The results were as follows: the addition of imported PGA and isomerised hop extract could increase HRV of beer samples by 10% after three months and satisfactory foam stability in shelf-period achieved;

• 添加进口PGA和异构化酒花浸膏90 d后样品的泡持提高比例仍大于10%25,货架期泡沫稳定性较好;