Tetti Novalina Manik^1,2,*, Sulung Apria Nuki², Nur Aini Fauziyah¹, Mashuri¹, Mochamad Zainuri¹, Darminto^1,*

Journal of Renewable Materials, Vol.9, No.9, pp. 1647-1660, 2021, DOI:10.32604/jrm.2021.016089

Abstract The performance of oil palm trunk wastes from Banjarbaru of South Kalimantan was improved with the help of chemical modification in a two-step treatment. The first was formalization with formaldehyde solution with varying pH, and the second was impregnation with melamine-formaldehyde resin under 5 bar pressure for an hour. In these processes, the samples were cured at 120°C for 10 min and then dried in an oven at (103 ± 2)°C in order to attain a moisture content of less than 6%. These treatments improved the physical properties (density, moisture content, and volume swelling), mechanical resistance, dynamic-mechanical and acoustic performance… More > Graphic Abstract

Xing Li^1,3, Yugo Osaka^2,*, Hongyu Huang¹, Takuya Tsujiguchi², Akio Kodama²

Journal of Renewable Materials, Vol.9, No.9, pp. 1541-1553, 2021, DOI:10.32604/jrm.2021.015514

Abstract Sulfur dioxide (SO₂) emissions from diesel exhaust pose a serious threat to the environment and human health. Thus, desulfurization technology and the performance of desulfurization materials must be improved. In this study, MnO₂ was modified with various alkali metal ions using the impregnation method to enhance its SO₂ capture performance. The composites were characterized intensively by scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction spectroscopy, and Brunauer-Emmett-Teller theory. The SO₂ capture performance of these composites were measured via thermogravimetry, and the effect of doping with alkali metal ions on the SO₂ capture performance of MnO₂ was investigated. Results showed that… More >

Mayyadah H. Mohsin¹, Najwan H. Numan², Evan T. Salim^1,*, Makram A. Fakhri^2,*

Journal of Renewable Materials, Vol.9, No.9, pp. 1519-1530, 2021, DOI:10.32604/jrm.2021.015465

Abstract A SiC nanofilms have been deposited and investigated on quartz and silicon substrates using pulsed laser deposition technique with the 300 pulses of Nd: YAG laser at two different laser wavelengths of 1064 nm and 532 nm. The structural, morphological, and optical properties of the deposited nanostructure SiC were prepared and characterized as a function of the wavelengths of the used laser. The structural result shows four different pecks at (111), (200), (220), and (311) planes related to Nano SiC. The transmission result presents that the optical energy gap value for the SiC nanostructure is depended on the wavelength of… More > Graphic Abstract

Jun Li^1,2,3, Tao Zeng^1,2,3,*, Noriyuki Kobayashi⁴, Rongjun Wu⁴, Haotai Xu⁴, Lisheng Deng^1,2,3, Zhaohong He^1,2,3, Hongyu Huang^1,2,3,*

Journal of Renewable Materials, Vol.9, No.9, pp. 1621-2630, 2021, DOI:10.32604/jrm.2021.015231

Abstract In order to apply lithium hydroxide (LiOH) as a low temperature chemical heat storage material, the carbonation reaction of LiOH and the prevention method are focused in this research. The carbonation of raw LiOH at storage and hydration condition is experimentally investigated. The results show that the carbonation reaction of LiOH with carbon dioxide (CO₂) is confirmed during the hydration reaction. The carbonation of LiOH can be easily carried out with CO₂ at room temperature and humidity. LiOH can be carbonated at a humidity range of 10% to 20%, a normal humidity region that air can easily be reached. Furthermore,… More >

Yehan Xu, Zhifu Dong, Chong Jia, Zhiqiang Wang^*, Xiaoning Lu^*

Journal of Renewable Materials, Vol.9, No.9, pp. 1609-1620, 2021, DOI:10.32604/jrm.2021.015193

Abstract

Nail connection is widely used in engineering and construction fields. In this study, bamboo nail was proposed as a novel connector for timber assemblies. Penetration depth of bamboo nail into wood was predicted and tested. The influence of nail parameters (length, radius and ogive radius) on penetration depth were verified. For both tested and predicted results, the penetration depth of bamboo nail increased with the increasing length, radius or ogive radius. In addition, the effect of densification on penetration depth or mechanical properties was evaluated. 1.12 g/cm³ was a critical density when densification was needed, and further increment of density… More >

Suiyi Zhu¹, Manhong Ji¹, Hongbin Yu^1,*, Zhan Qu¹, Jiakuan Yang², Mingxin Huo¹, Yi Wang¹

Journal of Renewable Materials, Vol.9, No.9, pp. 1599-1607, 2021, DOI:10.32604/jrm.2021.015189

Abstract

Herein, we reported a method to prepare magnetic sodalite sphere by using the mud from backwash wastewater after polyaluminum chloride (PAC) coagulation. The results showed that approximately 100% of Fe in the wastewater was precipitated as flocculent iron mud (FM) by adding PAC. FM was converted to spherical magnetic sodalite (FMP) with a diameter of 3 μm via a facile alkali hydrothermal method without adding Al/Si resources or reductant. The product FMP had the saturated magnetization of 10.9 emu g⁻¹ and high Zn²⁺ adsorption capacity of 50.6 mg g⁻¹. Without coagulation with PAC, the removal rate of Fe from the… More > Graphic Abstract

Limin Tian^1,2, Jianpeng Wei³, Jiping Hao^1,*, Qiushuo Wang¹

Journal of Renewable Materials, Vol.9, No.9, pp. 1571-1597, 2021, DOI:10.32604/jrm.2021.015166

Abstract Bamboo is a renewable and environmentally friendly material often used for construction. This study investigates the flexural behavior of bamboo beams through theoretical and finite element (FE) analyses. Considering the material’s nonlinearity, a method of calculating load-deflection curves is proposed and validated via FE analysis. The interfacial slippage dominated by the shear stiffness of the interface between two bamboo poles significantly influences the flexural behavior of double-pole bamboo beams. Thus, the load-deflection curves for different shear stiffnesses can be obtained via theoretical and FE analyses. Subsequently, a novel configuration using diagonal steel bands to avoid slippage is presented. An inclination… More > Graphic Abstract

BIOCELL, Vol.45, Suppl.2, pp. 1-21, 2021

Abstract This article has no abstract. More >

BIOCELL, Vol.45, Suppl.1, pp. 1-173, 2021

Abstract This article has no abstract. More >

ALFONSO BLÁZQUEZ-CASTRO^1,2,*, JUAN CARLOS STOCKERT^2,3

BIOCELL, Vol.45, No.4, pp. 849-862, 2021, DOI:10.32604/biocell.2021.015900

Abstract Melanins (eumelanin, pheomelanin, and allomelanin) represent a very, if not the most, important group of biological pigments. Their biological roles are multiple, from photoprotection to antioxidant activity, heavy metal disposal or the myriad uses of color in organisms across all Phyla. In the first part of this review, eumelanin biology and some chemical aspects will be presented, as well as key physico-chemical features that make this biological pigment so interesting. The principal characteristics of the melanocyte, the melanin-synthesizing cell in mammals, will also be introduced. Transformed melanocytes are the cause of one of the most devastating known cancers: the malignant… More >