Our objectives were to determine 1) the concentration of prostaglandin
F2α (PGF2α) in whole and extended bovine semen, 2) if concentrations of
prostaglandins in extended bovine semen are correlated to fertility, and 3) if PGF2α
administered at the time of artificial insemination would improve conception rate.
Concentration of PGF2α tended...
High temperature microchannel heat recuperators (HTμRs) offer an efficient means of improving reactor process thermal efficiency by offering smaller form factors due to increased heat transfer surface area density and volumetric heat transfer rate over traditional heat exchanger designs. To date, HTμRs face cost and reliability challenges. In this work,...
Stepan Petrovich Krasheninnikov (1711 – 1755) was a successful early Russian naturalist whose professional and social destinies were linked to eighteenth-century Russia's nascent but growing naturalist tradition. During his own time Krasheninnikov bridged the gap that existed in Russia between a distinctly European scientific practice and a tradition of Russian...
Summertime carbon, nitrogen, and biogenic silica export was examined using ²³⁴Th:²³⁸U disequilibria combined with free floating sediment traps and fine scale water column sampling with in situ pumps (ISP) within the Eastern Tropical North Pacific and the Gulf of California. Fine scale ISP sampling provides evidence that in this system,...
Full Text:
, Pere Masqué1,3,4, Elisabet Verdeny1,
Angelicque E. White5, Brian N. Popp6, Fredrick G. Prahl5, and
The transport response of four marine psychrophilic bacteria
to a variety of substrates was determined and related to environmental
conditions. Studies on pressure and temperature effects on glutamic
acid transport and utilization indicated that high pressures and
low temperatures inhibit glutamate transport, while permitting glutamate
respiration. Similar results were obtained...
Intimate associations with reactive metal species permanently protect soil organic matter (SOM) from microbial access and oxidation, contributing to the build-up of organic carbon (C) stocks in soils. It is increasingly recognized, however, that such associations can be reversible and that reactive metal species might even facilitate the oxidation of...
It is the purpose of this thesis to present a course of study in
general "Power Mechanics" which would enable the junior high school student
to understand the elementary principles of power generation and distribution,
and to appreciate the relationships of the use of power to our social order.
The...
The investigations were based on a complete diallel cross
among three inbred lines of Hereford cattle. Records of Angus calves
born during the same period were used to obtain more accurate
estimates of environmental effects and to determine breed differences
among the various traits included in the study. Estimates of...