English
Hujayralarning o'sishi nafaqat ozuqa moddalarining ko'pligiga bog'liq, balki normal o'sish va ko'payish uchun mos pH qiymati oralig'ida bo'lishi kerak. Shuning uchun katta hajmdagi hujayra madaniyati uchun hujayra fabrikasi dan foydalanishdan oldin, avval muhitning pH qiymatini o'lchash va sozlash kerak.
pH qiymati vodorod ionlarining umumiy soniga nisbatini bildiradi. moddalarning umumiy miqdori uchun eritmada. Odatda, hujayra o'sishi uchun zarur bo'lgan muhitning pH qiymati 7,2-7,4 ni tashkil qiladi. Juda baland yoki juda past hujayralar o'sishiga yordam bermaydi. Hujayra zavodi hujayralarni etishtirish uchun suyuq muhitdan foydalanadi, uni pH o'lchagich bilan o'lchash mumkin. PH o'lchagich eritmaning pH qiymatini o'lchash uchun maxsus asbobdir. U eritmaning pH qiymatini pH tanlash elektrodi (masalan, shisha elektrod) orqali o'lchaydi va o'lchov natijasi ikki kasrli kasrgacha aniq bo'lishi mumkin.
U ma'lum pH (odatda pH) bo'lgan standart bufer eritmasi bilan kalibrlanishi kerak. 4~7) ishlatishdan oldin. PH o'lchagichning elektrodi distillangan suv bilan yuviladi va keyin stakanning muhitiga botiriladi va muhitning pH qiymatini pH o'lchagich shkalasidan o'qish mumkin. Har bir ishlab chiqaruvchi har bir turli pH o'lchagich uchun batafsil foydalanish ko'rsatmalarini taqdim etadi.
O'lchovdan so'ng, hujayra zavodi tomonidan ishlatiladigan muhitning pH qiymati og'ishsa, uni mos ravishda sozlash kerak. PH o'lchagichni pH ma'lum bo'lgan standart bufer eritmasi bilan kalibrlash mumkin, keyin kompozit elektrod va qarshilik termometri madaniy muhitga joylashtiriladi va xlorid kislotasi va natriy gidroksidning tegishli miqdori asta-sekin stakanning uchidan qo'shiladi. madaniyat muhitini yaratish uchun elektrod. Istalgan pH ga erishing va saqlang.
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.