1. the fourth letter of the English alphabet, a consonant. 2. any spoken sound represented by this letter. 3. something shaped like a D. 4. a written or printed representation of the letter D or d.
(Mathematics) maths the first derivative of a function, as in D ( x3 + x2) = 3 x2 + 2 x 4. (General Physics) physics 5. (Aeronautics) aeronautics drag
Also found in: Thesaurus, Medical, Legal, Financial, Acronyms, Idioms, Encyclopedia, Wikipedia . 1. The symbol for the isotope deuterium. 2. also d The symbol for the Roman numeral 500. 3. Sports 4. Democrat 1. The fourth letter of the modern English alphabet. 2. Any of the speech sounds represented by the letter d. 3. The fourth in a series. 4.
Usage notes. The letter d is used in the alphabets of many languages, and in several romanization systems of non-Latin scripts to represent the voiced alveolar or dental plosive ( /d/ ). In some languages and transcription systems, d may also represent other sounds, such as /t/ or /ð/ .
a device, as a printer's type, for reproducing the letter D or d.
di (used in Italian names as an elided form of di): Gabriele d'Annunzio.
Then Pascal responds (in all caps) with, “BUT WE DIDNT WIN A D [sic] YOU KNOW HIM.”
He picked out that simple little study of Cramer in D major in the first book—you know it well—and asked me to play it.
noun, plural D's or Ds, d's or ds.
D Sub-Shell (third outer subshell of an electron shell)
Deaf (member of the Deaf Community who shares a sense of Deaf Culture)
Deaf (person who can not hear but is not part of the Deaf Community)
Deutschverzeichnis (Works of Schubert by Otto Erich Deutsch)
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Vitamin D has other roles in the body, including reduction of inflammation as well as modulation of such processes as cell growth, neuromuscular and immune function, and glucose metabolism [ 1-3 ]. Many genes encoding proteins that regulate cell proliferation, differentiation, and apoptosis are modulated in part by vitamin D. Many tissues have vitamin D receptors, and some convert 25 (OH)D to 1,25 (OH)2D.
Vitamin D obtained from sun exposure, foods, and supplements is biologically inert and must undergo two hydroxylations in the body for activation. The first hydroxylation, which occurs in the liver, converts vitamin D to 25-hydroxyvitamin D [25 (OH)D], also known as “calcidiol.”.
Vitamin D is also needed for the normal development and growth of muscle fibers. In addition, inadequate vitamin D levels can adversely affect muscle strength and lead to muscle weakness and pain (myopathy) [ 1 ].
The analysis of 2015–2016 data also showed that 28% of all individuals aged 2 years and older in the United States took a dietary supplement containing vitamin D [ 38 ]. In addition, 26% of participants aged 2–5 years and 14% of those aged 6–11 years took supplements; rates increased with age from 10% of those aged 12–19 years to 49% of men and 59% of women aged 60 and older. Total vitamin D intakes were three times higher with supplement use than with diet alone; the mean intake from foods and beverages alone for individuals aged 2 and older was 4.8 mcg (192 IU) but increased to 19.9 mcg (796 IU) when dietary supplements were included.
Serum concentration of 25 (OH)D is currently the main indicator of vitamin D status. It reflects vitamin D produced endogenously and that obtained from foods and supplements [ 1 ]. In serum, 25 (OH)D has a fairly long circulating half-life of 15 days [ 1 ]. Serum concentrations of 25 (OH)D are reported in both nanomoles per liter (nmol/L) and nanograms per milliliter (ng/mL). One nmol/L is equal to 0.4 ng/mL, and 1 ng/mL is equal to 2.5 nmol/L.
Screening for vitamin D status is becoming a more common part of the routine laboratory bloodwork ordered by primary-care physicians, irrespective of any indications for this practice [ 6, 51-53 ]. No studies have examined whether such screening for vitamin D deficiency results in improved health outcomes [ 54 ]. The U.S. Preventive Services Task Force (USPSTF) found insufficient evidence to assess the benefits and harms of screening for vitamin D deficiency in asymptomatic adults [ 6 ]. It added that no national professional organization recommends population screening for vitamin D deficiency.
People can develop vitamin D deficiency when usual intakes are lower over time than recommended levels , exposure to sunlight is limited, the kidneys cannot convert 25 (OH)D to its active form, or absorption of vitamin D from the digestive tract is inadequate. Diets low in vitamin D are more common in people who have milk allergy or lactose intolerance and those who consume an ovo-vegetarian or vegan diet [ 1 ].
D offers an innovative approach to concurrency, featuring true immutable data, message passing, no sharing by default, and controlled mutable sharing across threads. Read more.
D allows writing large code fragments without redundantly specifying types, like dynamic languages do. On the other hand, static inference deduces types and other code properties, giving the best of both the static and the dynamic worlds. Show example
The best paradigm is to not impose something at the expense of others. D offers classic polymorphism, value semantics, functional style, generics, generative programming, contract programming, and more—all harmoniously integrated. Show example
Refer to the language specification and the documentation of Phobos, D's standard library. The DMD manual tells you how to use the compiler. Read various articles to deepen your understanding.
D is made possible through the hard work and dedication of many volunteers, with the coordination and outreach of the D Language Foundation, a 501 (c) (3) non-profit organization. You can help further the development of the D language and help grow our community by supporting the Foundation.
Open Windows Explorer. To do so, click the "Start" button on your Windows task bar and select the program labeled "Computer."
Right-click the icon labeled "Local Disk (D:)." If the D drive on your computer is an optical drive, the icon will be labeled something like "CD Drive (D:)" or "DVD Drive (D:)."
Click on the option labeled "Open" to view the contents inside the D drive.