Collection problem

Antistatic polystyrenes have been developed in terms of additives or coatings to minimise primarily dust collecting problems in storage (see Antistatic agents). Large Hsts of commercial antistatic additives have been pubhshed (41). For styrene-based polymers, alkyl and/or aryl amines, amides, quaternary ammonium compounds, anionics, etc, are all used. 

The prototype DSCs used liquid electrolytes, typically L/I2 in an organic solvent such as propylene carbonate. The electron generation/collection problem in this cell has been discussed analytically with the help of intensity-modulated photocurrent and photovoltage spectroscopy [314]. A particularly challenging issue has been the replacement of the liquid electrolyte with a solid charge-transport material... 

Our initial interest was in studying the disposition of phenol red in the shark. This turned out to be a good choice because nearly equal amounts of the model compound appeared in the urine and bile. After solving the body fluid collecting problems, we studied in greater depth, the transport properties of phenol red in both the renal and hepatic systems. 

Zeldovich Ya. B., Shlyapintokh V. Ya.—Dokl. AN SSSR 65, 871-879 (1949). Later this subject was studied by G. G. Chernyi, R.+I. Nigmatulin and their colleagues (see Abstracts of the 5th Congress on Mechanics, AlmarAta, Nauka, 1981 and also the collection Problems of Gas Dynamics and Mechanics of a Continuous Medium . Moscow Nauka (1969), and references to previous work). 

In an effort to carry the success of 29 forward from homogeneous solution [77] to films, the team at Miami has turned to 31 [78], While 31 forms excellent monolayer films at the air-water interface, decent anthracenic fluorescence signatures are not produced until the films are diluted substantially with stearic acid and deposited onto hydrophobic glass. As may be anticipated, neat films of 31 only show broad excimeric emissions. Light collection problems dog the experiments on the films on water. No sensitivity of the emission towards pH is found, so experiments with saxitoxin are not reported at this stage. We note the closely related PET system 32 which shows good sensing of membrane-bounded protons in micellar media [79],... 

Neumann, E.P. and Norton, J.L., "Application of Sonic Energy to Commercial Aerosol Collection Problems", Chemical Engineering Symposium Series No. 1, Vol. 47, 4 -10 (1951). 

Dlocik et al. [72] have taken a general approach to the generation collection problem which considers voltage dependent rate constants for electron extraction/injection at the TiO substrate interface. The diffusion controlled limit is obtained by making the rate constant for electron extraction sufficiently large. For illumination from the electrolyte side, the ac photocurrent conversion efficiency d>([Pg.271]

Measurements of the temperature dependent current-voltage (J-V) characteristics of p a-SiC H/n c-Si heterojunction solar cells with different doping levels in the p a-SiC H layer have been made, and it is reported that as long as the p a-SiC H layer in these heterojunction cells is highly doped, collection problems do not occur under normal operating conditions. In some related work by the same authors, a study has been reported of the current-voltage... 

The synchrotron should not be seen as a replacement for facilities in the home laboratory but as a means for meeting technically challenging data collection problems. Of course, in the absence of any home X-ray facilities, the central facility can be used but this is not terribly efficient because of the necessity of long-term scheduling of many users. Hence, characterisation of samples (e.g. of heavy atom derivatives) should be done at home unless the project is entirely reliant on the SR source in this category are many virus studies and ribosome crystallography as well as small crystal projects. 

Hair is simple to collect and analyze, but arsenic levels in hair do not respond rapidly to exposure. Blood both is difficult to collect and does not give a consistent or rapid enough response to As exposure of an organism. Thus, even with the attendant collection problems, urine is the most practical index to the exposure of forest workers to the organic arsenical herbicides. Unfortunately, the pharmacokinetics of these herbicides have not been fully developed for dermal exposure, and there are indications that urine is not the sole excretory route. Thus, estimates of exposure based only on As excretion in urine may be only 30% of actual exposure levels (2 8). 

Returning to the carrier collection problem, consider Fig. 18 for an n-semiconductor-electrolyte interface. As can be seen, the electron-hole pairs are optically generated, both in the field-free and in the space charge regions within the semiconductor. Recombination of these... 

Mikitaev, A. K. Korshak, V. V Musaev, Yu. I. Storozhuk, I. P. Correlation analysis of poly condensation reaction of disodium salts of bisphenols with 4,4 -dichlo-rodiphenylsulfone. In collection Problems of Physics-chemistry of Polymers. Ed. Mikitaev, A. Zelenev, Yu. Nal chik, KBSU, 1972,29-38. 

P. A. Rebinder and I. N. Vlodavets, in collection Problems in Physicochemical Mechanics of Fibrous and Porous Materials, Izd. Zinatne, Riga (USSR) (1967), p. 5. 

Chieh-San Chao, in collection Problems in Engineering Geology and Soil Science,... 

Human behaviour is far more complex than component behaviour and can fail in many different ways in different circumstances. The data collection problem is therefore enormous. 

V. A. Kargin and T. I. Sogolova, Collection Problems of Physico-chemistry. No. 1, Moscow, State Press for Chemical Literature, 1958, p. 18. 

---