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Studies on vitamin B12 biosynthesis and on 2,3-Oxidosqualene cyclase
(1994)
Vitamin B 12, the antipemicious anemia factor, is known to be the most complex nonpolymeric natural product derived from uroporphyrinogen III. Its coenzyme is the tetrapyrrolic cofactor involved in over 20 enzymatic ...
Technological continuity and change : a study of cultural adaptation in pram-class boatbuilding in the Netherlands
(1994)
This study traces the development of an ancient class of Northern European watercraft, called pram. The term pram-class is used herein to refer to a broad range of flat-bottom, hard-chine work boats and freighters. The ...
The multi-oscillatory circadian system in the house sparrow, Passer domesticus
(1994)
The avian circadian system is regulated by four circadian components: the pineal gland, the suprachiasmatic nuclei (SCN) of the hypothalamus, the retinae and deep brain extraocular photoreceptors (EOP). The interactions ...
Studies on algal histones and histone-like proteins in dinoflagellates
(1994)
In the search for the origin of the five histone types which occur in similar form in both higher plants and animals, we studied the chromosomal proteins of primitive eukaryotic organisms. Chromatin spreads made from ...
Physiological evaluation of the role of aspartate transcarbamoylase in the pyrimidine pathway
(1994)
Aspartate transcarbamoylase catalyses the first uniquely committed step of the de novo pyrimidine biosynthesis in Escherichia coli, the condensation of carbamoyl phosphate with aspartate. The genetic expression of the ...
A beam-column method for tieback walls
(1994)
A beam-column method for tieback walls or anchored walls was developed and tested. An instrumented full scale tieback wall in sand was constructed at the National Geotechnical Experimentation Site located on the Texas A&M ...
Domestic and international joint venture and licensing decisions : effects of location, insider ownership, and firm size
(1994)
Joint venture and licensing agreements have emerged as popular substitutes for more traditional means of inter-corporate contracting such as mergers, acquisitions, and asset purchases. A feature which sets these two forms ...
Selective formation of isobutane and isobutene from synthesis gas over zirconia catalysts
(1994)
Isosynthesis is a process to synthesize isobutane and isobutene from hydrogenation of carbon monoxide. Certain metal oxides such as Z r02 and T h02 are active isosynthesis catalysts. Previous work in the literature concludes ...
Computed tomography of macrostructure and physical property variability of seafloor sediments
(1994)
X-ray computed tomography (CT), with concurrent conventional x-radiographic and high-resolution physical property analyses, revealed distinct environmental differences in sediment macrostructure (millimeter-to-centimeter ...
Wavelet thresholding in nonparametric regression with change-point applications
(1994)
Two research areas that have generated a great deal of interest in the field of statistics are the change-point problem and nonparametric regression. This work is concerned with a melding of these two general ideas. In ...