Ib tug thawj stain (malachite ntsuab) yog siv los stain lub endospores. Vim hais tias endospores tiv taus staining, malachite ntsuab yuav raug yuam mus rau hauv (piv txwv li, malachite ntsuab permeate lub phab ntsa spores) endospores los ntawm cua sov. vim cov laj thawj no, malachite ntsuab yaug yooj yim los ntawm cov noob qoob loo.)
Thaum lub sij hawm them nyiaj ntawm glycolysis, plaub pawg phosphate raug xa mus rau ADP los ntawm substrate-theem phosphorylation los ua plaub ATP, thiab ob NADH yog tsim thaum cov pyruvate oxidized
Malawi, Chile, thiab Nyab Laj yog cov piv txwv ntawm cov xeev elongated. Cov xeev muaj kev cuam tshuam tshwm sim thaum lub xeev compact muaj ib feem ntawm nws tus ciam teb nthuav tawm sab nraud ntau tshaj li lwm qhov ntawm thaj tsam
Metamorphic pob zeb
Txoj Cai Thib Ob ntawm Thermodynamics hais tias lub xeev ntawm entropy ntawm tag nrho lub ntiaj teb, raws li ib qho kev sib cais, yuav ib txwm nce ntxiv nyob rau lub sijhawm. Txoj cai thib ob kuj tau hais tias qhov kev hloov pauv ntawm entropy hauv lub qab ntuj khwb yeej tsis muaj qhov tsis zoo
Kev txhim kho dej zoo, tswj dej nyab, tsiaj qus thiab chaw nuv ntses, thiab kev ua si tsuas yog qee qhov txiaj ntsig kev lag luam uas cov av ntub dej muab. Cov av ntub dej yog ib qho tseem ceeb, tab sis feem ntau saib tsis taus, kev pab. Ua kom lawv noj qab nyob zoo yog qhov tseem ceeb los tswj cov dej huv thiab txhawb cov tsiaj qus thiab ntses
Lub tswv yim Arrhenius acid-base cais cov khoom ua kua qaub yog tias nws tsim hydrogen ions H (+) lossis hydronium ions hauv dej. Ib yam khoom raug cais raws li lub hauv paus yog tias nws tsim hydroxide ions OH (-) hauv dej. Lwm txoj hauv kev ntawm kev faib cov tshuaj raws li cov kua qaub lossis cov hauv paus yog lub tswv yim Bronsted-Lowry thiab Lewis lub tswv yim
Kev taw qhia rau Thawj Tswj Hwm Tsob Ntoo: Kom mus rau ntawm txoj kev taug kev, ua raws cov cim qhia rau General Sherman Tsob Ntoo. Lub taub hau sab qaum teb ntawm Generals Txoj Kev Loj los ntawm Giant Forest Museum. Tom qab koj tuaj txog, koj tuaj yeem taug kev mus rau General Sherman, uas feem ntau muaj neeg coob heev vim nws yog tsob ntoo loj tshaj plaws hauv ntiaj teb
Yooj Yim Pendulum. Ib qho yooj yim pendulum muaj ib tug loj m dai los ntawm ib txoj hlua ntawm qhov ntev L thiab tsau ntawm ib qho pivot point P. Thaum tsiv mus rau lub kaum sab xis pib thiab tso tawm, lub pendulum yuav viav vias rov qab mus rau lub sijhawm txav mus los
Yog tsis muaj ntsev choj, cov tshuaj nyob rau hauv lub anode compartment yuav ua tau zoo them thiab cov tshuaj nyob rau hauv lub cathode compartment yuav ua tsis zoo nqi, vim hais tias ntawm tus nqi imbalance, lub electrode cov tshuaj tiv thaiv yuav sai sai los mus rau ib tug nres, yog li ntawd nws yuav pab kom tswj tau qhov khiav. los ntawm electrons
Qhov zoo tshaj plaws voltmeter yog lub tswv yim theoretical ntawm lub voltmeter uas tsis cuam tshuam rau hauv Circuit Court, vim hais tias tam sim no mus rau qhov zoo tagnrho voltmeter yog xoom. Raws li Ohms txoj cai, sab hauv impedance ntawm lub zoo tagnrho voltmeter yuav tsum tau infinite. Niaj hnub nimno Digital voltmeter muaj qhov siab heev sab hauv impedance
Homeotic gene, ib pawg ntawm cov noob uas tswj cov qauv ntawm lub cev tsim thaum ntxov embryonic kev loj hlob ntawm cov kab mob. Cov noob no encode cov proteins hu ua transcription yam uas coj cov hlwb los tsim ntau yam ntawm lub cev
Qhov kev kuaj ames siv cov kab mob. kuaj cov nyhuv mutagenic ntawm qee yam khoom. Tso cai rau. yooj yim soj ntsuam thiab saib xyuas cov noob qhia thiab hloov pauv tus nqi. Cov tshuaj muaj peev xwm hloov cov kab mob DNA
Golgi txoj kev yog cov txheej txheem nyiaj staining uas yog siv los pom cov ntaub so ntswg hauv qab lub teeb pom kev zoo. Txoj kev tau tshawb pom los ntawm Camillo Golgi, tus kws kho mob Italian thiab kws tshawb fawb, uas tau luam tawm thawj daim duab ua nrog cov txheej txheem hauv xyoo 1873
(Nyob deb Postulate) Rau txhua khub ntawm cov ntsiab lus sib txawv muaj sib xws tus lej zoo. Tus lej no hu ua qhov kev ncua deb ntawm ob lub ntsiab lus
Ib lub pob yog ib qho taw tes raws li lub nthwv dej uas lub nthwv dej muaj qhov tsawg kawg nkaus amplitude. Piv txwv li, hauv ib txoj hlua vibrating guitar, qhov kawg ntawm txoj hlua yog cov nodes. Qhov ntxeev ntawm ib lub node yog ib qho kev tiv thaiv ntawm qhov taw tes, qhov chaw uas lub amplitude ntawm sawv nthwv dej yog qhov siab tshaj plaws. Cov no tshwm sim nruab nrab ntawm cov nodes
Tib neeg lub hlwb tsis muaj cov phab ntsa ntawm tes lossis Peptidoglycan (PDG). Cov hlwb tuaj yeem coj cov xim stain. Ib qho ntawm koj cov neeg koom tes hauv chav kuaj tau ua raws li cov txheej txheem pom zoo ntawm kev khiav Gram-positive thiab Gram-negative tswj kab mob ntawm nws Gram stain ntawm ib hom tsis paub
Elastic muaj peev xwm lub zog yog lub zog muaj peev xwm khaws cia los ntawm ncab lossis compressing ib qho khoom elastic los ntawm lwm lub zog xws li ncab ntawm lub caij nplooj ntoos hlav. Nws yog sib npaug rau txoj haujlwm ua kom ncab lub caij nplooj ntoos hlav uas nyob ntawm lub caij nplooj ntoos hlav tas li k thiab qhov kev ncua deb
Cov txheej txheem ua rau plaub tus ntxhais lub hlwb uas yog haploid, uas txhais tau hais tias lawv muaj ib nrab ntawm cov chromosomes ntawm diploid niam txiv cell. Meiosis muaj ob qho tib si zoo sib xws thiab qhov sib txawv ntawm mitosis, uas yog cov txheej txheem ntawm tes faib ua niam txiv cell tsim ob lub hlwb zoo tib yam
Piv txwv. Stirring qab zib rau hauv dej yog ib qho piv txwv ntawm kev yaj. Cov piam thaj yog cov kua, hos cov dej yog cov kuab tshuaj. Dissolving ntsev nyob rau hauv dej yog ib qho piv txwv ntawm dissolution ntawm ib tug ionic compound
Daim Npav Lub Sijhawm Thaum cov kua qaub reacts cov tebchaw twg tsim? Txhais lus ntsev thiab dej Lub sij hawm muaj pes tsawg hydrogen ions muaj nyob rau hauv ib liter dej? txhais tsis muaj; Lawv tag nrho cov hydrated Term Dab tsi yog qhov concentration ntawm hydronium ions nyob rau hauv ib tug nruab nrab tov? Lus Txhais 10^-7 M
Npe. Lub ntsiab txhais ntawm ib tug transcription yog ib yam dab tsi tag nrho sau tawm, los yog tus txheej txheem ntawm tag nrho sau ib yam dab tsi tawm. Ib qho piv txwv ntawm kev sau ntawv yog ib tus neeg sau lawv cov lus piav qhia ua tiav thiab lub luag haujlwm. YourDictionary txhais thiab siv piv txwv
Qhov av qeeg tseem ceeb kawg hauv New Jersey yog thaum Lub Yim Hli 23, 2011. Qhov av qeeg tau tshwm sim hauv Central Virginia, nrog qhov loj ntawm 5.8
Cov yam ntxwv ntawm Alkali Metals Pom nyob rau hauv kem 1A ntawm lub sijhawm teem sijhawm. Muaj ib tug electron nyob rau hauv lawv txheej txheej ntawm electrons. Yooj yim ionized. Silvery, mos, thiab tsis ntom. Tsawg melting ntsiab lus. Zoo kawg nkaus reactive
Thaum twg lub particle txav mus rau sab laug, sab xis, thiab nres? Thaum qhov nrawm, lossis qhov sib piv ntawm koj txoj haujlwm, tsis zoo, nws txav mus rau sab laug. Thaum qhov nrawm (derivative) yog qhov zoo, nws txav mus rau sab xis. Thaum lub nrawm sib npaug rau xoom, nws nres
Qhov txaus ntshai tiag tiag yog Hnub Ci Superstorms uas muaj lub hnub ci hluav taws xob muaj zog (lossis Coronal Mass Ejections) uas tuaj yeem cuam tshuam rau txhua yam khoom siv hluav taws xob hauv ntiaj teb. Yog tias nws muaj zog txaus los ua txhaum lub ntiaj teb cov hlau nplaum, ces EMR tuaj yeem cuam tshuam cov satellites thiab xov tooj cua sib txuas lus
Etymology: los ntawm Fabkis oxygène 'oxygen,'literally, 'acid producer,' los ntawm oxy- 'ntse, acid' (los ntawm Greekoxys 'ntse, qaub') thiab -gène 'ib qho uas tsim cov orgenerates' (los ntawm Greek -gen s 'yug , generated')
rau Ib yam li ntawd, nws yog nug, dab tsi nyob hauv tsev neeg alkali? Thawj kem ntawm lub rooj zaum yog hu ua pawg ib. Nws kuj tshwm sim hu ua tus alkali hlau tsev neeg . Cov tswv cuab ntawm no muaj koob meej tsev neeg yog lithium (Li), sodium (Na), poov tshuaj (K), rubidium (Rb), cesium (Cs), thiab francium (Fr).
Rotational kinetic zog tuaj yeem qhia tau tias: Erotational = 12I ω 2 E rotational = 1 2 I ω 2 qhov twg ω yog lub angular tshaj tawm thiab kuv yog lub sijhawm ntawm inertia nyob ib ncig ntawm lub axis ntawm kev sib hloov. Lub tshuab ua hauj lwm siv thaum lub sij hawm tig yog lub sij hawm torque lub kaum sab xis: W =τθ W = τ θ
Txhais: Tus lej 'nruab nrab'; pom byadding tag nrho cov ntaub ntawv cov ntsiab lus thiab faib los ntawm tus naj npawb ntawm cov ntaub ntawv cov ntsiab lus. Piv txwv li: Qhov nruab nrab ntawm 4, 1, thiab 7 yog (4 + 1 + 7) / 3 = 12 / 3 = 4 (4 + 1 + 7) / 3 = 12/3 = 4 (4+1+7)/3=12/3=4 laug parenthesis, 4, plus, 1, plus, 7, right parenthesis, slash, 3, equals, 12, slash, 3, sib npaug, 4
Thaum lub hydrate ntsev yog rhuab, cov qauv siv lead ua ntawm cov compound yuav hloov. Ntau hydrates muab loj, zoo tsim muaju. Lawv tuaj yeem tawg thiab tsim cov hmoov raws li cov dej ntawm cov dej ntws tawm. Cov xim ntawm cov khoom sib xyaw kuj tseem tuaj yeem hloov pauv
Ib yam khoom muaj peev xwm nce tus nqi ntawm cov tshuaj tiv thaiv tsis tau nws tus kheej tau noj lossis hloov los ntawm cov tshuaj reacting yog hu ua catalyst. Qhov kev txiav txim ntawm acatalyst yog hu ua catalysis. Catalysts yog siv bychemists kom ceev cov tshuaj tiv thaiv uas txwv tsis pub yuav qeeb qeeb
Lub peev xwm xa xov sai thiab ua tau zoo ua rau cov hlwb sib koom tes thiab kho lawv cov haujlwm. Lub peev xwm ntawm cov hlwb sib txuas lus los ntawm cov teeb liab tshuaj tshwm sim hauv ib lub hlwb thiab yog qhov tseem ceeb rau kev hloov pauv ntawm cov kab mob ntau yam kab mob
Peb cov lus qhia cleavage: yog lawv sib tshuam ntawm 90˚ = cubic cleavage; yog cov ces kaum tsis yog 90˚ = rhombohedral. Minerals nrog 4 lossis 6 cleavages tsis yog ntau. Plaub lub dav hlau cleavage tuaj yeem tsim 8-sided duab = octahedral cleavage (piv txwv li, fluorite)
Raws li verbs qhov txawv ntawm nto thiab dav hlau yog qhov saum npoo yog muab ib yam dab tsi nrog ib tug nto thaum lub dav hlau yog du (ntoo) nrog lub dav hlau los yog dav hlau yuav ua tau (nautical) txav mus rau hauv ib txoj kev uas nqa tus hneev ntawm lub nkoj tawm ntawm dej
Kev tuag yog sai, qee zaum tam sim. H2S qib ntawm 100 ppm thiab siab dua yog suav tias yog tam sim ntawd txaus ntshai rau lub neej thiab kev noj qab haus huv (IDLH). Dhau li ntawm nws cov khoom tsis zoo ceeb toom, H2S yog qhov txaus ntshai heev vim tias qib uas tuaj yeem tua tau qis dua li ntawm ntau lwm cov pa phem
Igneous pob zeb kuj paub los ntawm lub npe plutonic thiab volcanic pob zeb. Plutonic pob zeb yog lwm lub npe rau intrusive igneous pob zeb
Lub nraub qaum ntawm tus lej tshiab no yog qhov xav txog chav tsev, lossis tus lej i. Cov cuab yeej thib ob qhia peb tias tus lej kuv yog qhov tseeb rau kev sib npaug x 2 = − 1 x^2=-1 x²=− 1 x² = 1
Zhang Heng (78-139 CE) yog Suav astronomer thiab inventor. Nws yog tus thawj astronomer nyob rau hauv lub tsev hais plaub ntawm Tuam Tshoj Emperor thiab mapped lub hnub qub thiab ntiaj chaw. Nws raug lees paub tias lub hli tsis yog lub teeb ci, tab sis xav txog lub teeb ntawm Lub Hnub, qhov kev tawm tswv yim tsis sib haum thaum lub sijhawm