Bunyamin Bunyamin^1,2, Taufiq Saidi³, Sugiarto Sugiarto^3,4, Muttaqin Hasan^3,*

Structural Durability & Health Monitoring, Vol.19, No.5, pp. 1089-1109, 2025, DOI:10.32604/sdhm.2025.066887 - 05 September 2025

Abstract Aceh in Indonesia is rich in marine resources and abundant fishery products such as oyster. Traditionally, fishermen only harvest oysters and discard the shells, which can cause pollution and environmental contamination. Waste Oyster Shells (WOS) contain a high percentage of calcium carbonate (CaCO₃) that experiences thermal decomposition at high temperature, following the reaction CaCO₃ → CaO + CO₂ (ΔT = 825°C). At temperature > 900°C, dead-burned lime is formed, which severely influences CaO reactivity. However, the optimum temperature for producing high CaO content is still uncertain. Therefore, this study aimed to determine the optimum calcination temperature to… More > Graphic Abstract

Kenji Sorimachi^1,2,*, Toshinori Tsukada³, Hossam A. Gabbar⁴

Energy Engineering, Vol.122, No.6, pp. 2177-2185, 2025, DOI:10.32604/ee.2025.064975 - 29 May 2025

Abstract Recently, we developed an innovative CO₂ capture and storage method based on simple chemical reactions using NaOH and CaCl₂. In this technology, it was newly found that the addition of CO₂ gas produced CaCO₃ (limestone) in the solution of NaOH and CaCl₂ at less than 0.2 N NaOH, while at more than 0.2 N NaOH, Ca(OH)₂ formation occurred merely without CO₂. The present study has been designed to develop an integrated system in which the electrolysis unit is combined with the CO₂ fixation unit. As the electrolysis of NaCl produces simultaneously not only electricity but also H₂ and Cl₂, the… More > Graphic Abstract

Deni Fajar Fitriyana^1,2,*, Rifky Ismail^1,3,*, Athanasius Priharyoto Bayuseno¹, Januar Parlaungan Siregar^4,5, Tezara Cionita⁶

Journal of Renewable Materials, Vol.12, No.6, pp. 1145-1163, 2024, DOI:10.32604/jrm.2024.052165 - 02 August 2024

Abstract Hydroxyapatite (HA) is a bio ceramic commonly utilized in bone tissue engineering due to its bioactive and osteoconductive properties. Crab shells are usually disregarded as waste material despite their significant CaCO content, and have not been widely utilized in the synthesis of HA. This study aims to synthesize and analyze HA derived from crab shells using the hydrothermal method with different durations of holding time. This study utilized precipitated calcium carbonate (PCC) derived from crab shells. With a hydrothermal reactor set at 160°C and varying holding times of 14 (HA_14), 16 (HA_16), and 18 (HA_18)… More > Graphic Abstract

JUNYING XU^1,#, PING LI^1,#, GE WANG², DAQIANG YE^1,*, XIUFU TANG^3,*

BIOCELL, Vol.48, No.2, pp. 283-291, 2024, DOI:10.32604/biocell.2023.045429 - 23 February 2024

Abstract Background: α7 nicotinic acetylcholine receptor (α7nAChR) has been demonstrated to be involved in numerous of inflammatory diseases. Cell pyroptosis is a kind of cell death accompanied by inflammation. Objectives: The objective of this work is to explore the function of α7nAChR on cell pyroptosis in cervical cancer cells. Methods: Immunoblotting, quantitative polymerase chain reaction, and enzyme-linked immunosorbent assay were employed to examine the function of α7nAChR on cell pyroptosis and metabolic changes. Results: Herein, we found that α7nAChR inhibition led to cell pyroptosis in HeLa and SiHa of cervical cancer cells, which was attributed to the… More >

Jinshuo Wang, Lida Xing, Fulong Zhang, Chuanfu Liu^*

Journal of Renewable Materials, Vol.12, No.1, pp. 89-102, 2024, DOI:10.32604/jrm.2023.029057 - 23 January 2024

Abstract Wood-based functional materials have developed rapidly. But the flammability significantly limits its further application. To improve the flame retardancy, the balsa wood was delignified by NaClO₂ solution to create a cellulose scaffold, and then alternately immersed in CaCl₂ ethanol solution and NaHCO₃ aqueous solution under vacuum. The high porosity and wettability resulting from delignification benefited the following mineralization process, changing the thermal properties of balsa wood significantly. The organic-inorganic wood composite showed abundant CaCO₃ spherical particles under scanning electron microscopy. The peak of the heat release rate of delignified balsa-CaCO₃ was reduced by 33% compared to the native More > Graphic Abstract

Cuicui Wang¹, Xin Wei¹, Lee M. Smith², Ge Wang¹, Shuangbao Zhang³, Haitao Cheng^1,*

Journal of Renewable Materials, Vol.10, No.7, pp. 1829-1844, 2022, DOI:10.32604/jrm.2022.018782 - 07 March 2022

Abstract In order to investigate the effect of the relative motion of nano CaCO₃ reinforced bamboo pulp fiber (BPF)/HDPE composite components on the mechanical performance, a comparative study was performed. BPF was treated by nano CaCO₃ blending (BM) and impregnation modification (IM) technology. The composites were produced using hot press (HPMP), extrusion (EMP) and injection molding process (IMP). The physical morphology of BPF was similar at different manufacturing processes. Compared to the samples manufactured by HPMP, a decrease in the (specific) flexural strength of BPF/HDPE composites and an increase in those of composites treated by nano CaCO₃ manufactured More >

GALINA N. DENISOVA¹, IVAN D. DIMOV¹, ANNA V. ZAITSEVA^1,2, LINARD J. ARTIUX³, ALEXANDER A. MIRONOV^1,4,*, NATALIA R. KARELINA¹

BIOCELL, Vol.45, No.3, pp. 773-783, 2021, DOI:10.32604/biocell.2021.014233 - 03 March 2021

Abstract Overloading the intestine enterocytes with lipids induced alteration of the Golgi complex (GC; ) and could cause glycosylation errors. Here, using differentiated Caco-2 cells with the established 0[I] blood group phenotype (no expression of the blood antigens A and B [AgA, AgB] under normal conditions) as a model of human enterocytes we examined whether the overloading of these cells with lipids could cause errors in the Golgi-dependent glycosylation. We demonstrated that under these conditions, there were alterations of the GC and the appearance of lipid droplets in the cytoplasm. Rare cells produced AgA and AgB. More >