An ion pump is a type of device or mechanism that moves ions across a membrane, often against their concentration gradient, using energy. In physics and biophysics, ion pumps are essential for maintaining the electrochemical gradients across cellular membranes, which are crucial for various biological processes, such as nerve impulse transmission and muscle contraction.
Edwards Vacuum is a company that specializes in the design and manufacturing of vacuum pumps and related equipment. Founded in 1919, it has established itself as a leader in the vacuum technology sector, serving a variety of industries including semiconductor manufacturing, pharmaceuticals, biotechnology, and industrial applications, among others. The company offers a wide range of products, including rotary vane pumps, turbo pumps, and dry pumps, along with vacuum systems, components, and services.
A diffusion pump is a type of vacuum pump that uses vapor dynamic processes to achieve high vacuum levels, typically in the range of 10^-3 to 10^-10 torr. It works by utilizing a jet of vapor, usually from a fluid such as oil or mercury, which is directed into a diffusion chamber. **Key components and operation:** 1. **Vapor Source:** The pump contains a heated reservoir where the fluid is vaporized.
A cryopump is a type of vacuum pump that uses cryogenic temperatures to remove gas from a vacuum chamber. It operates by cooling a surface to very low temperatures, typically using liquid cryogens like liquid nitrogen or helium, which causes gases to condense or freeze onto the surface.
A Residual Gas Analyzer (RGA) is an analytical instrument used to identify and measure the composition of gases present in a vacuum environment. It is commonly employed in various scientific and industrial applications, including vacuum processing, semiconductor manufacturing, surface analysis, and material characterization. ### Key Features of Residual Gas Analyzers: 1. **Detection Principle:** RGAs typically use mass spectrometry as their detection method.
A Pirani gauge is a type of vacuum gauge used to measure very low pressures, typically in the range of 10^-3 to 10^-9 Torr (or similar units). It operates on the principle of thermal conductivity, which is influenced by the density of gas molecules surrounding a heated element. ### Key Features and Operation: 1. **Basic Components**: The Pirani gauge typically consists of a filament (or wire) that is heated electrically.
A McLeod gauge is an instrument used to measure very low pressures, particularly in the range of 0.1 to 10^-6 torr (or approximately 0.1 to 10^-6 mmHg). It operates based on the principle of gas compression and relies on Gay-Lussac's law of gas behavior. The device consists of a small volume of gas that is compressed into a manometer tube.
A hot-filament ionization gauge (HFIG) is a type of vacuum gauge used to measure low pressures, typically in the range of 10^-3 to 10^-9 torr (or mbar). It operates based on the principle of ionization created by a hot filament, which serves as the electron source.
Zojirushi is a Japanese company known for manufacturing high-quality kitchen appliances and household products, particularly thermal insulation products. Founded in 1918, Zojirushi originally focused on creating vacuum flasks, but over the years, it has expanded its product line to include rice cookers, bread machines, coffee makers, food jugs, and electric kettles, among others.
Yeti Holdings, often referred to simply as YETI, is an American company known for producing premium outdoor and lifestyle products, particularly coolers, drinkware, and other gear designed for outdoor activities like camping, fishing, and hiking. The brand is recognized for its durable, high-performance products that cater to outdoor enthusiasts.
A vacuum flask, also known as a thermos, is a container designed to keep liquids hot or cold for an extended period. It typically consists of two walls, an inner and an outer layer, that create a vacuum between them. This vacuum minimizes heat transfer via conduction and convection, effectively insulating the contents. Here are some key features of vacuum flasks: 1. **Insulation**: The vacuum layer serves as an insulator, preventing heat transfer.
Tiger Corporation is a Japanese company known primarily for its manufacturing of thermal insulation products, mainly vacuum flasks and food storage containers. Founded in 1923 and based in Osaka, Japan, Tiger Corporation has gained a strong reputation for its high-quality products that combine functionality with innovative design. The company is especially noted for its vacuum technology, which helps to keep beverages hot or cold for extended periods. In addition to thermal products, Tiger Corporation also produces a variety of kitchen appliances and cookware.
Thermos LLC is a company best known for its vacuum-insulated containers, including bottles, flasks, and food storage solutions. Founded in 1904, Thermos pioneered the use of vacuum insulation technology, which helps maintain the temperature of hot and cold liquids for extended periods. The brand is synonymous with durable and portable drinkware and food containers designed for both everyday use and outdoor activities.
Tervis Tumbler is a brand known for its insulated drinkware and tumblers, which are designed to keep beverages hot or cold for extended periods. Founded in 1946, Tervis products are made from durable, reusable materials such as plastic, stainless steel, and are often emblazoned with various designs, logos, and patterns. The tumblers feature a double-wall construction that creates an insulating layer of air, which helps to prevent condensation and keeps drinks at the desired temperature.
A Stanley bottle, often referred to as a Stanley thermos or Stanley vacuum bottle, is a type of insulated container designed to keep beverages hot or cold for extended periods. The original Stanley thermos was invented in 1913 by William Stanley Jr. and is known for its durability and rugged design, making it popular among outdoor enthusiasts, campers, and professionals. Stanley bottles typically feature a vacuum insulation technology, which helps in maintaining the temperature of the contents inside.
Hydro Flask is a brand known for its high-quality insulated stainless steel drinkware, including water bottles, tumblers, and food containers. Founded in 2009 in Bend, Oregon, Hydro Flask became popular for its durable, vacuum-insulated technology that keeps beverages cold for up to 24 hours or hot for up to 12 hours. The products are designed for outdoor enthusiasts and are available in a variety of sizes and colors.
"Esky" can refer to a couple of different things, depending on the context: 1. **Esky (Brand)**: Esky is a brand that is well-known for manufacturing portable coolers or ice boxes that are used for keeping food and drinks cold. They are popular for outdoor activities like camping, picnics, and tailgating.
A cryostat is a device used to maintain very low temperatures for scientific and industrial applications. It achieves this by providing a controlled environment that can cool samples or materials to temperatures often below -150 degrees Celsius (-238 degrees Fahrenheit). Cryostats are essential in various fields such as physics, materials science, biology, and medicine, where studying the properties of materials at low temperatures is crucial.
A cryogenic storage dewar, commonly referred to simply as a "dewar," is a specialized container designed for the storage and transport of cryogenic liquids, such as liquid nitrogen, liquid helium, or other gases that have been cooled to extremely low temperatures. The design of a dewar is intended to minimize heat transfer from the environment into the stored cryogenic substance, keeping it at very low temperatures for extended periods.
The American Thermos Bottle Company Laurel Hill Plant, located in South Carolina, is a facility operated by the American Thermos Bottle Company, which specializes in the production of vacuum-sealed beverage containers and other insulated products. Historically, the company is known for its iconic thermos bottles, which have been popular for their ability to keep beverages hot or cold for extended periods. The Laurel Hill Plant has played a significant role in the manufacturing and distribution of these products and has contributed to the local economy.

Pinned article: Introduction to the OurBigBook Project

Welcome to the OurBigBook Project! Our goal is to create the perfect publishing platform for STEM subjects, and get university-level students to write the best free STEM tutorials ever.
Everyone is welcome to create an account and play with the site: ourbigbook.com/go/register. We belive that students themselves can write amazing tutorials, but teachers are welcome too. You can write about anything you want, it doesn't have to be STEM or even educational. Silly test content is very welcome and you won't be penalized in any way. Just keep it legal!
We have two killer features:
  1. topics: topics group articles by different users with the same title, e.g. here is the topic for the "Fundamental Theorem of Calculus" ourbigbook.com/go/topic/fundamental-theorem-of-calculus
    Articles of different users are sorted by upvote within each article page. This feature is a bit like:
    • a Wikipedia where each user can have their own version of each article
    • a Q&A website like Stack Overflow, where multiple people can give their views on a given topic, and the best ones are sorted by upvote. Except you don't need to wait for someone to ask first, and any topic goes, no matter how narrow or broad
    This feature makes it possible for readers to find better explanations of any topic created by other writers. And it allows writers to create an explanation in a place that readers might actually find it.
    Figure 1.
    Screenshot of the "Derivative" topic page
    . View it live at: ourbigbook.com/go/topic/derivative
  2. local editing: you can store all your personal knowledge base content locally in a plaintext markup format that can be edited locally and published either:
    This way you can be sure that even if OurBigBook.com were to go down one day (which we have no plans to do as it is quite cheap to host!), your content will still be perfectly readable as a static site.
    Figure 5. . You can also edit articles on the Web editor without installing anything locally.
    Video 3.
    Edit locally and publish demo
    . Source. This shows editing OurBigBook Markup and publishing it using the Visual Studio Code extension.
  3. https://raw.githubusercontent.com/ourbigbook/ourbigbook-media/master/feature/x/hilbert-space-arrow.png
  4. Infinitely deep tables of contents:
    Figure 6.
    Dynamic article tree with infinitely deep table of contents
    .
    Descendant pages can also show up as toplevel e.g.: ourbigbook.com/cirosantilli/chordate-subclade
All our software is open source and hosted at: github.com/ourbigbook/ourbigbook
Further documentation can be found at: docs.ourbigbook.com
Feel free to reach our to us for any help or suggestions: docs.ourbigbook.com/#contact