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91.
Carola Esposito Corcione Mariaenrica Frigione 《Journal of Coatings Technology and Research》2017,14(3):597-606
The protective properties of two innovative, experimental nano-composite coatings which are mainly intended for the protection of cultural heritage stone artifacts were compared. The decay of artworks, monuments, and buildings made of stone materials is a natural and irreversible process. In order to protect stone artworks and buildings from natural decay, it is necessary to reduce the penetration of water into porous substrates by applying a highly hydrophobic protective coating on the stone surface. The performances of two nano-composite coatings containing an organo-modified boehmite nano-filler, applied on calcareous stone substrates typical of Apulia region (leccese stone, PL and gentile stone, PG), and activated by UV or sunlight radiations, were compared in order to establish the more suitable product for the specific stone substrate. 相似文献
92.
Niels Hadrup Vadim Zhernovkov Nicklas Raun Jacobsen Carola Voss Maximilian Strunz Meshal Ansari Herbert B. Schiller Sabina Halappanavar Sarah S. Poulsen Boris Kholodenko Tobias Stoeger Anne Thoustrup Saber Ulla Vogel 《Small (Weinheim an der Bergstrasse, Germany)》2020,16(21)
Inhaled nanoparticles constitute a potential health hazard due to their size‐dependent lung deposition and large surface to mass ratio. Exposure to high levels contributes to the risk of developing respiratory and cardiovascular diseases, as well as of lung cancer. Particle‐induced acute phase response may be an important mechanism of action of particle‐induced cardiovascular disease. Here, the authors review new important scientific evidence showing causal relationships between inhalation of particle and nanomaterials, induction of acute phase response, and risk of cardiovascular disease. Particle‐induced acute phase response provides a means for risk assessment of particle‐induced cardiovascular disease and underscores cardiovascular disease as an occupational disease. 相似文献
93.
Fluorinated Copper(I) Carboxylates as Advanced Tunable p‐Dopants for Organic Light‐Emitting Diodes 下载免费PDF全文
94.
Carola Hein 《Planning Perspectives》2013,28(4):325-344
This paper analyses the life and work of the French planner Maurice Rotival through his practical and theoretical work as well as his teachings in cities and regions in Europe, Africa and the Americas. Rotival's plans and projects reflect the influence of major events and changes of the twentieth century - two world wars and the advances in technology and research they promoted, the advent of the automobile, the subsequent urban transformations and large-scale demolitions - and influenced the development of planning in the twentieth century. Through five major steps of Rotival's international career, this article analyses the development of Rotival's pragmatic organic planning doctrine and his regional approach from his experience and training in France at the eve of the First World War, to his subsequent regional and urban planning work in Caracas, New Haven, Europe, Reims and other French cities until the 1980s. By considering Rotival's career as a part of economic globalization at a time when the colonial context was dismantled, the present article highlights the planner's role in societal transformation in collaboration with the e´lite and demonstrates the growing international exchange of planning ideas in the twentieth century. 相似文献
95.
Danny GUZMÁN Oscar RIVERA Claudio AGUILAR Stella ORDOÑEZ Carola MARTÍNEZ Daniel SERAFINI Paula ROJAS 《中国有色金属学会会刊》2013,23(7):2071-2078
Microstructural evolution during mechanical alloying of Ag and Zn, and subsequent heat treatments were investigated. The mechanical alloying was carried out in a SPEX 8000D miller. The microstructural characterization was obtained by X-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The thermal behavior was studied using differential scanning calorimetry (DSC). Based on the results obtained, it can be concluded that at the early stages of milling was possible to detect the ?, β, β′, α solid solutions and remaining Zn. Later, the ?, β, β′ and Zn phases disappeared while the Zn concentration of the α solid solution was strongly increased. After 7.2 ks of milling, the mechanical alloying process reached a steady state. During this period, both the composition and crystallite size of the α solid solution remained practically unchanged. On the other hand, subsequent heat treatments of milled powders showed that the α solid solution could also be obtained by the combination of mechanical alloying and heat treatment. Finally, the evolution of the microstructure during milling and annealing was combined to propose an optimal processing route in order to obtain a α solid solution. 相似文献
96.
I.P.S. Kapoor Bandana Singh Carola S. De Heluani M. P. De Lampasona Cesar A.N. Catalan 《International Journal of Food Properties》2013,16(5):1059-1070
Essential oil and oleoresins (ethanol, ethyl acetate, and iso-propyl alcohol) of Myristica fragrans were extracted by using Clevenger and Soxhlet apparatus, respectively. Gas chromatography-mass spectrometry analysis of essential oil showed the presence of 38 components representing about 99.6% of the total weight. Sabinene (29.4%) was found to be a major component along with beta pinene (10.6%), alpha pinene (10.1%), terpene-4-ol (9.6%), and several other minor components. The major component of all oleoresins contained elemicin. It has been observed that the essential oil and ethanol oleoresin showed better activity compared to other tested oleoresins and synthetic antioxidants, butylated hydroxyl anisole and butylated hydroxyl toluene. Furthermore, the activity of essential oil and oleoresins was measured for the inhibition of primary and secondary oxidation products in mustard oil by using peroxide, thiobarbituric acid, and p-anisidine values. In addition, these experiments were further supported by other complementary antioxidant assays, such as ferric thiocyanate method in a linoleic acid system, reducing power, chelating effect, and scavenging effects on 1,1′-diphenyl-2-picrylhydrazyl radical. Hence, the essential oil and ethanol oleoresin of M. fragrans could be considered as a natural food preservative. 相似文献
97.
Antonio Greco Alessandra Strafella Carola La Tegola Alfonso Maffezzoli 《Polymer Composites》2011,32(4):657-664
The aim of the present article is to study the different phenomena which are at the basis of the consolidation of commingled thermoplastic semi‐pregs made of amorphous polyester fibers and E‐glass reinforcement. The evolution of the void fraction during the consolidation of the composite was monitored by a dynamometer, equipped with parallel plates and a forced convection oven. Different physical changes were associated to the consolidation temperature. Scanning electron microscopy (SEM) and thermomecahnical analysis (TMA) showed that at low temperature, matrix fiber deformation and sintering are responsible of the initial void reduction. At a temperature higher than the onset of the flow region, reinforcement impregnation is responsible of the further void reduction. Dimensionless analysis confirmed that at lower temperatures, corresponding to higher viscosities, consolidation due to viscous flow of the polymer matrix is negligible compared to consolidation due to sintering of matrix fibers. The results indicate that the Darcy law can efficiently represent the consolidation during the microscale impregnation of the reinforcement, but cannot account for the initial stages of consolidation. POLYM. COMPOS., 2011. © 2011 Society of Plastics Engineers 相似文献
98.
M Bertinaria MA Shaikh C Buccellati C Cena B Rolando L Lazzarato R Fruttero A Gasco M Hoxha V Capra A Sala GE Rovati 《ChemMedChem》2012,7(9):1647-1660
A series of lumiracoxib derivatives were designed to explore the influence of isosteric substitution on balancing COX-2 inhibition and thromboxane A(2) prostanoid (TP) receptor antagonism. The compounds were synthesized through a copper-catalyzed coupling procedure and characterized for their pK(a) values. TP receptor antagonism was assessed on human platelets; COX-2 inhibition was determined on human isolated monocytes and human whole blood. TPα receptor binding of the most promising compounds was evaluated through radioligand binding assays. Some of the isosteric substitutions at the carboxylic acid group afforded compounds with improved TP receptor antagonism; of these, a tetrazole derivative retained good COX-2 inhibitory activity and selectivity. The identification of this tetrazole acting as a balanced dual-acting compound in human whole blood, along with SAR analysis of the synthesized lumiracoxib derivatives, might contribute to the rational design of a new class of cardioprotective anti-inflammatory agents. 相似文献
99.
Although the phosphorus atom is found in a variety of oxidation states, most of the phosphorus-containing molecules of pharmacological importance possess phosphorus in the form of phosphonate or phosphinate functional groups, or in a major oxidation state as a phosphate group. The most common occurrence of phosphorus in drugs is either in prodrugs or in compounds for which the phosphorus atom plays a role in the biological activity, such as in modified nucleotides, in metabolically stable analogues of metabolites bearing phosphate groups, and as bioisosteric analogues of carboxyl groups. 相似文献
100.
Ritva AM Repo‐Carrasco‐Valencia Christian R Encina Maria J Binaghi Carola B Greco Patrícia A Ronayne de Ferrer 《Journal of the science of food and agriculture》2010,90(12):2068-2073
BACKGOUND: Andean indigenous crops such as quinoa (Chenopodium quinoa), kiwicha (Amaranthus caudatus) and kañiwa (Chenopodium pallidicaule) seeds are good sources of minerals (calcium and iron). Little is known, however, about mineral bioavailability in these grains. Thus the aim of the present study was to determine the iron, calcium and zinc potential availability in raw, roasted and boiled quinoa, kañiwa and kiwicha seeds. Potential availability was estimated by dialyzability. RESULTS: These seeds are good sources of phenolic compounds and kañiwa of dietary fiber. Their calcium, zinc and iron content is higher than in common cereals. In general, roasting did not significantly affect mineral dialyzability. Conversely, in boiled grains there was an increase in dialyzability of zinc and, in the case of kañiwa, also in iron and calcium dialyzability. CONCLUSION: Taking into account the high content of minerals in Andean grains, the potential contribution of these minerals would not differ considerably from that of wheat flour. Further studies are required to research the effect of extrusion on mineral availability in Andean grains. Copyright © 2010 Society of Chemical Industry 相似文献