Test No. 118: Determination of the Number‐Average Molecular Weight and the Molecular Weight Distribution of Polymers using Gel Permeation ChromatographyPolymerMolecular weightGPCThis Test guideline describes the Gel Permeation Chromatography (GPC). This method permits to determine the molecular weight ...
athe number average molecular weight (Mn) was determined by gel permeation chromatography (GPC) using commercially available PECH and polystyrene standards as reference in THF. 数字平均分子量(Mn)在THF取决于胶凝体渗透过程色谱法(GPC)使用买得到的PECH和多苯乙烯标准作为参考。[translate]...
To further demonstrate the value of ANN in regression, the relationship curve between the simulated tensile stress (TS) and the number-average molecular weight (Mn) is learned. An ANN with two hidden layers was constructed; each layer contains 4 neuron models with sigmoid activation functions. Fi...
A polyester resin has a molecular weight distribution (MWD) of approximately from 1.0 to 2.2, wherein molecular weight distribution (MWD) is a weight-averaged molecular weight (Mw)/a number-averaged molecular weight (Mn); and a luminosity (L*) of from ap
We became aware, in the course of our on-going research, that the number-average molecular weight of poly(1,4-trans isoprene) determined by conventional gel permeation chromatography (GPC) in tetrahydrofuran (THF) using polystyrene standards differs from its true value by a factor 2. As far ...
Nature Communications volume 12, Article number: 2668 (2021) Cite this article 8604 Accesses 10 Altmetric Metrics details This article has been updatedAbstract Telomeres are bound by dedicated proteins, which protect them from DNA damage and regulate telomere length homeostasis. In the nematode ...
which are discussed in detail in this review. The zero-order network consists of 16 nodes. The number of edges (n = 50) exceeds the expected number of edges (n = 13) withp-enrichment value of 2.22E–15, average node degree = 6.25 and average local clustering coefficient = 0.7...
(i.e., surface area, pore volume and size)of the activated carbon were assessed through N2adsorption–desorption isotherms at 77 K, utilizing a volumetric adsorption analyzer (Micromeritcs, ASAP 2020, USA). Specific surface area, total pore volume, and average pore size were determined using ...
Table 2 The average number of glial cells in the ventral white matter of rat spinal cords Full size table Morphological characterization of SCI-induced neuronal and glial apoptosis By counting TUNEL-positive cells in the sections 0, 1, 2 and 4 mm from the epicenter in the cord removed at ...
molecular weight (g/mol) mi mass after initial thermal pre-treatment (g) Me metal ions MA magnesium acetate tetrahydrate MD magnesium D-gluconate hydrate MO magnesium oxide MN magnesium nitrate hexahydrate n number of moles pHA acidic pH pHN neutral pH SA strontium acetate hemihydrate SD strontium...