共查询到20条相似文献，搜索用时 62 毫秒
1.
《农产品加工．学刊》2017,(20)
以巴旦木粕蛋白质提取率作为衡量指标,利用碱溶酸沉法提取巴旦木粕蛋白质。用单因素试验考查料液比、加热温度、加热时间及p H值对巴旦木粕蛋白质提取率的影响,利用数学模型,确定最佳工艺。结果表明,巴旦木蛋白的等电点为4.0;其最佳工艺条件为p H值9.0,料液比1∶22(g∶m L),加热温度48.2℃,加热时间59.2 min。在此工艺条件下,巴旦木蛋白提取率可达58.67%。 相似文献
2.
采用响应面法优化富硒红茶的提取工艺,以可溶性固形物和茶多酚的提取率为指标,对提取时间、料液比和浸提温度等因素进行考查,并将提取的富硒红茶汤与桃汁进行复配,得到了桃汁富硒红茶复合饮料。结果表明,在浸提时间22 min,料液比1∶100(g∶m L),浸提温度89℃的条件下,茶汤中茶多酚的提取率为4.32%。测定茶汤的相关理化指标:p H值5.61,可溶物浸出率为38.6%,可溶性糖约占提取物0.74%,硒含量0.23μg/L,其中的营养成分含量丰富。选取桃汁进行调配,保留富硒红茶原本的茶香,茶香较浓,口感干润、醇厚。 相似文献
3.
响应面法优化籽瓜皮果胶提取工艺 总被引：3，自引：0，他引：3
以籽瓜皮为原料,采用响应面法,应用Box-Behnken方法建立数学模型,对其果胶超声波辅助酸法提取工艺进行优化。结果表明,影响籽瓜皮果胶得率各因素的主次顺序为:浸提温度超声功率p H超声时间;采用超声波辅助酸提法提取籽瓜皮果胶的最佳工艺参数为:液料比50∶1(m L/g),p H 1.9,超声功率140 W,浸提温度67℃,超声时间54 min。在此条件下籽瓜皮果胶得率的理论值为13.85%,验证试验的果胶得率为13.58%,二者接近,表明该数学模型优化的籽瓜皮果胶提取工艺是可行的;采用超声波辅助酸法提取籽瓜皮果胶,可比传统的酸提取法节省时间40%以上。 相似文献
4.
以花生粕为原材料,研究氯化钠浓度、pH值、料液比、浸提时间和浸提温度对花生水溶性蛋白的提取率影响,在单因素试验的基础上采用响应面法,研究盐辅助法提取花生粕蛋白的最优提取工艺参数。结果表明,在料液比为1∶19,Na Cl浓度为0.17 mol/L,浸提温度为58℃,浸提时间为42 min,pH值为9.86时,花生粕蛋白提取率最高,为39.33%。 相似文献
5.
《农产品加工．学刊》2020,(16)
研究探讨了从亚麻籽壳中提胶的关键因素料液比、浸提温度、浸提液pH值、浸提时间对亚麻籽胶提取率的影响。结果表明,料液比对亚麻壳提胶的提取率影响最大,其次为浸提温度和浸提液pH值,浸提时间对提胶提取率的影响最小。从亚麻籽壳中提胶的最佳工艺组合条件为料液比1∶16 (g∶m L),浸提温度75℃,浸提液pH值6.5,浸提时间90 min。在此条件下亚麻籽胶的提取率为26.7%±0.2%,所得胶的黏度为6 188±18.2 m Pa·S。用亚麻籽壳提取胶质具有高效低耗的特点,是亚麻籽综合开发利用可以选择的方向之一。 相似文献
6.
《农产品加工．学刊》2017,(24)
以紫马铃薯为主要原料,采用乙醇浸提法提取紫马铃薯花青素,并采用单因素方法优化其工艺参数。结果表明,紫马铃薯提取最佳工艺参数为乙醇体积分数60%,料液比1∶30(g∶m L),提取温度60℃,提取时间2 h,盐酸调节p H值为1,在此条件下紫马铃薯花青素提取量为1.27 mg/g。 相似文献
7.
《农产品加工．学刊》2016,(10)
利用超声波技术提取天然玫瑰茄色素,以浸提液吸光度为评价指标,经过单因素试验和正交试验确定了最优提取工艺参数为提取时间40 min,提取功率70 W,提取温度50℃,浸提液料液比1∶20(g∶m L)。 相似文献
8.
以凉茶残渣淡竹叶和金钱草为原料,在单因素试验的基础上,通过正交试验优化淡竹叶和金钱草中水不溶性膳食纤维(IDF)的提取工艺条件,并对提取的IDF进行相关指标测定。结果表明,淡竹叶中水不溶性膳食纤维的最佳提取工艺条件为:料液比1∶10(g/m L),碱液浓度5 mg/m L,水解时间2.0 h,浸提温度70℃。在该工艺条件下,淡竹叶IDF的提取率为63.75%±0.94%,持水力为(4.00±0.22)g/g,膨胀力为(7.87±0.33)m L/g,高于标准麸皮的相关功能性指标。金钱草中水不溶性膳食纤维的最佳提取工艺条件为:料液比1∶20(g/m L),碱液浓度5 mg/m L,水解时间1.5 h,浸提温度50℃。在该工艺条件下,金钱草膳食纤维的提取率为60.16%±0.39%,持水力(3.67±0.17)g/g,膨胀力为(8.67±0.37)m L/g。虽然金钱草水不溶性膳食纤维的持水力略低于标准麸皮,但溶胀性高于标准麸皮。总体而言,碱法提取水不溶性膳食纤维的工艺稳定性高,可节约能源,适于工业应用,为进一步开发高附加值产品奠定了一定的基础。 相似文献
9.
《农产品加工．学刊》2016,(13)
采用超声波辅助盐析法提取橘子皮中果胶。以果胶提取率为指标,确定了三氯化铁为果胶提取最佳盐,然后通过单因素试验和正交试验对超声波辅助盐析法提取橘子皮中果胶进行工艺研究。结果表明,在超声功率600 W,超声时间50 min,盐溶液液料比1∶0.15(m L∶g),盐析p H值6,盐析温度60℃的条件下橘子皮果胶提取率达到18.54%。 相似文献
10.
《农产品加工．学刊》2021,(19)
以玫瑰花蕾为主要原料,研制一种天然饮料使用、富含色素的浸提液,以提高玫瑰花的开发价值;通过单因素试验及正交试验确定玫瑰色素的最佳浸提工艺,最佳条件为柠檬酸质量分数14%,料液比1∶40 (g∶m L),浸提时间60 min,浸提温度80℃时获得一种深红色的玫瑰花蕾浸提液。 相似文献
11.
Biological Activity and Quantification of Suspected Allelochemicals from Alfalfa Plant Parts 总被引：7，自引：0，他引：7
Autotoxicity restricts reseeding of alfalfa (Medicago sativa L.) after alfalfa until autotoxic chemical(s) breaks down or is dispersed into external environments. A series of aqueous extracts from leaves, stems, roots and seeds of alfalfa ‘Vernal’ were bioassayed against alfalfa seedlings of the same cultivar to determine their autotoxicity. The highest inhibition was found in the extracts from the leaves. Extracts at 40 g dry tissue l?1 from alfalfa leaves were 15.4, 17.5 and 28.7 times more toxic to alfalfa root growth than were those from roots, stems and seeds, respectively. A high‐performance liquid chromatography (HPLC) analysis with nine standard compounds showed that the concentrations and compositions of allelopathic compounds depended on the plant parts. In leaf extracts that showed the most inhibitory effect on root growth, the highest amounts of allelochemicals were detected. Among nine phenolic compounds assayed for their phytotoxicity on root growth of alfalfa, coumarin, trans‐cinnamic acid and o‐coumaric acid at 10?3 m were most inhibitory. The type and amount of causative allelochemicals found in alfalfa plant parts were highly correlated with the results of the bioassay, indicating that the autotoxic effects of alfalfa plant parts significantly differed. 相似文献
12.
C. J. Spurr D. A. Fulton P. H. Brown R. J. Clark 《Journal of Agronomy and Crop Science》2002,188(4):275-280
Development of onion (Allium cepa L., cv. ‘Early Cream Gold’) seed under cool climate conditions in Tasmania, Australia occurred over a longer duration than previously reported, but similar patterns of change in yield components were recorded. In contrast to previous studies, umbel moisture content declined from 85 to 67 % over 57 days while seed moisture content decreased from 85 to 31 %. Seed yield continued to increase over the duration of crop development, with increasing seed weight compensating for seed loss resulting from capsule dehiscence in the later stages of maturation. Germination percentage was high and did not vary significantly from 53 to 77 days after full bloom (DAF), but mean germination time declined and uniformity of germination increased significantly over the same time period. The percentage abnormal seedlings declined with later harvest date, resulting in highest seed quality at 77 DAF. The results of this study suggest that the decision to harvest cool climate onion seed crops before capsule dehiscence will result in a loss of potential seed yield and quality. 相似文献
13.
Jens Jensen 《Euphytica》1979,28(1):47-56
Summary The high-lysine gene in Risø mutant 1508 conditions an increased lysine content in the endosperm via a changed protein composition, a decreased seed size, and several other characters of the seed. The designation lys3a, lys3b, and lys3c, is proposed for the allelic high-lysine genes in three Risø mutants, nos 1508, 18, and 19. Linkage studies with translocations locate the lys3 locus in the centromere region of chromosome 7. A linkage study involving the loci lys3 and ddt (resistance to DDT) together with the marker loci fs (fragile stem), s (short rachilla hairs), and r (smooth awn) show that the order of the five loci on chromosome 7 from the long to the short chromosome arm is r, s, fs, lys3, ddt. The distance from locus r to locus ddt is about 100 centimorgans. 相似文献
14.
G. H. Kroon 《Euphytica》1994,76(1-2):125-125
Summary
K x vadensis is a hybrid of K. blossfeldiana and K. marmorata obtained after doubling the number of chromosomes. 相似文献
15.
Hongyan WEI Jian ZHOU Jinguang LU Jingzheng SONG Qiongxi YU Zhihong JIANG 《Medicinal Plant》2019,(6):27-29
[Objectives]This study aimed to establish a QAMS(quantitative analysis of multi-components by single-marker)method for simultaneous determination of four phenol... 相似文献
16.
Summary Avoidance of rust fungi that was based on poor appressorium induction was previously found in Hordeum chilense. In the present study 95 accessions of Triticeae were screened for avoidance of Puccinia hordei. The percentage of appressorium formation per germinated spore ranged from 6 to 90%. On none of the 41 accessions of Aegilops, Agropyron, Elymus, Secale, Thinopyrum or Triticum studied was the rate of appressorium formation lower than 25%. Lower rates of appressorium formation were, however, found on accessions of wild barley species Hordeum brachyantherum, H. marinum, H. parodii and H. secalinum. Its implications in cereal breeding are discussed. 相似文献
17.
Summary Reactions of 13 grasses to Meloidogyne naasi varied with species; ryegrasses, fescues and their hybrids were generally susceptible and cocksfoot and timothy resistant. Marked variation in host resistance levels occurred between genotypes within cultivars.Selection of single plants, followed by tests on replicate tillers, identified resistant and susceptible genotypes in both Italian and perennial ryegrass cultivars. Resistant plants had few nematode-induced galls and fewer females and eggs than susceptibles. There was more or less continuous variation, with many genotypes intermediate between extremes of resistance and susceptibility. Selected resistant and susceptible genotypes are of use in assessing variation in nematode populations and as controls for breeding and selection programmes. 相似文献
18.
W. Erskine M. Tufail A. Russell M. C. Tyagi M. M. Rahman M. C. Saxena 《Euphytica》1993,73(1-2):127-135
Lentil production is limited by lack of moisture and unfavorable temperatures throughout its distribution. Waterlogging and salinity are only locally important. Progress has been made in breeding for tolerance to drought through selection for an appropriate phenology and increased water use efficiency and in breeding for winter hardiness through selection for cold tolerance.The diseases rust, vascular wilt, and Ascochyta blight, caused by Uromyces viciae-fabae, Fusarium oxysporum f. sp. lentis, and Ascochyta fabae f. sp. lentis, respectively, are the key fungal pathogens of lentil. Cultivars with resistance to rust and Ascochyta blight have been released in several countries and resistant sources to vascular wilt are being exploited. Sources of resistance to several other fungal and viral diseases of regional importance are known. In contrast, although the pea leaf weevil (Sitona spp.) and the parasitic weed broomrape (Orobanche spp.), and to a lesser extent the cyst nematode (Heterodera ciceri), are significant yield reducers of lentil, no sources of resistance to these biotic stresses have been found. Directions for future research in lentil on both biotic and abiotic stresses are discussed. 相似文献
19.
D. A. Bond G. J. Jellis G. G. Rowland J. Le Guen L. D. Robertson S. A. Khalil L. Li-Juan 《Euphytica》1993,73(1-2):151-166
Progress is being made, mainly by ICARDA but also elsewhere, in breeding for resistance to Botrytis, AScochyta, Uromyces, and Orobanche; and some lines have resistance to more than one pathogen. The strategy is to extend multiple resistance but also to seek new and durable forms of resistance. Internationally coordinated programs are needed to maintain the momentum of this work.Tolerance of abiotic stresses leads to types suited to dry or cold environments rather than broad adaptability, but in this cross-pollinated species, the more hybrid vigor expressed by a cultivar, the more it is likely to tolerate various stresses. 相似文献
20.
Chunli TANG Fengxian ZHAO Hongxia CHEN Jiabao MA Jiangcun WEI Meiyan QIU Zhen XIE 《Medicinal Plant》2019,(6):60-65
[Objectives]To optimize the water extraction process of Chinese Herbal Compound Man Gan Ning and establish a method for its extraction and content determination... 相似文献