The infrared absorption spectra (40-800 cm⁻¹) of the trifluorides
of Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Tb, Ho, Er, Tm, and Yb isolated
in solid argon, krypton and nitrogen matrices have been obtained. For
PrF₃ the symmetric and asymmetric stretching modes were observed;
PrF₃ is accordingly assigned a...
John Wesley Powell worked actively for public land system
reform while a director of geographical and geological surveys in
the West from 1869 to 1894. Although this has won him acclaim as a
conservationist, the basis of Powell's linkage of reform with
scientific work is poorly understood.
A study of...
It is desirable to be able to describe an automobile mathematically
because of the large number of variables which affect automobiles'
handling characteristics and of the high cost of building prototypes.
A mathematical analysis facilitates the construction of a
few prototypes whose configurations look most promising.
Equations of motion were...
The purpose of this work was to design a system for measuring
the velocity of a powder actuated fastener or drivepin during penetration.
This system would provide a tool for further investigation
into drivepin penetration characteristics. The main characteristic
of interest is the instantaneous acceleration from which the forces
on...
Agricultural economists have devoted considerable attention to
the financial stress situation of agricultural producers. Many
studies have been conducted in various regions of the U.S. in an
attempt to better understand the causes of the problem. The costs
associated with farm financial stress imply corresponding benefits to
be realized by...
The major objectives of this study were: (1) to determine the extent to which southwest Oregon populations of Douglas-fir [Pseudotsuga menziesii var menziesii (Mirb.) Franco) differ in quantitative genetic structure (QGS); (2) to determine whether differences in QGS are associated with the environments from which populations originate; and (3) to...
Caenorhabditis elegans is arguably the best understood animal on the planet.
Used for over 50 years to study development, we have a vast amount of knowledge of
the inner workings of this worm. Our knowledge is incomplete, however, without
placing this organism in its evolutionary and ecological context. In this...
:
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Dee R. Denver
Caenorhabditis elegans is arguably the best understood animal on the planet
Pseudomonas is a diverse, ubiquitous, and widely studied genus of bacteria. As Pseudomonas species occupy a wide range of niches in the ecosystem, they have made remarkable biological impacts. Better understanding of Pseudomonas biology, genetic diversity, and functional interactions with other organisms and the environment will provide valuable insights into...
A quality problem that frequently occurs with frozen green beans
is the sloughing of the skin (epidermal tissues) of the cooked, ready-to-
serve bean pods. It was found that by giving the beans a pre-blanch
(relatively mild heat treatment) prior to the blanch treatment normally
used for frozen green beans,...