Definition of test tube in English:

test tube


  • 1A thin glass tube closed at one end, used to hold small amounts of material for laboratory testing or experiments.

    • ‘The second assumption is that reaction mechanisms themselves are equivalent to those observed in the test tube.’
    • ‘Other carbonates won't fizz unless their powder is heated in a test tube with HC1.’
    • ‘When the reaction was complete, the catalyst congealed into a sticky solid and settled to the bottom of the test tube.’
    • ‘Just because conception takes place in a laboratory test tube, it is no less emotionally fraught for the couple concerned and no less morally taxing for the rest of us.’
    • ‘A nurse comes over and takes a blood sample by pricking the baby's finger with a needle and squeezing blood into a test tube.’
    • ‘Rather shakily she recorded the results, then carefully labeled the test tube with the name of her new chemical.’
    • ‘One test tube with 2 mL assay solution without root tissue was used as a control.’
    • ‘The collected volume of sap was determined by measuring the difference in weight of the test tube, before and after collection of the exuding sap.’
    • ‘When the investigators treated the cells in a test tube by restoring normal acidity, the bacteria no longer could adhere.’
    • ‘The researchers have also used an enzyme called polymerase to make exact copies of the DNA strands in a test tube.’
    • ‘The lipid was deposited as a film on the wall of a glass test tube by solvent evaporation under nitrogen.’
    • ‘I pulled back in surprise, then set the hot test tube in its rack.’
    • ‘The medical method of choosing a baby's gender is to undergo fertility treatment, in which the egg and sperm are mixed in a test tube.’
    • ‘We can make micro-organisms evolve very quickly in a test tube, by applying an appropriate selective pressure like an antibody.’
    • ‘Besides studying fibrils in the test tube, researchers would like to make computer models to view fibril formation.’
    • ‘Modern cosmetics are packed with chemicals more at home in a test tube than on our faces.’
    • ‘The girl, 14 at the time of the incident in May 1996, was injured when a test tube of ethanol boiled over during a chemistry class.’
    • ‘To capture the raindrops efficiently, you must now tip the test tube to the angle that matches the rain streaks on the windows.’
    • ‘To test if the starch has been converted to sugars, half fill a test tube with the liquid and add 1 or 2 drops of tincture of iodine.’
    • ‘Nonhomogenized connective tissue was removed from the test tube and discarded.’
    1. 1.1[as modifier]Denoting things produced or processes performed in a laboratory.
      ‘new forms of test-tube life’
      • ‘In the test-tube part of the study, the oregano oil completely stopped or prevented the growth of candida - by up to 75 percent.’
      • ‘After four or five days in space, the sperm will be returned to Earth where it will used to make test-tube piglets.’
      • ‘In the January Chemical Research in Toxicology, Fukuhara's group describes test-tube experiments showing that even at high concentrations, the synthetic catechin remains an antioxidant.’
      • ‘Compounds in cat's claw called pentacyclic alkaloids have been shown in test-tube studies to have anti-viral, anti-inflammatory and detoxification properties.’
      • ‘Adorability notwithstanding, the test-tube koalas are by-products of a project to establish the use of long-shelf-life koala sperm as a means of shoring up vulnerable populations.’
      • ‘In test-tube studies, the enzyme can destroy flagellin whether it's part of a bacterium's flagella or just free-floating in a solution.’
      • ‘These test-tube experiments revealed that trehalose - a sugar naturally made by organisms including yeast, bacteria, and insects - inhibits the aggregation.’
      • ‘There is, admits Alison, still a stigma attached to test-tube babes: ‘People just look at you differently when you have gone through this.’’
      • ‘Folkman and the other members of the research team quickly came up with a long-term blood-storage solution, but in working on the problem he discovered that tumor cells that grew in mice did not grow in a test-tube culture.’
      • ‘After a six-month immigration battle, test-tube twins born to their maternal grandmother in Gujarat have been allowed to enter Britain to be re-united with their genetic parents.’
      • ‘Science, when it involves the real world and not some artificially controlled test-tube environment, is absolutely packed with uncertainties, and there are always opposing views - sometimes more than two.’
      • ‘By doing so, scientists can create experiments in silico, using the computer rather than traditional test-tube methods known as the ‘wet’ lab approach.’
      • ‘In test-tube experiments, scientists studied the effect of serotonin on Burkitt's lymphoma, a cancer of the immune system.’
      • ‘The scientists then used test-tube experiments to show the virus could infect T cells under laboratory conditions.’
      • ‘During test-tube studies at Showa University in Tokyo, published in the Archives of Dermatological Research, a major component of green tea, EGCg, seemed to neutralize the effects of a toxin thought to trigger eczema.’
      • ‘Animal and test-tube studies have long suggested that damage caused by oxidation leads to cataracts and macular degeneration.’
      • ‘Although many studies involving quercetin are still in the test-tube phase, onions are still a good source of vitamins and minerals.’
      • ‘Even the lead researcher of the Science study, Ian Blair, Ph.D., professor at the University of Pennsylvania in Philadelphia, has said his test-tube results are preliminary and cannot be applied to humans.’
      • ‘‘We are still at the test-tube stage and chemical agents used would not be suitable for human use,’ he said.’
      • ‘But it's not clear whether the study's test-tube measure - the Oxygen Radical Absorbance Capacity, or ORAC - reflects what happens in the body.’


test tube