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Loss of preferred habitat and pollen limitation threatens reproduction in a rare mountain Paeonia delavayi

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Journal of Mountain Science 2016年第12期13卷 2147-2154页

作者： LI Wei PAN Wen-wen tan rui WANG Juan Yunnan Academy of Biodiversity Southwest Forestry University Departments of Biology Lishui Vocational & Technical College Key Laboratory of the State Forestry Administration for Conservation of Yunnan Rare Endangered & Endemic Plant /Key Laboratory of Yunnan Provincial for Forest Plant Cultivation and UtilizationYunnan Academy of Forestry

Paeonia delavayi is a wild tree peony species endemic to high-altitude regions in southwestern *** agricultural land expansion,however,not only causes its dwindling population size,but also poses a severe threat to its long-term *** our knowledge of the reproductive biology of *** is very limited,and some management misconceptions have further exacerbated the already worrisome situation,the aim of the present study is to provide some scientific evidence regarding habitat preference and breeding system of ***,and to help correct some management ***,morphological traits of *** populations growing in two different habitats(i.e.,the open area versus forest understory),including basal stem diameter,plant height and flower numbers per plant,were measured and compared with each other.A range of floral manipulation experiments was further conducted to study the extent of self-compatibility and pollen *** results showed that *** preferred the open habitat over forest understory as it generally grew bigger with thickerstems,and produced a higher number of flowers in the former ***,the open habitat should receive immediate priority for conservation action instead of being converted to agricultural land;also,*** is pollen limited,as evidenced by the fact that experimental flowers receiving supplemental non-self pollen generally displayed elevated seed production than flowers subjected to other treatments(e.g.,non-supplemental self pollen,non-supplemental non-self pollen and supplemental self pollen),which is consistent with reported observations that alpine plants are more likely to be pollen-limited than lowland *** suggest that human intervention might be necessary to guarantee the long-term persistence of *** as harsh alpine environment,intense competition for pollinators and different anthropogenic perturbations co-limit its reproductive success.

关键词： Paeonia delavayi Peony Alpine ecosystems Habitats Breeding system Pollen limitation

Leclercia adecarboxylata infective endocarditis in a man with mitral stenosis:A case report and review of the literature

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World Journal of Clinical Cases 2022年第29期10卷 10670-10680页

作者： rui tan Jiang-Quan Yu Jing Wang rui-Qiang Zheng Department of Critical Care Medicine Northern Jiangsu People’s HospitalYangzhou 225001Jiangsu ProvinceChina

BACKGROUND Infective endocarditis(IE) is a rare disease with a high mortality *** adecarboxylata(***) is a movable Gram-negative bacillus of enterobacteriaceae,and it can rarely be a pathogen which often affects immunodeficient *** are about three cases of immunocompetent patients with monomicrobial *** *** are only three reported cases of IE caused by *** in the *** mitral valve is often affected in IE,and the prognosis for IE with mitral valve lesions is often *** SUMMARY A 51-year-old man was found to have moderate to severe mitral stenosis on *** came to our Cardiothoracic Surgery Department for surgical management.A diastolic murmur was heard on auscultation of the heart in the mitral *** the second day of hospitalisation,he presented with slurred speech,reduced muscle strength in the left limb,and acute cerebral infarction on cranial computed *** treatment was decided to *** the ninth day of admission,the patient developed a sudden high fever and shock and was transferred to the Cardiac Intensive Care Unit,where echocardiogram revealed an anterior mitral valve leaflet *** empirical anti-infective treatment with vancomycin(1g q12h),an emergency valve replacement was *** culture identified *** treatment with piperacillin-tazobactam(4.5g q8h) was added for 4 ***-up echocardiography showed normal bioprosthetic valve function after mitral valve *** We report the first case of *** IE in China,and clinicians should pay attention to this pathogen.

关键词： Leclercia adecarboxylata Infective endocarditis Mitral valve Vegetation Cerebral infarction Case report

Plant Diversity as a Good Indicator of Vegetation Stability in a Typical Plateau Wetland

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Journal of Mountain Science 2014年第2期11卷 464-474页

作者： LI Wei tan rui YANG Yu-ming WANG Juan Southwest Forestry University Yunnan Academy of Biodiversity Key Laboratory of the State Forestry Administration for Conservation of Yunnan Rare Endangered & Endemic Plant Yunnan Academy of Forestry Key Laboratory of Yunnan Provincial for Forest Plant Cultivation and Utilization Yunnan Academy of Forestry

Biotic indicators have been widely used to monitor wetland health. However, few studies have explicitly evaluated if plant diversity could serve as a useful community-level indicator of wetland stability,especially when wetlands are confronted with anthropogenic perturbations. Based on three-year record of wetland plant species abundance in Napahai plateau wetland, Shangri-la under the influence of varying anthropogenic perturbation types, our study tests the impact of such perturbations on plant richness and the relationship between ecosystem temporal stability and plant richness, and further assesses the effectiveness of using plant diversity indicator to probe ecosystem temporal stability of Napahai plateau wetland and the potential mechanisms. The results showed that anthropogenic perturbations could have contributed significantly to realistic variation in plant diversity, and further demonstrated that ecosystem temporal stability was positively related to realistic variation in plant diversity. In particular, communities with high levels of diversity might have better capacity to dampen perturbation impacts than communities with low levels of diversity, and statistical averaging could have played an important role in causing greater stability in more diverse communities. Also, asynchrony might have a stabilizing effect on community stability, and diversity could have stabilized communities through both species asynchrony and population stability propagation. Therefore, our results suggest that plant diversity could be used as a useful indicator of the stability conditions of plateau wetland ecosystems confronted with anthropogenic perturbations, and the preservation of plant communities at sufficient abundance and diversity is necessary for maintaining healthy plateau wetlands and for sustaining their essential ecosystem functions and services.

关键词： Plateau wetland Plant diversity Community stability Ecological indicator

Quantitative understanding of phase segregation behaviors by precisely building discrete oligo-ester-b-oligo-olefin block copolymers

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Science China Chemistry 2024年第3期67卷 1008-1016页

作者： Yuxin Liu rui tan Haibing Wu Xue-Hui Dong Zhengbiao Zhang College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China State Key Laboratory of Radiation Medicine and Protection Soochow UniversitySuzhou 215123China South China Advanced Institute for Soft Matter Science and Technology School of Molecular Science and EngineeringSouth China University of TechnologyGuangzhou 510640China

Block copolymers(BCPs) with high Flory-Huggins parameter(χ) and balanced surface energy have aroused tremendous interest for ultra-small nanopatterns ***,high χ and balanced surface energy are generally *** fine tune of chain structure might be a useful way to achieve high χ and balanced surface *** realize this,the block copolymer with exactly uniform chain structure,i.e.,defined molecular structure,is highly desirable for accurately evaluating the phase ***,two kinds of discrete oligo ester-b-oligo olefin block copolymers with different chemical structures(oligo lactic acid-boligo olefin BCP,oLA_(n)-b-C_(m);oligo phenyl lactic acid-b-oligo olefin BCP,oPL_(n)-b-C_(m)) were modularly synthesized through iterative growth *** effect of chain structure on segregation strength and surface properties was quantitatively investigated using the discrete BCPs as precise *** the one hand,introducing rigid and nonpolar phenyl groups into oligo ester block has a negligible effect on the chemical incompatibility,as confirmed by the identical high χ values of oLA_(n)-b-C_(m) and oPL_(n)-b-C_(m)(χ_(oLA/C)=0.21 and χ_(oPL/C)=0.19).On the other hand,the incorporation of nonpolar phenyl groups creates balanced surface energy,that is,the high χ and balanced surface energy were simultaneously achieved by oPL_(n)-b-C_(m).Therefore,sub-10 nm perpendicular nanopatterns can be easily produced upon brief thermal treatment,demonstrating its potential application in semiconductor manufacturing with ultra-small feature *** discrete BCP can serve as a quantitative and exquisite model to study the critical contribution of chain structures on phase separation behavior,providing insightful understanding to facilitate the potential application in the chip process.

关键词： discrete polymer iterative growth self-assembly highχ balanced surface

Numerical simulation on solidification behavior and structure of 38CrMoAl large round bloom using CAFE model

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Journal of Iron and Steel Research International 2023年第6期30卷 1222-1233页

作者： rui-song tan Wei Liu Bo Song Shu-feng Yang Yong-feng Chen Xiao-tan Zuo Yan Huang School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China Wuhu Xinxing Ductile Pipe Co. Ltd.Wuhu 241002AnhuiChina

A coupled cellular automaton-finite element model was developed to simulate the solidification behavior and structure of 38CrMoAl large round bloom,in which mold electromagnetic stirring+final electromagnetic stirring was taken into consideration,under different superheat,casting speeds,and secondary cooling water *** trials for infrared temperature measurement and macro etch experiments of the post-test round bloom samples were used to verify the simulated solidification structure and temperature *** simulation results show that superheat and secondary cooling water flow have little influence on the surface temperature,center temperature,and center solid fraction while casting speed has a more obvious influence on solidification *** the increase in the casting speed of 0.02 m min^(-1),the solidification position is prolonged by about 1.64 *** the increasing specific water ratio by 0.02 L kg^(-1) each,the surface temperature of the secondary cooling zones decreases by about 18℃,and the solidification position shortens by about 0.11 *** the superheat increases from 10 to 40℃,the ratio of the equiaxed crystal zone decreases from 35.98% to 23.98%.The casting speed and secondary cooling water flow increase the equiaxed crystal ratios of the large round bloom,but neither is significant,both being about 2%.

关键词： 38CrMoAl large round bloom CAFE model Solidification structure Superheat Casting speed Secondary cooling water flow

Effect of gel time of 3D sand printing binder system on quality of sand mold/core

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China Foundry 2021年第6期18卷 581-586页

作者： Yan Wang rui-long Yu Shao-kui Yin rui tan Yan-chun Lou Shenyang Research Institute of Foundry Co. Ltd.Shenyang 110022China State Key Laboratory of Light Alloy Casting Technology for High-end Equipment Shenyang 110022China

Two important factors affecting the performance of sand mold/core generated by 3D printing(3DP)are strength and dimensional accuracy,which are not only closely related to the reactivity of furan resin and the phase transition of silica sand,but also the curing agent system of furan *** paper studies the influence of gel time on the strength and dimensional accuracy of a 3DP sand mold/core,taking the furan resin system as an example and using a sand specimen generated by a 3DP inkjet molding *** experiment demonstrates that the gel time of 3 to 6 min for the sand mixture suits 3DP core-making most under the experimental ***,it should be noted that under the same resin condition,the strength of a no-bake sand mold/core is higher than that of a 3DP sand mold/*** dimensional accuracy of the sand mold/core does not change significantly when the gel time is less than 15 *** the activity of binder and developing ultra-strong acid with low corrosion shall be an effective way to improve the quality of the mold/core by 3D printing.

关键词： 3D sand printing gel time sand strength dimensional accuracy

Reductions to Korteweg-de Vries Soliton Hierarchy

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Communications in Theoretical Physics 2006年第2期45卷 231-235页

作者： CHEN Jin-Bing tan rui-Mei GENG Xian-Guo Department of Mathematics Southeast University Nanjing 210096 China Department of Mathematics Zhengzhou University Zhengzhou 450052 China Department of Information and Computational Science Zhengzhou University of Light industry Zhengzhou 450002China

Based on the nonlinearization of Lax pairs, the Korteweg-de Vries （KdV） soliton hierarchy is decomposed into a family of finite-dimensional Hamiltonian systems, whose Liouville integrability is proved by means of the elliptic coordinates. By applying the Abel-Jacobi coordinates on a Riemann surface of hyperelliptic curve, the resulting Hamiltonian flows as well as the KdV soliton hierarchy are ultimately reduced into linear superpositions, expressed by the Abel-Jacobi variables.

关键词： KdV soliton hierarchy Hamiltonian systems Riemann surface Abel-Jacobi coordinates

Stereodynamics Study of Li+HF/DF/TF→LiF+H/D/T Reactions on X^(2)A'Potential Energy Surface

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Chinese Physics Letters 2012年第12期29卷 65-69页

作者： tan rui-Shan LIU Xin-Guo HU Mei College of Physics and Electronics Shandong Normal UniversityJinan 250014

The product rotational polarizations of reactions Li+HF/DF/TF at different collision energies are calculated using the quasi-classical trajectory method based on a new potential energy surface constructed by Aguado and Paniagua[***.119(2003)10088].We investigate the P(θr)distributions describing the k-j'correlation,the P(φr)distributions describing the k-k'-j'correlation,and the four polarization-dependent generalized differential cross ***,we compare the influences of mass factor and collision energy in detail and find that the isotope substitution has more impact on the distribution of the product's angular momentum vectors than the collision energy.

关键词： collision substitution momentum

Primary prevention of cardiovascular disease in older adults in China

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World Journal of Clinical Cases 2017年第9期5卷 349-359页

作者： Jian Yong Dong Lin Xue-rui tan First Affiliated Hospital of Shantou University Medical College

Over the past two decades, the percentage of Chinese who is 60 years or older has increased from 5.2% in 1995 to 10.5% in 2015. Approximately 16% of the population in China was 60 years old and above in 2015. Since 1990, cardiovascular disease(CVD) has been the leading cause of death in China. Cardiovascular medications of older adults are usually more complicated than younger age groups due to polypharmacy, the presence of comorbidities and more susceptible to treatmentrelated adverse outcomes. Therefore, effective primary prevention of CVD for older adults is important in sustaining the health of older adults and reducing the burden of the healthcare system. Proper management of CVD-related risk factors, such as hypertension, dyslipidemia, diabetes and obesity, can remarkably reduce risks of CVDs in older Chinese. These risk factors can be modified by managing blood pressure, glucose and lipids via lifestyle modifications or receiving medications. Smoking cessation, healthy diets, strict alcohol intake and moderate physical exercise are examples of recommended lifestyle changes for remarkably recovering health conditions of older adults who have hypertension, dyslipidemia, obesity, diabetes or complications. Treatment prescriptions of older adults, in general, are recommended to be individualized and to be initiated at a low dose. The future directions for better primary CVD prevention in older adults include establishing guidelines for primary prevention of CVD for different older adults and further research on better management strategies of CVD risks for elderly Chinese.

关键词： Cardiovascular disease Primary prevention Adults China Aged