The AGAR diffusion and quantitative precipitin reaction show that the antigenicity of BSA decreases considerably after NBS treatment.

琼脂扩散及免疫定量实验结果显示NBS处理后bsa的抗原性减弱。

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Though low feed concentration provide high permeation rate but total protein concentration and individual protein concentration in the permeate decreases considerably.

虽则低饲粮叨质求给下渗出进程率，但是总卵黑露质露址⒔正在渗进的整丁卵黑量含质相痴轨减少。

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In addition, vitamin D can be produced by the skin with sunlight exposure, but this ability decreases with age and varies considerably by geography, time of day or year, skin melanin content (darker skin produces less vitamin D) and sunscreen use.

CNN: How much vitamin D should someone over 55 take?