et al. (1993) Use of specific oligonucleotide duplexes to stimulate cleavage of refractory DNA sites by restriction endonucleases. Anal. Biochem. 209, 232–7. Oller, A.R. et al. (1991) Ability of DNA and spermidine to affect the activity of restriction endonucleases from several bacterial ...
Not freezing to death is a pretty good motivator for any animal to get crafty, but our big primate brains took it one step further with igloos.不被冻死是所有动物变灵巧的动力之一，但是人类的大脑更前进了一步，想出了冰屋。Their engineering maximizes warmth and stability.人类最大化雪花的保暖功能...
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阅读下面短文,从短文后的选项中选出可以填入空白处的最佳选项,选项中有两项为多余选项。How to Make a Good Cup of Tea Geor
Did you use soap(肥皂)?Washing with soap is agood way to clean our hands.And here's why.Water alone can't clean our hands,because the germs(细菌)are in the dirt,the dirt sticks to the oil on our hands,and the oil repels(排斥)water.Water and oildon'tmix(混合),so we can't ...
To explore how molecules became signs I will ask: “What sort of process is necessary and sufficient to treat a molecule as a sign?” This requir
A single serving of dry roasted peanuts contains about 180 calories. They're still fine to eat in moderation, but try not to consume more than 1 ounce of peanuts daily. How to Use Peanuts You can eat peanutsraw, blanched, roasted, boiled, fried, powdered, or made into peanut butter. Ea...
s specificity to the primary antibody will be lost. If you use a secondary antibody, e.g. one produced in goat against a murine first antibody, an ideal blocking reagent is normal goat serum. Blocking solutions are normally utilized in concentrations of 1 % (milk powder, BSA) to 5 % (...
Using this technique ensures that you won’t get cornstarch lumps in your sauce. Try to use 75% of the slurry first while stirring, and let the sauce cook for 15 to 20 seconds. Then check the thickness of the sauce. Use more if the sauce needs more thickening or if the sauce is th...
How do you use clear proof charcoal mask? To use: Apply an even layer of the mask over clean skin. Watch it go to work, transforming from a rich, creamy texture to a soft, matte finish as it dries down and absorbs skin impurities. ...