by Diego Alves de Moro Martins  , João Rodrigo Andrade  , Carlos Antonio Ribeiro Duarte  , Ricardo de Vasconcelos Salvo  and Francisco José de Souza

Received: 31 January 2022;  Published: 06 May 2022;  doi: 10.21926/jept.2202017

Cyclone separators are widely used in fluid catalytic cracking (FCC) units due to their lack of moving parts and relatively low-pressure drop. However, cyclone separators are prone to erosion-related issues, which is a major drawback. In this paper, a large eddy simulation (LES) of the particle-gas flow in a cyclone separator is investigated using a four-way Euler-Lagrange approach to model inter-particle collisions and the exchange of momentum between particles and fluid. The effects of inter-particle and particle [...]

by Alison Knoblauch  and Paul Dargusch

Received: 24 January 2022;  Published: 05 May 2022;  doi: 10.21926/aeer.2202018

The earth’s climate is warming, increasingly straining the Earth’s human and environmental systems. Organisations are increasingly committing to net zero emissions by mid-Century to set and communicate their ambition to limit global warming to the peak temperature goals of the Paris Agreement. However, for many companies, the pathway to delivering against this ambition remains unclear – and significant investment in technical, social and economic systems required before this target becomes a reality. This paper ana [...]

by Sai Vamsi Krishna Vissa  and Mileva Radonjic

Received: 21 March 2022;  Published: 29 April 2022;  doi: 10.21926/aeer.2202017

Oil and gas wellbores that are drilled into the earth’s crust need to be plugged and abandoned, to restore the geological seals once they are no longer producing. The main aim of Plugging and abandonment (P&A) is to ensure that there is no leakage of hydrocarbons into the environment. Since offshore P&A is challenging due to subsurface temperature and pressure conditions, testing zeolite as an additive for improvement of cement properties is an intriguing research topic. This initial research aims to [...]

by Trenton Cersoli  , Muneer Barnawi  , Kerry Johnson  , Edward Burden  , Frank Li  , Eric MacDonald  and Pedro Cortes

Received: 17 February 2022;  Published: 29 April 2022;  doi: 10.21926/rpm.2202009

Shape memory polymers (SMPs) are smart materials that can respond to certain thermal, chemical or electrical stimuli by inducing a structural conformation change into a temporary shape. In this work, a 3D printing process based on a Vat Photo-polymerization of a shape memory polymer (SMP) was investigated to produce customized smart and complex morphable antennas. The mechanical and material properties were examined through a tensile, flexural and rheological testing for different polymer mixture ratios. It was obs [...]

by Felipe Jimenez Pastrana  , Paul Dargusch  and Genia Hill

Received: 09 February 2022;  Published: 27 April 2022;  doi: 10.21926/aeer.2202016

The private sector plays an important role in the global climate goals and the 1.5°C target set during the Paris Agreement. Through investment in green projects and technology and energy efficiency initiatives, their carbon management strategy is paramount to achieve sustainability and good business practices. It is crucial to understand the proposals that the industry has established to reduce its environmental impact by applying supply chain optimization and technological advances or by participating in th [...]

by Shangkun Deng  , Yini Lei  , Yiyu Deng  , Yilan Lai  and Xingyuan Gao

Received: 29 January 2022;  Published: 26 April 2022;  doi: 10.21926/cr.2202012

The use of the dry reforming of methane (DRM) to convert the two principal greenhouse gases, methane and carbon dioxide, to syngas (a mixture of H2 and CO) has attracted increasing attention in recent years. However, the DRM reaction suffers from the twin disadvantages of carbon deposition and sintering, so a highly efficient and robust catalyst with superior anti-deactivation properties is required. One way to meet this need is to incorporate active metals into crystalline oxides, such as perovskite. In this paper [...]

by Yuyun Wang  , Paul Dargusch  and Genia Hill

Received: 10 January 2022;  Published: 26 April 2022;  doi: 10.21926/aeer.2202015

Carbon emissions are a major factor influencing climate change. Climate change also has ecological impacts, such as loss of biodiversity and loss of ecosystem functions and services. Starbucks is a large multinational company which aims to reduce their environmental impact. Starbucks’ carbon emissions in 2018 were 16,706 thousand metric tons, including 320 thousand metric tons of direct scope 1 emissions, 1,094 thousand metric tons of indirect scope 2 emissions and 14198 thousand metric tons of indirect scope 3 emi [...]

by Lynne Uhl  , Taye H. Hamza  , Terry Gernsheimer  and Sherrill J. Slichter

Received: 30 December 2021;  Published: 26 April 2022;  doi: 10.21926/obm.transplant.2202158

In the multi-institutional platelet dose trial (PLADO Trial), there were 1,077 hematology/oncology patients ≥18 years of age who received at least one platelet transfusion. These patients were analyzed for types and severity of organ system bleeding based on baseline patient characteristics, laboratory assays, primary diagnosis, and type of treatment. Patients were randomly assigned to receive one of three different prophylactic platelet doses for morning platelet counts of ≤10 × 109 /L. Daily assessmen [...]

by Florence Naillat

Received: 25 August 2021;  Published: 26 April 2022;  doi: 10.21926/obm.genet.2202153

In the last four decades, transgenic and knockout mouse models have helped to understand the mechanisms of mammalian sex determination, germ cell development, and adult gonad functions. We have gained crucial insights into molecular factors and pathways of the cells generating either the supporting gonadal cells or germ cells of both sexes. In this review, we highlighted some of the main gene networks and regulatory mechanisms involved in the plasticity of sex-determining pathways that help to establish a functiona [...]

by Bernard R. Baum  and Douglas A. Johnson

Received: 07 January 2022;  Published: 24 April 2022;  doi: 10.21926/obm.genet.2202152

We have investigated the utility of the 5S nrDNA, a conserved, multicopy gene family organized into tandem repeats as a tool for genetic analyses in a wide variety of genera. Previous work in the Triticeae (Poaceae) demonstrated that the prior identification of unit classes based upon the 5S nrDNA NTS, greatly facilitates analysis. We investigated the potential of defining unit classes in other plant genera and several animal genera as a step towards future phylogenetic analyses. Our results demonstrate that in in [...]