03 - LIDSEN Publishing Inc.丨The Open Access Publisher

Volume 3,Issue 3

Open Access Review

Advances in Nanocarriers for Drug Delivery in Dental Therapies

Bhuamik Patel ,

Yeswanthi Kamineni ,

Shashank Gorityala and

M Hima Bindu

Received: 19 August 2021; Published: 28 September 2021; doi: 10.21926/rpm.2103039

Abstract

Dental caries are one of the major causes of oral degeneration diseases. In order to treat dental-related diseases, it is often challenging and expensive. Recent literature has reported many advances in designing delivery systems utilizing polymers and novel biomaterials. Polymers play an important role in designing many nanoformulations like liposomes, polymeric micelles, polymeric nanoparticles, carbon-based nanoparticles, nano-hydroxyapatite, iron oxide, zirconia, silica, and silv [...]

Open Access Research Article

Assessment of AAR and Sulfate Attack on Wadi Gravel Concrete after 4 Years in Service

Khaled Hassan ,

Ian Sims ,

Murray Reid ,

Alex Smith and

Mohammed Al-Kuwari

Received: 18 April 2021; Published: 26 September 2021; doi: 10.21926/rpm.2103038

Abstract

Wadi gravel is a local aggregate in Qatar that could contribute to enhanced sustainability by replacing expensive imported gabbro. The material needs to be processed before use to reduce sulfate content to acceptable levels. The paper presents the performance assessment of three full-scale buildings, variously made with 50% and 100% Wadi gravel and conventional gabbro concretes. Site monitoring up to four years in service demonstrated the strength development with age and resistance [...]

Open Access Original Research

Production of Fermentable Sugars from Cassava Stem using Hybrid Pretreatment Technology

Selvaraju Sivamani ,

Baskar Rajoo and

Lakshmi Balasubramanian

Received: 29 April 2021; Published: 14 September 2021; doi: 10.21926/rpm.2103037

Abstract

One of the crucial steps in the enzymatic hydrolysis of biomass is pretreatment. We investigated the applicability of a hybrid pretreatment method, This involved acid treatment followed by alkali before the production of fermentable sugars from cassava stem. The substrate was initially treated with acid (1% oxalic acid at 100 °C for 2 h), followed by treatment with a 10% NaOH–urea mixture (by mixing 5 g each of NaOH and urea in 100 mL of water) at 100 °C for [...]

Open Access Research Article

Phase Equilibrium in ZrO₂-CeO₂-Eu₂O₃ System at a Temperature of 1500 °C

O.A. Kornienko ,

S.V. Yushkevych ,

A.V. Sameljuk and

O.R. Andrievskaya

Received: 24 May 2021; Published: 02 September 2021; doi: 10.21926/rpm.2103036

Abstract

The phase equilibria and structural transformations in the ternary ZrO₂-CeO₂-Eu₂O₃ system at 1500 °C were studied by X-ray diffraction and scanning electron microscopy in the overall concentration range. The system was found to constitute fields of solid solutions based on the tetragonal (Т) modification of ZrО₂

Open Access Research Article

Utilization of Upgraded Recycled Concrete Aggregates and Recycled Concrete Fines in Cement Mortars

Athanasia Soultana ,

Michael Galetakis ,

Anthoula Vasiliou ,

Konstantinos Komnitsas and

Despina Vamvuka

Received: 11 February 2021; Published: 17 August 2021; doi: 10.21926/rpm.2103035

Abstract

Waste concrete is the most predominant constituent material among construction and demolition waste. Current waste concrete recycling is limited to the use of recycled concrete aggregates as a road-base material and less as aggregates in new concrete mixes. Further, the production of recycled concrete aggregates results in the generation of a high amount of fines, consisting mainly of cement paste particles. Hence, this study aims to produce the cement mortars using the upgraded recy [...]

Open Access Original Research

Bisphenol A Release from Orthodontic Clear Aligners: An In-Vitro Study

Sydney Katras ,

Dejian Ma ,

Ayman al Dayeh and

David Tipton

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

Abstract

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 th [...]

Open Access Original Research

Effect of Recycled Rubber Particles on the Deicing Salt-Scaling Durability of Concrete

layachi Guelmine and

Hadda Hadjab

Received: 27 March 2021; Published: 09 August 2021; doi: 10.21926/rpm.2103033

Abstract

The present study investigated the effect of reused rubber particles (RRP) on the deicer salt durability of ordinary concrete. Four mixtures were designed, a control concrete (CC) and three other rubber concretes obtained by partial substitution of natural dune sand aggregate with reused rubber particles with 0%, 3%, 6%, and 9% w/w. All studied concretes were subjected to the combined effect of freeze/thaw (56 and 120) cycles with the deicer salt solution of 3% NaCl. The results indi [...]

Open Access Original Research

Experimental and Statistical Evaluation of the Interaction Effect of Recycled Aggregate and Water/Cement Ratio on Concrete Compressive Strength

Mônica Batista Leite and

Paulo Roberto Lopes Lima

Received: 07 March 2021; Published: 28 July 2021; doi: 10.21926/rpm.2103032

Abstract

The production of concrete using recycled aggregates, obtained from the processing of construction and demolition waste, is extensively practiced worldwide. However, the effect of simultaneous adding fine recycled aggregate and the recycled coarse aggregate on the mechanical properties of concrete is still unfamiliar. This work aims to evaluate the influence of the water/cement ratio (WC Ratio), the fine recycled aggregate content (%FRA), the coarse recycled aggregate content (%CRA), [...]

Open Access Original Research

Influence of Biopolymers on the Mechanical Behavior of Earth-Based Building Materials

Julia Tourtelot ,

Ann Bourgès and

Emmanuel Keita

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

Abstract

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 co [...]

Open Access Original Research

Assisted Phytostabilization of Acidic Polymetallic Mine Tailings Using Marble Waste and Native Plant Citrullus colocynthis: Effect on Soil, Plant, and Metal Uptake

Laila Midhat ,

Naaila Ouazzani ,

Abdessamed Hejjaj ,

Ahmed Ouhammou and

Laila Mandi

Received: 29 December 2020; Published: 22 July 2021; doi: 10.21926/rpm.2103030

Abstract

This study aimed to assess the effectiveness of the phytostabilization ability of the native Moroccan plant Citrullus colocynthis on the neutralization of soil acidity and stabilization of metallic trace elements (MTEs) assisted by marble waste. Mine tailings (MT) collected from an abandoned polymetallic site were mixed with powdered marble (PM) using different mixing ratios (%): (MTPM₂₅), (MTPM₅₀), (MTPM_{75 [...]}

Open Access Research Article

Drainage in a Screw Press and Utilization of the Recovered Fibres after Thermo-Hydrolytic Disintegration of Waste Fibreboards

Fahriye Yagmur Bütün Buschalsky and

Carsten Mai

Received: 15 March 2021; Published: 22 July 2021; doi: 10.21926/rpm.2103029

Abstract

A thermo-hydrolytic disintegration process qualifies as a promising option for recycling the waste MDF and preserving the fibrous morphology of the recovered lignocellulosic fibre material. This study aims to include a drainage process between the thermo-hydrolytic disintegration and the further utilization of the recovered fibres (RF) obtained using a screw press for removing the disintegration water (DW). In this context, the chemical properties of the RF (pH, nitrogen content, for [...]

Open Access Original Research

Suitability of Steel Making Slag as a Construction Material Resource

Lucy V. Fisher and

Andrew R. Barron

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

Abstract

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 fluorescenc [...]

Table of Contents