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241篇 您的检索式:作者名="Heckmann"
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1颗粒物质控制膜污染的增强型膜生物反应器工艺的研究显示文摘用于废水处理的膜生物反应器工艺(MBR),是指通过膜过滤实现活性污泥与产水的分离的新型生化法处理废水技术.由于MBR具有占地面积小和出水水质好的优点,膜生物反应器成功应用到废水处理中的案例正在迅速增加.膜污染是MBR废水处理工艺面临的主要问题之一.膜污染会导致膜的渗透性能降低,为此必须通过化学清洗才能恢复膜的性能.为了实现无化学清洗的MBR工艺,研究使用持续物理冲刷去除膜污染层的方法.在活性污泥中加入颗粒物质(粉料),通过这些颗粒物质的持续冲刷作用实现去除膜污染层的目的.经过8个多月的实验,膜组件的渗透性能保持不变,通量可以达到40 L/(m2.h)以上.系统安装了在线的浊度仪作为产水质量的检测,在试验过程中,浊度始终没有变化.作为对比,同时也进行了一个参照实验(MBR标准工艺,没有加入颗粒物质),实验结果表明,传统的MBR工艺的膜组件渗透性能会不断下降导致通量下降,需要进行化学清洗.新型MBR工艺高通量和无需化学清洗的优势,将极大地提高MBR工艺的成本效益.Stefan Krause 学贤 董正军 Hans Joerg Heckmann 2010膜科学与技术2010,30,2:7
2Machine Learning Techniques for Predicting Crop Photosynthetic Capacity from Leaf Reflectance Spectra显示文摘在光合的能力利用自然变化是向收益增加的一条有希望的线路,但是生理的 phenotyping 为大规模基因屏幕仍然是太勤劳的。这里,我们评估叶反射光谱学的潜力预言在 Brassica oleracea 和 Zea mays, C 3 和 C 4 的光合的能力的参数分别地收割。到这个目的,我们系统地评估了反射系列的性质并且发现他们在大量种类上是令人惊讶地类似的。我们估计了 untransformed 系列上的方法和选择递归的特征消除作为产出最高预兆的力量的比较喜欢的算法由部分最少的广场回归跟随了的大量机器学习的表演。这个算法的学习曲线建议最佳的种类特定的样品尺寸。用 Brassica 相对 Moricandia,我们评估了在种类之间的模型可转移性并且发现跨种类的性能不能从种系发生的最近被预言。最后的 intra 种类模型预言庄稼有高精确性的光合的能力。在估计的模型精确性上基于,我们在选择繁殖实验模仿了模型的使用,并且证明用我们的方法的高产量的光合的 phenotyping 有潜力极大地改善引起成功。我们的结果显示叶反射 phenotyping 是为改善的一个有效方法收割光合的能力。David Heckmann Urte Schluter Andreas P.M. Weber 2017Molecular Plant2017,10,6:4
3Should antibiotics be administered before arthroscopic knee surgery? A systematic review of the literature显示文摘AIM To explore the current evidence surrounding the administration of prophylactic antibiotics for arthroscopic knee surgery. METHODS Databases were searched from inception through May of 2018 for studies examining prophylactic antibiotic use and efficacy in knee arthroscopy. Studies with patient data were further assessed for types of arthroscopic procedures performed,number of patients in the study,use of antibiotics,and outcomes with the intention of performing a pooled analysis. Data pertaining to 'deep tissue infection' or 'septic arthritis' were included in our analysis. Reported data on superficial infection were not included in our data analysis. For the pooled analysis,a relative risk ratio was calculated and χ~2 tests were used to assess for statistical significance between rates of infection amongst the various patient groups. Post hoc power analyses were performed to compute the statistical power obtained from our sample sizes. Number needed to treat analyses were performed for statistically significant differences by dividing 1 by the difference between the infection rates of the antibiotic and no antibiotic groups. An alpha value of 0.05 was used for our analysis. Study heterogeneity was assessed by Cochrane's Q test as well as calculation of the I^2 value.RESULTS A total of 49682 patients who underwent knee ar-throscopy for a diverse set of procedures across 19 studies met inclusion critera for pooled analysis. For those not undergoing graft procedures,there were 27 cases of post-operative septic arthritis in 34487 patients(0.08%) who received prophylactic antibiotics and 16 cases in 10911(0.15%) who received none [risk ratio(RR) = 0.53,95% confidence interval(CI): 0.29-0.99,P = 0.05]. A sub-group analysis in which bony procedures were excluded was performed which found no significant difference in infection rates between patients that received prophylactic antibiotics and patients that did not(P > 0.05). All anterior cruciate ligament reconstruction studies used prophylactic antibiotics,but two studies investigating the effect of soaking the graft in vancomycin in addition to standard intravenous(IV) prophylaxis were combined for analysis. There were 19 cases in 1095 patients(1.74%) who received IV antibioitics alone and no infections in 2034 patients who received IV antibiotics and had a vancomycin soaked graft(RR = 0.01,95%CI: 0.001-0.229,P < 0.01).CONCLUSION Prophylactic antibiotics are effective in preventing septic arthritis following simple knee arthroscopy. In procedures involving graft implantation,graft soaking reduces the rate of infection.John Carney Nathanael Heckmann Erik N Mayer Ram K Alluri Carleton Thomas Vangsness George F Hatch Ⅲ Alexander E Weber 2018World Journal of Orthopedics2018,9,11:2
4Studies of image quality and dose in digital subtraction angiography显示文摘Heckmann H Kamm KF Vetter S 1997Aktuelle Radiol1997,7,4:1
5Myasthenia gravis in South Africans: racial differences in clinical manifestations 显示文摘Heckmann JM Owen EP Little F 2007Neuromuscul Disord2007,17,:1
6Oral mucosal blood flow in patients with burning mouth syndrome显示文摘Heckmann S M Heckmann J G Hilz M J 2001Pain2001,90,3:1
7Addressing Challenges ofUbiquitous User Modeling:BetweenMediation and Semantic Integration显示文摘Berkovsky S Heckmann D Kuflik T 2009Advances in Ubiquitous User Modelling2009,5830,:1
8Decline in infantile hypertrophic pyloric stenosis in Germany in 2000-2008显示文摘De Laffolie J Turial S Heckmann M 0,,04:1
9Molecular mechanism of stop codon recognition by eRF1 : a wobble hypothesis for peptide anticodons 显示文摘Muramatsu T Heckmann K Kitanaka C 2001FEBS Lett2001,488,3:1
10Making scents, improvement of olfactory profile after botulinum toxin -- A treatment in healthy individuals显示文摘Heckmann M Kutt S Dittmar S 2007Dermatol Surg2007,33,1:1
11Low-doseefficacy of botulinum toxin A for axillary hyperhidrosis:arandomized,side-by-side,open-labelstudy显示文摘HECKMANN M PLEWIGG 2005Arch Dermatol2005,41,10:1
12A computational model for metric space显示文摘Edalat A Heckmann R 1998Theoretical Computer Science1998,193,:1
13Modal muhifield approach for an extended flex- ible body description in multibody dynamics显示文摘HECKMANN Andreas ARNOLD Martin VACULIN Ondrej 2005Multi- body System Dynamics2005,13,3:1
14Approximation of metric spaces by partial metric spaces显示文摘Heckmann R 1999Applied Categorical Structures1999,7,:1
15Nuclear processes in Euplotes octocarinatus during conjugation显示文摘Kuhlmann HW Heckmann K 1991Eur J Protistol1991,26,34:1
16High-strength large-diameter pipe for long-distance high-pressure gas pipelines显示文摘Graef M K Hillenbrand H G Heckmann C J 2004International Journal of Offshore and Polar Engineering2004,14,1:1
17Early decompressive Craniectomy and duraplasty for refractory intracranial hypertension in children : results of a pilot study 显示文摘RUF B HECKMANN M SCHROTH I 2003Critcaral Care2003,7,:1
18A flexible rule - based method for interlinking, integrating, and enriching user data 显示文摘Leonardi E Abel F Heckmann D 2010Web Engineering2010,,6189:1
19The macronuclear gamma-tubulin-encoding gene of Euplotes octocarinatus contains two introns and an in-frame TGA显示文摘Liang A Heckmann K 1993Gene1993,136,12:1
20TCP: Local stability and Hopf bifurcation显示文摘Raina G and Heckmann O 2007Performance Evaluation2007,64,3:1
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