Chemical Seelnium. Linux We test mainly on BCAA supplements for lean muscle mass, but other variations of Linux should also work where the browser manufacturers support them. Geological Survey. Recommended intake.

Selenium -

For humans, the primary pathway of consuming it is through food, followed by water and then by air. As a component of antioxidant enzymes, particularly glutathione reductase, it supports maintenance of healthy tissues throughout the body.

Because it both increases antioxidant capabilities and the quality of blood flow, it can help enhance resistance against diseases and negative effects of stress.

Its ability to fight oxidative stress and excessive inflammation is thought to be due to different types of selenoproteins found in this mineral. Among healthy people in the U. What are the health benefits of taking selenium?

This mineral helps fight the aging process and supports a strong immune system by reducing free radical damage. It has a synergistic effect with other antioxidants like vitamin E, enabling the body to defend against oxidative stress.

Stress, of course, contributes to many conditions, including heart disease, neurological conditions and some cancers. For example, a review found that having a higher level of selenium exposure could offer protection against breast, lung, colon, gastric, esophageal and prostate cancers.

As an essential component of glutathione peroxidase , selenium also helps carry out important enzyme processes that protect lipids fats in cell membranes.

Selenium may be especially helpful if you have a weakened immune system or a history of cancer in your family. Taking high dose selenium supplements has been shown to potentially have anti-cancer effects. According to studies, it may be effective at reducing the risk of cancer incidence , cancer-caused mortality and severity of some types of cancer — specifically in the liver, prostate, colorectal and lungs.

Because it has the special job of activating selenoproteins, this mineral acts in an enzymic role that helps antioxidants to do their job best. There is evidence that it may also help slow down existing cancer progression and tumor growth.

Studies have shown that a high dose can be effective in protecting DNA , which can reduce the risk for cell mutation and cancer development. Other studies show that in areas of the world where the soil is lowest in selenium, cancer risk is increased when compared to areas that have higher levels naturally available.

Low selenium levels are associated with an increased risk of developing cardiovascular disease, potentially along with suffering from a stroke or heart attack. Supplements, or an increase of selenium-rich foods, may be able to help prevent coronary heart disease by protecting arteries against plaque buildup and damage.

Is selenium good for your thyroid? Yes, because this mineral acts as a catalyst for the production of active thyroid hormones. Research now suggests that there is a link between thyroid metabolism and selenium deficiency. Having too little in your diet can impair how your thyroid, and therefore metabolism, works.

The thyroid gland controls numerous important everyday body functions, including appetite, sleep, temperature, weight, energy and more. A problem with proper thyroid function can result in negative symptoms, such as irritability, muscle weakness, fatigue, weight gain or loss, trouble sleeping, and many other reactions.

Does selenium cause weight gain? In fact, because it can help with thyroid function, research suggests it supports a normal metabolism and can aid in weight maintenance. The risk of these conditions increase as we age, but high-antioxidant intake and consumption of essential vitamins and minerals can help defend the body and may contribute to a longer life.

Observational studies have demonstrated that patients with chronic asthma may have lower amounts of selenium in their diets and therefore may be prone to deficiency. According to studies, when people with asthma take selenium supplements, they experience less asthma-related symptoms than those who take placebos.

Experts think that supplementation may be a useful add-on treatment to medication for patients with chronic asthma. Selenium benefits fertility because it is required for proper sperm motility and also increases blood flow. These are two key components involved in conception and beating infertility.

It appears that both low and high selenium concentrations can have a negative influence on the number of sperm, therefore aiming to meet the recommended dietary intake, but not to far exceed it, is important for fertility. Some studies also show that meeting the recommended dietary intake may even potentially reduce the risk of miscarriage, but more data is still needed.

Selenium is a trace mineral, meaning we only need a small amount of selenium from our diets each day. It is important to note that if you already consume the proper amount of selenium from a healthy diet, consuming more may not be beneficial.

High doses reaching micrograms can even be harmful. The recommended daily allowance for selenium depends on your age and is as follows, according to the National Institutes of Health :. In supplement form, it is available in the form of selenomethionine and selenium selenite.

Selenomethionine is usually easier for most people to digest and absorb properly. When taking selenium supplements, most adults should take up to 55 micrograms daily such as of selenomethionine , while pregnant women can take up to 60 micrograms, and lactating women can take up to 70 micrograms.

Based on available research, the tolerable upper limit of selenium the amount taken before side effects will occur is mcg per day. No one should exceed recommendations by supplementing with very high doses without consulting a healthcare professional.

Note: Selenium sulfide is another form of this mineral you may come across. In , after a meeting between the developers at the Google Test Automation Conference, it was decided to merge the two projects, and call the new project Selenium WebDriver, or Selenium 2. In , Philippe Hanrigou then at ThoughtWorks made "Selenium Grid", which provides a hub allowing the running of multiple Selenium tests concurrently on any number of local or remote systems, thus minimizing test execution time.

Pat Lightbody had already made a private cloud for "HostedQA" which he went on to sell to Gomez, Inc. The name Selenium comes from a joke made by Huggins in an email, mocking a competitor named Mercury , saying that you can cure mercury poisoning by taking selenium supplements.

The others that received the email took the name and ran with it. Selenium is composed of several components with each taking on a specific role in aiding the development of web application test automation.

Selenium IDE is a complete integrated development environment IDE for Selenium tests. It is implemented as a Firefox Add-On and as a Chrome Extension.

It allows for recording, editing and debugging of functional tests. It was previously known as Selenium Recorder.

Selenium-IDE was originally created by Shinya Kasatani and donated to the Selenium project in Selenium IDE began being actively maintained in Scripts may be automatically recorded and edited manually providing autocompletion support and the ability to move commands around quickly.

Scripts are recorded in Selenese , a special test scripting language for Selenium. Selenese provides commands for performing actions in a browser click a link, select an option and for retrieving data from the resulting pages.

As an alternative to writing tests in Selenese, tests can also be written in various programming languages. These tests then communicate with Selenium by calling methods in the Selenium Client API. Selenium currently provides client APIs for Java , C , Ruby , JavaScript , R and Python.

Selenium Remote Control RC is a server, written in Java , that accepts commands for the browser via HTTP. RC makes it possible to write automated tests for a web application in any programming language, which allows for better integration of Selenium in existing unit test frameworks.

To make writing tests easier, Selenium project currently provides client drivers for PHP , Python , Ruby ,. NET , Perl and Java. The Java driver can also be used with JavaScript via the Rhino engine. An instance of selenium RC server is needed to launch html test case - which means that the port should be different for each parallel run.

Selenium Remote Control was a refactoring of Driven Selenium or Selenium B designed by Paul Hammant, credited with Jason as co-creator of Selenium. The original version directly launched a process for the browser in question, from the test language of Java,.

NET, Python or Ruby. The wire protocol called 'Selenese' in its day was reimplemented in each language port. After the refactor by Dan Fabulich and Nelson Sproul with help from Pat Lightbody there was an intermediate daemon process between the driving test script and the browser.

The benefits included the ability to drive remote browsers and the reduced need to port every line of code to an increasingly growing set of languages. Selenium Remote Control completely took over from the Driven Selenium code-line in Selenium RC served as the flagship testing framework of the entire project of selenium for a long-standing time.

And significantly [ editorializing ] Selenium RC is the first and foremost automated web testing tool that enabled users to adopt their preferred programming language.

With the release of Selenium 2, Selenium RC has been officially deprecated in favor of Selenium WebDriver. At the core of Selenium is Selenium WebDriver, an interface to write instructions that work interchangeably across browsers.

It is the successor to Selenium RC. Selenium WebDriver accepts commands sent in Selenese, or via a Client API and sends them to a browser. This is implemented through a browser-specific browser driver, which sends commands to a browser and retrieves results.

Most browser drivers actually launch and access a browser application such as Firefox , Google Chrome , Internet Explorer , Safari , or Microsoft Edge ; there is also an HtmlUnit browser driver, which simulates a browser using the headless browser HtmlUnit.

Unlike in Selenium 1, where the Selenium server was necessary to run tests, Selenium WebDriver does not need a special server to execute tests.

Instead, the WebDriver directly starts a browser instance and controls it. However, Selenium Grid can be used with WebDriver to execute tests on remote systems see below. Where possible, WebDriver uses native operating system level functionality rather than browser-based JavaScript commands to drive the browser.

This bypasses problems with subtle differences between native and JavaScript commands, including security restrictions. As of early , Simon Stewart inventor of WebDriver , who was then with Google, and David Burns of Mozilla were negotiating with the W3C to make WebDriver an Internet standard.

In July , the working draft was released and the recommendation followed in June js , Python , Ruby , Java , Kotlin , and C. As of , Selenium 4 is a release candidate.

Selenium Grid is a server that allows tests to use web browser instances running on remote machines. With Selenium Grid, one server acts as the central hub. Tests contact the hub to obtain access to browser instances.

The hub has a list of servers that provide access to browser instances WebDriver nodes , and lets tests use these instances. Selenium Grid allows running tests in parallel on multiple machines and to manage different browser versions and browser configurations centrally instead of in each individual test.

The ability to run tests on remote browser instances is useful to spread the load of testing across several machines and to run tests in browsers running on different platforms or operating systems. The latter is particularly useful in cases where not all browsers to be used for testing can run on the same platform.

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from selenium import webdriver from selenium. by import By from selenium. keys import Keys from selenium.

ui import WebDriverWait from selenium. NAME , "q".

Simple, turn-key solution Selebium quickly author reliable end-to-end tests. Works out of the box for any Selenium app. Selehium easier test debugging with rich IDE L-carnitine and fertility like Se,enium breakpoints Sports nutrition supplements Selemium Selenium exceptions. Selenim started with Selenium IDE requires no additional setup other than installing the extension on your browser. One of our driving philosophies is to provide an easy to use tool that will give instant feedback. We believe that the easier we can make it, the more likely people are to author tests, which in turn results in better tested apps. Selenium IDE records multiple locators for each element it interacts with.

Selenium -

One of our driving philosophies is to provide an easy to use tool that will give instant feedback. We believe that the easier we can make it, the more likely people are to author tests, which in turn results in better tested apps.

Selenium IDE records multiple locators for each element it interacts with. If one locator fails during playback, the others will be tried until one is successful.

Through the use of the run command , you can re-use one test case inside of another e. Selenium IDE ships with an extensive control flow structure, with available commands like if , while and times. To learn more, check out the Control Flow documentation.

Selenium IDE can be extended through the use of plugins. They can introduce new commands to the IDE or integrate with a third-party service. Write your own or install one that someone else has already written. High doses of selenium supplements in pregnant animals might disturb the zinc:copper ratio and lead to zinc reduction; in such treatment cases, zinc levels should be monitored.

Further studies are needed to confirm these interactions. In the regions e. various regions within North America where low selenium soil levels lead to low concentrations in the plants, some animal species may be deficient unless selenium is supplemented with diet or injection.

In general, absorption of dietary selenium is lower in ruminants than other animals, and is lower from forages than from grain.

The effects of selenium intake on cancer have been studied in several clinical trials and epidemiologic studies in humans. Selenium may have a chemo-preventive role in cancer risk as an anti-oxidant , and it might trigger the immune response.

At low levels, it is used in the body to create anti-oxidant selenoproteins , at higher doses than normal it causes cell death.

Selenium in close interrelation with iodine plays a role in thyroid health. Selenium is a cofactor for the three thyroid hormone deiodinases , helping activate and then deactivate various thyroid hormones and their metabolites.

Isolated selenium deficiency is now being investigated for its role in induction autoimmune reactions in thyroid gland in Hashimoto's disease. Contents move to sidebar hide.

Article Talk. Read Edit View history. Tools Tools. What links here Related changes Upload file Special pages Permanent link Page information Cite this page Get shortened URL Download QR code Wikidata item.

Download as PDF Printable version. In other projects. Wikimedia Commons. This article is about the chemical element.

For the software testing framework, see Selenium software. Chemical element, symbol Se and atomic number view talk edit. Main article: Isotopes of selenium. See also: Category:Selenium compounds and organoselenium chemistry.

Main article: Organoselenium chemistry. See also: Category:Selenide minerals. Main article: Selenium in biology. Chemical compound. Main article: Evolution of dietary antioxidants. Main article: Selenium deficiency.

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Cyanide inhibition of 4-glutathioneselenoenzyme". Biochimica et Biophysica Acta BBA - Enzymology. Merck Veterinary Manual. February The American Journal of Clinical Nutrition. Selenium at Wikipedia's sister projects. Definitions from Wiktionary Media from Commons Textbooks from Wikibooks Resources from Wikiversity Data from Wikidata.

Periodic table. s-block f-block d-block p-block. Selenium compounds. SeBr 2 SeCl 2 SeS 2. Prostanoid signaling modulators. Agonists: Prostaglandin D 2 Treprostinil Antagonists: Asapiprant Laropiprant Vidupiprant. Agonists: Indometacin Prostaglandin D 2 Antagonists: ADC AZD Bay U Fevipiprant MK MK QAV Ramatroban Setipiprant Timapiprant TM Vidupiprant.

Agonists: Beraprost Enprostil Iloprost ciloprost Latanoprost Lubiprostone Misoprostol Prostaglandin E 1 alprostadil Prostaglandin E 2 dinoprostone Sulprostone Antagonists: AH ONO SC SC SC Agonists: Butaprost Misoprostol Prostaglandin E 1 alprostadil Prostaglandin E 2 dinoprostone Treprostinil Antagonists: AH PF TG Agonists: Beraprost Carbacyclin Cicaprost Enprostil Iloprost ciloprost Isocarbacyclin Latanoprost Misoprostol Prostaglandin D 2 Prostaglandin E 1 alprostadil Prostaglandin E 2 dinoprostone Remiprostol Ricinoleic acid Sulprostone Antagonists: L Agonists: Lubiprostone Misoprostol Prostaglandin E 1 alprostadil Prostaglandin E 2 dinoprostone TCS Antagonists: Grapiprant GW L ONO-AE Agonists: 16,Dimethyl Prostaglandin E 2 Aganepag Carboprost Evatanepag Gemeprost Nocloprost Omidenepag Prostaglandin F 2α dinoprost Simenepag Taprenepag.

Agonists: Alfaprostol Bimatoprost Carboprost Cloprostenol Enprostil Fluprostenol Latanoprost Prostaglandin D 2 Prostaglandin F 2α dinoprost Sulotroban Tafluprost Travoprost Unoprostone. Agonists: ACT AFP Beraprost BMY Carbacyclin Cicaprost Iloprost ciloprost Isocarbacyclin MRE NS Prostacyclin prostaglandin I 2 , epoprostenol Prostaglandin E 1 alprostadil Ralinepag Selexipag Taprostene TRA Treprostinil Antagonists: RO Agonists: Carbocyclic thromboxane A 2 I-BOP Thromboxane A 2 U Vapiprost Antagonists: HETE APA AA Argatroban Bay U BMS, Daltroban Domitroban EP GR ICI ICI Ifetroban Imitrodast L L Linotroban Mipitroban ONO ONO Picotamide Pinane thromboxane A 2 Ramatroban Ridogrel S Samixogrel Seratrodast SQ, SQ, Sulotroban Terbogrel Terutroban TRA Arbaprostil Ataprost Ciprostene Clinprost Cobiprostone Delprostenate Deprostil Dimoxaprost Doxaprost Ecraprost Eganoprost Enisoprost Eptaloprost Esuberaprost Etiproston Fenprostalene Flunoprost Froxiprost Lanproston Limaprost Luprostiol Meteneprost Mexiprostil Naxaprostene Nileprost Nocloprost Ornoprostil Oxoprostol Penprostene Pimilprost Piriprost Posaraprost Prostalene Rioprostil Rivenprost Rosaprostol Spiriprostil Tiaprost Tilsuprost Tiprostanide Trimoprostil Viprostol.

Retinoids Selenium selenium tetrachloride , sodium selenite , selenium disulfide.

Below is where you Selenum find the latest releases of all the Selenium Sekenium. You can also find a Seelnium of previous releases, source BCAA supplements for lean muscle mass, Selenoum additional Biofilm control for Maven users. In order to create scripts that interact with the Selenium Server Remote WebDriver or create local Selenium WebDriver scripts, you need to make use of language-specific client drivers. While language bindings for other languages existthese are the core ones that are supported by the main project hosted on GitHub. Stable: 4. API Docs.

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