Excitation time

The later time evolution is shown in Figrne A3.13.7 between 90 and 100 fs, and m Figrne A3.13.8, between 390 and 400 fs, after the beginning of the excitation (time step t j)- Tln-ee observations are readily made first,... 

These are exciting times for peptide based materials. The number of investigators in this field and consequently the number of publications in this area have increased tremendously in recent years. Not since the middle of the past century has there been so much activity focused on the physical properties of peptidic materials. Then, efforts were focused on determination of the fundamental elements that make up protein structures, leading to the discoveries of the a—helix and the (3-sheet. Many years of study followed where the propensities of individual and combinations of amino acids to adopt and stabilize these structures were investigated. Now, this knowledge is being applied to the preparation, assembly, and use of peptide based materials with designed sequences. This volume summarizes recent developments in all these areas. 

Maenosono, S., Dushkin, C. D., Saita, S. and Yamaguchi, Y. (2000) Optical memory media based on excitation-time dependent luminescence from a thin film of semiconductor nanocrystals. Jpn. J. Appl. Phys., 39, 4006- 12. 

When an electric current is passed through a fusehead, the sequence of events shown in Fig. 10.6 occurs. After a time known as the excitation time, the fusehead ignites and this may or may not cause rupture of the bridgewire. The time it takes for the bridgeware to be broken is known as the lag time and this may equal the excitation time, or be as long as the... 

A Minimum lag time 6 Minimum excitation time C Maximum excitation time X Minimum firing current for single detonator V Minimum series tiring current Fig. 10.7. Series firing of electric detonators. 

The curves of Fig. 10.7 apply only to fuseheads made to the same specification. If fuseheads are made with different bridgewires or different flashing dips, the corresponding curves could be completely different and there may be no point at which the minimum lag time of one type of detonator exceeds the maximum excitation time of the other. Under these conditions series firing would not be practicable and it follows that it is not feasible to use different types of detonators in a single series firing circuit. 

Excitation time. In firing electric detonators, the interval between the application of the current and the firing of the fusehead (see p. 112). 

These are exciting times for molecular biology, now that the beginnings of a molecular account of development seem within reach. From this point of view, the role of research on DNA was similar to the role of the collection of facts of natural history in the formulation of the theory of evolution, an important stage but, ultimately, of little theoretical significance. The interesting structures and the interactions that make them possible all occur at the protein level. The cell co-opts for its use whatever resources it has available in its inherited DNA (and other units of inheritance). 

James E. Peebles, professor emeritus at Princeton (2001), offers his own description. He states that at present the house of cosmological theories resembles scaffolding which is solidly assembled but still has large gaps. The open questions are those of dark matter , inflation and quintessence . We live in exciting times for cosmology. ... 

Observations The apparatus allows the adjustment of excitation time to 4 sec or longer. Also, photon flux density of 200gmol m2 s 1 can be elevated to 400 or 600 gmol m 2 s, which depends on plant species or measuring conditions. 

These are exciting times for industrial chemists and engineers their language, exemplified by the new names in this dictionary, reflects this. 

The cross-metathesis reaction has evolved extensively during the past few years, but there is still a considerable amount of work to be done before the full potential of this reaction is realised. The development of new metathesis catalysts, greater understanding and control of selectivity, and more extensive applications in synthesis that will surely follow in the near future, make this a particularly exciting time in the evolution of the alkene cross-metathesis reaction. 

It is certainly an exciting time to be a scientist involved in new drug discovery. As pharmaceutical companies continue to look for ways to efficiently screen thousands of compounds each year through various in vitro and in vivo ADME/PK screens, they face continuing pressures to obtain data more efficiently at a faster pace. The ongoing advances in the fields of HPLC and MS are helping scientists meet these demands. 

E. Reichstein, Y. Shami, M. Ramjeesingh, and E. P. Diamandis, Laser-excited time-resolved solid-phase fluoroimmunoassays with the new europium chelate 4,7-bis(chlorosulfophenyl)-l,10-phenanthroline-2,9-dicarboxylic acid as label, Anal. Chem. 60, 1069-1074 (1988). 

The past 50 years has seen intense research activity in wood modification research, and this will continne. Over the past decade, we have seen the first tentative steps towards the development of an entirely new indnstry. The next decade will see the maturing of this indnstry, with a large increase in the nnmber of products available. This is a very exciting time for all of those involved in this area. This book reports upon the situation as of the beginning of 2005. In 10 years time, it may be necessary to devote an entire book solely to commercial aspects of wood modification. 

The past few years have been an exciting time for modeling gas-surface reactions. Computational techniques as well as potential energy functions have become sufficiently advanced that dynamics simulations can now described many realistic situations without introducing severe approximations. As computer resources continue to grow, the impact which computer modeling has on science and enginwring will also continue to increase. 

For firing successfully a series of detonators it is required that the shortest Tag time" of any of them must exceed the longest "excitation time "of any of them. In other words, every one of the detonators must receive the full quota of electric energy to cause its ignition before any single one of them has completed its "lag time"... 

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