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<span>天然ä¸é¥±å’Œè„‚è‚ªé…¸å¤šäØ“™åºå¼åQŒéœ€è½¬å˜ä¸ºå弿ž„åž?/span>,<span>æ‰èƒ½è¢«Î?/span><span>-</span><span>氧化酶系作用åQŒè¿›ä¸€æ­¥æ°§åŒ–分解。在生物体内åQŒä¸é¥±å’Œè„‚è‚ªé…¸çš„æ°§åŒ–éœ€è¦æ›´å¤šé…¶çš„å‚与æ‰èƒ½é¡ºåˆ©è¿›è¡Œï¼Œç”׃ºŽåŒé”®çš„存在,ä½?/span><span>DHA</span><span>比饱和åŠå•ä¸é¥±å’Œè„‚肪酸更难氧化分解ã€?/span><span>DHA</span><span>ä¸èƒ½åœ¨çº¿¾_’体中Î?/span><span>-</span><span>氧化åQŒè€Œæ˜¯è¢«è¿‡æ°§åŒ–物酶体氧化,皮肤表皮</span><span>15-</span><span>è„‚æ°§åˆé…¶çš„æ´»æ€§éžå¸”R«˜åQŒå°†</span><span>DHA</span><span>转化ä¸?/span><span>17-</span><span>¾ŸŸåŸºäºŒå¼„›_…­çƒ¯é…¸ã€?/span><span>DHA</span><span>被哺乛_Š¨ç‰©å¸æ”¶åŽåQŒç»å¤§éƒ¨åˆ†ç»“åˆæˆç”˜æÑa三酯ã€?/span> </p> <h3> <b>1.2 DHA<span>çš„åˆæˆä»£è°?/span></b><b></b> </h3> <p class="MsoNormal"> <span>å“ÞZã^动物自èínä¸èƒ½åˆæˆ</span>DHA<span>åQŒä½†å¯ç”±æ‘„食的æÑaé…¸ã€äºšæ²šw…¸æˆ–亚麻酸转化而æˆã€‚在动物体内åQŒæ‘„食的沚w…¸æˆ–亚沚w…¸ä¸»è¦è½¬åŒ–ä¸?/span><span>AA</span><span>åQŒè€Œåˆæˆçš„</span><span>DHA</span><span>æžå°‘且缓åQŒäh体内</span><span>DHA</span><span>主è¦ç”±æ¤ç‰©æÑa亚麻酸è{化而æ¥åQŒç”±äºŽè{化涉å?/span><span>3</span><span>¿Ué…¶åQˆå…¶ä¸­â–³</span><span>6</span><span>去饱和酶为é™é€Ÿé…¶åQ‰çš„代谢˜q‡ç¨‹åQŒå› æ­¤è{化效率较低ã€?/span> </p> <p class="MsoNormal"> <span>å¾®ç”Ÿç‰©åˆæˆå¤šä»·ä¸é¥±å’Œè„‚肪酔R€šå¸¸æ˜¯åœ¨å•ä¸é¥±å’Œè„‚肪酸基¼‹€ä¸Šå¼€å§‹ï¼Œåˆæˆæœºåˆ¶ä¸Žé«˜½{‰ç”Ÿç‰©ä¸€è‡ß_¼ŒåŒ…括廉™•¿¼„³é“¾å’ŒåŽ»é¥±å’Œä½œç”¨ä¸¤ä¸ª˜q‡ç¨‹åQŒåˆ†åˆ«ç”±ç›¸åº”的膜¾l“åˆå»‰™•¿é…¶å’Œè„±é¥±å’Œé…¶å‚¬åŒ–åQŒä‹É¼„³é“¾å¢žé•¿åQ›è„‚肪酸脱饱和体¾pÈ”±å¾®ç²’体膜¾l“åˆçš„细胞色ç´?/span> b5<span>ã€?/span><span>NADH-</span><span>¾l†èƒžè‰²ç´ </span><span>b5</span><span>˜q˜åŽŸé…¶å’Œè„±é¥±å’Œé…¶¾l„æˆã€‚å¾®ç”Ÿç‰©åˆæˆ </span><span>DHA</span><span>是从沚w…¸å¼€å§‹ï¼Œå…¶è„±é¥±å’Œé€”径是Ï?/span><span>-3</span><span>åQ›ä¾›ä½“(乙酰</span><span>CoA</span><span>或丙二酰å•é…°</span><span>CoA</span><span>åQ‰æä¾›ä¸¤ 个碳原å­åQŒåœ¨ </span><span>12</span><span>ã€?/span><span>13</span><span>ä½?/span><span>C</span><span>原å­ä¹‹é—´å¼•入一个åŒé”®ï¼Œå½¢æˆäºšæÑa酸,å†åœ¨</span><span>15</span><span>ã€?/span><span>16</span><span>ä½ç¢³åŽŸå­é—´å¼•入一个åŒé”®ï¼Œ 形戂Î</span><span>-</span><span>亚麻酸,å†ç»˜q›ä¸€æ­¥çš„¼„³é“¾å»‰™•¿å’Œè„±é¥±å’Œè€ŒåÅžæˆ?/span><span>DHA</span>. </p> <h2> <b>2<span>ã€åª„å“å¾®è—ÕdŸ¹å…È”Ÿäº?/span><span>DHA </span><span>çš„ç†åŒ–å› ç´?/span></b><b></b> </h2> <h3> <b>2.1 <span>物ç†å› ç´ </span></b><b></b> </h3> <p class="MsoNormal"> <span>å½±å“微藻生长生äñ”</span>DHA<span>的物ç†å› ç´ æœ‰å…‰ç…§ã€æ¸©åº¦ã€æº¶æ°§é‡ã€ç›åº¦ã€?/span><span>pH</span><span>值等ã€?/span> </p> <p class="MsoNormal"> <span>åQ?/span>1<span>åQ‰å…‰ç…§ï¼šè„‚è‚ªé…¸çš„åˆæˆå…ähœ‰è—ȧ的特异性ã€?/span> </p> <p class="MsoNormal"> <span>åQ?/span>2<span>åQ‰æ¸©åº¦ï¼šä¸åŒçš„æ¸©åº¦å¯¹è—È»†èƒžçš„生长å…ähœ‰è¾ƒå¤§çš„媄å“ã€‚éšæ¸©åº¦çš„å‡é«˜ï¼Œè—È»†èƒžçš„ä»£è°¢å’Œå‘¼åæ€½œç”¨åŠ å¿«ï¼Œç”Ÿé•¿é€ŸçŽ‡å¢žå¤§ã€‚è€Œéšæ¸©åº¦çš„å‡ä½Žï¼Œè—È»†èƒžçš„ä»£è°¢å’Œå‘¼åæ€½œç”¨é™ä½Žã€‚细胞内的多ä¸é¥±å’Œè„‚肪酸累积é‡é€æ¸å¢žå¤§åQ?/span><span>DHA</span><span>å«é‡ä¹Ÿé€æ¸å¢žå¤§ã€?/span> </p> <p class="MsoNormal"> <span>åQ?/span>3<span>åQ‰ç›åº¦ï¼šç›åº¦å¯¹å¾®è—»è„‚肪酸¾l„æˆçš„媄å“å› ¿U而异。一般æ¥è¯ß_¼Œåœ¨é«˜ç›æµ“度下åQŒå¤šä¸é¥±å’Œè„‚肪酸的å«é‡ä¸‹é™ã€‚而在适宜的ç›åº¦æ—¶åQ?/span><span>DHA</span><span>å«é‡éšç€ç›åº¦çš„å‡é«˜è€Œå¢žå¤§ã€?/span> </p> <p class="MsoNormal"> <span>åQ?/span>4<span>åQ‰æº¶æ°§é‡åQšåœ¨è„‚è‚ªé…¸çš„ä»£è°¢é€”å¾„ä¸­ï¼Œåˆ†å­æ°§å‚与脂肪酸的去饱和˜q‡ç¨‹æ˜¯å¤šä¸é¥±å’Œè„‚è‚ªé…¸åˆæˆ˜q‡ç¨‹çš„é™åˆ¶å› å­ï¼Œå¾®è—»å‘酵生äñ”</span><span>DHA</span><span>çš„å«é‡ä¹Ÿå—æ°§‹¹“度的媄å“。一般æ¥è¯ß_¼Œé«˜æµ“度的溶氧中生产的</span><span>DHA</span><span>å«é‡å¤§äºŽä½Žæµ“度中çš?/span><span>DHA</span><span>å«é‡ã€?/span> </p> <p class="MsoNormal"> <span>åQ?/span>5<span>åQ?/span><span>pH</span><span>å€û|¼šä¸åŒçš„微藻都有其适宜çš?/span><span>pH</span><span>倹{€‚它ä¸ä»…å½±å“了微è—È»†èƒžå†…外的¼›Õd­òqŒ™¡¡åQŒä¹Ÿå½±å“了藻¾l†èƒžè†œçš„é€šé€æ€§ã€?/span> </p> <p class="MsoNormal"> <span>此外åQŒåŸ¹å…Õd‘¨æœŸã€åŸ¹å…Õd¯†åº¦ã€ä¿å­˜æ–¹å¼ä¹Ÿå¯¹å¾®è—È”Ÿäº?/span>DHA<span>有媄å“ã€?/span> </p> <h3> <b>2.2 <span>化学因素</span></b><b></b> </h3> <p class="MsoNormal"> <span>åQ?/span>1<span>åQ‰ç¢³æ°®æ¯”åQšåŸ¹å…ÕdŸºä¸­çš„æ°®æº¾l„æˆä¸»è¦å½±å“微藻¾l†èƒžå†…饱和åŠä¸é¥±å’Œè„‚肪酸的比例,当培å…ÕdŸºä¸?/span><span>C/ N</span><span>比å‡é«˜æ—¶åQ?/span><span>Chlorellasorokiniana</span><span>¾l†èƒžå†…多ä¸é¥±å’Œè„‚肪酸的å«é‡å¢žå¤§ã€‚åŒæ—¶åŸ¹å…ÕdŸºçš„ç¢³ã€æÛæºçš„选择也媄å“了微藻生äñ”</span><span>DHA</span><span>çš„äñ”é‡ï¼Œ˜q™è¡¨çŽîCØ“ä¸åŒçš„è—»¿U对¼„Ÿë€æÛæºæœ‰ä¸åŒçš„适应性ã€?/span> </p> <p class="MsoNormal"> <span>åQ?/span>2<span>åQ‰æ°¯åŒ–é’ åQšåœ¨‹¹äh´‹è—ȱ»ä¸­ï¼Œé’ ç¦»å­çš„ä½œç”¨ä¸»è¦æ˜¯è°ƒèŠ‚ç»†èƒžç”Ÿé•¿ä¸­èƒžå†…å¤–çš„æ¸—é€åŽ‹ã€‚åœ¨é«˜ç›‹¹“度下,è—È»†èƒžçš„¾l†èƒžè†œçš„‹¹åŠ¨æ€§å’Œæ¸—é€åŽ‹é™ä½ŽåQŒå¤šä¸é¥±å’Œè„‚肪酸å«é‡ä¸‹é™åQ?/span><span>DHA</span><span>çš„å«é‡ä¹Ÿä¸‹é™åQŒè€Œä½Žç›åº¦ä¸‹æ—¶</span><span>DHA</span><span>çš„å«é‡è¾ƒé«˜ã€?/span> </p> <h3> <b>2.3 <span>微藻生äñ”</span><span>DHA</span><span>的方å¼?/span></b><b></b> </h3> <p class="MsoNormal"> <span>åQ?/span>1<span>åQ‰è‡ªå…ÀL–¹å¼?/span> </p> <p class="MsoNormal"> <span>对光åˆè‡ªå…Èš„微藻˜q›è¡Œç ”ç©¶åQŒå‘çŽîC¸€äº›å…‰åˆè‡ªå…Õd¾®è—»èƒ½äº§ç”Ÿ</span> DHA<span>。如光甲è—Õd’Œéšç”²è—ÖM¸­åQ?/span><span>DHA</span><span>æ˜¯ç£·è„‚é…°èƒ†ç¢±çš„ä¸»è¦æˆåˆ†ï¼Œç‰¹åˆ«æ˜¯éšç”²è—»ä½“内åQŒå°†˜q‘总脂肪酸çš?/span><span>50%</span><span>çš„æˆåˆ†äØ“ </span><span>DHA</span><span>。äh们也已ç»ä»Žæ“vè—ÖM¸­å‘现</span><span>DHA</span><span>åQŒå«é‡å æ€»è„‚肪酸çš?/span><span>12%~36%</span><span>。光åˆè‡ªå…Õd¾®è—Èš„大规模培å…Õd¤šé‡‡ç”¨å¼€æ”‘ּ池ã€å°é—­å¼æ± å’Œž®é—­å¼å…‰åˆç”Ÿç‰©å应器¾pÈ»Ÿ˜q›è¡ŒåŸ¹å…»ã€?/span> </p> <p class="MsoNormal"> <span>åQ?/span>2<span>åQ‰å¼‚å…ÀL–¹å¼?/span> </p> <p class="MsoNormal"> <span>与自å…ÕdŸ¹å…ÀL–¹å¼ç›¸æ¯”,其具有培养过½E‹æ— éœ€å…‰ç…§åQŒå‡ž®‘能é‡ï¼›å¯å…·æœ‰è¾ƒå¤§çš„培养密度åQŒå¯æé«˜åº•物的è{化率åQŒç¾ƒçŸ­äº†å‘酵周期</span>;<span>èƒ½æŽ§åˆ¶æ¸©åº¦ã€æº¶æ°§ç­‰åŸ¹å…»å‚æ•°ã€?/span> </p> <p class="MsoNormal"> ç›®å‰åQŒå·²¾læˆåŠŸåœ°˜q›è¡Œäº†éšç”²è—»å¼‚å…»åŠæØœå…Èš„研究ã€?</p> <h3> <b>2.4 <span>å½±å“真èŒåˆæˆ</span><span>DHA</span><span>的因ç´?/span></b><b></b> </h3> <h4> <b>2.4.1 <span>培养基的¾l„æˆ</span></b><b></b> </h4> <p class="MsoNormal"> <span>åQ?/span>1<span>åQ‰ç¢³æºï¼šçœŸèŒå‘酵生äñ” </span><span>DHA</span><span>æ—Óž¼Œä¸åŒçš„碳æºå¯¹ç”Ÿç‰©é‡ã€èŒä½“è„‚è´¨é‡å’Œè„‚è´?</span><span>DHA</span><span>å«é‡éƒ½æœ‰æžå¤§çš„媄å“。æ€ÖM½“而言åQŒè‘¡è„糖是较佳的¼„ÏxºåQŒç”Ÿç‰©é‡ã€èŒä½“è„‚è´¨é‡ã€è„‚è´?/span><span>DHA</span><span>å«é‡ä»¥åŠ</span><span>DHA</span><span>产é‡éƒ½æ˜¯è¾ƒé«˜çš„。葡è„糖也是油脂å‘酵生äñ”ä¸?**叿€‹É用的¼„ÏxºåQŒè€Œä¸”å¯è¢«æœ‰æ•ˆè½¬åŒ–为æÑaè„‚ã€?/span> </p> <p class="MsoNormal"> <span>åQ?/span>2<span>åQ‰æÛæºï¼šæ°®çš„æ•°é‡å’Œæ¥æºå¯¹çœŸèŒåˆæˆå¤šä¸é¥±å’Œè„‚肪酸有ç€é‡è¦çš„媄å“ã€‚é…µæ¯æŠ½æç‰©ã€?è°äh°}é…”R’ å’Œèƒ°è›‹ç™½èƒ¨æœ‰åˆ©äºŽ</span><span>Thraustochytriumaureum ATCC 34304</span><span>çš„ç”Ÿé•¿ï¼Œå…¶ä¸­ä»¥é…µæ¯æŠ½æç‰©çš„生物é‡******åQŒè°·æ°¨é…¸é’ è¿˜æœ‰åˆ©äºŽè„‚质的¿U¯ç¯åQŒå„¿UæÛæºå¯¹è„‚è´¨</span><span>DHA</span><span>çš„å«é‡åª„å“䏿˜¯å分明显,ä»?/span><span>DHA</span><span>çš„äñ”é‡çœ‹åQŒé…µæ¯æŠ½æç‰©å’Œè°·æ°¨é…¸é’ äؓ较好的æÛæºã€?/span> </p> <p class="MsoNormal"> <span>åQ?/span>3<span>åQ‰ç¢³æ°®æ¯”åQšé™¤äº†ç¢³æºã€æÛæºå¤–åQŒåŸ¹å…ÕdŸºä¸­ç¢³æ°®æ¯”也媄å“真èŒåˆæˆ?/span><span>DHA</span><span>ã€?微生物生长于¼„Ïxº˜q‡å‰©ã€æÛæºä¸­‘»I¼Œæˆ–者是剥夺氮æºçš„环境,便会‹È€å‘和促进脂质的积累作为碳åŠèƒ½æºçš„备用库。一般情况下高的¼„ÏxÛæ¯”有利于脂质的积累和促进èŒä½“的生长,但碳氮比˜q‡é«˜åQŒè„‚质中</span><span>DHA</span><span>å«é‡ž®†ä¼šä¸‹é™ã€?/span> </p> <p class="MsoNormal"> <span>åQ?/span>4<span>åQ‰æ— æœºç›åŠå¾®é‡å…ƒç´ ï¼šåœ¨åŸ¹å…ÀL“v‹z‹å¾®ç”Ÿç‰©æ—Óž¼Œé™¤éžåŸ¹å…»åŸÞZ¸­å«æœ‰­‘›_¤Ÿçš„æ‰€æœ‰å¿…需微é‡å…ƒç´ åQŒå¦åˆ™ï¼Œè¾ƒå¥½é‡‡ç”¨å¤©ç„¶‹¹äh°´ã€‚由于破囊壶èŒå’Œè£‚殖壶èŒå‡äØ“‹¹ïL”ŸçœŸèŒåQŒå› æ­¤åŸ¹å…ÕdŸºä¸­æ·»åŠ ä¸€å®šé‡æ— æœºç›æ˜¯éžå¸¸å¿…è¦çš„ã€?/span> </p> <p class="MsoNormal"> <span>åQ?/span>5<span>åQ‰å‰ä½“促˜q›å‰‚åQšä¸€äº›æœ‰æœºé…¸å’Œç»´ç”Ÿç´ å¯¹çœŸèŒåˆæˆ?</span><span>DHA</span><span>也是å分有用çš?ã€?/span> </p> <h4> <b>2.4.2 <span>é€šæ°”ä¸Žæ…æ‹?/span></b><b></b> </h4> <p class="MsoNormal"> <span>å¾®ç”Ÿç‰©åˆæˆå¤šä¸é¥±å’Œè„‚肪酸˜q‡ç¨‹ä¸­çš„去饱和作用需è¦åˆ†å­æ°§çš„å‚ä¸Žï¼Œåˆ†å­æ°§çš„æœ‰æ•ˆæ€§å†³å®šå…¶äº§ç”Ÿè„‚肪酸的ä¸é¥±å’Œåº¦ã€‚因此,æé«˜åŸ¹å…»åŸÞZ¸­æ°§æµ“度有利于ä¸é¥±å’Œè„‚è‚ªé…¸çš„åˆæˆã€‚æœºæ¢°æ…æ‹Œå¯¹åŸ¹å…»</span>Thraustochytrium <span>å’?/span><span> Schizochytrium </span><span>生äñ”</span><span>DHA</span><span>有ä¸åŒçš„å½±å“。由äº?/span><span>Thraustochytrium</span><span>¾~ÞZ¹¾l†èƒžå£å’Œå¯Œå«ä¸é¥±å’Œè„‚肪酸åQŒç»†èƒžè„†æ€§å¤§åQŒæœºæ¢°æ…拌抑制其生长ã€?ä½?/span><span>Schizochytrium</span><span>的情况则ä¸åŒåQŒé€‚当æé«˜æ…拌速度能促˜q›èŒä½“的生长。å¦å¤–ï¼Œæ…æ‹Œå™¨çš„å¶è½®¾cÕdž‹å¯¹èŒä½“的生长也有影å“ã€?/span> </p> <h4> <b>2.4.3 <span>åˆå§‹</span><span>pH</span><span>å€?/span></b><b></b> </h4> <p class="MsoNormal"> <span>真èŒç”Ÿäñ”</span>DHA<span>æ—?/span><span>,</span><span>选择适宜的åˆå§?</span><span>pH</span><span>å€ég¹Ÿæ˜¯å分é‡è¦çš„ã€?/span> </p> <h4> <b>2.4.4 <span>温度å¯?/span><span>DHA</span><span>çš„ç”Ÿäº§æœ‰ç€æžå…¶é‡è¦çš„媄å“?/span></b><b></b> </h4> <p class="MsoNormal"> <span>å—œå†·å¾®ç”Ÿç‰©æ¯”å—œæ¸©å¾®ç”Ÿç‰©èƒ½åˆæˆæ›´å¤šçš„多ä¸é¥±å’Œè„‚肪酸。许多研½I¶ä¹Ÿè¡¨æ˜ŽåQ?/span> <span>低温能促˜q›å¾®ç”Ÿç‰©åˆæˆä¸é¥±å’Œè„‚肪酸ã€?/span>Brown<span>å’?/span><span>Rose</span><span>è®¤äØ“åQŒç”±äºŽä½Žæ¸©å¢žåŠ æ°§çš„å¯æº¶æ€§ï¼Œäº§ç”Ÿå¤§é‡èƒžå†…åˆ†å­æ°§ï¼Œæœ‰åˆ©äºŽéœ€æ°§å‚与的镉K“¾è„‚肪酸的去饱和作用。å¦å¤–,低温下,微生物äñ”生大é‡å¤šä¸é¥±å’Œè„‚肪酸也是一¿U适应低温环境的手ŒDµï¼Œå› äؓ多ä¸é¥±å’Œè„‚肪酸,特别æ˜?/span><span>EPA</span><span>ã€?/span><span>DHA</span><span>èƒ½ä¿æŒå¾®ç”Ÿç‰©¾l†èƒžè†œä½Žæ¸©æµåŠ¨æ€§ï¼Œä»Žè€Œç»´æŒç»†èƒžæ­£å¸¸åŠŸèƒ½ã€?/span> </p> <h4> <b>2.4.5 <span>¿U龄和接¿Ué‡</span></b><b></b> </h4> <p class="MsoNormal"> <span>¿U龄显著影å“</span>Thraustochytriumaureum ATCC34304<span>的脂质积累和 </span><span>DHA</span><span>产é‡åQŒå¯¹ç”Ÿç‰©é‡å’Œè„‚è´¨</span><span>DHA</span><span>å«é‡å½±å“ä¸å¤§åQŒç§é¾?/span><span>24h</span><span>å’?/span><span>5%</span><span>的接¿U釿—¶è„‚质积累和 </span><span>DHA</span><span>产é‡******ã€?/span> </p> <h4> <b>2.4.6 <span>光照</span></b><b></b> </h4> <p class="MsoNormal"> <span>破囊弧èŒå’Œè£‚ŒD–å¼§èŒäØ“å…ähœ‰å…‰åˆº‹È€ç”Ÿé•¿ç‰ÒŽ€§çš„‹¹ïL”ŸçœŸèŒåQŒå› æ­¤ï¼Œå…‰ç…§å¯¹å…¶ç”Ÿäñ”</span>DHA<span>也有影å“åQ?/span><span>Thraustochytriumaureum ATCC34304</span><span>åœ?/span><span>33W </span><span>è§å…‰ç¯å…‰ç…§ä¸‹çš„生物é‡ã€è„‚è´¨é‡å’?/span><span>DHA</span><span>产é‡éƒ½æ¯”黑暗培养旉™«˜ã€?/span> </p> <h3> <b>2.4.7 <span>培养旉™—´</span></b><b></b> </h3> <p class="MsoNormal"> <span>破囊弧èŒå’Œè£‚ŒD–å¼§èŒå‘é…µåˆæœŸçš„生物é‡å’Œè„‚è´¨é‡å‘ˆ¾U¿åŞ增加åQŒè‡³å¯ÒŽ•°ç”Ÿé•¿æœ«æœŸè¾‘Öˆ°******åQŒæ­¤åŽï¼Œç”Ÿç‰©é‡ä¿æŒåã^½E»I¼Œè€Œè„‚è´¨é‡æœ‰æ‰€ä¸‹é™ã€?/span>DHA<span>å«é‡éšåŸ¹å…ÀL—¶é—´å˜åŒ–åÆˆä¸æ˜Žæ˜¾ã€?/span> </p> <p class="MsoNormal"> <span>ç›®å‰åQŒç ”½I¶å¤šä¸é¥±å’Œè„‚è‚ªé…¸çš„åˆæˆé€”径ã€åŽ»é¥±å’Œé…¶åŸºå› çš„æ€§è´¨ã€è—»¾l†èƒžå†…脂肪酸的组æˆã€åˆ†å¸ƒã€?/span>DHA<span>åˆæˆçš„途径åŠåˆæˆå‰ä½“ç‰©è´¨ç­‰ä¹ŸäØ“å¤šä¸é¥±å’Œè„‚肪酸的工业化生产æä¾›äº†æ›´å¤šçš„ç†è®ºåŸº¼‹€ã€?/span> </p> <p class="MsoNormal"> <span></span> </p> <h1> <b><span>å››ã€?/span>DHA<span>的分¼›ÀLå?/span></b><b></b> </h1> <h2> <b>1<span>ã€ä½Žæ¸©åˆ†¾U§æ³•</span></b><b></b> </h2> <p class="MsoNormal"> <span>利用ä¸åŒçš„脂肪酸在过å†ïLš„æœ‰æœºæº¶å‰‚中的溶解度差异æ¥åˆ†ç¦»‹¹“羃</span> DHA<span>。峞®†æ€»è„‚肪酸¾|®äºŽ</span><span>1~10</span><span>å€çš„æ— æ°´ä¸™é…®ä¸?</span><span>,</span><span>òq¶å†·å´è‡³</span><span>-25</span><span>â„ƒä»¥ä¸‹ï¼Œæ··åˆæ¶²çš„下层为饱和的脂肪酸和低度的ä¸é¥±å’Œè„‚肪酸结æ™Óž¼Œè€Œä¸Šå±‚嫿œ‰å¤§é‡çš„高度的ä¸é¥±å’Œè„‚肪酸的丙酮溶液åQŒå°†æ··åˆæ¶²è¿‡æ»¤ï¼Œæ»¤æ¶²åœ¨çœŸ½IÞZ¸‹è’”R¦é™¤å޻䏙酮åQŒå°±å¯å¾—到较¾U¯çš„</span><span>DHA</span><span>ã€?/span> </p> <h2> <b>2<span>ã€æº¶å‰‚æå–法</span></b><b></b> </h2> <p class="MsoNormal"> <span>利用ä¸åŒè„‚肪酸的金属ç›åœ¨æŸç§æœ‰æœºæº¶å‰‚中的差异æ¥åˆ†¼›ÀLµ“¾~?/span>DHA<span>。该¿U方法是通过皂化åŽï¼Œåœ¨çš‚æ¶²åŠ å…?/span><span>H2SO4</span><span>åQŒåƈž®?/span><span>pH</span><span>调至</span><span>1~2 </span><span>åQŒåˆ†¼›ÖM¸Šå±‚ç²—è„‚è‚ªé…æ€¹™é†‡æØœåˆæ¶²åQŒåŠ å…¥å›žæ”¶ä¹™é†‡ï¼Œòq¶å夿°´‹z—粗脂肪酸至</span><span>pH</span><span>ä¸ÞZ¸­æ€§ã€‚å³å¯å¾—相对较纯çš?/span><span>DHA</span><span>ã€?/span> </p> <h2> <b>3<span>ã€å°¿ç´ åŒ…åˆæ³•</span></b><b></b> </h2> <p class="MsoNormal"> <span>è„‚è‚ªé…æ€¸Žž®¿ç´ çš„结åˆèƒ½åŠ›å–决于其ä¸é¥±å’Œ½E‹åº¦åQŒè„‚肪酸的ä¸é¥±å’Œ½E‹åº¦­‘Šé«˜åQŒå…¶äºŽå°¿ç´ ç»“åˆçš„能力­‘Šå¼±ã€‚因而寞®†é¥±å’Œè„‚肪酸ã€ä½Žåº¦ä¸é¥±å’Œè„‚肪酸ã€é«˜åº¦ä¸é¥±å’Œè„‚肪酸分¼›Õd¼€æ¥ã€‚ç„¶åŽï¼Œåˆ©ç”¨é€‚当的溶剂èƒå–,真空òq²ç‡¥åŽå¯å¾—到</span>DHA<span>å«é‡è¾ƒé«˜çš„ä¸é¥±å’Œè„‚肪酸ã€?/span> </p> <h2> <b>4<span>ã€è¶…临界 </span><span>CO2</span><span>èƒå–æ³?/span></b><b></b> </h2> <p class="MsoNormal"> <span>­‘…äÍ界æµä½“èƒå?/span>(supercritical fluid extraction<span>åQŒç®€¿U?</span><span>SFE)</span><span>是近代å‘展è“væ¥çš„一¿U新型化工分¼›ÀLŠ€æœ¯ã€‚å®ƒåŽŸç†ä¸»è¦æ˜¯å°†</span><span>DHA</span><span>溶于­‘…äÍ界状æ€çš„</span><span>CO2</span><span>ä¸­ï¼Œé€šè¿‡æ”¹å˜æ¸©åº¦å’ŒåŽ‹åŠ›ï¼Œè¾‘Öˆ°åˆ†ç¦»</span><span>DHA</span><span>çš„ç›®çš„ã€‚å®ƒèƒ½å¤Ÿåˆ†ç¦»å‡ø™¾ƒ¾U¯çš„</span><span>DHA</span><span>åQŒä½†æ˜¯å¯¹å«æœ‰ç›¸åŒçš„碳数而åŒé”®ä¸åŒçš„è„‚è‚ªé…¸å´æ•ˆæžœè¾ƒå·®ã€‚此外,现在˜q˜å…·æœ‰è„‚肪酶水解法ã€è†œåˆ†ç¦»æ³•ã€ç¡é…”R“¶å±‚æžæ³•ã€?*****液相色谱法等ã€?/span> </p> <h2> <b>5<span>ã€é…¶æ³•ç ´¼„?/span></b><b></b> </h2> <p class="MsoNormal"> ¾l†èƒžç ´ç¢Žçš„æ–¹æ³•而言å¯åˆ†ä¸ºæœºæ¢°æ³•å’Œéžæœºæ¢°æ³•,机械法包括砼‚¨æ³•ã€é«˜åŽ‹åŒ€‹¹†æ³•ã€è¶…声æ‡L法和微æ‡L法等åQ›éžæœºæ¢°æ³•包括溶酶法ã€é…¸çƒ­æ³•和自溶法½{‰ã€?</p> <p class="MsoNormal"> 酶解法是一¿Uç ”½I¶è¾ƒòq¿çš„¾l†èƒžç ´ç¢Žæ–ÒŽ³•åQŒå®ƒåˆ©ç”¨é…¶å应,分解破å¾l†èƒžå£ä¸Šçš„特ŒDŠé”®åQŒä»Žè€Œè¾¾åˆ°ç ´å£çš„目的ã€?</p> <p class="MsoNormal"> <span>自溶法是一¿U特ŒDŠçš„æº‰™…¶æ–¹å¼åQŒå…¶æ‰€éœ€çš„æº¶èƒžé…¶æ˜¯ç”±å¾®ç”Ÿç‰©æœ¬íw«äñ”生的。事实上åQŒåœ¨å¾®ç”Ÿç‰©ç”Ÿé•¿ä»£è°¢è¿‡½E‹ä¸­åQŒå¤§å¤šéƒ½èƒ½äñ”生一定的水解自èín¾l†èƒžå£ä¸Šèšåˆç‰©ç»“构的é…Óž¼Œä»¥ä¾¿ä½¿ç”Ÿé•¿ç¹ŒD–过½E‹è¿›è¡Œä¸‹åŽ…R€‚控制一定æ¡ä»Óž¼Œå¯ä»¥è¯±å‘微生物äñ”生过剩的溶胞酶或‹È€å‘自íw«æº¶èƒžé…¶çš„æ´»åŠ›ï¼Œä»¥è¾¾åˆ°ç»†èƒžè‡ªæº¶çš„ç›®çš„ã€‚ç›®å‰å¸¸ç”¨çš„自溶促进剂有食ç›ã€ä¹™é†‡ã€ç”²è‹¯ã€ç¡«é†‡ç­‰ã€‚æŸäº›è¯•éªŒæ˜¯é€šè¿‡åœ¨èŒæ¶²åŠ å…?/span>NaCl<span>使其辑ֈ°ä¸€å®šçš„‹¹“度˜q›è¡Œå¤„ç†çš„ã€‚ä¸æº¶å›ºå½¢ç‰©çš„å«é‡éšå¤„ç†æ—‰™—´å»‰™•¿è€Œå‡ž®‘,˜q™æ˜¯å› äØ“</span><span>NaCl</span><span>溶液中,存在渗é€åŽ‹å·®ï¼Œæº¶å‰‚åˆ†å­å¤§é‡˜q›å…¥¾l†èƒžåQŒå¼•èµïL»†èƒžè†œå‘生破裂åQŒä‹É得细胞水解酶与底物接触而被‹È€‹z»ï¼Œåˆ†è§£¾l†èƒžåQŒåŽŸç”Ÿè´¨å¤–æº¢åQŒèƒžå†…äñ”ç‰©é‡Šæ”¾è‡´ä½¿ä¸æº¶å›ºå½¢ç‰©å‡å°‘ã€?/span> </p> <p class="MsoNormal"> 自溶作用是酶解的å¦ä¸€¿U方法,在一定程度上能用于工业生产,但对ä¸ç¨³å®šçš„微生物则å®ÒŽ˜“引è“vè›‹ç™½è´¨å˜æ€§ï¼Œè‡ªæº¶åŽç»†èƒžåŸ¹å…ÀL¶²˜q‡æ×o速度也会é™ä½Žã€?</p> <p class="MsoNormal"> <span>å…¶ä‹Éç”¨æ–¹æ³•äØ“åQšæº¶èŒé…¶æ˜¯ä¸“门作用于微生物细胞å£çš„æ°´è§£é…¶åQŒé…¶è§£æ¡ä»¶äØ“åQ?/span>pH<span>å€?/span><span>7</span><span>·</span><span>2</span><span>çš?/span><span>0</span><span>·</span><span>2 mol</span><span>·</span><span>L-1</span><span>的磷酔R’¾¾~“冲溶液åQ?</span><span>0</span><span>·</span><span>8 mol</span><span>·</span><span>L-1</span><span>的氯化钾溶液åQ?/span><span>0</span><span>·</span><span>5%</span><span>的溶èŒé…¶ã€‚在</span><span>30</span><span>℃将èŒä½“振è¡ä¸åŒæ—‰™—´åŽç¦»å¿ƒï¼ŒèŒä½“é…¶è§£åŽåŠ å…¥ä¸™é…®ã€‚åª„å“因素:温度ã€?/span><span>PH</span><span>ã€è‡ªæº¶æ—¶é—´ç­‰å¯¹è‡ªæº¶æ•ˆæžœéƒ½æœ‰åª„å“,æ ÒŽ®èŒä½“çš„ä¸åŒè€Œæœ‰ä¸åŒçš„媄å“ã€?/span> </p> <p class="MsoNormal"> 酶法破碎的缺点:酶法é¿å…äº†å¤§é‡æœ‰æœºæº¶å‰‚的使用åQŒä½†é…¶ä½œç”¨çš„æ¡äšg比较苛刻åQŒè¿™¾l™è¿‡½E‹çš„æ“ä½œå¸¦æ¥éºÈƒ¦ã€?</p> <p class="MsoNormal"> <span>ç›®å‰å¾ˆå¤šæ˜¯å°†é…¶æ³•与其它儿U细胞破¼„Žæ–¹æ³•结åˆè“væ¥ï¼Œå¦‚é…¶è§?/span>-<span>­‘…声波法åQŒé…¶è§?/span><span>-</span><span>高压破碎法等ã€?/span> </p> <br /> <p> <br /> </p></div> <a href="http://m.alzhaoshang.com//news/82.html" title="二å二碳六烯酸(DHAåQ‰ç”Ÿäº§å·¥è‰ºç®€ä»‹ï¼ˆäºŒï¼‰" rel="nofollow">查看详情 >></a> <i>2018-09-28</i> </div> </div> <div class="subnewslist1"> <a href="http://m.alzhaoshang.com//news/81.html" title="二å二碳六烯酸(DHAåQ‰ç”Ÿäº§å·¥è‰ºç®€ä»?一)" class="imglazyload" rel="nofollow"> <img src="/uploads/news/" width="220" height="150" loadbg="4" onerror="this.src='/template/jhyz202106/res/img/noimg.jpg'"/> </a> <div class="subnewslist2"> <a href="http://m.alzhaoshang.com//news/81.html" title="二å二碳六烯酸(DHAåQ‰ç”Ÿäº§å·¥è‰ºç®€ä»?一)">二å二碳六烯酸(DHAåQ‰ç”Ÿäº§å·¥è‰ºç®€ä»?一)</a> <div><h1> <b><span>一ã€?/span>DHA<span>背景与æ„ä¹?/span></b><b></b> </h1> <p class="MsoNormal"> DHA<span>åQ?/span><span>Docosahexaenoic acid, 22:6</span><span>â–?/span><span>4.7.10.13.16.19</span><span>åQŒå…¨å二å二¼„›_…­çƒ¯é…¸åQ‰æ˜¯ä¸€¿Ué‡è¦çš„镉K“¾å¤šä¸é¥±å’Œè„‚肪酸(</span><span>polyunsaturated fatty acid</span><span>åQŒç®€¿U?/span><span>PUFA</span><span>åQ‰ï¼Œå±žäºŽÏ‰</span><span>-3</span><span>¾pÕdˆ—åQˆåˆ†å­ç»“æž„å¼ä¸­ä¸€ä¸ªåŒé”®ä½äº?/span><span>-COOH</span><span>基团å侧的第三个键上åQŒå³Ï‰</span><span>-3</span><span>¾pÕdˆ—åQ‰ã€‚äh和其它哺乛_Š¨ç‰©åªæœ‰â–³</span><span>4</span><span>ã€â–³</span><span>5 </span><span>ã€â–³</span><span>6</span><span>åŠâ–³</span><span>9</span><span>去饱和酶åQŒç¼ºä¹â–³</span><span>9 </span><span>以上的去饱和é…?/span><span>,</span><span>因此无法自èínåˆæˆ</span><span>DHA</span><span>åQŒå¿…™åÈ”±é£Ÿç‰©æ¥æä¾›ã€?/span> </p> <h2> <b>1<span>ã€?/span><span>DHA</span><span>的结构和性质</span></b><b></b> </h2> <p class="MsoNormal"> DHA<span>的分å­å¼ä¸?/span><span>C22H30O2,</span><span>分å­é‡äØ“</span><span>328.48</span><span>åQŒåˆ†å­ç»“æž„äØ“åQ?/span> </p> <p class="MsoNormal"> DHA<span>通常是顺å¼ï¼Œä½†åœ¨æŸäº›å¼‚构酶作用下å¯å˜æˆåå¼ã€‚嫿œ‰å¤šä¸ªâ€œæˆŒ¼„›_Œçƒ¯â€ç»“æž„åŠ</span><span>5</span><span>ä¸ªæ´»æ³¼çš„äºšç”²åŸºã€‚è¿™äº›æ´»æ³¼çš„äºšç”²åŸø™ˆå¾?/span><span>DHA</span><span>æžæ˜“å—å…‰ã€æ°§ã€è¿‡çƒ­ã€é‡‘属元素(å¦?/span><span>Fe</span><span>ã€?/span><span>Cu</span><span>åQ‰åŠè‡ªç”±åŸºçš„å½±å“åQŒäñ”生氧化ã€é…¸è´¥ã€èšåˆã€åŒé”®å…±è½­ç­‰åŒ–å­¦å应åQŒäñ”生以¾Ÿ°åŸºåŒ–åˆç‰©äØ“ä¸Èš„鱯D‡­ç‰©è´¨ã€?/span> </p> <p class="MsoNormal"> <span>¾U?/span>DHA<span>为无艌Ӏ无呻I¼Œå¸¸æ¸©ä¸‹å‘ˆæ¶²æ€ï¼Œä¸”å…·æœ‰è„‚æº¶æ€§ï¼Œæ˜“æº¶äºŽæœ‰æœºæº¶å‰‚ï¼Œä¸æº¶äºŽæ°´åQŒç†”ç‚¹äØ“åQ?/span><span>45.5~</span><span>åQ?/span><span>44.1</span><span>åQŒæ‰€ä»¥åœ¨ä½Žæ¸©ä¸‹ä»ç„¶èƒ½ä¿æŒè¾ƒé«˜çš„æµåŠ¨æ€§ã€?/span> </p> <h2> <b>2<span>ã€?/span><span>DHA</span><span>çš„æ¥æº?/span></b><b></b> </h2> <h3> <b>2.1 <span>‹¹äh´‹åŠ¨ç‰©</span></b><b></b> </h3> <p class="MsoNormal"> <span>‹¹äh´‹é±¼ç±»æ˜¯æå?/span>DHA<span>çš„ä¸»è¦æ¥æºã€‚æ“v产鱼¾cȉ¹åˆ«æ˜¯ä¸­ä¸Šå±‚é±¼¾cÈš„æ²¹è„‚ä¸­å«æœ‰å¤§é‡çš„</span><span>DHA</span><span>åQŒå¦‚鲔鱼ã€ç§‹åˆ€é±¹{€è¿œä¸œæ²™ä¸é±¼çš„æÑaä¸?/span><span>DHA</span><span>çš„å«é‡å‡åœ?/span><span>10%</span><span>以上。目å‰å…¨ä¸–界鱼æÑa的年产é‡åœ?/span><span>100</span><span>万å¨å·¦å³åQŒç†è®ÞZ¸Šä»Žä¸­å¯æå?/span><span>10~25</span><span>万å¨é±¼æÑa。实际上ç”׃ºŽåˆ†ç¦»æŠ€æœ¯ç­‰å› ç´ çš„é™åˆÓž¼Œé±¼æÑa产é‡è¦ä½ŽäºŽä¸Š˜q°æ•°å­—ã€è€Œä¸”æå–的鱼æ²ÒŽœ‰ç›¸å½“大的部分被氧化和渗入人造黄æ²ÒŽˆ–起酥油中被消耗掉åQŒçœŸæ­£å¯ç”¨äºŽåˆ†ç¦»</span><span>DHA</span><span>的鱼油仅å å°‘部分。除此之外还有贾cÕd’Œç”²å£³¾c…R€?/span> </p> <h3> <b>2.2 <span>真茾c?/span></b><b></b> </h3> <p class="MsoNormal"> <span>有许多低¾U§çš„真èŒä¸­å«æœ‰è¾ƒå¤šçš„</span>DHA<span>åQŒå…¶ä¸­è—»çŠ¶èŒ¾cÈš„</span><span>DHA</span><span>å«é‡ž®¤äؓ丰富åQŒæ˜¯˜q›è¡Œ</span><span>DHA</span><span>商业性开å‘çš„æ½œåœ¨æ¥æºã€‚比如高å±Þp¢«å­¢éœ‰ä¸­çš„å å…¶æ€»è„‚肪酸çš?/span><span>15%</span><span>以上åQŒè€Œç ´å›Šå£¶èŒä¸­çš„å æ€»è„‚肪酸的å«é‡å¯é«˜è¾¾</span><span>34%</span><span>ã€?/span> </p> <p class="MsoNormal"> <span>äº?/span>DHA<span>的真èŒä¸»è¦æ˜¯è¾ƒä½Ž¾U§çœŸèŒä¸­çš„藻状èŒåQŒä¸»è¦æœ‰å£¶èŒ¾UÔŒ¼ˆ</span><span>Class Chytridomycetes</span><span>åQ‰ã€åµå›ŠèŒ¾UÔŒ¼ˆ</span><span>ClassOomyceres</span><span>åQ‰ã€éœœéœ‰ç›®åQ?/span><span>OrderPeronosporales</span><span>åQ‰ã€æ°´éœ‰ç›®åQ?/span><span>Ordersaprolegniales</span><span>åQ‰ã€ç»“åˆèŒ¾UÔŒ¼ˆ</span><span>ClassZygomycetes</span><span>åQ‰ã€è™«éœ‰ç›®åQ?/span><span>Order Entomophthorales</span><span>åQ‰ç­‰åQŒç‰¹åˆ«æ˜¯ç ´å›Šå¼§èŒ</span><span>Thraustochytriidae</span><span>åQŒå·²¾læŠ¥é“æœ‰å®ƒçš„</span><span>8</span><span>个属</span><span>30 </span><span>多个èŒç§èƒ½å¤Ÿäº?/span><span>DHA</span><span>ã€?/span> </p> <h3> <b>2.3 <span>‹¹¯‚—»¾c?/span></b><b></b> </h3> <p class="MsoNormal"> <span>许多研究è¯å®žåQŒåœ¨é‡‘è—»¾c…R€ç”²è—ȱ»ã€ç¡…è—ȱ»ã€çº¢è—ȱ»ã€è¤è—ȱ»ã€ç»¿è—ȱ»åŠéšè—ȱ»½{‰æ“vè—ÖM¸­å«æœ‰å¤§é‡çš?/span>DHA<span>。到目å‰ä¸ºæ­¢åQŒå·²‹¹‹å®šäº†ä¸Šç™¾ä¸ªå“ç§å¾®è—»çš„脂肪酸åQŒå…¶ä¸­æŸäº›ç§¾cÈš„‹¹¯‚—»</span><span>DHA</span><span>å«é‡å¯è¾¾</span><span>30%</span><span>以上ã€?/span> </p> <h2> <b>3<span>ã€?/span><span>DHA</span><span>的分¼›Õdˆ¶å¤‡æ–¹æ³?/span></b><b></b> </h2> <p class="MsoNormal"> <span>如何******åœîC»Žé±¼æÑaåŠå…¶ä»–æ“v‹z‹åЍæ¤ç‰©ä¸­åˆ†¼›…R€æµ“¾~?/span>DHA<span>åQŒæ˜¯è„‚肪酸开å‘应用中的难点和关键之一。目å‰ï¼Œå®žéªŒå®¤å’Œå®žé™…生äñ”中应用的和分¼›ÀL–¹æ³•有低温分çñ”法ã€å°¿ç´ åŒ…åˆæ³•ã€æº¶å‰‚æ³•ã€æˆç›æ³•ã€åˆ†å­è’¸é¦æ³•ã€è¶…临界气体èƒå–法ã€è„‚酶法å?*****液相色谱法等。下é¢ç®€è¦ä»‹¾l其中几¿Ué‡è¦çš„分离æ–ÒŽ³•ã€?/span> </p> <h3> <b>3.1 <span>低温分çñ”æ³?/span></b><b></b> </h3> <p class="MsoNormal"> <span>利用ä¸åŒçš„脂肪酸在过å†ähœ‰æœºæº¶å‰‚中的溶解度差异æ¥åˆ†¼›ÀLµ“¾~?/span>DHA<span>。将鱼æÑa溶解åœ?/span><span>1~10</span><span>å€çš„æ— æ°´ä¸™é…®ä¸­ï¼Œòq¶å†·å´è‡³</span><span>-25</span><span>â„ƒä»¥ä¸‹ã€‚æØœåˆæ¶²çš„下层å³å½¢æˆå«æœ‰å¤§é‡é¥±å’Œè„‚肪酸åŠä½Žåº¦ä¸é¥±å’Œè„‚肪酸¾l“æ™¶åQŒè€Œä¸Šå±‚嫿œ‰å¤§é‡é«˜åº¦ä¸é¥±å’Œè„‚è‚ªé…¸çš„ä¸™é…®æº¶æ¶²ã€‚å°†æ··åˆæ¶²è¿‡æ»¤ï¼Œæ»¤æ¶²åœ¨çœŸ½IÞZ¸‹è’”R¦é™¤å޻䏙酮å›_¯å¾—到</span><span>DHA</span><span>å«é‡è¾ƒé«˜çš„é±¼æ²¹åˆ¶å‰‚ã€‚äØ“äº†æé«˜åˆ†¼›ÀL•ˆæžœå¯åœ¨æ— æ°´ä¸™é…®ä¸­æ·ÕdŠ ž®‘é‡äº²æ°´æ€§æº¶å‰‚如水或醇类ã€?/span> </p> <h3> <b>3.2 <span>溶剂æå–æ³?/span></b><b></b> </h3> <p class="MsoNormal"> <span>利用ä¸åŒè„‚肪酸的金属ç›ã€åœ¨æŸç§æœ‰æœºæº¶å‰‚中的溶解度差异æ¥åˆ†ç¦»‹¹“羃</span>DHA<span>。将乙醇ã€é±¼æ²¹åŠ</span><span>NaOH</span><span>æŒ‰ä¸€å®šæ¯”ä¾‹æØœåˆï¼Œç„¶åŽåŠ›çƒ­ä½‰K±¼æ²¹çš‚化。皂化åŽçš„æØœåˆæ¶²¾l压滤分别得到皂液åŠçš‚ç²’ã€‚çš‚æ¶²åœ¨æ…æ‹Œä¸‹åŠ äº?/span><span>H2SO4</span><span>è‡?/span><span>PH</span><span>ä¸?/span><span>1~2</span><span>。分¼›ÖM¸Šå±‚ç²—è„‚è‚ªé…æ€¹™é†‡æØœåˆæ¶²åQŒåŠ çƒ­å›žæ”¶ä¹™é†‡ï¼Œòq¶å夿°´‹z—祖脂肪酸至中性,å›_¾—</span><span>DHA</span><span>å«é‡è¾ƒé«˜çš„精刉™±¼æ²V€?/span> </p> <h3> <b>3.3 <span>ž®¿ç´ åŒ…åˆæ³?/span></b><b></b> </h3> <p class="MsoNormal"> <span>è„‚è‚ªé…æ€¸Žž®¿ç´ çš„结åˆèƒ½åŠ›å–决于其ä¸é¥±å’Œ½E‹åº¦ã€‚脂肪酸的ä¸é¥±å’Œåº¦è¶Šé«˜ã€åˆ™ä¸Žå°¿ç´ çš„¾l“åˆèƒ½åŠ›­‘Šå¼±ã€‚便­¤åŽŸç†å³å¯å°†é¥±å’Œè„‚肪酸ã€ä½Žåº¦ä¸é¥±å’Œè„‚è‚ªé…æ€¸Žé«˜åº¦ä¸é¥±å’Œè„‚肪酸分离开æ¥ã€‚在鱼æÑa中加人尿素甲醇(或乙醇)åŽåŠ çƒ­æØœåˆã€è¿‡æ»¤åƈ用适当溶剂èƒå–滤液åQŒå³å¾—èƒå–液脱去溶剂ã€çœŸ½Iºå¹²ç‡¥åŽå›_¾—åˆ?/span>DHA<span>å«é‡è¾ƒé«˜çš„精刉™±¼æ²V€?/span> </p> <p class="MsoNormal"> <span>ž®¿ç´ åŒ…åˆæ³•是一¿U比较简便有效的分离æ–ÒŽ³•åQŒä½†åœ¨å®žé™…生产中应用æ—Óž¼Œå­˜åœ¨æº¶å‰‚æŸè€—å¤§ã€æŽ’æ°´å’Œå› å°¿ç´ æ·»åŠ ç‰©è€Œå¼•èµïLš„废物处熽{‰é—®é¢˜ã€‚äØ“æ­¤ï¼Œ</span>Kazuhiko<span>å¼€å‘了一¿U尿素包åˆä¸Ž˜qžç®‹¾_ùN¦ç›¸ç»“åˆçš„分离æ–ÒŽ³•åQŒæ—¢è§£å†³äº†ä¸Š˜q°é—®é¢˜ï¼Œåˆé¿å…了鱼æÑa因与½Iºæ°”接触而氧化,˜q˜å¯ä»¥æé«˜åˆ†¼›ÀL•ˆæžœï¼Œé€‚åˆå·¥ä¸šåŒ–生产ã€?/span> </p> <h3> <b>3.4 <span>­‘…äÍ界气体èƒå–法</span></b><b></b> </h3> <p class="MsoNormal">     <span>å›_°†å«æœ‰</span><span>DHA</span><span>的鱼æ²ÒŽº¶è§£äºŽ­‘…äÍ界状æ€çš„</span><span>CO2</span><span>ä¸­ï¼Œé€šè¿‡æ”¹å˜æ¸©åº¦å’ŒåŽ‹åŠ›ï¼Œè¾‘Öˆ°åˆ†ç¦»</span><span>DHA</span><span>的目的。此法能分离出高¾U¯åº¦çš?/span><span>DHA</span><span>åQŒä½†å¯¹ç¢³æ•°ç›¸åŒè€ŒåŒé”®æ•°ä¸åŒçš„脂肪酸的分¼›ÀL•ˆæžœè¾ƒå·®ã€‚äØ“æ­¤ï¼Œå¯åˆ©ç”¨é“¶¼›Õd­èƒ½ä¸ŽåŒé”®¾lœåˆå½¢æˆå¯é€†çš„¾lœåˆç‰©çš„ç‰ÒŽ€§ï¼Œåœ¨è¶…临界</span><span>CO2</span><span>èƒå–装置中增åŠ?/span><span>1</span><span>æ”?/span><span>AgNO3</span><span>åQ硅酸色谱柱åQŒè¾¾åˆ°å°†¼„Ïx•°ç›¸åŒè€ŒåŒé”®æ•°ä¸åŒçš„脂肪酸分离的目的ã€?/span> </p> <p class="MsoNormal">     <span>上述分离æ–ÒŽ³•åŒæ ·é€‚用于通过选择和培å…ÀLŸäº›çœŸèŒå’Œ‹¹¯‚—»æ¥æå?/span><span>DHA</span><span>的途径ã€?/span> </p> <h2> <b>4<span>ã€?/span><span>DHA</span><span>的生ç†åŠŸèƒ?/span></b><b></b> </h2> <h3> <b>4.1 <span>抗å‡è¡€ã€æŠ‘制血栓åÅžæˆ?/span></b><b></b> </h3> <p class="MsoNormal"> DHA<span>能抑制血ž®æ¿å‡é›†åQŒå‡ž®‘血栓素形æˆåQŒä»Žè€Œé¢„防心肌梗塞ã€è„‘梗塞的å‘生。血ž®æ¿åˆæˆçš„血栓素åQ?/span><span>TXA2</span><span>åQ‰å…·æœ‰ä¿ƒ˜q›è¡€ž®æ¿å‡é›†å’Œæ”¶¾~©è¡€½Ž¡çš„作用åQŒè¡€½Ž¡å†…çš®äñ”生的å‰åˆ—腺素åQ?/span><span>PGI2</span><span>åQ‰å…·æœ‰æŠ‘制血ž®æ¿å‡é›†å’Œèˆ’å¼ è¡€½Ž¡çš„作用åQ?/span><span>TXA2 </span><span>å’?/span><span>PGI2 </span><span>之间的åã^衡是调节血ž®æ¿å’Œè¡€½Ž¡åŠŸèƒ½ï¼Œä¿ƒè¿›è¡€æ “åÅžæˆçš„关键ã€?/span><span>TXA2 </span><span>å’?/span><span>PGI2 </span><span>是以èŠÞq”Ÿå››çƒ¯é…¸ï¼ˆ</span><span>AA</span><span>åQ‰äØ“å‰ä½“åQŒé€šè¿‡¼‚·é…¸åŒ–酶的作用从¾l†èƒžè†œç£·é…¸ç”˜æ²šw…¯ä¸­é‡Šæ”‘Ö‡ºæ¥ã€?/span><span>DHA</span><span>å’?/span><span>EPA</span><span>å¯ç«žäº‰æ€§æŠ‘åˆ?/span><span>AA</span><span>å?/span><span>TXA2 </span><span>å’?/span><span>PGI2 </span><span>转化而生æˆ?/span><span>TXA3 </span><span>å’?/span><span>PGI3</span><span>åQ?/span><span>TXA3 </span><span>几乎没有生物‹zÀL€§ï¼Œè€?/span><span>PGI3 </span><span>ä¸?/span><span>PGI2 </span><span>的生ç†åŠŸèƒ½å’Œ‹zÀL€§ç›¸ä¼û|¼Œå› è€Œå‡ž®‘了血ž®æ¿å‡é›†òq¶å¢žåŠ äº†è¡€½Ž¡èˆ’张作用,使血栓åÅžæˆå‡ž®‘。对血栓病患è€?/span><span>,</span><span>å¯ä‹É患者的血ž®æ¿å­˜æ´»æ—‰™—´å»‰™•¿</span><span>,</span><span>è¡€ž®æ¿è®¡æ•°å‡å°‘</span><span>, </span><span>è¡€ž®æ¿å› å­çš„è¡€‹¹†æ°´òq³ä¸‹é™ï¼Œ è¡€‹¹†ä¸­è¡€æ “çƒè›‹ç™½é™ä½ŽåQŒå¯é˜ÀL­¢è¡€ž®æ¿ä¸ŽåŠ¨è„‰å£ç›æ€º’作用åQŒåšg¾~“血栓åÅžæˆã€?/span> </p> <h3> <b>4.2 <span>é™è¡€è„‚ã€é˜²åŠ¨è„‰¼‹¬åŒ–</span></b><b></b> </h3> <p class="MsoNormal"> DHA<span>å¯ä»¥é™ä½Žè¡€æ¸…中甘æÑa三酯生æˆåŠä»Žè‚è„æŽ’å‡ºåQ›é™ä½Žä½Žå¯†åº¦è„‚è›‹ç™½ã€æžä½Žå¯†åº¦è„‚蛋白ã€å¢žåŠ é«˜å¯†åº¦è„‚è›‹ç™½ï¼Œæ”¹å˜è„‚蛋白中脂肪酸的¾l„æˆåQŒä»Žè€Œå¢žåŠ å…¶‹¹åŠ¨æ€§ï¼›å¢žåŠ èƒ†å›ºé†‡çš„æŽ’æ³„åQŒæŠ‘åˆ¶å†…æºæ€§èƒ†å›ºé†‡çš„åˆæˆã€‚因此,å¯ä»¥é¢„防和治疗动脉硬化,寚w«˜è¡€åŽ‹ã€å¿ƒè¡€½Ž¡ç–¾ç—…有一定的æ²È–—作用åQŒè¢«äºø™ª‰ä¸ºâ€œå¿ƒè¡€½Ž¡ç–¾ç—…æ— å¯æ¯”拟的******å“â€ï¼Œæ˜¯è¡€½Ž¡çš„“清é“夫â€ã€?/span> </p> <h3> <b>4.3 <span>抗炎作用</span></b><b></b> </h3> <p class="MsoNormal"> <span>调查å‘现åQŒçˆ±æ–¯åŸºæ‘©äh很少患气½Ž¡ç‚Žã€é£Žæ¹¿æ€§å…³èŠ‚ç‚Ž½{‰æ…¢æ€§ç–¾ç—…,ç”?/span>EPA<span>喂饲ž®é¼ åQŒå…¶å®žéªŒæ€§ç‚Žç—‡çš„æ°´è‚¿½E‹åº¦é™ä½Žã€‚原因:慢性å应物è´?/span><span>SRSA</span><span>是三¿Uç‰¹å¼‚çš„ç™½ä¸‰çƒ¯ï¼Œæ˜¯å˜æ€ååº”ä¸­çš„æ´»æ€§ç‰©è´¨ï¼Œåœ¨è¿‡æ•æ€§å应中调节支气½Ž¡æ”¶¾~©å’Œè¡€½Ž¡é€šé€æ€§ã€‚花生四烯酸促进白三çƒ?/span><span>LTB4</span><span>å½¢æˆåQ?/span><span>LTB4</span><span>有助炎作用;</span><span>DHA</span><span>å’?/span><span>EPA</span><span>å¯ä¿ƒ˜q›ç™½ä¸‰çƒ¯</span><span>LTB5</span><span>å½¢æˆåQŒå®ƒå‡ ä¹Žæ— ç”Ÿç†æ´»æ€§ï¼Œä»Žè€?/span><span>EPA</span><span>å…ähœ‰æŠ—炎作用。用ω</span><span>-PUFA</span><span>防治æŸäº›ç‚Žæ€§ç–¾ç—…如¾c»é£Žæ¹¿æ€§å…³èŠ‚ç‚Žã€å¸¦çжæˆö疹劾U¢æ–‘ã€ç–¤ç–V€å“®å–˜ç­‰å·²å–得良好效果,是一¿Uç†æƒ³çš„功能性食å“原料ã€?/span> </p> <h3> <b>4.4 <span>å¥è„‘作用</span></b><b></b> </h3> <p class="MsoNormal"> DHA <span>是äh脑的主覾l„æˆç‰©è´¨ä¹‹ä¸€åQŒå äºø™„‘è„‚è´¨çš?/span><span>10%</span><span>å·¦å³åQŒåœ¨ä¸€å®šç¨‹åº¦ä¸Šå¯ä»¥æé«˜è„‘的柔èÊY性,抑制脑的è€åŒ–。其在äh脑中主è¦ä»¥ç£·è„‚的形å¼å­˜åœ¨åQŒå­˜åœ¨äºŽå¤§è„‘çš„ç°ç™½è´¨éƒ¨ï¼Œ¼‚¯‚„‚对脑¾l†èƒžçš„åÅžæˆå’Œæž„造è“vé‡è¦ä½œç”¨åQŒå¦‚果缺ž®‘神¾l元的çªèµ·å°±ä¸èƒ½¾l´æŒåQŒæ‰€å½¢æˆçš„网状组¾l‡æ˜“被破å,大脑传递信æ¯å°±ä¸çµåQŒä¹Ÿå½±å“人的智力åQŒè®°å¿†å’Œæ€ç»´èƒ½åŠ›ã€‚åœ¨è„‘ç»†èƒžåÅžæˆçš„˜q‡ç¨‹ä¸­ï¼Œ</span><span>DHA</span><span>有利于脑¾l†èƒž½Hè“vçš„åšgä¼¸å’Œé‡æ–°äº§ç”Ÿã€‚在胎儿时期åQŒä»Žå—ç²¾åµåœ¨æ¯äº²å­å®«å†…分裂开始就需è¦?/span><span>DHA</span><span>åQŒå› æ­¤ï¼Œå­•妇应摄入èƒöé‡çš„</span><span>DHA</span><span>åQŒä»¥ä¿ƒè¿›èƒŽå„¿å¤§è„‘çš„å‘育和脑细胞的增殖。正常情况下åQŒä¸€ä½å­•妇æ¯å¤©åº”æ‘„å…¥</span><span>0.5~1.5 g DHA</span><span>åQˆæ™®é€šäh需è¦?/span><span>0.5~1.0 g</span><span>åQ‰ï¼Œç‰¹åˆ«æ˜¯åœ¨èƒŽå„¿å¤§è„‘å‘育***快的妊娠½W?/span><span>4</span><span>个月臛_©´å„¿å‡ºç”ŸåŽ</span><span>1</span><span>岿œ«æœªå‘育完æˆè¿™ä¸€é‡è¦æ—¶æœŸåQ?/span><span>DHA </span><span>的摄入尤为é‡è¦ã€‚åŒæ øP¼Œòq¹{€ç«¥åŠé’ž®‘年也应该进补,他们正处于接å—大é‡ä¿¡æ¯çš„学习阶段åQŒè¿™å¯¹è„‘¾l†èƒžæ˜¯ä¸€¿U刺‹È€åQŒè¡¥å……能ä¿è¯è„‘细胞çªè§¦åšg长,使神¾l细胞之间蔾pÕdŠ å¼ºï¼Œä¿¡æ¯çš„ä¼ é€’æ›´ä¸ø™¿…速,大脑功能增强åQŒè®°å¿†åŠ›æé«˜ã€‚此外也是è€å¹´äºÞZ¸å¯å¿½è§†çš„è¥å…»ç´ ï¼Œè¡¥å……å¯ä»¥å»¶ç¼“大脑èŽç¾ƒåQŒé˜²æ­¢å¤§è„‘功能衰退和è€å¹´æ€§ç—´å‘†ç—‡å‘生。因而,有äh¿U?/span><span>DHA</span><span>为“脑黄金â€ã€?/span> </p> <h3> <b>4.5 <span>ä¿æŠ¤è§†åŠ›</span></b><b></b> </h3> <p class="MsoNormal"> <span>在äh体儾l„织¾l†èƒžä¸­ï¼Œ</span>DHA <span>å«é‡******的是眼ç›çš„视¾|‘膜¾l†èƒžåQ?/span><span>DHA </span><span>èƒ½ä¿æŠ¤è§†¾|‘è†œã€æ”¹å–„视力。一斚w¢åQ?/span><span>DHA </span><span>能ä‹Éè§†ç½‘è†œä¸Žå¤§è„‘ä¿æŒè‰¯å¥½çš„蔾p»ï¼Œé˜²æ­¢è§†åŠ›å‡é€€åQŒæ”¹å–„视力;å¦ä¸€æ–šw¢åQŒå……­‘³çš„</span><span>DHA</span><span>能防止视¾|‘膜血栓的产生åQŒé˜»æ­¢è„‚è´¨æ¸—å‡ºï¼Œä»Žè€Œå½»åº•æ”¹å–„è§†åŠ›ï¼Œç”šè‡³å¤æ˜Žã€?/span><span>DHA</span><span>çš„å«é‡å‡ž®‘ï¼Œå¯¹å…‰çš„æ•æ„Ÿæ€§å°±é™ä½ŽåQŒè§†åŠ›åˆ™ä¸‹é™ã€?/span> </p> <h3> <b>4.6 <span>作用</span></b><b></b> </h3> <p class="MsoNormal"> <span>æ®æ–‡çŒ®æŠ¥é“英国专家å‘çŽ°åÆˆåˆ†ç¦»å‡ºå¯¼è‡´ç™Œç—‡æ‚£è€…èín体消瘦的一¿U物质。这¿Uåå«å¡å¥‡éžå…‹å› å­çš„物质¾cÖM¼¼è·å°”蒙,˜q™ç§è›‹ç™½è´¨ç»è¡€æ¶²åˆ°è¾¾äh体内脂肪¾l„织åŽï¼Œç›´æŽ¥ä½¿è„‚肪组¾l‡åˆ†è§£ä‹É人消瘦。而鱼油中çš?/span>DHA<span>å’?/span><span>EPA</span><span>å¯é˜»æ»žè¿™¿U蛋白质因å­çš„åÅžæˆï¼Œä½¿è‚¿ç˜¤æ‚£è€…消瘦过½E‹å¾—到逆è{åQŒä»Žè€Œè“v到增强患者体质,˜q›è€Œè“v到抗肿瘤的作用ã€?/span> </p> <h2> <b>5<span>ã€?/span><span>DHA</span><span>çš„åˆæˆã€æ¶ˆåŒ–以åŠä»£è°?/span></b><b></b> </h2> <h3> <b>5.1 <span>å¾®ç”Ÿç‰©åˆæˆ?/span><span>DHA</span><span>的代谢途径</span></b><b></b> </h3> <p class="MsoNormal"> <span>å¾®ç”Ÿç‰©åˆæˆå¤šä»·ä¸é¥±å’Œè„‚肪酔R€šå¸¸æ˜¯åœ¨å•ä¸é¥±å’Œè„‚肪酸基¼‹€ä¸Šå¼€å§‹ï¼Œåˆæˆæœºåˆ¶ä¸Žé«˜½{‰ç”Ÿç‰©ä¸€è‡ß_¼ŒåŒ…括廉™•¿¼„³é“¾å’ŒåŽ»é¥±å’Œä½œç”¨ä¸¤ä¸ª˜q‡ç¨‹åQŒåˆ†åˆ«ç”±ç›¸åº”的膜¾l“åˆå»‰™•¿é…¶å’Œè„±é¥±å’Œé…¶æ‰€å‚¬åŒ–åQŒä‹É¼„³é“¾å¢žé•¿åQ›è„‚肪酸脱饱和体¾pÈ”±å¾®ç²’体膜¾l“åˆçš„细胞色ç´?/span>b5<span>ã€?/span><span>NADH-</span><span>¾l†èƒžè‰²ç´ </span><span>b5</span><span>˜q˜åŽŸé…¶å’Œè„±é¥±å’Œé…¶¾l„æˆã€‚å¾®ç”Ÿç‰©åˆæˆ</span><span>DHA</span><span>是从沚w…¸å¼€å§‹ï¼Œå…¶è„±é¥±å’Œé€”径是Ï?/span><span>- 3</span><span>åQ›ä¾›ä½?/span><span>(</span><span>乙酰</span><span>CoA</span><span>或丙二酰å•é…°</span><span>CoA)</span><span>æä¾›ä¸?/span><span>C</span><span>原å­åQŒåœ¨</span><span>12</span><span>ã€?/span><span>13</span><span>ä½?/span><span>C</span><span>原å­ä¹‹é—´å¼•入一个åŒé”®ï¼Œå½¢æˆäºšæÑa酸,å†åœ¨</span><span>15</span><span>ã€?/span><span>16</span><span>ä½ç¢³åŽŸå­é—´å¼•入一个åŒé”®ï¼Œå½¢æˆ‚Î</span><span>-</span><span>亚麻酸,å†ç»˜q›ä¸€æ­¥çš„¼„³é“¾å»‰™•¿å’Œè„±é¥±å’Œè€ŒåÅžæˆ?/span><span>DHA</span><span>åQŒåÅžæˆè¿‡½E‹å¦‚下:沚w…¸</span><span>(18:1</span><span>â–?/span><span>2)</span><span>→亚沚w…¸</span><span>(18:2</span><span>â–?/span><span>9,12)</span><span>â†?/span><span>a-</span><span>亚麻é…?/span><span>(18:3</span><span>â–?/span><span>9,12,15)</span><span>→二å碳五烯é…?/span><span>EPA (20:5</span><span>â–?/span><span>5,8,11,14,17)</span><span>â†?/span><span>DHA(22:6</span><span>â–?/span><span>4,7,10,13,16,19</span><span>åQ‰ã€?/span> </p> <p class="MsoNormal">   </p> <h3> <b>5.2 DHA<span>çš„æ¶ˆåŒ–å¸æ”¶æ–¹å¼?/span></b><b></b> </h3> <p class="MsoNormal"> DHA<span>åœ¨ä½“å†…çš„æ¶ˆåŒ–å¸æ”¶ä¸Žå…¶ä»–脂肪酸相比åQŒå·®å¼‚很大。以甘æÑa三酯形å¼å­˜åœ¨çš?/span><span>DHA</span><span>ä¸ÞZ¾‹åQŒåœ¨ž®è‚ ä¸­ï¼Œç”˜æÑa三酯被è‚è„分泌的胆ç›ä¹›_Œ–åŽï¼Œåœ¨èƒ°è„‚肪酶和肠脂肪酶的作用下åQŒåˆ†è§£æˆç”˜æÑa二酯ã€ç”˜æ²¹ä¸€é…¯ã€è„‚肪酸和枞®‘é‡ç”˜æÑa。这些水解äñ”ç‰©ä¸Žèƒ†å›ºé†‡ã€æº¶è¡€¼‚¯‚„‚和胆ç›å…±åŒåÅžæˆä¸€¿U水溶性的混åˆå¾®ç²’åQŒç©¿˜q‡å°è‚ ç»’毛表é¢çš„æ°´å±éšœåˆ°è¾‘Ö¾®¾l’毛膜以被动扩散的方å¼è¢«å¸æ”¶åQˆèƒ†ç›é™¤å¤–)ã€?/span> </p> <p class="MsoNormal"> <span>è„‚è´¨åœ¨é±¼ä½“å†…çš„å¸æ”¶å’Œå“ÞZã^åŠ¨ç‰©ä½“å†…çš„å¸æ”¶ç›¸ä¼¹{€‚摄食的脂肪在内腔水解åŽåQŒå•甘æÑaé…¯å’Œæ¸¸ç¦»è„‚è‚ªé…æ€»¥å¾®å›¢çš„åÅžå¼é€šè¿‡æ‰©æ•£ä½œç”¨åœ¨è‚ é“的上皮¾l†èƒžè¢«å¸æ”¶ã€‚在¾_˜è†œ¾l†èƒžå†…釿–°ç»„装æˆç”˜æÑa三酯åQŒåÅžæˆäã^¾pœå¾®¾_’,通过淋巴¾pÈ»Ÿ˜q›å…¥è¡€æ¶²åó@环。而长è”脂肪酸åQ?/span>LFA<span>åQ‰åˆ™åªåœ¨èƒ†ç›ä¹›_Œ–作用下就å¯è¢«å¸æ”¶åQŒå¸æ”¶åŽçš?/span><span>LFA</span><span>ä»éœ€åˆæˆç”˜æÑa三酯å†é€šè¿‡æ·‹å·´˜q›å…¥è¡€æ¶²åó@环。在äºÞZ½“åQŒä¸»è¦é€šè¿‡æ·‹å·´é€”径和é™è„‰é€”径叿”¶</span><span>DHA</span><span>åQŒæœ‰äººæå‡ÞZº†½W¬ä¸‰é€”径å›_二指肠途径ã€?/span> </p> <p class="MsoNormal"> <span>一般æ¥è¯ß_¼ŒçŸ­é“¾è„‚肪酸比镉K“¾è„‚è‚ªé…¸æ˜“äºŽè¢«å¸æ”¶åQŒä¸é¥±å’Œè„‚è‚ªé…¸æ¯”é¥±å’Œè€…æ›´æ˜“è¢«å¸æ”¶ã€‚é±¼¾cÕd¯¹ä¸é¥±å’Œè„‚è‚ªé…¸å’ŒçŸ­é“¾è„‚è‚ªé…¸çš„æ¶ˆåŒ–å¸æ”¶çŽ‡é«˜è¾¾</span>95<span>åQ…,寚w¥±å’Œè„‚è‚ªé…¸å’Œé•¿é“¾è„‚è‚ªé…¸çš„å¸æ”¶çº¦ä¸?/span><span>85</span><span>åQ…ã€?/span> </p> <h3> <b>5.3 <span>å½±å“</span><span>DHA</span><span>æ¶ˆåŒ–å¸æ”¶çš„å› ç´?/span></b><b></b> </h3> <p class="MsoNormal"> <span>首先åQŒæ˜¯è„‚肪酸的¾l„åˆ†å’Œç»“æž„å·®å¼‚å¯¹å…¶è¢«æ¶ˆåŒ–å¸æ”¶çš„媄å“ã€‚æœ‰ç ”ç©¶è€…è®¤ä¸ø™„‚è´¨æ¥æºåŠè„‚肪酸存在的形å¼çš„差异å¯èƒ½ä¼šå½±å“叿”¶ã€åˆ†é…和生物利用。以¼‚¯‚„‚å½¢å¼å­˜åœ¨çš?/span>DHA<span>比以甘æÑa三酯形å¼å­˜åœ¨çš„æ›´æ˜“è¢«å¸æ”¶ã€‚甘油三酯被胰脂肪酶水解æˆ?/span><span>2-</span><span>甘æÑa一¼‚·é…¸å’Œæ¸¸¼›»è„‚肪酸åQŒè€Œç£·è„‚被胰磷酸脂é…?/span><span>A2</span><span>æ°´è§£ç”Ÿæˆæº¶è¡€¼‚¯‚„‚和游¼›»è„‚肪酸åQŒç¦»å­åŒ–的脂肪酸å’?/span><span>2-</span><span>甘æÑa一¼‚·é…¸˜q›å…¥èƒ†æ±å¾®å›¢åŽå’Œ¼‚¯‚„‚å½¢æˆæ°´æº¶æ€§æØœåˆé¢—¾_’ï¼Œæœ‰åŠ©äºŽæ— æžæ€§çš„è„‚ç±»½I¿è¿‡ž®è‚ ¾l’毛表é¢çš„æ°´å±éšœåˆ°è¾¾å¾®ç»’æ¯›è†œè¢«å¸æ”¶ã€?/span> </p> <p class="MsoNormal"> <span>脂肪酸在甘æÑa三酯中的ä½ç½®å†›_®šå…¶æ˜¯ä»?/span>2-<span>甘æÑa一¼‚·é…¸é…¯è¿˜æ˜¯ä»¥æ¸¸ç¦»è„‚肪酸的形å¼è¢«å¸æ”¶ã€‚当</span><span>DHA</span><span>在甘油三é…?/span><span>Sn-2</span><span>ä½ç½®ä¸Šï¼Œå®ƒä»¬***å®ÒŽ˜“è¢«å¸æ”¶ã€‚一般情况下åQŒç£·è„‚代谢é‡å»ºé…¶å¯é€‰æ‹©æ€§åœ°ž®†ä¸é¥±å’Œè„‚肪酸置于甘沚w…¯çš?/span><span>Sn-2</span><span>ä½ç½®</span><span>,</span><span>而将饱和脂肪酸置äº?/span><span>Sn-1</span><span>ä½ç½®ã€?/span> </p> <p class="MsoNormal"> <span>其次åQŒæ˜¯è„‚肪酸所å«çš„åŸºå›¢æˆ–åŒ…å®¹ç‰©çš„äº’ç›æ€½œç”¨å¯¹å…¶è¢«æ¶ˆåŒ–叿”¶çš„媄å“。摄食的¼‚¯‚„‚所å«çš„¼‚·é…¸ç›åŸºå›¢å’Œæ°®åŸºåQˆä¸»è¦æ˜¯¾l´ç”Ÿç´?/span>B<span>å¤åˆä½“)åQŒå¯èƒ½ä¼šåœ¨å‡ ä¸ªä»£è°¢é€”径中互相媄å“;脂肪酸的¼‚¯‚„‚æºï¼ˆæ¥è‡ªé¸¡è›‹è›‹é»„和动物组¾l‡ï¼‰å«æœ‰å¤§é‡çš„胆固醇åQŒä¹Ÿä¼šåª„å“è„‚è‚ªé…¸çš„æ¶ˆåŒ–å¸æ”Óž¼›æ­¤å¤–åQŒè„‚肪酸的消化率˜q˜ä¸Žå®ƒçš„熔点有关åQŒå«ä¸é¥±å’Œè„‚肪酸­‘Šå¤šåQŒç†”点越低,­‘Šå®¹æ˜“消化ã€?/span> </p> <p class="MsoNormal"> <span>æ€ÖM¹‹åQŒåª„å“?/span>DHA<span>æ¶ˆåŒ–å¸æ”¶çš?因素很多åQŒå†…外有之,而且ä¸åŒç‰©ç§å’Œä¸ªä½“之影å“å› ç´ å¯èƒ½ä¼šç›¸å¼‚ï¼Œå…¶æœºç†æ­£åœ¨ç ”½I¶ä¸­ã€?/span> </p> <h3> <b>5.4 DHA<span>在体内的存在形å¼</span></b><b></b> </h3> <p class="MsoNormal"> <span>在哺乛_Š¨ç‰©å’Œæ°´äñ”动物体内åQ?/span>DHA<span>主è¦ä»¥ç£·è„‚åÅžå¼å­˜åœ¨ï¼Œæ¸¸ç¦»è„‚肪酸很ž®‘。磷脂主è¦å­˜åœ¨äºŽ¾l†èƒžè†œä¸­ã€?/span> </p> <p class="MsoNormal"> 5.5 DHA<span>的分解代è°?/span> </p> <p class="MsoNormal"> <span>天然ä¸é¥±å’Œè„‚è‚ªé…¸å¤šäØ“™åºå¼åQŒéœ€è½¬å˜ä¸ºå弿ž„型,æ‰èƒ½è¢?/span>βåQ氧化酶¾pÖM½œç”¨ï¼Œ˜q›ä¸€æ­¥æ°§åŒ–分解。在生物体内åQŒä¸é¥±å’Œè„‚è‚ªé…¸çš„æ°§åŒ–éœ€è¦æ›´å¤šé…¶çš„å‚与æ‰èƒ½é¡ºåˆ©è¿›è¡Œï¼Œç”׃ºŽåŒé”®çš„存在,æ˜?span>DHA</span><span>比饱和åŠå•ä¸é¥±å’Œè„‚肪酸很难氧化分解ã€?/span> </p> <p class="MsoNormal"> n-3<span>脂肪酸的氧化供能åQŒä¸»è¦æ˜¯åœ¨è¿‡æ°§åŒ–物酶体和¾U¿ç²’体中通过β</span><span>-</span><span>氧化˜q›è¡Œã€?/span><span>DHA</span><span>在大鼠è‚中的代谢ä¸èƒ½åœ¨çº¿¾_’体内进行Î?/span><span>-</span><span>氧化åQŒè€Œæ˜¯é€šè¿‡è¢«è¿‡æ°§åŒ–物酶体氧化。äh¾cÈš®è‚¤è¡¨çš®ç»†èƒžå¯¹ä¸é¥±å’Œè„‚肪酸åQ?/span><span>PUFAs</span><span>åQ‰çš„代谢表现出很高的‹zÀL€§ï¼Œçš®è‚¤è¡¨çš®</span><span>15-</span><span>è„‚æ°§åˆé…¶çš„æ´»æ€§éžå¸”R«˜åQŒå¯ž®?/span><span>2-</span><span>é«?/span><span>-</span><span>¾•</span><span>-</span><span>亚麻酸(</span><span>DGLA</span><span>åQ‰è{åŒ–äØ“</span><span>15-</span><span>¾ŸŸåŸºäºŒå¼„³ä¸‰çƒ¯é…¸åQŒå°†</span><span>EPA</span><span>转化ä¸?/span><span>15-</span><span>¾ŸŸåŸºäºŒå¼„³äº”烯酸åQŒå°†</span><span>DHA</span><span>转化ä¸?/span><span>15-</span><span>¾ŸŸåŸºäºŒå¼„›_…­çƒ¯é…¸ã€?/span> </p> <p class="MsoNormal"> DHA<span>被哺乛_Š¨ç‰©å¸æ”¶åŽåQŒç»å¤§éƒ¨åˆ†è¢«¾l“åˆåœ¨ç”˜æ²¹ä¸‰é…¯ã€?/span><span>DHA</span><span>是哺乛_Š¨ç‰©å’Œé±¼ç±»ç”Ÿç‰©è†œçš„é‡è¦¾l„æˆéƒ¨åˆ†å’Œä¸€äº›æ¿€ç´ çš„主è¦å‰ä½“åQ?/span><span>DHA</span><span>òq¶ä¸æ˜¯ä½œä¸ºæœºä½“的主è¦èƒ½é‡æ¥æºåQŒåªæ˜¯åœ¨ç‰Òޮпƒ…况下,如饥饿时其他脂肪酸被大é‡åˆ©ç”¨åŽï¼Œ</span><span>DHA</span><span>æ‰å¯èƒ½ä¼šè¢«æ°§åŒ–分解ã€?/span> </p> <h2> <b>6<span>ã€?/span><span>DHA</span><span>的应用åŠå¼€å‘剿™?/span></b><b></b> </h2> <h3> <b>6.1 <span>医è¯ä¿å¥ç”¨å“</span></b><b></b> </h3> <p class="MsoNormal"> <span>ç”׃ºŽ</span> DHA <span>å’?/span><span>EPA</span><span>å¯å¢žåŠ è„‘éƒ¨ç›Šæ™ºã€ä¿æŠ¤è§†åŠ›ã€é™è¡€è„‚ã€é˜²åŠ¨è„‰¼‹¬åŒ–ã€æŠ—å‡è¡€½{‰ç”Ÿç†åŠŸèƒ½ï¼Œç›®å‰å¸‚场上有大é‡çš„鱼油制å“出售,å…?/span><span>DHA+EPA</span><span>çš„å«é‡åœ¨</span><span>20%~80%</span><span>之间。一般æ¯å¤©æœç”?/span><span>DHA+EPA</span><span>¾U?/span><span>1 g</span><span>会äñ”生很好的ä¿å¥æ•ˆæžœã€?/span> </p> <h4> <b>6.1.1 DHA<span>é±¼æÑa胶囊</span></b><b></b> </h4> <p class="MsoNormal"> <span>ç›®å‰åQŒåœ¨å›½å†…外市åœÞZ¸ŠåQ?/span>DHA<span>å’?/span><span>EPA</span><span>的主è¦äñ”哿˜¯é±¼æÑa胶丸åQŒå…¶å«é‡ä¸?/span><span>30</span><span>åQ…å·¦åŸë€?/span> </p> <h4> <b>6.1.2 DHA<span>乙酯胶囊</span></b><b></b> </h4> <p class="MsoNormal"> <span>该äñ”å“主è¦å°†å¯Œå«</span>DHA<span>çš„æÑa与乙醇进行醋化,生æˆ</span><span>DHA</span><span>的乙醋,¾læ¾U¯åŽåQŒå«é‡å¯è¾?/span><span>90</span><span>åQ…ä»¥ä¸Šï¼Œä½œäØ“åŒ»è¯å“ä‹É用,售ä­hæ¯å…‹è¾?/span><span>1</span><span>万日以上ã€?/span> </p> <h5> <b>6.1.3 DHA<span>甲酯胶囊</span></b><b></b> </h5> <p class="MsoNormal"> <span>ä¸»è¦æ˜¯å°†å¯Œå«</span>DHA<span>çš„æÑa˜q›è¡Œç”²é†‹åŒ?/span><span>, </span><span>从而得åˆ?/span><span>DHA</span><span>甲醋型鱼油制剂胶丸,å«é‡å¯è¾¾</span><span>60</span><span>åQ?/span><span>~70</span><span>åQ…ã€?/span> </p> <h5> <b>6.1.4 <span>微胶囊化</span><span>DHA</span></b><b></b> </h5> <p class="MsoNormal"> <span>该äñ”å“主è¦å°†å¯†å°äº?/span>20~30<span>μ</span><span>m</span><span>微粒å­ä¸­ã€‚胶囊的制法是将å?/span><span>DHA</span><span>的精刉™±¼æ²V€äã^åŒ–å‰‚ã€æŠ—æ°§åŒ–å‰‚ã€çމ¾cŒ™›‹ç™½åŠæœ‰å­”æ·€¾_‰ç­‰æ··åˆè°ƒåˆ¶åŽï¼ŒåŠ å…¥ä¹™é†‡ã€æ°´åQŒå†é«˜æ¸©å¾®ç²‰æœ«åŒ–。äñ”å“ç‰¹ç‚¹äØ“æ°§åŒ–½E›_®šæ€§å¥½åQŒè´®å­˜å¤©</span><span>14</span><span>å?/span><span>pov</span><span>ä¸ä¸Šå‡ï¼Œ</span><span>DHA</span><span>å«é‡æ— å‡ž®‘。è€é«˜æ¸©ï¼Œ</span><span>180</span><span>℃加热åŽè´®å­˜</span><span>, </span><span>上述数值没有什么å˜åŒ?/span><span>, </span><span>消化性能很好ã€?/span> </p> <h4> <b>6.1.5 DHA<span>ä¸ÞZ¸»çš„ä¿å¥è¥å…»é¥®æ–?/span></b><b></b> </h4> <p class="MsoNormal"> <span>日本莱新è¯å…¬å¸åˆ¶æˆæ— é±ÆD…¥å‘³ä¸”å®ÒŽ˜“饮用çš?/span>DHA<span>ä¿å¥è¥å…»é¥®æ–™ã€‚æ ¹æ®åŠ¨ç‰©å®žéªŒçš„¾l“æžœ</span><span>, </span><span>å¾—å‡ºäººç±»æ¯æ—¥™åÀL‘„å?/span><span>0.5~1.0g DHA</span><span>。该公å¸ç ”制çš?/span><span>DHA</span><span>饮料æ¯ç“¶</span><span>500mL</span><span>åQŒä­hæ ?/span><span>300</span><span>å?/span><span>500</span><span>日元二ç§ã€‚äñ”å“中除å«</span><span>DHA</span><span>å¤–ï¼Œä¹Ÿå«æœ?/span><span>EPA</span><span>ã€ç‚÷è‹æÑaã€çº¢èбæÑaã€å¤©ç„¶ç»´ç”Ÿç´ ã€èœ‚王äã^ã€å¤§è’œç²¾ã€èƒ¡¾|—åœç´ ã€ähå‚ç²¾ã€èŒ¶å¶èƒå–物ã€èœ‚蜜ã€è‘¡è„ç³–ã€æžœ¾p–ç­‰ã€?/span> </p> <h4> <b>6.1.6 DHA<span>¾_‰æœ«</span></b><b></b> </h4> <p class="MsoNormal"> <span>ž®†é±¼æ²¹ç²¾åˆ¶åŽåˆ¶æˆåŒ–学性能½E›_®šçš?/span>DHA<span>¾_‰æœ«ã€‚寞®†è¯¥äº§å“直接æ·ÕdŠ åˆîCh造奶æ²V€è›‹é»„é…±ã€å†°æ·‡æ·‹å’Œé¢åŒ…等功能性食å“中厅R€?/span> </p> <h3> <b>6.2 <span>食å“工业</span></b><b></b> </h3> <p class="MsoNormal"> <span>ç›®å‰åQŒå›½é™…上已开å‘出äº?/span> DHA <span>å’?/span><span>EPA </span><span>婴儿奶粉åQ?/span><span>DHA </span><span>饮料åQŒå¯Œå?/span><span>DHA </span><span>å’?/span><span>EPA</span><span>的鸡蛋ã€é¦™è‚ ã€ç½å¤´ç­‰å¤šç§é£Ÿå“ã€?/span> </p> <h4> <b>6.2.1 DHA<span>é…±æÑa</span></b><b></b> </h4> <p class="MsoNormal"> <span>日本相模中央化学研究所和洼田味增酱油公å¸å…±åŒç ”½I¶å¼€å‘出å?/span>DHA<span>æˆä†¾çš„é…±æ²ÒŽ–°äº§å“ã€‚é±¼æ²¹ä¸­çš„é±¼è…¥å‘³ä¸€èˆ¬å¾ˆéš¾è„±é™¤ï¼Œä½†é…±æ²¹ä¸­å«æœ‰ä¸€¿Uç§°ä¹‹äØ“â€œæ›²é…¸â€çš„æˆä†¾å…ähœ‰æ¶ˆé™¤è…¥è‡­å‘³çš„åŠŸèƒ½ã€‚äØ“æ­?/span><span>, DHA</span><span>æˆä†¾æ·ÕdŠ å…¥é…±æ²¹ä¸­åQŒè…¥è‡­æˆä»½ä¾¿è‡ªç„¶æ¶ˆå‡</span><span>, </span><span>òq¶åˆ©ç”¨äã^化剂½{‰è§£å†³äº†</span><span>DHA</span><span>é±¼æÑa的上‹¹®çŽ°è±¡ã€?/span> </p> <h4> <b>6.2.2 DHA<span>的婴儉K…方奶¾_?/span></b><b></b> </h4> <p class="MsoNormal"> <span>明治乳业股䆾公å¸è‡?/span>1987<span>òq´å°±å¼€å§‹é”€å”®æ·»åŠ äº†</span><span>DHA</span><span>æ²¹çš„å©´å„¿é…æ–¹å¥¶ç²‰ã€‚æ¯ä¹³ä¸­å«çš„</span><span>DHA</span><span>å«é‡éšç€æ¯äº²çš„饮食ä¸åŒè€Œæœ‰å¾ˆå¤§å·®å¼‚ã€?/span><span>FAO/WHO</span><span>ä¸ÞZº†ä½¿å©´òq¼å„¿çš„大脑åŠè„‘网膜等å‘育正常</span><span>, </span><span>把高度ä¸é¥±å’Œè„‚è‚ªé…¸çš„æ‘„å–æ¯”例标准规定为Ï?/span><span>-6</span><span>¾p?/span><span>/</span><span>ω</span><span>-3</span><span>¾p…R€?/span> </p> <p class="MsoNormal"> 除此之外åQŒçŽ°åœ¨å·²å¼€å‘和正在开å‘的产哘q˜æœ‰åQŒç”¨å„ç§¾l´ç”Ÿç´ ã€çŸ¿ç‰©è´¨ã€å¿…需氨基酸相¾l“åˆçš„饮料食å“,如病äºÞZ¸“用饮料ã€å„¿ç«¥äã^é…¸èŒé¥®æ–™ã€‚用¾U¤ç»´¾cÈ»„åˆçš„æ–¹ä¾¿é£Ÿå“ã€ç—…åŽåº·å¤é£Ÿå“。用于鱼¾p•ã€é±¼é¦™è‚ ä¹‹ç±»é±¼åˆ¶å“制æˆçš„高çñ”食å“ã€æé«˜æ°´äº§è´¾cȽ头的附加倹{€‚添加到牛奶ã€é…¸ä¹³é…ªã€èƒšèŠ½ç­‰é£Ÿå“中ã€?</p> <h3> <b>6.3 <span>饲料工业</span></b><b></b> </h3> <p class="MsoNormal"> <span>淡水鱼类喂富å?/span> DHA <span>的饲料,å¯å¤§å¤§æé«˜å…¶</span><span>DHA</span><span>å«é‡åQŒä»Žè€Œæé«˜å…¶å“è´¨åQ›å…»ŒD–富å?/span><span>DHA</span><span>çš„æ“vè—ÖM½œæˆé¥²æ–™ï¼Œž®†å¾ˆæœ‰å‰é€”,日本人用å?/span><span>DHA</span><span>的鱼¾_‰å–‚æ¯é¸¡åQŒç»“果生产出了富å?/span><span>DHA</span><span>的鸡蛋—“å¥è„‘蛋â€ã€?/span> </p> <p class="MsoNormal">   <h1> <b>二ã€DHA生äñ”工艺研究</b><b></b> </h1> <h2> <b>1ã€ä»Žé±¼æÑa中获得DHA</b><b></b> </h2> <p class="MsoNormal"> DHAä¸»è¦æ˜¯ä»Žé±¼æÑa中分¼›Õdˆ¶å¤‡ï¼Œå…ähœ‰ä»£è¡¨æ€§çš„æ²™ä¸é±û|¼Œé‡‘枪鱹{€é»„金鱼和肥壮金枪鱼。但DHAå«é‡é«˜ä¸”å¯ä½œä¸ºæå–DHA原料的是金枪鱼和铉K±¼æ²V€? </p> <p class="MsoNormal"> 从鱼眼çªè„‚è‚ªé…æ€¸­æå–DHA的工艺如下: </p> <p class="MsoNormal"> 鱼头——摘出眼½H脂肪——分煮沸抽æâ€”—æÑa层分¼› Z€”—脱腊——脱艜y€”—脱臭——精制DHAæ²? </p> <p class="MsoNormal"> 但是éšç€æ¸”业资æºçš„æ—¥æ¸ç´§¾~ºï¼Œä»Žé±¼æ²¹ä¸­æå– DHA时也é¢äÍç€ä¸€äº›é—®é¢˜ï¼šåQ?åQ‰ä»Žé±¼æÑa中æå–çš„DHA因胆固醇å«é‡é«˜ï¼Œòq¶ä¸”å¸¦æœ‰é±ÆD…¥å‘»I¼Œæžå¤§åœ°åª„å“了产å“çš„å“质; </p> <p class="MsoNormal"> åQ?åQ‰é±¼æ²¹ä¸­DHAçš„å«é‡åˆæ˜¯éšç€é±¼çš„¿Uç±»ã€å­£èŠ‚ã€åœ°ç†ä½¾|®ä»¥åŠäh¾cÈš„æ•æžæ—‰™—´½{‰æ¡ä»¶çš„å˜åŒ–而å˜åŒ–ï¼› </p> <p class="MsoNormal"> åQ?åQ‰åœ¨å¯šw±¼æ²¹è¿›è¡ŒåŠ å·¥è¿‡½E‹ä¸­çš„æ°¢åŒ–处ç†å·¥è‰ºé™ä½Žäº†é±¼æÑa中的DHA产é‡åQŒé€ æˆäº†DHä¸å¿…è¦çš„‹¹ªè´¹åQ? </p> <p class="MsoNormal"> åQ?åQ‰ç”±äºŽä¸€èˆ¬é±¼æ²¹ä¸­çš„DHAå«é‡ä¸æ˜¯å¾ˆé«˜åQŒåŒæ—¶è¿˜å«æœ‰å¤§é‡å…¶ä»–饱和åŠä½Žä¸é¥±å’Œçš„脂肪酸,因而浓¾~©è¾ƒä¸ºå›°éš¾ï¼ŒåŠ å·¥å¤„ç†˜q‡ç¨‹å¤æ‚åQŒä»Žè€Œæé«˜äº†DHA生äñ”çš„æˆæœ¬ï¼Œä½¿å¾—DHAçš„ä­hæ ¼æžä¸ºæ˜‚è´üc€‚故从鱼油中分离得到的DHA无论是数é‡è¿˜æ˜¯è´¨é‡éƒ½éš¾ä»¥æ»¡èƒö½C¾ä¼šçš„需求,å¦å¤–从鱼油中¾U¯åŒ–得到的DHA˜q˜å…·æœ‰ä¸€å®šçš„隑ֺ¦ã€‚从而寻求廉ä»ïLš„DHAç”Ÿç‰©èµ„æºæå–çš„å¯æ›¿ä»£çš„æ–°é€”径å—到国内外学者的òq¿æ³›å…Ïx³¨ã€? </p> <h2> <b>2ã€å¾®ç”Ÿç‰©åˆæˆDHA</b><b></b> </h2> <p class="MsoNormal"> éšç€ç ”ç©¶çš„ç‘ô¾l­æ·±å…¥ï¼ŒDHA新的生ç†åŠŸæ•ˆåŠä½œç”¨æœºç†ä¸æ–­è¢«å‘现和歽Cºï¼Œòq¶ä¸”ä¸å°‘学者å‘现许多秾cÈš„‹¹äh´‹å¾®è—»ä»¥åŠ‹¹äh´‹çœŸèŒéƒ½èƒ½è‡ªèínåˆæˆDHAåQŒåƈ且其相对å«é‡˜qœè¿œé«˜äºŽé±¼æÑa中的DHAå«é‡åQŒè€ŒDHAå«é‡ä¸°å¯Œå¤šé›†ä¸­äºŽ‹¹äh°´é‡‘è—»ã€ç”²è—…R€éšè—…R€ç¡…è—È­‰‹¹ïL”Ÿå¼‚养微藻以劋¹äh´‹çœŸèŒä¸­çš„破囊壶èŒå’Œè£‚ŒD–壶èŒä¸­åQŒè€Œä¸”主è¦ä»¥å‚¨å­˜æÑa和膜脂åÅžå¼å­˜åœ¨ã€? </p> <h3> <b>2.1 ä»Žå¾®è—ÖM¸­èŽ·å¾—DHA</b><b></b> </h3> <p class="MsoNormal"> ç›®å‰ä»Žæ“v‹z‹å¾®è—ÖM¸­æå–多ä¸é¥±å’Œè„‚肪酸的工艺˜q˜å¤„于实验室阶段åQŒç›®å‰ä¸»è¦é‡‡å–以下的步骤åQšè—»ä½“收集——冷å†Õd¹²ç‡¥â€”—脂肪酸èƒå–——脂肪酸转酯化—â€?分离——纯化ã€? </p> <h3> <b>2.2   çœŸèŒå‘酵生äñ”DHA</b><b></b> </h3> <p class="MsoNormal"> 利用真èŒå‘酵生äñ” DHA的研½I¶ä¸»è¦é›†ä¸­åœ¨ç ´å›Šå£¶èŒThraustochytrium和裂ŒD–壶èŒSchizochytriumåQŒäºŒè€…凿¥è‡ª‹¹äh´‹åQŒæ˜¯æœ‰è‰²ç´ å’Œå…·å…‰åˆºæ¿€ç”Ÿé•¿ç‰ÒŽ€§çš„‹¹ïL”ŸçœŸèŒã€‚利用真èŒå‘é…는Ÿäº§DHAå¯ä»¥å…‹æœä»Žé±¼æ²¹èŽ·å?nbsp;DHA的中‘»I¼Œèƒ½å¤ŸäºÞZؓ控制影å“å› ç´ åQŒä¿æŒDHA产é‡å’Œå«é‡çš„½E›_®šã€‚真èŒå‘é…는Ÿäº§DHAæ—Óž¼Œä¸€èˆ¬åˆæˆEPAåŠå…¶ä»–多ä¸é¥±å’Œè„‚肪酸较少åQŒè¿™æœ‰åˆ©äºŽDHA的分¼›ÀLµ“¾~©ï¼Œåˆ¶å¤‡é«˜çº¯åº¦DHAã€? </p> <p class="MsoNormal"> 微生物å‘é…는Ÿäº§DHA的研½I¶å·²¾lå–得一定的˜q›å±•åQŒä½†˜q˜å­˜åœ¨ä»¥ä¸‹çš„问题åQšï¼ˆ1åQ‰ç¼ºä¹é«˜äº§DHAçš?*****èŒç§åQŒåœ¨å‘é…µ˜q‡ç¨‹ä¸­èŒä½“生镉K€ŸçŽ‡ä½Žï¼Œå…¶è„‚è´¨å«é‡å’ŒDHAå«é‡ä¸é«˜åQ? </p> <p class="MsoNormal"> åQ?åQ‰DHA微生物å‘é…늠”½I¶å¤§å¤šåœç•™åœ¨å®žéªŒå®¤çš„æ‘‡ç“¶é˜¶æ®µåQŒæ²¡æœ‰å¤§è§„模实现工业化生产; </p> <p class="MsoNormal"> åQ?åQ‰ä»Žå¾®ç”Ÿç‰©å‘é…‰|¶²ä¸­æå–DHA的方法还有待于进一步改˜q›ï¼Œä»¥é€‚应于工业化的需è¦ï¼› </p> <p class="MsoNormal"> åQ?åQ‰å°šéœ€æŽ¢çƒ¦å¾®ç”Ÿç‰©å¯åˆ©ç”¨çš„廉价底物,以é™ä½Žå…¶ç”Ÿäñ”æˆæœ¬ã€? </p> <p class="MsoNormal"> 因此当å‰***˜q«åˆ‡çš„ä“Q务是从自然界微生物资æºä¸­½{›é€‰é«˜äº§DHAçš?*****èŒç§åQŒåŠ å¼ºå¯¹DHAçš„å‘é…‰|¡ä»Óž¼Œä»£è°¢è°ƒæŽ§å’Œå·¥è‰ºçš„研究ã€? </p> <p class="MsoNormal"> ç†è®ºåˆ†æž </p> <h2> <b>3ã€åŸºæœ¬å‘酵工è‰?/b><b></b> </h2> <p class="MsoNormal"> 工业å‘酵是利用微生物的生长和代谢‹zÕdЍæ¥ç”Ÿäº§å„¿U有用物质的一门现代工业,而现代å‘酵工½E‹åˆ™æ˜¯æŒ‡ç›´æŽ¥æŠŠå¾®ç”Ÿç‰©åQˆæˆ–动æ¤ç‰©ç»†èƒžï¼‰åº”用于工业生产的一¿U技术体¾p»ï¼Œæ˜¯åœ¨åŒ–学工程中结åˆäº†å¾®ç”Ÿç‰©ç‰¹ç‚¹çš„一门学¿U‘。因而å‘酵工½E‹æœ‰æ—¶ä¹Ÿ¿UîC½œå¾®ç”Ÿç‰©å·¥½E‹ã€? </p> <h3> <b>3.1 åŸºæœ¬æ¦‚念</b><b></b> </h3> <h4> <b>3.1.1 å‘酵一è¯çš„æ¥æº</b><b></b> </h4> <p class="MsoNormal"> å‘酵现象早已被äh们所认识åQŒä½†äº†è§£å®ƒçš„æœ¬è´¨å´æ˜¯˜q?00òq´æ¥çš„事。英语中å‘酵一è¯fermentation是从拉ä¸è¯­fervere‹z„¡”Ÿè€Œæ¥çš„,原æ„为“翻è…ä€ï¼Œå®ƒæ˜q°é…µæ¯ä½œç”¨äºŽæžœæ±æˆ–麦芽浸出液时的现象。沸腄¡Ž°è±¡æ˜¯ç”±æµ¸å‡ºæ¶²ä¸­çš„¾p–在¾~ºæ°§æ¡äšg下é™è§£è€Œäñ”生的二氧化碳所引è“v的。在生物化学中把酉|¯çš„æ— æ°§å‘¼å¸è¿‡½E‹ç§°ä½œå‘é…üc€‚我们现在所指的å‘酵早已赋予了ä¸åŒçš„å«ä¹‰ã€‚å‘é…‰|˜¯ç”Ÿå‘½ä½“所˜q›è¡Œçš„化学å应和生ç†å˜åŒ–åQŒæ˜¯å¤šç§å¤šæ ·çš„生物化学å应根æ®ç”Ÿå‘½ä½“本èín所å…ähœ‰çš„é—ä¼ ä¿¡æ¯å޻䏿–­åˆ†è§£åˆæˆåQŒä»¥å–å¾—èƒ½é‡æ¥ç»´æŒç”Ÿå‘½æ´»åŠ¨çš„˜q‡ç¨‹ã€‚å‘é…µäñ”物是指在å应˜q‡ç¨‹å½“中或å应到辄¡»ˆç‚ÒŽ—¶æ‰€äº§ç”Ÿçš„能够调节代谢ä‹É之达到åã^衡的物质。实际上åQŒå‘é…µä¹Ÿæ˜¯å‘¼åæ€½œç”¨çš„一¿U,åªä¸˜q‡å‘¼å怽œç”?**¾lˆç”ŸæˆCO2和水åQŒè€Œå‘é…?**¾lˆæ˜¯èŽ·å¾—å„ç§ä¸åŒçš„代谢äñ”物。因而,çŽîC»£å¯¹å‘é…늚„定义应该是:通过微生物(或动æ¤ç‰©¾l†èƒžåQ‰çš„生长培养和化学å˜åŒ–,大é‡äº§ç”Ÿå’Œç§¯ç´¯ä¸“门的代谢产物的å应过½E‹ã€? </p> <h4> <b>3.1.2 å‘酵的定ä¹?/b><b></b> </h4> <p class="MsoNormal"> åQ?åQ‰ç‹­ä¹?“å‘é…µâ€çš„定义 </p> <p class="MsoNormal"> 在生物化学或生ç†å­¦ä¸Šå‘酵是指微生物在无氧æ¡äšg下,分解å„ç§æœ‰æœºç‰©è´¨äº§ç”Ÿèƒ½é‡çš„一¿Uæ–¹å¼ï¼Œæˆ–者更严格地说åQŒå‘é…‰|˜¯ä»¥æœ‰æœºç‰©ä½œäؓ电å­å—体的氧化还原äñ”能å应。如葡脾p–在无氧æ¡äšg下被微生物利用äñ”生酒¾_‘ÖÆˆæ”‘Ö‡ºäºŒæ°§åŒ–ç¢³ã€‚åŒæ—¶èŽ·å¾—èƒ½é‡ï¼Œä¸™é…®é…¸è¢«˜q˜åŽŸä¸ÞZã^酸而获得能é‡ç­‰½{‰ã€? </p> <p class="MsoNormal"> åQ?åQ‰å¹¿ä¹?“å‘é…µâ€çš„定义 </p> <p class="MsoNormal"> 工业上所¿U°çš„å‘酵是泛指利用生物细胞制造æŸäº›äñ”哿ˆ–净化环境的˜q‡ç¨‹åQŒå®ƒåŒ…括厌氧培养的生产过½E‹ï¼Œå¦‚é…’¾_¾ã€ä¸™é…®ä¸é†‡ã€äã^酸等åQŒä»¥åŠé€šæ°”åQˆæœ‰æ°§ï¼‰åŸ¹å…»çš„生产过½E‹ï¼Œå¦‚æŠ—ç”Ÿç´ ã€æ°}基酸ã€é…¶åˆ¶å‰‚½{‰çš„生äñ”。äñ”å“峿œ‰ç»†èƒžä»£è°¢äñ”物,也包括èŒä½“细胞ã€é…¶½{‰ã€? </p> <h3> <b>3.2 å‘酵的特ç‚?/b><b></b> </h3> <p class="MsoNormal"> å‘酵和其他化学工业的******区别在于它是生物体所˜q›è¡Œçš„化学å应。其主è¦ç‰¹ç‚¹å¦‚下åQ? </p> <p class="MsoNormal">     åQ?åQ‰å‘酵过½E‹ä¸€èˆ¬æ¥è¯´éƒ½æ˜¯åœ¨å¸¸æ¸©å¸¸åŽ‹ä¸‹è¿›è¡Œçš„ç”Ÿç‰©åŒ–å­¦å应åQŒååº”å®‰å…¨ï¼Œè¦æ±‚æ¡äšg也比较简å•ã€? </p> <p class="MsoNormal">     åQ?åQ‰å‘é…‰|‰€ç”¨çš„原料通常以淀¾_‰ã€ç³–蜜或其他农副产å“ä¸ÞZ¸»åQŒåªè¦åР入少é‡çš„æœ‰æœºå’Œæ— æœºæÛæºå°±å¯è¿›è¡Œå应。微生物因ä¸åŒçš„¾cÕdˆ«å¯ä»¥æœ‰é€‰æ‹©åœ°åŽ»åˆ©ç”¨å®ƒæ‰€éœ€è¦çš„è¥å…»ã€‚基于这—特性,å¯ä»¥åˆ©ç”¨åºŸæ°´å’ŒåºŸç‰©ç­‰ä½œäØ“å‘酵的原料进行生物资æºçš„æ”šw€ å’Œæ›´æ–°ã€? </p> <p class="MsoNormal">     åQ?åQ‰å‘酵过½E‹æ˜¯é€šè¿‡ç”Ÿç‰©ä½“çš„è‡ªåŠ¨è°ƒèŠ‚æ–¹å¼æ¥å®Œæˆçš„åQŒå应的专一性强åQŒå› è€Œå¯ä»¥å¾—到较为å•—的代谢产物ã€? </p> <p class="MsoNormal">     åQ?åQ‰ç”±äºŽç”Ÿç‰©ä½“本èín所å…ähœ‰çš„å应机åˆÓž¼Œèƒ½å¤Ÿä¸“一性地和高度选择性地å¯ÒŽŸäº›è¾ƒä¸ºå¤æ‚的化åˆç‰©è¿›è¡Œç‰¹å®šéƒ¨ä½åœ°æ°§åŒ–ã€è¿˜åŽŸç­‰åŒ–å­¦è½¬åŒ–å应åQŒä¹Ÿå¯ä»¥äº§ç”Ÿæ¯”è¾ƒå¤æ‚的高分å­åŒ–åˆç‰©ã€? </p> <p class="MsoNormal">     åQ?åQ‰å‘酵过½E‹ä¸­å¯ÒŽ‚èŒæ±¡æŸ“的防治臛_…³é‡è¦ã€‚除了必™åÕd¯¹è®‘Ö¤‡˜q›è¡Œä¸¥æ ¼æ¶ˆæ¯’处ç†å’Œç©ºæ°”过滤外åQŒå应必™åÕdœ¨æ— èŒæ¡äšg下进行。如果污染了æ‚èŒåQŒç”Ÿäº§ä¸Šž®Þp¦é­åˆ°å·¨å¤§çš„绋¹ŽæŸå¤±ï¼Œè¦æ˜¯æ„ŸæŸ“了噬èŒä½“åQŒå¯¹å‘é…µž®×ƒ¼šé€ æˆæ›´å¤§çš„å±å®Ÿë€‚å› è€Œç»´æŒæ— èŒæ¡ä»¶æ˜¯å‘é…µæˆèÓ|的关键ã€? </p> <p class="MsoNormal">     åQ?åQ‰å¾®ç”Ÿç‰©èŒç§æ˜¯è¿›è¡Œå‘é…늚„æ ÒŽœ¬å› ç´ åQŒé€šè¿‡å˜å¼‚和茿U筛选,å¯ä»¥èŽ·å¾—é«˜äñ”çš„ä¼˜è‰¯èŒæ ªåƈ使生产设备得到充分利用,也å¯ä»¥å› æ­¤èŽ·å¾—æŒ‰å¸¸è§„æ–ÒŽ³•难以生äñ”çš„äñ”å“ã€? </p> <p class="MsoNormal">     åQ?åQ‰å·¥ä¸šå‘酵与其他工业相比åQŒæŠ•资少åQŒè§æ•ˆå¿«åQŒå¼€å¯ä»¥å–得显著的绋¹Žæ•ˆç›Šã€? </p> <p class="MsoNormal">     åŸÞZºŽä»¥ä¸Šç‰¹ç‚¹åQŒå·¥ä¸šå‘é…‰|—¥ç›Šå¼•èµ·äh们é‡è§†ã€‚和传统的å‘酵工艺相比,çŽîC»£å‘酵工程除了上述的å‘é…늉¹å¾ä¹‹å¤–更有其优越性。除了ä‹É用微生物外,˜q˜å¯ä»¥ç”¨åЍæ¤ç‰©ç»†èƒžå’Œé…Óž¼Œä¹Ÿå¯ä»¥ç”¨äººå·¥æž„å¾çš„“工½E‹èŒâ€™æ¥˜q›è¡Œå应åQ›å应设备也ä¸åªæ˜¯å¸¸è§„çš„å‘é…µ¾|,而是以儿U儿 ïLš„生物å应器而代之,自动化连¾l­åŒ–½E‹åº¦é«˜ï¼Œä½¿å‘é…‰|°´òq›_œ¨åŽŸæœ‰åŸºç¡€ä¸Šæœ‰æ‰€æé«˜å’Œå’Œåˆ›æ–°ã€? </p> <h3> <b>3.3 å‘酵的类åž?/b><b></b> </h3> <p class="MsoNormal"> æ ÒŽ®å‘酵的特点和微生物对氧的ä¸åŒéœ€è¦ï¼Œå¯ä»¥ž®†å‘酵分æˆè‹¥òq²ç±»åž‹ï¼š </p> <p class="MsoNormal"> åQ?åQ‰æŒ‰å‘酵原料æ¥åŒºåˆ†ï¼š¾p–类物质å‘é…µã€çŸ³æ²¹å‘é…µåŠåºŸæ°´å‘é…µ½{‰ç±»åž‹ã€? </p> <p class="MsoNormal"> åQ?åQ‰æŒ‰å‘酵产物æ¥åŒºåˆ†ï¼šå¦‚æ°}基酸å‘é…µã€æœ‰æœºé…¸å‘é…µã€æŠ—ç”Ÿç´ å‘é…µã€é…’¾_‘Ö‘é…üc€ç»´ç”Ÿç´ å‘é…µ½{‰ã€? </p> <p class="MsoNormal"> åQ?åQ‰æŒ‰å‘酵形弿¥åŒºåˆ†ï¼Œåˆ™æœ‰åQšå›ºæ€å‘酵和深层液体å‘é…µã€? </p> <p class="MsoNormal"> åQ?åQ‰æŒ‰å‘酵工艺‹¹ç¨‹åŒºåˆ†åˆ™æœ‰åQšåˆ†æ‰¹å‘é…üc€è¿ž¾l­å‘酵和‹¹åŠ å‘é…µã€? </p> <p class="MsoNormal"> åQ?åQ‰æŒ‰å‘é…µ˜q‡ç¨‹ä¸­å¯¹æ°§çš„ä¸åŒéœ€æ±‚æ¥åˆ†ï¼Œä¸€èˆ¬å¯åˆ†äØ“åQšåŽŒæ°§å‘酵和通风å‘酵两大¾cÕdž‹ã€? </p> <h3> <b>3.4 å‘é…µ˜q‡ç¨‹çš„组æˆéƒ¨åˆ?/b><b></b> </h3> <h4> <b>3.4.1 å‘é…µ˜q‡ç¨‹çš„组æˆ?/b><b></b> </h4> <p class="MsoNormal"> 除æŸäº›è{化过½E‹å¤–åQŒå…¸åž‹çš„å‘é…µ˜q‡ç¨‹å¯ä»¥åˆ’分æˆå…­ä¸ªåŸºæœ¬ç»„æˆéƒ¨åˆ†ï¼š </p> <p class="MsoNormal"> åQ?åQ‰ç¹ŒD–ç§å­å’Œå‘酵生äñ”所用的培养基组份设定; </p> <p class="MsoNormal"> åQ?åQ‰åŸ¹å…ÕdŸºã€å‘é…늽åŠå…¶é™„属讑֤‡çš„ç­èŒï¼› </p> <p class="MsoNormal"> åQ?åQ‰åŸ¹å…Õd‡ºæœ‰æ´»æ€§ã€é€‚é‡çš„纯¿U,接ç§å…¥ç”Ÿäº§çš„容器中; </p> <p class="MsoNormal"> åQ?åQ‰å¾®ç”Ÿç‰©åœ?**适åˆäºŽäñ”物生长的æ¡äšg下,在å‘é…늽中生长; </p> <p class="MsoNormal"> åQ?åQ‰äñ”物èƒå–å’Œ¾_‘Öˆ¶åQ? </p> <p class="MsoNormal"> åQ?åQ‰è¿‡½E‹ä¸­æŽ’出的废弃物的处ç†ã€? </p> <p class="MsoNormal"> 六个部分之间的关¾pÕd¦‚图所½Cºã€‚ç ”½I¶å’Œå‘展计划åQŒæ€ÀL˜¯å›´ç»•瀞®±é€æ­¥æ”¹å–„å‘é…µçš„å…¨é¢æ•ˆç›Šè€Œè¿›è¡Œçš„。在建立å‘é…µ˜q‡ç¨‹ä»¥å‰åQŒé¦–å…ˆè¦åˆ†ç¦»å‡ÞZñ”生èŒåQŒåƈ改良èŒç§åQŒä‹É所产生的äñ”物符åˆå·¥ä¸šè¦æ±‚ã€‚ç„¶åŽæµ‹å®šåŸ¹å…Èš„需求,设计包括æå–˜q‡ç¨‹åœ¨å†…的工厂。以åŽçš„å‘展计划åQŒåŒ…括连¾l­ä¸æ–­çš„æ”¹è‰¯èŒç§ã€åŸ¹å…ÕdŸºå’Œæå–过½E? </p> <h4> <b>3.4.2 å‘酵生äñ”çš„æ¡ä»?/b><b></b> </h4> <p class="MsoNormal"> åQ?åQ‰æŸ¿U适宜的微生物 </p> <p class="MsoNormal"> åQ?åQ‰ä¿è¯æˆ–控制微生物进行代谢的å„ç§æ¡äšgåQˆåŸ¹å…ÕdŸº¾l„æˆåQŒæ¸©åº¦ï¼Œæº¶æ°§pH½{‰ï¼‰ </p> <p class="MsoNormal"> åQ?åQ‰è¿›è¡Œå¾®ç”Ÿç‰©å‘酵的设å¤? </p> <p class="MsoNormal"> åQ?åQ‰æå–èŒä½“或代谢产物åQŒç²¾åˆ¶æˆäº§å“的方法和讑֤‡ </p> <h3> <b>4ã€å‘é…µåŽæœŸé…’¾_‘Ö›žæ”?/b><b></b> </h3> <p class="MsoNormal"> 工业生äñ”中常帔R‡‡ç”¨ä¸‹å›¾æ‰€½Cºçš„‹¹ç¨‹˜q›è¡Œæ“作。连¾l­ç²¾é¦è£…¾|®ä¸»è¦åŒ…括精é¦å¡”åQŒè’¸é¦é‡œåQˆæˆ–¿U°å†æ²¸å™¨åQ‰ç­‰ã€‚ç²¾é¦å¡”帔R‡‡ç”¨æ¿å¼å¡”åQŒä¹Ÿå¯é‡‡ç”¨å¡«æ–™å¡”。加料æ¿ä»¥ä¸Šçš„å¡”ŒDµï¼Œ¿UîCØ“¾_ùN¦ŒDµï¼›åŠ æ–™æ¿ä»¥ä¸‹çš„塔段åQˆåŒ…括加料æ¿åQ‰ï¼Œ¿UîCØ“æé¦ŒDüc€‚连¾l­ç²¾é¦è£…¾|®åœ¨æ“作˜q‡ç¨‹ä¸­è¿ž¾l­åŠ æ–™ï¼Œå¡”é¡¶å¡”åº•˜qžç®‹å‡ºæ–™åQŒæ•…是一½E›_®šæ“作˜q‡ç¨‹ã€? </p> <p class="MsoNormal"> åQ?åQ‰å¡”æ¿çš„作用 </p> <p class="MsoNormal"> å¡”æ¿çš„作用是æä¾›æ°”液分离的场所åQ›æ¯ä¸€å—å¡”æ¿æ˜¯ä¸€ä¸ªæØœåˆåˆ†¼›Õd™¨åQŒåƈ且èƒöå¤Ÿå¤šçš„æ¿æ•°å¯ä½¿å„¾l„分较完全分¼›…R€‚å› æ­¤æ¯ä¸€å—å¡”æ¿æ˜¯ä¸€ä¸ªæØœåˆåˆ†¼›Õd™¨åQŒç»˜q‡è‹¥òq²å—å¡”æ¿ä¸Šçš„ä¼ è´¨åŽï¼ˆå¡”æ¿æ•°èƒö够多åQ‰ï¼Œå›_¯è¾‘Öˆ°å¯ÒŽº¶æ¶²ä¸­å„组分进行较完全分离的目的ã€? </p> <p class="MsoNormal"> åQ?åQ‰å›ž‹¹çš„作用 </p> <p class="MsoNormal"> 回æµçš„主è¦ä½œç”¨å°±æ˜¯æä¾›ä¸òqŒ™¡¡çš„æ±½æ¶²ä¸¤ç›¸ï¼Œè€Œæž„æˆæ±½æ¶²ä¸¤ç›¸æŽ¥è§¦ä¼ è´¨çš„å¿…è¦æ¡äšgã€? </p> <p class="MsoNormal"> 注æ„åQšå·¥ä¸šç”¨¾_ùN¦å¡”内ç”׃ºŽå¡”顶的液相回‹¹å’Œå¡”底的汽相回‹¹ï¼Œä¸ºæ¯å—å¡”æ¿æä¾›äº†æ±½ã€æ¶²æ¥æºã€? </p> </p></div> <a 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