keyword
https://read.qxmd.com/read/38527878/removal-of-cr-vi-by-glutaraldehyde-crosslinked-chitosan-encapsulating-microscale-zero-valent-iron-synthesis-mechanism-and-longevity
#1
JOURNAL ARTICLE
Yijun Duan, Fang Liu, Xiang Liu, Miao Li
Microscale zero-valent iron (mZVI) has shown great potential for groundwater Cr(VI) remediation. However, low Cr(VI) removal capacity caused by passivation restricted the wide use of mZVI. We prepared mZVI/GCS by encapsulating mZVI in a porous glutaraldehyde-crosslinked chitosan matrix, and the formation of the passivation layer was alleviated by reducing the contact between zero-valent iron particles. The average pore diameter of mZVI/GCS was 8.775 nm, which confirmed the mesoporous characteristic of this material...
August 2024: Journal of Environmental Sciences (China)
https://read.qxmd.com/read/38522812/termostable-and-effective-immobilized-invertase-for-sucrose-determination-in-fruit-juices
#2
JOURNAL ARTICLE
Orhun Hakkoymaz, Hidayet Mazı
In this study, immobilization of invertase enzyme was performed on a previously synthesized and characterized poly(N-vinylpyrrolidone-co-butylacrylate-co-N hydroxymethylacrylamide) terpolymer membranes by covalent bonding method. Glutaraldehyde(GA) was used as the crosslinker and Bovine Serum Albumin(BSA) was used as the binding agent. Optimum pH, temperature, amount of polymer, substrate concentration, amount of BSA and amount of GA values were determined for both free and immobilized enzyme. Optimum pH and temperature values were found as pH = 5...
March 22, 2024: Analytical Biochemistry
https://read.qxmd.com/read/38518444/binary-probiotic-fermentation-promotes-signal-cyclic-amp-exchange-to-increases-the-number-of-viable-probiotics-anthocyanins-and-polyphenol-content-and-the-odor-scores-of-wolfberry-fermented-beverages
#3
JOURNAL ARTICLE
Xiankang Fan, Mingzhen Liu, Zihang Shi, Tao Zhang, Lihui Du, Zhen Wu, Xiaoqun Zeng, Xiang Wu, Daodong Pan
The effects and underlying molecular mechanisms of binary probiotics (Lactiplantibacillus plantarum subsp. plantarum CGMCC 1.5953 and Lacticaseibacillus casei CGMCC 1.5956) on the quality of wolfberry fermented beverages (WFB) were investigated. The results indicated that binary probiotics increased the number of probiotics, anthocyanin (89.92 ± 1.64 mg/L), polyphenol content (283.04 ± 3.81 µg/mL), and odor score (24.19) in WFB. Metabolomics found that they could enhance signal exchange (cyclic AMP) between binary probiotics and improve the utilization of citrulline, d-proline, d-glucose, and d-galactose through galactose metabolism and amino acid biosynthesis pathway to promote probiotics growth...
March 20, 2024: Food Chemistry
https://read.qxmd.com/read/38515622/a-photoelectrochemical-aptasensor-based-on-double-z-scheme-%C3%AE-fe-2-o-3-mos-2-bi-2-s-3-ternary-heterojunction-for-sensitive-detection-of-circulating-tumor-cells
#4
JOURNAL ARTICLE
Kai Feng, Ya Di, Meng Han, Weitao Yan, Yulin Guo, Xiangqian Huai, Yimin Wang
A novel photoelectrochemical (PEC) aptasensor based on a dual Z-scheme α-Fe2 O3 /MoS2 /Bi2 S3 ternary heterojunction for the ultrasensitive detection of circulating tumor cells (CTCs) was developed. The α-Fe2 O3 /MoS2 /Bi2 S3 nanocomposite was prepared via a step-by-step route, and the photoproduced electron/hole transfer path was speculated by conducting trapping experiments of reactive species. α-Fe2 O3 /MoS2 /Bi2 S3 -modified electrodes exhibited greatly enhanced photocurrent under visible light due to the double Z-scheme charge transfer process, which met the requirement of the PEC sensor for detecting larger targets...
2024: Frontiers in Bioengineering and Biotechnology
https://read.qxmd.com/read/38514431/combined-effects-of-glutaraldehyde-based-desensitizer-and-nd-yag-laser-on-dentinal-tubules-occlusion
#5
JOURNAL ARTICLE
Alya H Alzarooni, Hatem M El-Damanhoury, Soumya S Aravind, Betul Rahman
AIM: The aim of this study was to assess the impact of Nd:YAG laser, glutaraldehyde-based desensitizer (GD), or their combination on occluding dentinal tubules. MATERIALS AND METHODS: Fifty dentin samples were obtained from non-carious human third molars and randomly divided into five groups ( n = 10): (1) Control group treated with 37% phosphoric acid, (2) GD group, (3) Nd:YAG laser group (1064 nm, 100 µs, 10 Hz, 300 µm fiber, 1 W power, 100 mJ energy, and 85 J/cm2 energy density), (4) GD followed by Nd:YAG laser group, and (5) Nd:YAG laser followed by GD group...
January 1, 2024: Journal of Contemporary Dental Practice
https://read.qxmd.com/read/38513498/magnetic-nanoparticles-immobilized-thrombin-ligand-fishing-to-screen-thrombin-inhibitors-in-natural-products
#6
JOURNAL ARTICLE
Hui Guo, Lili Guo, Jianwei Yu, Fengju Zhao, Wei Yang, Jiaxin Li, Hanqi Chen, Junqing Qian
In this study, thrombin was immobilized with magnetic particles modified by glutaraldehyde. The changes in secondary structures of immobilized enzyme revealed an increment in conformational rigidity and stability, which can be reflected in temperature and pH stability as well as the tolerance of organic reagents. The optimal reutilization times of magnetic particle immobilized thrombin were 7 times, and the half-life of enzyme activity preserved at room temperature was 5 days, which was 2.5 times higher than that of free enzyme...
March 15, 2024: Journal of Pharmaceutical and Biomedical Analysis
https://read.qxmd.com/read/38504187/outcomes-post-ozaki-procedure-among-children-with-aortic-valve-disease-at-jakaya-kikwete-cardiac-institute-dar-es-salaam-tanzania-a-retrospective-descriptive-study
#7
JOURNAL ARTICLE
Zawadi Edward Kalezi, Alphonce Nsabi Simbila, Stella Mongella, Deogratias Nkya, Godwin Sharau, Felix Shonyela, Vivienne Mlawi, Naizihijwa Majani
BACKGROUND: Aortic valve reconstruction using glutaraldehyde-treated autologous pericardium, also called Ozaki procedure, is a surgical procedure for patients with aortic valve disease. Gratifying results have been reported in adult patients, however, limited published data is available in paediatric population. This study looked at clinical characteristics and early outcomes of children who underwent Ozaki procedure at our Institute. METHODS: This was a retrospective descriptive study conducted on children who underwent aortic valve reconstruction at Jakaya Kikwete Cardiac Institute (JKCI) from January 2019 through December 2022...
March 19, 2024: BMC Cardiovascular Disorders
https://read.qxmd.com/read/38498344/surface-chemical-modification-of-poly-dimethylsiloxane-for-stabilizing-antibody-immobilization-and-t-cell-cultures
#8
JOURNAL ARTICLE
Qiongjiao Zeng, Bowen Xu, Cheng Qian, Nan Li, Zhenhong Guo, Shuqing Wu
Advances in cell immunotherapy underscore the need for effective methods to produce large populations of effector T cells, driving growing interest in T-cell bioprocessing and immunoengineering. Research suggests that T cells demonstrate enhanced expansion and differentiation on soft matrices in contrast to rigid ones. Nevertheless, the influence of antibody conjugation chemistry on these processes remains largely unexplored. In this study, we examined the effect of antibody conjugation chemistry on T cell activation, expansion and differentiation using a soft and biocompatible polydimethylsiloxane (PDMS) platform...
March 18, 2024: Biomaterials Science
https://read.qxmd.com/read/38488041/chitosan-coated-biomass-waste-based-magnetic-hydrogel-beads-for-the-removal-of-methylene-blue
#9
JOURNAL ARTICLE
Şerife Parlayıcı, Aslı Aras
Due to developing technology and increasing population, human needs have increased, and textile activities have gained momentum. Many synthetic dyestuffs are used to meet the needs in this field. In this study, a cheap, useful, innovative, environmentally friendly and sustainable adsorbent was developed for the removal of Methylene Blue(MB), which is one of the dyes that is harmful to the environment. In the cultivation of fruit trees, in addition to the product, very high amounts of by-products/waste (garbage, branches, bark, leaves, etc...
March 15, 2024: International Journal of Phytoremediation
https://read.qxmd.com/read/38423428/chitosan-based-foam-composites-for-hexavalent-chromium-remediation-effect-of-microcellulose-and-crosslinking-agent-content
#10
JOURNAL ARTICLE
Marcelo Bruno de Oliveira Silva, Talles Barcelos da Costa, Paulo Henrique Camani, Derval Dos Santos Rosa
Potentially toxic metal ions, such as hexavalent chromium (Cr6+ ), present in water concern the population's health due to their persistence, bioaccumulation potential, and high toxicity. Highly porous materials based on polysaccharides are promising technologies for metal removal due to their high surface area, biodegradability, and low toxicity. This study evaluated the effect of concentrations of microcellulose (0.5, 1, and 1.5 %) and glutaraldehyde (1, 2, and 3 %) in the adsorption capacity and mechanical properties of chitosan foams...
February 27, 2024: International Journal of Biological Macromolecules
https://read.qxmd.com/read/38417754/adsorption-features-of-reduced-aminated-supports-modified-with-glutaraldehyde-understanding-the-heterofunctional-features-of-these-supports
#11
JOURNAL ARTICLE
Diandra de Andrades, Pedro Abellanas, Diego Carballares, Andres R Alcantara, Maria de Lourdes Teixeira de Moraes Polizeli, Javier Rocha-Martin, Roberto Fernandez-Lafuente
Immobilization of enzymes on aminated supports using the glutaraldehyde chemistry may involve three different interactions, cationic, hydrophobic, and covalent interactions. To try to understand the impact this heterofunctionality, we study the physical adsorption of the beta-galactosidase from Aspergillus niger, on aminated supports (MANAE) and aminated supports with one (MANAE-GLU) or two molecules of glutaraldehyde (MANAE-GLU-GLU). To eliminate the chemical reactivity of the glutaraldehyde, the supports were reduced using sodium borohydride...
February 26, 2024: International Journal of Biological Macromolecules
https://read.qxmd.com/read/38399851/disposable-polyaniline-m-phenylenediamine-based-electrochemical-lactate-biosensor-for-early-sepsis-diagnosis
#12
JOURNAL ARTICLE
Piromya Thongkhao, Apon Numnuam, Pasarat Khongkow, Surasak Sangkhathat, Tonghathai Phairatana
Lactate serves as a crucial biomarker that indicates sepsis assessment in critically ill patients. A rapid, accurate, and portable analytical device for lactate detection is required. This work developed a stepwise polyurethane-polyaniline- m -phenylenediamine via a layer-by-layer based electrochemical biosensor, using a screen-printed gold electrode for lactate determination in blood samples. The developed lactate biosensor was electrochemically fabricated with layers of m -phenylenediamine, polyaniline, a crosslinking of a small amount of lactate oxidase via glutaraldehyde, and polyurethane as an outer membrane...
February 8, 2024: Polymers
https://read.qxmd.com/read/38396791/apoe-isoforms-inhibit-amyloid-aggregation-of-proinflammatory-protein-s100a9
#13
JOURNAL ARTICLE
Shamasree Ghosh, Shanmugam Tamilselvi, Chloe Williams, Sanduni W Jayaweera, Igor A Iashchishyn, Darius Šulskis, Jonathan D Gilthorpe, Anders Olofsson, Vytautas Smirnovas, Željko M Svedružić, Ludmilla A Morozova-Roche
Increasing evidence suggests that the calcium-binding and proinflammatory protein S100A9 is an important player in neuroinflammation-mediated Alzheimer's disease (AD). The amyloid co-aggregation of S100A9 with amyloid-β (Aβ) is an important hallmark of this pathology. Apolipoprotein E (ApoE) is also known to be one of the important genetic risk factors of AD. ApoE primarily exists in three isoforms, ApoE2 (Cys112/Cys158), ApoE3 (Cys112/Arg158), and ApoE4 (Arg112/Arg158). Even though the difference lies in just two amino acid residues, ApoE isoforms produce differential effects on the neuroinflammation and activation of the microglial state in AD...
February 9, 2024: International Journal of Molecular Sciences
https://read.qxmd.com/read/38395982/vancomycin-and-nisin-modified-magnetic-fe-3-o-4-sio-2-nanostructures-coated-with-chitosan-to-enhance-antibacterial-efficiency-against-methicillin-resistant-staphylococcus-aureus-mrsa-infection-in-a-murine-superficial-wound-model
#14
JOURNAL ARTICLE
Mona Nasaj, Abbas Farmany, Leili Shokoohizadeh, Farid Aziz Jalilian, Reza Mahjoub, Ghodratollah Roshanaei, Alireza Nourian, Omid Heydari Shayesteh, Mohammadreza Arabestani
BACKGROUND: The objective of this research was to prepare some Fe3 O4 @SiO2 @Chitosan (CS) magnetic nanocomposites coupled with nisin, and vancomycin to evaluate their antibacterial efficacy under both in vitro and in vivo against the methicillin-resistant Staphylococcus. aureus (MRSA). METHODS: In this survey, the Fe3 O4 @SiO2 magnetic nanoparticles (MNPs) were constructed as a core and covered the surface of MNPs via crosslinking CS by glutaraldehyde as a shell, then functionalized with vancomycin and nisin to enhance the inhibitory effects of nanoparticles (NPs)...
February 23, 2024: BMC chemistry
https://read.qxmd.com/read/38392713/immobilization-and-characterization-of-a-processive-endoglucanase-eg5c-1-from-bacillus-subtilis-on-melamine-glutaraldehyde-dendrimer-functionalized-magnetic-nanoparticles
#15
JOURNAL ARTICLE
Xiaozhou Li, Jie Chen, Bin Wu, Zhen Gao, Bingfang He
Exploring an appropriate immobilization approach to enhance catalytic activity and reusability of cellulase is of great importance to reduce the price of enzymes and promote the industrialization of cellulose-derived biochemicals. In this study, Fe3 O4 magnetic nanoparticles (MNPs) were functionalized with meso-2,3-dimercaptosuccinic acid to introduce carboxyl groups on the surface (DMNPs). Then, melamine-glutaraldehyde dendrimer-like polymers were grafted on DMNPs to increase protein binding sites for the immobilization of processive endoglucanase EG5C-1...
February 9, 2024: Nanomaterials
https://read.qxmd.com/read/38391894/evaluation-of-the-dentinal-shear-bond-strength-and-resin-interface-in-primary-molars-after-pre-treatment-with-various-dentin-bio-modifiers-an-in-vitro-study
#16
JOURNAL ARTICLE
Saima Sultan, Seema Chaudhary, T R Chaitra, Naveen Manuja, Sinha Ashish Amit, Mamata Iranna Hebbal, Alhanoof Aldegheishem, Selma A Saadaldin, Elzahraa Eldwakhly, Amal Ali, Mai Soliman
Dentine adhesives have demonstrated great success with permanent teeth. Though the results in primary teeth are not well documented, some studies have demonstrated lower values of bond strength in primary teeth than those found in permanent teeth. The aim of this study was to compare and evaluate the effect of grape seed extract (6.5%) (Herbal Bio Solutions, Delhi, India), glutaraldehyde (5%) (Loba Chemie PVT. LTD., Mumbai), hesperidin (0.5%) (Herbal Bio Solutions, Delhi, India), and casein phosphopeptide-amorphous calcium phosphate (tooth mousse) (GC Corporation, Alsip, IL, USA) on the shear bond strength of dentine of primary teeth and to evaluate the resin tags at the resin tooth interface...
February 11, 2024: Journal of Functional Biomaterials
https://read.qxmd.com/read/38391475/polydopamine-blending-increases-human-cell-proliferation-in-gelatin-xanthan-gum-3d-printed-hydrogel
#17
JOURNAL ARTICLE
Preetham Yerra, Mario Migliario, Sarah Gino, Maurizio Sabbatini, Monica Bignotto, Marco Invernizzi, Filippo Renò
BACKGROUND: Gelatin-xanthan gum (Gel-Xnt) hydrogel has been previously modified to improve its printability; now, to increase its ability for use as cell-laden 3D scaffolds (bioink), polydopamine (PDA), a biocompatible, antibacterial, adhesive, and antioxidant mussel-inspired biopolymer, has been added (1-3% v / v ) to hydrogel. METHODS: Control (CT) and PDA-blended hydrogels were used to print 1 cm2 grids. The hydrogels' printability, moisture, swelling, hydrolysis, and porosity were tested after glutaraldehyde (GTA) crosslinking, while biocompatibility was tested using primary human-derived skin fibroblasts and spontaneously immortalized human keratinocytes (HaCaT)...
February 14, 2024: Gels
https://read.qxmd.com/read/38386138/modification-of-thermal-and-electrical-characteristics-of-hybrid-polymer-nanocomposites-through-gamma-irradiation-for-advanced-applications
#18
JOURNAL ARTICLE
C M Kavitha, K M Eshwarappa, Shivakumar Jagadish Shetty, S C Gurumurthy, Srivathsava Surabhi, T Niranjana Prabhu, Jong-Ryul Jeong, D V Morales
In this article, we present a straightforward in-situ approach for producing Ag NPs incorporated in graphene oxide (GO) blended with glutaraldehyde (GA) cross-linked polyvinyl alcohol (PVA) matrix. Samples are γ-irradiated by doses of 2, 5, and 10 kGy and in comparison with the pristine films, the thermal conductivity ('k') and effusivity are measured. 'k' decreases with irradiation doses up to 5 kGy and further increase in the dosage results increase in 'k'. We performed FDTD modeling to verify the effect of polarization and periodicity on the absorptivity and emissivity spectra that are correlated to the 'k' and effusivity, empirically...
February 22, 2024: Discov Nano
https://read.qxmd.com/read/38372836/rapid-formation-of-carbon-nanotubes-natural-rubber-films-cured-with-glutaraldehyde-for-reducing-percolation-threshold-concentration
#19
JOURNAL ARTICLE
Rawiporn Promsung, Arthittaya Chuaybamrung, Antonia Georgopoulou, Frank Clemens, Yeampon Nakaramontri, Jobish Johns, Nussana Lehman, Ladawan Songtipya, Ekwipoo Kalkornsurapranee
Carbon nanotubes (CNTs) filled natural rubber (NR) composites with various CNT contents at 0, 1, 2, 3, 4 and 5 phr were prepared by latex mixing method using glutaraldehyde as curing agent. This work aims to improve the electrical and mechanical properties of CNT filled NR vulcanizates. The CNT dispersion of NR composites was clarified using dispersion grader, optical microscopy and scanning electron microscopy. The electrical properties of NR composites in the existing of CNT networks were studied by following the well-known percolation theory...
February 19, 2024: Discov Nano
https://read.qxmd.com/read/38349840/occluding-efficiency-of-different-desensitizing-agents-and-er-cr-ysgg-laser-on-dentin-tubules
#20
JOURNAL ARTICLE
Y S Uslu, N Donmez, A S Gungor, T T Akalin, H Ulukapi
PURPOSE: This study aimed to evaluate the effects of two desensitizers and the Er,Cr:YSGG laser on human dentin tubules, applied alone or in combination. METHODS: Ninety-six dentin specimens were obtained from extracted third molars and divided into six groups: Group 1: no-treatment (Control); Group 2: nano-hydroxyapatite desensitizer (NhapD); Group 3: NhapD+Er,Cr:YSGG laser (L); Group 4: Er,Cr:YSGG laser (L); Group 5: glutaraldehyde desensitizer (GD); and Group 6: GD+L, respectively...
February 13, 2024: Operative Dentistry
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