Xem 1-20 trên 27 kết quả Major nutrients
  • This book is about what we consider the essentials of human nutrition. The science of human nutrition deals with all the effects on people of any component found in food. This starts with the physiological and biochemical processes involved in nourishment—how substances in food provide energy or are converted into body tissues, and the diseases that result from insufficiency or excess of essential nutrients (malnutrition). The role of food components in the development of chronic degenerative disease like coronary heart disease, cancers, dental caries, etc.

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  • 7 Sulfur Sulfur (S) is unique in having changed within just a few years, from being viewed as an undesired pollutant to being seen as a major nutrient limiting plant production in Western Europe. In East Asia, where, under current legislative restrictions

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  • This book provides a wealth of new information, ideas and analysis on some of the key unknowns in hurricane research.

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  • These replacement and/or supplementary supplies can be provided through organic manures and/or mineral fertilizers. This publication concerns the provision of raw mate- rials for two important mineral fertilizers, phosphate and potash. Three major nutrients are required in large quantities for plant growth, nitrogen, phosphorous and potassi- um. Three secondary nutrients are required in smaller quantities on some soils; sulfur, calcium and magne- sium. Seven micronutrients may be required in small amounts where deficient.

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  • At best, it is a source of strength, beauty, and wonder. We can compare the healthy body to a well-designed machine whose parts work smoothly together. We can also compare it to a symphony orchestra in which each instrument has a different part to play. When all of the musicians play together, they produce beautiful music. From a purely physical standpoint, our bodies are made mainly of water.We are also made of many minerals, including calcium, phosphorous, potassium, sulfur, sodium, chlorine, magnesium, and iron.

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  • Lê Văn Luận, Trần Văn Minh Trường Đại học Nông Lâm Huế, 102 Phùng Hưng Huế. Tóm tắt sắn (Mahinot esculenta Crantz) var. KM94 ngày càng phổ biến tại Việt Nam. Tuy nhiên, không có hoặc ít hơn tình hình cung cấp dinh dưỡng cũng đã xảy ra.

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  • Put the right word in blanks in sentences from number 1 to number 20: explant, initiate, in vitro, non-dividing, differentiated, quiescent, nutrient, achive, differentiation, meristematic, redifferentiation...

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  • Despite the tremendous progress that has been achieved in water pollution, almost 40% of the U.S. waters that have been assessed by states do not meet water quality goals. About 20,000 water bodies are impacted by siltation, nutrients, bacteria, oxygen depletion substances, metals, habitat alterations, pesticides, and toxic organic chemicals. With pollution from point sources being dramatically reduced, nonpoint source pollution is the major cause of most water that does not meet water quality goals.

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  • No evidence of a difference in content of nutrients and other substances between organically and conventionally produced crops and livestock products was detected for the majority of nutrients assessed in this review suggesting that organically and conventionally produced crops and livestock products are broadly comparable in their nutrient content.

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  • Sewage sludge as an uncalled for product of wastewater treatment poses the challenge to society of disposing of it, but at the same time gives us the opportunity of beneficial use by closing the cycle of nutrients: sludge derived from agricultural activity must return to soil if a sustainable and ecologically sound management of these materials is desirable (SEQUI et al. 2000). At present the major ways of disposing of sewage sludges are deposition, landfill and incineration, only part of the sludges are used in agriculture. ...

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  • Among these taxa, bacteria are very important because they play a crucial role in most biogeochemical cycles in marine ecosystems (Fenchel, 1988), taking part in the decomposition of organic matter and the cycling of nutrients. Bacteria are also an important source of food for a variety of marine organisms (Das et al., 2006), and their activity has a major impact on ecosystem metabolism and function.

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  • The food we eat has a major effect on our physical health and psychological wellbeing. An understanding of the way in which nutrients are metabolized, and hence of the principles of biochemistry, is essential for an understanding of the scientific basis of what we would call a prudent or healthy diet. My aim in the following pages is to explain both the conclusions of the many expert committees that have deliberated on the problems of nutritional requirements, diet and health over the years and also the scientific basis on which these experts have reached their conclusions.

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  • The dynamics of nutrient degradation in the reticulorumen and of nutrient digestion in the intestines are major determinants of the utilization of diet ingredients by ruminants. These dynamics of nutrient digestion should be known and controlled to improve ruminal and total tract digestibility and to optimize production and composition of milk and meat....

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  • Harrison's Internal Medicine Part 4. Nutrition Chapter 73. Enteral and Parenteral Nutrition Therapy Enteral and Parenteral Nutrition Therapy: Introduction The ability to provide specialized nutritional support (SNS) represents a major advance in medical therapy.

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  • Large herbivores are, and have for a long time been, among the major drivers for forming the shape and function of terrestrial ecosystems. These animals may modify primary production, nutrient cycles, soil properties, fire regimes as well as other biota. Some large herbivore species/populations are at the edge of extinction and great effort is being made to save them. Other species/populations are under discussion for reintroduction. Still other species occur in dense populations and cause conflicts with other land use interests.

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  • Physiologic Factors Growth, strenuous physical activity, pregnancy, and lactation increase needs for energy and several essential nutrients, including water. Energy needs rise during pregnancy, due to the demands of fetal growth, and during lactation, because of the increased energy required for milk production. Energy needs decrease with loss of lean body mass, the major determinant of REE. Because both health and physical activity tend to decline with age, energy needs in older persons, especially those over 70, tend to be less than those of younger persons.

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  • The ability to provide specialized nutritional support (SNS) represents a major advance in medical therapy. Nutritional support, via either enteral or parenteral routes, is used in two main settings: (1) to provide adequate nutritional intake during the recuperative phase of illness or injury, when the patient's ability to ingest or absorb nutrients is impaired, and (2) to support the patient during the systemic response to inflammation, injury, or infection during an extended critical illness. SNS is also used in patients with permanent loss of intestinal length or function.

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  • Each basic food group5 is the major contributor of at least one nutrient while making substantial contributions of many other nutrients. Because each food group provides  a wide array of nutrients in substantial amounts, it is important to include all food groups in the daily diet. Both illustrative eating patterns include a variety of nutrien dense foods within the major food groups.

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  • With increasing recognition of the environmental impact of food and drink, future food policy and dietary advice need to go beyond the traditional focus on nutrient recommendations for health to include wider issues of sustainability. The task should not be underestimated, not least because the issue of sustainability is complex with multiple dimensions, including environmental, economic and social aspects. Current dietary advice is based on nutrient recommendations for health.

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  • Both human activities and natural activities can change the physical, chemical, and biological characteristics of water, and will have specific ramifications for human and ecosystem health. Water quality is affected by changes in nutrients, sedimentation, temperature, pH, heavy metals, non-metallic toxins, persistent organics and pesticides, and biological factors, among many other factors (Carr and Neary 2008). Following are brief discussions of these major contaminants.

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