91 Ergebnisse - Zeige 1 von 20.

No reliable acute-exposure1 standards have been established for the particular purpose of protecting soldiers from toxic exposures to chemical warfare (CW) agents. Some human-toxicity estimates are available for the most common CW agents?organophosphorus nerve agents and vesicants, however, most of those estimates were developed for offensive purposes (that is, to kill or incapacitate the enemy) and were intended to be interim values only. Bec...

Keine Beschreibung.

Keine Beschreibung.

Why are students today not learning biology, appreciating its importance in their lives, or pursuing it as a career? Experts believe dismal learning experiences in biology classes are causing the vast majority of students to miss information that could help them lead healthier lives and make more intelligent decisions as adults. How can we improve the teaching of biology throughout the school curriculum? Fulfilling the Promise offers a vision ...

This book assesses the strengths and weaknesses of current environmental research programs, describes the desirable characteristics of an effective program, and recommends cultural and organizational changes to improve the performance of environmental research. Research areas in need of greater emphasis are identified, and overall directions for environmental research are recommended. The book also comments on the proposal to establish a Natio...

This book responds to a congressional request to evaluated criteria by which land is acquired under the Land and Water Conservation Fund. The committee reviews criteria and procedures by which four agencies acquire lands for conservation, examines the historic, public policy, and scientific bases of criteria and compares them with nongovernmental organizations, and assesses the effectiveness of the agencies in preserving natural resources whil...

Written at the request of the U.S. Air Force and Congress, this book evaluates the potential health effects associated with deployment of the Ground Wave Emergency Network (GWEN), a communications system to be used in case of a high-altitude detonation of a nuclear device. The committee, composed of experts in biophysics, physics, risk assessment, epidemiology, and cancer, examines data from laboratory and epidemiologic studies of effects from...

The scientific basis, inference assumptions, regulatory uses, and research needs in risk assessment are considered in this two-part volume. The first part, Use of Maximum Tolerated Dose in Animal Bioassays for Carcinogenicity, focuses on whether the maximum tolerated dose should continue to be used in carcinogenesis bioassays. The committee considers several options for modifying current bioassay procedures. The second part, Two-Stage Models o...

The ability of the United States to sustain a dominant global position in biotechnology lies in maintaining its primacy in basic life-science research and developing a strong resource base for bioprocess engineering and bioproduct manufacturing. This book examines the status of bioprocessing and biotechnology in the United States, current bioprocess technology, products, and opportunities, and challenges of the future and what must be done to ...

Use of the term "multiple chemical sensitivity" (MCS) as a diagnostic label has generated increasing controversy during the past few decades as a phenomenon related to exposure to chemical agents sustained both in indoor and outdoor environments. This volume, prepared in conjunction with Biologic Markers in Immunotoxicology, contains the authored papers of a workshop held to develop an agenda to study the phenomenon of multiple chemical sensit...

Faster progress in plant biology research could benefit agriculture, the environment, medicine, and our understanding of basic biological processes. This book clearly and directly describes the impediments to greater achievements in plant science and suggests solutions. It presents an innovative plan that would create a comprehensive federal system of management and financial support for plant biology research and training.

Studies of underground miners have provided a wealth of data about the risk of lung cancer from exposure to radon's progeny elements, but the application of the miner data to the home environment is not straightforward. In Comparative Dosimetry of Radon in Mines and Homes, an expert committee uses a new dosimetric model to extrapolate to the home environment the risk relationships found in the miner studies. Important new scaling factors are d...

The National Human Monitoring Program (NHMP) identifies concentrations of specific chemicals in human tissues, including toxicologic testing and risk assessment determinations. This volume evaluates the current activities of the NHMP, identifies important scientific, technical, and programmatic issues, and makes recommendations regarding the design of the program and use of its products.

Most people in the United States spend far more time indoors than outdoors. Yet, many air pollution regulations and risk assessments focus on outdoor air. These often overlook contact with harmful contaminants that may be at their most dangerous concentrations indoors. A new book from the National Research Council explores the need for strategies to address indoor and outdoor exposures and examines the methods and tools available for finding o...

Forests are valuable in our daily lives, crucial to our nation's ecomony, and integral to the long-term health of the environment. Yet, forestry research has been critically underfunded, and the data generated under current research programs is not enough to meet the diverse needs of our society. Forestry Research provides a research agenda that should yield the information we need to develop responsible policies for forest use and management....

Keine Beschreibung.

Keine Beschreibung.

In response to a congressional mandate, this book examines whether knowing the amounts of toxic substances entering and leaving manufacturing facilities is useful in evaluating chemical releases to the environment, waste reduction progress, and chemical management practices. Tracking of these substances with rigorous engineering data is compared with a less resource-intensive alternative to determine the feasibility and potential usefulness to...

Potential benefits from the use of genetically modified organisms?such as bacteria that biodegrade environmental pollutants?are enormous. To minimize the risks of releasing such organisms into the environment, regulators are working to develop rational safeguards. This volume provides a comprehensive examination of the issues surrounding testing these organisms in the laboratory or the field and a practical framework for making decisions about...

Biology is where many of science's most exciting and relevant advances are taking place. Yet, many students leave school without having learned basic biology principles, and few are excited enough to continue in the sciences. Why is biology education failing? How can reform be accomplished? This book presents information and expert views from curriculum developers, teachers, and others, offering suggestions about major issues in biology educat...