English
Hayotiy fanlar sohasining jadal rivojlanishi hujayra madaniyati sarf materiallariga bo'lgan talabni kengaytirishda davom etdi. Ular orasida keng ko'lamli hujayra madaniyati uchun hujayra fabrikalari ko'plab farmatsevtika kompaniyalari va vaktsina ishlab chiqaruvchilari tomonidan ma'qullanadi. Hujayra o'sishi ma'lum sharoitlarni talab qiladi, steril muhit bilan bir qatorda, mos harorat ham talab qiladi.
Umuman olganda, sut emizuvchilar va parrandalar hujayralarini in vitroda etishtirish uchun mos harorat 37-38 °C dir. Noto'g'ri atrof-muhit harorati hujayralar o'sishiga ta'sir qiladi. Hujayralarning past haroratga chidamliligi yuqori haroratga qaraganda kuchliroqdir. Past haroratda 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 bo'lgan haroratda hujayralar sekin o'sadi.
Yuqori harorat hujayra madaniyati uchun yaxshi emas. Hujayralar 1 soat davomida 39 ~ 40 ° C da ekilgan bo'lsa, ular ma'lum darajada zarar ko'radi, lekin ular hali ham tiklanishi mumkin, lekin ular bir necha soat davomida 2 ° C haroratning oshishiga toqat qila olmaydi. Operatsiya jiddiy bo'lib, harorat 43 ° C dan yuqori bo'lganda hujayralarning aksariyati nobud bo'ladi. Yuqori harorat asosan fermentlarning inaktivatsiyasiga, lipidoidlarning yo'q qilinishiga, yadro bo'linishining buzilishiga, koagulaza ishlab chiqarilishiga, hujayralarning koagulyatsiyasiga va oqsillarning denaturatsiyasiga olib keladi. Shuning uchun hujayralarni in vitroda etishtirishda yuqori haroratdan qochish kerak. Hujayra ishlab chiqarish uchun hujayra zavodlaridan foydalanilganda, hujayralar doimo mos haroratda bo'lishini va yaxshi o'sish holatini saqlab turishini ta'minlash uchun doimiy haroratli inkubator yoki issiqxona qo'llaniladi.
Tegishli harorat hujayralarni etishtirish uchun asosiy shartlardan biri hisoblanadi, xolos. hujayra fabrikalari. Bundan tashqari, steril muhit, osmotik bosim, gaz muhiti va pH talab qilinadi. Standartga rioya qilmaslik hujayra madaniyati jarayoniga ta'sir qiladi.
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.