[圖文]第二章 兒童美術活動的分類及其特點-

1、STOCK SOLUTION RECIPIES:Tris-HCl Buffer10X Tris-HCl (0.5M Tris Base, pH7.6:Trizma Base - 61 gDistilled water - 1000 mlAdjust pH 7.6 using concentrated HClStore this solution at room temperature. Dilute 1:10 with distilled water before use and adjust pH if necessary.20X Tris-HCl (1M Tris Base, pH7.6:

2、Trizma Base - 122 gDistilled water - 1000 mlAdjust pH 7.6 using concentrated HClStore this solution at room temperature. Dilute 1:20 with distilled water before use and adjust pH if necessary.10X Tris-HCl-Tween 20 (0.5M Tris Base, 0.5% Tween 20, pH7.6:Trizma Base - 61 gDistilled water - 1000 mlAdjus

3、t pH 7.6 using concentrated HCl and then add 5 ml of Tween 20.Store this solution at room temperature. Dilute 1:10 with distilled water before use and adjust pH if necessary.Note: Tris-HCl Buffer is used for specific cases of immunohistochemical staining.* OR you can use Tris Base to make Tris-HCl (

4、note that Tris base is different from TrizmaTris is a chemical with basic properties, having a pKa of 8.1. It can be used to buffer solutions from drastic pH changes, keeping them in the pH range of 7.0 to 9.0.Make any Tris-HCl buffer in this pH range, at any molarity using these simple steps1Calcul

5、ate Moles of Tris Basemol/L * L = moles needed2Calculate Mass of Tris BaseDetermine the mass of Tris base to weigh by multiplying the number of moles by the molecular weight (121.14 g/mol of Tris.moles needed * g/mol = g3Dissolve Tris Base in WaterDissolve the required mass of Tris into a volume of

6、deionized waterapproximately 1/3 of the desired volume of buffer to be made.4Adjust the pHUsing a pH meter, titrate the solution of Tris with 1M hydrochloric acid (HCluntil the correct pH is reached.5Bring to VolumeAdd the TrisHCl mixture to a volumetric flask of the desired volume and adddeionized

7、water as required to complete the solution.0.2M Phosphate Buffer-4 Liters (pH 7.4:17.66g Sodium Phosphate Monobasic90.03g Sodium Phosphate Dibasic Heptahydrate4 Liters ddH2OpH should be 7.4, if not adjust with 1.0N NaOH or 1.0N HCl(3 Liters-13.25g Mono and 67.52g Dibasic0.1M Phosphate Buffer Saline

8、(PBS-8 Liters:Prepare 4 liters of 0.2M phosphate buffer (see above recipeAdd 72g NaCl (0.9% or 9g/literAdd 4 liters of ddH2OpH=7.4*For practical purposes, you can also make 16 liters of PBS by first preparing 4 liters of 0.4M Phosphate Buffer. This concentration uses twice as much Monobasic and Diba

9、sic since 0.4M versus 0.2M means the solution is twice as concentrated. But remember, you must then dilute this solution by adding 12 liters of water to make a total of 16 liters at a concentration of 0.1M. Also, since we are using 9gNaCl/liter, a total of 144g of NaCl will be used.0.1M Phosphate Bu

10、ffer-1 liter:0.5 Liter of 0.2 M Phophate Buffer Stock0.5 Liter of ddH2O0.1M Phosphate Buffered Saline with Azide-1 liter (PBS*:Prepare one liter of 0.1M Phosphate Buffer (see recipe aboveAdd 9g of NaClAdd 200mg of sodium azide (contents of 1 eppendorf vialAdd 0.3 ml Triton-X*Be sure to use protectiv

11、e clothing and a mask when handling sodium azide under hood!1% Paraformaldehyde 2% Glutaraldehyde0.2M Stock Phosphate Buffer pH 7.4 500mlParaformaldehyde 10gGlutaraldehyde (25% in water 80mlDistilledwater QS to 1000mlDissolve the paraformaldehyde in about 400 ml of water. Heat this solution to 58 to

12、 60 degrees C(do not allow the solution to get to hot!. Add 1N NaOH drop by dropuntil the solution turns clear. Add the phosphate buffer stock and allow to cool, and then add the glutaraldehyde. Ph the solution to 7.4 and FILTER before use.1% Paraformaldehyde 2% Glutaraldehyde (Hrp Fix0.2M Stock Pho

13、sphate Buffer pH 7.4 500mlParaformaldehyde 10gGlutaraldehyde (25% in water 80mlDistilled water QS to 1000mlDissolve the paraformaldehyde in about 400ml of water. Heat the solutionto 58 to 60 degrees C (do not allow the solution to get too hot!. Add 1N NaOH drop by dropuntil the solution clears.Add p

14、hosphate buffer stock and allow the solution to cool. Add theglutaraldehyde and FILTER.2% PARAFORMALDEHYDE0.2M Stock Phosphate Buffer pH 7.4 500mlParaformaldehyde 20gDistilled water QS to 1000mlDissolve the paraformaldehyde in about 400ml of water. Heat the solutionto 58 to 60 degrees C(do not allow

15、 the solution to get too hot!. Add 1N NaOH drop by dropuntil the solution clears.Add phophate buffer stock and allow the solution to cool. pH to 7.4 and FILTER.4% PARAFORMALDEHYDE0.2 M Stock Phosphate Buffer pH 7.4 500mlParaformaldehyde 40gDistilled water QS to 1000mlDissolve the paraformaldehyde in

16、 about 400ml of water. Heat the solution to 58 to 60 degrees C(do not allow the solution to get too hot! Add 1N NaOH to the paraformaldehyde solution drop by drop until the solution clears. Add phosphate buffer stock and allow to cool. pH to 7.4 and FILTER.4% PARAFORMALDEHYDE 0.2% GLUTARALDEHYDE0.2M

17、 Stock Phosphate Buffer pH 7.4 500mlParaformaldehyde 40gGlutaraldehyde (25% in water 8mlDistilled water QS to 1000mlDissolve the paraformaldehyde in about 400 ml of water. Heat the solutionto 58 to 60 C(do not allow the solution to get too hot!. Add 1N NaOH drop by dropuntil the solution clears. Add

18、 phosphate buffer stock and allow the solution to cool. Add the glutaraldehyde. pH to 7.4 and FILTER.Sucrose solution10% 10gram in 90 ml 0.1 M PB20% 20gram in 80 ml 0.1 M PB30% 30gram in 70 ml 0.1 M PBAcrylamide for separating gel (Acrylamide : BIS = 30 : 0.135Acrylamide 30.00 gBIS 0.135 gMake volum

19、e to 100 ml with MQ water. Keep in dark (Brown bottleSeparating gel buffer (pH 8.8 (Final Conc.Tris 12.11 g 1 MSDS 0.27 g 0.27%Dissolve in 80 ml MQ water, adjust pH to 8.8, make the vol. to 100 mlAcrylamide for stacking gel (Acrylamide : BIS = 29.2 : 0.8Acrylamide 29.2 gBIS 0.8 gMake volume to 100 ml with MQ water. Keep in dark (Brown bottleStacking gel buffer (pH 6.8 (Final Conc.Tris 3.03 0.25 MSDS 0.20 g 0.2%Dissolve in 80 ml MQ water, adjust pH to 6.8, make the vol. to 100 mlSDS-PAGE running bufferT