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1.
果胶酶和纤维素酶对尤力克柠檬出汁率的影响 总被引：1，自引：0，他引：1
以尤力克柠檬为材料,利用果胶酶和纤维素酶酶解柠檬浆,研究2种酶对尤力克柠檬出汁率的影响,确定柠檬最佳酶解工艺为:果胶酶用量0.2%,纤维素酶0.5%,酶解时间4h,酶解温度45℃,出汁率73.45%。 相似文献
2.
以普宁青梅为原料,以获取率高出汁率为目标,采用正交试验方法研究果胶酶和纤维素酶的用量、酶解时间、酶解温度。结果表明,青梅汁的最佳酶解工艺条件为果胶酶用量2.00 U/kg,纤维素酶用量0.50 U/kg,酶解时间3.0 h,酶解温度30℃,出汁率为76.14%。。 相似文献
3.
以柑橘和红茶为主要原料,探究了柑橘红茶复合饮料的制作工艺。分别以醇试验、碘试验和感官评价结果为指标,通过单因素试验和正交试验对柑橘汁的酶解条件、红茶茶汤的浸提工艺、柑橘红茶复合饮料最佳配方进行优化。结果表明,柑橘汁的最佳酶解工艺为0.2%果胶酶稀释液10%,酶解pH值3.5,酶解温度45℃,酶解时间2.0 h;最佳茶汤浸提工艺为料液比1∶60 (g∶mL),浸提时间10 min,浸提温度80℃;最佳配方为红茶汁用量40 g,柑橘汁用量8 g,白砂糖用量6 g,柠檬酸添加量0.2%,蜂蜜添加量4%。 相似文献
4.
采用单因素试验,分别研究了果胶酶和纤维素酶澄清青梅汁的最佳工艺条件。设计复合酶澄清青梅汁的4因素3水平正交试验,以透光率和出汁率为指标,确定澄清青梅汁的最适工艺条件为:果胶酶用量为0.07%,纤维素酶用量为0.08%,酶解时间为3.5h,酶解温度为40℃,青梅汁的透光率和出汁率分别为79.43%和77.29%。 相似文献
5.
《农产品加工．学刊》2013,(11)
橘瓣囊衣生物酶法脱除技术是出口加工型橘瓣冻干产品加工的关键技术,为提高橘瓣囊衣生物酶法脱除效率,以宫川蜜橘为原料,以果胶酶、纤维素酶、半纤维素酶、木聚糖酶、聚半乳糖醛酸酶等为生物酶制剂试材,以橘瓣囊衣脱除率为评价指标,通过单因素与正交试验,筛选适宜的生物复合酶并测定其囊衣脱除效果。结果表明,最佳生物复合酶配方为:聚半乳糖醛酸酶、果胶酶与半纤维素酶质量比为4∶3∶2,在酶液质量分数为0.2%,pH值为3.5,酶解温度50℃,酶解时间60 min时,宫川蜜橘橘瓣囊衣脱除95%以上,该复合酶囊衣脱除效果良好,使用安全。 相似文献
6.
洋葱愈伤原生质体分离和纯化研究 总被引：1，自引：0，他引：1
建立高效原生质体分离和植株再生体系是进行体细胞杂交的基础性工作。以洋葱多次继代的愈伤组织为研究试材,对原生质体分离纯化技术进行研究。结果表明：2.0%纤维素酶Onozuka R-10+0.1%果胶酶Y-23+0.5%离析酶 R-10+0.60 mol/L甘露醇+CPW+0.1% MES的酶液,酶解6 h,洋葱原生质体分离效果最好。纯化时,适当降低离心力的短时间离心有利于原生质体纯化过程中产量和活力的保持,以600 r/min离心5 min效果为好。 相似文献
7.
以菠萝皮渣为原料,采用酸碱处理法从菠萝皮渣中提取菠萝皮渣纤维,主要对木聚糖酶酶解菠萝皮渣纤维制备低聚木糖的工艺进行研究。采用单因素试验法分析影响酶解效果的主要因素,利用正交试验优化酶解法的最佳工艺条件。结果表明,制备的菠萝皮渣纤维主要成分为粗纤维,约占90.09%,其中纤维素56.71%,半纤维素32.20%,酸不溶性木质素0.48%;木聚糖酶酶解菠萝皮渣粗纤维最优条件为反应温度50℃,pH值6,底物质量浓度60 mg/mL,酶用量1 650 U,反应时间3 h,提取率为12.27%,低聚木糖平均聚合度DP为2.38。 相似文献
8.
超声波协同复合酶法提取南瓜多糖最佳条件的研究 总被引：2，自引：0，他引：2
采用超声波协同复合酶法提取南瓜水溶性多糖,试验将2种独立的提取方法进行协同作用,考察协同作用对提取效果的影响,并与单一超声波法、复合酶解法相比较。首先原料经复合酶酶解处理,酶解条件为:1%纤维素酶,1.5%果胶酶,pH值5.5的磷酸氢二钠—柠檬酸缓冲溶液,40℃水浴振荡30min,酶解中多糖会有部分溶出;在酶解的基础上再进行超声波处理,通过超声破壁作用,进一步增加提取液中水溶性多糖的含量。试验确定超声波协同酶法提取南瓜多糖的最佳超声波工艺为:超声时间为10min,超声功率300W,料液比1∶30,多糖提取率为25.94%。通过对3种提取方法的比较,超声波协同酶法得到的南瓜多糖提取率最高,其次是复合酶法。 相似文献
9.
《农产品加工．学刊》2017,(12)
以干菠萝皮渣为原料,运用纤维素酶解法提取菠萝皮渣中的可溶性膳食纤维,通过单因素试验和正交试验,确定最优的提取工艺为纤维素酶添加量0.9%,料液比1∶35(g∶m L),酶解液pH值6.0,酶解时间75 min。在此工艺条件下,菠萝皮渣中可溶性膳食纤维的提取率可达10.03%,样品的持水力、持油力和溶胀性分别为8.698 g/g,5.07 g/g,12.02 m L/g,同时对胆固醇也具有一定的吸附能力。 相似文献
10.
为获得大量、有活力的原生质体,建立起高效的小青杨（Populus pseudo-simonii Kitag.）原生体分离体系,本研究以小青杨无菌苗叶片为材料进行原生质体分离条件的研究。结果表明：酶的种类和浓度、渗透压稳定剂浓度、酶解时间、叶龄是影响原生质体分离的重要因素;将叶龄35天的无菌苗第2~3片叶片置于酶液组成为CPW+3.0% 纤维素酶R-10+0.5% 离析酶 R-10+0.1% 果胶酶Y-23+0.6 mol/L甘露醇+0.6 g/L MES+1 g/L BSA中酶解8 h,原生质体产量和活力分别为2.44×107个/g和78.7%。通过该分离体系稳定的获得了高产量、高活力的原生质体,可以满足进一步的原生质体培养等技术的要求。 相似文献
11.
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
12.
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
13.
Summary Apple and pear pollen was irradiated with doses of 0, 50, 100, 250 and 500 krad (gamma rays) and stored at 4°C and 0–10% r.h. From the in-vitro germination percentages an average LD 50 dose of about 220 krad was estimated. For both irradiated and untreated pollen a close and corresponding lineair relationship existed between germination percentage and pollen tube growth.Irradiated pollen was much more sensitive to dry storage conditions than untreated pollen, resulting in less germination and more bursting. Apparently, irradiation caused the pollen cell membrane to lose its flexibility faster than normal. Rehydration of dry-stored, irradiated pollen in water-saturated air restored germination percentages up to their initial levels. The importance of this procedure in germination trials is stressed. 相似文献
14.
Richard N. Lester 《Euphytica》1989,44(1-2):125-132
Summary An hypothesis is developed that the rapid change from wild plants into domesticated crops principally involves the selection of alleles with non-functional gene products which leads to reduced control of the highly integrated metabolism and morphogenesis previously accumulated by lengthy natural selection. Such disturbance of the genome produces altered physiological and morphological development which, although deleterious in nature, serves mankind better and has been selected. 相似文献
15.
B. Julier P. Guy C. Castillo-Acuna G. Caubel C. Ecalle M. Esquibet V. Furstoss C. Huyghe C. Lavaud A. Porcheron P. Pracros G. Raynal 《Euphytica》1996,91(2):241-250
Summary Twenty-five lucerne populations of the Medicago sativa complex, which were either diploid or tetraploid and wild or cultivated, were analysed for their resistance to four different fungal diseases and to stem nematode. Forage quality, including stem digestibility and saponin content, was also tested.Populations varied in susceptibility to the diseases caused by Colletotrichum trifolii, Verticillium albo-atrum, Sclerotinia trifoliorum and Pseudopezizza medicaginis, and to the nematode Ditylenchus dipsaci. Except for Sclerotinia rot, sativa and falcata subspecies differed in susceptibility, but this grouping of populations did not account for the full range of variation among them. However, the resistance to P. medicaginis was much lower in the sativa than in the falcata populations.Populations also varied significantly in stem fiber content and digestibility. Stem digestibility was negatively correlated to forage yield. Wild sativa and falcata populations had lower fiber content and higher digestibility than cultivated sativa populations. The medicagenic acid was the sapogenin responsible for the anti-nutritional effect of the lucerne measured by the yellow mealworm larvae Tenebrio molitor. The medicagenic acid content was lowest for the pure sativa populations, highest for the pure falcata populations, and intermediate for the French sativa varieties that have some traits originating from falcata germplasm. Some populations could be used in breeding programs to improve disease and nematode resistance, and forage quality. 相似文献
16.
In order to explore the pharmacological effects of active components of Gastrodiae Rhizoma on the central nervous system,through consulting related literatures,... 相似文献
17.
[Objectives]The purpose of this study was to investigate the effects of Pb on rhizosphere soil enzyme activity and chemical constituents of Achyranthes bidentat... 相似文献
18.
不同P-Zn配比对小麦幼苗微量元素营养的影响 总被引：2，自引：0，他引：2
采用了螯合-缓冲营养液培养方法对小麦进行了苗期培养试验,在3个P水平(0,0.6,3.0 mmol/L)和3个Zn水平(0,3,30 μmol/L)的完全组合下对小麦苗期生长及Zn、Fe、Cu、Mn营养进行了研究,旨在为小麦微肥施用提供理论依据.结果表明,P、Zn的正常供应促进了小麦生长,二者的缺乏与过量均会抑制小麦发育,且这种影响在冠部表现得更为明显.在小麦苗期,Zn与Cu的吸收存在明显的拮抗作用,但供Zn则促进了Zn和Cu的转运,而Mn转运则受到了抑制;过量供Zn时,大量Zn被转运到冠部,同时明显抑制了(Fe+Cu+Mn)的吸收总量;P的供应显著地抑制了Fe的吸收,但P的供应提高了Zn、Cu、Mn的转运率;P、Zn在对Zn与Fe、Cu、Mn间吸收竞争的影响中,Zn本身的影响要比P的影响更为明显,供Zn明显促进了小麦幼苗对Zn的吸收;在小麦幼苗冠部,Zn与Fe的竞争中,供P利于Zn的吸收,缺P则利于Fe的吸收;而Zn与Cu以及Zn与Mn间的竞争中,缺磷时利于Zn的吸收,供磷后则利于Cu和Mn的吸收.总之,小麦幼苗Zn、Fe、Cu、Mn营养中,P、Zn的不同配比会不同程度地改变Zn与Fe、Cu、Mn的协同或拮抗效应. 相似文献
19.
Summary
Glycine tabacina (Labill.) Benth. is a wild perennial species related to the cultivated soybean, G. max (L.) Merr. It is composed of diploid (2n=40) and tetraploid (2n=80) cytotypes. Currently, to differentiate the cytotypes, plants are grown out in the greenhouse and chromosome counts made on pollen mother cells. It is a laborious and time consuming process. The objective of this study was to determine whether electrophoretic techniques could be utilized to separate the cytotypes. Electrophoretic examination of seven isozyme systems from seed of 67 G. tabacina accessions revealed banding patterns that could be used to differentiate between diploid and tetraploid cytotypes in the species. Among the tetraploid accessions, the number of bands observed were always greater than the diploids. Some tetraploid banding patterns consisted of bands similar to the diploid tabacina and/or additional bands previously identified in other Glycine species. The patterns of isozyme multiplicity and variation in the tetraploid tabacinas suggests more than one mode of origin for the tetraploids. 相似文献
20.
Summary Some photosynthetic characters as-leaf anatomy, leaf photosynthetic rate and CO2 compensation pointdistinguishing C3 and C4 plants and physiological characters as leaf area ratio, nitrogen content, leaf stem ratio and total shoot-to-root and deep root-to-shoot ratios have been studied in rice × sorghum and rice × wheat hybrids. Rice × sorghum 1. has lower values of photosynthetic rate, leaf nitrogen, total root and deep root-to-shoot ratio and CO2 compensation point as of rice parent where as, rice × sorghym 2. is superior in all these characters. Both hybrids lack kranz anatomy. Though both rice × sorghum hybrids show characters of C3 rice plant but rice × sorghum 2. has improved drought tolerance and leaf characters in relation to yield. Rice × wheat hybrid have higher assimilatory area and higher total root-to-shoot ratio. Grains of rice × wheat hybrids are identical to rice grain. However, as grains of rice × wheat hybrid does not contain seed coat, it could be exploited as novel rice germplasm after improvement.Abbreviations T
CO2 compensation point
- T21
CO2 compensation point at 21% O2
- T2
CO2 compensation point at 2% O2
- dR/sR
deep Root-to-shoot Ratio
- LAR
Leaf Area Ratio
- CER
photosynthetic rate
- TR/SR
Total Root-to-Shoot Ratio 相似文献