by Amir Mahboob  , Omid Hassanshahi  , Abdulqaiyoum Hakimi  and Mohammad Safi

Received: 02 March 2023;  Published: 19 April 2023;  doi: 10.21926/rpm.2302016

The largest proportion of the material used in multistory buildings, and thus its carbon impact, is attributed to their slabs being the main contributor of weight. Because of their high strength and concrete self-weight reduction, composite beams with hollow-core slabs were created for their technical and economic benefits, making this system inexpensive and with a reduced environmental impact, thereby lowering carbon emissions. Geometrically, the hollow slab has a sequence of T and L form pieces on both sides. Hol [...]

by Yusuf Sani  , Raba’ah Syahidah Azis  , Ismayadi Ismail  , Yazid Yaakob  , Chen Soo Kien  , Mohd Mustafa Awang Kechik  and Lim Kean Pah

Received: 11 October 2024;  Published: 26 January 2025;  doi: 10.21926/rpm.2501003

The widespread usage of various wireless equipment in many facets of life has significantly contributed to the severe pollution caused by electromagnetic radiation. Thankfully, scientists have created materials that can absorb microwave radiation and convert dangerous electromagnetic waves into other forms of energy, including heat energy. Many recent investigations have been published regarding developing materials that absorb microwaves with different constituents, morphologies, and architectures. Microwave-absor [...]

by Alhayat Getu Temesgen  , Ömer Fırat Turşucular  and Elif Dicle Turşucular

Received: 12 December 2023;  Published: 15 March 2024;  doi: 10.21926/rpm.2401008

This mini-compilation study included the chemical structure, mechanical, thermal, and dimensional properties of silk fiber, its production process, pre-treatment, and biomedical applications from various experimental studies, which are compiled and summarized. The silk fiber should have a degumming process before using biomedical applications. The 25% concentration for Na2CO3 in ethanol solution (80%) as a coagulant chemical with a salt such as LiB2 (9 M) at a temperature of 98°C for 45 minutes at pH between 6 [...]

by Sydney Katras  , Dejian Ma  , Ayman al Dayeh  and David Tipton

Received: 31 March 2021;  Published: 12 August 2021;  doi: 10.21926/rpm.2103034

Bisphenol A (BPA) is a widely used synthetic compound that has been identified as an endocrine disruptor. It has been linked to adverse health effects such as developmental defects, infertility in both men and women, cardiovascular disease, and obesity. There has been increased interest in BPA’s effects on the developing fetus and data has revealed that doses below the presumed safe dose can produce harmful effects. Orthodontic clear aligner therapy is a popular treatment modality that involves the patient we [...]

by Ki-Won Jeong  , Jeong Chan Kim  and In-Sung Luke Yeo

Received: 13 August 2020;  Published: 17 December 2020;  doi: 10.21926/rpm.2004024

A connection structure using both a screw and friction is advantageous to secure an abutment to an implant. Understanding the biomechanics of the implant-abutment connection is necessary for the long-term clinical survival of a dental implant with decreased complications. The internal conical friction connection structure and micro-threads have shown favorable biological hard tissue response with exceptional structural features. The internal conical connection structure maintains the soft tissue seal and the margin [...]

by Kuok Ho Daniel Tang

Received: 28 February 2025;  Published: 28 July 2025;  doi: 10.21926/rpm.2503011

Plastic pollution has received worldwide attention due to its extensive environmental and health implications. The circular economy has emerged as a potential solution to plastic pollution. This overview comprehensively presents different plastic circular economy approaches and discusses their advantages, disadvantages, and implementation challenges. It highlights that the current plastic circular economy approaches primarily comprise mechanical recycling, chemical recycling, bio-based and biodegradable plastics, e [...]

by Carlos A. Echeverry-Gonzalez  and Vladimir V. Kouznetsov

Received: 01 December 2020;  Published: 28 April 2021;  doi: 10.21926/rpm.2102015

The design of nanomaterials for application in diverse fields ranging from photovoltaic to fluorescence sensing is a research area of increasing interest. Recently, Quantum Dots (QDs), which are classified as semiconductor quantum dots (SQDs) and Carbon dots (CDs), have become a hot topic of investigation, owing to their extraordinary tunable fluorescence emission properties that render them excellent candidates for sensing metal ions. The detection of metal ions in aqueous solutions with high sensitivity is very i [...]

by Ben Milborne  , Abul Arafat  , Rob Layfield  , Alexander Thompson  and Ifty Ahmed

Received: 18 March 2020;  Published: 12 May 2020;  doi: 10.21926/rpm.2002012

Radiotherapy has become one of the most prominent and effective modalities for cancer treatment and care. Ionising radiation, delivered either from external or internal sources, can be targeted to cancerous cells causing damage to DNA that can induce apoptosis. External beam radiotherapy delivers either photon radiation (x-rays or gamma rays) or particle radiation (neutrons or protons) in a targeted manner to specific tumour locations. Internal radiotherapy involves placing radioactive sources within the body to de [...]

by Taofiq O. Mohammed  , Mohammad Zunaied Bin Harun  , Jian Liu  and Ebenezer O. Fanijo

Received: 04 June 2025;  Published: 04 September 2025;  doi: 10.21926/rpm.2503013

The high carbon footprint of cement production and the cost and environmental impact of steel reinforcement make conventional concrete unsustainable for long-term use. Reducing cement consumption and identifying sustainable, cost-effective alternatives to steel are critical for lowering construction’s ecological and economic burden. Bio-based supplementary cementitious materials (SCMs), such as rice husk ash (RHA), and natural plant fibers show promise, but prior studies have mostly tested them separately or with v [...]

by Alexander Henn  and Maija-Liisa Mattinen

Received: 08 March 2019;  Published: 26 April 2019;  doi: 10.21926/rpm.1902001

Technical lignins from the biorefinery, pulp, and paper industries are largely underutilized, even though this aromatic and randomly structured biopolymer could be an interesting raw material for advanced applications in addition to bulk daily goods. Recently, colloidal lignin particles (CLPs) have gained much of the research interests due to the attractive multi-functional properties of the biopolymer. Utilization of lignin in nanoparticulate morphology resolves most of the drawbacks when using lignin (heterogenei [...]

by Erik B Karlsson

Received: 29 December 2019;  Published: 13 April 2020;  doi: 10.21926/rpm.2002009

Decoherence is a relatively recent concept in the field of quantum mechanics. Although the pioneers of the field must have understood that loss of phase coherence in quantum superpositions is the reason underlying the appearance of definite outcomes in the quantum measurement problem, the latter was not treated in terms of decoherence until sixty years after the formulation of quantum mechanics as described in a report by Joos and Zeh in 1983 [1]. However, soon after, the theory was developed in further detail, and [...]

by Ryan L Dimmock  , Xuyiling Wang  , Yibin Fu  , Alicia J El Haj  and Ying Yang

Received: 09 December 2019;  Published: 28 February 2020;  doi: 10.21926/rpm.2001005

Advancements in surface engineering and material fabrication techniques have enabled the creation and replication of naturally occurring surface topographies or the extrapolation of natural patterns to become achievable targets. Polymers are used extensively in the field of biomedical sciences for containment, handling, and as cell culture substrates. It is well established that several polymers exhibit good biocompatibility for cell culture, with properties that include exhibiting minimal to no cytotoxicity and be [...]

by Suhail Hyder Vattathurvalappil  , Syed Fahad Hassan  and Mahmoodul Haq

Received: 24 January 2023;  Published: 16 March 2023;  doi: 10.21926/rpm.2301012

Thermoplastics polymers like Acrylonitrile Butadiene Styrene (ABS) are often reinforced with nano/micro reinforcements to enhance their mechanical, thermal and electrical properties. However, the viscoelastic nature of these polymers results in their strong dependence on the applied strain rate and temperature sensitivity, leading to their characterization complexity. Hence it is paramount to study the strain rate-dependent mechanics of neat ABS. In this study, the effect of strain rate and temperature on Young’s m [...]

by Herinjaka Haga Ratsimbazafy  , Aurélie Laborel-Préneron  , Camille Magniont  and Philippe Evon

Received: 26 March 2021;  Published: 20 June 2021;  doi: 10.21926/rpm.2102026

The use of plant aggregates obtained from agricultural co-products mixed with mineral binders to form eco-friendly insulating building materials has been initiated for a few years to bring environmentally friendly solutions to the construction sector. Several studies on different agro-resources have already been carried out, providing various information about the properties of plant aggregates and plant-based concrete. However, the characteristics of the agricultural co-product, which allow it to qualify as a plan [...]

by Roland Pässler

Received: 17 June 2021;  Published: 22 November 2021;  doi: 10.21926/rpm.2104042

The well-known classical heat capacity model developed by Debye proposed an approximate description of the temperature-dependence of heat capacities of solids in terms of a characteristic integral, the T-dependent values of which are parameterized by the Debye temperature, ΘD. However, numerous tests of this simple model have shown that within Debye's original supposition of approximately constant, material-specific Debye temperature, it has little chance to be applicable to a larger variety of non-metals, e [...]

by Paola Stabile  , Francesco Radica  , Luigi Ranza  , Michael R. Carroll  , Carlo Santulli  and Eleonora Paris

Received: 12 December 2020;  Published: 02 March 2021;  doi: 10.21926/rpm.2101006

In this work, two types of wastes were introduced, namely, glass from municipal waste and Construction and Demolition Waste (CDW). The latter, which was obtained from rubble generated by the seismic events occurred in Central Italy in 2016, was introduced in two configurations, the single-layer and the double-layer of the cement-based Terrazzo tiles. A maximum of 77% of waste introduction was proven to be possible, therefore creating the possibility of obtaining construction products including high quantities of se [...]

by Lucy V. Fisher  and Andrew R. Barron

Received: 24 February 2021;  Published: 16 July 2021;  doi: 10.21926/rpm.2103028

One of the largest problems facing the steelmaking industry is the high amount of waste currently produced and the low amount of waste that is currently recycled. This study aims to look at the suitability of 3 different samples of basic oxygen steelmaking (BOS) slag as a construction material, in concert with their carbon capture capacity. Characterization by scanning electron microscopy (SEM), X-ray diffraction (XRD), inductively coupled plasma spectroscopy (ICP), X-ray fluorescence (XRF), CO2 adsorption analysis [...]

by Dimitrios Dionysopoulos  , Olga Gerasimidou  and Constantinos Papadopoulos

Received: 01 May 2022;  Published: 01 June 2022;  doi: 10.21926/rpm.2202011

Glass ionomer cements (GICs) are dental materials that were invented by Wilson & Kent in 1972. They can chemically bond to enamel and dentin and can exhibit anti-cariogenic activity that allows the release and uptake of fluoride ions. They also possess the ability to render color. The setting reaction of GICs is a neutralization reaction that results in the formation of polycarboxylate salts. The most important GIC modification process involves the addition of resin components, resulting in the development of resin [...]

by Obumneme Emmanuel Ezeani  , Christopher Igwe Idumah  , Ifeanyi Emmanuel Okoye  and Chioma Joan Ikebudu

Received: 13 January 2025;  Published: 27 May 2025;  doi: 10.21926/rpm.2502009

Nanotechnology has revolutionized the textile industry by introducing innovative finishing techniques that enhance the durability and performance of textile materials and the application of nanoscale/nanoparticles/nanomaterials and processes to improve the properties and performance of textiles. The synergism of textile technology and nanotechnological advancements has propelled a paradigm shift, changed the narrative, and formed novel platforms for textile surface engineering at both atomically affiliated and mole [...]

by Aadharshini Ganesh  , Nisha Gupta  , Prosenjit Saha  and Pallab Bhattacharya

Received: 31 January 2023;  Published: 08 May 2023;  doi: 10.21926/rpm.2302020

Energy storage devices (ESD) including batteries, and supercapacitors are becoming progressively imperative in the transition to a renewable energy future, as they enable the integration of intermittent renewable sources into the grid and provide backup power during outages. There are already reviews available on various energy storage materials and systems. However, the challenges in the choice of suitable materials and fabrication technology are yet to establish for the commercialization of affordable and efficie [...]

by Emma G. Norris  , Diane Dalecki  and Denise C. Hocking

Received: 22 March 2020;  Published: 21 July 2020;  doi: 10.21926/rpm.2003018

Ultrasound is emerging as a promising tool for both characterizing and fabricating engineered biomaterials. Ultrasound-based technologies offer a diverse toolbox with outstanding capacity for optimization and customization within a variety of therapeutic contexts, including improved extracellular matrix-based materials for regenerative medicine applications. Non-invasive ultrasound fabrication tools include the use of thermal and mechanical effects of acoustic waves to modify the structure and function of extracell [...]

by Naiwei Chi  , Shuyao Zheng  , Elwin Clutter  and Rong Wang

Received: 30 October 2019;  Published: 18 December 2019;  doi: 10.21926/rpm.1904007

Background:Diabetic patients suffer from chronic wounds partly due to altered function of fibroblasts. Fibroblasts of diabetic patients synthesize collagen I (COLI) at a much higher level than collagen III (COLIII), resulting in delayed tissue granulation and, consequently, a delay in the overall wound healing process. Methods:We aimed to revive the matrix protein productivity of diabetic fibroblasts by employing aligned, electrically conductive and biocompatible spider silk-CNT fibers as a cell culture matrix to m [...]

by Julia Tourtelot  , Ann Bourgès  and Emmanuel Keita

Received: 09 March 2021;  Published: 26 July 2021;  doi: 10.21926/rpm.2103031

Currently, the largest among the earth excavation sites in Europe are located in the Paris region. The soils excavated from these sites are often considered waste and are not valorized. With an increasing focus on sustainable development, the demand for low-carbon building materials is rising. Although construction using raw earth is a vernacular technique, the diversity in the behavior of the raw earth building materials warrants better control of their mechanical properties. The construction techniques differ dep [...]

by Zhong Hu  and Haiping Hong

Received: 21 March 2023;  Published: 16 August 2023;  doi: 10.21926/rpm.2303031

The chemically functionalized carbon nanotubes (f-CNTs) and hydrogen bonding modified polymer composites (CPCs) exhibit unique chemical, mechanical, electrical, and thermal properties and are emerging as promising materials to achieve extraordinarily high electrical and thermal conductivity, lightweight and anticorrosion, superior strength and stiffness for potential applications in the aerospace and automotive industries, energy conversion, and optical and electronic devices, therefore, attracting considerable res [...]

by Ju dong Lee  , Jinho Kim  and Seungjoo Lee

Received: 29 September 2022;  Published: 16 January 2023;  doi: 10.21926/rpm.2301007

Most spent coffee grounds (SCGs), a byproduct of brewing coffee, are buried in landfill sites, and their decomposition produces significant greenhouse gases. As the recent warming of the Earth’s climate has made it imperative that industries reduce greenhouse gas emissions, the present study investigates the viability of recycling SCGs for use as a partial replacement of aggregates in concrete materials. Cement mortar samples with a fixed cement-to-water ratio and varying amounts of SCGs were fabricated and tested. [...]