Txhawm rau sau cov qauv rau cov tebchaw uas muaj polyatomic ions, sau lub cim rau cov hlau ion ua raws li cov qauv rau polyatomic ion thiab sib npaug cov nqi. Txhawm rau sau npe ib qho chaw uas muaj polyatomic ion, hais cov cation ua ntej thiab tom qab ntawd cov anion
Tus ntoo khaub lig dihybrid yog tus ntoo khaub lig ntawm ob tus neeg uas yog ob qho tib si heterozygous rau ob qhov sib txawv. Ua piv txwv, cia peb saib cov txiv laum huab xeeb thiab hais tias ob qhov sib txawv peb tab tom tshuaj xyuas yog xim thiab qhov siab. Ib qho tseem ceeb allele H rau qhov siab thiab ib qho recessive allele h, uas ua rau ib tug dwarf pea cog
Txhua lub plhaub muaj peev xwm tsuas muaj tus naj npawb ruaj khov ntawm cov hluav taws xob: Thawj lub plhaub tuaj yeem tuav tau txog li ob lub tshuab hluav taws xob, lub plhaub thib ob tuaj yeem tuav tau txog yim (2 + 6) electrons, lub plhaub thib peb tuaj yeem tuav tau txog 18 (2 + 6 + 10). ) thiab lwm yam. Cov qauv dav dav yog tias lub plhaub nth tuaj yeem tuav txog 2 (n2) electrons
Txoj haujlwm uas ua ke nrog DNA thev naus laus zis thiab kev ua liaj ua teb yog Agricultural Biotechnology (Agritech)
Thawj peb lub hlis twg thiab peb lub hlis twg lub hli (ob qho tib si feem ntau hu ua 'ib nrab hli'), tshwm sim thaum lub hli nyob ntawm 90 degree kaum rau lub ntiaj teb thiab lub hnub. Yog li peb pom raws nraim ib nrab ntawm lub hli illuminated thiab ib nrab nyob rau hauv duab ntxoov ntxoo. Lo lus crescent hais txog cov theem uas lub hli tsawg dua ib nrab illuminated
Infrared telescopes tuaj yeem kuaj pom cov khoom txias dhau --- thiab yog li ntawd dhau lawm faint --- yuav tsum tau pom nyob rau hauv pom lub teeb, xws li cov ntiaj chaw, ib co nebulae thiab cov hnub qub xim av dwarf. Tsis tas li ntawd, cov hluav taws xob infrared muaj lub wavelengths ntev dua li pom lub teeb, uas txhais tau hais tias nws tuaj yeem dhau los ntawm cov pa roj thiab hmoov av tsis tau tawg
Homeostasis yog kev saib xyuas ntawm ib puag ncig ruaj khov. Homeostasis yog ib lo lus uas tau tsim los piav qhia txog lub cev thiab tshuaj lom neeg uas lub cev yuav tsum tswj kom muaj kev ua haujlwm zoo ntawm nws cov hlwb, cov ntaub so ntswg, lub cev, thiab lub cev
Ib Daim Ntawv Teev Npe Chemistry Apparatus Safety tsom iav thiab khoom siv kev nyab xeeb. Beakers. Erlenmeyer flasks, AKA conical flasks. Florence flasks, AKA boiling flasks. Test tubes, ntiv tes, thiab racks. Saib tsom iav. Crucibles. Funnels
Ib qho beta particle yog li 8,000 npaug me dua li alpha particle - thiab qhov ntawd yog qhov ua rau lawv txaus ntshai. Lawv qhov me me tso cai rau lawv nkag mus rau khaub ncaws thiab tawv nqaij. Kev raug sab nraud tuaj yeem ua rau kub hnyiab thiab cov ntaub so ntswg puas, nrog rau lwm cov tsos mob ntawm kev mob hluav taws xob
Nuclear fission yog txheej txheem hauv nuclear physics nyob rau hauv uas lub nucleus ntawm ib lub atom splits rau hauv ob los yog ntau dua nuclei me me raws li fission khoom, thiab feem ntau yog ib co by-product hais. Nuclear fission tsim lub zog rau lub zog nuclear thiab tsav kev tawg ntawm riam phom nuclear
Numeric expressions siv cov haujlwm rau cov lej. Piv txwv li, 2 (3 + 8) yog tus lej qhia. Algebraic kab lus muaj tsawg kawg yog ib qho sib txawv thiab tsawg kawg yog ib qho kev ua haujlwm (ntxiv, rho tawm, sib npaug, faib). Piv txwv li, 2 (x + 8y) yog ib qho kev qhia algebraic
Hauv cyclic photophosphorylation 2 ATP molecules raug tsim
Kev suav cov tshuaj formula Base Formula (DNA) Formula (RNA) G C10H12O6N5P C10H12O7N5P C C9H12O6N3P C9H12O7N3P T C10H13O7N2P (C10H13O8N2P) U(C91H)
Cov mis mos molecular rau sulfate yog SO42-. Plaub daim ntawv cog lus, ob qho tib si thiab ob ob, yog sib koom ntawm cov sulfur thiab oxygen atoms. Qhov -2 koj pom ntawm sulfate ion ua rau koj nco ntsoov tias cov molecule no raug them. Cov nqi tsis zoo no yog los ntawm cov pa oxygen atoms uas nyob ib puag ncig cov sulfur atom
Txheej txheem cej luam: 14 Ntau hom kev ntsuas ntsuas thiab lawv siv lub kaum ntse ntse ntsuas. Lub kaum sab xis ntsuas yog lub cuab yeej digital siv los ntsuas lub kaum sab xis. Angle Locator. Angle locators yog siv los ntsuas lub kaum sab xis hauv qhov chaw nyuaj mus txog. Bubble Inclinometer Calipers. Compass. Laser Level. Qib. Micrometer
Cov khoom siv kuaj dej muaj ib lub hom phiaj - txhawm rau txheeb xyuas cov kab mob hauv koj cov dej, yog li koj tuaj yeem siv cov kev ntsuas tsim nyog los xyuas kom koj muaj kev nyab xeeb. Cov khoom siv kuaj dej kuaj pom muaj ntau yam kab mob, xws li hlau, txhuas, nitrate, nitrite, alkalinity, tshuaj tua kab, hardness, kab mob thiab lwm yam
Hiav txwv otters yog foragers uas noj feem ntau nyuaj-shelled invertebrates, nrog rau cov hiav txwv urchins thiab ntau yam clams, mussels, thiab crabs. Lawv muaj ib txoj kev nthuav noj lawv cov tsiaj. Los ntawm kev tswj hwm cov neeg nyob hauv hiav txwv urchin, hiav txwv otters txhawb kev loj hlob ntawm kelp loj, vim tias hom tsiaj no nyiam ntawm hiav txwv urchin grazers
Dab tsi tshwm sim: Feem ntau peb tsis tuaj yeem pom cov pa oxygen tsim los ntawm photosynthesis, tab sis thaum nws tsim hauv qab dej nws zoo li npuas hauv dej. Cov no ntab mus rau hauv lub funnel thiab tshem tawm cov dej nyob rau hauv lub xeem raj
Momentum yog qhov loj hauv kev txav, thiab txhua yam khoom txav tuaj yeem muaj lub zog. Ib qho khoom hloov pauv hauv lub zog yog sib npaug rau nws qhov kev xav. Impulse yog qhov ntau ntawm lub zog lub sijhawm ntawm lub sijhawm. Impulse tsis sib npaug rau lub zog nws tus kheej; es, nws yog qhov nce lossis txo ntawm qhov khoom lub zog
Pom meej qhov loj (m) yog qhov ntsuas qhov ci ntawm lub hnub qub lossis lwm yam khoom siv hnub qub pom los ntawm lub ntiaj teb. Ib yam khoom uas ntsuas tau 5 qhov siab dua li lwm yam khoom yog 100 npaug dimmer. Yog li ntawd, qhov sib txawv ntawm 1.0 nyob rau hauv magnitude sib haum mus rau ib tug brightness piv ntawm 5√ 100, los yog hais txog 2.512
Thaum ib qho tshuaj tiv thaiv ua rau lub zog yog coj los yog tso tawm. Nyob rau hauv ib qho exergonic cov tshuaj tiv thaiv, lub zog raug tso tawm rau ib puag ncig. Cov ntawv cog lus raug tsim muaj zog dua li cov ntawv cog lus tau tawg. Nyob rau hauv ib qho endergonicreaction, lub zog yog absorbed los ntawm cov puag ncig
Hmoov zoo, biologists tau tsim cov npe ntawm yim tus yam ntxwv sib koom los ntawm txhua yam muaj sia. Cov yam ntxwv yog qhov zoo lossis qhov zoo. Cov yam ntxwv no yog lub koom haum ntawm tes, kev yug me nyuam, metabolism, homeostasis, heredity, teb rau stimuli, kev loj hlob thiab kev loj hlob, thiab adaptation los ntawm evolution
Hydrogen bonds hauv dej muab ntau yam txiaj ntsig zoo rau dej: cohesion (tuav cov dej molecules ua ke), cov cua kub tshwj xeeb (nqus cua sov thaum tawg, tso cua sov thaum tsim; txo qhov kub thiab txias hloov), kub ntawm vaporization (ntau cov hydrogen bonds yuav tsum tau tawg rau hauv. kom evaporate dej)
Kev cai dab qhuas kev cai dab qhuas, kev lag luam kev lag luam, kev npaj zaub mov, kev tu me nyuam, kev sib tham nrog cov neeg nyob sib ze, thiab ntau yam ntawm lub neej yog tag nrho ntawm cov neeg koom nrog kev soj ntsuam
Qhov chaw khoob ntawm lub atomic huab ntawm ib lub atom thiab nws cov nucleus tsuas yog qhov ntawd: qhov chaw khoob, lossis lub tshuab nqus tsev. Electrons yog li 'kis tawm' me ntsis hauv lawv lub orbits txog lub nucleus. Qhov tseeb, yoj-kev ua haujlwm rau cov hluav taws xob hauv s-orbitals txog lub nucleus tiag tiag txuas mus rau hauv lub nucleus nws tus kheej
Cov qauv ntawm Lysosomes Lysosomes yog ib puag ncig cov kab mob sib txuas nrog ib leeg lysosomal membrane. Lub membrane yog impervious rau acidic ntsiab lus ntawm lysosome. Qhov no tiv thaiv tus so ntawm lub cell los ntawm digestive enzymes nyob rau hauv daim nyias nyias
Rau cov khoom siv kho qhov muag, txhais los ntawm [α]θλ = α/γl, qhov twg α yog lub kaum sab xis los ntawm lub dav hlau polarized lub teeb yog tig los ntawm kev daws ntawm huab hwm coj concentration γ thiab txoj kev ntev l. Ntawm no θ yog qhov kub ntawm Celsius thiab λ lub wavelength ntawm lub teeb uas qhov ntsuas tau ua tiav
Catalase yog ib qho enzyme uas catalyzes decomposition ntawm hydrogen peroxide. Lub npe system ntawm 2H2O2 - → 2H2O + O2 yog H2O2; H2O2 yog oxidoreductase (E, C, 1, 11, 1, 6). Nws cofactor yog heme thiab molecular hnyav yog 250,000, uas twb muaj lawm nyob rau hauv daim ntawv ntawm tetramer. Catalase muaj nyob rau hauv yuav luag tag nrho cov tsiaj hlwb
Ntuj uranium tsuas yog kwv yees li 0.7 feem pua U-235, fissile isotope. Tus so yog U-238. Nws yog kwv yees li 40 feem pua ntawm cov hluav taws xob tsawg dua li cov uranium, raws li US Department of Veterans Affairs. Qhov no depleted uranium tsuas yog txaus ntshai yog tias nws nqus tau, noj lossis nkag mus rau hauv lub cev hauv kev tua lossis tawg
Gene duplication (los yog chromosomal duplication lossis gene amplification) yog ib txoj hauv kev loj los ntawm cov khoom siv caj ces tshiab tsim tawm thaum lub sij hawm molecular evolution. Nws tuaj yeem txhais tau tias yog ib qho kev sib tw ntawm thaj tsam ntawm DNA uas muaj cov noob
Tus nqi kwv yees li $ 40 rau 'sau'
Zeiss Model II raug nqi $ 75,000 hauv xyoo 1926 - ntau dua $ 1 lab hauv cov nyiaj niaj hnub no. Niaj hnub nimno OM projectors tuaj yeem raug nqi ntau dua $ 2 lab
Lub asthenosphere (los ntawm Greek? Σ θ ε ν ή ς asthen? S 'tsis muaj zog' + 'kheej') yog mas khov, mechanically tsis muaj zog thiab ductilelydeforming cheeb tsam ntawm lub sab sauv mantle ntawm lub ntiaj teb. Nws nyob hauv qab lithosphere, ntawm qhov tob ntawm kwv yees li 80 thiab 200 km (50 thiab 120 mais) hauv qab ntawm qhov chaw
Nyob rau theem siab tshaj ntawm lub koom haum (Daim duab 2), lub biosphere yog cov sau ntawm tag nrho cov ecosystems, thiab nws sawv cev rau thaj tsam ntawm lub neej nyob rau hauv lub ntiaj teb no. Nws suav nrog av, dej, thiab txawm tias huab cua rau qee yam
Nta ua los ntawm cua yaig Tsim cov pob zeb pedestals. Cov cheeb tsam tsis muaj zog hauv cov pob zeb tau yooj yim hnav tawm los ntawm kev ua haujlwm ntawm cov cua thiab ua rau cov pej thuam zoo li cov qauv nrog ntau hom duab. Yardang. Deflation Hollows. Inselberg
Txij li cov ntsuas kub infrared tsuas yog ntsuas qhov kub ntawm qhov chaw, lawv tsis muaj txiaj ntsig zoo ntawm kev ntsuas qhov ua tiav ntawm cov khoom noj. Tsuas yog cov ntsuas ntsuas ib txwm ntsuas tuaj yeem txiav txim siab qhov kub thiab txias ntawm cov khoom noj
Hauv lwm lo lus, pH ntawm qhov sib npaug ntawm cov kua qaub (piv txwv li, thaum qhov sib piv ntawm qhov concentration ntawm acid thiab conjugate puag yog 1: 1) yog sib npaug rau pKa. Cov cheeb tsam no yog qhov ua tau zoo tshaj plaws rau kev tiv thaiv kev hloov pauv loj hauv pH thaum cov kua qaub lossis cov hauv paus ntxiv. Lub titration nkhaus visually qhia tsis muaj peev xwm
Lub rheostat yog qhov sib txawv ntawm cov resistor uas yog siv los tswj tam sim no. Lawv muaj peev xwm sib txawv qhov kev tawm tsam hauv ib lub voj voog yam tsis muaj kev cuam tshuam. Rheostats feem ntau yog siv los ua cov cuab yeej tswj fais fab, piv txwv li los tswj lub teeb siv (dimmer), ceev ntawm lub cev muaj zog, lub tshuab cua sov thiab qhov cub
Lo lus hom feem ntau txhais li cas? Ib pawg ntawm cov kab mob uas tuaj yeem ua khub thiab tsim cov xeeb ntxwv ntawm ob leeg poj niam txiv neej
Ib qho piv txwv ntawm cov hlau yog sib xyaw ntawm cov hlau thiab hlau. Ib qho piv txwv ntawm cov hlau yog cov tin hauv qhov sib xyaw ntawm tooj liab thiab tin uas ua rau tooj liab. Lub alloy yog ib qho fusion ntawm ob lossis ntau dua hlau lossis cov hlau uas tsis yog hlau. Ib qho piv txwv ntawm cov hlau yog tooj dag, uas yog tsim los ntawm tooj liab thiab zinc