共查询到20条相似文献，搜索用时 46 毫秒
1.
[目的]研究大孔树脂纯化蜂胶总黄酮的最佳工艺。[方法]以比吸附量、解析率及总黄酮回收率为指标,通过考察静态吸附及解吸附试验,筛选最佳大孔吸附树脂。并考察该最佳大孔吸附树脂的动态吸附及解吸附条件,包括原液质量浓度、吸附流量、吸附时间、洗脱剂及洗脱剂流量,从而筛选出该大孔吸附树脂分离纯化蜂胶总黄酮的最佳工艺条件。[结果]FL—1大孔树脂为四种树脂中吸附及解吸附性能最佳,因此选择FL-1为分离纯化蜂胶总黄酮的最佳树脂,其最佳工艺参数为:动态吸附质量浓度0.25～0.38mg/mL,吸附速度1mL/min;树脂柱吸附时间1h,洗脱剂为90%乙醇,洗脱流量为1mL/min。蜂胶总黄酮质量分数从13.07%提高到85.25%,总黄酮回收率达79.37%。[结论]FL-1型大孔树脂对蜂胶总黄酮具有良好的纯化效果,优选工艺合理、稳定、可行。 相似文献
2.
3.
4.
试验旨在利用大孔树脂纯化九节中的粗黄酮,优选纯化总黄酮的最佳工艺。试验比较3种不同大孔吸附树脂AB-8、HP-20、D-101的吸附-解吸附特性,选择最优吸附纯化树脂考察其上样工艺及洗脱工艺,采用Box-Behnken响应面分析法建立数学模型,优选最佳纯化条件。结果显示,HP-20型大孔树脂吸附性强、解吸容易,最佳富集纯化工艺为上样浓度5 g/L、上样pH值4、层析柱高径比7∶1、洗脱液为60%乙醇。使用该工艺对九节总黄酮进行纯化,精制后的总黄酮含量由纯化前17.6%提升至87.8%,约是纯化前的5倍。研究表明,试验获得了HP-20型大孔树脂吸附九节总黄酮的最佳纯化条件,为九节总黄酮作为饲料添加剂的开发利用提供参考。 相似文献
5.
大孔吸附树脂分离纯化锁阳总黄酮效果初探 总被引：1，自引：0，他引：1
摘要：为分离纯化锁阳(Cynomorium songaricum)中总黄酮提取物,选择AB 8型大孔吸附树脂对锁阳总黄酮提取物进行分离纯化。结果显示,分离纯度达97.278%,比吸附量和比洗脱量分别达到81.933和53.164 mg/g。研究表明,AB 8型大孔吸附树脂对锁阳总黄酮吸附性能和解吸性能均好,具有较高的比吸附量、吸附速度和比洗脱量,且纯化能力极强,说明弱极性的树脂适合用于锁阳总黄酮的分离纯化。 相似文献
6.
以贯叶连翘粗提浸膏为材料,考察六种大孔吸附树脂分离纯化金丝桃素的性能。采用静态、动态吸附方法筛选树脂,以中压分离方法确定分离纯化的条件。结果表明:HZ-801树脂以其高吸附率、高洗脱率成为优选的分离填料,其最佳分离纯化条件为:进样液质量浓度为0.1125 g/m L,进样速度为5.0 m L/min、洗脱速度为20 m L/min,0~95%乙醇溶液梯度洗脱,金丝桃素的纯度为79.11%。HZ-801可以较好分离纯化金丝桃素,纯化工艺具有较大实践性及参考价值。 相似文献
7.
8.
为优化赪桐中类叶升麻苷的纯化工艺，并分析其稳定性，试验对8种不同型号的大孔树脂进行吸附-解吸能力比较，筛选出最优的大孔树脂型号；采用Plackett-Burman结合Box-Behnken响应面法，考察上样液浓度、上样液流速、洗脱液浓度等因素水平，优化赪桐中类叶升麻苷的纯化工艺。通过高效液相测定纯化物在不同温度、光照、pH、抗氧化剂等环境条件下类叶升麻苷的含量。结果表明：赪桐中类叶升麻苷最佳纯化工艺条件为ADS-7型号大孔吸附树脂、上样液浓度9.0 mg/mL、上样液流速3.0 m L/min、洗脱液浓度58%，验证试验中的类叶升麻苷回收率可达到76.04%，与所建模型预测接近；稳定性试验表明，温度越高、光照时间越久、pH越高、类叶升麻苷的稳定性越差。同时，添加抗氧化剂可以明显增强其稳定性。故纯化后的类叶升麻苷应在低温、避光、酸性环境中贮藏和使用，且可通过添加不同种抗氧化剂延长其使用期限。采用Plackett-Burman结合Box-Behnken响应面法优化赪桐中类叶升麻苷纯化工艺稳定可行，可为后续抗奶牛乳房炎中草药型饲料添加剂产品的研发及产品稳定性使用提供理论依据。 相似文献
9.
研究不同大孔树脂对蜂王浆中10-羟基-2-癸烯酸的吸附和解吸性能,筛选出一种适合10-羟基-2-癸烯酸（10-HDA）纯化的大孔吸附树脂,并对树脂的吸附、解吸条件进行了优。经测定所获的10-羟基-2-癸烯酸纯度为86％。 相似文献
10.
本试验旨在研究大孔树脂纯化蓝刺头中总黄酮的最佳生产工艺条件。利用紫外-可见分光光度法,建立总黄酮含量的检测方法;采用静态吸附试验对5种类型的大孔树脂进行了筛选;采用动态吸附试验,探讨了蓝刺头上样液浓度、上样速度、树脂径高比等因素对蓝刺头总黄酮吸附率的影响,并通过响应面优化试验确定最佳工艺条件。结果表明：最佳大孔树脂类型为AB-8,湿法加入装柱,径高比为1:8,上样液为总黄酮含量6 mg/mL的蓝刺头溶液,以1 BV/h流速对其进行动态吸附,再用80%乙醇进行洗脱,纯化后总黄酮的含量达65%以上。综上,该工艺条件适于蓝刺头总黄酮的纯化。 相似文献
11.
前言大豆作为人膳食中的蛋白质来源已有5000多年的历史(CentralSoyaCo.,Inc.,1990)。公元前2800年左右,神农氏首先提倡种植大豆,本世纪初传入美国。起初,美国主要关心大豆的含油量,提出油以后的大豆粕和大豆皮仅仅是副产品。不久,大豆粕中蛋白质的优异品质被人们所认识,从此,大 相似文献
12.
13.
一、我国大豆、豆油和豆粕进出口情况 1.大豆贸易状况 大豆一直是我国传统出口创汇产品,长期以来我国一直是大豆出口大国,1950～1960年年均出口量109万t,其中1959年出口173万t,为历史上最高出口年份。1977～1982年我国大豆出口量减少到年均15万t,我国成为大豆净进口国,但是每年进口量不大,只有19～53万t。1983～1995年我国又成为大豆净出口国,其中1985～1994年年均出口约118万t。 相似文献
14.
当前我国大豆、豆油和豆粕市场形势分析 总被引：1，自引：0，他引：1
一、我国大豆生产现状:单产水平偏低,产量增长缓慢 1991-2001年,我国大豆产量增长缓慢,播种面积和单产都很不稳定.播种面积在704～950万hm2之间徘徊,单产在1410～1790kg/hm2之间波动,产量由1994年1600万t下降到2001年1541万t. 相似文献
15.
16.
17.
2005年,国内豆粕价格在全球大豆丰产压力以及猪链球菌、禽流感等疫情打击的影响下,全年低位波动,油厂开工率普遍较低。另外,外资企业加大了对国内油厂的收购力度,大豆压榨行业进一步整合,这些都对国内豆粕市场造成了深远影响。12005年回顾1.1供求状况1.1.1进口2005年,国内大豆进口总量预计达到2659万t,同比增长31.4%,创历史新高(图1)。1-11月国内共进口豆粕12.6万t,同比增长155%,主要进口国仍为印度。图12000-2005年大豆年度进口量对比2005年,我国大豆月度进口量同比均维持在较高水平,尤其是4-8月,单月进口数量超过去年同期50%以上。各月进… 相似文献
18.
回顾篇
1 CBOT大豆行情走势回顾
CBOT大豆市场从2005年9月26日见底以来，指数就一直维持在550～630美分，蒲式耳区间内振荡。2006年年初的第一份美国农业部报告出台后，由于在调高产量的同时调低了出口量的预测，使得大豆价格从637美分，蒲式耳的局部高位向下进入弱势调整，直到4月5日到达阶段性低点570美分／蒲式耳一线。随后，在2006／07年度巴西大豆播种面积减少的消息等因素的情况下，市场开始复苏逐渐走高。 相似文献
19.
An experiment was conducted to measure the effect of adding soybean oil to soybean meal (SBM) and soy protein concentrate (SPC) on apparent (AID) and standardized (SID) ileal digestibility of CP and AA by growing pigs. A second objective was to compare AID and SID of AA in a new high-protein variety of full fat soybeans (FFSB) to values obtained in other soybean products. Commercial sources of FFSB (FFSB-CV), SBM, and SPC, and of a new high-protein variety of FFSB (FFSB-HP) were used in the experiment. Four diets were prepared using each soybean product as the sole source of CP and AA in 1 diet. Two additional diets were formulated by adding soybean oil (7.55 and 7.35%, respectively) to the diets containing SBM and SPC. A nitrogen-free diet was also used to measure basal endogenous losses of CP and AA. The 2 sources of FFSB were extruded at 150 degrees C before being used in the experiment. Seven growing barrows (initial BW = 26.2 kg) were prepared with a T-cannula in the distal ileum and allotted to a 7 x 7 Latin square design. Ileal digesta were collected from the pigs on d 6 and 7 of each period. All digesta samples were lyophilized and analyzed for DM, CP, AA, and chromium, and values for AID and SID of CP and AA were calculated. The addition of oil improved (P < 0.05) the SID of most indispensable AA in SBM and SPC. The SID for 6 of the indispensable AA in FFSB-HP were greater (P < 0.05) than in FFSB-CV, and the SID for all indispensable AA except Met was greater (P < 0.05) in FFSB-HP than in SBM. However, the SID for most AA in FFSB-HP was similar to SBM with oil and SPC, but these values were lower (P < 0.05) than in SPC with oil. In conclusion, the addition of oil improved the SID of most AA in SBM and SPC fed to growing pigs, and the SID of AA in FFSB-HP were greater than in SBM and similar to the SID of AA in SBM with oil and in SPC. 相似文献
20.
Bruce KJ Karr-Lilienthal LK Zinn KE Pope LL Mahan DC Fastinger ND Watts M Utterback PL Parsons CM Castaneda EO Ellis M Fahey GC 《Journal of animal science》2006,84(6):1403-1414
This experiment was designed to evaluate the effects of selected soybean (SB) processing byproducts (gums, oil, soapstock, weeds/trash) when added back to soybean meal (SBM) during processing on the resulting nutrient composition, protein quality, nutrient digestibility by swine, and true metabolizable energy (TMEn) content and standardized AA digestibility by poultry. To measure ileal DM and nutrient digestibility, pigs were surgically fitted with a T-cannula in the distal ileum. The concentration of TMEn and the standardized AA digestibility by poultry were determined using the precision fed cecectomized rooster assay. Treatments in the swine experiment included SBM with no by-products; SBM with 1% gum; SBM with 3% gum; SBM with 0.5% soapstock; SBM with 1.5% soapstock; SBM with 2% weeds/trash; SBM with a combination of 3% gum, 1.5% soapstock, and 2% weeds/trash; SBM with 5.4% soybean oil; and roasted SB. A 10 x 10 Latin square design was utilized. The experiment was conducted at the University of Illinois, Urbana-Champaign, and at The Ohio State University, Columbus. In the swine experiment, apparent ileal DM, OM, CP, and AA digestibilities were reduced (P < 0.05) when pigs consumed the combination by-product diet compared with the diet containing no by-products. Apparent ileal digestibilities of DM, CP, and total essential, total nonessential, and total AA were lower (P < 0.05) for any diet containing by-products compared with the diet with no by-products. Apparent ileal digestibilities of DM, OM, CP, and AA were lower (P < 0.05) for the roasted SB-compared with the SB oil-containing diet. In the rooster experiment, TMEn values were greater (P < 0.05) for roasted SB compared with SBM with no by-products and increased linearly as the addition of soapstock increased. Individual, total essential, total nonessential, and total AA digestibilities were lower (P < 0.05) for roosters fed roasted SB versus SBM devoid of by-products. Gums, soapstock, and weeds/trash reduce the nutritive value of the resultant meal when they are added back during processing. 相似文献