. Furthermore, we combine the stalagmite δ^(18)O records to explore the paleoclimatic significance of the measured stalagmite Sr/Ca. | Dong LI Liangcheng TAN Fei GUO Yanjun CAI Youbin SUN Gang XUE Xing CHENG Hong YAN Hai CHENG R.Lawrence EDWARDS Yongli GAO Jessica KELLEY | 2019 | Science China Earth Sciences2019，62，6： | 7 |
| 4 | Multi-scale validation strategy for satellite albedo products and its uncertainty analysis显示文摘Coarse-resolution satellite albedo products are important for climate change and energy balance research because of their capability to characterize the spatiotemporal patterns of land surface parameters at both the regional and global scales. The accuracy of coarse-resolution products is usually assessed via comparison with in situ measurements. The key issue in the comparison of remote sensing observations with in situ measurements is scaling and uncertainty. This paper presents a strategy for validating 1-km-resolution remote sensing albedo products using field measurements and high-resolution remote sensing observations. Field measurements were collected to calibrate the high-resolution(30 m) albedo products derived from HJ-1a/b images. Then, the calibrated high-resolution albedo maps were resampled(i.e., upscaled) to assess the accuracy of the coarse-resolution albedo products. The samples of field measurements and high-resolution pixels are based on an uncertainty analysis. Two types of coarse-resolution albedo datasets, from global land surface satellite(GLASS) and moderate-resolution imaging spectroradiometer(MODIS), are validated over the middle reaches of the Heihe River in China. The results indicate that the upscaled HJ(Huan Jing means environment in Chinese and this refers to a satellite constellation designed for environment and disaster monitoring by China) albedo, which was calibrated using field measurements, can provide accurate reference values for validating coarse-resolution satellite albedo products. However, the uncertainties in the upscaled HJ albedo should be estimated, and pixels with large uncertainties should be excluded from the validation process. | PENG JingJing LIU Qiang WEN JianGuang LIU QinHuo TANG Yong WANG LiZhao DOU BaoCheng YOU DongQin SUN ChangKui ZHAO XiaoJie FENG YouBin SHI Jian | 2015 | Science China Earth Sciences2015，58，4： | 5 |
| 5 | STUDY ON ULTRASONIC VIBRATION DRILLING IN CARBON FIBER REINFORCED POLYMERS显示文摘STUDYONULTRASONICVIBRATIONDRILLINGINCARBONFIBERREINFORCEDPOLYMERSZhangQixin;SunShiyu(HarbinInstituteofTechnologyFactory529,Be... | Zhang Qixin Sun Shiyu (Harbin Institute of Technology Factory 529, Beijing)Luo Jianwei Feng Youbin Ma Chengxian Tu Xifu (Harbin Institute of Technology) | 1994 | Chinese Journal of Mechanical Engineering1994，7，1： | 2 |
| 6 | An as sessment of magnetic and geochemical indicators of weathe ring and pedogenesis at two contrasting sites on the Chinese Loess plateau显示文摘 | Jan Bloemendal LIU Xiumin SUN Youbin | 2008 | Palaeogeography Palaeoclimatology Palaeoecology2008，257，： | 1 |
| 7 | Processescontrolling the geochemical composition of the South ChinaSea sediments during the last climatic cycle 显示文摘 | SUN YOUBIN WU FENQ STEVEN C | 2008 | ChemicalGeology2008，257，： | 1 |
| 8 | An as- sessment of magnetic and geochemical indicators of weathering and pedogenesis at two contrasting sites on the Chinese Loess Plateau 显示文摘 | Bloemendal J Liu Xiuming Sun youbin | 2008 | Palaeogeography Palaeoclimatology Palaeoecology2008，257，12： | 1 |
| 9 | Changing color of Chinese loess: Geochemical constraint and paleoclimatic significance显示文摘 | Youbin Sun Liu He Lianji Liang Zhisheng An | 2010 | Journal of Asian Earth Sciences2010，，6： | 1 |
| 10 | Grain size of loess, palaeosol and Red Clay deposits on the Chinese Loess Plateau: Significance for understanding pedogenic alteration and palaeomonsoon evolution 显示文摘 | Sun Youbin Lu Huayu An Zhisheng | 2006 | Palaeoclimatology2006，24，1： | 1 |
| 11 | Paleoeneir- onemnt change in the middle Okinawa Trough since the last deglaciation: Evidence from the sedimentation rate and plank- tonic foraminiferal record 显示文摘 | Xiang Rong Sun Youbin Li Tiegang | 2007 | Palaeogeography Palaeochi- natology Palaeoecology2007，243，34： | 1 |
| 12 | Nd and Sr isotopic characteristics of Chinese deserts: Implications for the provenances of Asian dust显示文摘 | Jun Chen Gaojun Li Jiedong Yang Wenbo Rao Huayu Lu William Balsam Youbin Sun Junfeng Ji | 2007 | Geochimica et Cosmochimica Acta2007，，15： | 1 |
| 13 | Distinguishing the sources of Asian dust based on electron spin resonance signal intensity and crystallinity of quartz显示文摘 | Sun Youbin Tada R Chen Jun | 2007 | Atmospheric Environment2007，41，： | 1 |
| 14 | Tracing the provenance of fine-grained dust deposited on the central Chinese Loess Plateau显示文摘 | Sun Youbin Tada R Chen Jun | 2008 | Geophysical Research Letters2008，，： | 1 |
| 15 | Amplitude and timing of sea-surfacetemperature change in the northern South China Sea: Dynamiclink to the East Asian monsoon显示文摘 | Oppo D W SUN Youbin | 2005 | Geology2005，33，10： | 1 |
| 16 | Processes controlling the geochemical composition of the South China Sea sediments during the last climatic cycle显示文摘 | Sun Youbin Wu Feng Clemens S C | 2008 | Chemical Geology2008，257，34： | 1 |
| 17 | Immobilization and characterization of the Lactarius deliciosus mycelia-embedded polylysine-alginate beads and their decolorization performance显示文摘Liquid fermented fungal mycelia with decolorization capability have potential applications in scale-up. In this work, the Lactarius deliciosus mycelia were immobilized on ε-polylysine-alginate beads, and the decolorization effects of ε-polylysine-alginate beads were demonstrated along with Coomassie brilliant blue G-250 as a model dye. Morphology observation confirmed the beads had an exterior film and interior capsule with honeycomb microstructures suitable for mycelia growth. It was manifested that the maximum decolorization efficiency for mycelia was 98.5% at a removal rate of 0.68 mg·L^(-1)·h after 3 days. In comparison, the decolorization efficiency of the immobilized mycelia reached the maximum value of 97.3% at a removal rate of 6.1 mg·L^(-1)·h after 8 h. The enzyme activities of lignin peroxidase and laccase tested in the immobilized mycelia were significantly higher than in that of the free ones, such as the lignin peroxidase had the highest enzyme activity of 77.6 ± 7.4 U·L^(-1) in the former, while of 27.4 ± 8.7 U·L^(-1) in the latter. The immobilization of L. deliciosus mycelia could improve the decolorization of Coomassie brilliant blue G-250 efficiently. The prepared ε-polylysine-alginate beads embedded with L. deliciosus mycelia have very good reusability and a great potential in decolorizing analog dyes. | Yiwen Jin Jie Yuan Caixia Liu Jiacheng Sun Youbin Liu Zhifeng Ding Qingxi Wu | 2023 | Frontiers of Chemical Science and Engineering2023，17，12： | 0 |
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