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Wildfire associated with a deciduous broadleaved forest from the Neogene Baoshan Basin at the southeastern margin of the Tibetan Plateau

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Journal of Palaeogeography 2023年第3期12卷 448-462页

作者： Yong-jiang Huang Arata Momohara Shu-Feng li Xue-ping ji jian Qiu lin-Bo jia jin-jin Hu Yun-Heng ji Zhe-Kun Zhou Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of SciencesKunming 650201Yunnan ProvinceChina Graduate School of Horticulture Chiba UniversityChiba 271-8510Japan Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMengla 666303Yunnan ProvinceChina Kunming Natural History Museum of Zoology Kunming Institute of ZoologyChinese Academy of SciencesKunming 650223Yunnan ProvinceChina School of Material and Chemical Engineering Southwest Forestry UniversityKunming 650224Yunnan ProvinceChina

Wildfire bears a close relationship with vegetation as its fuel *** southeastern margin of the Tibetan Plateau witnesses frequent wildfires among various types of vegetation,whereas such wide in-teractions between wildfire and vegetation remain poorly studied from geological *** this study,we reported a local fire using sedimentary macroscopic charcoals from the latest Miocene to early Pliocene of the Baoshan Basin in this region,and then inferred the local vegetation at the time of the fire event based chiefly on the coexistent fruit and seed fossil *** taxonomic results show that the charcoal assemblage is probably dominated by broadleaved plants and the fruit and seed fossil assemblage is apparently dominated by Salix(Salicaceae)followed by Sambucus(Adoxaceae),suggesting a deciduous broadleaved forest in which the fire likely *** a seasonally dry climate associated with the Asian monsoon,this type of vegetation might be prone to natural fire,because in the wet rainy season the plants grew well to accumulate biofuel and in the dry season abundant ground litter resulting from leaf decay would be desiccated to become highly *** to the fire-tolerant habit of Salix as the dominant plant,the forest might be in return adapted to the fire event or even more fires that potentially *** these may suggest a close relationship between the fire event and the reconstructed *** finding documents a new type of wildfire—vegetation interaction,namely the interaction between wildfire and deciduous broadleaved forest,from the geological past at the southeastern margin of the Tibetan *** therefore sheds new light on the wildfire history coupling vegetation change in the region.

关键词： Charcoal Fossil carpology Salix Sambucus Precipitation seasonality

Elevated VEGF-A & PLGF concentration in aqueous humor of patients with uveal melanoma following Iodine-125 plaque radiotherapy

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International Journal of Ophthalmology(English edition) 2020年第4期13卷 599-605页

作者： Meng-Xi Chen Yue-Ming liu Yang li Xuan Yang Wen-bin Wei Beijing Tongren Eye Center Beijing Tongren HospitalBeijing Key Laboratory of Intraocular tumor Diagnosis and TreatmentBeijing 100730China

AIM: To measure the concentration of vascular endothelial growth factor-A(VEGF-A), and placental growth factor(PLGF) in aqueous humor of uveal melanoma patients before and after Iodine-125 plaque therapy(IPT), determine the postoperative fluctuation and evaluate associated factors in ***: Participants were 18 Chinese patients with uveal melanoma who were elected to IPT. Undiluted aqueous humor samples were collected at Iodine plaque implant and removal time, then stored immediately at-80℃ until assayed. The concentration of VEGF-A, PLGF and other 7 cytokines comprising interleukin-2(IL-2), IL-8, IL-10, interferon(IFN)-γ, programmed death(PD)-1, transforming growth factor(TGF)-β1 and insulin-like growth factor(IGF)-1 in aqueous humor was measured using Raybiotech immunoassay kit, a high throughput strategy. The VEGF-A and PLGF levels were compared across preoperation and postoperation subgroups, as well as those of other 7 interleukins. Correlation and grouped analyses were conducted to determine the independent effects of clinical parameters and other cytokines on VEGF-A and PLGF concentration or fluctuation. This study set a self-control ***: VEGF-A(P=0.038) and PLGF(P=0.026) were the only two increased cytokines after IPT. Preoperative and postoperative level of VEGF-A and PLGF(r=0.575, P=0.013;r=0.987, P<0.001) correlated with each other significantly. Level of VEGF-A(r=0.626, P=0.005;r=0.588, P=0.01) and PLGF(r=0.616, P=0.007;r=0.588, P=0.01) had positive correlation with tumor thickness consistently. Elevated VEGF-A or PLGF level were strong predictive factors of each other(P=0.007, OR=60.0). The elevated VEGF-A group showed a higher postoperative level of IFN-γ(P=0.005), IL-2(P<0.001) and IL-10(P=0.004) in aqueous humor. When the elevated PLGF group got similar results that a higher postoperative level of IFN-γ(P=0.007), IL-2(P<0.001) and IL-10(P=0.013) in aqueous humor. CONCLUSION: This study reveals that VEGF-A and PLGF in aqueous humor s

关键词： uveal melanoma vascular endothelial growth factor-A radioplaque therapy placental growth factor

Retrieving chlorophyll content and equivalent water thickness of Moso bamboo(Phyllostachys pubescens) forests under Pantana phyllostachysae Chao-induced stress from Sentinel-2A/B images in a multiple LUTs-based PROSAIL framework

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Forest Ecosystems 2023年第2期10卷 252-267页

作者： Zhanghua Xu Anqi He Yiwei Zhang Zhenbang Hao Yifan li Songyang Xiang bin li lingyan Chen Hui Yu Wanling Shen Xuying Huang Xiaoyu Guo Zenglu li College of Environment and Safety Engineering Academy of Geography and Ecological EnvironmentFuzhou UniversityFuzhou350108China Fujian Provincial Key Laboratory of Resources and Environment Monitoring&Sustainable Management and Utilization Sanming365004China Key Laboratory of Spatial Data Mining&Information Sharing Ministry of EducationThe Academy of Digital ChinaFuzhou UniversityFuzhou350108China College of Forestry Fujian Agriculture and Forestry UniversityFuzhou350002China International Institute for Earth System Science Nanjing UniversityNanjing210023China

Biochemical components of Moso bamboo(Phyllostachys pubescens)are critical to physiological and ecological processes and play an important role in the material and energy cycles of the *** coupled PROSPECT with SAIL(PROSAIL)radiative transfer model is widely used for vegetation biochemical component content ***,the presence of leaf-eating pests,such as Pantana phyllostachysae Chao(PPC),weakens the performance of the model for estimating biochemical components of Moso bamboo and thus must be ***,this study considered pest-induced stress signals associated with Sentinel-2A/B images and field data and established multiple sets of biochemical canopy reflectance look-up tables(LUTs)based on the PROSAIL framework by setting different parameter ranges according to infestation *** inversions of leaf area index(LAI),leaf chlorophyll content(LCC),and leaf equivalent water thickness(LEWT)were *** scale conversions from LCC to canopy chlorophyll content(CCC)and LEWT to canopy equivalent water thickness(CEWT)were *** results showed that LAI,CCC,and CEWT were inversely related with PPC-induced *** applying multiple LUTs,the p-values werelized RMSE,NRMSE)values of 0.38(0.16),17.56μg cm-2(0.20),and 0.02 cm(0.51),*** to the values obtained for the traditional PROSAIL model,for October,R2 values increased by 0.05 and 0.10 and NRMSE decreased by 0.09 and 0.02 for CCC and CEWT,respectively and RMSE decreased by 0.35μg cm-2 for *** feasibility of the inverse strategy for integrating pest-induced stress factors into the PROSAIL model,while establishing multiple LUTs under different pest-induced damage levels,was successfully demonstrated and can potentially enhance future vegetation parameter inversion and monitoring of bamboo forest health and ecosystems.

关键词： Moso bamboo Chlorophyll content Equivalent water thickness PROSAIL model Multiple LUTs Pantana phyllostachysae Chao Sentinel-2A/B images

Calcium-fortified fresh milk ameliorates postmenopausal osteoporosis via regulation of bone metabolism and gut microbiota in ovariectomized rats

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Food Science and Human Wellness 2024年第3期13卷 1258-1270页

作者： Qishan Wang bin liu Xianping li Junying Zhao Zongshen Zhang Weicang Qiao Xinyue Wei lijun Chen School of Bioengineering Dalian Polytechnic UniversityDalian 116034China National Engineering Research Center of Dairy Health for Maternal and Child Beijing Sanyuan Foods Co.Ltd.Beijing 100163China Beijing Engineering Research Center of Dairy Beijing Sanyuan Foods Co.Ltd.Beijing 100163China

The aging of the global population has made postmenopausal osteoporosis prevention essential;however,pharmacological treatments are ***,we evaluate the effect of calcium-fortified fresh milk(FM)in ameliorating postmenopausal osteoporosis in a rat model established using bilateral *** 3 months of FM(containing vitamin D,and casein phosphopeptides,1000 mg Ca/100 g)or control milk(110 mg Ca/100 g milk)supplementation,bone changes were assessed using dual-energy X-ray absorptiometry,microcomputed tomography,and bone biomechanical *** results revealed that FM can regulate bone metabolism and gut microbiota composition,which act on bone metabolism through pathways associated with steroid hormone biosynthesis,relaxin signaling,serotonergic synapse,and unsaturated fatty acid ***,FM administration significantly increased bone mineral content and density in the lumbar spine and femur,as well as femoral compressive strength,while improving femoral trabecular bone parameters and ***,we found that the effects may be due to increased levels of estrogen,bone formation marker osteocalcin,and procollagen typeⅠN-propeptide,and decreased expression of the bone resorption marker C-telopiptide and tartrate-resistant acid phosphatase ***,the findings suggest that FM is a potential alternative therapeutic option for ameliorating postmenopausal osteoporosis.

关键词： Dairy products Calcium Vitamin D Bone turnover markers Gut microbiota Postmenopausal osteoporosis

Preoperative Corticosteroid Usage and Hypoalbuminemia Increase Occurrence of Short-term Postoperative Complications in Chinese Patients with Ulcerative Colitis

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Chinese Medical Journal 2016年第4期129卷 435-441页

作者： ji li Hong Lyu Hong Yang Yue li Bei Tan Ming-Ming Wei Xi-Yu Sun jing-Nan li bin Wu jia-Ming Qian Department of Gastroenterology Peking Union Medical College Hospital Peking Union Medical College Chinese Academy of Medical Sciences Beijing 100730 China Department of Gastroenterology Peking University International Hospital Peking University Beijing 102206 China Department of General Surgery Peking Union Medical College Hospital Peking Union Medical College Chinese Academy of Medical Sciences Beijing 100730 China

Background： Clarifying the risk factors for postoperative complications and taking measures to minimize these complications will improve the outcomes in patients with ulcerative colitis （UC）.This study aimed to systemically explore the risk factors for short-term postoperative complications in Chinese UC patients undergoing ileocolorectal ***： Forty-nine UC patients undergoing proctocolectomy or ileostomy were retrospectively *** and multivariate logistic regression analyses were conducted to reveal the risk factors among the clinical, laboratory, and surgical variables as well as preoperative ***： Twenty-two （44.9%） patients who suffered from at least one short-term postoperative event had more severe hypoalbuminemia （P =0.007） and an increased prevalence of preoperative corticosteroid usage （prednisone more than 20 mg daily or equivalent） for more than 6 weeks （59.1% vs.25.9%, P =0.023） compared with patients without short-term postoperative *** on the multivariate logistic regression analysis, the odds ratio （95% confidence interval） values of these two risk factors were 1.756 （0.889-3.470, P =0.105） and 3.233 （0.916-11.406, P =0.068）, *** 32 severe UC patients, prolonged preoperative hospital stay worsened the short-term postoperative ***： Preoperative corticosteroids usage and hypoalbuminemia worsened the short-term outcomes following ileocolorectal surgery in Chinese UC patients.

关键词： Corticosteroids Hypoalbuminemia Postoperative Complication Ulcerative Colitis

Synthesis of cyclopentenyl and cyclohexenyl ketones via [3 + 2] and [4 + 2] annulations of 1,2-allenic ketones

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Chinese Chemical Letters 2014年第1期25卷 55-57页

作者： liang-Yan Cui Sheng-Hai Guo bin li Xin-Ying Zhang Xue-Sen Fan School of Chemistry and Chemical Engineering Key Laboratory of Green Chemical Media and ReactionsMinistry of EducationHenan Key Laboratory for Environmental Pollution ControlHenan Normal University

In this paper, an efficient synthesis of cyclopentenyl ketones and cyclohexenyl ketones through tertiary phosphine catalyzed [3 ＋ 2] and [4 ＋ 2] annulations of 1,2-allenic ketones with activated alkenes has been developed. Compared with published synthetic methods on cyclopentenyl ketones and cyclohexenyl ketones, the protocols developed in this paper have the advantages such as readily available starting materials, mild reaction conditions and high efficiency.

关键词： Cyclopentenylketone Cyclohexenyl ketone 1 2-Allenic ketone Phosphine-catalyzed annulation

Secret Sharing Scheme Based on the Differential Manifold

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Applied Mathematics 2023年第3期14卷 173-181页

作者： bin li School of Mathematics Chengdu Normal University Chengdu China

In this paper, the concepts of topological space and differential manifold are introduced, and it is proved that the surface determined by function F (x2, x2, …, xt) of class Cr in Euelidean Rt is a differential manifold. Using the intersection of the tangent plane and the hypernormal of the differential manifold to construct the shared master key of participants, an intuitive, secure and complete (t,n)-threshold secret sharing scheme is designed. The paper is proved to be safe, and the probability of successful attack of attackers is only 1/pt-1. When the prime number p is sufficiently large, the probability is almost 0. The results show that this scheme has the characteristics of single-parameter representation of the master key in the geometric method, and is more practical and easy to implement than the Blakley threshold secret sharing scheme.

关键词： Topological Space Differential Manifold Secret Sharing Tangent Plane Hypernormal

Visible-light-initiated 4CzIPN catalyzed multi-component tandem reactions to assemble sulfonated quinoxalin-2(1H)-ones

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Chinese Chemical Letters 2022年第3期33卷 1479-1482页

作者： Zhiwei Wang Qishun liu Ruisheng liu Zhongyin ji Yan li Xiaohui Zhao Wei Wei School of Chemistry and Chemical Engineering Qufu Normal UniversityQufu 273165China Qinghai Provincial Key Laboratory of Tibetan Medicine Research and Key Laboratory of Tibetan Medicine Research Northwest Institute of Plateau BiologyChinese Academy of SciencesQinghai 810008China

A mild and efficient photochemical multi-component tandem reaction of quinoxalin-2(1H)-ones, alkenes and sulfinic acids is reported. This tandem reaction could be conveniently carried out at room temperature by employing 4Cz IPN as the metal-free photocatalyst and dioxygen(air) as the environmentally benign oxidant. A number of sulfonated quinoxalin-2(1H)-ones were obtained in satisfactory yields with favorable functional group tolerance. Radical trapping experiment and fluorescence quenching experiments were performed to elucidate this visible-light mediated radical reaction process.

关键词： Visible-light Multi-component reaction Radical process Sulfonated quinoxalin-2(1H)-ones

Shape Evolution in Rotating ^(178)Os

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Chinese Physics Letters 2011年第11期28卷 79-82页

作者： HAO Xin ZHU li-Hua WU Xiao-Guang HE Chuang-Ye ZHENG Yun li li-Hua SUN Hui-bin li Guang-Sheng College of Physics and Technology Shenzhen UniversityShenzhen 518060 School of Physics and Nuclear Energy Engineering Beihang UniversityBeijing 100191 China Institute of Atomic Energy Beijing 102413

In order to investigate the evolution of X(5)in rotating ^(178)Os,an experiment populating ^(178)Os via the fusion evaporation reaction 154Sm(^(29)Si,5n)^(178)Os was performed at the HI-13 tandem accelerator at the China Institute of Atomic Energy(CIAE).lifetimes of excited states above 8^(+)in the yrast band in 178Os have been measured using the Doppler shift attenuation *** above 12^(+)states were measured for the first *** deduced transitional quadruple moments(Qt),together with the previous data using the recoil distance Doppler shift(RDDS)method are compared with theoretical calculations based on the X(5)model and the interaction Boson model(IBM).Above the 10^(+)states,the Qt values fit well with the X(5)*** present result suggests that the shape of a nucleus ^(178)Os keeps X(5)critical point symmetry as spin increases to at least 14^(+).The shape change of 178Os with spin increasing is similar to that of ^(176)Os.

关键词： method states