The building blocks of coral reefs are the skeletons of generations of reef-building algae, corals, and other organisms that are composed of calcium carbonate. For example, as a coral head grows, it lays down a skeletal structure encasing each new polyp. Waves, grazing fishes (such as parrotfish), sea urchins, sponges, and other forces and organisms break down the coral skeletons into fragments that settle into spaces in the reef structure. Many other organisms living in the reef community contribute their skeletal calcium carbonate in the s ...

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Coral reef, Coral reef - Coral Reef Biology, Coral reef - Coral Reef Formations, Coral reef - World-wide distribution of reefs, Coral reef - Ecology and biodiversity, Coral reef - Threats to Reefs, Coral reef - Land development and pollution, Coral reef - Live reef fish trade, Coral reef - Coral bleaching, Coral reef - Destruction worldwide, Coral reef - Protection and restoration of reefs, Coral reef - Marine Protected Areas

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Due to rising awareness of chemicals and other contaminants in the food supply, people are looking for more wholesome and safer alternatives. Fortunately, hydroponics is the exact fit for the consumer’s new requirements. Some commercial installations use no pesticides or herbicides, preferring Integrated Pest Management Techniques. There is often a price premium willingly paid by consumers for produce which is labeled "Organic". This means that lawyers and lobbyists are paid to establish rules and laws determining exactly who can ch ...

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Hydroponics, Hydroponics - Uses, Hydroponics - History, Hydroponics - Techniques, Hydroponics - Passive hydroponics, Hydroponics - Flood and Drain or Ebb and Flow, Hydroponics - Deep Water Culture DWC, Hydroponics - Drip feeding, Hydroponics - Wick feeding, Hydroponics - Raft cultivation, Hydroponics - Nutrient film technique NFT, Hydroponics - Aeroponics, Hydroponics - Media, Hydroponics - Expanded Clay, Hydroponics - Rockwool, Hydroponics - Coco Coir, Hydroponics - Perlite, Hydroponics - Vermiculite, Hydroponics - Oasis Root Cubes, Hydroponics - Nutrient Solutions, Hydroponics - Commercial, Hydroponics - Problems with hydroponics, Hydroponics - Present and future

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Vitamin C - Plant sources. Citrus fruits (lime, lemon, orange, grapefruit), tomatoes, and potatoes are good common sources of vitamin C. Other foods that are good sources of vitamin C include papaya, broccoli, brussels sprouts, black currants, strawberries, cauliflower, spinach, cantaloupe, and kiwifruit. Also, cranberries and red peppers are good sources of the vitamin. The amount of vitamin C in foods of plant origin depends on: the precise variety of the plant, the soil conditionSee also:

Vitamin C, Vitamin C - Discovery and history, Vitamin C - Sources of vitamin C, Vitamin C - Plant sources, Vitamin C - Animal sources, Vitamin C - Artificial chemical synthesis, Vitamin C - Functions in the body, Vitamin C - Vitamin C deficiency, Vitamin C - Daily requirement, Vitamin C - The Recommended Daily Allowance, Vitamin C - Advocacy amounts, Vitamin C - Food preparation, Vitamin C - Therapeutic uses, Vitamin C - Advocacy arguments, Vitamin C - Known harmful effects, Vitamin C - Other reports of harmful effects, Vitamin C - Sources

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Initiatives have begun to encourage a resurgence of breastfeeding mothers. As a result of the International Code of Marketing of Breast-milk Substitutes, infant formula companies are now required to preface their product information with statements that breastfeeding is the best way of feeding babies and that a substitute should only be used after consultation with health professionals. Infant formula remains a safe and convenient infant feeding option. The baby bottle has become a very visible part of Western culture, and increasingl ...

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Infant formula, Infant formula - Nutrient content, Infant formula - Variations, Infant formula - History, Infant formula - Controversy and Science, Infant formula - Recent trends, Infant formula - Manufacturers

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In more recent years the use of infant formula, in undeveloped countries, has come under scrutiny. Some feel that infant formula use may aggravate several infant conditions including insulin dependent diabetes mellitus[1], middle ear infections, and several bacterial infections[2]. The association of infant formula and allergies is still extremely controversial[3] and an association with lower cognitive development has also been studied, althoug ...

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Infant formula, Infant formula - Nutrient content, Infant formula - Variations, Infant formula - History, Infant formula - Controversy and Science, Infant formula - Recent trends, Infant formula - Manufacturers

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Due to its reactivity to air and many other oxygen containing substances, phosphorus is not found free in nature but it is widely distributed in many different minerals. Phosphate rock, which is partially made of apatite (an impure tri-calcium phosphate mineral) is an important commercial source of this element. Large deposits of apatite are in Russia, Morocco, Florida, Idaho, Tennessee, Utah, and elsewhere. There are however concerns over how long these phosphorus deposits will last. USA will deplete their deposits around 2035. China and Mo ...

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Phosphorus, Phosphorus - Notable characteristics, Phosphorus - Forms, Phosphorus - Applications, Phosphorus - Biological role, Phosphorus - Occurrence, Phosphorus - Precautions, Phosphorus - Isotopes, Phosphorus - Spelling, Phosphorus - Compounds

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Lack of ascorbic acid in the daily diet leads to a disease called scurvy, a form of avitaminosis that is characterized by: loose teeth superficial bleeding fragility of blood vessels poor healing compromised immunity mild anemia It is eventually fatal, and was a common condition among sailors and during winter. Scurvy is now very rare in industrialized countries. It should not be confused with "subclinical scurvy" or "chronic scurvy", both high-dose advocate terms for the normal human condition of bl ...

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Vitamin C, Vitamin C - Discovery and history, Vitamin C - Sources of vitamin C, Vitamin C - Plant sources, Vitamin C - Animal sources, Vitamin C - Artificial chemical synthesis, Vitamin C - Functions in the body, Vitamin C - Vitamin C deficiency, Vitamin C - Daily requirement, Vitamin C - The Recommended Daily Allowance, Vitamin C - Advocacy amounts, Vitamin C - Food preparation, Vitamin C - Therapeutic uses, Vitamin C - Advocacy arguments, Vitamin C - Known harmful effects, Vitamin C - Other reports of harmful effects, Vitamin C - Sources

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There is a continuing debate within the scientific community over the optimum amount of vitamin C for humans.[1] Vitamin C - The Recommended Daily Allowance. A healthy person on a balanced diet should be able to get the vitamin C needed to prevent the symptoms of scurvy from their daily diet without supplementation. People who smoke, those under stress, and pre ...

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Vitamin C, Vitamin C - Discovery and history, Vitamin C - Sources of vitamin C, Vitamin C - Plant sources, Vitamin C - Animal sources, Vitamin C - Artificial chemical synthesis, Vitamin C - Functions in the body, Vitamin C - Vitamin C deficiency, Vitamin C - Daily requirement, Vitamin C - The Recommended Daily Allowance, Vitamin C - Advocacy amounts, Vitamin C - Food preparation, Vitamin C - Therapeutic uses, Vitamin C - Advocacy arguments, Vitamin C - Known harmful effects, Vitamin C - Other reports of harmful effects, Vitamin C - Sources

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Since its discovery Vitamin C has been considered a universal panacea by some, although this led to suspicions of it being overhyped by others. It should be noted that many medical hypotheses proposed by scientists and researchers remain speculations and have yet to be proven by science. The fact that man possesses three of the four enzymes that animals employ to manufacture ascorbates in relatively large amounts, has led researchers such as Irwin Stone and Linus Pauling to hypothesize that man's ancestors once manufactured this subst ...

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Vitamin C, Vitamin C - Discovery and history, Vitamin C - Sources of vitamin C, Vitamin C - Plant sources, Vitamin C - Animal sources, Vitamin C - Artificial chemical synthesis, Vitamin C - Functions in the body, Vitamin C - Vitamin C deficiency, Vitamin C - Daily requirement, Vitamin C - The Recommended Daily Allowance, Vitamin C - Advocacy amounts, Vitamin C - Food preparation, Vitamin C - Therapeutic uses, Vitamin C - Advocacy arguments, Vitamin C - Known harmful effects, Vitamin C - Other reports of harmful effects, Vitamin C - Sources

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Vitamin C is needed in the diet to prevent scurvy. From its ready availability in pure form in the 1930s however some practitioners experimented in using vitamin C as a treatment for diseases other than scurvy. Most notable was Fred R. Klenner, a doctor in general practise in Reidsville, North Carolina. He utilised both oral and intravenous vitamin C to treat a wide range of infections and poisons. He published a paper in 1949 that described how he had seen poliomyelitis y ...

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Vitamin C, Vitamin C - Discovery and history, Vitamin C - Sources of vitamin C, Vitamin C - Plant sources, Vitamin C - Animal sources, Vitamin C - Artificial chemical synthesis, Vitamin C - Functions in the body, Vitamin C - Vitamin C deficiency, Vitamin C - Daily requirement, Vitamin C - The Recommended Daily Allowance, Vitamin C - Advocacy amounts, Vitamin C - Food preparation, Vitamin C - Therapeutic uses, Vitamin C - Advocacy arguments, Vitamin C - Known harmful effects, Vitamin C - Other reports of harmful effects, Vitamin C - Sources

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It is important to choose a suitable method of food preparation that conserves vitamin C content. When cooking vegetables, one should seek to minimize temperature and duration of cooking and not discard water used in preparation, e.g. by steam cooking or by making soup. Food source vitamin C is identical to that in supplements. The structure of vitamin C is well understood, see ascorbic acid, and there is no difference i ...

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Vitamin C, Vitamin C - Discovery and history, Vitamin C - Sources of vitamin C, Vitamin C - Plant sources, Vitamin C - Animal sources, Vitamin C - Artificial chemical synthesis, Vitamin C - Functions in the body, Vitamin C - Vitamin C deficiency, Vitamin C - Daily requirement, Vitamin C - The Recommended Daily Allowance, Vitamin C - Advocacy amounts, Vitamin C - Food preparation, Vitamin C - Therapeutic uses, Vitamin C - Advocacy arguments, Vitamin C - Known harmful effects, Vitamin C - Other reports of harmful effects, Vitamin C - Sources

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Phosphorus is a key element in all known forms of life. Inorganic phosphorus in the form of the phosphate PO43- plays a major role in biological molecules such as DNA and RNA where it forms part of the structural backbone of these molecules. Living cells also utilize phosphate to transport cellular energy via adenosine triphosphate (ATP). Nearly every cellular process that uses energy gets it in the form of ATP. ATP is also important for phosphorylation, a key regulatory event in cells. Phospholipids are the main struct ...

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Phosphorus, Phosphorus - Notable characteristics, Phosphorus - Forms, Phosphorus - Applications, Phosphorus - Biological role, Phosphorus - Occurrence, Phosphorus - Precautions, Phosphorus - Isotopes, Phosphorus - Spelling, Phosphorus - Compounds

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Common phosphorus forms a waxy white solid that has a characteristic disagreeable smell similar to that of garlic. Pure forms of the element are colorless and transparent. This nonmetal is not soluble in water, but it is soluble in carbon disulfide. Pure phosphorus ignites spontaneously in air and burns to phosphorus pentoxide. Phosphorus - Forms. Phosphorus exists in three allotropic forms: white , red, and black . Other allotropic forms may exist. The most common are red and white phosphorus, both of whi ...

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Phosphorus, Phosphorus - Notable characteristics, Phosphorus - Forms, Phosphorus - Applications, Phosphorus - Biological role, Phosphorus - Occurrence, Phosphorus - Precautions, Phosphorus - Isotopes, Phosphorus - Spelling, Phosphorus - Compounds

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Although hydroponics is useful and an expanding area of agriculture, it is not without problems. On large scale commercial operations computers can be used to help control the different factors, making hydroponics more complex and thus more expensive. However, the added benefit of computer controlled growing environments is that manual intervention is kept to a minimum. There are experimental computer systems which allow every aspect of the gro ...

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Hydroponics, Hydroponics - Uses, Hydroponics - History, Hydroponics - Techniques, Hydroponics - Passive hydroponics, Hydroponics - Flood and Drain or Ebb and Flow, Hydroponics - Deep Water Culture DWC, Hydroponics - Drip feeding, Hydroponics - Wick feeding, Hydroponics - Raft cultivation, Hydroponics - Nutrient film technique NFT, Hydroponics - Aeroponics, Hydroponics - Media, Hydroponics - Expanded Clay, Hydroponics - Rockwool, Hydroponics - Coco Coir, Hydroponics - Perlite, Hydroponics - Vermiculite, Hydroponics - Oasis Root Cubes, Hydroponics - Nutrient Solutions, Hydroponics - Commercial, Hydroponics - Problems with hydroponics, Hydroponics - Present and future

Read more here: » Hydroponics: Encyclopedia II - Hydroponics - Problems with hydroponics

Signal transduction - Extracellular. Signal transduction usually involves the binding of "extracellular" signaling molecules to receptors that face outwards from the membrane and trigger events inside. This takes place via a change in the shape or conformation of the receptor which occurs when the signal molecule "docks" or binds. Receptors typically respond only to the specific molecule or "ligand" for which they have affinity, and molecules that are even only slightly differ ...

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Signal transduction, Signal transduction - Overview, Signal transduction - Stimuli, Signal transduction - Responses, Signal transduction - Types of signals, Signal transduction - Extracellular, Signal transduction - Intracellular, Signal transduction - Intercellular, Signal transduction - Hormones, Signal transduction - Types of receptors, Signal transduction - Transmembrane receptors, Signal transduction - Nuclear receptors, Signal transduction - Signal amplification, Signal transduction - Signal amplification at the transmembrane hormone receptor, Signal transduction - Intracellular signal transduction, Signal transduction - Ca²⁺ as a second messenger, Signal transduction - Lipophilic second messenger molecules, Signal transduction - Nitric oxide NO as second messenger, Signal transduction - Research questions, Signal transduction - Further information, Signal transduction - Bibliography, Signal transduction - Sources used in article or earlier version, Signal transduction - External links

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Plant nutrients are dissolved in the water used in hydroponics and are mostly in inorganic and ionic form. Primary among the dissolved cations (positively-charged ions) are Ca2+ (calcium), Mg2+ (magnesium), and K+ (potassium); the major nutrient anions in nutrient solutions are NO3- (nitrate), SO42- (sulfate), and H2PO4- (phosphate). Numerous 'recipes' for hydroponic solutions are available. Many use different combinations of ...

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Hydroponics, Hydroponics - Uses, Hydroponics - History, Hydroponics - Techniques, Hydroponics - Passive hydroponics, Hydroponics - Flood and Drain or Ebb and Flow, Hydroponics - Deep Water Culture DWC, Hydroponics - Drip feeding, Hydroponics - Wick feeding, Hydroponics - Raft cultivation, Hydroponics - Nutrient film technique NFT, Hydroponics - Aeroponics, Hydroponics - Media, Hydroponics - Expanded Clay, Hydroponics - Rockwool, Hydroponics - Coco Coir, Hydroponics - Perlite, Hydroponics - Vermiculite, Hydroponics - Oasis Root Cubes, Hydroponics - Nutrient Solutions, Hydroponics - Commercial, Hydroponics - Problems with hydroponics, Hydroponics - Present and future

Read more here: » Hydroponics: Encyclopedia II - Hydroponics - Nutrient Solutions

One of the most obvious decisions a hydroponicist has to make is which medium they should use. Different media are appropriate for different growing techniques. Hydroponics - Expanded Clay. Also known as 'hydroton'(this is a trademarked name), these small round baked spheres of clay are inert and are extremely suitable for any hydroponic system where all the nutrients are carefully controlled in the water. Clay pebbles can be reused, provided they are cleaned thoroughly in-between crops. Baked clay pebbles are highly porous, yet irregularly shaped to create an ideal bal ...

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Hydroponics, Hydroponics - Uses, Hydroponics - History, Hydroponics - Techniques, Hydroponics - Passive hydroponics, Hydroponics - Flood and Drain or Ebb and Flow, Hydroponics - Deep Water Culture DWC, Hydroponics - Drip feeding, Hydroponics - Wick feeding, Hydroponics - Raft cultivation, Hydroponics - Nutrient film technique NFT, Hydroponics - Aeroponics, Hydroponics - Media, Hydroponics - Expanded Clay, Hydroponics - Rockwool, Hydroponics - Coco Coir, Hydroponics - Perlite, Hydroponics - Vermiculite, Hydroponics - Oasis Root Cubes, Hydroponics - Nutrient Solutions, Hydroponics - Commercial, Hydroponics - Problems with hydroponics, Hydroponics - Present and future

Read more here: » Hydroponics: Encyclopedia II - Hydroponics - Media

ICD-10 Chapter E: Endocrine nutritional and metabolic diseases - E40-E46 Malnutrition. (E40) Kwashiorkor (E41) Nutritional marasmus (E42) Marasmic kwashiorkor (E43) Unspecified severe protein-energy malnutrition (E44) Protein-energy malnutrition of moderate and mild degree (E45) Retarded development following protein-energy malnutrition (E46) Unspecified protein-energy malnutrition ICD-10 Chapter E: Endocrine nutritional and ...

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ICD-10 Chapter E: Endocrine nutritional and metabolic diseases, ICD-10 Chapter E: Endocrine nutritional and metabolic diseases - E00-E35 - Endocrine diseases, ICD-10 Chapter E: Endocrine nutritional and metabolic diseases - E00-E07 Thyroid gland / Thyroid hormone, ICD-10 Chapter E: Endocrine nutritional and metabolic diseases - E10-E16 Pancreas / Insulin glucagon, ICD-10 Chapter E: Endocrine nutritional and metabolic diseases - E20-E21 Parathyroid gland / PTH, ICD-10 Chapter E: Endocrine nutritional and metabolic diseases - E22-E23 Pituitary gland / ADH oxytocin GH ACTH TSH LH FSH prolactin, ICD-10 Chapter E: Endocrine nutritional and metabolic diseases - E24-E27 Adrenal gland / Aldosterone cortisol epinephrine norepinephrine, ICD-10 Chapter E: Endocrine nutritional and metabolic diseases - E28-E30 Gonads / Estrogen androgens testosterone etc., ICD-10 Chapter E: Endocrine nutritional and metabolic diseases - E31-E35 Other, ICD-10 Chapter E: Endocrine nutritional and metabolic diseases - E40-68 - Nutritional diseases, ICD-10 Chapter E: Endocrine nutritional and metabolic diseases - E40-E46 Malnutrition, ICD-10 Chapter E: Endocrine nutritional and metabolic diseases - E50-E64 Other nutritional deficiencies, ICD-10 Chapter E: Endocrine nutritional and metabolic diseases - E65-E68 Obesity and other hyperalimentation, ICD-10 Chapter E: Endocrine nutritional and metabolic diseases - E70-E90 - Metabolic diseases, ICD-10 Chapter E: Endocrine nutritional and metabolic diseases - E70-E79 Metabolic disorders of proteins fats and carbohydrates, ICD-10 Chapter E: Endocrine nutritional and metabolic diseases - E79-E90 Other metabolic disorders

Read more here: » ICD-10 Chapter E: Endocrine nutritional and metabolic diseases: Encyclopedia II - ICD-10 Chapter E: Endocrine nutritional and metabolic diseases - E40-68 - Nutritional diseases

ICD-10 Chapter E: Endocrine nutritional and metabolic diseases - E70-E79 Metabolic disorders of proteins fats and carbohydrates. (E70) Disorders of aromatic amino-acid metabolism (E700) Classical phenylketonuria (E701) Other hyperphenylalaninaemias (E702) Disorders of tyrosine metabolism Alkaptonuria (ILDS E70.210) Ochronosis (ILDS E70.230) Tyrosinaemia (E703) Albinism (E71) Disorders of branch ...

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ICD-10 Chapter E: Endocrine nutritional and metabolic diseases, ICD-10 Chapter E: Endocrine nutritional and metabolic diseases - E00-E35 - Endocrine diseases, ICD-10 Chapter E: Endocrine nutritional and metabolic diseases - E00-E07 Thyroid gland / Thyroid hormone, ICD-10 Chapter E: Endocrine nutritional and metabolic diseases - E10-E16 Pancreas / Insulin glucagon, ICD-10 Chapter E: Endocrine nutritional and metabolic diseases - E20-E21 Parathyroid gland / PTH, ICD-10 Chapter E: Endocrine nutritional and metabolic diseases - E22-E23 Pituitary gland / ADH oxytocin GH ACTH TSH LH FSH prolactin, ICD-10 Chapter E: Endocrine nutritional and metabolic diseases - E24-E27 Adrenal gland / Aldosterone cortisol epinephrine norepinephrine, ICD-10 Chapter E: Endocrine nutritional and metabolic diseases - E28-E30 Gonads / Estrogen androgens testosterone etc., ICD-10 Chapter E: Endocrine nutritional and metabolic diseases - E31-E35 Other, ICD-10 Chapter E: Endocrine nutritional and metabolic diseases - E40-68 - Nutritional diseases, ICD-10 Chapter E: Endocrine nutritional and metabolic diseases - E40-E46 Malnutrition, ICD-10 Chapter E: Endocrine nutritional and metabolic diseases - E50-E64 Other nutritional deficiencies, ICD-10 Chapter E: Endocrine nutritional and metabolic diseases - E65-E68 Obesity and other hyperalimentation, ICD-10 Chapter E: Endocrine nutritional and metabolic diseases - E70-E90 - Metabolic diseases, ICD-10 Chapter E: Endocrine nutritional and metabolic diseases - E70-E79 Metabolic disorders of proteins fats and carbohydrates, ICD-10 Chapter E: Endocrine nutritional and metabolic diseases - E79-E90 Other metabolic disorders

Read more here: » ICD-10 Chapter E: Endocrine nutritional and metabolic diseases: Encyclopedia II - ICD-10 Chapter E: Endocrine nutritional and metabolic diseases - E70-E90 - Metabolic diseases

Because lichens are morphologically small relative to most terrestrial plants, yet require access to sunlight in order to grow, most forms are attached to either large boulders, other inert surfaces, or woody plants in somewhat to completely open or exposed situations. However, where adequate moisture exists, lichens develop on surfaces (particularly those of slow-growing trees) in forests as part of an epiphyte community. Stability (that is, longevity) of a surface is a commonality of most lichen habitats. Lichens are relatively slow-growin ...

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Lichen, Lichen - Morphology and structure, Lichen - Reproduction, Lichen - Ecology, Lichen - Growth Form

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Lichens most frequently reproduce asexually, either by vegetative reproduction or through the dispersal of diaspores containing algal and fungal cells. Soredia (sing. soredium) are small groups of algal cells surrounded by fungal filaments that form in cavities called soralia, which open when the lichen dries or surrounding tissues die and release the soredia to be dispersed by wind. Another form of diaspore are isidia, elongated outgrowths from the thallus that break off for dispersal. Fruticose lichens in particular can easily fragm ...

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Lichen, Lichen - Morphology and structure, Lichen - Reproduction, Lichen - Ecology, Lichen - Growth Form

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Liebig was expelled from his grammar school for detonating an explosive device he had made at home from chemicals obtained from his father's business. He was apprenticed to an apothecary in Heppenheim. Liebig attended the University of Bonn, studying under Karl Wilhelm Gottlob Kastner. When Kastner moved to the University of Erlangen, Liebig followed him and received his doctorate there in 1822. He then obtained a grant from the Hessian government to study in Paris. Through the influence of Alexander von Humboldt, he was able to work in the ...

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Justus von Liebig, Justus von Liebig - Biography, Justus von Liebig - Research and development, Justus von Liebig - Major works, Justus von Liebig - Notes

Read more here: » Justus von Liebig: Encyclopedia II - Justus von Liebig - Biography