English
Hujayra madaniyati flaskshujayra madaniyati jarayonida keng tarqalgan ishlatiladigan sarf materiallari turidir. Hujayra growth atrof-muhit uchun yuqori talablarga ega va sarf materiallarini tanlash ham pirogensiz talablarga javob berishi kerak. Unda pirojensiz degani nimani anglatadi?
Pirogenlarning ikki turi mavjud. Ulardan biri endogen pirogen bo'lib, u gipotalamusning tana haroratini tartibga solish markaziga ta'sir qiladi va tana haroratini ko'tara oladigan oqsildir. Ulardan biri ekzogen pirogen bo'lib, u isitmaning sababi bo'lishi mumkin bo'lgan begona moddalarni anglatadi. Odatda endogen pirogenlarni qo'zg'atish orqali ishlaydi. Biz odatda pirojensiz sarflanadigan materiallar, masalan, hujayra madaniyati kolbalari deb ataladigan narsa ekzogen pirogenlarga tegishli.
Ekzogen pirogenlar asosan bakterial pirogenlar bo'lib, ular ma'lum bakteriyalar, bakteriya jasadlari va endotoksinlarning metabolitlari hisoblanadi. Gram-manfiy tayoqchalar eng kuchli issiqlik hosil qilish qobiliyatiga ega, keyin esa gramm-musbat tayoqchalar. Gram-musbat kokklar zaifroq. Mog'orlar, xamirturushlar va hatto viruslar ham pirogenlarni ishlab chiqarishi mumkin. Pirojen odatda fosfolipid poliol va oqsil birikmasidan hosil bo'lgan kompleksdir. Fosfolipid poliol kompleksning faol markazi bo'lib, eng kuchli pirojenik ta'sirga ega. Uning kimyoviy tarkibi turli shtammlar bilan farq qiladi. Molekulyar og'irligi 5 × 104 dan 5 × 105 gacha, molekulyar og'irlik qanchalik yaqin bo'lsa, termal effekt kuchliroq bo'ladi. Hujayra madaniyati jarayonida, agar sarf materiallarida pirogenlar mavjud bo'lsa, u hujayralarning o'sishi va ko'payishiga bevosita ta'sir qiladi, shuning uchun bu sarf materiallari mumkin bo'lgan ekzogen endotoksinlarni olib tashlash va hujayralarning normal o'sishini ta'minlash uchun maxsus davolashdan o'tishi kerak.
Bundan tashqari. hujayra madaniyati kolbalari, hujayra madaniyatida ishlatiladigan mikropipetlar va mos keladigan maslahatlar kabi sarf materiallari foydalanishdan oldin pirogenlarni yo'q qilish uchun maxsus ishlov berishni talab 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.