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Balance

BSA Analytical Balance

Company: Sartorius
Catalog#: BSA224S-CW
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GC-MS-Based Analysis of Methanol: Chloroform-extracted Fatty Acids from Plant Tissues
Author:
Date:
2018-09-20
[Abstract]  Fatty acids (FAs) are carboxylic acids with long aliphatic chains that may be straight, branched and saturated or unsaturated. Most of the naturally occurring plant FAs contains an even number of carbon (C4-C24). FAs are used in food and pharmacological industries due to their nutritional importance. In addition, FAs are considered as a promising alternative for the production of biodiesel from terrestrial plant biomass. To establish commercial applications, more reliable analytical methods are needed for the identification, quantification, and composition determination of FAs. Here, we describe a relatively rapid and sensitive method for the extraction, identification, and quantification of FAs from a small quantity of plant tissue. The method includes steps of lipid extraction, ... [摘要]  脂肪酸(FAs)是具有长脂肪链的羧酸,其可以是直链,支链和饱和或不饱和的。大多数天然存在的植物FA含有偶数碳(C4-C24)。由于其营养重要性,FA用于食品和药理学工业。此外,FAs被认为是从陆地植物生物质生产生物柴油的有前途的替代品。为了建立商业应用,需要更可靠的分析方法来确定FA的鉴定,定量和组成。在这里,我们描述了一种相对快速和灵敏的方法,用于从少量植物组织中提取,鉴定和量化FA。该方法包括脂质提取,通过转甲基化将脂质转化为脂肪酸甲酯(FAME),使用气相色谱 - 质谱(GC-MS)鉴定和定量FAME的步骤。在该方案中,在GC-MS分析之前添加内标。每个FA的量由其相对于内标峰面积的峰面积计算。

【背景】脂肪酸的合成对于代谢能的储存是重要的。不断增长的人口和能源成本强调了生产可持续可再生燃料的必要性。第二代生物燃料的来源是非食用油籽作物或木质纤维素生物质,主要包括作物植物的废弃物,如多年生草,包括柳枝稷,果壳,稻草和森林残留物(Hadar,2013)。在这种情况下,植物可以作为研究脂肪酸用于营养保健品和生物柴油方面的优秀系统。此外,在生物柴油生产中,燃料的清洁燃烧性质受到FA的结构特征的影响,包括链长和不饱和度(Knothe,2005)。木质纤维素生物质是直接从经济有效的资源生产这些产品的更环保的替代品。使用GC-MS进行FA分析可以对单一植物提取物中相对多种脂肪酸进行标准化,注释和定量。脂质提取的效率取决于溶剂的极性。极性脂质(如糖脂或磷脂)更易溶于极性溶剂(如醇类),非极性脂质(如三酰基甘油)更易溶于非极性溶剂(如氯仿)。因此,总脂质提取取决于有机溶剂的性质。 ...

In vitro Floral Induction of Cuscuta reflexa
Author:
Date:
2017-01-20
[Abstract]  Floral initiation and development in the angiosperms is the essential step on which the yield of the plant depends. Sometimes external climate or any abiotic stress hinders the floral initiation and ultimately affect the plant yield. Hence, in vitro floral induction and development can help to overcome the external climatic factor. Furthermore, the protocol for in vitro floral induction in the parasitic angiosperm like Cuscuta reflexa has not been reported yet. We have standardized the protocol for floral induction in the parasitic plant Cuscuta reflexa. In this study it is established that MMS (modified Murashige Skoog) media supplemented with 2 mg L-1 NAA (naphthalene acetic acid, plant growth regulator) and 2 mg L-1 2,4-D ... [摘要]  被子植物的花卉引发和发育是植物产量依赖的关键步骤。有时,外部气候或任何非生物胁迫阻碍花卉开始,最终影响植物产量。因此,体外花卉诱导和发育可以帮助克服外部气候因素。此外,尚未报道如在睾丸反射中的寄生被子植物体外花诱导的方案。我们已经规定了寄生植物茧丝反射中花诱导的方案。在本研究中,确定补充有2mg L NAA(萘乙酸,植物生长调节剂)和2mg L -1的MMS(改良的Murashige Skoog)培养基> 2,4-D(2,4-二氯苯氧基丙酸,植物生长调节剂)在体外拍摄后支持花诱导。此外,我们发现补充有2mg L-sup-2,4-D的MMS培养基从淋巴结外植体直接快速诱导花蕾,而没有任何芽伸长。该协议将有助于研究人员在其他被子植物植物中诱导花along与镰刀菌反射。背景 睾丸反射是寄生在大量被子植物上寄生的被子植物(Kuijt,1969)。在宿主植物中造成严重损害和产量损失的能力使得该物种对科学研究非常重要(Nun and Mayer,1999)。除了少数具有功能性叶绿体(Hibberd等人,1998)之外,大多数Cuscuta 物种是非叶绿体。从较大的胚胎开发幼苗。已经报道了白色介质中的反射(Maheshweri和Baldev,1961)。花卉诱导。反射炎在短时间内以及黑暗条件已经在体外中看到(Baldev,1962)。 ...

Pot Level Drought Stress Tolerance Assay in Tobacco through Plant Phenotyping and Antioxidant Assay
Author:
Date:
2015-10-05
[Abstract]  Drought is an important abiotic factor which has a huge detrimental impact on crop productivity. Study of plant responses towards drought stress and investigating the mechanism of drought tolerance is crucial for achieving the target of developing drought-tolerant plants. Phenotyping is a cost effective approach which can be adopted to evaluate the severity of drought stress in a plant. Next to phenotyping parameters, biochemical parameters such as the study of antioxidant enzyme activity play significant roles in assessing the extent of drought stress caused injury in a plant. Among the antioxidant enzymes, ascorbate peroxidase is an enzyme which plays a crucial role in drought tolerance in plants. It has been well established that the activity of this enzyme increases under drought ... [摘要]  干旱是一个重要的非生物因素,对作物生产力有巨大的不利影响。研究植物对干旱胁迫的反应和研究干旱耐受机制对于实现发展耐旱植物的目标是至关重要的。表型是一种成本有效的方法,可用于评价植物中干旱胁迫的严重性。除了表型参数之外,生物化学参数例如抗氧化酶活性的研究在评估植物中干旱胁迫引起的损伤的程度中起重要作用。在抗氧化酶中,抗坏血酸过氧化物酶是在植物的耐旱性中起关键作用的酶。已经确定该酶的活性在干旱胁迫下增加。在这里,我们提出了一个简单和可重复的协议,以调查烟草植物对干旱胁迫通过测量表型参数和抗氧化酶活性的反应。虽然,这些实验已经进行了烟草植物,这个协议可以采用其他作物品种。

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