Search results: 8,286 results (approx.)

1. Removal of calcium ions from aqueous solution by bovine serum albumin (BSA)-modified nanofiber membrane: dynamic adsorption performance and breakthrough analysis.

The presence of calcium ion (Ca2+) in process streams has always been a challenge because of its impact to the heat transfer efficiency of process equipment. Polyacrylonitrile (PAN) nanofiber membrane was selected as the basic matrix in this study owing to its strong mechanical strength and...

Author(s) : Lee PeiXuan; Liu BingLan; Show PauLoke; Ooi ChienWei; Chai WaiSiong; Munawaroh, H. S. H.; Chang YuKaung

Publisher : Elsevier Ltd, Oxford, UK

Journal article : Biochemical Engineering Journal 2021 Vol.171

2. The structural and functional characterization of Malus domestica double bond reductase MdDBR provides insights towards the identification of its substrates.

In this study we describe the crystal structures of the apoform, the binary and the ternary complexes of a double bond reductase from Malus domestica L. (MdDBR) and explore a range of potential substrates. The overall fold of MdDBR is similar to that of the medium chain...

Author(s) : Caliandro, R.; Polsinelli, I.; Demitri, N.; Musiani, F.; Martens, S.; Benini, S.

Publisher : Elsevier Ltd, Oxford, UK

Journal article : International Journal of Biological Macromolecules 2021 Vol.171 pp.89-99

3. Oxidative Pictet-Spengler cyclisations through acceptorless iridium-catalysed dehydrogenation of tertiary amines.

The valuable tetrahydro-β- and γ-carboline skeleta can be accessed through Pictet-Spengler cyclisation initiated by acceptorless dehydrogenation of saturated cyclic amines. The substrate scope for the β-isomers is found to be somewhat limited, but access to the γ-isomers through the more reactive...

Author(s) : Cooksey, J. P.; Saidi, O.; Williams, J. M. J.; Blacker, A. J.; Marsden, S. P.

Publisher : Elsevier Ltd, Oxford, UK

Journal article : Tetrahedron 2021 Vol.78

4. A highly selective colorimetric and fluorescent probe for Cu2+ based diarylethene with a diaminomaleonitrile unit.

A novel photochromic diarylethene derivative containing a diaminomaleonitrile unit (1O) was synthesized and its colorimetric and fluorescent turn-on sensing of Cu2+ in acetonitrile solution was demonstrated. Both of its open- and closed-loop isomers (1O and 1C) were highly selective for Cu2+ with...

Author(s) : Liu XuTang; Liu HongLiang; Tang XuGang; Liu Gang; Pu ShouZhi

Publisher : Elsevier Ltd, Oxford, UK

Journal article : Tetrahedron 2021 Vol.78

5. Rubisco: structural and functional aspects with special reference to catalytic imperfection.

Carbon fixation is one of the most fundamental aspects of plant physiology. It is carried out by RuBisCO (ribulose bisphosphate carboxylase), an enzyme that also catalyzes oxygenation reaction yielding 'toxic' intermediates. At optimal conditions, RuBisCO preferentially incorporates inorganic...

Author(s) : Ammir Hassan; Shamiya Hassan; Nasir, M. A.

Publisher : Indian Botanical Society, Meerut, India

Journal article : Journal of the Indian Botanical Society 2021 Vol.101 No.1 pp.90-96 ref.36

6. Geometric definition of druse crystal in plant cells.

In this study, we determined that micromorphological structures of some plant crystal have geometric structures and mathematical formulas. Plant crystals are the storage of many mineral acid salts (inorganic salts) in many plants, such as chloride, phosphate, carbonate, silicate anhydrides and...

Author(s) : Özdemir, A.; Özdemir, C.

Publisher : Indian Botanical Society, Meerut, India

Journal article : Journal of the Indian Botanical Society 2021 Vol.101 No.1 pp.146-151 ref.25

7. Study on the binding mechanism of thiamethoxam with three model proteins:spectroscopic studies and theoretical simulations.

As a top-selling neonicotinoid insecticide widely used in the field, thiamethoxam is an environmental pollutant because of the accumulation in ecosystem and has also been reported that it has potential risks to the health of mammals even humans. In order to understand the binding mechanism of...

Author(s) : Su Xiao; Wang Leng; Xu YeFei; Dong LiLi; Lu HuiZhe

Publisher : Elsevier, Amsterdam, Netherlands

Journal article : Ecotoxicology and Environmental Safety 2021 Vol.207 ref.49

8. The quest for reusability: the facile and stable immobilization of papain on cysteine functionalized iron oxide nanoparticles activated glass surface.

The study displays the immobilization of papain on cysteine functionalized iron oxide nanoparticle coated glass beads. Glass beads were treated with (3-mercaptopropyl) trimethoxysilane and iron oxide nanoparticles capped with cysteine, to create a layer of cysteine on the surface of glass bead....

Author(s) : Shraddha Chauhan; Upadhyay, L. S. B.

Publisher : National Institute of Science Communication and Information Resources, CSIR, New Delhi, India

Journal article : Indian Journal of Biochemistry & Biophysics 2021 Vol.58 No.2 pp.141-147 ref.21

9. Modification of structured bio-carbon derived from spongin-based scaffolds with nickel compounds to produce a functional catalyst for reduction and oxidation reactions: potential for use in environmental protection.

Three different 3D fibrous-like NiO/Ni(OH)2/Ni-carbonized spongin-based materials were prepared via a simple sorption-reduction method. Depending on the support used, the catalysts were composed of carbon, nickel oxide, nickel hydroxide and zero-valent nickel, with the surface content of the...

Author(s) : Zóltowska, S.; Bielan, Z.; Zembrzuska, J.; Siwinska-Ciesielczyk, K.; Piasecki, A.; Zielinska-Jurek, A.; Jesionowski, T.

Publisher : Elsevier Ltd, Oxford, UK

Journal article : Science of the Total Environment 2021 Vol.794 ref.96

10. One-pot transesterification of non-edible Moringa oleifera oil over a mgo/k2co3/hap catalyst derived from poultry skeletal waste.

A hydroxyapatite (HAp) catalyst support from poultry's bones was derived and then modified with MgO/K2CO3 to generate a heterogeneous catalyst to produce biodiesel from a non-edible Moringa oleifera oil. The catalyst properties were analyzed with SEM, EDX-Map, XRD, FTIR, and N2...

Author(s) : Foroutan, R.; Peighambardoust, S. J.; Mohammadi, R.; Ramavandi, B.; Boffito, D. C.

Publisher : Elsevier, Amsterdam, Netherlands

Journal article : Environmental Technology & Innovation 2021 Vol.21 ref.1

11. Dye-sensitized core-shell NaGdF4:Yb,Er@NaGdF4:Yb,Nd upconversion nanoprobe for determination of H2S.

The core-shell NaGdF4:Yb,Er@NaGdF4:Yb,Nd upconversion nanoparticles (UCNPs) were successfully obtained with the method of co-precipitation, and the water-solubility of UCNPs was improved by the ligand exchange reaction between nitrosyl tetrafluoroborate (NOBF4) and nanoparticles. The IR-783 dye...

Author(s) : Chen HongQi; Wang Wen; Ji ChangChun; Wang Lun

Publisher : Elsevier Ltd, Oxford, UK

Journal article : Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 2021 Vol.248

12. Imidazolyl-benzocoumarins as ratiometric fluorescence probes for biologically extreme acidity.

A rational approach to develop a fluorescent probe for sensing biologically "extreme" acidity (pH < 3) is disclosed. The probe, a push-full type 3-(imidazolyl)benzocoumarin dye, has the lowest pKa = 1.3 among ratiometric probes known so far, which is ascribed due to a unique sensing mechanism....

Author(s) : Kim Hyerim; Sarkar, S.; Nandy, M.; Ahn KyoHan

Publisher : Elsevier Ltd, Oxford, UK

Journal article : Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 2021 Vol.248

13. In-situ thermal phase transition and structural investigation of ferroelectric tetragonal barium titanate nanopowders with pseudo-cubic phase.

Optimization and miniaturization of existing electronic devices require the development of advanced nanostructured materials with high phase and structural purity. Over the past decade, barium titanate (BaTiO3) has attracted considerable attention due to its outstanding ferroelectric and dielectric ...

Author(s) : Kim DongHyun; Lee SeungJun; Theerthagiri, J.; Choi MoonHee; Jung JongSuk; Yu, Y.; Im KwangSeop; Jung HyeonJin; Nam SangYong; Choi MyongYong

Publisher : Elsevier Ltd, Oxford, UK

Journal article : Chemosphere 2021 Vol.283 ref.37

14. Preparation of LiOH through BMED process from lithium-containing solutions: effects of coexisting ions and competition between Na+ and Li+.

Bipolar membrane electrodialysis (BMED) is a promising method to produce LiOH from lithium containing solutions. However, the coexisting ions will significantly affect the current efficiency of preparing LiOH. Herein, the influence of the ion's property on the mass transfer behavior of the BMED was ...

Author(s) : Zhao YouJing; Xiang Xu; Wang Min; Wang HuaiYou; Li Yan; Li JinLi; Yang HongJun

Publisher : Elsevier Ltd, Oxford, UK

Journal article : Desalination 2021 Vol.512

15. Selection of microplastics by nile red staining increases environmental sample throughput by micro-raman spectroscopy.

Nile Red staining enables visual identification and quantification of fluorescent particles as a proxy to microplastics at low cost and high throughput, including those of small sizes (≥2 μm), when preceded by proper natural organic matter removal, but providing no chemical characterization. On the ...

Author(s) : Prata, J. C.; Costa, J. P. da; Fernandes, A. J. S.; Costa, F. M. da; Duarte, A. C.; Rocha-Santos, T.

Publisher : Elsevier Ltd, Oxford, UK

Journal article : Science of the Total Environment 2021 Vol.783

16. Chitosan nanocomposite coatings containing chemically resistant ZnO-SnOx core-shell nanoparticles for photocatalytic antifouling.

Functional nanocomposites with biopolymers and zinc oxide (ZnO) nanoparticles is an emerging application of photocatalysis in antifouling coatings. The reduced chemical stability of ZnO in the acidic media in which chitosan is soluble affects the performance of chitosan nanocomposites in...

Author(s) : Santosh Kumar; Ye Fei; Mazinani, B.; Dobretsov, S.; Dutta, J.

Publisher : MDPI AG, Basel, Switzerland

Journal article : International Journal of Molecular Sciences 2021 Vol.22 No.9 ref.58

17. Two-component waterborne polyurethane modified with terpene derivative-based polysiloxane for coatings via a thiol-ene click reaction.

Waterborne polyurethane has gradually become a focus among researchers due to its low volatile organic emissions and low pollution. However, some problems exist with waterborne polyurethane, such as poor mechanical properties, obvious hydrophilicity and poor heat resistance. Herein, a...

Author(s) : Qian YuehAn; Dong FuHao; Guo LiZhen; Xu Xu; Liu He

Publisher : Elsevier Ltd, Oxford, UK

Journal article : Industrial Crops and Products 2021 Vol.171

18. Inhibition of acetylcholinesterase by coumarin-linked amino acids synthetized via triazole associated with molecule partition coefficient.

A previous study for the identification of acetylcholinesterase (AChE) inhibitors demonstrated that the hybrid between tyrosol, the 1,2,3-triazole nucleus, and the coumarin group, namely 7-({1-[2-(4-hydroxyphenyl)ethyl]-1H-1,2,3-triazol-4-yl}methoxy)-4-methyl-2H-chromen-2-one (10), has a high...

Author(s) : Sousa, B. L. de; Leite, J. P. V.; Mendes, T. A. O.; Varejão, E. V. V.; Chaves, A. C. S.; Silva, J. G. da; Agrizzi, A. P.; Ferreira, P. G.; Pilau, E. J.; Silva, E.; Santos, M. H. dos

Publisher : Sociedade Brasileira de Quimica, São Paulo, Brazil

Journal article : Journal of the Brazilian Chemical Society 2021 Vol.32 No.3 pp.652-664 ref.64

19. Experimental and theoretical approach to probe the aquatic speciation of transuranic (neptunyl) ion in presence of two omnipresent organic moieties.

Pyrazines are omnipresent in nature and have their occurrence in plants, microbes, food supplies, marine arenas. The present studies aimed at aquatic speciation of the neptunyl ion (NpO2+) with two pyrazine compounds namely pyrazine monocarboxylic acid (PMC) and pyrazine dicarboxylic acid (PDC)....

Author(s) : Dumpala, R. M. R.; Ashutosh Srivastava; Neetika Rawat

Publisher : Elsevier Ltd, Oxford, UK

Journal article : Chemosphere 2021 Vol.273

20. A review of clay based photocatalysts: role of phyllosilicate mineral in interfacial assembly, microstructure control and performance regulation.

Over the past decades, inspired by the outstanding properties of clay minerals such as abundance, low-cost, environmental benignity, high stability, and regularly arranged silica-alumina framework, researchers put much efforts on the interface assembly and surface modification of natural minerals...

Author(s) : Li ChunQuan; Zhu NingYuan; Yang ShanShan; He XuWen; Zheng ShuiLin; Sun ZhiMing; Dionysiou, D. D.

Publisher : Elsevier Ltd, Oxford, UK

Journal article : Chemosphere 2021 Vol.273

21. Availability of metals to DGT devices with different configurations. The case of sequential Ni complexation.

The analytical technique DGT (Diffusive Gradients in Thin-films) is able to gain access to a wealth of information by carefully interpreting accumulation data from passive samplers with different configurations (i.e. different thicknesses of its constituent layers). A set of DGT devices were...

Author(s) : Sans-Duñó, J.; Cecilia, J.; Galceran, J.; Puy, J.

Publisher : Elsevier Ltd, Oxford, UK

Journal article : Science of the Total Environment 2021 Vol.779

22. Numerical study of building pressure cycling to generate sub-foundation aerobic barrier for mitigating petroleum vapor intrusion.

In this study, the role of building pressure cycling (BPC) method in generating a subslab aerobic barrier at petroleum contaminated sites was examined numerically. The numerical model was first validated with field observations and then used to simulate BPC applications in petroleum vapor intrusion ...

Author(s) : Liu YanQiu; Verginelli, I.; Yao YiJun

Publisher : Elsevier Ltd, Oxford, UK

Journal article : Science of the Total Environment 2021 Vol.779

23. Gum Arabic as an environmentally sustainable polymeric anticorrosive material: recent progresses and future opportunities.

Gum Arabic (GA) is a plant exudate, consisting of glycoproteins (proteins with carbohydrate co-factor or prosthetic group) and polysaccharides mainly consisting of galactose and arabinose. Because of its polymeric nature and tendency to dissolve in water, GA is widely used as anticorrosive...

Author(s) : Chandrabhan Verma; Quraishi, M. A.

Publisher : Elsevier Ltd, Oxford, UK

Journal article : International Journal of Biological Macromolecules 2021 Vol.184 pp.118-134

24. Recovery of rare earth elements (Lu, Y) by adsorption using functionalized SBA-15 and MIL-101 (Cr).

Due to increasing application in the green energy sector, rare earth elements (REEs) have become a precious commodity in the international market. The REEs, Yttrium (Y) and Lutetium (Lu) are used as catalysts in wide array of industries. SBA-15 modified with 1,4-phthaloyl...

Author(s) : Ryu, S.; Fonseka, C.; Naidu, G.; Loganathan, P.; Moon Hee; Kandasamy, J.; Vigneswaran, S.

Publisher : Elsevier Ltd, Oxford, UK

Journal article : Chemosphere 2021 Vol.281

25. Engineered nano-foam of tri-metallic (FeCuCo) oxide catalyst for enhanced hydrogen generation via NaBH4 hydrolysis.

Catalytic hydrolysis of sodium borohydride can potentially be considered as a convenient and safe method to generate hydrogen, an environmentally clean and sustainable fuel for the future. The present effort establishes the development of FeCuCo tri-metallic oxide catalyst by a simple, single-step...

Author(s) : Patil, K. N.; Divya Prasad; Bhagyashree; Manoorkar, V. K.; Nabgan, W.; Nagaraja, B. M.; Jadhav, A. H.

Publisher : Elsevier Ltd, Oxford, UK

Journal article; Conference paper : Chemosphere 2021 Vol.281