25 papers · ranked by Valyu relevance
Zhipeng Li, Yong Long, Il Yong Chun
Purpose: Dual-energy computed tomography (DECT) has been widely used in many applications that need material decomposition. Image-domain methods directly decompose material images from high- and low-energy attenuation images, and thus, are susceptible to noise and artifacts on attenuation images. The purpose of this…
Tyler E. Curtis, Ryan K. Roeder
Mammographic screening for breast cancer is unable to distinguish molecular differences between hydroxyapatite (HA) microcalcifications (μcals) that are associated with malignancy and calcium oxalate (CaOx) μcals that are benign. Therefore, the objective of this study was to investigate quantitative material…
Costas Tsioptsias, Andrea Sorrentino
Although thermosets and various biopolymers cannot be softened without being decomposed, the vast majority of thermoplastics are believed to exhibit thermal transitions solely related to physical alterations of their structure-a behavior typical of low molecular weight substances. In this study, Differential Scanning…
Nejla B. Erdal, Minna Hakkarainen
Man-Made, and Natural Environments Authors: Nejla B. Erdal, Minna Hakkarainen Biodegradable polymers complement recyclable materials in battling plastic waste because some products are difficult to recycle and some will end up in the environment either because of their application or due to wear of the products.…
Noémie A. Pichon, Seraina Cappelli, Santiago Soliveres, Norbert Hölzel + 3 more
Nitrogen (N) enrichment has direct effects on ecosystem functioning by altering soil abiotic conditions and indirect effects by reducing plant diversity and shifting plant functional composition from dominance by slow to fast growing species. Litter decomposition is a key ecosystem function and is affected by N…
Michał Puchalski, Grzegorz Szparaga, Tadeusz Biela, Agnieszka Gutowska + 2 more
'Agnieszka Gutowska' 'Sławomir Sztajnowski' 'Izabella Krucińska'] In this paper, the influence of the various degradation conditions, on the molecular and supramolecular structure of polybutylene succinate (PBS) and polybutylene succinate adipate (PBSA) copolymer during degradation is described. The experiment was…
Sarah Schwieger, Ellen Dorrepaal, Matteo Petit Bon, Vigdis Vandvik + 38 more
Empirical studies worldwide show substantial variability in plant litter decomposition responses to warming, leaving the overall impact of climate change on this process uncertain. We conducted a meta-analysis of 109 experimental warming studies across seven continents, utilizing natural and standardized plant…
Ruth-Sarah Rose, Katherine H. Richardson, Elmeri Johannes Latvanen, China A. Hanson + 1 more
The environmental accumulation of plastics worldwide is a consequence of the durability of the material. Alternative polymers, marketed as biodegradable, present a potential solution to mitigate their ecological damage. However, understanding of biodegradability has been hindered by a lack of reproducible testing…
Qingzhao Chu, Xiaoya Chang, Kang Ma, Xiaolong Fu + 1 more
A neural network potential (NNP) is developed to investigate the complex reaction dynamics of RDX thermal decomposition. Our NNP model is proven to possess good computational efficiency and retain the ab initio accuracy, which allows the investigation of the entire decomposition process of bulk RDX crystal from an…
Borah, Preetom, Senyurt, Elif Irem + 8 more
The development of advanced diagnostic systems to measure and optimize emerging energetic material performance is critical for the defeat of Chemical Warfare Agents (CWAs). This study presents an integrated multi-spectroscopic approach to monitor the interaction between a CWA simulant, Diisopropyl Methyl Phosphonate…
Sytske M. Drost, Annemieke van der Wal, Wietse de Boer, Paul. L.E. Bodelier
Fungi play an important role in carbon - and nutrient cycling. It is, however, unclear if diversity of fungi is essential to fulfill this role. With this meta-analysis, we aim to understand the relationship between fungal diversity and decomposition of plant materials (leaf litter and wood) in terrestrial and aquatic…
Jonas Rein, Jonathan M. Meinhardt, Julie L. Hofstra Wahlman, Matthew S. Sigman + 1 more
Accurate prediction of the sensitivity properties of high-energy materials (HEMs) and the study of their decomposition mechanisms are two major focuses within energetics research. Due to the hazards associated with the synthesis and handling of energetic materials, predictive models for HEM sensitivity are of great…
Glen R. Jones, Richard Whitfield, Hyun Suk Wang, Nethmi De Alwis Watuthanthrige + 3 more
Non-Thermal External Stimuli for Polymer Recycling Authors: ['Glen R. Jones' 'Richard Whitfield' 'Hyun Suk Wang' 'Nethmi De Alwis Watuthanthrige' 'Maria-Nefeli Antonopoulou' 'Victoria Lohmann' 'Athina Anastasaki'] Polymeric materials have become indispensable due to their versatility and low cost, yet their…
Sohag Biswas, Bryan Wong
The enhanced degradation of organophosphorous-based chemical warfare agents (CWAs) on metal-oxide surfaces holds immense promise for neutralization efforts; however, the underlying mechanisms in this process remain poorly understood. We utilize large-scale quantum calculations for the first time to probe the…
Anibal Bher, Pooja C. Mayekar, Rafael A. Auras, Carlos E. Schvezov + 1 more
'Jordi Puiggalí'] Finding alternatives to diminish plastic pollution has become one of the main challenges of modern life. A few alternatives have gained potential for a shift toward a more circular and sustainable relationship with plastics. Biodegradable polymers derived from bio- and fossil-based sources have…
Tarannom Parhizkar, Theresa Stewart, Lixian Huang, Ali Mosleh
A cyber physical human complex system failure prevents the accomplishment of the system's intended function. The failure of a complex system could be a breakdown of any system hardware, human related factors, application software, or the interaction between these components. Having knowledge about all these three…
Ikumi Kobayashi, Shin-ichi Sasa
We present a simple model describing the assembly and disassembly of heteropolymers consisting of two types of monomers A and B. We prove that no matter how we manipulate the concentrations of A and B, it takes longer than the exponential function of d to synthesize a fixed amount of the desired heteropolymer, where d…
Karl Rönnby, Henrik Pedersen, Lars Ojamäe
Kinetic modeling has been used to study the decomposition chemistry of ammonia at a wide range of temperatures, pressures, concentrations, and carrier gases mimicking the conditions in chemical vapor deposition (CVD) of metal nitrides. The modeling show that only a small fraction of the ammonia molecules will decompose…
Egheosa Ogbomo, Fakhrul H. Bhuiyan, Carlos Ayestaran Latorre, Ashlie Martini + 1 more
The growth of protective tribofilms from lubricant antiwear additives on rubbing surfaces is initiated by mechanochemical decomposition reactions. These processes are not well understood at the molecular scale for many important additives, such as tricresyl phosphate (TCP). One aspect that needs further clarification…
Kristina G. Gasparyan, Polina M. Tyubaeva, Ivetta A. Varyan, Alexandre A. Vetcher + 2 more
'Alexandre A. Vetcher' 'Anatoly A. Popov' 'Cornelia Vasile'] Due to the current environmental situation, biopolymers are replacing the usual synthetic polymers, and special attention is being paid to poly-3-hydroxybutyrate (PHB), which is a biodegradable polymer of natural origin. In this paper, the rate of…
Armando Costa Ferreira, Haroldo Jorge da Silva Ribeiro, Douglas Alberto Rocha de Castro, Marcelo Costa Santos + 6 more
This study examines the chemical recycling of polymethylmethacrylate (PMMA) dental waste in semi-batch fixed-bed reactors via pyrolysis, aiming to convert this waste into the valuable monomer methyl methacrylate (MMA). First, the effect of temperature is analyzed in a laboratory-scale (30 g) semi-batch reactor at 350…
Authors not listed
We introduce trioxanes as a new motif for on-demand photolysis of 3D printed polymer networks via an orthogonal light source using photoacid generators (PAGs). The acid-induced degradation of otherwise very stable trioxanes in combination with the versatility of generating trioxane-containing monomers makes the motif…
B. Banerjee
Most research on the simulation of deformation and failure of metals has been and continues to be performed using the finite element method. However, the issues of mesh entanglement under large deformation, considerable complexity in handling contact, and difficulties encountered while solving large deformation…
Silvia Kliem, Marc Kreutzbruck, Christian Bonten
Biodegradable plastics can make an important contribution to the struggle against increasing environmental pollution through plastics. However, biodegradability is a material property that is influenced by many factors. This review provides an overview of the main environmental conditions in which biodegradation takes…
Congcong Xu, Maruti Kumar Mudunuru, K. B. Nakshatrala
This figure shows a good agreement between the experimental data and the proposed constitutive model for the diffusivity under tension, compression and shear. Analysis is performed for various extracted sample sizes, and the coefficient of determination is found to be close to 1. This calibration study provides…