Tus naj npawb atomic yog tus naj npawb ntawm protons hauv lub nucleus ntawm lub atom. Tus naj npawb ntawm protons txhais tus kheej ntawm ib lub caij (piv txwv li, lub caij nrog 6 protons yog carbon atom, txawm tias muaj pes tsawg neutrons tuaj yeem muaj)
Discreteness yog ib lub tswv yim rov qab (tsawg kawg) rau cov structuralists. General tswv yim. Lub tswv yim yog hais tias cov lus sawv cev tuaj yeem muab faib ua me me, cov chav sib cais uas tuaj yeem rov ua dua nrog lwm cov chav me me, sib cais los tsim cov lus sawv cev tshiab
Txawm li cas los xij, ntau txoj cai gene tshwm sim nyob rau theem ntawm kev hloov pauv. Cov kab mob muaj cov txheej txheem tswj hwm tshwj xeeb uas tswj xyuas seb ib lub noob twg yuav raug hloov mus rau hauv mRNA. Feem ntau, cov molecules no ua los ntawm kev khi rau DNA ze ntawm cov noob thiab pab lossis thaiv cov enzyme transcription, RNA polymerase
Nobel qhov kev tsim kho tau tsim thiab siv cov khoom tawg pheej yig dua thiab muaj kev nyab xeeb dua nrog kev sib tsoo tsawg dua & kev tuag. Dynamite kuj ua rau cov hauj lwm ntawm demolition thiab mining yooj yim dua thiab sai dua. Nws kuj tau pab hauv kev txhim kho kev thauj mus los (tsheb ciav hlau thiab txoj kev) thoob plaws ntiaj teb
Lub ntsiab lus ntawm lub teeb ntuj
Glossary DNA ligase: cov enzyme uas catalyzes koom nrog DNA tawg ua ke. DNA polymerase: ib qho enzyme uas tsim cov strand tshiab ntawm DNA ntxiv rau cov qauv strand. helicase: ib qho enzyme uas pab qhib DNA helix thaum DNA replication los ntawm kev rhuav tshem cov hydrogen bonds
Facilitated diffusion (tseem hu ua kev thauj mus los yooj yim lossis kev thauj mus los tsis tu ncua) yog cov txheej txheem ntawm kev thauj mus los tsis tu ncua (raws li tsis yog kev thauj mus los) ntawm cov molecules lossis ions hla ib daim nyias nyias ntawm cov protein tshwj xeeb transmembrane
Element Group: p-block ntawm pawg 17
Koob xim av; Tso rau hauv Lub Caij - Vim tias lawv yog cov ntoo nyiam cov dej, Bald Cypresses yog rhiab rau drought. Yog tias lawv cov av qhuav dhau ib ntus, lawv cov nplooj ntxeev siab rau lawv txoj kev ntxhov siab los ntawm kev tig xim av thiab poob zoo li nws poob. Moth larvae noj ntawm Bald Cypress nplooj
Yuav ua li cas xam voltage poob nyob rau hauv ib tug tooj liab hlau Volts = Length x Tam sim no x 0.017. Thaj chaw. Volts = Voltage poob. Length = Tag Nrho Length ntawm hlau hauv meters (nrog rau txhua lub ntiaj teb rov xaim). Tam sim no = Tam sim no (amps) los ntawm hlau. Sau ntawv. Piv txwv. 50 x 20 x 0.017 = 17. Faib qhov no los ntawm 4 (cross section of wire): 17/4 = 4.25V
Lub nucleus muaj cov ntaub ntawv keeb kwm (DNA) ntawm cov kab tshwj xeeb hu ua chromosomes. Function - Lub nucleus yog lub 'tswj chaw' ntawm lub xovtooj ntawm tes, rau cell metabolism thiab kev tsim tawm. Cov kab mob hauv qab no muaj nyob rau hauv ob qho tib si cog thiab tsiaj txhu
Thaum tsis muaj cov xim tshwj xeeb, lichens feem ntau ci ntsuab rau txiv ntseej grey thaum ntub, grey lossis greyish-ntsuab rau xim av thaum qhuav
Cov ntsiab lus yog cov khoom ntshiab uas tsis tuaj yeem decomposed los ntawm cov tshuaj zoo tib yam xws li cua sov, electrolysis, los yog cov tshuaj tiv thaiv. Kub, nyiaj, thiab oxygen yog piv txwv ntawm cov khoom. Compounds yog cov khoom ntshiab tsim los ntawm kev sib xyaw ua ke ntawm cov ntsiab lus; lawv tuaj yeem decomposed byordinary tshuaj txhais tau tias
Lub ntiaj teb lub pob zeb tseem ceeb tsim ua ntej, nrog cov ntsiab lus hnyav sib tsoo thiab khi ua ke. Tuab cov ntaub ntawv uas poob rau qhov chaw, thaum lub sij hawm sib zog cov ntaub ntawv uas tsim lub kiav txhab. Lub ntiaj teb lub magnetic teb tej zaum tsim nyob ib ncig ntawm lub sij hawm no. Lub ntiajteb txawj nqus ntes tau qee cov pa roj uas ua rau lub ntiaj teb thaum ntxov
Lub plunger koj pom nyob rau sab hnub poob thiab cov duab tas luav yog ib lub tswv yim los tsim cov mem tes - nws yeej ua haujlwm raws tib txoj kab raws li lub tshuab hluav taws xob niaj hnub no - ib lub tshuab siv (qhov no yog lub plunger uas tig lub iav) kom tig lub kauj hlau. hauv ib co hlau nplaum uas tsim ib qho hluav taws xob mem tes uas yuav ua rau lub
Silicon lub semiconductor Nws feem ntau pom muaj txuas nrog ib khub ntawm oxygen molecules li silicon dioxide, txwv tsis pub hu ua silica. Quartz, muaj ntau cov khoom siv hauv cov xuab zeb, yog tsim los ntawm cov khoom siv tsis-crystallized silica. Silicon tsis yog hlau lossis tsis yog hlau; Nws yog ib qho metalloid, ib lub caij uas ntog qhov chaw ntawm ob
2. Puas yog qhov kev txiav tawm yuav xav tau kev kuaj xyuas, kho, kev pabcuam, lossis kev saib xyuas thaum muaj zog? Yog tias koj teb YES rau ob nqe lus nug, koj xav tau arc flash hazard daim ntawv ceeb toom. CEEB TOOM: Yog lawm, cov lus nug yuav luag zoo ib yam hauv ob qho tib si, NEC thiab NFPA
Suab nyob rau hauv dej Nyob rau hauv dej, cov hais yog ntau nyob ze ua ke, thiab lawv muaj peev xwm sai sai kis lub zog vibration ntawm ib tug mus rau lwm yam. Qhov no txhais tau hais tias lub suab nthwv dej mus dhau plaub zaug sai dua li nws xav tau hauv huab cua, tab sis nws yuav siv lub zog ntau los pib qhov kev vibration
Leyland Cypress yog tsob ntoo ntiag tug zoo meej rau cov neeg nyob hauv Maine. Loj hlob ntawm 3 thiab 5 ko taw hauv ib xyoos, Leyland Cypress yuav muab lub vaj Maine txoj kev ceev ntiag tug uas lawv tau tshawb nrhiav
Teb thiab piav qhia: Cells undergo mitosis thiaj li txhawb kev loj hlob lossis kho kev puas tsuaj. Thaum koj laus zuj zus thiab loj zuj zus, koj xav tau ntau lub hlwb, thiab yog li koj cov cellundergo
Nyob rau hauv cov nqe lus ntawm stability, lub staggered conformation yog ntau ruaj khov dua cov dab noj hnub. Qhov no yog vim ob yam: 1) Steric hindrance. Nyob rau hauv lub eclipsed conformation, qhov chaw ntawm lub atoms yuam lawv los ze zog ua ke, ua kom cov steric strain nyob rau hauv lub molecule
Yog li ntawd, tag nrho lub neej ntawm lub hnub qub nrog lub hnub yog li ntawm 10 billion xyoo. Cov hnub qub me tshaj plaws yog cov dwarfs liab, cov no pib ntawm 50% ntawm lub hnub, thiab tuaj yeem ua rau me me li 7.5% ntawm lub hnub
Teb 2: Iceland siv cov dej kub tsim hauv av los ntawm nws cov volcanoes ntau heev rau kev tsim hluav taws xob (qhov no ntawm lub zog - Geothermal - tsis tsim lub tsev cog khoom gases, txoj kev siv cov pa hluav taws xob ua)
Atmospheric Oxygen Levels yog Txo cov pa oxygen tsawg zuj zus thoob ntiaj teb vim yog fossil-roj hlawv. Cov kev hloov pauv me me dhau los ua rau muaj kev cuam tshuam rau tib neeg kev noj qab haus huv, tab sis muaj kev txaus siab rau kev kawm txog kev hloov pauv huab cua thiab carbon dioxide
Nyob rau hauv cov kab mob hlwb, ribosomes yog synthesized nyob rau hauv lub cytoplasm los ntawm transcription ntawm ntau ribosome noob operons. Hauv eukaryotes, cov txheej txheem yuav siv ob qho tib si nyob rau hauv lub cell cytoplasm thiab nyob rau hauv lub nucleolus, uas yog ib cheeb tsam nyob rau hauv lub cell nucleus
Mount Shasta feem ntau yog tsim nyob rau hauv plaub lub khob loj-tsim lub sijhawm uas yog nyob rau ntawm qhov sib cais. Kev tsim kho ntawm txhua lub khob hliav qab yog ua raws li cov silicic eruptions ntawm domes thiab pyroclastic ntws ntawm lub hauv paus vents, thiab ntawm domes, cinder cones, thiab lava ntws ntawm vents ntawm lub flanks ntawm lub cones
Tom qab ntawd peb tuaj yeem pom tias cov lus pom zoo tsis tso cai rau lub voj voog ua haujlwm raws li lub suab nrov raws li qhov tso zis hluav taws xob sai sai rau ib qho khoom siv hluav taws xob lossis lwm yam, vim tias nrog cov lus pom zoo "ntau ua rau ntau" thiab "tsawg ua rau tsawg"
Lub axis ntsug ntawm lub gyro nyiam ua raws nws tus kheej nrog qhov pom tseeb ntsug. Ntawm cov chav kawm sab qaum teb lossis sab qab teb, thiab ntawm cov chav kawm sab hnub tuaj lossis sab hnub poob, lub compass precesses sib npaug rau ob sab thiab qhov ua yuam kev yog xoom. Yog tias qhov no tshwm sim nws yog hu ua gyro-kev ua yuam kev vim nws tsis taw tes rau sab qaum teb
Milky Way yog qhov loj, tab sis qee lub galaxies, zoo li peb cov neeg nyob ze Andromeda Galaxy, loj dua. Lub ntug yog tag nrho cov galaxies - billions ntawm lawv! Peb Lub Hnub yog ib lub hnub qub ntawm cov billions hauv Milky Way Galaxy. Peb Milky Way Galaxy yog ib qho ntawm ntau lab tus galaxies hauv peb lub ntiaj teb
1) Active load switching yog cov txheej txheem nyob rau hauv whichan active tivthaiv (cov khoom muaj peev xwm ntawm amplification andrectification) yog siv raws li ib tug load nyob rau hauv lub Circuit Court. Feem ntau siv Mosfets
Thaum qhov tshwm sim zoo ib yam, cov tib neeg tsuas yog yuav ua phooj ywg nrog cov txheeb ze nyob deb li nrog cov txheeb ze ze - qhov no yog kev sib koom ua ke. Inbreeding - cov tib neeg feem ntau yuav ua phooj ywg nrog cov txheeb ze (xws li lawv cov neeg zej zog) dua li cov txheeb ze nyob deb. Qhov no yog qhov ntau
Teb: Qhov corrosion ntawm hlau qhia tias muaj tshuaj hloov pauv hauv cov hlau. Rust (hydrous oxide) yog ib qho piv txwv ntawm qhov kev hloov no uas tshwm sim thaum hlau raug dej los yog huab cua ntub. Koj cov ntsia hlau hlau tiag tiag yuav xeb sai dua thiab hnyav hauv dej ntsev
Divergent (Spreading): Qhov no yog qhov uas ob daim hlau txav deb ntawm ib leeg. Convergent (Colliding): Qhov no tshwm sim thaum daim hlau txav ntawm ib leeg thiab sib tsoo. Thaum lub phaj continental ntsib ib lub phaj dej hiav txwv, lub thinner, denser, thiab hloov tau yooj yim dua dej hiav txwv phaj dab dej hauv qab cov phaj tuab, nruj dua
Kev vibration txhais tau hais tias txav mus sai sai (los yog nce thiab nqis) txog qhov sib npaug. Ib yam dab tsi uas vibrating yuav co tib lub sijhawm. Yog tias nws vibrates tsis tu ncua, nws tuaj yeem tsim cov suab paj nruag vim nws tuaj yeem ua rau huab cua co. Qhov kev vibration no yuav xa suab nthwv dej mus rau pob ntseg thiab rau lub hlwb
'Yog tias ob kab sib tshuam, ces ib lub dav hlau muaj cov kab.' 'Yog tias ob kab sib tshuam, ces lawv sib tshuam hauv ib qho taw tes.' thiab peb lub ntsiab lus noncollinear txhais lub dav hlau
Nyob rau hauv txhua lub kaum sab xis, rau txhua lub kaum sab xis: Lub sine ntawm lub kaum sab xis = qhov ntev ntawm sab nraud. qhov ntev ntawm lub hypotenuse. Lub cosine ntawm lub kaum sab xis = qhov ntev ntawm sab uas nyob ib sab. qhov ntev ntawm lub hypotenuse. Lub tangent ntawm lub kaum sab xis = qhov ntev ntawm qhov opposite sab. qhov ntev ntawm sab uas nyob ib sab
Potassium yog cov hlau mos, silvery-dawb nrog lub melting point ntawm 63 ° C (145 ° F) thiab qhov kub ntawm 770 ° C (1,420 ° F). Nws qhov ceev yog 0.862 grams ib cubic centimeter, tsawg dua cov dej (1.00 grams ib cubic centimeter). Qhov ntawd txhais tau hais tias cov hlau poov tshuaj tuaj yeem ntab saum dej
Etio- [Gr. aitia, ua rau] Prefix meaning causation. Lub variant aetio- yog siv sab nraum Teb Chaws Asmeskas
Qhov kev sim qhia tau hais tias cov khoom yog qhov zoo tshaj plaws ntawm 3 qhov nruab nrab rau lub suab mus rau qhov nrov tshaj plaws.Tib yam, raws li cov kua molecules nyob ze rau ib leeg piv rau cov pa roj, suab mus zoo dua dhau los ntawm cov roj
Ununseptium yuav tsum yog metalloid thiab yog ib qho hnyav tshaj plaws, tsim cov khoom tsim tawm. Nws yog ib pawg 17 lub ntsiab lus thiab tau kwv yees kom sib koom cov khoom xws li ionization zog thiab melting thiab boiling cov ntsiab lus nrog rau lwm yam halogens, xws li astatin, iodine, bromine, chlorine, bromine, thiab fluorine