2017年6月18日 · The flocculation efficiency of the native gums increased after modifications from 60.76% (ASN) to 96.03% (ASG) and 60.80% (AGN) to 96.38% (AGG) at 10 ppm, with significant increase as the dosage increased.

The ring HN proton of tryptophan has a chemical shift near 10 ppm. There is usually a strong NOE peak from the ring HN proton to the nearest C-H proton on the same 5-member ring.

体积浓度是用每立方米的大气中含有污染物的体积数（立方厘米）或（ml/m3）来表示，常用的表示方法是ppm，即1ppm=1立方厘米/立方米=10-6。 除ppm外，还有ppb和ppt，

5 天之前 · Here, we present the complete assignment of 1 H and 13 C signals for the Asn-linked G1M9 glycan, modified at its N-terminus with a 9-fluorenylmethyloxycarbonyl (Fmoc) group (Fmoc-Asn-G1M9). Using conventional two-dimensional NMR techniques including 1 H- 1 H COSY, 1 H- 1 H NOESY, 1 H- 13 C HSQC, 1 H- 13 C HMBC and 1 H- 13 C HSQC-TOCSY, we ...

2015年1月1日 · For example, a Cβ shift of ~ 37–45 ppm could correspond to Asn, Asp, Cys, Ile, Leu, Phe or Tyr. If this residues is found to have a pair of Hβ shifts at ~ 1.5 ppm, then it can be assigned unambiguously to Leu.

Shop Aqua Solutions Nitrogen Standard 10 ppm | 7727-37-9 | MFCD00011416 | 500 mL at Fishersci.com

1994年4月1日 · A screening method for the determination of aldicarb (AS) and its sulfoxide (ASX) and sulfone (ASN) metabolites in tobacco at low ppm levels is described. Tobacco samples are extracted using methanol with the aid of sonication at ambient conditions.

2021年3月1日 · Briefly, samples for NMR analysis were prepared by dissolving synthesis peptide in D 2 O or PBS (10% D 2 O/90% H 2 O, pH 5.3) to a final connection of 10 mM and transferred into a 5 mm NMR tube prior to the NMR analyses.

ppm到百分比，数字转换计算器。 示例：找出300ppm中有多少百分比。 ppm到百分数的转换：计算器以及转换方法。

Op voorraad Combi test Nitriet en Nitraat Meetbereik- Nitraat 0-50 ppm - Nitiet 0-10 ppm (asN) Aantal: 50 tests in busje