Polyacrylamide (PAM) was prepared by a new method of inverse microemulsion polymerization, with (NH4)2S2O8-Na2SO3 as initiator and liquid paraffin/Span80-Op10/AM-H2O-NaAc as...

2006年11月17日 · In this paper, we investigate a novel acrylamide/methacrylic acid template copolymer in aqueous solution by 1D and 2D NMR techniques. The obtained results show that hydrogen bonds are formed between the PAM and PAA blocks at acidic and neutral solutions.

The polyacrylamide (PAM)/sodium montmorillonite (Na-MMT) nanocomposites were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, and scanning electron...

2011年5月25日 · High molecular weight polyacrylamide (PAM) was synthesized by polymerization of acrylamide in an aqueous solution using ammonium persulfate and N,N,N′,N′-tetra methyl ethylene diamine (TMEDA) as a redox initiation system. The ratio of TEMED/APS was set at 0.4976 μl/mg and the reaction was conducted at room temperature overnight.

PAM及P (AM/AA)的动态NMR研究通过改变PAM和P (AM/AA)样品溶液PH值所进行的的'H-NMR实验.由分子中酰胺氢共振峰型的改变观察了酰胺质子与外界的交换速率变化,提出了对于溶液的酸性,碱性和中性条件下,胺基质子交换受到的催化机理的推论.通过'H-NMR的变温实验,测定了PAM ...

1996年1月1日 · The PAM polymer itself does not contribute a proton NMR signal to imaging echoes because the PAM polymer is a plastic solid before it is swollen. After the PAM polymer was swollen, the motion of the molecular chain segments of PAM …

PABC is a phylogenetically conserved peptide-binding domain primarily found within the C terminus of poly (A)-binding proteins (PABPs). This domain recruits a series of translation factors including poly (A)-interacting proteins (Paip1 and Paip2) and release factor 3 (RF3/GSPT) to the initiation complex on mRNA.

2011年2月17日 · Fig. 1 (c) shows the 1 H NMR spectrum of as-prepared PAM-2 heated at 50 °C for 12 h in air to form a homogeneous DMSO-d 6 solution. It was found that the intensity of the aldehyde peaks (10.19 ppm) increased and that of azomethine hydrogen peaks (9.02 ppm) diminished as temperature increased.

聚丙烯酰胺中耐温抗盐功能单体主要通过IR、MS、Py-GCMS、NMR等进定性定量分析。 常见的耐温抗盐型聚丙烯酰胺一般为阴离子聚丙烯酰胺，其 红外谱图 会在1670cm-1处和1570cm-1处有明显的酰胺特征峰和 羧酸盐 特征峰。 对于引入强电解质单体的耐温抗盐型聚丙烯酰胺，一般在1200cm-1处和1050cm-1处有明显的 磺酸基团 特征峰。 如下图所示，该耐温抗盐型聚丙烯酰胺有明显的磺酸基团，其耐温抗盐功能单体中磺酸类单体含量较高。 耐温抗盐型聚丙烯酰胺由于 …

A series of novel ladder-type poly (azomethine amide)s (PAMs) were prepared from new azomethine containing carboxylic acid monomer (TCA) with simple aromatic diamines and aromatic diamines with...