Download or read book Inorganic Plant Poisons and Stimulants Classic Reprint written by Winifred E. Brenchley and published by Forgotten Books. This book was released on 2017-10-12 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Inorganic Plant Poisons and Stimulants Ever since the physiological side Of botany began to emerge from obscurity, the question Of the relation between the nutrition and the growth of the plant has occupied a foremost position. All kinds of theories, both probable and improbable, have been held as to the way in which plants obtain the various components of their foods. But quite early in the history of the subject it was acknowledged that the soil was the source Of the mineral constituents of the plant food, and that the roots were the organs by which they were received into the plant. A new chapter in the history of science was begun when Liebig in 1840 first discussed the importance of inorganic or mineral substances in plant nutrition. This discussion led to a vast amount of work dealing with the problem of nutrition from many points of view, and the general result has been the sorting out of the elements into three groups, nutritive, indifferent, and toxic. Thus calcium, phosphorus, nitrogen and potassium are classed as nutritive, arsenic, copper and boron as toxic, and many others are regarded as indifferent. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Download or read book The New International Encyclopaedia written by and published by . This book was released on 1923 with total page 882 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The New International Encyclop dia written by Frank Moore Colby and published by . This book was released on 1917 with total page 886 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book New International Encyclopedia written by and published by . This book was released on 1916 with total page 888 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Inorganic Plant Poisons and Stimulants written by Winifred E. Brenchley and published by . This book was released on 2017-08-31 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Inorganic Plant Poisons and Stimulants written by Winifred Elsie Brenchley and published by Createspace Independent Publishing Platform. This book was released on 1914 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the last century great and widespread changes have been made in agricultural practice-changes largely associated with the increase in the use of artificial fertilisers as supplements to the bulky organic manures which had hitherto been used. The value of certain chemical compounds as artificial manures is fully recognised, yet many attempts are being made to prove the value of other substances for the same purpose, with a view to increase in efficiency and decrease in cost. The interest in the matter is naturally great, and agriculturists, botanists and chemists have all approached the question from their different standpoints. In the following pages an attempt is made to correlate the work that has been done on a few inorganic substances which gave promise of proving useful in agricultural practice. Much of the evidence put forward by different workers is conflicting, and it is clear that no definite conclusions can yet be reached. Nevertheless, examination of the evidence justifies the hope that results of practical value will yet be obtained, and it is hoped that the analysis and coordination of the available data put forward in this book will aid in clearing the ground for those investigators who are following up the problem from both the academic and the practical standpoints.
Download or read book The English Catalogue of Books annual written by Sampson Low and published by . This book was released on 1915 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. for 1898-1968 include a directory of publishers.
Download or read book Pharmako Poeia written by Dale Pendell and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Pharmako poeia: plant powers, poisons, and herbcraft focuses on familiar psychoactive plant-derived substances and related synthetics, ranging from the licit (tobacco, alcohol) to the illicit (cannabis, opium) and the exotic (absinthe, salvia divinorum, nitrous oxide)"--Provided by publisher.
Download or read book Waste Incineration and Public Health written by National Research Council and published by National Academies Press. This book was released on 2000-10-21 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Incineration has been used widely for waste disposal, including household, hazardous, and medical wasteâ€"but there is increasing public concern over the benefits of combusting the waste versus the health risk from pollutants emitted during combustion. Waste Incineration and Public Health informs the emerging debate with the most up-to-date information available on incineration, pollution, and human healthâ€"along with expert conclusions and recommendations for further research and improvement of such areas as risk communication. The committee provides details on: Processes involved in incineration and how contaminants are released. Environmental dynamics of contaminants and routes of human exposure. Tools and approaches for assessing possible human health effects. Scientific concerns pertinent to future regulatory actions. The book also examines some of the social, psychological, and economic factors that affect the communities where incineration takes place and addresses the problem of uncertainty and variation in predicting the health effects of incineration processes.
Download or read book The Use of Drugs in Food Animals written by National Research Council and published by National Academies Press. This book was released on 1999-01-12 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of drugs in food animal production has resulted in benefits throughout the food industry; however, their use has also raised public health safety concerns. The Use of Drugs in Food Animals provides an overview of why and how drugs are used in the major food-producing animal industriesâ€"poultry, dairy, beef, swine, and aquaculture. The volume discusses the prevalence of human pathogens in foods of animal origin. It also addresses the transfer of resistance in animal microbes to human pathogens and the resulting risk of human disease. The committee offers analysis and insight into these areas: Monitoring of drug residues. The book provides a brief overview of how the FDA and USDA monitor drug residues in foods of animal origin and describes quality assurance programs initiated by the poultry, dairy, beef, and swine industries. Antibiotic resistance. The committee reports what is known about this controversial problem and its potential effect on human health. The volume also looks at how drug use may be minimized with new approaches in genetics, nutrition, and animal management.
Download or read book British Books written by and published by . This book was released on 1919 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Inorganic Plant Poisons and Stimulants written by Winifred Elsie Brenchley and published by Theclassics.Us. This book was released on 2013-09 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 edition. Excerpt: ... CHAPTER VIII CONCLUSIONS In the foregoing chapters a very limited number of plant poisons have been considered, yet there is sufficient evidence to show that even these few differ considerably in their action upon plant-life. This action is most variable, and it is impossible to foretell the effect of any substance upon vegetative growth without experiments. The degree of toxicity of the different poisons is not the same, and also one and the same poison varies in the intensity and nature of its action on different species of plants. While certain compounds of copper, zinc and arsenic are exceedingly poisonous, compounds of manganese and boron are far less deleterious, so that a plant can withstand the presence of far more of the latter substances than of the former. Again, the tested compounds of copper, zinc and arsenic do not seem to stimulate growth, even when they are applied in the smallest quantities, whereas very dilute solutions of manganese and boron compounds decidedly increase growth. But, differentiation occurs even in this stimulative action, for while manganese is the more effective in stimulating barley, boric acid is far more potent for peas, the shoots being particularly improved. A consideration of the experimental work that has been done on this subject of poisoning and stimulation leads one to the inevitable conclusion that it is not true to maintain the hypothesis that all inorganic plant poisons act as stimulants when they are present in very small quantities, for while some poisons do increase plant growth under such conditions, others fail to do so in any circumstances. It is probable that what has been found true with the few substances tested would prove to be similarly true over a much wider range of poisons, ..
Download or read book Bookseller and the Stationery Trades Journal written by and published by . This book was released on 1915 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Strengthening Forensic Science in the United States written by National Research Council and published by National Academies Press. This book was released on 2009-07-29 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scores of talented and dedicated people serve the forensic science community, performing vitally important work. However, they are often constrained by lack of adequate resources, sound policies, and national support. It is clear that change and advancements, both systematic and scientific, are needed in a number of forensic science disciplines to ensure the reliability of work, establish enforceable standards, and promote best practices with consistent application. Strengthening Forensic Science in the United States: A Path Forward provides a detailed plan for addressing these needs and suggests the creation of a new government entity, the National Institute of Forensic Science, to establish and enforce standards within the forensic science community. The benefits of improving and regulating the forensic science disciplines are clear: assisting law enforcement officials, enhancing homeland security, and reducing the risk of wrongful conviction and exoneration. Strengthening Forensic Science in the United States gives a full account of what is needed to advance the forensic science disciplines, including upgrading of systems and organizational structures, better training, widespread adoption of uniform and enforceable best practices, and mandatory certification and accreditation programs. While this book provides an essential call-to-action for congress and policy makers, it also serves as a vital tool for law enforcement agencies, criminal prosecutors and attorneys, and forensic science educators.
Download or read book Oxford Handbook of Emergency Medicine written by Jonathan P. Wyatt and published by OUP Oxford. This book was released on 2012-02-16 with total page 745 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fully revised and updated, the Oxford Handbook of Emergency Medicine is the definitive, best-selling guide for all of the common conditions that present to the emergency department. Whether you work in emergency medicine, or just want to be prepared, this book will be your essential guide. Following the latest clinical guidelines and evidence, written and reviewed by experts, this handbook will ensure you are up to date and have the confidence to deal with all emergency presentations, practices, and procedures. In line with the latest developments in the field, such as infection control, DNR orders, advanced directives and learning disability, the book also includes new sections specifically outlining patient advice and information, as well as new and revised vital information on paediatrics and psychiatry. For all junior doctors, specialist nurses, paramedics, clinical students, GPs and other allied health professionals, this rapid-reference handbook will become a vital companion for both study and practice.
Download or read book The Publisher written by and published by . This book was released on 1919 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Bookseller written by and published by . This book was released on 1915 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt:
