- Branża: Education
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- Company Profile:
Founded in 1879 and named after Texas' greatest hero General Sam Houston, Sam Houston State University is public shcool within the Texas state university system and located in Huntsville, Texas.
It's a multicultural institution that offers 79 bachelorette degree programs, 54 masters and five ...
เรื่องผลิตภัณฑ์ของแยกส่วนประกอบ ของคาร์บอน fossilized และอินทรีย์ในเปลือกโลก โดยทั่วไปประกอบด้วยมีเทนส่วนใหญ่ และเป็นแหล่งของมีเทนในบรรยากาศที่มีการรั่วไหล มันเป็นอย่างกว้างขวางยังขุด แน่นอน
Industry:Chemistry; Weather
สารประกอบเคมีมีเสถียรภาพมาก ใช้ ใน น้ำมัน ตัวทำละลาย และ (ในอดีตในประเทศ S. ) โรง ซึ่งปล่อยคลอรีน (สำคัญ) และฟลูออรีน (สำคัญน้อย) สู่ชั้นบรรยากาศด้านบน ใน stratosphere ผ่านคือ photolyzed (โดย UV แสงอาทิตย์เข้ามา) ไปยังแบบฟอร์มคาร์บอนไดออกไซด์ CO <sub>2</sub> ไฮโดรเจน ฟลูออไรด์ HF และในที่สุด (หลังจากเหตุการณ์หลายที่ดูดซึม UV) อนุมูลของคลอรีน คลอรีนชนิดเหล่านี้เป็นสิ่งสำคัญในการทำลายชั้นโอโซนเหนือแอนตาร์กติกาและคงอื่น (ดูคลอรีน)
Industry:Chemistry; Weather
Vânturile grele caracterizate de un pronuntat sezonier schimbare de direcţie. Vânt, de obicei, lovitură de teren la mare in iarna, iar vara, inversează fluxul şi precipitaţii este mai frecventă. Musoni sunt cele mai tipice în India şi Asia de Sud.
Industry:Chemistry; Weather
มีถ่านหิน น้ำมันดิบ น้ำมัน shales ทาร์แซนด์ และก๊าซธรรมชาตินำ ethane มีเทนที่เกิดขึ้นตามธรรมชาติจากการเน่าของสิ่งมีชีวิตพืชทะเล และที่ดินกว่าล้านปี ทรัพยากรธรรมชาติเหล่านี้ประกอบด้วยการเก็บพลังงานจากดวงอาทิตย์ซึ่งจะปล่อยออกมาเมื่อเผาไหม้ เชื้อเหล่านี้ยังปล่อยสารมลพิษเช่นซัลเฟอร์ไดออกไซด์ ก๊าซคาร์บอนไดออกไซด์ และก๊าซไนโตรเจนไดออกไซด์เมื่อเขียนชนิดต่าง ๆ
Industry:Chemistry; Weather
HF, un lichid clar, corozive, care are un miros extrem de picant şi formează nori densa vapori alb dacă lansat. Ambele lichidul și vaporii poate provoca arsuri grave la toate părţi ale corpului, şi tratament medical este necesar pentru toate expunerile. De fapt, HF arsuri acoperind doar 2% din organism poate fi fatală. Dacă acest chimice vine în contact cu sticla, beton si alte materiale care conţin siliciu, randamentele siliciu tetrafluoride gaze. În general, acest produs chimic este folosit pentru a produce ecologic mai sigur fluorocarburi produse chimice derivate și fluoropolymers. Ecologic vorbind, acid fluorhidric este mult prea reactive a vreodată ajunge la partea superioară a atmosferei, iar surse troposferic, prin urmare, să nu interfereze cu stratul de ozon. Fluorură de hidrogen, cu toate acestea, este produs în situ în stratosferă prin distrugerea Norrish antropice clorofluorocarburi. şi în timp ce acest proces, de asemenea, elibereaza atomice clor care distruge deparafinare ozon, Cl pot fi sechestrate ca HCl, şi eliminate temporar din ciclul de distrugere O <sub>3</sub>. Portoricani HF formează, de asemenea, dar spre deosebire de clor rezervor specia HCl care este în cele din urmă rupt afară de hidroxil radicale, HF este prea stabil pentru th OH dot atac, şi aşa numai semnificative stratosferic chiuveta este difuzia eventuala în troposferă.
Industry:Chemistry; Weather
Nori mari care sunt formate în întregime din cristale de gheaţă. Acestea par delicate şi wispy şi poate ajunge la o înălţime de 35000 de picioare (10.700 metri). Alte tipuri de nori cirrus includ cirrostratus şi cirrocumulus. Cirrostratus este o foaie subţire de nor, care cauzează adesea un halou să apară în jurul soarele sau luna. Cirrocumulus arata ca multe mici tufts de bumbac; cu toate acestea, aceşti nori forma rar.
Industry:Chemistry; Weather
สารอินทรีย์ระเหย มีเทน พบในบรรยากาศที่สามารถผลิตอนุมูลเมื่อปฏิกิริยาทั่วไปบรรยากาศออกไซด์และอนุมูล ยกเว้น สารเหล่านี้มักชอบวงจรการป้อนกลับเชิงบวกเกี่ยวข้องกับการผลิตโอโซน
Industry:Chemistry; Weather
Foarte reactive atomi sau molecule cu incomplet octeti (electronic) şi, prin urmare, inegală numere de electroni. (În cazul hidrogenului radicală este un duet incomplet. ) Radicalilor liberi specii sunt foarte electrophilic, abstract atomi din alte molecule pentru a finaliza octeti lor şi va fi în procesul de, genera noi radicali. În atmosferă, cele mai multe specii de radical liber au viata scurta ori; cu toate acestea, acestea pot promova conversia de oxigen ozon şi, de asemenea, să ia parte în ciclul catalitice de distrugere de ozon (a se vedea clor şi monoxidul de clor). (De asemenea, a se vedea radicali. )
Industry:Chemistry; Weather
Pruteanu <sub>3</sub>, acesta este un acid coroziv, non-volatilă şi anorganice. Este un acid puternic (disociază complet în soluție apoasă) şi este, de asemenea, oxidant. În atmosferă este format prin conversia de monoxid de azot în dioxid de azot, şi în cele din urmă în acid azotic:
2NO + O <sub>2</sub>--> 2NO <sub>2</sub>
3NO <sub>2</sub> + H <sub>2</sub> O--> 2HNO <sub>3</sub> + nu
monoxid de azot în acest proces cele mai multe ori provin din procesele de combustie (bazate pe combustibili fosili) care folosesc aerul atmosferic (care conţin 78. 1% N <sub>2</sub>) care combina cu oxigenul atmosferic în acele procesul de combustie temperatura inalta (a se vedea de monoxid de azot şi dioxid de azot intrări mai jos). Acid azotic este foarte solubil în apă. Acest solubilitatea cu apă permite îndepărtarea uşoară de acid azotic din troposferă de precipitaţii atmosferice. , Acest lucru este denumit ca acid ploaie sau zăpadă. Acid azotic are o concentraţie scăzută în atmosferă, dar oferă un rol important în producţia de sulfuric acid. Acţionează ca un catalizator în conversie a dioxidului de sulf la sulfuric acid. Sulfuric acid, de obicei, este format în nor picături de oxidare a dizolvat dioxid de sulf din nou cel mai adesea lansat de arderea combustibililor fosili.
Industry:Chemistry; Weather
HO <sub>2</sub>, acest radical uşor reacţionează cu oxizi de azot şi hidrocarburile în atmosferă; în medii urbane, principala sursă de hydroperoxy radicale este formaldehidă fotoliza.
Industry:Chemistry; Weather
