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Railway ballast consists of crushed aggregate and serves as foundation and drainage for railway tracks. Over time, ballast loses its geotechnical properties and cannot be reused within the rail industry but can be sold on to other users to be utilized as a ...
The fluctuating behavior of a Sulzer Metco F4 de plasma gun has been investigated by simultaneous measurement of the:time dependencies of the are voltage and of images from the nozzle interior. An end-on imaging arrangement using a mirror and a mask in the ...
A review. Only the most important methods for the generation of organometallic reagents and intermediates are covered in this review. This holds for the reductive insertion of Li into org. halides, the permutational interconversion of org. halides with org ...
BACKGROUND AND OBJECTIVE: In bladder cancer, conventional white light endoscopic examination of the bladder does not provide adequate information about the presence of "flat" urothelial lesions such as carcinoma in situ. In the present investigation, we ex ...
An excellent knowledge of histopathological risk factors of superficial bladder transitional cell carcinoma is mandatory to establish the prognosis of the disease. Presence or absence of carcinoma in situ (CIS) in superficial bladder cancer is one of the m ...
Mask-aligner lithography is traditionally performed using mercury arc lamps with wavelengths ranging from 250 nm to 600 nm with intensity peaks at the i, g and h lines. Since mercury arc lamps present several disadvantages, it is of interest to replace the ...
The syn-anti ratio of 7-(R-substituted)-norcaranes (I, R = Ph. F, Cl) formed in the cycloaddn. of cyclohexene (II) with PhCH2F, PhCH2Cl, PhCHBrF, PhCHBr2, FCHBr2, ClCHBr2, or CH2Cl and BuLi in various solvents under N was examd. with respect to influences ...
