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21.
D.?P.?SinghEmail author Ramesh?Kumar Vandna?Malik Parikshit?Tyagi 《Transition Metal Chemistry》2007,32(8):1051-1055
A new series of complexes is synthesized by template condensation of glyoxal and oxalyldihydrazide in methanolic medium in
the presence of divalent cobalt, nickel, copper, zinc and cadmium salts forming complexes of the type: [M(C8H8N8O4)X2] where M = Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and X = Cl−1, Br−1, NO
3
−1
, OAc−1. The complexes have been characterized with the help of elemental analyses, conductance measurements, magnetic susceptibility
measurements, electronic, n.m.r., infrared and far infrared spectral studies. On the basis of these studies, a six coordinate
octahedral geometry for these complexes has been proposed. The biological activities of the metal complexes have been tested
in vitro against a number of pathogenic bacteria to assess their inhibiting potential. Most of the compounds have been found to exhibit
remarkable antibacterial activities. 相似文献
22.
Borhade N Pathan AR Halder S Karwa M Dhiman M Pamidiboina V Gund M Deshattiwar JJ Mali SV Deshmukh NJ Senthilkumar SP Gaikwad P Tipparam SG Mudgal J Dutta MC Burhan AU Thakre G Sharma A Deshpande S Desai DC Dubash NP Jain AK Sharma S Nemmani KV Satyam A 《Chemical & pharmaceutical bulletin》2012,60(4):465-481
In continuation of our efforts to discover novel nitric oxide-releasing non-steroidal anti-inflammatory drugs (NO-NSAIDs) as potentially "Safe NSAIDs," we report herein the design, synthesis and evaluation of 21 new NO-NSAIDs of commonly used NSAIDs such as aspirin, diclofenac, naproxen, flurbiprofen, ketoprofen, sulindac, ibuprofen and indomethacin. These prodrugs have NO-releasing disulfide linker attached to a parent NSAID via linkages such as an ester (compounds 9-16), a double ester (compounds 17-24), an imide (compounds 25-30) or an amide (compounds 31-33). Among these NO-NSAIDs, the ester-containing NO-aspirin (9), NO-diclofenac (10), NO-naproxen (11), and the imide-containing NO-aspirin (25), NO-flurbiprofen (27) and NO-ketoprofen (28) have shown promising oral absorption, anti-inflammatory activity and NO-releasing property, and also protected rats from NSAID-induced gastric damage. NO-aspirin compound 25, on further co-evaluation with aspirin at equimolar doses, exhibited comparable dose-dependent pharmacokinetics, inhibition of gastric mucosal prostaglandin E(2) (PGE(2)) synthesis and analgesic properties to those of aspirin, but retained its gastric-sparing properties even after doubling its oral dose. These promising NO-NSAIDs could therefore represent a new class of potentially "Safe NSAIDs" for the treatment of arthritic pain and inflammation. 相似文献
23.
Parikshit Goswami Richard S. Blackburn Jim Taylor Patrick White 《Cellulose (London, England)》2009,16(3):481-489
To understand the effect of alkali pre-treatment on the dyeing of lyocell fabrics, samples are pre-treated with 0.0–7.0 mol dm−3 NaOH using a pad-batch process and then dyed with different types of reactive dyes. Exhaustion, fixation, and visual colour
strength (K/S values) are measured. It is observed that sodium hydroxide pre-treatment significantly improves the colour yield, exhaustion,
and fixation for all dyes used. Highest K/S values are obtained when the fabrics are pre-treated with 2.0–2.5 mol dm−3 NaOH. Cross-sectional analysis shows that below this optimum concentration the core fibres in the yarn are not dyed; at optimum
concentration all fibres in yarn cross-section are homogeneously dyed. Cross-sectional analysis shows that as the pre-treatment
concentration of NaOH increases above 2.5 mol dm−3, the fibres change progressively from a circular to angular cross-section, forming a solid unit. The decrease in K/S above the treatment concentration of 2.5 mol dm−3, though the %E and %F remains almost constant, is attributed to the distribution of dye over a larger surface area of the outer fibres in the yarn
cross section, forcing the K/S at λmax to decrease.
This paper was presented at the 2nd International Cellulose Conference, Tokyo, Japan, 24th October 2007. 相似文献
24.
The growth of a new nonlinear optical material L‐valine by solvent evaporation method is reported here. To grow good quality crystals pH value of growth solution has been optimized and solubility of L‐valine in different solvents and different pH values was determined. The grown crystals were characterized by IR, single crystal XRD, DTA and TGA, optical transmission and second harmonic generation (SHG) efficiency measurement. SHG efficiency of L‐valine was found equivalent to KDP and its transmission is 75%‐80% from ultraviolet to near IR region. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) 相似文献
25.
26.
The Anderson hamiltonian has been studied for arbitrarily filled bands using the real space renormalization group (RSRG) method. The ground state energy is determined in one dimension for the scale factors ns = 3 and ns = 5. Direct application of RSRG gives, for a certain ns, the results for only ns number of discrete cases of band-filling. We then devise an interpolation scheme which spans the entire region of the band and gives the ground state energy for any general filling. The results, as provided by our scheme, satisfy the desired particle-hole symmetry exactly and are always an upper bound to the exact one. The non-linear dependence of the band energy on its filling is represented correctly, even for small ns. Finally, we discuss how the results improve for large ns. 相似文献
27.
28.
Exact analytic formulae are obtained for the electronic structure of an ordered binary alloy in a Bethe lattice described by a tight-binding hamiltonian that includes nearest neighbour and second nearest neighbour interactions. Some interesting results are obtained and discussed in the text. 相似文献
29.
30.
A. K. Bhattacharya R. K. Moitra A. Mukherji 《International journal of quantum chemistry》1975,9(3):385-392
In this communication we discuss a method of incorporating corrections to the coupled Hartree–Fock (CHF ) formalism by introducing the so-called “rearrangement effect.” In this we take account of the relaxation of the core orbitals when excitations from a starting Hartree–Fock wave function occur. The magnitude of this correction numerically is found to be quite significant for the polarizabilities of two-electron atomic systems, results for which are reported. 相似文献