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| 1 | Screening for congenital adrenal hyperplasia: adjustment of 17-hydroxyprogesterone cut-off values to both age and birth weight markedly improves the predictive Value显示文摘 | Ller BO Roseher AA Liebl B | 2003 | J Clin Endoernol Metab2003，88，12： | 1 |
| 2 | Manufacturing size effect on the structural and mechanical properties of additively manufactured Ti-6Al-4V microbeams显示文摘The size effect of Ti-6Al-4V submillimeter structures manufactured by selective laser melting,which is critical for metallic mechanical metamaterials of unique mechanical properties,for example,nega-tive Poisson’s ratio and ultrahigh modulus,which show promise in biomedical,environmental,energy-related applications,has not been systematically investigated.Presented here are the quantification of the porosities by X-ray microtomography scans,texture analysis,and mechanical characterization of the addi-tively manufactured Ti-6Al-4V microbeams.We found linearly decreasing porosities,increasing mechan-ical properties,and increasing texture in the microbeam with increasing diameter from 250 to 500μm.The variation of microstructure in microbeams of different diameters and along the sample height,result-ing from the printing parameters and the thermal conditions,leads to the discrepancy between the be-havior observed in experiments and finite element simulation.Our results provide the structure-property-processing correlation to improve the manufacturing and prediction of the mechanical behavior of metal-lic mechanical metamaterials. | Kaiyang Yin Bo Cao Juraj Todt Florian Gutmann Hasan Furkan Tunçay Antonina Roth Frank Fischer Nadira Grübel Aron Pfaff Georg C.Ganzenmüller Jozef Keckes Stefan Hiermaier Christoph Eberl | 2023 | Journal of Materials Science & Technology2023，，18： | 0 |
| 3 | Effects of forest canopy density and epixylic vegetation on nutrient concentrations in decaying logs of a subalpine fir forest显示文摘Background:Deadwood and the associated epixylic vegetation influence nutrient cycles in forest ecosystems.Open canopies strongly regulate deadwood decomposition and disrupt epixylic vegetation on logs.However,it is unclear how the forest canopy density and epixylic vegetation growth affect the nutrient concentrations in deadwood.Methods:We measured the concentrations of nitrogen(N),phosphorus(P),potassium(K),calcium(Ca),sodium(Na),magnesium(Mg),and manganese(Mn)in experimentally exposed decaying logs placed in gaps,at the edge of gaps,and under the closed canopy during a four-year decomposition experiment in a Subalpine Faxon fir forest(Abies fargesii var.faxoniana)on the eastern Qinghai-Tibetan Plateau,China.To assess the effect of the epixylic vegetation,we experimentally removed it from half of the logs used in the study.Results:Under open canopy conditions in the gap and at the edge,the concentrations for most of the nutrients in the bark and the highly decayed wood were lower than under the closed canopy.The effect of the epixylic treatment on nutrient concentrations for all but K and Na in barks varied with the decay classes.Significantly lower concentrations of N,P,Ca,and Mn following the removal of epixylic vegetation were observed in the wood of decay class IV.Epixylic vegetation significantly increased most nutrient concentrations for decaying barks and wood under open canopy conditions.In contrast,epixylic vegetation had no or minimal effects under the closed canopy.Conclusions:Forest canopy density and epixylic vegetation significantly alter the nutrient concentrations in decaying logs.Open canopies likely accelerate the rate of nutrient cycling between the epixylic vegetation and decaying logs in subalpine forests. | Zhuang Wang Wanqin Yang Bo Tan Qin Wang Lifeng Wang Chenhui Chang Rui Cao Yurui Jiang Jörg Müller | 2022 | Forest Ecosystems2022，9，5： | 0 |
| 4 | 青少年体力活动、久坐行为和长期心血管风险:综述及方法讨论的前瞻性研究(英文)显示文摘目前,体力活动或久坐行为对青少年心血管健康的长期影响尚不清楚。本研究采用叙事研究范式综述关于'健康青年中肥胖与其他心血管疾病生物学风险因素的关系'的前瞻性研究,所纳入研究的随访时间均超过2年。这些研究表明身体活动对肥胖,特别是对心血管健康指标有长期的有益影响,但其中少数研究提出较高水平的身体活动与较严重的肥胖相关。此外,在不考虑体力活动的情况下,久坐时间与肥胖和心血管健康指标并不相关。本文还讨论了隐含其中因果链的不确定性,并提出一些替代性建模策略,以提升未来研究中对这一关系的认识。本文最后探讨了现有评价体力活动及久坐时间的测量方法。 | Jakob Tarp Jan Christian Br?nd Lars Bo Andersen Niels Christian M?ller Karsten Froberg Anders Gr?ntved | 2016 | Journal of Sport and Health Science2016，5，2： | 0 |
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