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61.
62.
63.
Marianne Spittel 《Fresenius' Journal of Analytical Chemistry》1966,217(5):368-369
Ohne Zusammenfassung 相似文献
64.
A. Jilek A. Ryánek A. del Campe F. Sierra F. Feigl P. Krumholz L. Guglialmelli J. Lukas Marianne Papafil R. Cernatesco I. Itaka Y. Aoki und W. Stahl 《Fresenius' Journal of Analytical Chemistry》1934,98(7-8):292-298
Ohne Zusammenfassung 相似文献
65.
Purification methods for proteomics samples are of crucial concern for improving the quality of the sample delivered to the
mass spectrometer. They constitute the link between the mass spectrometer and protein processing and peptide isolation steps
that usually require solvents, buffers, or detergents completely incompatible with MS-analysis conditions. This work describes
three new clean-up procedures using synthetic membranes and polymer media and compares them with standard procedures. The
efficiency of each of the purification procedures was studied via application to four standards and two membrane proteins.
This work highlights the importance of versatility in sample preparation, especially for MS-based proteomic investigations.
Figure PMF spectra obtained after MALDI-TOF measurements of bovine mitochondrial complex III (A) and complex IV (B) in-solution digests, with and without purification 相似文献
66.
Gabriela Bar-Nes Radford Hall Vikashni Sharma Marianne Gaborieau David Lucas Patrice Castignolles Robert G. Gilbert 《European Polymer Journal》2009,45(11):3149-3163
A process for RAFT-controlled radical polymerization in emulsion [36] has been applied to the polymerizations of isoprene and of butadiene in emulsion systems, with the goal of producing latex particles containing block copolymers of acrylic acid (stabilizer and starting polymer), styrene (second polymer) and isoprene or butadiene (third polymer). The microstructure of the polymer chains was examined using dual-detection size-exclusion chromatography, and the nanostructure of the materials was investigated by differential scanning calorimetry and solid-state nuclear magnetic resonance. Reactions were always slow (although faster than the corresponding processes in solution), and exhibited limited reinitiation by isoprene when in emulsion. The materials containing isoprene exhibit a nanostructure with a phase separation into high-Tg polystyrene-rich domains and low-Tg polyisoprene-rich domains, revealed by DSC and NMR. This has the potential to lead to barrier materials with novel physical properties. 相似文献
67.
Mateja Pogorevc Ulrike T. Strauss Marianne Hayn Kurt Faber 《Monatshefte für Chemie / Chemical Monthly》2000,220(2):639-644
Biocatalytic resolution of the tertiary terpene alcohol (±)-linalool was accomplished via hydrolysis of its corresponding acetate ester using two highly enantiospecific enzymes (E > 100). The latter were identified in a crude cell-free extract of Rhodococcus ruber DSM 43338 and could be separated by (partial) protein purification. Since they showed opposite enantiopreference, they were
termed (R)- and (S)-linalyl acetate hydrolase (LAH). The activity and selectivity of the enzyme preparations was markedly dependent on the fermentation
conditions. 相似文献
68.
The enantiomeric separation of various kinds of basic pharmaceuticals has been investigated in nonaqueous capillary electrophoresis (NACE) systems using an ion-pairing reagent in combination with cyclodextrins (CDs). The simultaneous addition to the methanolic background electrolyte (BGE) of (+)-S-camphorsulfonate or alkanesulfonates and an anionic beta-cyclodextrin derivative, heptakis(2,3-dimethyl-6-sulfato)-beta-cyclodextrin (HDMS-beta-CD), led to partial or complete enantioresolution in most cases. In the absence of ion-pairing reagent, the enantiomeric resolution obtained with this CD derivative was most often completely lost or strongly reduced, indicating the important role of ion-pairing in the chiral recognition mechanism in these NACE systems. The influence of the nature and concentration of the counterion and the anionic CD derivative on the enantioseparation of basic compounds was studied. Synergistic effects between these two kinds of charged additives were clearly observed. 相似文献
69.
70.
This review gives a survey of the approaches employed to obtain, enhance and tune selectivity in nonaqueous capillary electrophoresis (NACE). Recent developments in NACE are described and the effects of background electrolyte composition and addition of selectors on separation selectivity are discussed. The use of one organic solvent, a mixture of several organic solvents or the use of additives to tune separation selectivity in NACE is presented and a list of relevant applications is included. 相似文献