scholarly journals Temperature-dependent IR spectroscopic and structural study of 18-crown-6 chelating ligand in the complexation with sodium surfactant salts and potassium picrate

Author(s):  
Tea Mihelj ◽  
Vlasta Tomašić ◽  
Nikola Biliškov ◽  
Feng Liu
2010 ◽  
Vol 636 (1) ◽  
pp. 94-99 ◽  
Author(s):  
Grigori V. Vajenine ◽  
Constantin Hoch ◽  
Robert E. Dinnebier ◽  
Anatoliy Senyshyn ◽  
Rainer Niewa

2004 ◽  
Vol 16 (44) ◽  
pp. S5091-S5102 ◽  
Author(s):  
E S Bo in ◽  
V Petkov ◽  
P W Barnes ◽  
P M Woodward ◽  
T Vogt ◽  
...  

2008 ◽  
Vol 181 (3) ◽  
pp. 423-431 ◽  
Author(s):  
Martin Fisch ◽  
Thomas Armbruster ◽  
Boris Kolesov

Author(s):  
T.E. Pratt ◽  
R.W. Vook

(111) oriented thin monocrystalline Ni films have been prepared by vacuum evaporation and examined by transmission electron microscopy and electron diffraction. In high vacuum, at room temperature, a layer of NaCl was first evaporated onto a freshly air-cleaved muscovite substrate clamped to a copper block with attached heater and thermocouple. Then, at various substrate temperatures, with other parameters held within a narrow range, Ni was evaporated from a tungsten filament. It had been shown previously that similar procedures would yield monocrystalline films of CU, Ag, and Au.For the films examined with respect to temperature dependent effects, typical deposition parameters were: Ni film thickness, 500-800 A; Ni deposition rate, 10 A/sec.; residual pressure, 10-6 torr; NaCl film thickness, 250 A; and NaCl deposition rate, 10 A/sec. Some additional evaporations involved higher deposition rates and lower film thicknesses.Monocrystalline films were obtained with substrate temperatures above 500° C. Below 450° C, the films were polycrystalline with a strong (111) preferred orientation.


Author(s):  
James R. Gaylor ◽  
Fredda Schafer ◽  
Robert E. Nordquist

Several theories on the origin of the melanosome exist. These include the Golgi origin theory, in which a tyrosinase-rich protein is "packaged" by the Golgi apparatus, thus forming the early form of the melanosome. A second theory postulates a mitochondrial origin of melanosomes. Its author contends that the melanosome is a modified mitochondria which acquires melanin during its development. A third theory states that a pre-melanosome is formed in the smooth or rough endoplasmic reticulum. Protein aggregation is suggested by one author as a possible source of the melanosome. This fourth theory postulates that the melanosome originates when the protein products of several genetic loci aggregate in the cytoplasm of the melanocyte. It is this protein matrix on which the melanin is deposited. It was with these theories in mind that this project was undertaken.


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