Now showing items 1-10 of 54
Boron-modified polysilylcarbodi-imides as precursors for Si–B–C–N ceramics: Synthesis, plastic-forming and high-temperature behavior
(John Wiley & Sons, Ltd., 1998-10)
The synthesis, by two different reaction pathways, of boron-modified polysilylcarbodi-imides of general type {B[C 2 H 4 Si(R)NCN] 3 } n (R 14=singly bonded organic ligand) and the plastic-forming and the thermal behavior ...
Pyrolytic conversion of precursors prepared in Ti(NMe 2 ) 4 –diamine systems
(John Wiley & Sons, Ltd., 1998-10)
Precursors possessing Ti–N bonds were prepared by the reactions between Ti(NMe 2 ) 4 and each of three diamines H 2 NCH 2 CH 2 NH 2 , Me(H)NCH 2 CH 2 N(H)Me, HN(CH 2 CH 2 ) 2 NH (Ti(NMe 2 ) 4 :diamine 14= 141:2), and were ...
The -ills of Educational Reform
(Springer-Verlag; Springer-Verlag New York, Inc., 1998-02)
Many instructors have sincerely accepted problem solving and critical thinking as instructional objectives. This kind of language, especially notions of the liberal-arts values of taking college classes, is used in compelling ...
Mechanism and pharmacological specificity of dUTPase-mediated protection from DNA damage and cytotoxicity in human tumor cells
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 1998-09)
Purpose : We have reported previously that the expression of E. coli dUTPase (dutE) can protect HT29 cells from 5-fluorodeoxyuridine (FdUrd)-induced DNA fragmentation and cytotoxicity. In the study reported here, we further ...
Low-temperature MOCVD of chromium carbonitride coatings from tetrakis(diethylamido)chromium and pyrolysis mechanism of this single-source precursor
(John Wiley & Sons, Ltd., 1998-03)
Amorphous chromium carbonitride coatings with a low nitrogen content (3–8 at%) were deposited by low-pressure MOCVD in the temperature range 573–793 K using Cr(NEt 2 ) 4 as single-source precursor. This poor nitrogen ...
Report On ‘The MATCH Program: Integrating Student Learning in Science and Math’
(Springer-Verlag; Springer-Verlag New York, Inc., 1998-02)
The inability to integrate mathematics and chemistry continues to plague science and math undergraduates. General chemistry students often lack the ability to apply the mathematics they already know to problems given in ...
MOCVD of rhodium, palladium and platinum complexes on fluidized divided substrates: Novel process for one-step preparation of noble-metal catalysts
(John Wiley & Sons, Ltd., 1998-03)
A new one-step method, entitled fluidized-bed metal-organic chemical vapor deposition (FBMOCVD) of preparing highly dispersed metal-supported catalysts is reported. The following complexes were studied and used as CVD ...
Chemical permeabilization and in situ removal of daidzein from biologically viable soybean (Glycine max) seeds
(Kluwer Academic Publishers; Chapman and Hall ; Springer Science+Business Media, 1998-09)
After 24 h of chemical permeabilization with 20% (v/v) methanol at 25 °C, the amount of daidzein released from soybean seeds is 15 to 20% of the amount (0.0423 ± 0.0045 mg/g seed dry wt) obtained by physical grinding. With ...
Editorial: Day 2-to-40. Proceedings from a Chemical Education Workshop Symposium
(Springer-Verlag; Springer-Verlag New York, Inc., 1998-02)
This issue of The Chemical Educator is devoted to the Proceedings from a workshop symposium that I organized for the weekend of May 10–11, 1997. The two-day event was held in the Willard H. Dow Chemical Sciences laboratory ...
Second-generation polymeric precursors for BN and SiNCB ceramic materials
(John Wiley & Sons, Ltd., 1998-10)
Our recent work directed at the design, synthesis, characterization and applications of new types of polyborazylene and polyborosilazane polymers is reviewed with a focus on the use of these polymers as processable precursors ...