English
Hujayra ifloslanishi zararli tarkibiy qismlarni ishlab chiqarish va hujayra nopokligini keltirib chiqarish uchun hujayra madaniyati muhitiga aralashadigan begona moddalarni anglatadi. hujayra fabrikalari dagi hujayralarni o'stirishda ko'plab umumiy ifloslanishlar mavjud bo'lib, ular orasida kimyoviy ifloslanish juda muhim va keng tarqalgan tur.
Madaniyat muhitidagi ko'plab kimyoviy moddalar hujayralarning ifloslanishiga olib kelishi mumkin. Shuningdek, bu kimyoviy moddalar har doim ham hujayra o'sishiga to'sqinlik qilmaydi. Gormonlar kabi ba'zi moddalar hujayra fabrikalarida hujayra o'sishiga yordam berishi mumkin, ammo tozalanmagan moddalar, muhitlar, suv, sarum, o'sish kofaktorlari va reagentlarni saqlash uchun idishlar kimyoviy ifloslanish manbasiga aylanishi mumkin.
1. Aminokislotalar kabi hujayra madaniyati uchun muhim oziq moddalar, agar konsentratsiya tegishli diapazondan oshsa, hujayralar uchun toksik bo'ladi.
2. Turli hujayra liniyalari optimal madaniyat sharoitida sarum va buferga har xil talablarga ega bo'lib, ular ekish vaqtida qat'iy nazorat qilinishi kerak.
3. Eng keng tarqalgan kimyoviy ifloslanish shishani tozalash jarayonida qolgan denaturant yoki sovun (odatda shisha qopqog'ining ichki yuzasida) qoldiqlaridir.
4. Suv qotib qolganda shishib ketadigan yagona birikma, shuning uchun hujayralarni kriokonservalash uchun idish tanlashda bu omilni hisobga olish kerak.
5. Suvni metall ionlari, organik molekulalar, hujayra ichidagi toksinlar va boshqa moddalar bilan ifloslantirmaslik uchun suyuqliklarni tayyorlash va idishlarni tozalashda aralashmalarsiz o'ta toza suvdan foydalanish kerak.
6. Hayvon zardobi hujayra madaniyatida keng qo'llaniladigan tabiiy vositadir, ammo sarum biologik va kimyoviy ifloslanishning potentsial manbai hisoblanadi. Sarumning turli hujayralarga o'sishni rag'batlantirish qobiliyati va toksik va nojo'ya ta'siri bu hujayralarning differentsiatsiya funktsiyasi, to'qima manbai va muhitning tarkibi kabi omillarga bog'liq. Bir qator eksperimentlarni o'tkazishda, tajribaning takrorlanishini ta'minlash uchun, sarumning bir xil partiyasidan foydalangan ma'qul.
Yuqoridagilar hujayra zavodlarida hujayralarni etishtirishda keng tarqalgan kimyoviy ifloslanishlardir. Bundan tashqari, madaniy muhit va reagentlarni to'g'ri tayyorlash va saqlash ham juda muhimdir. Suyuqlik hajmini hisoblashda xatolik va shunga o'xshash aralashmalarni aralashtirish kabi xatolarga yo'l qo'ymaslik uchun standart operatsion tartib-qoidalarni bajarish kerak. Hujayra madaniyati tajribalarida ushbu omillarni nazorat qilish ifloslanish ehtimolini kamaytirishi va tajriba jarayonini tezlashtirishi 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.