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Description
Filled with simple yet time-tested, instructive experiments, this program, five very visual segments of ten minutes each, illustrates how four important laboratory and industrial chemicals are made and used: hydrochloric acid, sodium hydroxide, ammonia water, and limewater. A fifth segment demonstrates how to dye litmus paper and employ it to test for acidity and alkalinity.
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Description
New textbooks at all levels of chemistry appear with great regularity. Some fields like basic biochemistry, organic reaction mechanisms, and chemical ther modynamics are well represented by many excellent texts, and new or revised editions are published sufficiently often to keep up with progress in research. However, some areas of chemistry, especially many of those taught at the grad uate level, suffer from a real lack of up-to-date textbooks....
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Description
Where were the amino acids, the molecules of life, created: perhaps in a lightning storm in the early Earth, or perhaps elsewhere in the cosmos? This book argues that at least some of them must have been produced in the cosmos, and that the fact that the Earthly amino acids have a specific handedness provides an important clue for that explanation. The book discusses several models that purport to explain the handedness, ultimately proposing a new...
Description
This program familiarizes students with the features of acids and bases, and discusses their physical and chemical properties. The pH scale is introduced with examples of strong and weak acids and bases and the concept of neutral substances is explored. The use of indicators to test the pH of acids and bases is explained, as well as showing the variety of indicators available and their specific uses. Students are shown how to make their own red cabbage...
Description
Keep focusing on the four major classes of biological molecules--carbohydrates, lipids, proteins, and nucleic acids. This short exercise will help you sharpen your skills and build your knowledge. It includes 15 questions, plus detailed answer explanations that break down the key concepts.
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Description
Nutritional ergogenic aids are defined as dietary components that are ingested in order to enhance or improve exercise and/or sports performance. Presents findings on nonnutritional ergogenic aids and available information on nutritional ergogenic aids. Discusses banned foodstuffs and pharmacological substances, macronutrients, vitamins, metabolic intermediates, minerals, amino acids, dietary substances not required in human metabolism, etc.
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Investigative journalist Nina Teicholz argues here that everything we thought we knew about dietary fat is wrong. She documents how the low-fat nutrition advice of the past sixty years has amounted to a vast uncontrolled experiment on the entire population, with disastrous consequences for our health. For decades, we have been told that the best possible diet involves cutting back on fat, especially saturated fat, and that if we are not getting healthier...
Description
The team return, getting behind the hype and headlines to tackle the health issues that matter. Does burning calories through exercise leave you hungrier than not eating those calories in the first place? Michael Mosley investigates. Gabriel Weston looks at how 3D printing is transforming surgery, and meets a patient who's had a replacement sternum made with this amazing technology. Chris van Tulleken asks whether we should get our omega-3 from fresh...
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