2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Molybdenum yog cov khoom siv tshuaj nrog lub cim Mo thiab tus lej atomic 42. Lub npe yog los ntawm Neo-Latin molybdaenum, uas yog raws li Ancient Greek Μόλυβδος molybdos, lub ntsiab lus txhuas, vim nws cov ores tsis meej pem nrog cov hlau lead.
Yuav nrhiav tau molybdenum li cas?
Molybdenum tau tshawb pom los ntawm Carl Welhelm Scheele, Swedish chemist, hauv 1778 hauv cov ntxhia hu ua molybdenite (MoS 2) uas tau tsis meej pem raws li ib tug lead compound. Molybdenum raug cais tawm los ntawm Peter Jacob Hjelm hauv xyoo 1781. … Molybdenum kuj tau txais los ua cov khoom lag luam mining thiab ua cov tungsten thiab tooj liab.
Leej twg nrhiav tau molybdenum 42?
Qhov no yog 2,000 degrees siab tshaj qhov melting point ntawm hlau, thiab 1,000 degrees siab tshaj qhov melting kub ntawm feem ntau pob zeb. Molybdenum tau tshawb pom los ntawm Carl Wilhelm Scheele hauv xyoo 1778, thiab raug cais thiab muab npe los ntawm Peter Jacob Hjelm hauv xyoo 1781.
Molybdenum tau txais nws lub npe nyob qhov twg?
Raws li Scheele qhov kev xav, Peter Jacob Hjelm, lwm tus kws tshuaj Swedish, tau ua tiav cov hlau (1782) thiab muab nws lub npe molybdenum, los ntawm Greek molybdos, "lead." Lub sij hawm lub sij hawm yog ua los ntawm 118 yam.
Puas molybdenum puas tsim kev puas tsuaj rau tib neeg?
Molybdenum toxicity tsis tshua muaj thiab kev tshawb fawb hauv tib neeg muaj tsawg. Txawm li cas los xij, hauv cov tsiaj, qib siab heev tau txuas rau kev txo qis kev loj hlob, lub raum tsis ua haujlwm, muaj menyuam tsis taus thiab raws plab (19). Muaj qee zaus,cov tshuaj molybdenum tau ua rau muaj kev phiv loj heev rau tib neeg, txawm tias cov koob tshuaj tau zoo nyob hauv UL.
Pom zoo:
Thaum twg dystrophic epidermolysis bullosa nrhiav tau?
Epidermolysis bullosa tau pom thawj zaug hauv lig 1800s. Nws yog ib tug tswv cuab ntawm tsev neeg ntawm cov kab mob hu ua blistering disease. Puas yog dystrophic epidermolysis bullosa ib yam kab mob tsawg? Epidermolysis bullosa acquisita (ib daim ntawv tau txais ntawm EB) yog ib yam tsis tshua muaj autoimmune tsis meej thiab tsis tau txais txiaj ntsig.
Thaum twg nrhiav tau dysarthria?
Early in 1969 , Darley et al. txhais tau tias dysarthria yog ib lo lus sib sau ua ke rau kev hais lus tsis zoo. Kev faib tawm ntawm dysarthria suav nrog flaccid dysarthria, spastic dysarthria, ataxic dysarthria, hypokinetic dysarthria, hyperkinetic hyperkinetic Hyperkinesia yog ib lub xeev ntawm kev ntxhov siab ntau dhauuas muaj ntau yam kab mob uas cuam tshuam rau lub peev xwm.
Thaum twg tarrytown nrhiav tau?
Ib lub zos nrog tob Dutch cov hauv paus hniav, Tarrytown tau teeb tsa los ntawm Europeans hauv 1640, thiab koom ua ke hauv 1870. Thaum pw tsaug zog Hollow nrhiav tau? Keeb Kwm Ib zaug ib feem ntawm cov cuab yeej cuab tam ntawm tus tub lag luam Frederick Philipse, nws tau koom ua North Tarrytown hauv 1874, plaub xyoos tom qab kev koom ua ke ntawm Tarrytown.
Thaum twg tau txais kev pom zoo nrhiav tau?
In 2009, peb tus tsim thiab CEO Steve Marshall tau txheeb xyuas lub sijhawm hauv kev lag luam pov hwm lub neej thiab Reassured tau tsim. Peb pab tsev neeg tiv thaiv qhov tseem ceeb tshaj plaws rau lawv; Peb Lub Hom Phiaj rau 2020 yog los tiv thaiv ntau dua 200,000 tsev neeg hauv tebchaws Askiv.
Puas nrhiav tau lossis nrhiav tau?
Yog li, koj yuav tsum tau siv "could find". Lub modal verb, tau yog twb nyob rau hauv nws paste-form: ua. Yog li koj tsis tas yuav hloov pauv los nrhiav. Yuav nrhiav tau lossis nrhiav tau? "Ntaus" yog sib npaug. "
