农产品加工·学刊(下)
農產品加工·學刊(下)
농산품가공·학간(하)
Academic Periodical of Farm Products Processing
2013年
12期
1-4,7
,共5页
孙丽雯%刘倩%侯丽丽%王志朋%高昕
孫麗雯%劉倩%侯麗麗%王誌朋%高昕
손려문%류천%후려려%왕지붕%고흔
扇贝柱%冷风干燥%自然晾晒%色差%微观组织结构
扇貝柱%冷風榦燥%自然晾曬%色差%微觀組織結構
선패주%랭풍간조%자연량쇄%색차%미관조직결구
scallop%cold-blast air drying%natural drying%color difference%microstructure
对扇贝柱进行冷风干燥试验,并以传统自然晾晒方法为对照,比较分析干燥时间、干燥速率、基本成分、色差以及微观组织结构的变化。结果表明,当扇贝柱样品的干基含水率由250%下降至30%,冷风干燥仅需20 h,是自然晾晒时间的42%。从干燥后的成品品质来看,2种干燥方式都能显著增加蛋白质和灰分的含量(p<0.05),而对脂肪含量没有显著影响。同时,由于冷风干燥温度较低,时间较短,其总糖损失少,含量显著高于自然晾晒样品,而且冷风干燥技术能更好地保持贝柱色泽亮度。通过扫描电镜(SEM)观察微观组织结构可知,冷风干燥条件下的样品肌纤维结构排列均匀有序,未发生断裂和卷曲现象。因此,与传统自然晾晒干燥方法相比,冷风干燥方式具有干燥时间短、过程控制简单方便、成品品质和安全性均佳等特点,是扇贝柱干燥加工的一种较好方式。
對扇貝柱進行冷風榦燥試驗,併以傳統自然晾曬方法為對照,比較分析榦燥時間、榦燥速率、基本成分、色差以及微觀組織結構的變化。結果錶明,噹扇貝柱樣品的榦基含水率由250%下降至30%,冷風榦燥僅需20 h,是自然晾曬時間的42%。從榦燥後的成品品質來看,2種榦燥方式都能顯著增加蛋白質和灰分的含量(p<0.05),而對脂肪含量沒有顯著影響。同時,由于冷風榦燥溫度較低,時間較短,其總糖損失少,含量顯著高于自然晾曬樣品,而且冷風榦燥技術能更好地保持貝柱色澤亮度。通過掃描電鏡(SEM)觀察微觀組織結構可知,冷風榦燥條件下的樣品肌纖維結構排列均勻有序,未髮生斷裂和捲麯現象。因此,與傳統自然晾曬榦燥方法相比,冷風榦燥方式具有榦燥時間短、過程控製簡單方便、成品品質和安全性均佳等特點,是扇貝柱榦燥加工的一種較好方式。
대선패주진행랭풍간조시험,병이전통자연량쇄방법위대조,비교분석간조시간、간조속솔、기본성분、색차이급미관조직결구적변화。결과표명,당선패주양품적간기함수솔유250%하강지30%,랭풍간조부수20 h,시자연량쇄시간적42%。종간조후적성품품질래간,2충간조방식도능현저증가단백질화회분적함량(p<0.05),이대지방함량몰유현저영향。동시,유우랭풍간조온도교저,시간교단,기총당손실소,함량현저고우자연량쇄양품,이차랭풍간조기술능경호지보지패주색택량도。통과소묘전경(SEM)관찰미관조직결구가지,랭풍간조조건하적양품기섬유결구배렬균균유서,미발생단렬화권곡현상。인차,여전통자연량쇄간조방법상비,랭풍간조방식구유간조시간단、과정공제간단방편、성품품질화안전성균가등특점,시선패주간조가공적일충교호방식。
Scallops dried in cold-blast air are tested and compared with those dried naturally. Drying time, drying rate, chief constituent, color difference and changes in microstructure are investigated and analyzed. The results show that when the moisture content drops from 250% to 30%, the time of cold-blast air drying is 20 hours, which is 42% of natural drying. Both two drying methods can remarkably improve the content of protein and ash, but the influence on fat is not significantly. The low temperature and short time of cold-blast air drying contribute to maintaining the total sugar. So the content of total sugar in cold-blast air drying samples is significantly higher than natural drying ones. The colour and brightness of scallops are also kept by cold-blast air drying. The microstructure can be seen by using the scanning electron microscope (SEM) . The muscle fibres of cold-blast air drying scallops are shrank equably and compactly, and there is no fracture and curl appeared. Considering the shorter drying time, easier controlling drying process, better quality and sanitary conditions than traditional natural drying, cold-blast air drying can be a preferable method for scallops.