What is a chemical substance in LAB and what does lab mean

It should be la, the data is as follows:

Element symbol: la

Chinese name: lanthanum.

English name: lanthanum

Atomic number: 57

Atomic Weight: Peripheral Electron Configuration: 5d1 6s2

Extranuclear electron configuration: 2, 8, 18, 18, 9, 2

Common valency: +3

Density: melting point: 918

Boiling Point: 3464

Period: 6

Number of families: iiib

Atomic Radius: Ionic Radius:

Covalent Radius: Isotope & Radioactivity: LA-138 (LA-139

Found by: Carl Mosander

Location of discovery: Sweden.

Origin of the name: greek: lanthanein (to be hidden).

Element descriptions: soft, silvery-white, malleable, ductile metal

Element**: Found with rare earths in monazite and bastnasite monazite sand typicall contains 25% lanthanum.

element usage: it is used in the electodes of high-intensity, carbon-arc lights also used in the production of high-grade europium metal.

because it gives glass refractive properties, it is used in expensive camera lenses.

There is no such thing, is it a code name.

Are you sure it's a chemical?

Lab is generally an abbreviation for laboratory.

lab noun n

1.Laboratory, research room.

lab.Abbreviation abbr

1.=labrador

2.=laborite

3.=labour advisory board lab

Abbreviation abbr

1.=label(ing)

2.=labor(atory)

Web paraphrasing. lab1.Laboratory.

2.Labor. lab1.Straight-chain alkylbenzene.

It's the colloquial language of the lab. The full name is laboratory or labouratory

Lab is the abbreviation of laboratory, which means that you can use both.

lab

English [l b] American [l b].n.laboratories, research rooms; Lab, British Political Labour Party; analysis room; Darkroom;

The lab has recently been updated to allow for more advanced courses

The lab has recently been updated to allow for more advanced courses.

[Other] plural: labs

laboratory.

The word lab, which can be abbreviated as lab, comes from the medieval Latin word laboratorium, which originated from the word labor, which means "labor". The true meaning of laboratory is "the place of labor", where many scientific phenomena and principles are discovered and studied.

demo should mean demonstration, and it's right to go upstairs.

A computer lab, also known as a computer suite or known computer cluster (a phase can also be used for server clusters) is a typical room that contains many network computers for public use. Computer labs can be found in libraries, schools, buildings, science labs, community centers, and research centers where IT company departments need such a place for employees to do their work, and research centers. They differ from what the use of in this computer lab is usually associated with access to these free Internet cafes.

It can be understood as a computer room, that is, a place where you can access the Internet.

It is the meaning of the color card, that is, the color sample. View the original post

The LAB color space is a color-antithetical space, with dimensions L for luminance and A and B for color opposition, based on non-linear compression of CIE XYZ color space coordinates.

The coordinates of the Hunter 1948 L, A, B color space are L, A, and B. [1][2] However, Lab is often used as an informal abbreviation for the CIE 1976 (L*, A*, B*) color space (also known as CIELAB, whose coordinates are actually L*, A*, and B*). So the initials lab itself are ambiguous.

These two color spaces are related in purpose but different in implementation.

Unlike RGB and CMYK color spaces, Lab Colors are designed to approximate human vision. It is dedicated to perceptual uniformity, and its l component closely matches human luminance perception. Therefore, it can be used to do accurate color balance by modifying the output levels of the A and B components, or to adjust the luminance contrast using the L component.

These transformations are difficult or impossible in RGB or CMYK, and they model the output of a physical device, rather than human visual perception.

Because the lab space is larger than a computer monitor, printer, or even the color gamut of human vision, a bitmap represented as a lab requires more data per pixel to get the same accuracy than an RGB or CMYK bitmap. In the 1990s, computer hardware and software were often limited to storing and manipulating bitmaps for 8-bit channels, and the conversion from RGB images to labs was a lossy operation. This is not a problem with the 16-bit channel support that is now common.

In addition, many of the "colors" in the lab space are beyond the horizon of human vision and are therefore purely hypothetical; These "colors" cannot be regenerated in the physical world. Through color management software, such as those built into image applications, which can select the closest approximation within the color gamut and change luminance, saturation, and sometimes hue during processing, it is useful for Dan Margulis to claim the right to use imaginary colors between multiple steps of image manipulation.

In Adobe Photoshop, the "Lab mode" used by images is CIELAB D50

In the ICC Profile, the CIELAB D50 is used as the Profile connection space for the "Lab Color Space".

In a TIFF file, the CIELAB color space can be used.

In PDF documents, the "Lab Color Space" is CIELAB.

The lab mode consists of three channels, but not the R, G, and B channels. One of its channels is luminance, i.e., l. The other two are color channels, denoted by a and b.

The colors included in the a-channel range from dark green (base brightness value) to gray (medium brightness value) to bright pink (high brightness value); The b-channel goes from bright blue (base brightness) to gray (medium brightness) to yellow (high brightness).