What is the ratio of carbon to hydrogen in a carbohydrate

Organic compound that consists only of carbon, hydrogen, and oxygen

A carbohydrate () is a biomolecule consisting of carbon (C), hydrogen (H) and oxygen (O) atoms, usually with a hydrogen–oxygen atom ratio of two:one (as in water) and thus with the empirical formula C _m (H_twoO) _n (where chiliad may or may not be dissimilar from n). Still, not all carbohydrates accommodate to this precise stoichiometric definition (e.g., uronic acids, deoxy-sugars such every bit fucose), nor are all chemicals that do adjust to this definition automatically classified as carbohydrates (east.g. formaldehyde and acerb acrid).

The term is about common in biochemistry, where it is a synonym of sugar, a grouping that includes sugars, starch, and cellulose. The saccharides are divided into iv chemical groups: monosaccharides, disaccharides, oligosaccharides, and polysaccharides. Monosaccharides and disaccharides, the smallest (lower molecular weight) carbohydrates, are ordinarily referred to as sugars.^[1] The word saccharide comes from the Aboriginal Greek word σάκχαρον ( sákkharon ), significant "sugar".^[2] While the scientific classification of carbohydrates is circuitous, the names of the monosaccharides and disaccharides very often stop in the suffix -ose, which was originally taken from glucose, from the Ancient Greek word γλεῦκος ( gleûkos ), meaning "wine, must", and is used for almost all sugars, e.1000. fructose (fruit sugar), sucrose (cane or beet sugar), ribose, amylose, lactose (milk carbohydrate), etc.

Carbohydrates perform numerous roles in living organisms. Polysaccharides serve for the storage of free energy (e.g. starch and glycogen) and as structural components (e.thousand. cellulose in plants and chitin in arthropods). The five-carbon monosaccharide ribose is an important component of coenzymes (due east.g. ATP, FAD and NAD) and the backbone of the genetic molecule known as RNA. The related deoxyribose is a component of DNA. Saccharides and their derivatives include many other important biomolecules that play key roles in the immune organization, fertilization, preventing pathogenesis, claret clotting, and development.^[three]

Carbohydrates are central to nutrition and are institute in a wide multifariousness of natural and processed foods. Starch is a polysaccharide. Information technology is arable in cereals (wheat, maize, rice), potatoes, and processed nutrient based on cereal flour, such as staff of life, pizza or pasta. Sugars appear in human nutrition mainly as table sugar (sucrose, extracted from sugarcane or sugar beets), lactose (abundant in milk), glucose and fructose, both of which occur naturally in beloved, many fruits, and some vegetables. Table carbohydrate, milk, or beloved are ofttimes added to drinks and many prepared foods such as jam, biscuits and cakes.

Cellulose, a polysaccharide found in the cell walls of all plants, is one of the main components of insoluble dietary cobweb. Although it is not digestible in humans (ruminates generally, and some insects – notably termites, have more complex digestions and can digest cellulose), cellulose and insoluble dietary cobweb generally help maintain a healthy digestive system^[4] by facilitating bowel movements. Other polysaccharides independent in dietary cobweb include resistant starch and inulin, which feed some leaner in the microbiota of the large intestine, and are metabolized past these bacteria to yield brusk-concatenation fatty acids.^{[5] [6]}

Terminology [edit]

In scientific literature, the term "carbohydrate" has many synonyms, like "sugar" (in the broad sense), "saccharide", "ose",^[ii] "glucide",^[seven] "hydrate of carbon" or "polyhydroxy compounds with aldehyde or ketone". Some of these terms, specially "carbohydrate" and "saccharide", are likewise used with other meanings.

In food science and in many informal contexts, the term "saccharide" oft means whatever nutrient that is particularly rich in the circuitous carbohydrate starch (such as cereals, bread and pasta) or simple carbohydrates, such as sugar (constitute in candy, jams, and desserts). This informality is sometimes disruptive since it confounds chemical construction and digestibility in humans.

Often in lists of nutritional information, such equally the USDA National Nutrient Database, the term "carbohydrate" (or "carbohydrate by divergence") is used for everything other than water, poly peptide, fat, ash, and ethanol.^[8] This includes chemical compounds such as acetic or lactic acid, which are not normally considered carbohydrates. It also includes dietary fiber which is a saccharide simply which does non contribute food energy (kilocalories) in humans, even though it is oftentimes included in the calculation of total food free energy just as though it did (ie, as if information technology were a digestible and absorbable carbohydrate such as a sugar). In the strict sense, "carbohydrate" is practical for sweetness, soluble carbohydrates, many of which are used in human food.

History [edit]

This section needs expansion. Yous can assist by adding to information technology. (January 2022)

Structure [edit]

Formerly the name "sugar" was used in chemistry for whatever chemical compound with the formula C _m (H₂O) _north . Post-obit this definition, some chemists considered formaldehyde (CH₂O) to exist the simplest carbohydrate,^[nine] while others claimed that title for glycolaldehyde.^[ten] Today, the term is by and large understood in the biochemistry sense, which excludes compounds with only one or two carbons and includes many biological carbohydrates which deviate from this formula. For case, while the above representative formulas would seem to capture the usually known carbohydrates, ubiquitous and arable carbohydrates ofttimes deviate from this. For example, carbohydrates often display chemical groups such as: N-acetyl (eastward.yard. chitin), sulfate (e.k. glycosaminoglycans), carboxylic acid and deoxy modifications (east.grand. fucose and sialic acrid).

Natural saccharides are by and large congenital of simple carbohydrates called monosaccharides with general formula (CH₂O) _n where n is three or more. A typical monosaccharide has the construction H–(CHOH) _x (C=O)–(CHOH) _y –H, that is, an aldehyde or ketone with many hydroxyl groups added, usually 1 on each carbon cantlet that is not part of the aldehyde or ketone functional grouping. Examples of monosaccharides are glucose, fructose, and glyceraldehydes. Nonetheless, some biological substances unremarkably chosen "monosaccharides" do not conform to this formula (e.yard. uronic acids and deoxy-sugars such as fucose) and there are many chemicals that do conform to this formula but are not considered to be monosaccharides (e.g. formaldehyde CH₂O and inositol (CH₂O)_half-dozen).^[eleven]

The open up-concatenation class of a monosaccharide often coexists with a closed band form where the aldehyde/ketone carbonyl group carbon (C=O) and hydroxyl group (–OH) react forming a hemiacetal with a new C–O–C span.

Monosaccharides can be linked together into what are chosen polysaccharides (or oligosaccharides) in a large variety of means. Many carbohydrates comprise i or more than modified monosaccharide units that have had one or more groups replaced or removed. For example, deoxyribose, a component of DNA, is a modified version of ribose; chitin is composed of repeating units of Northward-acetyl glucosamine, a nitrogen-containing form of glucose.

Sectionalisation [edit]

Carbohydrates are polyhydroxy aldehydes, ketones, alcohols, acids, their simple derivatives and their polymers having linkages of the acetal type. They may be classified co-ordinate to their degree of polymerization, and may be divided initially into three main groups, namely sugars, oligosaccharides and polysaccharides.^[12]

The major dietary carbohydrates

Class (degree of polymerization)	Subgroup	Components
Sugars (1–2)	Monosaccharides	Glucose, galactose, fructose, xylose
	Disaccharides	Sucrose, lactose, maltose, isomaltulose, trehalose
	Polyols	Sorbitol, mannitol
Oligosaccharides (3–9)	Malto-oligosaccharides	Maltodextrins
	Other oligosaccharides	Raffinose, stachyose, fructo-oligosaccharides
Polysaccharides (>9)	Starch	Amylose, amylopectin, modified starches
	Not-starch polysaccharides	Glycogen, Cellulose, Hemicellulose, Pectins, Hydrocolloids

Monosaccharides [edit]

Monosaccharides are the simplest carbohydrates in that they cannot be hydrolyzed to smaller carbohydrates. They are aldehydes or ketones with two or more hydroxyl groups. The general chemical formula of an unmodified monosaccharide is (C•H₂O)_n, literally a "carbon hydrate". Monosaccharides are of import fuel molecules equally well as building blocks for nucleic acids. The smallest monosaccharides, for which n=three, are dihydroxyacetone and D- and L-glyceraldehydes.

Classification of monosaccharides [edit]

The α and β anomers of glucose. Note the position of the hydroxyl group (ruby-red or green) on the anomeric carbon relative to the CH₂OH group bound to carbon 5: they either accept identical accented configurations (R,R or S,S) (α), or reverse absolute configurations (R,South or S,R) (β).^[13]

Monosaccharides are classified according to three different characteristics: the placement of its carbonyl group, the number of carbon atoms it contains, and its chiral handedness. If the carbonyl grouping is an aldehyde, the monosaccharide is an aldose; if the carbonyl grouping is a ketone, the monosaccharide is a ketose. Monosaccharides with iii carbon atoms are called trioses, those with four are chosen tetroses, v are called pentoses, six are hexoses, and so on.^[14] These two systems of nomenclature are oft combined. For example, glucose is an aldohexose (a six-carbon aldehyde), ribose is an aldopentose (a 5-carbon aldehyde), and fructose is a ketohexose (a half dozen-carbon ketone).

Each carbon atom begetting a hydroxyl group (-OH), with the exception of the first and last carbons, are asymmetric, making them stereo centers with two possible configurations each (R or S). Because of this asymmetry, a number of isomers may exist for whatsoever given monosaccharide formula. Using Le Bel-van't Hoff rule, the aldohexose D-glucose, for example, has the formula (C·H₂O)_{half dozen}, of which four of its six carbons atoms are stereogenic, making D-glucose one of 2⁴=xvi possible stereoisomers. In the case of glyceraldehydes, an aldotriose, in that location is one pair of possible stereoisomers, which are enantiomers and epimers. ane, 3-dihydroxyacetone, the ketose respective to the aldose glyceraldehydes, is a symmetric molecule with no stereo centers. The assignment of D or L is fabricated according to the orientation of the disproportionate carbon furthest from the carbonyl group: in a standard Fischer projection if the hydroxyl grouping is on the correct the molecule is a D sugar, otherwise it is an L sugar. The "D-" and "L-" prefixes should not be dislocated with "d-" or "l-", which signal the direction that the saccharide rotates plane polarized calorie-free. This usage of "d-" and "50-" is no longer followed in carbohydrate chemistry.^[15]

Ring-straight chain isomerism [edit]

Glucose can exist in both a straight-chain and ring form.

The aldehyde or ketone group of a direct-chain monosaccharide will react reversibly with a hydroxyl group on a different carbon atom to form a hemiacetal or hemiketal, forming a heterocyclic band with an oxygen bridge between 2 carbon atoms. Rings with five and six atoms are called furanose and pyranose forms, respectively, and exist in equilibrium with the direct-chain form.^[xvi]

During the conversion from directly-chain form to the circadian course, the carbon atom containing the carbonyl oxygen, called the anomeric carbon, becomes a stereogenic center with two possible configurations: The oxygen atom may take a position either higher up or beneath the plane of the ring. The resulting possible pair of stereoisomers is called anomers. In the α anomer, the -OH substituent on the anomeric carbon rests on the opposite side (trans) of the ring from the CH₂OH side branch. The alternative form, in which the CH₂OH substituent and the anomeric hydroxyl are on the same side (cis) of the aeroplane of the ring, is called the β anomer.

Use in living organisms [edit]

Monosaccharides are the major fuel source for metabolism, being used both equally an energy source (glucose being the near of import in nature equally it is the product of photosynthesis in plants) and in biosynthesis. When monosaccharides are not immediately needed, they are often converted to more space-efficient (ie, less h2o soluble) forms, often polysaccharides. In many animals, including humans, this storage form is glycogen, particularly in liver and muscle cells. In plants, starch is used for the same purpose. The nearly abundant saccharide, cellulose, is a structural component of the cell wall of plants and many forms of algae. Ribose is a component of RNA. Deoxyribose is a component of DNA. Lyxose is a component of lyxoflavin found in the human heart.^[17] Ribulose and xylulose occur in the pentose phosphate pathway. Galactose, a component of milk saccharide lactose, is plant in galactolipids in plant cell membranes and in glycoproteins in many tissues. Mannose occurs in homo metabolism, especially in the glycosylation of certain proteins. Fructose, or fruit sugar, is found in many plants and humans, it is metabolized in the liver, absorbed straight into the intestines during digestion, and found in semen. Trehalose, a major sugar of insects, is rapidly hydrolyzed into ii glucose molecules to support continuous flight.

Disaccharides [edit]

Sucrose, as well known as table sugar, is a common disaccharide. It is equanimous of two monosaccharides: D-glucose (left) and D-fructose (right).

2 joined monosaccharides are called a disaccharide and these are the simplest polysaccharides. Examples include sucrose and lactose. They are composed of 2 monosaccharide units leap together by a covalent bond known as a glycosidic linkage formed via a dehydration reaction, resulting in the loss of a hydrogen atom from one monosaccharide and a hydroxyl grouping from the other. The formula of unmodified disaccharides is C₁₂H₂₂O₁₁. Although there are numerous kinds of disaccharides, a handful of disaccharides are particularly notable.

Sucrose, pictured to the right, is the most abundant disaccharide, and the main class in which carbohydrates are transported in plants. Information technology is composed of i D-glucose molecule and one D-fructose molecule. The systematic name for sucrose, O-α-D-glucopyranosyl-(1→ii)-D-fructofuranoside, indicates iv things:

• Its monosaccharides: glucose and fructose
• Their band types: glucose is a pyranose and fructose is a furanose
• How they are linked together: the oxygen on carbon number 1 (C1) of α-D-glucose is linked to the C2 of D-fructose.
• The -oside suffix indicates that the anomeric carbon of both monosaccharides participates in the glycosidic bond.

Lactose, a disaccharide equanimous of i D-galactose molecule and one D-glucose molecule, occurs naturally in mammalian milk. The systematic proper name for lactose is O-β-D-galactopyranosyl-(ane→four)-D-glucopyranose. Other notable disaccharides include maltose (two D-glucoses linked α-1,four) and cellobiose (two D-glucoses linked β-ane,iv). Disaccharides tin be classified into two types: reducing and non-reducing disaccharides. If the functional group is present in bonding with another sugar unit, information technology is chosen a reducing disaccharide or biose.

Nutrition [edit]

Grain products: rich sources of carbohydrates

Carbohydrate consumed in nutrient yields three.87 kilocalories of energy per gram for uncomplicated sugars,^[18] and 3.57 to 4.12 kilocalories per gram for complex carbohydrate in near other foods.^[nineteen] Relatively high levels of carbohydrate are associated with candy foods or refined foods fabricated from plants, including sweets, cookies and candy, tabular array sugar, dear, soft drinks, breads and crackers, jams and fruit products, pastas and breakfast cereals. Lower amounts of carbohydrate are usually associated with unrefined foods, including beans, tubers, rice, and unrefined fruit^{[ dubious – discuss ]}.^[20] Brute-based foods generally take the everyman saccharide levels, although milk does comprise a high proportion of lactose.

Organisms typically cannot metabolize all types of carbohydrate to yield energy. Glucose is a virtually universal and accessible source of energy. Many organisms too have the ability to metabolize other monosaccharides and disaccharides but glucose is often metabolized first. In Escherichia coli, for example, the lac operon will express enzymes for the digestion of lactose when information technology is present, but if both lactose and glucose are nowadays the lac operon is repressed, resulting in the glucose being used first (see: Diauxie). Polysaccharides are also common sources of energy. Many organisms tin easily break down starches into glucose; most organisms, withal, cannot metabolize cellulose or other polysaccharides like chitin and arabinoxylans. These carbohydrate types can exist metabolized by some bacteria and protists. Ruminants and termites, for instance, use microorganisms to process cellulose. Even though these complex carbohydrates are not very digestible, they represent an of import dietary element for humans, chosen dietary cobweb. Fiber enhances digestion, among other benefits.^[21]

The Plant of Medicine recommends that American and Canadian adults go between 45 and 65% of dietary free energy from whole-grain carbohydrates.^[22] The Food and Agriculture Organization and World Health Organisation jointly recommend that national dietary guidelines gear up a goal of 55–75% of total free energy from carbohydrates, but only 10% directly from sugars (their term for simple carbohydrates).^[23] A 2017 Cochrane Systematic Review concluded that there was insufficient evidence to back up the merits that whole grain diets can impact cardiovascular disease.^[24]

Classification [edit]

Nutritionists often refer to carbohydrates every bit either simple or circuitous. However, the exact distinction between these groups can be ambiguous. The term complex carbohydrate was first used in the U.S. Senate Select Committee on Nutrition and Human Needs publication Dietary Goals for the Usa (1977) where it was intended to distinguish sugars from other carbohydrates (which were perceived to be nutritionally superior).^[25] However, the study put "fruit, vegetables and whole-grains" in the circuitous carbohydrate column, despite the fact that these may contain sugars equally well as polysaccharides. This confusion persists every bit today some nutritionists use the term complex carbohydrate to refer to whatever sort of digestible saccharide nowadays in a whole nutrient, where fiber, vitamins and minerals are besides constitute (as opposed to processed carbohydrates, which provide free energy but few other nutrients). The standard usage, nonetheless, is to classify carbohydrates chemically: simple if they are sugars (monosaccharides and disaccharides) and complex if they are polysaccharides (or oligosaccharides).^[26]

In whatsoever example, the elementary vs. complex chemical distinction has little value for determining the nutritional quality of carbohydrates.^[26] Some elementary carbohydrates (e.g. fructose) enhance claret glucose speedily, while some complex carbohydrates (starches), enhance blood sugar slowly. The speed of digestion is determined by a variety of factors including which other nutrients are consumed with the carbohydrate, how the food is prepared, individual differences in metabolism, and the chemistry of the carbohydrate.^[27] Carbohydrates are sometimes divided into "available carbohydrates", which are absorbed in the small intestine and "unavailable carbohydrates", which pass to the large intestine, where they are bailiwick to fermentation by the gastrointestinal microbiota.^[28]

The USDA's Dietary Guidelines for Americans 2010 phone call for moderate- to loftier-carbohydrate consumption from a counterbalanced nutrition that includes 6 one-ounce servings of grain foods each twenty-four hour period, at least half from whole grain sources and the residue from enriched.^[29]

The glycemic index (GI) and glycemic load concepts have been developed to characterize food behavior during human digestion. They rank carbohydrate-rich foods based on the rapidity and magnitude of their result on blood glucose levels. Glycemic index is a measure of how quickly nutrient glucose is captivated, while glycemic load is a measure of the total absorbable glucose in foods. The insulin alphabetize is a similar, more contempo classification method that ranks foods based on their effects on blood insulin levels, which are acquired by glucose (or starch) and some amino acids in food.

Wellness furnishings of dietary carbohydrate restriction [edit]

Low-carbohydrate diets may miss the health advantages – such every bit increased intake of dietary fiber – afforded past high-quality carbohydrates found in legumes and pulses, whole grains, fruits, and vegetables.^{[xxx] [31]} Disadvantages of the diet might include halitosis, headache and constipation, and in general the potential agin effects of carbohydrate-restricted diets are under-researched, particularly for possible risks of osteoporosis and cancer incidence.^[32]

Saccharide-restricted diets tin can be as effective as depression-fat diets in helping achieve weight loss over the short term when overall calorie intake is reduced.^[33] An Endocrine Society scientific statement said that "when calorie intake is held constant [...] body-fatty accumulation does not appear to be affected past even very pronounced changes in the amount of fat vs saccharide in the diet."^[33] In the long term, effective weight loss or maintenance depends on calorie restriction,^[33] not the ratio of macronutrients in a diet.^[34] The reasoning of diet advocates that carbohydrates cause undue fat aggregating past increasing blood insulin levels, and that low-sugar diets have a "metabolic reward", is not supported past clinical evidence.^{[33] [35]} Further, it is not clear how low-carbohydrate dieting affects cardiovascular wellness, although two reviews showed that saccharide restriction may better lipid markers of cardiovascular disease risk.^{[36] [37]}

Sugar-restricted diets are no more than effective than a conventional healthy nutrition in preventing the onset of type 2 diabetes, but for people with type 2 diabetes, they are a viable selection for losing weight or helping with glycemic command.^{[38] [39] [40]} There is limited testify to support routine utilise of depression-carbohydrate dieting in managing blazon ane diabetes.^[41] The American Diabetes Association recommends that people with diabetes should adopt a generally healthy diet, rather than a nutrition focused on saccharide or other macronutrients.^[forty]

An extreme course of low-sugar nutrition – the ketogenic diet – is established as a medical diet for treating epilepsy.^[42] Through glory endorsement during the early 21st century, it became a fad diet equally a means of weight loss, but with risks of undesirable side furnishings, such every bit low energy levels and increased hunger, insomnia, nausea, and gastrointestinal discomfort.^[42] The British Dietetic Association named information technology one of the "top 5 worst celeb diets to avoid in 2018".^[42]

Metabolism [edit]

Sugar metabolism is the series of biochemical processes responsible for the germination, breakdown and interconversion of carbohydrates in living organisms.

The most of import saccharide is glucose, a simple sugar (monosaccharide) that is metabolized by nigh all known organisms. Glucose and other carbohydrates are role of a broad multifariousness of metabolic pathways across species: plants synthesize carbohydrates from carbon dioxide and water by photosynthesis storing the absorbed energy internally, often in the course of starch or lipids. Plant components are consumed by animals and fungi, and used every bit fuel for cellular respiration. Oxidation of one gram of carbohydrate yields approximately sixteen kJ (4 kcal) of energy, while the oxidation of i gram of lipids yields about 38 kJ (9 kcal). The human trunk stores between 300 and 500 g of carbohydrates depending on torso weight, with the skeletal musculus contributing to a large portion of the storage.^[43] Free energy obtained from metabolism (e.one thousand., oxidation of glucose) is usually stored temporarily within cells in the form of ATP.^[44] Organisms capable of anaerobic and aerobic respiration metabolize glucose and oxygen (aerobic) to release free energy, with carbon dioxide and water as byproducts.

Catabolism [edit]

Catabolism is the metabolic reaction which cells undergo to break down larger molecules, extracting energy. There are two major metabolic pathways of monosaccharide catabolism: glycolysis and the citric acid cycle.

In glycolysis, oligo- and polysaccharides are cleaved kickoff to smaller monosaccharides by enzymes called glycoside hydrolases. The monosaccharide units tin then enter into monosaccharide catabolism. A 2 ATP investment is required in the early steps of glycolysis to phosphorylate Glucose to Glucose six-Phosphate (G6P) and Fructose 6-Phosphate (F6P) to Fructose 1,vi-biphosphate (FBP), thereby pushing the reaction forrard irreversibly.^[43] In some cases, equally with humans, not all sugar types are usable every bit the digestive and metabolic enzymes necessary are not present.

Saccharide chemistry [edit]

Carbohydrate chemistry is a large and economically important co-operative of organic chemistry. Some of the main organic reactions that involve carbohydrates are:

• Amadori rearrangement
• Saccharide acetalisation
• Saccharide digestion
• Cyanohydrin reaction
• Koenigs–Knorr reaction
• Lobry de Bruyn–Van Ekenstein transformation
• Nef reaction
• Wohl degradation

See likewise [edit]

• Bioplastic
• Carbohydrate NMR
• Gluconeogenesis - A process where glucose can be synthesized by not-carbohydrate sources.
• Glycobiology
• Glycogen
• Glycoinformatics
• Glycolipid
• Glycome
• Glycomics
• Glycosyl
• Macromolecule
• Saccharic acid

References [edit]

1. ^ Flitsch SL, Ulijn RV (January 2003). "Sugars tied to the spot". Nature. 421 (6920): 219–20. Bibcode:2003Natur.421..219F. doi:10.1038/421219a. PMID 12529622. S2CID 4421938.
2. ^ ^{a b} Avenas P (2012). "Etymology of main polysaccharide names" (PDF). In Navard P (ed.). The European Polysaccharide Network of Excellence (EPNOE). Wien: Springer-Verlag. Archived from the original (PDF) on February 9, 2018. Retrieved January 28, 2018.
3. ^ Maton A, Hopkins J, McLaughlin CW, Johnson Due south, Warner MQ, LaHart D, Wright JD (1993). Human being Biology and Health . Englewood Cliffs, New Bailiwick of jersey: Prentice Hall. pp. 52–59. ISBN978-0-13-981176-0.
4. ^ USDA National Nutrient Database, 2015, p. fourteen
5. ^ Cummings, John H. (2001). The Effect of Dietary Cobweb on Fecal Weight and Composition (third ed.). Boca Raton, Florida: CRC Press. p. 184. ISBN978-0-8493-2387-4.
6. ^ Byrne CS, Chambers ES, Morrison DJ, Frost M (September 2015). "The function of short concatenation fatty acids in appetite regulation and energy homeostasis". International Journal of Obesity. 39 (ix): 1331–viii. doi:10.1038/ijo.2015.84. PMC4564526. PMID 25971927.
7. ^ Fearon WF (1949). Introduction to Biochemistry (2nd ed.). London: Heinemann. ISBN9781483225395.
8. ^ USDA National Nutrient Database, 2015, p. 13
9. ^ Coulter JM, Barnes CR, Cowles HC (1930). A Textbook of Botany for Colleges and Universities. ISBN9781113909954.
10. ^ Burtis CA, Ashwood ER, Tietz NW (2000). Tietz fundamentals of clinical chemistry. ISBN9780721686349.
11. ^ Matthews CE, Van Holde KE, Ahern KG (1999). Biochemistry (3rd ed.). Benjamin Cummings. ISBN978-0-8053-3066-iii. ^{[ page needed ]}
12. ^ "Chapter i – The role of carbohydrates in nutrition". Carbohydrates in human nutrition. FAO Nutrient and Diet Paper – 66. Nutrient and Agriculture System of the United nations.
13. ^ Bertozzi CR, Rabuka D (2017). "Structural Basis of Glycan Diversity". Essentials of Glycobiology (tertiary ed.). Common cold Spring Harbor (NY): Common cold Jump Harbor Laboratory Press. ISBN978-i-621821-32-8.
14. ^ Campbell NA, Williamson B, Heyden RJ (2006). Biological science: Exploring Life. Boston, Massachusetts: Pearson Prentice Hall. ISBN978-0-xiii-250882-7.
15. ^ Pigman W, Horton D (1972). "Chapter one: Stereochemistry of the Monosaccharides". In Pigman and Horton (ed.). The Carbohydrates: Chemistry and Biochemistry Vol 1A (2nd ed.). San Diego: Academic Press. pp. 1–67. ISBN9780323138338.
16. ^ Pigman W, Anet E (1972). "Chapter four: Mutarotations and Actions of Acids and Bases". In Pigman and Horton (ed.). The Carbohydrates: Chemistry and Biochemistry Vol 1A (2d ed.). San Diego: Academic Printing. pp. 165–94. ISBN9780323138338.
17. ^ "lyxoflavin". Merriam-Webster.
18. ^ "Show Foods". usda.gov. Archived from the original on Oct 3, 2017. Retrieved June 4, 2014.
19. ^ "Calculation of the Energy Content of Foods – Energy Conversion Factors". fao.org.
20. ^ "Saccharide reference list" (PDF). world wide web.diabetes.org.uk. Archived from the original (PDF) on March 14, 2016. Retrieved October thirty, 2016.
21. ^ Pichon L, Huneau JF, Fromentin Yard, Tomé D (May 2006). "A loftier-poly peptide, loftier-fat, sugar-gratis nutrition reduces energy intake, hepatic lipogenesis, and adiposity in rats". The Periodical of Nutrition. 136 (5): 1256–sixty. doi:ten.1093/jn/136.five.1256. PMID 16614413.
22. ^ Food and Nutrition Board (2002/2005). Dietary Reference Intakes for Free energy, Carbohydrate, Fiber, Fat, Fatty Acids, Cholesterol, Protein and Amino Acids Archived February x, 2007, at archive.today. Washington, D.C.: The National Academies Press. Page 769 Archived September 12, 2006, at the Wayback Auto. ISBN 0-309-08537-three.
23. ^ Joint WHO/FAO skilful consultation (2003). [1] (PDF). Geneva: World Health Organization. pp. 55–56. ISBN 92-four-120916-Ten.
24. ^ Kelly SA, Hartley L, Loveman E, Colquitt JL, Jones HM, Al-Khudairy Fifty, Clar C, Germanò R, Lunn Hour, Frost Grand, Rees Thou (2017). "Whole grain cereals for the primary or secondary prevention of cardiovascular disease" (PDF). The Cochrane Database of Systematic Reviews. 8: CD005051. doi:10.1002/14651858.CD005051.pub3. PMC6484378. PMID 28836672. Archived from the original (PDF) on September 28, 2018. Retrieved September 27, 2018.
25. ^ Joint WHO/FAO expert consultation (1998), Carbohydrates in human being nutrition, chapter 1. ISBN 92-5-104114-eight.
26. ^ ^{a b} "Carbohydrates". The Nutrition Source. Harvard School of Public Health. September eighteen, 2012. Retrieved April three, 2013.
27. ^ Jenkins DJ, Jenkins AL, Wolever TM, Thompson LH, Rao AV (Feb 1986). "Simple and circuitous carbohydrates". Diet Reviews. 44 (2): 44–ix. doi:x.1111/j.1753-4887.1986.tb07585.10. PMID 3703387.
28. ^ Hedley, C. L. (2001). Carbohydrates in Grain Legume Seeds: Improving Nutritional Quality and Agronomic Characteristics. CABI. p. 79. ISBN978-0-85199-944-nine.
29. ^ DHHS and USDA, Dietary Guidelines for Americans 2010 Archived August 20, 2014, at the Wayback Automobile.
30. ^ Seidelmann, Sara B; Claggett, Brian; Cheng, Susan; Henglin, Mir; Shah, Amil; Steffen, Lyn M; Folsom, Aaron R; Rimm, Eric B; Willett, Walter C; Solomon, Scott D (2018). "Dietary saccharide intake and bloodshed: a prospective cohort study and meta-analysis". The Lancet. Public Health (Meta-analysis). iii (9): e419–e428. doi:10.1016/s2468-2667(18)30135-x. ISSN 2468-2667. PMC6339822. PMID 30122560.
31. ^ Reynolds A, Mann J, Cummings J, Winter North, Mete East, Te Morenga L (January 10, 2019). "Sugar quality and human being health: a series of systematic reviews and meta-analyses" (PDF). Lancet (Review). 393 (10170): 434–445. doi:10.1016/S0140-6736(xviii)31809-9. PMID 30638909. S2CID 58632705.
32. ^ Churuangsuk C, Kherouf M, Combet Due east, Lean 1000 (2018). "Low-carbohydrate diets for overweight and obesity: a systematic review of the systematic reviews" (PDF). Obesity Reviews (Systematic review). 19 (12): 1700–1718. doi:x.1111/obr.12744. PMID 30194696. S2CID 52174104.
33. ^ ^{a b c d} Schwartz MW, Seeley RJ, Zeltser LM, Drewnowski A, Ravussin E, Redman LM, et al. (2017). "Obesity Pathogenesis: An Endocrine Society Scientific Statement". Endocrine Reviews. 38 (4): 267–296. doi:10.1210/er.2017-00111. PMC5546881. PMID 28898979.
34. ^ Butryn ML, Clark VL, Coletta MC (2012). Akabas SR, et al. (eds.). Behavioral approaches to the handling of obesity. Textbook of Obesity. John Wiley & Sons. p. 259. ISBN978-0-470-65588-7. Taken together, these findings indicate that calorie intake, not macronutrient composition, determines long-term weight loss maintenance.
35. ^ Hall KD (2017). "A review of the carbohydrate-insulin model of obesity". European Periodical of Clinical Nutrition (Review). 71 (three): 323–326. doi:10.1038/ejcn.2016.260. PMID 28074888. S2CID 54484172.
36. ^ Mansoor N, Vinknes KJ, Veierød MB, Retterstøl K (February 2016). "Furnishings of low-carbohydrate diets five. depression-fat diets on body weight and cardiovascular risk factors: a meta-analysis of randomised controlled trials". The British Journal of Nutrition. 115 (iii): 466–79. doi:10.1017/S0007114515004699. PMID 26768850. S2CID 21670516.
37. ^ Gjuladin-Hellon T, Davies IG, Penson P, Amiri Baghbadorani R (2019). "Effects of carbohydrate-restricted diets on low-density lipoprotein cholesterol levels in overweight and obese adults: a systematic review and meta-analysis" (PDF). Nutrition Reviews (Systematic review). 77 (3): 161–180. doi:10.1093/nutrit/nuy049. PMID 30544168. S2CID 56488132.
38. ^ Brouns F (2018). "Overweight and diabetes prevention: is a low-carbohydrate-high-fat diet recommendable?". Eur J Nutr (Review). 57 (4): 1301–1312. doi:10.1007/s00394-018-1636-y. PMC5959976. PMID 29541907.
39. ^ Meng Y, Bai H, Wang S, Li Z, Wang Q, Chen Fifty (2017). "Efficacy of low carbohydrate diet for type 2 diabetes mellitus management: A systematic review and meta-analysis of randomized controlled trials". Diabetes Inquiry and Clinical Practice. 131: 124–131. doi:x.1016/j.diabres.2017.07.006. PMID 28750216.
40. ^ ^{a b} American Diabetes Association Professional Practice Committee (2019). "Professional Practice Commission: Standards of Medical Care in Diabetes—2019". Diabetes Care. 42 (Supplement ane): s46–s60. doi:10.2337/dc19-S005. PMID 30559231.
41. ^ Seckold R, Fisher Due east, de Bock M, Male monarch BR, Smart CE (2019). "The ups and downs of low-carbohydrate diets in the management of Type 1 diabetes: a review of clinical outcomes". Diabet. Med. (Review). 36 (three): 326–334. doi:10.1111/dme.13845. PMID 30362180. S2CID 53102654.
42. ^ ^{a b c} "Top 5 worst celeb diets to avoid in 2018". British Dietetic Clan. Dec 7, 2017. Retrieved December 1, 2020. The British Dietetic Association (BDA) today revealed its much-anticipated annual list of glory diets to avoid in 2018. The line-up this twelvemonth includes Raw Vegan, Alkaline, Pioppi and Ketogenic diets as well as Katie Price'due south Nutritional Supplements.
43. ^ ^{a b} Maughan, Ron (June 2013). "Surgery Oxford". www.onesearch.cuny.edu. ^{[ permanent dead link ]}
44. ^ Mehta S (Oct 9, 2013). "Energetics of Cellular Respiration (Glucose Metabolism)". Biochemistry Notes, Notes.

Further reading [edit]

• "Compolition of foods raw, processed, prepared" (PDF). Us Section of Agriculture. September 2015. Retrieved October 30, 2016.

External links [edit]

• Carbohydrates, including interactive models and animations (Requires MDL Chime)
• IUPAC-IUBMB Joint Committee on Biochemical Nomenclature (JCBN): Carbohydrate Classification
• Carbohydrates detailed
• Carbohydrates and Glycosylation – The Virtual Library of Biochemistry, Molecular Biological science and Cell Biology
• Functional Glycomics Gateway, a collaboration between the Consortium for Functional Glycomics and Nature Publishing Group

reesecastand.blogspot.com

Source: https://en.wikipedia.org/wiki/Carbohydrate

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