Beyond these limits, eb and the fracture resistance continue to increase, tending toward a plateau value in the limit of very high molar mass. Un-notched iPP, for example, has been observed to show eb of only 9% for Mw =250 kg mol-1 whereas a plateau value of over 800% is reached ...
where ∑i means to sum over all values of i. The total mass of the system of particles is M = ∑imi. For a rigid body the summation over individual masses is replaced by an integral over the volume of the body. The center of mass is then defined by R=1M∫∫∫VρrdV, where M ...
sodium atom (since it is missing an electron), this difference will be offset by the fact that a chloride anion is slightly more massive than a chlorine atom (due to the extra electron). Moreover, the mass of an electron is negligibly small with respect to the mass of a typical atom...
In the ME, thyro-parathyroidectomy resulted in a 40% increase in the mass and a 100% increase in the in situ molar activity of TH over that of sham Tx rats. Compared to Tx animals given 0.15 M NaCl, Tx rats treated with a low dose of T4 (10 碌g/day/kg BW) had a reduced ...
athe mesh size over the thread region should be smaller than a quarter of the pitch distance 网格大小在螺纹区域应该小于沥青距离四分之一[translate] aclean warm water, 清洗温暖的水,[translate] aMonday noon with Ni Li to come to you to eat French food, shall we? 星期一中午与Ni来的李到您...
Moreover, the restacked 2D Na2W4O13 electrode demonstrated good stability since after 10,000 cycles at 10 mV s−1, the capacitance still remained at 93% of its initial value (Supplementary Fig. 22c). In addition, the 2D Na2W4O13 dispersion is uniform enough that the colloidal state...
The chiral dendrons can be synthesized efficiently on a multi-gram scale from L -lysine by a solution peptide coupling method, and the over-all yields for the first ( MG1 ) and second ( MG2 ) generation macromonomers are 77 and 75%, respectively. High molar masses (1 to 2 million) ...
ensure that you avoid end-over-end rotation or vortexing; instead gently tap the column to disperse the resin. When removing plugs from columns, be sure to avoid pushing liquid back into the column from the plug reservoir. After elution, do not store t...
In contrast to natural polymers, which have existed for billions of years, the first well-understood synthetic polymers date back to just over one century ago. Nevertheless, this relatively short period has seen vast progress in synthetic polymer chemistry, which can now afford diverse macromolecules...
The sphalerite oxidative kinetics under hypergene condition was simulated and studied by means of a mixed flow reactor over a pH range of 1.0–7.8, and at ... Ziping,Pan,Lin,... - 《Chinese Journal of Geochemistry》 被引量: 6发表: 2012年 Crystal Structure and Optical Properties of Cd32S1...