共查询到20条相似文献，搜索用时 140 毫秒
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蕨菜是一种具有较高经济价值的野生蔬菜，各种氨基酸的含量很高，还含有胆碱、麦角固醇等营养物质。蕨菜分布在世界各地，我国有丰富的野生蕨菜资源，主要分布在西北、华北、东北、西南各省。采食蕨菜已有悠久历史，它不仅在国内市场深受欢迎，而且也是出口创汇的重要农产品。蕨菜以初生叶芽及未展开的羽状叶和幼嫩的叶柄为食用部分，嫩叶营养丰富，别具风味，可加工成各种菜肴。蕨菜多生于浅山荒坡，或林下草地和沙砾山坡，春夏季生长茂盛。蕨菜的适应性较强，春季出土早，可调节早春蔬菜淡季市场。鲜蕨全草入药，有清热滑肠，降气化痰，利水安神，降压、抗惊厥、恢复脑细胞功能等功效。蕨富含y-氨基丁酸，在临床上用于治疗高血压、头昏失眠等症。荚果蕨还具有治疗蛲虫病、虫积腹痛、赤痢便血、子宫出血、湿热肿痛等功效。此外，蕨菜根茎含淀粉量很高，可制淀粉；植株纤维可做造纸、制绳原料。常见的食用蕨菜种类有：(1)荚果蕨(MatteucciaeStruthiopteris L.)，球子蕨科，又称黄瓜香。(2)蕨菜(Pteridium aquilinumL.)，凤尾蕨科，又称蕨儿菜、拳菜、龙须菜、鹿角菜等。(3)多齿蹄盖蕨(Athyriumbrevifrons)，龙骨科... 相似文献
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蕨中毒是动物大量采食野生蕨后,发生高热、贫血、血小板减少、血凝不良、全身泛发性出血等特征性症状的中毒性疾病。蕨属植物在分类学中属于蕨类植物门(Pterido-phyta),真蕨亚门(Filicophtina),薄囊蕨纲(Lepto-sporangiopsida)、真蕨目(Filicales)中的蕨科。已知毒种有欧洲蕨、尾叶蕨及毛蕨。在我国引起蕨中毒的常见品种有欧洲蕨的斜羽变种[P.aquilinum(L)Kuhn var.latiusculum(Desv.)Undrew]和毛蕨[P.revolutum(BL)Nakai]两种。蕨类植物中所含的有毒成分主要有:硫胺酶(thiaminase)、皮酮(quercetin)及相关化合物、蕨素与蕨甙、原蕨甙… 相似文献
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<正> 草地占英国农地总数的70％以上,西、北部几乎全是草地(图1)。这些草地有土壤肥沃、以黑麦草(Lolium spp.) 占优势、产量高的平原草场;有比较贫瘠、崎岖的丘陵和山地草场,其优势牧草为质量低的甘松茅属(Nardus)、石兰属(Calluna spp.)和欧洲蕨(Pteridium aqmuilinum)。它们在植被组成、干物质产量和畜产量方面存在着巨大的差别。 相似文献
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用不同的处理方法对蕨麻球茎进行处理.1个月以后的观察结果表明,球形的蕨麻球茎成活率最高,且蕨麻的种块形状、溶液的浓度与浸泡时间互作、蕨麻块根与溶液浓度的互作均会影响蕨麻芽的个数. 相似文献
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西藏自治区是全国五大牧区之一,草地资源丰富,草地畜牧业历史悠久而独具特色.加强草地保护和建设,合理利用草地,确保草地永续利用对促进草地畜牧业向稳定、高效、优质、高产方向发展,繁荣西藏经济具有重要意义.笔者通过对西藏草地资源的特点及利用现状的分析,阐述了对西藏草地利用与建设的拙见. 相似文献
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云南岩溶地区不同草地利用方式的经济与水保效应 总被引：1，自引：1，他引：0
对云南岩溶地区坡度为15°草地的5种利用方式进行了3年的水土流失、土壤理化性状、地表植被密度、盖度、高度、产草量和投入产出效应研究.结果表明,岩溶地区坡地种草利用比种粮利用的水土保持效果、培肥地力效应和经济效益高.水土流失严重程度为种粮坡地＞自由放牧草地＞栽培草地＞改良草地＞围栏封育草地;土壤肥力提高幅度为栽培草地＞改良草地＞围栏封育草地＞自由放牧草地＞种粮坡地;3年累计经济纯收入栽培草地＞改良草地＞种粮坡地＞围栏封育草地＞自由放牧草地. 相似文献
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西藏阿里地区草地退化现状与防治措施 总被引：13，自引：0，他引：13
草地畜牧业是阿里地区社会经济的主导产业,牧业产值占农、林、牧、渔业总产值的90.26%,而草地资源因各种因素导致退化较重,产量下降,个别地方已影响到牧民的生活质量.为防止草地退化,需加强草地建设投资力度,扩大人工改良草地面积,增加草地的生产能力,提高牧民的生活水平. 相似文献
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Anna Haug Rune R⊘dbotten Liv Torunn Mydland Olav Albert Christophersen 《Acta Agriculturae Scandinavica, Section A - Animal Sciences》2013,63(2):71-77
Abstract A feeding experiment involving histidine supplementation to broiler feed resulted in increased concentration of the histidine containing dipeptides anserine and carnosine in broiler breast muscle. Supplementation with 1 g histidine per kg feed gave a 64% increase in carnosine, and about 10% increase in anserine in the muscle. The standard broiler feed concentrate now in use in Norway seems to contain less histidine than what may be needed for optimal synthesis of carnosine and anserine. These dipeptides have important roles as antioxidants, pH buffering agents and anti-glycation agents. They may have important roles in meat for increasing its stability, shelf life and antioxidant capacity, and it might be speculated that broiler meat rich in anserine and carnosine in the future will be considered a type of functional food, having possible health-beneficial effects. Histidine supplementation of standard Norwegian broiler feed concentrate should be considered. 相似文献
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Shozo TOMONAGA Yuji KAJI Tetsuya TACHIBANA D. Michael DENBOW Mitsuhiro FURUSE 《Animal Science Journal》2005,76(3):249-254
Carnosine, and its derivative anserine, are known to function as anti‐oxidants and putative neurotransmitters. They are especially rich in the breast muscle (Musculus pectoralis superficialis, MPS) of chickens. To clarify whether the concentrations of carnosine and anserine are altered by dietary management, the effect of oral administration of their constituent, β‐alanine (β‐Ala), was determined in the MPS and brains of chickens. Birds were orally administered β‐Ala (22 mmol/kg) twice a day for five consecutive days (from 2 to 6 days old). In the MPS, carnosine was increased by β‐Ala, whereas anserine and taurine were decreased. The concentrations of other free amino acids in the MPS were also modified by β‐Ala. In the brain, the oral administration of β‐Ala increased anserine and carnosine and decreased taurine, but caused no changes to other free amino acid concentrations. These results suggest that orally administered β‐Ala increases carnosine concentrations in both the MPS and brains of chickens. However, the effects of β‐Ala on other concentrations differ depending on the tissues. 相似文献
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青藏高原东缘鹅绒委陵菜种群克隆结构的研究 总被引：2，自引：0，他引：2
本研究采用RAPD标记对不同海拔下分布的鹅绒委陵菜6个种群进行了克隆结构、克隆多样性以及克隆多样性与海拔因子之间相关性的研究。研究结果表明,13条随机引物对120个个体进行PCR扩增,扩增到132条带,其中多态性条带117,多态位点比率(PPL)为88.64%,共检测到68个基因型,且克隆多样性水平较高,Simpson指数平均为0.875,基因型比率PD平均为0.527。鹅绒委陵菜种群内克隆之间的镶嵌明显,这可能与它的克隆构型有关。采用SPSS软件对鹅绒委陵菜种群的克隆多样性与海拔进行相关性分析,结果显示,它们之间并无显著的相关性。 相似文献
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Prodip Kumar Sarkar Ai Egusa Mei Matsuzaki Tomohiro Sasanami 《The Journal of Poultry Science》2021,58(3):186
Sperm motility is considered as one of the most important traits for successful fertilization, but the motility of an ejaculated sperm decreases with time when stored as liquid. It is reported that seminal plasma serves as a nutrient rich medium for sperm and plays an important role in sperm motility and its fertilization ability. Several studies have reported that imidazole dipeptides such as anserine and carnosine affect sperm motility and its fertilization ability in mammals. In this study, we report the presence of anserine and carnosine in the male reproductive tract of the Japanese quail. Abundant levels of anserine (44.46 µM) and carnosine (41.75 µM) were detected in the testicular fluid and seminal plasma respectively using the amino acid analyzer; however, seminal plasma solely contained carnosine. When the ejaculates were incubated with anserine or carnosine, we found that both the dipeptides improve sperm motility parameters such as straight line velocity, curvilinear velocity, average path velocity and amplitude of lateral head displacement after in vitro sperm storage at 15°C. These results indicate that imidazole dipeptides are present in the male reproductive tract and may improve sperm quality during in vitro sperm storage in the liquid states. 相似文献
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Ducci M Pacchini S Niccolini A Gazzano A Cerri D Gadea J Bobowiec R Sighieri C Martelli F 《Polish journal of veterinary sciences》2006,9(3):159-163
The present study deals with the application of high-performance-liquid-chromatography (HPLC) method for a quantitative detection of carnosine, anserine, L-histidine and 3-methyl-L-histidine in biological material with o-phthaldialdehyde (OPA) post column derivatisation at the constant temperature of 50 degrees C. For this purpose, some mobile-phases were prepared with scalar acetonitrile concentrations. A complete separation of all molecules, particularly for carnosine and 3-methyl-L-histidine, was obtained with a solution of acetonitrile and 6mM hydrochloric acid with 0.48 M sodium chloride (5%:95% v/v). Post column derivatisation reaction at temperature of 50'C permitted to obtain an increase in sensibility of all molecules. This method has been utilised for detection of histidine dipeptides in boar spermatozoa and in sheep milk. Concentrations (mean +/- S.E. nmol/10(9) spermatozoa) of carnosine (0.96 +/- 0.14) and anserine (0.83 +/- 0.18) in boar spermatozoa were significantly lower than those of L-histidine (52.85 +/- 4.86) and 3-methyl-L-histidine (83.07 +/- 7.1). Positive correlation was found between carnosine and anserine contents (r = 0.740; p < 0.01) and between L-histidine and 3-methyl-L-histidine (r = 0.657; p < 0.01). All histidine dipeptides studied were also present in 40 samples of sheep milk. In a case of samples without unit-forming colonies (UFC) of Staphylococcus coagulase-positive, carnosine concentrations (9.17 +/- 0.89 nmol/ml) were higher than anserine (0.51 +/- 0.02 nmol/ml) and both were significantly lower in respect to L-histidine (49.51 +/- 6.48 nmol/ml) and 3-metyl-L-histidine (81.21 +/- 6.82 nmol/ml). A negative correlation was observed between carnosine milk levels (r = -0.773; p < 0.01) and UFC/ml of Staphylococcus coagulase-positive. In conclusion this very simple and fast method can be used to detect histidine dipeptides in biological compartments where their concentrations are very low. 相似文献
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1. Carnosine and anserine have been measured in samples of breast and leg muscles from three turkeys. 2. The results show that there is a large difference in the dipeptide content between the two types of muscle. 相似文献
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科学发展观的评价指标体系构建 总被引：2，自引：0，他引：2
本文通过对科学发展观基本内涵的剖析，以及专家们的见仁见智，得出科学的发展观应该是经济发展、社会进步、生态良好，并通过运用模糊数学方法在层次分析法的基础上对一些核心的量化指标进行了综合评价和权重的优化，进而构建了科学发展观的评价指标体系，以期能更为科学地评价我们的社会是否在更加科学地发展。 相似文献
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Effects of slaughter age on the levels of free amino acids and dipeptides in fattening cattle 总被引：1，自引：0，他引：1
The effects of slaughter age, breed type and postmortem period were studied on the concentrations of free amino acids (FAA) and dipeptides (carnosine and anserine) in Longissimus dorsi muscle of beef. Slaughter age affected the levels of most FAA and dipeptides, and the concentrations of these compounds were significantly lower at 35 months of age than either 15 or 25 months of age. Slight increases were observed at 25 months compared with 15 months, but the differences were not significant except for a few FAA. These tendencies still remained when the concentrations were recalculated on the basis of protein. A significant breed effect was observed for taurine, carnosine and anserine. Almost all FAA were significantly increased during postmortem conditioning, but the level of each FAA fluctuated, and the fluctuations could not be explained statistically by slaughter age or breed differences. 相似文献