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HSW FINE-JECT® Single-use needles

Disposable HSW FINE-JECT® needles (suitable for Luer and Luer Lock),0.50 x 16 mm 25 G x 5/8"

Company: Henke-Sass, Wolf
Catalog#: 4710005016
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Soluble and Solid Iron Reduction Assays with Desulfitobacterium hafniense
Author:
Date:
2018-09-05
[Abstract]  There is a pressing need to develop sustainable and efficient methods to protect and stabilize iron objects. To develop a conservation-restoration method for corroded iron objects, this bio-protocol presents the steps to investigate reductive dissolution of ferric iron and biogenic production of stabilizing ferrous iron minerals in the strict anaerobe Desulfitobacterium hafniense (strains TCE1 and LBE). We investigated iron reduction using three different Fe(III) sources: Fe(III)-citrate (a soluble phase), akaganeite (solid iron phase), and corroded coupons. This protocol describes a method that combines spectrophotometric quantification of the complex Fe(II)-Ferrozine® with mineral characterization by scanning electron microscopy and Raman spectroscopy. These three ... [摘要]  迫切需要开发可持续和有效的方法来保护和稳定铁制物体。为了开发腐蚀铁物体的保护 - 恢复方法,该生物方案提出了研究严格厌氧菌[Desulfitobacterium hafniense (菌株TCE1)中三价铁的还原溶解和稳定亚铁矿物质的生物产生的步骤。和LBE)。我们使用三种不同的Fe(III)来源研究了铁还原:Fe(III) - 柠檬酸盐(可溶相),akaganeite(固体铁相)和腐蚀的试样。该协议描述了一种方法,该方法结合了复杂的Fe(II)-Ferrozine ®的分光光度定量,通过扫描电子显微镜和拉曼光谱进行矿物表征。这三种方法可以评估三价铁的还原溶解和生物矿物质生产,作为开发一种创新的可持续方法来稳定腐蚀铁的有希望的替代方法。

【背景】自铁器时代以来,铁已被用于生产日常用具。因此,考古学上的铁试验是过去极其重要的证据,应予以保留。然而,由于其反应性,铁容易被腐蚀并且考古铁物体可能被完全损坏。埋藏时,铁制品会根据埋葬地点的环境条件形成复杂的腐蚀层。挖掘后,条件发生变化,腐蚀层变得不稳定。为避免完全破坏,考古铁制物需要快速稳定处理。目前,可用的稳定化处理不能提供长期保护并且具有实质性缺点,例如毒性,低效率和大量废物的产生(Scott和Eggert,2009; Rimmer 等人, 2012)。因此,有必要开发新技术来稳定考古铁器。

越来越多地考虑利用微生物代谢来开发更有效,可持续和环保的保护 ...

In vitro Brainstem-spinal Cord Preparation from Newborn Rat
Author:
Date:
2016-11-20
[Abstract]  The brainstem-spinal cord preparation of newborn rat contains neural networks able to produce motor output in absence of sensory feedback. These neural structures, commonly called central pattern generators (CPGs), are involved in many vital functions such as respiration (Morin and Viala, 2002; Giraudin et al., 2008) or locomotion (Juvin et al., 2005). Here we describe a procedure for the isolation of the brainstem-spinal cord tissue of neonatal rat (0-2 days old). A surgical method under binocular microscope allows the brainstem and the spinal cord to be isolated in vitro and the motor outputs to be recorded. This preparation can then be used for diverse experimental approaches, such as electrophysiology, pharmacology or anatomical studies, and constitutes a ... [摘要]  新生大鼠的脑干 - 脊髓制备包含能够在没有感觉反馈的情况下产生运动输出的神经网络。 这些神经结构,通常称为中枢模式发生器(CPG),涉及许多重要功能,如呼吸(Morin和Viala,2002; Giraudin等,2008)或运动(Juvin等,2005)。 在这里,我们描述了分离新生大鼠脑干脊髓组织(0-2天)的程序。 双目显微镜下的手术方法允许脑干和脊髓在体外被分离,并且马达输出被记录。 然后,该制剂可用于多种实验方法,例如电生理学,药理学或解剖学研究,并且构成研究CPG之间相互作用的有用模型(Juvin等人,2007; 2012; Giraudin等,2012; Le Gal 等人,2014; 2016)。
【背景】历史上,开发了新生儿啮齿动物的体外脊髓来研究脊柱反射(Otsuka和Konishi,1974)。 1984年,Suzue率先开发出新生大鼠的体外脑脊髓脊髓制剂。因此,有可能证明孤立的中枢神经系统能够自发产生所谓的虚构的呼吸活动。之后,可以确定运动员节奏生成所依赖的CPG的位置(Cazalets等,1995; Kjaerulff和Kiehn,1​​996; Ballion等,2001)和那些从事呼吸节律生成(Smith et al ,1991; ...

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