| 单词 | trivalent |
| 例句 | The eradication campaign originally relied on a “trivalent” OPV against the three poliovirus types. Global polio eradication effort struggles with the end game 2023-09-18T04:00:00Z State officials hope the new rule will compel businesses to switch to trivalent chromium, a far less toxic alternative, which has been available as a substitute since the early 1990s. California air regulators vote to ban toxic chrome plating by 2039 2023-05-25T04:00:00Z Hexavalent chromium, for example, is a potent carcinogen that has no safe amount of exposure while trivalent chromium is considered much less toxic. A Bay Area city reels from refinery's hazardous fallout. Did warnings come too late? 2023-04-02T04:00:00Z “What is the trivalent vaccine? I have received the original Moderna vaccines plus boosters. Do I need a trivalent booster now? I am 75 and have several medical issues.” Opinion | The Checkup With Dr. Wen: What does it mean to hold China ‘accountable’ for covid? 2023-03-02T05:00:00Z The Air Resources Board hopes the proposed rule will encourage these facilities to switch to trivalent chromium, a far less toxic alternative, which has been available as a substitute since the early 1990s. California wants to ban the toxic chemical that gives chrome its classic shine 2023-01-26T05:00:00Z Over 2 weeks in April 2016, all countries stopped using trivalent OPV and replaced it with bivalent OPV, with the type 2 component removed—a trial run for the eventual cessation of all OPV. The polio eradication campaign is faltering. Can a new vaccine help it get back on track? 2020-11-10T05:00:00Z For California’s aerospace industry, trivalent chromium hasn’t been proved to meet Department of Defense specifications. California air regulators vote to ban toxic chrome plating by 2039 2023-05-25T04:00:00Z Some experts fervently hope to avoid reintroduction of the trivalent vaccine. Polio eradication program faces hard choices as endgame strategy fails 2019-12-30T05:00:00Z To my knowledge, there is no trivalent vaccine. Opinion | The Checkup With Dr. Wen: What does it mean to hold China ‘accountable’ for covid? 2023-03-02T05:00:00Z The chrome plating facilities that remain will incur significant costs to transition to trivalent chromium plating, which the air board estimates would be around $323,000 for decorative platers and $4 million for industrial platers. California wants to ban the toxic chemical that gives chrome its classic shine 2023-01-26T05:00:00Z Also available are three trivalent options, which contain three strains of influenza instead of four. Which flu shot should you get? Here’s what you need to know. 2018-12-14T05:00:00Z Both are currently offered only in trivalent formulations. What to Know About Getting a Flu Shot This Year, No Matter Who’s Paying 2018-11-15T05:00:00Z In April of that year, the 155 countries still using the trivalent vaccine, which targets all three polio variants, replaced it with a bivalent vaccine with the type 2 component removed. Polio outbreaks in Congo threaten global eradication 2018-07-02T04:00:00Z These vaccines protect against the same viruses as the trivalent vaccine and an additional B virus. In this deadly flu season, here are tips on how to protect yourself 2018-01-06T05:00:00Z Since the total occupancy of the PF6 counter-ions refined to a value close to 3, it was deemed appropriate to constrain this value to 3, assuming trivalent iron. A low-spin Fe(iii) complex with 100-ps ligand-to-metal charge transfer photoluminescence : Nature : Nature Research 2017-03-28T04:00:00Z If you’re 65 or older, however, the other trivalent options are probably your best bet. Which flu shot should you get? Here’s what you need to know. 2018-12-14T05:00:00Z “It is more beneficial to get covered with the trivalent vaccine, rather than wait or search for the quad,” said Dr. Frank Illuzzi, chief medical officer at CityMD, an urgent care chain. What to Know About Getting a Flu Shot This Year, No Matter Who’s Paying 2018-11-15T05:00:00Z In April, countries using the oral polio vaccine began to switch from a trivalent vaccine, which protects against all three types of polio, to a bivalent vaccine, which only protects against types 1 and 3. Century after 1st major US polio epidemic, eradication eyed 2016-06-25T04:00:00Z The new vaccine is bivalent instead of trivalent — that is, it contains vaccine against two polio strains, Type 1 and Type 3. For Polio Vaccines, a Worldwide Switch to New Version 2016-04-11T04:00:00Z DeConcini tells the Oregonian that the state is concerned because it is possible for trivalent chromium as a raw ingredient to result in hexavalent chromium emissions. Glass companies agree to stop using carcinogenic metal 2016-02-13T05:00:00Z The vaccine's approval is based on an international clinical trial of more than 7,000 people, aged 65 and older, who received either Fluad or Agriflu, another trivalent seasonal flu vaccine. FDA Approves First Flu Shot With Added Ingredient to Boost Immune Response 2015-11-25T05:00:00Z In 2009, after experts waited a decade to be sure that Type 2 was gone forever, they began removing that strain from the trivalent oral vaccine, which works against all three types. A Step Closer to the Defeat of Polio 2015-11-23T05:00:00Z The traditional flu vaccine is “trivalent,” meaning it’s formulated to protect against three strains of the virus. Influenza, a Familiar Virus, Requires Attention, Too 2014-10-30T04:00:00Z The quadrivalent vaccine protects against four types of flu, one more than the trivalent vaccine, Bernstein said. Pediatricians Urge Flu Vaccine for All Kids 6 Months and Older 2014-09-22T04:00:00Z But Bullseye Glass told the state it will continue using trivalent chromium, Nina DeConcini, an Oregon Department of Environmental Quality regional administrator, told the newspaper. Glass companies agree to stop using carcinogenic metal 2016-02-13T05:00:00Z Fluad is a trivalent vaccine, which means it is produced from three flu virus strains. FDA Approves First Flu Shot With Added Ingredient to Boost Immune Response 2015-11-25T05:00:00Z Usually, the vaccine given is trivalent, made from three inactivated viral strains. What do you need to know to survive this year s flu? 2014-01-08T18:45:05.636Z The flu shot itself is actually a trivalent vaccine, meaning that it protects against the three separate flu strains that experts believe are most likely to be circulating around the Northern Hemisphere this winter. New Swine Flu Virus Could Complicate Influenza Season 2011-12-30T12:05:30Z The adjective monovalent, divalent, trivalent, etc., is prefixed to an element to denote that the atom of this element combines with one, or two, or three, etc., atoms of hydrogen to form a compound molecule. Heroes of Science Chemists 2011-12-09T03:00:21.047Z Overall, the immune response induced by the bivalent vaccine was significantly higher than the trivalent vaccine and similar to the monovalent vaccine, the investigators found. New Polio Vaccine Shows Major Advantages: Study 2010-10-26T13:00:00Z Two influenza vaccines were recommended last year but only one trivalent vaccine is being made for the 2010-11 seasonal influenza vaccine schedule. Pediatric Group Issues New Flu Shot Guidelines 2010-08-30T13:00:00Z Influenza vaccines are trivalent, meaning they contain three different strains. WHO to decide new flu vaccine formula 2010-02-18T05:14:00Z The effectiveness of the various electrolytes in bringing about this change is proportional to their valency; bivalent ions are from 70 to 80 times, and trivalent ions about 600 times as effective as monovalent ions. The Chemistry of Plant Life Let us consider what is implied in this statement—"The nitrogen atom is trivalent." Heroes of Science Chemists 2011-12-09T03:00:21.047Z Group I.: the alkali metals Li, Na, K, Rb, Cs, and also Ag, monovalent; Cu, monovalent and divalent; Au, monovalent and trivalent. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" But if a divalent atom is in question the charge carried is double, and, similarly, a trivalent atom carries a triple charge. A History of Science, Volume 5(of 5) Aspects Of Recent Science In the one series, designated by the suffix "ous," the metal is divalent; in the other series, designated by the suffix "ic," the metal is trivalent. An Elementary Study of Chemistry The words monovalent, divalent, trivalent, tretrava-lent, etc., were coined to express this most important fact, and the various elements came to be known as monads, diads, triads, etc. A History of Science — Volume 4 When therefore we say that "the nitrogen atom is trivalent," we sum up a large amount of knowledge which has been gained by laborious experiment. Heroes of Science Chemists 2011-12-09T03:00:21.047Z Carbon was joined with silicon, zirconium and titanium, while boron, being trivalent, was relegated to another group. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" The trivalent metals, which in addition to aluminium include also iron and chromium, are sometimes called the earth metals. An Elementary Study of Chemistry Write the general formula of an alum, representing an atom of an alkali metal by X and an atom of a trivalent metal by Y. 6. An Elementary Study of Chemistry It can also act as a trivalent metal, and in this condition forms salts similar to those of aluminium. An Elementary Study of Chemistry Those compounds in which the iron is divalent are known as ferrous compounds, while those in which it is trivalent are known as ferric. An Elementary Study of Chemistry C, Si, Ge, Zr, Th, tetravalent; Ti, tetravalent and hexavalent; Sn, Pb, divalent and tetravalent; Ce, trivalent and tetravalent. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" A trivalent atom will combine with three atoms of a univalent element, as in the compound III III H3N. An Elementary Study of Chemistry Other trivalent sulphates besides aluminium sulphate can form similar compounds with the alkali sulphates, and these compounds are also called alums, though they contain no aluminium. An Elementary Study of Chemistry Thus the oxide of the trivalent metal aluminium has the formula Al2O3. An Elementary Study of Chemistry The elements of the family are ordinarily trivalent, so that the formulas for their compounds differ from those of the elements so far studied. An Elementary Study of Chemistry Group V.: N, trivalent and pentavalent, but divalent in nitric oxide; P, As, Sb, Bi, trivalent and pentavalent, the last being possibly divalent in BiO and BiCl2. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" |
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