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本科畢業(yè)論文-大青葉多糖提取工藝研究(完整版)

2025-07-21 17:03上一頁面

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【正文】 will cover about 15,000 kilometers and take the caravan more than one year to plete. The caravan is expected to return to Jingyang in March 2021. Then they will e back, carrying specialty products from Kazakhstan A small art troupe founded six decades ago has grown into a household name in the Inner Mongolia autonomous region. In the 1950s, Ulan Muqir Art Troupe was created by nine young musicians, who toured remote villages on horses and performed traditional Mongolian music and dances for nomadic families. The 54yearold was born in Tongliao, in eastern Inner Mongolia and joined the troupe in says there are 74 branch troupes across Inner Mongolia and actors give around 100 shows every year to local nomadic people. I can still recall the days when I toured with the troupe in the early 39。s president, who is also a renowned tenor, tells China Daily. During a tour in 1985, he went to a village and met an elderly local man, who told him a story about his friendship with a solider from Shenyang, capital of Northeast China39。 he wondered how in the world he came to belong there. Indeed his penning and publishing this essay caused his exmunication from high society and also caused him a lot of legal trouble. The legal trouble came as a result of the fact that he was speaking out against the government. I like to reference such texts from time to time as an example both of the fact that history does repeat itself and that this world is not so big that what applies to one society does not in any way touch another society.。s cultural foray overseas, has been widely panned by its home audience. Retitled Empresses in the Palace, the American version has been shortened from its original 76 episodes at 45 minutes each, to six 90minute episodes. The quick pacing threw off many native viewers, who are accustomed to a more leisurely daytimesoapstyle narrative rhythm. (Chinese TV stations would run two or three episodes every day.) I did not finish the fulllength version and found the truncated one not difficult to follow. What39。t help but sing the folk songs, Nasun says. The vastness of Inner Mongolia and the lack of entertainment options for people living there, made their lives lonely. The nomadic people were very excited about our visits, Nasun recalls. We didn39。Mirza M H。Dae R H。但是復(fù)合酶水解條件不易掌握,目前還未工業(yè)化應(yīng)用。將影響因素 料液比和提取次數(shù) 進(jìn)行多重 比較 分析,確定因素水平之間的差異 顯著性 ,結(jié)果如表 4。下降點在 h左右。運用 SPSS 軟件進(jìn)行 正交試驗的數(shù)據(jù)直觀分析和 方差分析 。溫度低,提取不完全,溫度高,導(dǎo)致多糖糊化,分解失活。 大青葉多糖提取工藝研究 4 2 正交試驗優(yōu)選大青葉多糖的提取工藝 材料與 方法 實驗材料 大青葉 吉林農(nóng)業(yè)大學(xué)中藥材學(xué)院藥用 植物專業(yè)楊莉博士惠贈 蒸餾水 東北農(nóng)業(yè)大學(xué)自制 實驗儀器 電子分析天平 中獸醫(yī)實驗室 電磁爐 美的 電器有限公司 恒溫水浴鍋 上海亞榮生化儀器廠 旋轉(zhuǎn)蒸發(fā)器 亞榮生化 離心機(jī) 上??茖W(xué)儀器廠 電熱鼓風(fēng)干燥箱 上海實驗儀器總廠 大青葉多糖 提取 稱取 50 g 大青葉,置于燒杯中放于水浴鍋水浴加溫,或者電磁爐中用自來水進(jìn)行水煮提取,三層紗布過濾, 3000 r低速離心 15 min。 微波提取法 微波是頻率介于 300MHz— 300GHz 之間的電磁波,微波提取的原理是微 射線輻射于溶劑并透過細(xì)胞壁達(dá)到細(xì)胞內(nèi)部,由于溶劑及細(xì)胞液吸收微波能,細(xì)胞內(nèi)部溫度升高,壓力增大,當(dāng)壓力超過細(xì)胞壁的承受能力時,細(xì)胞壁破裂,位于細(xì)胞內(nèi)部的有效成分從細(xì)胞中釋放出來,傳遞轉(zhuǎn)移到溶劑周圍被溶劑溶解。但酸提法有其特殊性,只在一些特定的植物多糖提取中占有優(yōu)勢,目前報道的并不多。因此,植物多糖提取的研究中采用了許多不同的方法,包括溶劑提取、酸提法、堿提法、酶提法、超濾法、微波法等。大青葉中的另一化學(xué)成分色胺酮具有改善由右旋糖苷硫酸鈉誘發(fā)的大腸炎癥的功能。 對免疫系統(tǒng)的作用:大青葉用來治療各種感染性疾病由來已久。說明大青葉類藥材具有廣譜的抑菌作用。 多糖類: 大量研究表明植物多糖是一種良好的免疫調(diào)節(jié)劑,廣泛存在于自然界。 吲哚類生物堿:靛藍(lán)、靛玉紅、大青苷 B(有的也稱大黃素 B 和靛紅烷 B)、異靛藍(lán)?!吨袊幍洹纷?1985版起明確規(guī)定十字花科植物 菘藍(lán) 的葉為大青葉正品 [1]。 提取時間對大青葉多糖得率的影響 .................................... 錯誤 !未定義書簽。 關(guān)鍵詞:大青葉多糖;提??;正交試驗 大青葉多糖提取工藝研究 II Study on Extraction Process of Polysaccharide from Folium Isatidis Abstract Isatis indigotica Fort.(IIF) is a twoyearold cruciferous vegetable. Its root, leave and stem are named Radix Isatis (RI)and Folium Isatis (FI), respectively. They are the mon traditional Chinese medicine with similar efficacy and representative medicines used for relieving heat and toxic. The extraction process of polysaccharides from residues targets for raw polysaccharide, which under conditions that adding 1% plex enzymes into materials and extracting for twice and hours per time at temperature of 80℃ 。 東北農(nóng)業(yè)大學(xué)學(xué)士學(xué)位論文 學(xué)號:A06090014 大青葉多糖提取工藝研究 Study on Extraction Process of Polysaccharide fromFolium Isatidis 學(xué)生姓名: 指導(dǎo)教師: 所在學(xué)院:動物醫(yī)學(xué)學(xué)院 所學(xué)專業(yè):動物藥學(xué) 研究方向 :中獸藥學(xué) 東 北 農(nóng) 業(yè) 大 學(xué) 中國本研究可為工業(yè)化生產(chǎn)和開發(fā)新的中獸藥藥源提供理論依據(jù)。 ........................................ 錯誤 !未定義書簽。 參考文獻(xiàn) .................................................................................................................... 11 致 謝 ....................................................................................................................... 13 大青葉多糖提取工藝研究 1 1 前言 大青葉 研究概況 來源及其藥材性狀 大青葉的來源頗多 ,全國各地有大青葉及其混淆品、代用品達(dá) 6 科 15種之多,這么多的同名異物品當(dāng)作大青葉使用,其形成有著歷史的原因。 大青葉的研究現(xiàn)狀 化學(xué)成分研究 近年來,對大青葉化學(xué)成分的文獻(xiàn)報道主要集中在生物堿、有機(jī)酸、苷類、甾醇等幾大類化合物上。 無機(jī)元素:鋅、鐵、鈣、鎂、錳、銅、鉀、鈉等無機(jī)元素 [8]。孫立新 [13]等則 以枯草桿菌和短小芽胞桿菌作為大青葉的藥理活性檢測指標(biāo)。劉云海等 [17]采用動態(tài)濁度法測定細(xì)菌內(nèi)毒素濃度,觀察大青葉不同化學(xué)部位對放線菌素 D 敏化小鼠內(nèi)毒素致死攻擊的保護(hù)作用,并以內(nèi)毒素制備家兔發(fā)熱模型,測定其肛溫變化,實驗發(fā)現(xiàn)大青葉的正丁醇萃取部位能直接 中和降解內(nèi)毒素,顯著降低內(nèi)素的致熱性和致死性,說明其具有顯著的體內(nèi)、外抗內(nèi)毒素活性。由于大青葉及其代用品具有抗炎作用,人們針對其有效化學(xué)成分靛玉紅進(jìn)行了研究,發(fā)現(xiàn)靛玉紅不僅可以通過 HBL38 抑制干擾素 γ的生成 ,還可以由脾細(xì)胞抑制干擾素 γ和白細(xì)胞介素的產(chǎn)生 [22]。一般植物細(xì)胞壁比較牢固,在提取前需要進(jìn)行專門的破細(xì)胞操作,包括機(jī)械破碎法、溶脹和自脹、化學(xué)處理和生物酶降解。如茜草多糖的提取研究中,發(fā)現(xiàn)相對于水提,以稀酸提取多糖產(chǎn)品純度較高。具有不隨害活性、分離效率高、能耗低、設(shè)備簡單、可連續(xù)生產(chǎn)、無污染等優(yōu)點。水提醇沉工藝對設(shè)備要求簡單,提取溶劑成本低廉,所以從經(jīng)濟(jì)成本、穩(wěn)定性等方面考慮,本實驗采用傳統(tǒng)的水提醇沉工藝進(jìn)行大青葉粗多糖的提取,為今后工業(yè)化生產(chǎn)提供工藝參數(shù),為進(jìn)一步藥理活性研究提供物質(zhì)基礎(chǔ)。 提取溫度對多糖提取效果的影響 溫度是多糖得率的重要影響因素之一。 數(shù)據(jù)處理方法 經(jīng)過不同 單因素考察 后的數(shù)據(jù)用 Excel2021 統(tǒng)計分析軟件進(jìn)行處理、作 折線 圖 ,繪制趨勢圖 。而多糖得率則隨著提取時間的增長而下降。 分析表中數(shù)據(jù)可見
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