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碧冬茄的挥发性化学成份鉴定及其驱蚊活性研究初报 总被引:1,自引:0,他引:1
碧冬茄的挥发性化学成份鉴定及其驱蚊活性研究初报么恩云,李正名,平霄飞,施红林,毕富春,王文丽(元素有机化学国家重点实验室,南开大学元素有机化学研究所天津300071)杨瑞华(南开大学生物系天津300071)在天然植物中蕴藏着极其丰富的生理活性物质。近... 相似文献
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以内蒙古地区沙棘果实为原料,研究了提取黄色素的工艺条件,同时对该色素的性质进行了初步探讨。结果表明,以95%的乙醇溶液作浸提剂,提取的黄色素浓度最高,工艺流程简单易行,且无毒,无污染。对提取的黄色素进行的性质试验表明,沙棘黄色素对光、热具有较好的稳定性,适用于酸性或弱碱性的食品中,葡萄糖、氧化剂(H2O2)、还原剂(Na2SO3)等食品添加剂均无明显影响以上结果为这种优良天然色素的开发与应用提供了参考。 相似文献
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比较研究了人参不同部位提取物体外的抗氧化活性及化学成分差异,为合理开发利用人参资源提供理论依据。 分别采用1,1-二苯基-2-三硝基苯肼自由基清除法(DPPH)、2,2'-联氮-双-3-乙基苯并噻唑啉-6-磺自由基清除法(ABTS)和铁离子还原法(FRAP)评价人参不同部位提取物的抗氧化活性,利用气相色谱-质谱联用技术(GC-MS)对人参不同部位乙酸乙酯提取物(EAE)中的化合物进行鉴别与比较。 DPPH、ABTS及FRAP实验结果表明人参茎叶EAE提取物的抗氧化效果最好。 其中DPPH试验EAE的半数抑制浓度(IC50)值为(0.66±0.02) g/L,阳性药-2,6-二叔丁基对甲基苯酚(BHT)的IC50值为(0.26±0.02) g/L;ABTS试验EAE IC50值为(0.54±0.26) g/L,阳性药BHT的 IC50值为(0.15±0.04) g/L;FRAP试验EAE结果为(272.09±3.78) mg/L,阳性药BHT的值为(1319.37±3.80) mg/L。 经GC-MS分析,分别从人参根、人参茎叶、人参花和人参种子EAE提取物中鉴别出20、27、14和14种成分,其中共有成分1种,为亚油酸。 本研究为更好地合理开发与利用人参资源及精深加工抗氧化食品、化妆品产品提供了理论依据。 相似文献
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建立了超高效液相色谱-串联质谱(UHPLC-MS/MS)测定化妆品中67种植物提取物标识成分的方法.化妆品样品经甲醇(含1%甲酸)超声提取,样液在0.1%甲酸溶液-乙腈流动相体系下经Agilent RRHD Eclipse Plus Zorbax C18(3.0 mm×100 mm,1.8 µm)色谱柱梯度洗脱分离.采用电喷雾正、负离子模式分别对67种成分进行定性定量分析,其中正离子采用多反应监测(MRM)方式,负离子采用动态多反应监测(DMRM)方式,以基质匹配外标法定量.以膏霜、乳液基质为代表,67种成分在各自质量浓度范围内线性关系良好,相关系数(r2)均大于0.99;检出限为0.0026~1.7 µg/g,定量下限为0.0080~5.0 µg/g;3个不同加标水平下,膏霜、乳液基质的平均回收率分别为85.6%~117%和82.7%~116%,相对标准偏差(RSD,n=6)分别为1.0%~12%和0.90%~12%.该法简单快速,灵敏度高,适用于化妆品中67种植物提取物标识成分的定性鉴定和含量测定. 相似文献
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超高效液相色谱法同时鉴定育发化妆品中17种植物提取物标识成分 总被引:1,自引:0,他引:1
建立了同时鉴定育发化妆品中芍药苷、羟基红花黄色素A、毛蕊异黄酮葡萄糖苷、阿魏酸等17种植物提取物标识成分的超高效液相分析方法。不同基质的样品经80%甲醇溶液涡旋振荡、超声提取及Na Cl法破乳后,提取液经高速离心处理。选用Waters ACUITY UPLC CSH C18反相色谱柱(50 mm×2.1 mm,1.7μm),以甲醇/0.05%H3PO4为流动相,梯度洗脱,然后采用二极阵列管检测器(PDA)进行测定。考察了方法的灵敏度、线性范围、回收率、日内和日间精密度。在本方法条件下,17种标识功效成分在0.2~25 mg/L的浓度范围内呈良好线性关系,相关系数均大于0.999;方法检出限为0.3~1.5 mg/kg,方法定量限为1.0~4.0 mg/kg。样品的回收率为93.5%~105.0%,日内精密度(n=6)为0.4%~4.5%,日间精密度(n=6)为0.8%~4.6%。本方法简单、快速、准确,已成功用于实际样品中17种标识功效成分的鉴定检测。 相似文献
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氢化物发生-原子荧光光谱法测定植物提取物中砷 总被引:4,自引:0,他引:4
建立了测定植物提取物中微量砷的原子荧光光谱方法,方法灵敏度高,准确度好。在选定的实验条件下,荧光强度与砷浓度在0~17ng/mL范围内成线性关系,相关系数0.9993,检出限0.4ng/mL,回收率92.3%~98.1%,相对标准偏差不超过4.2%。 相似文献
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植物内生真菌抗肿瘤活性成分研究进展 总被引:6,自引:0,他引:6
从植物内生真菌中获得了一系列具有多样性结构的抗肿瘤活性化合物. 对植物内生真菌所产生的萜类、生物碱、黄酮、甾体、酯类化合物的结构和对肿瘤细胞的抑制作用、抑制效果, 以及这些内生真菌的寄主植物等几方面进行了综述, 并且简要讨论了这些内生真菌与其寄主植物之间的化学生态学关系. 相似文献
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核桃楸树皮乙醇提取物的成分分析 总被引:4,自引:0,他引:4
采用常规提取法浸提核桃楸树皮的活性成分,采用GC-MS联用技术对核桃楸树皮乙醇提取物中氯仿萃取物和乙酸乙酯萃取物的化学组成和各成分进行分析. 结果表明,核桃楸树皮乙醇提取物中氯仿萃取物的主要活性成分分别为:5-羟基-1,4-萘醌(胡桃醌,质量分数36.65%),4-羟基-2-甲氧基肉桂醛,2,3-二氢苯并呋喃,香草醛,2-甲氧基-4-乙烯基苯酚. 核桃楸树皮乙醇提取物中乙酸乙酯萃取物的主要活性成分分别为:1,2,3-苯三醇(质量分数42.31%),5-羟基-1,4-萘醌(胡桃醌,质量分数12.33%),7-甲氧基-1-四氢萘酮(质量分数11.26%),5-羟甲基-2-呋喃醛,3,4-二氢-6,7-二羟基-1(2H)-萘酮,4-羟基-2-甲氧基肉桂醛,D-阿洛糖. 相似文献
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一种高效驱蚊剂的合成高明章(西江大学轻工化学系肇庆526061)关键词驱蚊剂DETA合成中图分类号O625.5为了驱避蚊虫,人们进行了多年的研究,合成了许多驱蚊剂,到1975年止,各国合成和试验过的化合物就有2500种以上[1]。其中N,N-二乙基间... 相似文献
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Callicarpenal, isolated from the leaves of American beautyberry (Callicarpa americana) and Japanese beautyberry (Callicarpa japonica), exhibits significant mosquito bite-deterring activity and repellent activity against ticks and fire ants. The mosquito bite-deterring activity level of callicarpenal was reported to be similar to that of N,N-diethyl-m-toluamide. The novel synthesis of (?)-callicarpenal reported herein was accomplished by starting from (+)-pulegone. In our original approach, a novel Prins-type cyclization based on Meyer–Schuster rearrangement was featured as a key step. 相似文献
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《Arabian Journal of Chemistry》2022,15(12):104339
Mosquito-borne diseases are a great concern for human health, and an increment in urbanization causes a rise in the population of mosquitoes. The efficient methods and products for countering mosquito bites are the urgent need of the hour. To protect against mosquitoes, mosquito repellent textiles are an attractive substrate. An impartment of simultaneous dyeing and finishing effects on nylon is an urgent requirement as it can enhance its applicability in various technical applications. The present study reports the preparation of a mosquito repellent-cum-UV protective nylon using a novel reactive dye. The synthesis of dye involves the reaction of cyanuric chloride with H-acid (sodium 4-amino-5-hydroxy-2,7-naphthalene disulfonic acid) to generate cyanuric-H-acid, which was further reacted with diazotised 4-amino-N, N-diethyl-3-methylbenzamide (DEET-NH2) to synthesise a novel cold brand reactive dye. Fourier-transform infrared spectroscopy (FTIR), proton nuclear magnetic resonance (1H NMR), elemental analysis (CHN analyser), UV–vis spectroscopy, and thermogravimetric analysis (TGA) were used to characterise the synthesised dye. The colouration of nylon was done in an infrared lab dyeing machine. The exhaustion and fixation of dye on nylon and the colouration properties (L*, a*, b*, C*, K/S) of dyed nylon were explored. Functional properties (mosquito repellency and UV protection) were evaluated even after laundering treatments. The dyed fabrics were also characterised using TGA and scanning electron microscope (SEM) analysis. An outstanding mosquito repellency (100 %) and good UV protection were achieved. 相似文献
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Callicarpenal (1), a natural terpenoid isolated from American beautyberry (Callicarpa americana), has shown significant repellent activities against mosquitoes, ticks, and imported fire ants. Here we report our efficient synthetic approach to this natural product, and preliminary results of the mosquito biting-deterrent effects of callicarpenal as well as its synthetic precursors and related C8-epimers. The synthetic strategy allows rapid access to various epimers and analogues of the natural product that can be used to explore its structure-activity relationship and optimize its biological properties. 相似文献
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Howell G.M. Edwards Dennis W. Farwell Jose-Maria Alia Mauro V. de Ameida 《Analytica chimica acta》2005,532(2):177-186
The Raman spectrum of guarana, an important product of the Amazonian rain forest, has been investigated; the therapeutic properties of guarana and it's extracts have been realised for some time and have been attributed to guaranine, which could be a complex of caffeine and tannins or to a new xanthine natural product. The purpose of this study is two-fold: firstly, to provide molecular structural information about guarana seeds and their extracts and, secondly, to test the viability of using the technique as a method of verification of genuine guarana extracts from synthetic composites. Raman spectroscopy shows that the composition of the guarana is very similar for the whole seed and for the outer and inner portions of the dissected seed, which are closely similar also to the ground commercial powders produced in the Amazon for the distributors. The results indicate that Fourier-transform Raman spectroscopy could be used for the monitoring of quality control of guarana products in the phytopharmaceutical industry. 相似文献
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E. E. Shul'ts T. N. Petrova M. M. Shakirov E. I. Chernyak G. A. Tolstikov 《Chemistry of Natural Compounds》2000,36(4):362-368
The composition of phenolic components of roots and rhizomes ofGlycyrrhiza uralensisFisch. from Siberia is studied. A total of 15 components belonging to 8 structural types including 4' -methylglucoliquiritigenin, which was previously unknown in licorices, is found. The components in samples collected from various regions of Siberia are practically identical. 相似文献
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用非水毛细管电泳电化学检测法分离检测了日夜百服宁中的有效成分,研究了电极电位、不同浓度的甲酰胺(FA)、电解液浓度和酸度、电泳电压及进样时间对电泳分离的影响,得到了较为优化的测定条件.实验结果表明,在25mmol/LTris-25mmol/LH3BO3(表观pH=8.5)运行介质中,日夜百服宁中的4种有效成分即扑热息痛(AP)、盐酸伪麻黄碱(PH)、氢溴酸右美沙芬(DM)和扑尔敏(CM)在12min内完全分离.检测电位为+0.9V(vs.SCE).线性范围分别为AP 0.5~200mg/L;PH 0.8~300mg/L;DM 2.5~350mg/L;CM 0.5~330mg/L;检测限分别为AP 0.1mg/L;PH0.55mg/L;DM 1mg/L;CM 0.2mg/L. 相似文献
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Artur Macari Rodica Sturza Ildiko Lung Maria-Loredana Soran Ocsana Opri Greta Balan Aliona Ghendov-Mosanu Dan Cristian Vodnar Daniela Cojocari 《Molecules (Basel, Switzerland)》2021,26(21)
The problem of functional foods with bioactive components of natural origin is current for the food industry. Plant extracts rich in polyphenols with antioxidant and antimicrobial activity are a promising source for use in improving the quality and characteristics of fresh meat and meat products. In this context, the purpose of the present study was to evaluate the physico-chemical, microbiological, sensory properties of sausages prepared with the addition of lyophilized extract of basil, thyme or tarragon. For the beginning, the total amount of polyphenols, the antioxidant and antimicrobial activity of the extracts obtained from three spices were evaluated. In the sausages previously infected with Staphylococcus aureus and Escherichia coli it was observed that there is a much larger number of colonies of microorganisms in the control sample compared to the other samples within 24 and 48 h. Moreover, following the addition of sausage extracts, no changes were found regarding their sensory acceptability. 相似文献
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Naser Boroomand Mohammad Sadat-Hosseini Mojtaba Moghbeli 《Natural product research》2018,32(5):564-567
The aim of this work was to evaluate the phytochemical components, minerals, the antioxidant activity and total phenol contents of the essential oil from aerial parts of six major medicinal plants in Rayen, Iran. The plants included Ranunculus arvensis, Teucrium polium, Dracocephalum polychaetum, Kelussia odoratissima, Artemisia sieberi and Thymus kotschyanus. Total phenol content ranged from 0.03 to 0.158 mg/mL. A. sieberi showed the highest radical scavenging ability (IC50 = 94 μg/mL). The amount of minerals ranged as follows: P (0.23–29%), K (1.08–4.76%), Ca (0.78–2.35%), Mg (0.24–0.94%), Cu (8.3–15 mg/kg), Cd (0.7–1.1 mg/kg), Pb (2–11.7 mg/kg) and Fe (250–1280 mg/kg). A total of 79 compounds were identified across all plants. The main components studied in the plants were l-perillaldehyde, biosol, carvacrol, 1,8-cineol, terpinyl acetate and 1,2,3,6,7,7 a-hexahydro-5 h-inden 5-one. 相似文献