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119篇 您的检索式：作者名="Krans"

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	题名	作者	年代	出处	被引量
1	Systematic variation of the sodium/sulfur promoter content on carbon-supported iron catalysts for the Fischer–Tropsch to olefins reaction显示文摘The Fischer–Tropsch to olefins(FTO) process is a method for the direct conversion of synthesis gas to lower C_2–C_4olefins. Carbon-supported iron carbide nanoparticles are attractive catalysts for this reaction.The catalytic activity can be improved and undesired formation of alkanes can be suppressed by the addition of sodium and sulfur as promoters but the influence of their content and ratio remains poorly understood and the promoted catalysts often suffer from rapid deactivation due to particle growth. A series of carbon black-supported iron catalysts with similar iron content and nominal sodium/sulfur loadings of 1–30/0.5–5 wt% with respect to iron are prepared and characterized under FTO conditions at 1and 10 bar syngas pressure to illuminate the influence of the promoter level on the catalytic properties.Iron particles and promoters undergo significant reorganization during FTO operation under industrially relevant conditions. Low sodium content(1–3 wt%) leads to a delay in iron carbide formation. Sodium contents of 15–30 wt% lead to rapid loss of catalytic activity due to the covering of the iron surface with promoters during particle growth under FTO operation. Higher activity and slower loss of activity are observed at low promoter contents(1–3 wt% sodium and 0.5–1 wt% sulfur) but a minimum amount of alkali is required to effectively suppress methane and C_2–C_4paraffin formation. A reference catalyst support(carbide-derived carbon aerogel) shows that the optimum promoter level depends on iron particle size and support pore structure.	Martin Oschatz Nynke Krans Jingxiu Xie Krijn P.de Jong	2016	Journal of Energy Chemistry2016，25，6：	2
2	In vivo reversal of multidrug resistance by two new dihydropyridine derivatives,S16317 and S16324显示文摘	Krans BL Guilband N Peglion JL	1994	Acta Oncol1994，33，：	1
3	A new method for surface reconstruc- tion from laser scanner data显示文摘	Krans K Pfeifer N	1997	International Archives of Photogrammetry and Remote Sensing1997，32，3：	1
4	Type Ⅱ collagen degradation in articular cartilage fibrillation after cranial cruciate ligament transection in rats显示文摘	Stoop R Buma P van der Kran PM	2001	Osteoarthritis Cartilage2001，9，4：	1
5	Heat Shock Response in Heat Tolerant and Nontolerant Variants of Agros- tis palustris Huds 显示文摘	PARK S Y SHIVAJI R KRANS J V	1996	Plant Physiol1996，111，2：	1
6	Impaired activity-dependent FMRP translation and enhanced mGluR-dependent LTD in Frag-ile X premutation mice显示文摘	Iliff AJ Renoux AJ Krans A		0，，06：	1
7	The effects of elevated-CO_2 on physiological performance of Bryopsis plumosa显示文摘An increase in the level of atmospheric carbon dioxide(CO2) and the resultant rise in CO2 in seawater alter the inorganic carbon concentrations of seawater. This change, known as ocean acidification, causes lower p H in seawater and may affect the physiology of seaweed species. Accordingly, the main goal of the current study was to determine the physiological responses of Bryopsis plumosa to elevated-CO2. The results indicated that photosynthesis of B. plumosa was insignificantly affected to elevated-CO2, but photosynthetic pigment contents and phenolics were significantly decreased. The results obtained from the research reveal that B. plumosa may become physiologically advanced when exposed to CO2-induced ocean acidification. In particular, B. plumosa may be more able to compete with calcifying algae when it will become future predicted CO2 scenario.	YILDIZ Gamze DERE Sükran	2015	Acta Oceanologica Sinica2015，34，4：	1
8	Low-intensity pulsed ultrasound in the treatment of nonunions 显示文摘	Nolte PA van der Krans A Patka P	2001	J Trauma2001，51，4：	1
9	Adolescent pregnancies and obstetric outcomes in southeast Turkey: data from two regional centers 显示文摘	Arkan DC Kaplanoglu M Kran H	2010	Clin Exp Obstet Gynecol2010，37，2：	1
10	Insulin resistance syndrome and cardiovascular disease: genetics and connections to skeletal muscle function 显示文摘	Krans W	1999	Am Heart J1999，138，51：	1
11	Isolation and sequencing of porcine lipoprotein lipase cDNA and its use in multiallelic restriction fragment length polymorphism detection 显示文摘	Harbitz I Kristensen T Kran S	1992	Anim Genet1992，23，6：	1
12	Glutathioneascorbicacid antioxidant system in animals显示文摘	An Kran NA Ri Kirnaru T EKoban FA	1994	J Hat Med Res1994，22，：	1
13	A Highly Fluorescent pH Sensing Membrane for the ,a, lkaline pH Range Incorporating a BODIPY Dye 显示文摘	Hecht M Krans W Rurack K	2015	Ana/yst2015，138，1：	1
14	Type-dependent integra- tion frequency of human papillomaviros genomes in cervical lesions 显示文摘	Vinokurova S Wentzensen N Krans I	2008	Cancer Res2008，68，1：	1
15	Isolation and se- quencing of porcine lipoprotein lipase cDNA and its use in multiallelic restriction fragment length polymorphism detection显示文摘	Harbitz I Kristensen T Kran S	1992	Animal Genetics1992，23，：	1
16	Isolation and sequencing of porcine lipoprotein lipase cDNA and its use in multiallelic restric- tion fragment length polymorphism deteetion显示文摘	Harbitz I Kristensen T Kran S	1992	Animal Genet- ics1992，23，6：	1
17	Three channel phase-shifting interferometer using polarization-optics and a diffraction grating显示文摘	A Hettwer J Kran J Schwider	2000	Optical Engineering2000，39，4：	1
18	CSMD1 is a novel multi- ple domain complement - regulatory protein highly expressed in the central nervous system and epithelial tissues 显示文摘	Krans D M Elliott G S Chute H	2006	J Immunol2006，176，7：	1
19	Inhibition of NF-KB by opioids in T cells显示文摘	Bomer C Krans J	2013	J Immunol2013，191，9：	1
20	Management of type 2 diabetes:a challenge for patient and physician显示文摘	van den Arend IJ Stolk R P Krans H M	2000	Patient Educ Couns2000，40，2：	1

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