Range and Optimum Growth Concentrations of Phosphate and Nitrate for Chlamydomonas reinhardtii

A study was conducted on the alga Chlamydomonas reinhardtii to determine the range and optimum growth concentrations of phosphate and nitrate. There are only a few species of algae for which this type of data is known. Inorganic nutritional data is basic to the understanding of the complexities of phytoplankton ecology and eutrophication. The plus strain of this heterothallic alga was cultured in a TRIS-buffered inorganic medium with various concentrations of sodium phosphate and potassium nitrate and adjusted to a pH of 7.4. The axenic cultures were evaluated at the end of 6 days with a spectrophotometer, at a wavelength of 645 millimicrons. An environmental chamber adjusted to 12 hours day/night length and illumination of 1,400 footcandles at 22°C was employed in the study. The phosphate range of growth was 0.07 to 3,200 ppm PO4 with optimum growth from 3 to 950 ppm PO4. The nitrate range of growth was 2 to 9,700 ppm NO3 with optimum growth from 33 to 5,000 ppm NO3. These data confirm earlier work which indicated that this organism is very tolerant of organic pollution. This alga has high nutrient requirements for survival and optimum growth compared to other algae

The Importance of Moral Rules and Principles

This is the text of The Lindley Lecture for 2006, given by Thomas E. Hill, Jr., an American philosopher

Hill\u27s Manual of Social Business Forms: Guide to Correct Writing (Part Two)

This is part two of the Hill\u27s Manual of Social Business Forms: Guide to Correct Writing -- With Approved Methods in Speaking and Acting in the various Relations of Life. This book is split into numerous sections that encompass subjects varying from letter writing to the governing of the United States. The sections of the second part of this manual include: Miscellaneous Forms, Important Facts and Tables for Reference, A Glance at Astronomy, Modern and Late Styles of Fashionable Carriages and Sleighs in General Use, List of Modern Abbreviations, The Battles of the Late Civil War, List of Modern Abbreviations, How the United States are Governed: Duties and Privileges of Persons in Official Positions, Celebrations and Festivals, Toasts and Sentiments, Speeches for Various Occasions, Facial Expression and Gesture, Pen and Pencil Flourishing, Engravers\u27 Inscriptions, Tomb-Stone Inscriptions, Selections for Epitaphs, Poetry, Vocabulary of Rhymes, Choice Selections from the Poets, and Commendations from Distinguished Educators and Eminent Men.https://openworks.wooster.edu/motherhomeheaven/1002/thumbnail.jp

Kant on Virtue and the Virtues

Immanuel Kant is known for his ideas about duty and morally worthy acts, but his conception of virtue is less familiar. Nevertheless Kant’s understanding of virtue is quite distinctive and has considerable merit compared to the most familiar conceptions. Kant also took moral education seriously, writing extensively on both the duty of adults to cultivate virtue and the empirical conditions to prepare children for this life-long responsibility. Our aim is, first, to explain Kant’s conception of virtue, second, to highlight some distinctive and potentially appealing features of the Kantian account of virtue, third, to summarize and explain Kant’s prescriptions for educating young children and youth as well as the duty of moral self-improvement that he attributes to all adults, and, fourth, to respond to some common objections that we regard as misguided or insubstantial

Lewis icing research tunnel test of the aerodynamic effects of aircraft ground deicing/anti-icing fluids

A wind tunnel investigation of the effect of aircraft ground deicing/anti-icing fluids on the aerodynamic characteristics of a Boeing 737-200ADV airplane was conducted. The test was carried out in the NASA Lewis Icing Research Tunnel. Fluids tested include a Newtonian deicing fluid, three non-Newtonian anti-icing fluids commercially available during or before 1988, and eight new experimental non-Newtonian fluids developed by four fluid manufacturers. The results show that fluids remain on the wind after liftoff and cause a measurable lift loss and drag increase. These effects are dependent on the high-lift configuration and on the temperature. For a configuration with a high-lift leading-edge device, the fluid effect is largest at the maximum lift condition. The fluid aerodynamic effects are related to the magnitude of the fluid surface roughness, particularly in the first 30 percent chord. The experimental fluids show a significant reduction in aerodynamic effects

Analysis of moisture content and heat damage of wheat using physical techniques

Call number: LD2668 .T4 1969 H525Master of Scienc

An Assessment of Benthic Sediments and an Inventory of Sewer Outfalls and Land Use for Selected Chicago Areas Streams

published or submitted for publicationis peer reviewedOpe