Water treatment facilities strive to provide potable drinking water to the community which they service. The most common way of insuring drinkable water that is free of pathogens is water chlorination, but this can lead to the production of...
Human exposure to mercury has been shown to cause a number of adverse health outcomes, predominantly neurological effects. The developing fetus is most susceptible, and even low levels of exposure have been shown to produce nervous system deficits....
Freshwater zooplankton; Global warming; Nitrogen--Environmental aspects
Aquatic ecosystems face major transformations as humans increasingly alter their environment by introducing exotic species and changing the temperature regime and nutrient availability of freshwater systems. The impacts of such alterations of...
General. – The Characaeae is the only extant family of an ancient and unique group of nonvascular aquatic plants which are classified as a separate division, the Charophyta (Groves and Bullock-Webster, 1920; Zaneveld, 1940; Imahori, 1954; Bold,...
This dissertation explores the physical and biological factors that control zooplankton population growth rates in the Ohio River (USA). I employed both observational studies and a mesocosm experiment to ascertain zooplankton population and...
Na,K-ATPase is essential for the regulation of cytoplasmic Na+ and K+ levels in lens cells. Insufficient Na,K-ATPase activity is associated with cataract formation. Based on earlier studies in which Src-tyrosine kinase inhibitors were found to...
This study explores four economic development theories – classical location theory, human capital theory, agglomeration economies theory and creative cities theory, and their effectiveness in explaining the spatial distribution of high tech...
Indians of North America--British Columbia; Literacy--British Columbia--Case studies
This dissertation examines the literacy practices of a group of First Nations women who live in British Columbia and whose jobs entail the production and dissemination of texts which reflect the local, Carrier, culture. In this qualitative study of...
Postal service--History; Postal service--Southwest, Old
In every civilization of which any record has been preserved, there is known to have been some organized plan for maintaining communication by couriers who were either post runners or riders mounted. The relaying of these couriers was an obvious...
Edge of grassy area in front of a fence with a cluster of buildings and trees behind, followed by a body of water, with small hills on the other shore. A man stands on the grass in front of the fence, and a woman sits next to him. Title: No. 660....
Freshwater mussels--Ecology; Freshwater mussels--Blue River (Ind.)
This study assessed life history components for the elephantear freshwater mussel, Elliptio crassidens (Lamarck, 1819). The main focus of this study was to determine the suitability of various fish species as a host for E. crassidens and to...
Mathematics--Computer-assisted instruction; Mathematics--Study and teaching; Special education--Mathematics
The purpose of this study was to examine the effects of different instructional
types used in a mathematics intervention setting. In recent years, school staff have
implemented mathematics intervention programs to aid struggling students and...
Swimmers and boaters, Lake Louisvilla, Oldham County, Kentucky. Men and women in bathing suits swim, paddle two rowboats and a canoe, dive, and sit or stand on a tower and pier in Lake Louisvilla. On the shore, men and women in white clothes stand...
Long row of freight cars filled with coal curving back along the railroad tracks. More tracks and another train are to the left. Industrial equipment is in the background. Title: 6705 - A Trainload of Coal - Fresh from Pittsburgh Fields for Lake...
Ten algal isolates were obtained from soil into axenic culture and placed into defined media containing from 0 to 50 ppm of DDT, 2, 4-D,2,4,5-T, rotenone, or malathion (in two purities, 95 and 99%). For nine of the isolates, growth was measured...
Aerial view of Lake Louisvilla, Oldham County, Kentucky. Aerial view of a u-shaped section of the lake. The lake is edged by trees above and flat land with only a few trees below. Narrow roads are visible above and below. Lake Louisvilla opened as...
Small area of a lake visible with snow-capped mountains behind it and rocky terrain around it. Title: 2734. Upper Chicago Lake. Descriptive information on back of card: Clear Creek Canon, Georgetown and Vicinity Colo. The Colo. Central Div. of the...
Channel modification has played a vital part in shaping the rivers and streams as
they are seen today. Channel modifications range from the construction of dams and levees
for flood control purposes to channelization of an existing meandering...
Railroad stations; Railroads; Union Station (Chicago, Ill.); Buildings; Bridges
Overhead view of Union Station in Chicago and the Chicago River. Two buildings are in the background with rows of train platforms in front. To the left is the Chicago River with a boat and barges visible. In the foreground is a bridge crossing the...
Haute tension (Motion picture); Homosexuality in motion pictures; Horror films; Violence in motion pictures; Motion pictures--Social aspects
The film High Tension (2005) is a complex and powerfully threatening portrait of queer monstrosity and negativity. Upon its release, the film's twist ending garnered widespread derision, but there is a mad method, so to speak, in its insistence on...
