The drop is a unit of measure of volume, the amount dispensed as one drop from a dropper. It is often used in giving quantities of liquid drugs to patients, and occasionally in cooking.
The volume of a drop is not well-defined: it depends on the device and technique used to produce the drop, on the strength of the gravitational field, and on the density and the surface tension of the liquid.[1]
There are several exact definitions of a "drop":
- the "metric" drop, 1/20 mL (50 μL)[2]
- in medicine, IV drips deliver 10, 15, or 20 drops per mL for macrodrip, 60 per mL for microdrip[3]
- an informal (and incorrect) synonym for minim, the smallest unit of fluid measure in the Apothecaries' systems of the United States customary units, Imperial units, and pre-1824 English units equal to 1/60 of a fluid dram or 1/480 of a fluid ounce
- prior to the adoption of the minim in the early 19th century, the smallest unit of fluid measure in the Apothecaries' systems of the United States customary units and pre-1824 English units, inexact, but presumed to be equal to 1/60 of a fluid dram or 1/480 of a fluid ounce
History [link]
In the first decade of the 19th century, the minim, the smallest unit of Apothecary Measure, was promoted by the pharmaceutical and medical establishments as an alternative to the drop.[4] It was noted that the size of a drop can vary considerably depending on the viscosity and specific gravity of the fluid, as well as the size and shape of the vessel from which it is poured. (At the time, surface tension was not well-understood.) The minim came with a set of procedures for ensuring accurate measurement, specifically, diluting powerful medicines that had previously been measured by the drop, then using a "minimometer" or "minim glass" (graduated pipette) with minim marks at regular intervals. The minim was defined as one 60th of a fluid dram or one 480th of a fluid ounce.[5] This is equal to about 61.6 μL (U.S.) or 59.2 μL (Britain).
Pharmacists have since moved to metric measurements, with a drop being rounded to exactly 0.05 mL (that is, 20 drops per milliliter). In hospitals, intravenous tubing is used to deliver medication in drops of various sizes ranging from 10 drops/mL to 60 drops/mL. A drop is abbreviated gtt, with gtts used for the plural. These abbreviations come from gutta, the Latin for drop.[6]
See also [link]
References [link]
- ^ "Drop - size". Physics and Astronomy Online. https://www.physlink.com/education/askexperts/ae681.cfm. Retrieved 2010-03-29.
- ^ Argonne National Laboratory
- ^ Snyder, Dr. Richard; Schoenborn, Barry (3 May 2011). Medical Dosage Calculations for Dummies. John Wiley & Sons. p. 186. ISBN 978-0-470-93064-9. https://books.google.com/books?id=2o4_G0PRIQMC&pg=PA186. Retrieved 8 March 2012.
- ^ Nicholson, William (1809). The British encyclopedia, or Dictionary of arts and sciences comprising an accurate and popular view of the present improved state of human knowledge. Whittingham. p. 264. https://books.google.com/books?id=jYAPAAAAQAAJ&pg=PT264. Retrieved 18 December 2011.
- ^ Royal College of Physicians of London; Richard Powell (1809). The pharmacopoeia of the Royal College of Physicians of London, M. DCCC. IX. Longman, Hurst, Rees, and Orme. p. 6-7. https://books.google.com/books?id=pCPrAAAAMAAJ&pg=PA6. Retrieved 18 December 2011.
- ^ Hugh Cornelius Muldoon (1916). Lessons in pharmaceutical Latin and prescription writing and interpretation. John Wiley & sons, inc.. p. 147. https://books.google.com/books?id=Ch44AAAAMAAJ. Retrieved 8 March 2012.
https://wn.com/Drop_(unit)
Drop (music)
A drop in popular music, especially electronic music styles, is a point in a music track where a switch of rhythm or bass line occurs and usually follows a recognizable build section and break.
The term "drop" comes from the composer or producer "dropping in" the primary rhythmic and foundational elements previously hinted at into the mix more or less at once. Related terms, typically describing certain types of drops, include "beat-up" (so named because it is a point where the producer brings up the foundational kick drum beat after having faded it down during a break or buildup) and "climax" (typically describing a single particularly striking drop heard late in the track).
Types
Many genres of EDM can have more than one drop during a track, especially if the song is built on a "dance-pop" verse/chorus with vocals; a drop of some kind is typically heard somewhere during each chorus as the high point of that verse/chorus cycle. Most genres, however, tend to emphasize a single drop as the beginning of the high point, or climax, of the entire track; in vocal subgenres this is typically the last repetition of the chorus, while in nonvocal genres it typically occurs in the last quarter of the track.
Overhand (boxing)
An overhand (or overcut or drop) is a semi-circular and vertical punch thrown with the rear hand. It is usually employed when the opponent is bobbing or slipping. The strategic utility of the drop relying on body weight can deliver a great deal of power.
Left overhand in long range
Left overhand in long range
Right overhand in long range
Right overhand in long range
Left overhand in long range and counterpunch
Left overhand in long range and counterpunch
External links
Movies
Zénith
Zénith is a professional football club based in Cap-Haïtien, Haiti.
Current squad
Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
References
Zenith (building)
The Zenith is a culture and exhibition centre, converted from an old railway reparation hall, located in Freimann, Munich, Germany.
The centre hosts concerts, fairs, company presentations and parties. The centre can hold up to six thousand people and has a floor area of 5046 m². The main stage is 24×16 metres in area. Its capacity is approximately 7,000 people
History
The building is of a unique architectural style, and formerly served as a railway construction and reparation hall. It was originally built from 1916 to 1918. The building is protected.
External links
References
Coordinates: 48°11′41″N 11°36′30″E / 48.19472°N 11.60833°E
Zenith camera
A zenith camera is an astrogeodetic telescope used today primarily for the local surveys of Earth's gravity field. Zenith cameras are designed as transportable field instruments for the direct observation of the plumb line (astronomical coordinates) and vertical deflections.
Instrument
A zenith camera combines an optical lens (about 10–20 cm aperture) with a digital image sensor (CCD) in order to image stars near the zenith. Electronic levels (tilt sensors) serve as a means to point the lens towards zenith. Zenith cameras are generally mounted on a turnable platform to allow star images to be taken in two camera directions (two-face-measurement). Because zenith cameras are usually designed as non-tracking and non-scanning instruments, exposure times are kept short, at the order of few 0.1 s, yielding rather circular star images. Exposure epochs are mostly recorded by means of the timing-capability of GPS-receivers (time-tagging).
Data processing
Depending on the CCD sensor - lens combination used, few 10s to 100s of stars are captured with a single digital zenith image. The positions of imaged stars are measured by means of digital image processing algorithms, such as image moment analysis or point spread functions to fit the star images. Star catalogues, such as Tycho-2 or UCAC-3 are used as celestial reference to reduce the star images. The zenith point is interpolated into the field of imaged stars, and corrected for the exposure time and (small) tilt of the telescope axis to yield the direction of the plumb line.
Podcasts:
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by Laakso
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Drop Out
by: LaaksoI'm not taking any more of this shit
Hey professor, professor please
I'm not a student I'm meant to be an artist
I'm a drop out I'm a drop out
I've never finished anything in my life
I'm a drop out, I'm a drop out
I'm a drop out, but I'm proud
Fighters don't quit and quitters don't fight
Oh yeah you're right
I've been a quitter all the time
Hey professor, professor please
I'm not taking any more of this shit
Hey professor, professor please
I'm not a student I'm meant to be an artist
My friend's new girlfriend, she's so good looking
It is a bit embarrassing
How I'd like to sleep with my friend's girlfriend
Fighters don't quit and quitters don't fight
Oh yeah you're right
I've been a quitter all the time
You should move abroad
You would love New York
There's a million more girls worth fighting for
Well it's good for them
Tell them all good luck
I know what I had and I know what I want
Fighters don't quit and quitters don't fight
Oh yeah you're right