English
Nuair a bhíonn cealla á saothrú ag úsáid Athraíonn brú osmotic idéalach cealla saothraithe mhonarcha cille leis an cineál agus cine na gceall. Is é 290 mmol/L brú osmotic plasma daonna, a mheastar a bheith mar an brú osmotic idéalach chun cealla daonna a shaothrú in vitro. Is gnách go mbíonn brú osmotic na gcealla mamach idir 290 agus 300 mmol/L. Tá fibroblasts scamhóg suthach daonna 250-325 mmol/L, agus lucha thart ar 310 mmol/L. In iarratais phraiticiúla, tá an brú osmotic de 260-320 mmol/L oiriúnach don chuid is mó de na cealla. Agus an mhonarcha cealla á úsáid chun cealla a chothú, is gá brú osmotic cuí a choimeád de réir choinníollacha na gcealla, ionas go gcinnteofar fás maith na gcealla., bíonn sé so-ghabhálach ag fachtóirí éagsúla. Ar nós teocht, luach PH, timpeallacht gháis, etc., ar gné an-tábhachtach é brú osmotic freisin. Dá bhrí sin, tá brú osmotic ar cheann de na coinníollacha tábhachtacha chun cealla in vitro a shaothrú. Baineann cothabháil brú osmotic de chealla fíocháin mhamach agus ainmhithe eile in vitro go príomha le NaCl, ach ní féidir neamhaird a dhéanamh ar an gcaidreamh brú osmotic de thréleictreach eile. Tá an brú osmotic comhréireach le líon na móilíní agus na n-ian den tuaslagáit in aghaidh an aonaid toirte tuaslagóra. Ar an ábhar seo, tá sé an-tábhachtach an t-iarmhéid ian sa mheán cultúir a rialú i gcion áirithe agus gnáth-bhrú osmotic a choinneáil. Tá sé seo ní amháin a choimeád ar bun teannas cille, ach freisin a rialáil meitibileacht na cealla. Toisc go n-athraíonn iompar ian extracellular agus tiúchan ian iompar cothaithigh eile (cosúil le aimínaigéid, siúcrós, etc.), bíonn tionchar díreach aige ar chóras sintéise bunúsach na gcealla.
Cells in hypertonic or hypotonic solutions can shrink or swell and rupture immediately. Therefore, osmotic pressure is one of the important conditions for culturing cells in vitro. The maintenance of osmotic pressure of mammalian and other animal tissue cells in vitro is mainly related to NaCl, but the relationship of osmotic pressure of other dielectrics cannot be ignored. The osmotic pressure is proportional to the number of molecules and ions of the solute per unit volume of solvent. For this reason, it is very important to control the ion balance in the culture medium in a certain proportion and maintain normal osmotic pressure. This is not only to maintain cell tension, but also to regulate the metabolism of cells. Because extracellular ion transport and ion concentration change the transport of other nutrients (such as amino acids, sucrose, etc.), it directly affects the basic synthesis system of cells.
The ideal osmotic pressure of cell factory cultured cells varies with the type and race of cells. The osmotic pressure of human plasma is 290 mmol/L, which is considered to be the ideal osmotic pressure for culturing human cells in vitro. The osmotic pressure of mammalian cells is generally 290 to 300 mmol/L. Human embryonic lung fibroblasts are 250-325 mmol/L, and mice are about 310 mmol/L. In practical applications, the osmotic pressure of 260-320 mmol/L is suitable for most cells.
To sum up, the osmotic pressure directly affects the normal growth of cells. When using the cell factory to cultivate cells, it is necessary to maintain an appropriate osmotic pressure according to the conditions of the cells, so as to ensure the good growth of the cells.
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.