English
It-tkabbir taċ-ċelluli mhux biss jiddependi fuq nutrijenti abbundanti, iżda jeħtieġ ukoll li jkun f'firxa ta 'valur pH adattat għal tkabbir u riproduzzjoni normali. Għalhekk, qabel ma tuża l-Cell factory għall-kultura taċ-ċelluli fuq skala kbira, il-valur tal-pH tal-medju għandu jiġi mkejjel u aġġustat l-ewwel.
Il-valur tal-pH jirreferi għall-proporzjon tan-numru totali ta 'jonji idroġenu fis-soluzzjoni għall-ammont totali ta 'sustanzi. Ġeneralment, il-valur tal-pH tal-medju meħtieġ għat-tkabbir taċ-ċelluli huwa 7.2-7.4. Għoli wisq jew baxx wisq ma jwassalx għat-tkabbir taċ-ċelluli. Il-fabbrika taċ-ċelluli tuża mezz likwidu għall-kultivazzjoni taċ-ċelloli, li jista 'jitkejjel b'miter tal-pH. Il-miter tal-pH huwa strument speċjali għall-kejl tal-valur tal-pH ta' soluzzjoni. Jkejjel il-pH tas-soluzzjoni permezz ta 'elettrodu tal-għażla tal-pH (bħal elettrodu tal-ħġieġ), u r-riżultat tal-kejl jista' jkun preċiż sa żewġ postijiet deċimali.
Irid jiġi kkalibrat b'soluzzjoni buffer standard ta 'pH magħrufa (ġeneralment pH 4 ~ 7) qabel l-użu. L-elettrodu tal-miter tal-pH jitlaħlaħ b'ilma distillat u mbagħad mgħaddas fil-medju tal-beaker, u l-pH tal-medju jista 'jinqara mill-iskala tal-miter tal-pH. Kull manifattur jipprovdi struzzjonijiet operattivi dettaljati għal kull miter tal-pH differenti.
Wara l-kejl, jekk il-valur tal-pH tal-medju użat mill-fabbrika taċ-ċelluli jiġi devjat, jeħtieġ li jiġi aġġustat kif xieraq. Il-miter tal-pH jista 'jiġi kkalibrat b'soluzzjoni buffer standard ta' pH magħruf, imbagħad l-elettrodu kompost u t-termometru tar-reżistenza jitqiegħdu fil-medju tal-kultura, u ammont xieraq ta 'aċidu idrokloriku u idrossidu tas-sodju jiżdiedu bil-mod mit-tarf tal-garafina 'l bogħod minn l-elettrodu biex jagħmel il-mezz tal-kultura. Ilħaq u żomm il-pH mixtieq.
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.