Article
Materials Science, Multidisciplinary
QuanZhe Liu, Jung Hun Kim, MinJoon Cho, Su Hyeon Kim, Bin Xu, Sivashanmugam Amirthalingam, Nathaniel S. Hwang, Jae Hyup Lee
Summary: In this study, a new functional bone cement was synthesized by incorporating tetracalcium phosphate and whitlockite with PMMA cement, and its characteristics were evaluated based on ISO standards. The results showed that this functional bone cement has the potential to promote new bone formation, support bone tissue, and treat osteoporotic vertebral compression fractures (OVCF).
MATERIALS & DESIGN
(2023)
Article
Materials Science, Ceramics
Aathira Pradeep, Praveen Kerala Varma, Thennavan Arumugam, Anjaly Maravattikal Vijayan, Anil Kumar Vasudevan, Jayakumar Rangasamy
Summary: Deep sternal wound infection (mediastinitis) after cardiac surgery can be caused by both Gram-positive and Gram-negative bacteria. The incidence of sternal infection is increasing in current practice and is associated with longer hospital stay, higher medical costs, and increased mortality. A new antibacterial bone adhesive cement called TPAV, composed of tetracalcium phosphate, phosphoserine, amikacin, and vancomycin, has been developed and characterized. TPAV exhibits effective antibacterial properties against various bacteria, inhibiting their growth and biofilm formation. In in vivo studies using a rat sternotomy model infected with Staphylococcus aureus and Escherichia coli, TPAV demonstrated significant inhibitory activity. This study highlights the potential of TPAV as a preventive treatment for mediastinitis in clinical settings.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Biomedical
S. Hesaraki, M. H. Barounian, S. Borhan, M. Shahrezayee, N. Nezafati
Summary: A photocurable composite based on tetracalcuim phosphate ceramic and, hydroxyethyl methacrylate-modified poly(acrylic-maleic acid) was developed for controlled release of Indomethacin in bone defects. Higher amounts of Indomethacin led to better apatite formation and sustained release profile. The Weibull equation provided a better description of the release behavior compared to the power law.
JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
(2023)
Article
Construction & Building Technology
Hu Feng, Zeya Li, Weiqiang Wang, Guanghui Liu, Zhe Zhang, Danying Gao
Summary: This study developed a ductile fibre reinforced magnesium phosphate cement-based composite (DFRMC) with superior deflection hardening capacity, investigating the effects of different factors on its properties through experimental program and introducing new indexes for evaluating the hardening capacity. The DFRMC achieved high compressive strength, nominal flexural strength, and investigated the microstructure of the material.
CEMENT & CONCRETE COMPOSITES
(2021)
Article
Polymer Science
Ioana Lacan, Marioara Moldovan, Codruta Sarosi, Ioan Ardelean
Summary: Calcium phosphate cements can be improved by adding additives such as chitosan. This study used nuclear magnetic resonance (NMR) to investigate the effect of chitosan on the hardening process of the cement and found that chitosan accelerates the hardening dynamics and reduces the amount of unreacted monomers.
Article
Construction & Building Technology
Cong Ma, Xiaoming Zhao, Jinyan Shi, Jing Tao, Haijun Zhou, Biqin Dong, Yanliang Du
Summary: A novel magnesium phosphate cement-based CEA (MEA) mortar was prepared and its properties were systematically investigated. The MEA mortar exhibited a setting time within 30 min and a compressive strength of 15-45 MPa. Increasing the emulsified asphalt to cement ratio reduced the strength, water resistance, and frost resistance of the MEA mortars, while adding emulsified asphalt with low water content improved the setting time and failure strain compared to plain magnesium phosphate cement. This study provides an alternative material for track slab maintenance.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Chemistry, Inorganic & Nuclear
Eaman T. Karim, Veronika Szalai, Lonnie Cumberland, Alline F. Myers, Shozo Takagi, Stanislav A. Frukhtbeyn, Ileana Pazos, Laurence C. Chow
Summary: In this study, carbonate-containing hydroxyapatite (CHA) was synthesized using a self-hardening calcium phosphate cement (CPC) and its paramagnetic properties following gamma-irradiation were investigated. The results suggest that CHA synthesized via CPC cement is a promising substrate for electron paramagnetic resonance (EPR)-based dosimetry applications.
INORGANIC CHEMISTRY
(2022)
Article
Construction & Building Technology
Baoying Yu, Jianwei Zhou, Baojun Cheng, Wen Yang
Summary: The study found that the hardened MPC stone is a ceramic-like structure, which will be disrupted when aggregate is added, resulting in a weak interface transition zone, but still maintaining a high compressive strength.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Guosheng Zhang, Qiang Wang, Yue Li, Mingzhong Zhang
Summary: This study systematically investigates the evolution of phase composition, microstructure, and micro-mechanical properties of magnesium phosphate cement (MPC) and their influence on macroscopic mechanical properties. The microstructure of MPC is primarily composed of potassium magnesium phosphate hexahydrate (MKP) crystals and a hybrid region of magnesium oxide and amorphous hydration products. The elastic modulus and hardness of MKP crystals are 20.18 GPa and 1.15 GPa, respectively. The macroscopic strength of MPC is mainly determined by its pore structure rather than the micro-mechanical properties of hydration products.
CEMENT AND CONCRETE RESEARCH
(2023)
Article
Construction & Building Technology
Yufeng Fan, Guosheng Zhang, Yue Li
Summary: This study investigated the effect of graphene oxide on magnesium phosphate cement, finding that proper addition of graphene oxide can improve the microstructure and mechanical properties of the cement, enhancing the hydration process.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Liang Bai, Hui Zheng, Xin Wang, Xingwen Liang, Shuai Hu
Summary: This study investigated the early water stability of Magnesium Potassium Phosphate Cement (MKPC) blended with Calcium Aluminate Cement (CAC) and Wollastonite (WS). The presence of CAC extended the setting time of MKPC macroscopically due to the stimulating effect of the admixture on the composite retarder. The synergistic effect between CAC and WS enhanced the early water stability and compressive strength of MKPC under water curing. Microscopically, CAC participated in the reaction of the MKPC system, producing crystalline and amorphous products, while WS inhibited crack development and strengthened the brittle matrix.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Materials Science, Ceramics
Cong Ma, Ya Wu, Jinyan Shi, Shenyou Song, Fen Xia, Jian Liu, Haijun Zhou, Biqin Dong, Yanliang Du
Summary: In order to improve the efficiency of repairing asphalt pavements, a rapid-hardening magnesium-based cement emulsified asphalt (MCEA) mortar was developed. The effect of mix parameters on the properties of MCEA sample was investigated, and the results showed that the initial setting time of MCEA paste is within 30 min and the fluidity is 60-180 mm. The compressive and flexural strengths of plain magnesium phosphate cement mortar reach 46.45 and 7.7 MPa, respectively, and they decrease with the increase of A/C, W/C, and M/P ratios.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Biomedical
Lubomir Medvecky, Maria Giretova, Radoslava Stulajterova, Lenka Luptakova, Tibor Sopcak, Vladimir Girman
Summary: Injectable powdered cement tetracalcium phosphate/monetite/silk fibroin composite (CFIB) with soluble silk fibroin was prepared, showing potential positive effects in bone defect treatments. After hardening in simulated body fluid, almost full transformation of calcium phosphate components in composites to nanohydroxyapatite was observed, with silk fibroin influencing the fluidity and microstructure of the cement.
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS
(2022)
Article
Construction & Building Technology
Suhui Zhang, Qiuyi Li, Qiang Yuan, Shangfu Yang, Xiaodi Dai
Summary: This paper investigated the bonding performance between magnesium phosphate cement concrete (MPC) and ordinary portland cement concrete (OPC) with different roughness. The results showed a positive correlation between roughness and bonding performance, with the bonding interface categorized into two forms: MPC paste bonding to OPC paste, and MPC paste bonding to the aggregate.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Zhen Li, Ludan Lin, Jincheng Yu, Hao Tang, Jihui Qin, Jueshi Qian
Summary: This study investigates the effect of dipotassium hydrogen phosphate (DKP) on the fluidity, setting time, rheological behavior, compressive strength, and drying shrinkage of magnesium silicate hydrate cement. The results show that DKP can be used as a superplasticizer to improve the performance of M-S-H cement, including increased compressive strength and reduced drying shrinkage.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Engineering, Biomedical
Lubomir Medvecky, Radoslava Stulajterova, Maria Giretova, Tibor Sopcak, Zuzana Molcanova, Karol Koval
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE
(2020)
Article
Chemistry, Physical
Lubomir Medvecky, Maria Giretova, Radoslava Stulajterova, Jan Danko, Katarina Vdoviakova, Lenka Kresakova, Zdenek Zert, Eva Petrovova, Katarina Holovska, Maros Varga, Lenka Luptakova, Tibor Sopcak
Summary: Novel calcium phosphate cements containing a mixture of four amino acids were used to treat artificial osteochondral defects in the knee, with successful formation of hyaline cartilage and subchondral bone. The enhanced concentration of extracellular collagen amino acids in the cement supported the healing of the defects, showing excellent results in pigs without inflammation and stable tissues after 12 months' healing, with good integration of neocartilage and surrounding tissues.
Article
Chemistry, Physical
Lubomir Medvecky, Maria Giretova, Radoslava Stulajterova, Lenka Luptakova, Tibor Sopcak
Summary: The modified one-step process allowed the formation of tetracalcium phosphate/monetite/calcium sulfate hemihydrate (CAS) with nanoparticles, and the presence of nano calcium sulfate hemihydrate (CSH) in small amounts was found to enhance the in vitro bioactivity of CAS cement. This enhanced bioactivity shows potential for bone defect treatment and bone healing.
Article
Polymer Science
Eva Petrovova, Marek Tomco, Katarina Holovska, Jan Danko, Lenka Kresakova, Katarina Vdoviakova, Veronika Simaiova, Filip Kolvek, Petra Hornakova, Teodor Toth, Jozef Zivcak, Peter Gal, David Sedmera, Lenka Luptakova, Lubomir Medvecky
Summary: Biopolymer composites provide an optimal environment for the regeneration of articular cartilage defects, with potential for clinical testing in the orthopedic field. The use of acellular polyhydroxybutyrate/chitosan implants in sheep models showed promising results, with hyaline-like cartilage formation observed in most treated animals.
Article
Agriculture, Dairy & Animal Science
Filip Kol'vek, Lenka Kresakova, Katarina Vdoviakova, L'ubomir Medvecky, Zdenek Zert
Summary: Subchondral cystic lesions are common in horses and can cause lameness. Fusion surgery for joints with these lesions may require the use of screws and plates for stability. Horse owners should be aware of the potential need for surgical intervention with this condition.
Article
Chemistry, Physical
Lenka Kresakova, Jan Danko, Katarina Vdoviakova, Lubomir Medvecky, Zdenek Zert, Eva Petrovova, Maros Varga, Tatiana Spakovska, Jozef Pribula, Miroslav Gasparek, Maria Giretova, Radoslava Stulajterova, Filip Kolvek, Zuzana Andrejcakova, Veronika Simaiova, Marian Kadasi, Vladimir Vrabec, Teodor Toth, Vladimir Hura
Summary: This study demonstrated that treatment of osteochondral defects with the novel biocement enriched with amino acids is an effective solution for sheep, resulting in efficient regeneration of articular cartilage with predominant characteristics of hyaline cartilage. The use of this new biocement can induce endogenous regeneration of cartilage and provide multiple benefits for future therapies supporting osteochondral defect healing.
Article
Multidisciplinary Sciences
Csilla Tothova, Oskar Nagy, Jaroslav Novotny, Katarina Vdoviakova, Lenka Kresakova, Jan Danko, Zdenek Zert, Lubomir Medvecky, Eva Petrovova
Summary: This study investigated the changes in inflammatory markers and enzyme activities following the repair of induced articular cartilage defects in pigs. The results suggest that SAA, Hp, CRP, and pig-MAP may be useful biomarkers for monitoring acute phase responses during the postoperative period.
Article
Chemistry, Physical
Radoslava Stulajterova, Lubomir Medvecky, Maria Giretova, Tibor Sopcak, Lenka Luptakova, Radovan Bures, Eva Szekiova
Summary: Magnesium pyrophosphate modified tetracalcium phosphate/monetite cement mixtures were prepared through simple mechanical homogenization and showed suitable setting properties and biocompatibility for the treatment of bone defects.
Article
Chemistry, Multidisciplinary
Helena Brunckova, Erika Mudra, Magdalena Streckova, Lubomir Medvecky, Tibor Sopcak, Ivan Shepa, Alexandra Kovalcikova, Maksym Lisnichuk, Hristo Kolev
Summary: The present study focuses on the synthesis and structural properties of amorphous terbium metal-organic framework thin film (TbMOF-TF) and its transformation to terbium oxide at 450 degrees C. Different amounts of modulator were used to prepare crystalline and amorphous films, which were characterized by various techniques. The results showed that the amorphous film was fully transformed to terbium oxide at 450 degrees C.
Article
Oncology
Zuzana Demcisakova, Lenka Luptakova, Zuzana Tirpakova, Alena Kvasilova, Lubomir Medvecky, Ward De Spiegelaere, Eva Petrovova
Summary: The chorioallantoic membrane (CAM) is widely used as an in vivo model to study angiogenesis and its inhibition. This study evaluates the angiogenic potential of an acellular biopolymer scaffold using the CAM assay, showing promising results for the treatment of hard tissue defects.
Article
Chemistry, Physical
Radoslava Stulajterova, Maria Giretova, Lubomir Medvecky, Tibor Sopcak, Lenka Luptakova, Vladimir Girman
Summary: The effect of adding nanosilica on the microstructure and osteogenic differentiation of mesenchymal stem cells in a cement mixture was studied. The results showed that the addition of nanosilica improved the compactness of the microstructure and enhanced the injectability of the cement paste, as well as promoted the upregulation of osteogenic markers in cells cultured in cement extracts.
Article
Biotechnology & Applied Microbiology
Lenka Kresakova, Lubomir Medvecky, Katarina Vdoviakova, Maros Varga, Jan Danko, Roman Totkovic, Tatiana Spakovska, Marko Vrzgula, Maria Giretova, Jaroslav Briancin, Veronika Simaiova, Marian Kadasi
Summary: This study investigated the effects of hydroxyapatite (HA) ceramic implants on bone defect healing, focusing on biocompatibility, biodegradability, osteoconductivity, osteoinductivity, and osteointegration with surrounding bone tissue. The results showed that HA ceramic implants exhibited good biocompatibility and osteoconductivity. The group with perforated HA plates showed the highest degree of biodegradation, bioresorption, and new bone formation.
BIOENGINEERING-BASEL
(2023)
Article
Engineering, Biomedical
Lubomir Medvecky, Maria Giretova, Radoslava Stulajterova, Tibor Sopcak, Pavlina Jevinova, Lenka Luptakova
Summary: New biocements based on a mixture of calcium phosphate/monetite modified with honey were prepared. The addition of honey did not affect the setting process of the cements and promoted the formation of calcium-deficient nanohydroxyapatite. The honey cements exhibited lower compressive strength but showed good antibacterial activity and enhanced antioxidant inhibitory activity. Furthermore, the addition of honey also increased the bioactivity of the cements, indicating their potential as therapeutic candidates for bone defect repair.
JOURNAL OF FUNCTIONAL BIOMATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Helena Brunckova, Erika Mudra, Lucas Rocha, Eduardo Nassar, Willian Nascimento, Hristo Kolev, Maksym Lisnichuk, Alexandra Kovalcikova, Zuzana Molcanova, Magdalena Streckova, Lubomir Medvecky
Summary: This study successfully synthesized lanthanide metal-organic frameworks with excellent luminescence properties, confirmed by XPS analysis of surface chemistry compositions and mixed valence states. These novel materials exhibit superior red emission suitable for commercial phosphor applications and show potential as UV light sensors for biological applications.
Article
Engineering, Biomedical
Lubomir Medvecky, Radoslava Stulajterova, Maria Giretova, Lenka Luptakova, Tibor Sopcak
JOURNAL OF FUNCTIONAL BIOMATERIALS
(2020)
Article
Materials Science, Multidisciplinary
Deyong Zheng, Huihui Jin, Yucong Liao, Pengxia Ji
Summary: In this study, a highly stable and efficient catalyst, fluorine-doped Co3O4 (F-Co3O4), was developed for hydrogen production by water electrolysis. The F-Co3O4 catalyst exhibited a remarkable reduction in overpotential and demonstrated excellent stability for over 100 hours.
Article
Materials Science, Multidisciplinary
Ziwen Lv, Jintao Wang, Fengyi Wang, Jianqiang Wang, Fuquan Li, Hongtao Chen
Summary: Adding Cu6Sn5 nano particles can effectively inhibit the overgrowth of intermetallic compounds at the interfaces of solder joints in electronic devices, providing a solution to this issue. A new growth mechanism of intermetallic compounds at the interfaces was identified.
Article
Materials Science, Multidisciplinary
Jun Wang, Jiawei Chen, Wanru Liao, Fangyang Liu, Min Liu, Liangxing Jiang
Summary: A BiOI/AgI/Ag plasmonic heterostructure photocathode was successfully designed through electrodeposition, ion-exchange, and illumination methods. This photocathode exhibits superior performance in photoelectrochemical water splitting.
Article
Materials Science, Multidisciplinary
Xiaoxiao Liu, Xianxian Zhou, Xiaotao Ma, Qinbo Yuan, Shibin Liu
Summary: In this study, the authors propose a method to accelerate the reaction of polysulfides in lithium-sulfur batteries using a Ni@OC Mott-Schottky heterojunction as a catalyst. The experimental results demonstrate that the charge redistribution at the Ni@OC interface accelerates electron transfer and enhances catalytic activity, leading to improved reaction kinetics and battery performance.
Article
Materials Science, Multidisciplinary
Dayou Ma, Mohammad Rezasefat, Joziel Aparecido da Cruz, Sandro Campos Amico, Marco Giglio, Andrea Manes
Summary: The matrix has a significant effect on the impact resistance of composite materials. Replacing a brittle polymer with a more flexible one can improve impact resistance, but it poses challenges to standard testing methods. This study designs a new fixture for testing the low-velocity impact of soft composites and investigates the effect of the fixture on the mechanical performance.
Article
Materials Science, Multidisciplinary
Lingchang Wang, Qihang Yang, Huzhen Li, Ming Wei, Qian Wang, Zhenzhong Hu, Mengmeng Zhen
Summary: Bronze titanium dioxide (TiO2(B)) is a promising anode material for lithium-ion batteries due to its high specific capacity. However, its practical applications are hindered by poor conductivity and limited electrochemical kinetics. In this study, TiO2(B)-carbon nanosheets heterostructures are synthesized to enhance the cycling performance and rate capability of TiO2(B).
Article
Materials Science, Multidisciplinary
Atul Thakur, Ritesh Verma, Ankush Chauhan, Fayu Wan, Preeti Thakur
Summary: In this study, BaFe12O19 and BaFe12O19: Epoxy (50:50) nanocomposites were synthesized using the co-precipitation method. The structural information and material properties, such as crystallite size and electrical conductivity, were characterized by XRD, FESEM, EDX, and TEM techniques.
Article
Materials Science, Multidisciplinary
Jingyu Wu, Xinyan Ma, Yong Yang
Summary: A well-defined CoS2@NC(CS-500) hierarchical binder-free catalyst cathode is constructed through in-situ grown of ZIF-67 on carbon cloth and high-temperature carbonization. The cathode shows excellent reaction kinetics and electrochemical performance, providing inspiration for developing advanced Li-CO2 battery catalysts.
Article
Materials Science, Multidisciplinary
Svetlana M. Posokhova, Vladimir A. Morozov, Kirill N. Boldyrev, Dina Deyneko, Erzhena T. Pavlova, Bogdan I. Lazoryak
Summary: This study explores the impact of synthesis method and composition on the structure and luminescence properties of K5Eu1-xHox(MoO4)4 with the palmierite-type matrix. The co-doping of Eu3+ and Ho3+ ions plays a critical role in manipulating charge transfer and luminescence efficiency in the visible and infrared regions.
Article
Materials Science, Multidisciplinary
Jian Wang, Yeting Tao, Jingsheng Wang, Youtian Tao
Summary: A new electron-transport material iTPyBI-CN is developed through non-catalytic C-N coupling reaction. It exhibits better electroluminescence efficiency in organic light-emitting diodes compared to the commercial material TPBI, due to its twisted geometry and higher energy levels.
Article
Materials Science, Multidisciplinary
Tao Zhu, Feng Huang, Shuo Li, Yang Zhou
Summary: This article combines XRD analysis and microscopic structural observation to investigate the changes in limestone after high-temperature treatment. It finds that 500 degrees C is the critical temperature for crystalline and spatial arrangement changes in limestone, and the thermal conductivity, specific heat capacity, and heat storage coefficient gradually decrease after thermal treatment.
Article
Materials Science, Multidisciplinary
Muhammad Haekal Habibie, Fransiska Sri Herwahyu Krismastuti, Abdi Wira Septama, Faiza Maryani, Vivi Fauzia
Summary: This study focuses on the synthesis of zinc oxide nanostructure from zinc recovered from galvanization ash and highlights its potential as a sustainable source of zinc and as an antibacterial agent.
Article
Materials Science, Multidisciplinary
Jingyi Li, Yixin Xing, Wei Gu, Shousi Lu
Summary: In this study, PC@CaP microparticles were fabricated using biomimetic mineralization. The results showed that under environmental stress, PC@CaP exhibited improved stability and antioxidative activity, indicating its potential use in high-added value fields.
Article
Materials Science, Multidisciplinary
Yan Liu, Shunyou Chen
Summary: In this study, TNTs were used as a drug carrier and modified with ZIF-8 and silk fibroin to obtain a new drug loading platform. The results showed that this drug-loaded platform had a good drug release effect in vitro and could promote cell proliferation and osteogenic differentiation.
Article
Materials Science, Multidisciplinary
Chunhui Zhu, Wentao Wang, Qing Zhen, Xinning Huang, Shixin Li, Shaochang Wang, Xiaoping Ma, Xiaoxia Liu, Yalong Jiao, Kai Sun, Zhuangzhi Li, Huaixin Yang, Jianqi Li
Summary: A type of stacking fault is revealed in e-InSe crystal, which is associated with a small stacking-fault energy and shows exceptional plasticity.