| 单词 | chemical group |
| 例句 | The source said the new licence was required by law because a change had occurred at the Belgian chemical group's plant. Italian prosecutors ask to drop Solvay licence case against ex-minister 2023-08-22T04:00:00Z Nearly 30 chemicals or chemical groups were identified as contaminants to animals such as shellfish and worms that live near the river bottom. null 2023-05-01T04:00:00Z Ilham Kadri, chief executive of Belgian chemical group Solvay, said proximity to customers was key, adding she remained "very bullish" on Europe. Fears of European industry exodus to U.S. may be overdone 2023-03-03T05:00:00Z A sculpture depicting the logo of Belgian chemical group Solvay is seen at its headquarters in Brussels, Belgium, July 29, 2015. Solvay to cut waste discharged off Italy, ending tussle with activist 2022-09-06T04:00:00Z The phosphate may be modified by the addition of charged or polar chemical groups. Biology for AP Courses 2022-06-09T00:00:00Z Instead of trying to break this stable bond, Trang and her colleagues targeted a chemical group containing oxygen atoms at one end of the molecule. Cheap New Method Breaks Down ‘Forever Chemicals’ 2022-08-22T04:00:00Z Lipids have oily fatty chains that are attached to chemical groups that interact with water. Miller & Levine Biology 2018-01-01T00:00:00Z These chemical groups affect a hormone’s distribution, the type of receptors it binds to, and other aspects of its function. Anatomy and Physiology 2013-06-19T00:00:00Z For example, carfentanil, a fentanyl analog formed by substituting one chemical group for another, is 100 times more potent than its parent structure. What is fentanyl and why is it behind the deadly surge in overdoses? A medical toxicologist explains 2022-05-22T04:00:00Z The amino acid residues can provide certain ions or chemical groups that actually form covalent bonds with substrate molecules as a necessary step of the reaction process. Biology for AP Courses 2022-06-09T00:00:00Z The majority shareholder of chemical group Ineos made the late bid on Friday, weeks after the 18 March deadline for bids. Ratcliffe's Chelsea bid 'rejected out of hand' 2022-05-04T04:00:00Z Cells can regulate the state of chromatin by enzymes that attach chemical groups to DNA and to histone proteins. Miller & Levine Biology 2018-01-01T00:00:00Z Antigens, the small chemical groups often associated with pathogens, are recognized by receptors on the surface of B and T lymphocytes. Anatomy and Physiology 2013-06-19T00:00:00Z The logo of Swiss chemical group Sika is seen on barrels at the company's headquarters in Zurich, Switzerland October 7, 2021. Construction chemicals maker Sika annual profit jumps 27% 2022-02-18T05:00:00Z They may undergo cleavage or phosphorylation, or may require the addition of other chemical groups. Biology for AP Courses 2022-06-09T00:00:00Z Europe is already constrained by a scarcity of chemical groups capable of refining minerals into cathode materials, he added. Europe's EV battery strategy threatened by supply chain gaps, Eramet says 2021-10-29T04:00:00Z Logo of Swiss chemical group Sika is seen on a snow-covered roof of a branch in Berikon, Switzerland February 12, 2021. Sika confident it can handle raw material price rises 2021-10-07T04:00:00Z The new study analysed a second enzyme also found in the Japanese bacteria that doubles the speed of the breakdown of the chemical groups liberated by the first enzyme. New super-enzyme eats plastic bottles six times faster 2020-09-28T04:00:00Z Aromatic frameworks are therefore generally not made from scratch during organic synthesis, but instead are used as raw materials that are ‘decorated’ with other chemical groups. Reactions for making widely used aniline compounds break norms of synthesis 2020-08-04T04:00:00Z Together, these chemical groups constitute an energy powerhouse. Biology for AP Courses 2022-06-09T00:00:00Z The test they developed, called PanSeer, detects methylation patterns in which a chemical group is added to DNA to alter genetic activity. Experimental Blood Test Detects Cancer up to Four Years before Symptoms Appear 2020-07-21T04:00:00Z It carries two chemical groups that keep it inert until it reaches the tumor’s neighborhood. Revamped cancer drug starves tumors in mice 2019-11-07T05:00:00Z Distinctive chemical groups jutting from the Novichok molecules may allow them to bind to other enzymes—and perhaps trigger a long-lasting syndrome in victims who survive an attack. Poison used in recent attack on Russian spy may soon be banned 2019-10-23T04:00:00Z This opens the door to a highly efficient and general two-step method for converting primary amines — a common chemical group in organic molecules — into triazoles. Double-click enables synthesis of chemical libraries for drug discovery 2019-10-01T04:00:00Z One of the best-studied epigenetic changes is the addition to a DNA base of a methyl chemical group — made up of one carbon atom and three hydrogens — which often quells the activity of a gene. First portrait of mysterious Denisovans drawn from DNA 2019-09-18T04:00:00Z In medicinal chemistry, the chemical group known as the amide is king. Fluorinated compounds present opportunities for drug discovery 2019-09-03T04:00:00Z Spheres represent a variety of chemical groups; bonds shown in bold or as solid wedges project above the plane of the page; broken wedges project below the plane of the page. Holistic models of reaction selectivity 2019-07-16T04:00:00Z The best-known examples of this are cases in which metabolites provide substrates for enzymes that regulate gene expression by modifying chemical groups attached to DNA or to the histone proteins that bind to DNA. Metabolic signal curbs cancer-cell migration 2019-06-25T04:00:00Z The amino-acid side chains found in enzymes contain at most one chemical group, and are crucial for molecular recognition. Catalytic machinery of enzymes expanded 2019-05-26T04:00:00Z Although most blue flowers create pigments based on delphinidin, they vary the molecule by adding different chemical groups, and many of the intermediates in the chemical pathway leading to delphinidin are blue as well. Meet the blue crew, scientists trying to give food, flowers, and more a color rarely found in nature 2019-05-02T04:00:00Z He discovered that chemical groups called phosphates within cells trigger a cascade of chemical changes that amplify the dopamine signal. Paul Greengard, Nobel Prize-Winning Neuroscientist, Dies at 93 2019-04-14T04:00:00Z Having the ability to decorate structurally complex molecules with different chemical groups is particularly useful for synthesizing analogues of biologically active compounds in drug-discovery programmes8. Molecular-decoration technique offers boost to medicinal chemists 2019-03-12T04:00:00Z R within the enantiomers represents various chemical groups; the solid wedge and the broken wedge represent bonds that project above and below the plane of the page, respectively. An exciting tool for asymmetric synthesis 2018-12-11T05:00:00Z However, to realize the full power of an expanded range of catalytic chemical groups, substantial optimization is likely to be needed to generate catalytically efficient active sites. Catalytic machinery of enzymes expanded 2019-05-26T04:00:00Z Their idea was that the glucose would allow the flower's natural enzymes to attach further chemical groups to delphinidin, creating a stronger blue. Meet the blue crew, scientists trying to give food, flowers, and more a color rarely found in nature 2019-05-02T04:00:00Z Poskanzer collaborates with analytical chemist Roberto Etchenique at the University of Buenos Aires, to design ‘caged’ compounds, in which neurotransmitters bind reversibly to chemical groups that restrict their interactions with other molecules in the cell. Tapping into the brain’s star power 2018-10-30T04:00:00Z When a sample is exposed to different wavelengths of infrared radiation, how much light of each wavelength it absorbs indicates the kinds of chemical groups it contains. Powerful beams of infrared light could probe cells, diagnose diseases 2018-08-08T04:00:00Z They started by adding chemical groups to DNA’s four bases that act as “stop” signals. New technique could help scientists create a gene in just 1 day 2018-06-18T04:00:00Z The European Commission is attempting to corral automakers and chemical groups into creating a European leader in its field - citing Airbus in the aerospace sector as an example - that would invest in new regional production. Peugeot CEO backs calls for European battery champion 2018-03-28T04:00:00Z German chemical group BASF, automakers Renault and Daimler and engineering firm Siemens are among those invited to Wednesday’s gathering in Brussels. EU invites industry chiefs to plug into battery revolution 2017-10-03T04:00:00Z Normally, the liver detoxifies these treatments by adding a chemical group called glucuronidate. Gut bacteria can stop cancer drugs from working 2017-06-05T04:00:00Z Monsanto's rejection last month of Bayer's latest offer put pressure on the German healthcare and chemical group to increase it to at least get access to the company's books. Monsanto gives Bayer limited access to its books: sources 2016-08-17T04:00:00Z To design better desalination membranes, researchers will need to be able to predict how factors such as the distribution of charged chemical groups in a polymer affects its permeability to ions. The plastics revolution: how chemists are pushing polymers to new limits 2016-08-16T04:00:00Z It readily reacts in water—also thought to be plentiful at the time—to form one of a class of molecules called aminopyrimidines, which contain several chemical groups called amines. ‘RNA world’ inches closer to explaining origins of life 2016-05-12T04:00:00Z German chemical group BASF, automakers Renault and Daimler and engineering firm Siemens are among those invited to Wednesday’s gathering in Brussels. EU invites industry chiefs to plug into battery revolution 2017-10-03T04:00:00Z He also describes how the attachment of chemical groups called methyl groups to DNA can change gene activity. Researcher under fire for New Yorker epigenetics article 2016-05-08T04:00:00Z They varied everything from the length of individual molecular chains to the makeup of chemical groups called crosslinkers that bind separate chains to one another as the gel transforms into a thin polymer film. New ‘second skin’ could zap wrinkles, ease eczema 2016-05-09T04:00:00Z The monomers contained chemical groups that allowed them to connect only to the growing polymer, rather than reacting with each other randomly. The plastics revolution: how chemists are pushing polymers to new limits 2016-08-16T04:00:00Z From the business world, Germany's BASF, the world's largest chemical group by sales, said it would be difficult to meet technical "preconditions". EU climate change goal pits green business against industry 2014-10-24T04:00:00Z So it pulls atoms off here and sticks new chemical groups on there in an attempt to inactivate it. What happens to the drugs you flush down the toilet? 2014-08-08T04:00:00Z German industrial giants such as chemical group also depend heavily on Russian fuel. Germany's Merkel Gets Tough on Russia 2014-04-17T10:00:10Z What’s more, the three companies continued to refine their product, adding chemical groups that made the insulin absorb somewhat more quickly or evenly, for example. Even Small Medical Advances Can Mean Big Jumps in Bills 2014-04-05T20:27:21Z Mackenzie thinks that the transgene triggered an epigenetic change: it altered the plant’s gene expression by changing the pattern of chemical groups added to its DNA rather than changing the DNA sequence itself. US regulation misses some GM crops 2013-08-21T17:50:19.333Z The chemical group currently accounts for only 2 percent of greenhouse gases, but consumption is growing exponentially as people in developing countries grow wealthy enough to purchase air conditioners. President Obama and Chinese President Xi Jinping agree to wind down production and use of hydrofluorocarbons, or HFCs. 2013-06-09T00:29:24Z The helical molecule is famously held together by four chemical groups, or nucleobases, which, when arranged in a specific order, carry the genetic instructions needed by a living organism to build and maintain itself. DNA 'perfect for digital storage' 2013-01-23T18:03:09Z It is controlled by the chemical groups placed along the rod structure. Tiny machine apes production line 2013-01-11T11:40:55Z These descriptions include things like the number of atoms, the presence or absence of specific chemical groups, and the weight and shapes of the molecules. Smellspace and Olfactory White 2012-11-27T14:45:04.233Z Hirao and his colleagues found that they could reduce mispairing by designing shapes that fit awkwardly with natural bases, and by adding negatively charged or electron-rich chemical groups that repel the natural bases' corresponding parts. Chemical biology: DNA's new alphabet 2012-11-21T18:21:07.117Z They mapped the regions of the genome that were carpeted by methyl chemical groups, which generally indicate areas in which genes are silent. ENCODE: The human encyclopaedia 2012-09-05T17:20:34.310Z These markers are methyl, acetyl and other chemical groups that attach to the DNA, turning some genes off and others on. Stem Cells: Flexible friends 2012-02-29T18:21:27.080Z Carcinogenic VOCs EPA proposes to streamline the regulation of additional toxins by regulating chemical groups rather individual compounds. How To Protect Yourself From America's 'New' Drinking Water Toxins 2011-08-09T13:23:57Z Our chemical groups, our geological rocks and strata, our inorganic and organic kingdoms, our plants and animals, our classes, orders, genera, species, all are seen to be artificial. The Gospel Of Evolution From "The Atheistic Platform", Twelve Lectures 2011-05-31T02:00:36.420Z Differently coloured circles represent different chemical groups. b, Using diversity-oriented synthesis, libraries of structurally diverse, drug-like compounds are made as efficiently as possible, typically from common intermediates. Drug discovery: A question of library design 2011-02-02T18:21:33.553Z "These data really show us that there is biological plausibility to some of these or all of these chemical groups," Gallo said. Evidence suggests role for chemicals in diabetes 2011-01-14T03:59:57Z This arrangement of the colouring matters in natural chemical groups is well suited for the requirements of the chemist, but another classification is that based on the mode of their application in dyeing. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 8 "Dubner" to "Dyeing" 2010-12-26T03:00:17.840Z Sinochem, the Chinese-state owned chemical group, said on Friday it would "pay close attention" to the bid and added that it was "interested in overseas potash investment opportunities". BHP Billiton's bid for Potash Corp is timely as fertiliser market grows fast 2010-08-21T23:04:00Z The azodyes form one of the largest groups of dyes, and derive their name from the presence of the characteristic chemical group —N = N—, known as the azo group. The New Gresham Encyclopedia. Vol. 1 Part 3 Atrebates to Bedlis They have no such uniformity in composition as is exhibited by the oils which are included among the fats and waxes; but belong to several widely different chemical groups. The Chemistry of Plant Life Nutrient.—One of several chemical groups to which the essential constituents of food belong. American Red Cross Text-Book on Home Hygiene and Care of the Sick The energy produced by the reactions of some organic chemical groups are, therefore, of a more complicated character and of another dimension. Manhood of Humanity. I desire now to call attention to chemical groups under the apetalous plants having simplicity of floral elements. Scientific American Supplement, No. 623, December 10, 1887 We belong to the chemical group of the intellectual levels, being born of sires who were great chemists, born of great chemists for many generations. City of Endless Night Do you consider it safe to mix inks without knowing to what chemical group the inks so mixed belong?' Forty Centuries of Ink or, a chronological narrative concerning ink and its backgrounds, introducing incidental observations and deductions, parallels of time and color phenomena, bibliography, chemistry, poetical effusions, citations, anecdotes and curiosa together with some evidence respecting the evanescent character of most inks of to-day and an epitome of chemico-legal ink. |
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