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  • 1
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    Synthesis, characterization, and evaluation of Cd[L-proline]2, a novel histone deacetylase inhibitor that induces epigenetic modification of histone deacetylase isoforms in A549 cells (2017)
    Springer
    Details
    Publication Date: 2017-08-03
    Print ISSN: 0167-6997
    Electronic ISSN: 1573-0646
    Topics: Chemistry and Pharmacology , Medicine
    Published by Springer
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    PAPER CURRENT
  • 2
    Electronic Resource
    Electronic Resource
    Environmental geochemistry of the Pichavaram mangrove ecosystem (tropical), southeast coast of India (1999)
    Springer
    Environmental geology 37 (1999), S. 223-233 
    Details
    ISSN: 1432-0495
    Keywords: Key words Mangrove ; Geochemistry ; Biological productivity ; Anthropogenic impacts ; Heavy metal sink
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract  Spatial and temporal geochemical variations of various parameters in the water and sediment of a relatively small mangrove situated on the southeast coast of India were examined in detail for the first time. The water quality generally reflects the impact of seawater and the Vellar estuary (mixing effect) aided by evaporation and in situ biological productivity. The depletion and fluctuation of dissolved silica are controlled by biological processes. Nitrate and phosphate are contributed by fertilizer input from adjoining agriculture fields. Total suspended matter (TSM) shows an erratic range and trend due to deforestation and resuspension processes. Sand and silt constitute 70–90% of the sediments. Statistical analysis of the sediments shows the prevalence of a moderately high-energy environment with very effective winnowing activity. Organic matter content is higher in the mangrove sediments in comparison to adjacent estuaries. Water and sediment show fluctuations in their chemical concentration, but no specific trends could be identified. Heavy metals are also enriched in the mangrove sediments, indicating their unique chemical behavior and the existence of trapping mechanisms. Factor analysis and correlation analysis of water and sediments show the complexity of the system and the multitude of contributing sources. The core sediment chemistry suggests the depletion of metal input due to the damming of the detrital inputs. The Pichavaram mangrove seems to be relatively unpolluted, since the anthropogenic signal observed is small and acts as a sink for heavy metals contributed from a multitude of sources without an adverse effect.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002540050380
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  • 3
    Electronic Resource
    Electronic Resource
    Lysosome lipid storage disorder in NCTR-BALB/c mice: Spleen and lung lysosomes store unesterified cholesterol but differ in their phospholipid composition (2000)
    Springer
    Molecular and cellular biochemistry 214 (2000), S. 15-22 
    Details
    ISSN: 1573-4919
    Keywords: lysosomes ; spleen ; lung ; lipid storage disorder ; cholesterol ; NCTR-BALB/c mice
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract A strain derived from a colony of BALB/c mice at the National Center for Toxicological Research, Jefferson, AR, USA (NCTR-BALB/c) suffers from an autosomal recessive disorder characterized by proliferation of secondary lysosomes with accumulation of unesterified cholesterol in several tissues. The unesterified cholesterol content of spleens and lungs from the affected mice were elevated 8- and 3-fold respectively over age- and sex-matched controls. Postnuclear supernatants of tissue homogenates were fractionated by sucrose density gradient centrifugation and the fractions were analyzed for unesterified cholesterol, protein and marker enzyme activities for lysosomes (N-acetyl-b-D-glucosaminidase, β-D-glucuronidase), plasma membrane (alkaline phosphodiesterase I), endoplasmic reticulum (glucose-6-phosphatase) and mitochondria (cytochrome oxidase). The enzyme distribution profile showed that lysosomes of affected tissues floated at low density regions (density 1.05-1.08) of the gradient and contained substantial amount of tissue unesterified cholesterol. These low density lysosomes were purified about 17-fold (58% yield) from spleen and about 6-fold (32% yield) from lungs with minimal contamination by other organelles They were mostly intact as judged by high latency for N-acetyl-β-D-glucosaminidase activity (70-100%). Lysosomes of control tissues were not found at the low density regions. The distribution profiles for other organelles were similar between affected and control tissues. Phospholipid composition of low density lysosomes were distinctly different from their respective tissue homogenates. Spleen and lung lysosomes were enriched in sphingomyelin and phosphatidylcholine respectively. The results suggest that these lysosomes acquire their low densities due to accumulation of unesterified cholesterol, the retention of which may be aided by sphingomyelin and phosphatidylcholine content of the lysosomes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007180800941
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  • 4
    Electronic Resource
    Electronic Resource
    The influence of monovalent cations on the stability of electrochemically formed nickel fluoride films (1999)
    Springer
    Journal of solid state electrochemistry 3 (1999), S. 239-244 
    Details
    ISSN: 1433-0768
    Keywords: Key words NiF2 layer ; Nickel dissolution ; Monovalent fluorides
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The stability of electrochemically formed NiF2 film in 1.0 M perchloric acid containing monovalent fluorides namely, NH4F, HF, NaF, KF and LiF, is investigated using cyclic voltammetry, chronoamperometry, atomic absorption spectroscopy and scanning electron microscopy. In addition to direct dissolution of nickel and dissolution through the oxide layer, a new mode of dissolution of NiF2 film as NiF3 − and NiF4 2− through complex formation is proposed. This process is significantly influenced by the alkali metal fluorides. On a comparative basis the stability of NiF2 decreases in the order NH4F 〉 HF 〉 KF 〉 LiF.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100080050153
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  • 5
    Electronic Resource
    Electronic Resource
    An expert system for design for robotic assembly (1990)
    Springer
    Journal of intelligent manufacturing 1 (1990), S. 17-29 
    Details
    ISSN: 1572-8145
    Keywords: Robotic assembly ; expert systems
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract In recent years, due to the various advantages associated with automation and robotics, much work has been done in developing robotic systems for assembly operations. Since part design plays a major role in assembly, this paper deals with the design of parts for ease of robotic assembly. Considerable knowledge is available in the form of design for robotic assembly rules. In addition, a large amount of data is required for decisions regarding suitability of parts for robotic assembly. The implementation of design for robotic assembly rules would be much easier with the help of an expert system, which would guide the designer toward choosing the design alternative that can best facilitate ease of assembly from a robotic point of view. To this end, a prototype expert system for design for robotic assembly is developed and presented in this paper. The expert system was implemented as a production system, which consists of rules and Object-Attribute-Value (O-A-V) triplets to represent domain knowledge. In order to best utilize the domain specific knowledge, a state space search-based inference mechanism was employed. The implementation of the prototype system is illustrated with examples.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01471339
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  • 6
    Electronic Resource
    Electronic Resource
    Improved cycle life performance of Zn/NiOOH cells using a stabilized zinc electrode (1992)
    Springer
    Journal of applied electrochemistry 22 (1992), S. 182-184 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01023822
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  • 7
    Electronic Resource
    Electronic Resource
    Crystal and molecular structure of bis(o-phenylenethiourea)selenium(II)chloride dihydrate, C14H12N4S2Cl2Se·2H2O (1989)
    Springer
    Journal of chemical crystallography 19 (1989), S. 465-473 
    Details
    ISSN: 1572-8854
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The synthesis and crystal structure ofbis(o-phenylenethiourea)selenium(II)-chloride dihydrate, Se(C7H6N2S)2Cl2·2H2O are reported. The compound crystallizes in the monoclinic space group, P21/n, with four molecules per unit cell, the dimensions of which area=10.243(3),b=13.341(4),c=14.273(4) Å,β=93.00(3)°,U=1947.76 Å3. The structure was solved by direct methods and refined by full-matrix least-squares toR=0.039 andR w =0.040 for 3314 unique reflections. Selenium displays two strong coordinations arising from the two sulfurs, Se-S(1)=2.191(1), Se-S(2)=2.206(1) Å, and S(1)-Se-S(2)=101.0(1)°, and four secondary interactions involving three chlorines and one sulfur. The complex occurs as a dimer with two sets of very weakly interacting bridging pairs S(2), S(2)a; and Cl(2), Cl(2)a, where “a” denotes the inversion related atom. Lattice stabilization is ensured by the extensive network of hydrogen bonds involving chlorines, water oxygens, and nitrogens of phenylenethiourea ligands.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01185383
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  • 8
    Electronic Resource
    Electronic Resource
    A novel mixed valence iodide bridged Te(II)-Te(IV) complex featuring diisopropyldithiocarbamate(L) and iodide: ILTeII(I)TeIVL2I (1989)
    Springer
    Journal of chemical crystallography 19 (1989), S. 745-753 
    Details
    ISSN: 1572-8854
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The title compound is a novel mixed ligand and mixed valence complex of tellurium, the crystal structure of which is reported here. The compound crystallizes in the orthorhombic space group, Pca21 with four molecules per unit cell, the dimensions of which area=15.209(1),b=20.159(2),c=12.453(1) Å. The structure was solved by the heavy-atom method and refined by fullmatrix least-squares method to a finalR=0.046 andR w=0.046 for 3011 unique reflections. The structure could be considered as 1∶1 adduct of TeIVL2I2 and TeIILI (L=diisopropyldithiocarbamate). The two tellurium atoms, TeII[Te(1)] and TeIV[Te(2)] display entirely different coordinations and are bridged through iodine I(1) in a symmetrical manner. There is a short Te(1)⋯Te(2) contact distance of 3.542(1) Å.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01179847
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  • 9
    Electronic Resource
    Electronic Resource
    Nucleation and growth kinetics of reaction-product formation for copper–titanium and silver–titanium alloys on alumina (1997)
    Springer
    Journal of materials science 32 (1997), S. 5215-5223 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A nucleation and growth mechanism is proposed for the formation of the reaction product at the interface between polycrystalline alumina and liquid-metal alloy drops containing titanium. The reaction product had been previously identified to be an oxide of titanium. The growth of reaction product islands was clearly observed at the alumina–metal interface using optical microscopy after dissolving the metal droplets with acid. The fractional coverage was quantified as a function of time and, by assuming Avrami-type reaction kinetics, surface reaction rate constants, k, were calculated for copper–titanium and silver–titanium alloys on alumina. Reaction rate constants between 1.4×10-4 and 18×10-4 s-2 were obtained for copper–titanium alloys on alumina. The k values for silver–titanium alloys were found to be an order of magnitude lower (2.5×10-6 and 7.2×10-6 s-2) then the k values obtained for copper–titanium alloys on alumina.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018642122517
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  • 10
    Electronic Resource
    Electronic Resource
    Generation of isothermal spreading data and interfacial energy data for liquid reactive metals on ceramic substrates: The copper-titanium/alumina system (1995)
    Springer
    Journal of materials science 30 (1995), S. 3791-3798 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The sessile drop technique is frequently used to evaluate the wettability and spreadability of liquid metals on ceramic substrates. In this study, the spreading kinetics of copper-20 wt% titanium alloys on polycrystalline alumina were evaluated based on measurements of spreading radius versus time. The process of spreading was monitored by anin situ video recording system. The tests were performed using three different initial metal configurations. It was found that conventional sessile drop testing configurations cannot be used to generate isothermal spreading kinetics data because of significant spreading during the heat-up cycle from the solidus temperature to the test temperature. An improved sessile drop technique was developed which eliminated the non-isothermal experience by introducing the liquid copper to the solid titanium/alumina at the desired testing temperature. Using this technique, only a few seconds of data were lost (while the liquid copper dissolved the solid titanium). Because very limited interfacial energy data exist for the copper-titanium/alumina system, especially at higher titanium concentrations, the equilibrium contact angle, the solid-liquid interfacial energy, and the work of adhesion from 1000 to 1300 °C are also presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01153936
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