English
Hujayra fabrikasimadaniyat texnologiyasi ko'plab keng ko'lamli madaniyatlar uchun keng tarqalgan madaniyat usuli hisoblanadi. Hujayralarni etishtirishda unga hujayralarning normal o'sishi va ko'payishiga to'sqinlik qiluvchi ko'plab omillar ta'sir qiladi. Radiatsiya va ultratovush to'lqinlari ulardan biri.
Ko'rinadigan yorug'lik: Ko'rinadigan yorug'likning to'lqin uzunligi 390~780nm. Har xil rangli yorug'lik hujayra degeneratsiyasiga olib kelishi mumkin, yadro bo'linishining interfazasini uzaytiradi va hujayralarning devorga yopishish qobiliyatini sezilarli darajada kamaytiradi. Shuning uchun hujayralarni in vitro ekish uchun hujayra zavodidan foydalanganda to'g'ridan-to'g'ri quyosh nurlaridan qochish kerak va kulturani qorong'i joyda o'tkazish yoki imkon qadar qisqa vaqt davomida saqlash kerak.
Ultrabinafsha nurlar: hujayralar. zaif UV nurlariga juda chidamli bo'lganlar ko'p o'zgarmaydi, ammo sezgir hujayralar shikastlanadi. Ultraviyole nurlar kuchli bo'lsa, ajratilgan hujayralar shuni ko'rsatadi: to'liq mitoz amalga oshirilmaydi; mitoz davrida sinerez kuchayadi; Mitozda sitoplazmaning to'planishi kamayadi. Nurlangan yuzada pufakchalar hosil bo'lib, keyinchalik hujayralar kengayib, ko'proq zararlanadi.
Radiatsiya: rentgen nurlari hujayralarga aniq zarar yetkazadi, B-nurlari yadro bo'linishiga ta'sir qilishi mumkin, R-nurlari esa yadro bo'linishlari sonini kamaytiradi va hujayra nobud boʻlishi mumkin boʻlgan gʻayritabiiy yadro boʻlinishlariga sabab boʻladi.
Ultratovush: ultratovushli tebranish taʼsirida hujayralar tez orada yorilib, sitoplazma dastlab tartibsiz ravishda oqadi va protoplazmaning kolloid tuzilishi ham sezilarli darajada oʻzgaradi. Agar ultratovushli tebranish to'xtatilsa, uni qayta tiklash mumkin. Hujayra o'limining sababi kavitatsiyaga bog'liq. Ultrasonik to'lqin 2,5 Vt / sm2 bo'lsa, hujayralar shikastlanadi va xromosomalar aberrant bo'ladi. Yadro xromosomalari birinchi bo'lib buziladi.
Radiatsiya va ultratovush to'lqinlari hujayra madaniyati uchun hujayra zavodlaridan foydalanishda muhim omillardir. Bundan tashqari, harorat, osmotik bosim va pH qiymati kabi omillar hujayralarning o'sishi va ko'payishiga ta'sir qiladi. Ushbu omillarni nazorat qilish normal hujayra o'sishini ta'minlashi mumkin.
The FAI climbed 5.9 percent year-on-year in the first 11 months of 2018, quickening from the 5.7-percent growth in Jan-Oct, the National Bureau of Statistics (NBS) said Friday in an online statement.
The key indicator of investment, dubbed a major growth driver, hit the bottom in August and has since started to rebound steadily.
In the face of emerging economic challenges home and abroad, China has stepped up efforts to stabilize investment, in particular rolling out measures to motivate private investors and channel funds into infrastructure.
Friday's data showed private investment, accounting for more than 60 percent of the total FAI, expanded by a brisk 8.7 percent.
NBS spokesperson Mao Shengyong said funds into weak economic links registered rapid increases as investment in environmental protection and agriculture jumped 42 percent and 12.5 percent respectively, much faster than the average.
In breakdown, investment in high-tech and equipment manufacturing remained vigorous with 16.1-percent and 11.6-percent increases respectively in the first 11 months. Infrastructure investment gained 3.7 percent, staying flat. Investment in property development rose 9.7 percent, also unchanged.