从蒙古图瓦省采集的薄蒴草(Leptopyrum fumarioides (L.) Reichenb.)地上部分中,分离出了两种新型罕见的苄基四氢异喹啉 N 氧化物 ——Leptomonines A 和 B。通过二维核磁共振(2D-NMR)和圆二色谱(CD)光谱分析,确定了它们的化学结构、绝对构型和构象。Leptomonine A(1)能够抑制脂多糖(LPS)刺激的 RAW 267.4 细胞中肿瘤坏 ...
After hours: March 18 at 7:16:59 PM EDT Loading Chart for NMR ...
A new way to create ultra-thin layers of metals makes it possible for scientists to study a new and unusual class of 2D materials. Researchers in China used the technique to make layers of five ...
研究人员利用高分辨质谱(HRMS)、一维和二维核磁共振(1D 和 2D NMR)以及电子圆二色谱(ECD)分析等多种光谱分析方法对它们的结构进行了表征。对所有分离出的化合物(1 - 7)针对人结肠癌细胞系 HCT116 进行了细胞毒性活性评估,发现这些化合物表现出中等的 ...
A wonderful list of Game Development resources.
科学技术的发展离不开科研仪器的进步。凯视迈(KathMatic)自2014年创建以来,一直“致力于高精尖光学测量技术”,已成为集“研发、制造、销售”为一体的国产高端光学精密测量仪器新力量。推出了KC系列多功能精密测量显微镜、KS系列超景深3D数码显微 ...
Polymer Chemistry Communications contain novel scientific work of such importance that rapid publication is desirable. Authors should briefly indicate in a covering letter the reasons why they feel ...
Pymunk is a easy-to-use pythonic 2d physics library that can be used whenever you need 2d rigid body physics from Python ...