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- Sigma-Aldrich
- 进口
- D9260-10G
- 2025年08月15日
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- 详细信息
- 文献和实验
- 技术资料
- 保存条件：
2-8°C
- 保质期：
根据瓶身LOT号查询
- 英文名：
Dextran from Leuconostoc mesenteroides
- 库存：
有现货
- 供应商：
浙江羽翔生物科技有限公司
- CAS号：
9004-54-0
- 规格：
10G
属性
生物来源
bacterial (Leuconostoc mesenteroides)
质量水平
200
表单
powder
旋光性
[α]/D 199°
分子量
average mol wt 9,000-11,000
溶解性
water: 0.1 g/mL, colorless to faintly yellow
储存温度
2-8°C
SMILES字符串
O1C(C(C(C(C1CO)O)O)O)OCC2OC(C(C(C2O)O)O)OCC(O)C(O)C(O)C(O)C=O
InChI
1S/C18H32O16/c19-1-5(21)9(23)10(24)6(22)3-31-17-16(30)14(28)12(26)8(34-17)4-32-18-15(29)13(27)11(25)7(2-20)33-18/h1,5-18,20-30H,2-4H2
InChI key
FZWBNHMXJMCXLU-UHFFFAOYSA-N
应用
小于60,000Da的葡聚糖通常被认为是低分子量葡聚糖。 低分子量葡聚糖的粘度、聚集和渗透性质使其通常优于高分子量葡聚糖。 高分子量、水溶性葡聚糖聚合物已可用于各种生物医学应用中。葡聚糖（9,000-11,000），是一种低分子量葡聚糖，可用于研究瞬时细胞膜和血脑屏障（BBB）透化等过程。在蛋白质包装和折叠研究中，它可以用作糖类拥挤剂。
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文献和实验Comparison of contrast media and low-molecular-weight dextran for frequency-domain optical coherence tomography.
Although an intracoronary frequency-domain optical coherence tomography (FD-OCT) system overcomes several limitations of the time-domain OCT (TD-OCT) system, the former requires injection of contrast media for image acquisition. The increased total amount of contrast media for FD-OCT image acquisition may lead to the impairment of renal function. The safety and usefulness of the non-occlusion method with low-molecular-weight dextran L (LMD-L) via a guiding catheter for TD-OCT image acquisition have been reported previously. The aim of the present study was to compare the image quality and quantitative measurements between contrast media and LMD-L for FD-OCT image acquisition in coronary stented lesions. Twenty-two patients with 25 coronary stented lesions were enrolled in this study. FD-OCT was performed with the continuous-flushing method via a guiding catheter. Both contrast media and LMD-L were infused at a rate of 4 ml/s by an autoinjector. With regard to image quality, the prevalence of clear image segments was comparable between contrast media and LMD-L (97.9% vs. 96.5%, P=0.90). Furthermore, excellent correlations were observed between both flushing solutions in terms of minimum lumen area, mean lumen area, and mean stent area. The total volumes of contrast media and of LMD-L needed for OCT image acquisition were similar. FD-OCT image acquisition with LMD-L has the potential to reduce the total amount of contrast media without loss of image quality.
)。 2.3 试剂 1. 产品和液体贮存液 ( 1 ) 葡聚糖 T-500 和聚乙二醇（PEG ) 3350 分别购自 Amersham 和 Union Carbide。根据分子质量分别配制 20% 和 40% 的葡聚糖 T-500 和 PEG 3350 的贮存液（见注释 1)。 ( 2 ) 0.2 mol/L 的二水 EDTA 钠盐（的 EDTA - Na2) 贮存液的配置：500 ml 的水 ( 终体积）溶解 37.2 g 的 EDTA -Na2。在粉末中用 Trizma 碱（Sigma
乙酰基转移酶基因（bar），作为选择标记，该基因由花椰菜病毒启动子(CaMV35S ) 驱动，以农杆菌胭脂氨酸合成酶基因（nos ) 的 3' 非编码区为终止子。胁迫抗性基因来源于大麦胚胎发生后期的富集蛋白基因（Shva1) ，由水稻肌动蛋白 Act1 的启动子驱动，以马铃薯蛋白水解酶抑制子II ( pin ll ) 的 3' 非编码区为终止子（ 图 10.1) 。 (2) pAct1-D：含有由 Act1 启动子驱动并利用 nos 终止子的大肠杆菌 β-葡萄糖醛酸酶基因（gus） （ 图
Replication timing by density transfer
easier to dilute a solution that's too dense than to make a too-dilute solution more dense!) CsCl solution : Use 1.28 g dry CsCl per gram of 10 mM Tris, 100 mM EDTA , pH 7.5. The T10 E100 should have a refractive index of 1.3395
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