Chemical recycling of plastic waste has promise as a complementary technology to increase eco-efficiency plastics life cycles. Accumulation impurities in feed streams can affect sensitive compounds such the Ziegler–Natta catalyst systems commonly used produce polyolefins high density polyethylene (HDPE) and linear low (LLDPE). In poison study, influence impurities—more specifically NO N2O—on sy...

In agroecosystems, effective straw return modes are one of the key practices for increasing soil fertility and carbon (C) availability. Although they improve quality, there is currently little information available regarding influence distinct with respect to potential organic (SOC) sequestration. this study, we established a five-year (2015–2019) field experiment in Mollisols Northeast China, ...

abstract different definitions have been proposed for soil quality. various soil properties have been suggetsted as soil quality indices by researchers. this research was conducted to study the relationship between slope of retention curve at its inflection point (s index) and other soil physical quality indices, because the reserches between s index and soil physical properties are little. thi...

Molecular weight distribution (MWD) and short chain branching (SCBD) play a decisive role in the performance of linear low-density polyethylene (LLDPE). A model based on non-standard polymerization reaction scheme is developed for ethylene/α-olefin gas phase copolymerization fluidized bed reactor. Experimental MWD SCBD are simultaneously deconvoluted. The results obtained by this simultaneous d...

Di metal cyanide (DMC) catalyzed living polymerization is characterized by a) the “catch-up” kinetics with a length dependent propagation rate constant k P ≈ n − 2 (n: chain length), favoring growth of small molecules and b) segmental caused repeated attachment detachment growing end to catalyst site. Whereas inverse square law reduces polydispersity, in segments increases it. Analytic expressi...

Bis(imino)phenoxide complexes of zirconium possess spectacular reactivity towards the solvent-free polymerization of cyclic ester monomers and lactides. Polymerization of lactide is living and the resulting product has exceptionally high number average molecular weights (Mn). Polymerization of β-butyrolactone gives syndiotactic poly(3-hydroxybutyrate) with good Mn and molecular weight distribut...

Objectives  Surgeons are now utilizing small incisions when performing thyroidectomy. This study evaluated the association between patient weight, nodule size, and maximum thyroid diameter and the length of an open thyroidectomy incision. Study Design  Retrospective analysis of 32 consecutive patients. Subjects and Methods  Patient demographics, clinical exam, ultrasound findings, operative fin...

This paper describes a method of building and maintaining a good set of triangle strips for both static and continuous level–of–detail (CLOD) meshes. For static meshes, the strips are better than those computed by the classic SGI and STRIPE algorithms. For CLOD meshes, the strips are maintained incrementally as the mesh topology changes. The incremental changes are fast and the number of strips...

(1) Background: The preservation of soil organic carbon (SOC) by aggregates (SA) is a key mechanism for the stability (C) pool. (2) Methods: Soil samples were collected at 0–20 cm depth from 75 sites across forest regions Greater Khingan Mountains, China, and fractionated as SA 0.25–2 mm, 0.053–0.25 <0.053 mm wet-sieving method. spatial patterns associated C (OC) investigated, well their ass...