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91.
Two‐Photon Excitation of Porphyrin‐Functionalized Porous Silicon Nanoparticles for Photodynamic Therapy 下载免费PDF全文
Emilie Secret Marie Maynadier Audrey Gallud Arnaud Chaix Elise Bouffard Magali Gary‐Bobo Nathalie Marcotte Olivier Mongin Khaled El Cheikh Vincent Hugues Mélanie Auffan Céline Frochot Alain Morère Philippe Maillard Mireille Blanchard‐Desce Michael J. Sailor Marcel Garcia Jean‐Olivier Durand Frédérique Cunin 《Advanced materials (Deerfield Beach, Fla.)》2014,26(45):7643-7648
92.
Kurniawan Mario Stich Michael Marimon Mayra Camargo Magali Peipmann Ralf Hannappel Thomas Bund Andreas 《Journal of Materials Science》2021,56(20):11866-11880
Journal of Materials Science - Photoelectrochemical (PEC) water splitting can be an efficient and economically feasible alternative for hydrogen production if easily processed photoelectrodes made... 相似文献
93.
Magali Brunet Emmanuel Scheid Karolina Galicka-Fau Michel Andrieux Corinne Legros Isabelle Gallet Michaële Herbst Sylvie Schamm 《Microelectronic Engineering》2009,86(10):2034-2037
This work deals with high-density integrated capacitors for output filters in future micro DC–DC converters. To reach high capacitance density, 3D structures were created in silicon with DRIE followed by MOCVD of ZrO2 (100 nm thick). The step coverage revealed two deposition regimes: a surface reaction controlled regime for cavities aspect ratio lower than 2 and a diffusion-controlled regime for higher aspect ratios. The ZrO2 films present mostly a cubic/tetragonal structure. The permittivity extracted from the measurement is 26.4. These results are discussed with static dielectric responses calculated in literature. 相似文献
94.
Seisenbaeva GA Gohil S Kessler VG Andrieux M Legros C Ribot P Brunet M 《Journal of nanoscience and nanotechnology》2011,11(9):8302-8308
Strontium titanate SrTiO3 thin films are highly perspective as gate dielectric material. Difference in volatility of the common homometallic precursors-strontium beta-diketonates and titanium alkoxides remains major hinder for preparation of high quality coatings based on this phase. An attractive alternative in its synthesis by MOCVD is provided by application of heterometallic mixed-ligand complexes, Sr2Ti2(beta-diket)4(OR)8(ROH)x. Mass-spectrometric study reveals, however, that none of these species can be considered a true single-source precursor. The relative stability of the molecules in solution and the congruence of in-situ release of homometallic species on evaporation are, on the other hand, crucial for the quality of the produced films and are strongly influenced by the nature of alkoxide ligands, OR. The historically first discovered representative of this heterometallic family, a sec-alkoxide derivative Sr2Ti2(thd)4(O(i)Pr)8, is in fact unexpectedly unstable, transforming in solution into Sr2Ti(thd)4(O(i)Pr)4((i)PrOH), which explains difficulties in keeping the correct stoichiometry using isopropoxide precursor. The primary alkoxide complexes, Sr2Ti2(thd)4(OR)8(ROH)2, R = Et, (n)Pr are also unstable yielding Sr4Ti2(thd)4(OR)8(ROH)2 on decomposition. The best solution stability and most uniform evaporation was observed for the iso-derivative, Sr2Ti2(thd)4(O(i)Bu)8, permitting to apply it in long term experiments under industrial process conditions. Present contribution provides detailed experimental comparison between and sec-and iso-alkoxide derivatives and sheds light on the influence of the ligand on molecular stability of a precursor and how it influences the quality of the derived oxide film, especially in relation to its electrophysical properties. 相似文献
95.
Matteo Lualdi Sara Lögdberg Francesco Regali Magali Boutonnet Sven Järås 《Topics in Catalysis》2011,54(13-15):977-985
A series of different mechanical mixtures of a narrow-pore Co/γ-Al2O3 catalyst and a Cu-based WGS-catalyst has been investigated in the low-temperature Fischer–Tropsch synthesis (483 K, 20 bar) with a model bio-syngas (H2/CO = 1.0) in a fixed-bed reactor. The higher the fraction of WGS-catalyst in the mixture, the lower is the Co-catalyst-time yield to hydrocarbons. This is ascribed to a strong positive kinetic effect of water on the Fischer–Tropsch rate of the Co-catalyst, showing the importance of the indigenously produced water, especially in fixed-bed reactors where the partial pressure of water is zero at the reactor inlet. A preliminary kinetic modeling suggests that the reaction order in P $ _{{{\text{H}}_{ 2} {\text{O}}}} $ is 0.3 for the Co/γ-Al2O3 catalyst in the range of the studied reactor-average partial pressures of water (i.e., 0.04–1.2 bar). 相似文献
96.
Valerie Guillet Magali Vatton Gaëlle Guehenneux Patrick Baussand 《Polycyclic Aromatic Compounds》2013,33(3-4):589-599
Dioxins are among aromatic compounds that at present arouse the most part of discussions as environment pollutants. In the present works from the French norm AFNOR, there is no simple way of sampling and analysis for gas emissions. Solid-phase microextraction (SPME) proves to be an adapted technology for dioxin sampling in gaseous phase due to its rapidity, reliability, and simplicity of material. In this study, a sample preparation method with a 100 w m polydimethylsiloxane fiber interfaced with a gas chromatography has been optimized for a monochlorinated dibenzo- p -dioxin: exposure of the fiber into the gaseous sample during 1 hr at 125°C. The partition coefficient fiber/matrix of the 1-monochlorinated dibenzo- p -dioxin has also been calculated versus temperature (K = 5.85 at 125°C). 相似文献
97.
Film-boiling heat transfer is a key phenomenon governing severe accident sequence in a sodium-cooled fast reactor. Experimental the fuel-coolant interaction process which may occur during a and theoretical work on film-boiling heat transfer in sodium has hardly been carried out in the past. An experiment has been conducted in the early seventies to investigate sodium pool boiling. In this experiment, a hot tantalum sphere was immersed into subcooled liquid sodium. Film boiling was obtained for various sets of parameters: sodium subcooling from 4.1 K to 29. 1 K, initial sphere temperature ranging from 1,802.6 K to 2,633.7 K, sphere diameters of 1.27, 1.91 and 2.54 cm and sodium depths of 7.6 cm and 11.4 cm. In the present work, a simplified analysis based on the boundary layer theory is developed to describe pool film-boiling heat transfer on a hot sphere in liquid sodium. Two extreme cases are considered depending on sodium subcooling. In the case of high subcooling, most of the heat lost by the sphere is used to heat the sodium while for low subcooling, it is used to vaporize the liquid at the liquid-vapor interface. It will be shown that the scaling analysis predicts the heat fluxes within the order of magnitude when compared to the available experimental data. Besides, it allows an estimation of the contribution of these fluxes to the liquid heating and vaporization processes. 相似文献
98.
Separation of metals in the cationic form is the basis of hydrometallurgy. Ion-specific separation is achieved via selective transfer between liquid phases that have been emulsified in order to be in “close” contact. We show here how the organization of water-in-oil (w/o) “reverse” aggregates in the solvent phase controls the free energy of transfer of cations in the form of neutral salts between phases. Indeed, all known efficient ion separation mechanisms rely on complex fluids in the Winsor II regime, i.e. when a concentrated mixed salt solution is in equilibrium with a solvent phase containing self-assembled aggregates. Here, we point out that, in the general case of water-poor complex fluids containing extractant molecules, long-range interactions linked to w/o interface curvature participate in the selectivity of any multivalent ion extraction process. The free energy related to ion transfer between phases, i.e. the extraction free energy, is different from the complexation free energy. This difference is the key to the selectivity of the separation process. We give here general expressions linking complexation free energy and transfer free energy as derived from known adsorption isotherms, taking into account interfacial curvature, considered as a generalized scalar related to the packing near the interface. 相似文献
99.
Antonio Bisconsin-Junior Amauri Rosenthal Magali Monteiro 《Food and Bioprocess Technology》2014,7(6):1670-1677
The influence of high hydrostatic pressure (HHP) on Pêra Rio orange juice was investigated using response surface methodology. A central composite design was used to evaluate the effects of three processing conditions (independent variables), namely pressure (100–600 MPa), temperature (30–60 °C) and time (30–360 s), on the native microflora and pectin methylesterase (PME) activity of orange juice. Analysis of variance showed that second-order polynomial models fitted well with the experimental data for PME residual activity (R 2?=?0.9586, p?<?0.001) and aerobic microorganism count (R 2?=?0.9879, p?<?0.001). The optimum HHP processing conditions to produce orange juice with PME residual activity of less than 20 % and low microorganism count (<2 log cycles CFU/mL) were 550 to 600 MPa, 55 to 60 °C and 330 to 360 s. 相似文献
100.
Organogel-Based Emulsion Systems,Micro-Structural Features and Impact on In Vitro Digestion 总被引:2,自引:0,他引:2
Nicola Duffy Han C. G. Blonk Christiaan M. Beindorff Magali Cazade Arjen Bot Guus S. M. J. E. Duchateau 《Journal of the American Oil Chemists' Society》2009,86(8):733-741
Organogels based on edible oils and specific mixtures of phytosterols can serve as structured systems with a low saturated
fat content. These low-SAFA organogels can be used also to create o/w emulsions. Little is known about the structures formed
in these specific organogels and at the emulsion interface. We studied o/w organogels on different length scales to describe
and understand their micro-structural features. Very basic processing conditions such as composition, temperature and storage
time were taken into account. Two different types of structure were observed; at the smallest scale, long thin crystals are
formed out of the oil phase into the continuous water phase. We propose that these are needle-like crystals. Next, tube-like
structures are identified and can be visualized as tubular micelles. A model is proposed which fits the dimension (~7 nm)
with the length scale of the molecular building blocks (TAGs and sterols). As edible fats from food products are enzymatically
hydrolyzed in the gut prior to absorption, we also looked into the impact on the lipase reaction speed. Simple in vitro enzymatic
hydrolysis experiments showed a slower enzymatic digestion. Organogel systems and emulsion made thereof have interesting food
structuring properties with possible advantages in composition (low SAFA) and digestion speed.
All authors were full time employees or trainee (MC) of Unilever during actual execution of this study. 相似文献