English
Hujayralarning ifloslanishi hujayralarni etishtirishda juda muammoli muammodir. Hujayralar ifloslanganidan keyin hujayralar sekin o'sib boradi va og'ir holatlarda ular hujayra o'limiga olib keladi va tajriba jarayoniga ta'sir qiladi. Jismoniy ifloslanish hujayra fabrikalarida.
Hujayralarni etishtirishda keng tarqalgan ifloslanish turidir.Jismoniy ifloslanish asosan hujayralarni harorat, tebranish, radiatsiya va radiatsiya kabi fizik omillar taʼsirida yoʻq qilishini bildiradi. Ko'pgina hujayralar uchun in vitroda etishtirish uchun optimal harorat 37-38 ° S dir. Past haroratlarda hujayralarning metabolik faolligi va mitotik qobiliyati pasayadi. Harorat 0 ° C dan past bo'lmasa, hujayra metabolizmi ta'sirlangan bo'lsa-da, hech qanday zarar yo'q; 25 dan 35 ° C gacha, hujayralar sekin o'sadi; lekin bir necha soat davomida 40 ° C da joylashtirilsa, u nafaqat hujayraning omon qolishi va o'sishi uchun noqulay. , va hatto hujayra fabrikasida hujayra o'limiga olib kelishi mumkin. Shu bilan birga, hujayra madaniyati uchun ishlatiladigan muhit, bufer, homila sigir zardobi va boshqalar odatda past harorat tufayli hujayralarga zarar yetkazmaslik uchun harorat 37 ° C atrofida bo'lganda hujayralar uchun ishlatilishi kerak.
Bundan tashqari, hujayra madaniyat muhiti va boshqalar nurlanish yoki ultrabinafsha nurlar ta'sirida bo'lsa, u hujayra metabolizmida o'zgarishlarga olib keladi. Doimiy haroratli inkubator atrofida mexanik tebranish hosil qiladigan uskunalar mavjud bo'lib, bu sitoplazmaning tartibsiz oqimiga olib keladi va protoplastlarning kolloid tuzilishi ham sezilarli darajada o'zgaradi. Agar tebranish ma'lum bir qiymatdan oshsa, bu hujayraning shikastlanishiga va xromosoma aberatsiyasiga olib keladi. Shuning uchun tebranish uskunalarini karbonat angidrid inkubatorlari yaqiniga qo'ymaslik tavsiya etiladi.
Yuqoridagilar hujayra zavodlarida hujayralarni o'stirishda umumiy jismoniy ifloslanishlardir. Hujayralar atrof-muhitga sezgir va har qanday ifloslanish ularning o'sishi va ko'payishiga ta'sir qilishi mumkin. Shuning uchun, ifloslanish manbalarini kiritmaslik uchun operatsiya qat'iy belgilangan tartib-qoidalarga muvofiq amalga oshirilishi kerak.
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.