Search results

The basic host structure Ca8Zn (SiO4)4Cl2 is a good candidate for green, yellow and red emission by using various sensitizers as Eu, Eu-Mn, Ce, etc.
Tews, Structure and dynamics of perovskite-type crystals, Phys.
Jing, Chemistry and Properties of Nanocrystals of Different Shapes, Mater.
Liu, A Review of Li-Ion Cell Chemistries and their Potential use in Hybrid Electric Vehicles, J.

Development and characterisation of phenolic resin based liquid silicon infiltrated SiC/SiC composites with SiNx fibre coating Bernd Mainzer1,a *, Martin Frieß1,b, Kristina Roder2,c, Daisy Nestler2,d, Daniel Wett2,e, Lydia Wöckel3,f, Thomas Ebert3,g, Guntram Wagner2,h, Stefan Spange3,i and Dietmar Koch1,j 1Institute of Structures and Design, German Aerospace Center (DLR), Pfaffenwaldring 38-40, 70569 Stuttgart, Germany 2Chair of Composite Materials, Technische Universität Chemnitz, 09107 Chemnitz, Germany 3Chair of Polymer Chemistry, Technische Universität Chemnitz, 09107 Chemnitz, Germany abernd.mainzer@dlr.de, bmartin.friess@dlr.de, ckristina.roder@mb.tu-chemnitz.de, ddaisy.nestler@mb.tu-chemnitz.de, edaniel.wett@mb.tu-chemnitz.de, f lydia.woeckel@chemie.tu-chemnitz.de, gthomas.ebert@chemie.tu-chemnitz.de, hguntram.wagner@mb.tu-chemnitz.de, istefan.spange@chemie.tu-chemnitz.de, jdietmar.koch@dlr.de Keywords: Ceramic Matrix Composites, SiC/SiC, Liquid Silicon Infiltration
Introduction In a mutual project of the German Aerospace Center (DLR) with the Institute of Materials Science and Engineering as well as the Institute of Chemistry of the Technische Universität Chemnitz novel carbon precursors and a continuous fibre coating are developed for SiC/SiC composites.
The shrinkage evolved in a foam like structure with pores in a range of 1 to 6 µm and a certain amount of closed porosity (Fig. 4).

Effect of Thermal Treatment on Physico-Chemical Properties of White Mineral Trioxide Aggregate Synthesized from Limestone Precipitate Calcium Carbonate Ahmad Bikharudin1,a*, Sutarno Sutarno1,b, Yuichi Kamiya2,c, Nuryono Nuryono1,d* 1Department of Chemistry, Faculty of Mathematics and Natural Science, Universitas Gadjah Mada, Sekip Utara, Bulaksumur, Yogyakarta 555281, Indonesia. 2Graduate School of Environmental Science, Faculty of Environmental Earth Science, Hokkaido University, Sapporo 060-0810, Japan aahmad_bikharudin@mail.ugm.ac.id, bsutarno@ugm.ac.id, ckamiya@ees.hokudai.ac.jp, dnuryono_mipa@ugm.ac.id Keywords: Thermal Treatment, WMTA, PCC, In vitro.
The structure of WMTA was characterized by X-ray diffraction analysis (XRD, Shimadzu XRD-7000, Japan) with Cu-K radiation (𝜆= 1.54060 Å).
The release of calcium ions depends on several factors, such as the shape of the structure and mineral particles in a material.
P.C., Lea’s Chemistry of Cement and Concrete, 4th ed., Elsevier, Oxford, UK, 2004

Removal of Pb(II) Ion from Aqueous Solution Using Dithizone-Immobilized Natural Bentonite Mudasir Mudasira,*, Febbi Rahmayunib, Sri Sudionoc 1Department of Chemistry, Universitas Gadjah Mada, Yogyakarta 55281, Indonesia amudasir@ugm.ac.id, bfhebby08@gmail.com, cs_sudiono@yahoo.com Keywords: Natural bentonite, Immobilization, dithizone, adsorption, and Pb(II) ion.
The sharp band exhibits at 1033 cm-¹ shows the stretching vibrations of Si─O and Si─O─Si from tetrahedral sheets which are characteristic of the silicate structure and the presence of band absorption at 532 cm-¹ and 470 cm-¹ indicates the existence of the Si─O─Al (octahedral) vibration and Si─O─Si vibration [12].
Based on the results of characterization using FTIR and XRD, it can be concluded that the immobilization of dithizone does not change the functional groups of dithizone and does not damage the crystallinity of the structure of the adsorbent.
W., Physical Chemistry of Surface, Fifth Edition, John Wiley and Sons Inc., New York, 1990.

In a three-dimensional structure, crystals have cavities that are related to each other.
These filter media effectively retain the contaminants inside their structure, producing cleaner water upon exiting the filter media [10].
Nargis., “Status of multielement in the water of the river Buriganga, Bangladesh: Aquatic chemistry of metal ions in polluted river water,” Emerg Contam, vol. 7, pp. 99–115, Jan. 2021, doi: 10.1016/J.EMCON.2021.03.001
Pandya, “The Physical and Chemical Examination Of Water,” The Chemistry and Bacteriology of Public Health, pp. 10–34, Jan. 2013, doi: 10.1016/B978-1-4831-6805-0.50007-1

Blocking Effect of HOCl on Adhesion of Marine Microbes Liu Huoan1,Chen Shuangkou2* College of Chemistry and Chem-engineering, Chongqing University of Science and Technology Chongqing 401331, P.R.
Adhesion of the mussles causes marine fouling [8], reduced navigation speed of ships, increased fuel oil usage, corrosion and damage of numerous underwater structures, increased weights of buoyages and seafaring devices, loss of maneuverability of equipment mobile parts, and plugging of the underwater pipelines.
The photo-catalytic effect facilitated the titanium dioxide to attach to bacterial outer membrane, penetrate it and damage its structure, thereby killing the bacteria by decomposition.
[13] Chen Shuangkou, Wang Bochu，Zhou Taigang, “Theoretical study of the oxidizing mechanism for the reaction of HClO and adhesive unit DOPA in the mussel”, Computer and Applied Chemistry, vol. 26, no. 7, pp. 917-920, July 2009

Tthe geological structure Huanglong valley is in the junction of three tectonic units: Yangzi quasi platform, Songpan - Ganzi fold system and Qinling Mountains geosyncline fold system[1].
Results and discussion Temporal variations of the spring chemistry.
Huanglong spring water temperature Stability may reflect that geothermal activity is year-round stable, while perennially stable water chemistry in Huanglong spring also shows the impact of CO2 partial pressure is relatively stable in the deep of Honglong spring.
There is a complex tectonic movement in the Huanglong valley which is developing nearly EW trending linear compact anticlines, synclines and a plurality of thrust fault structure[2].

Furthermore, abundant microcapillary-like structures were observed which endothelial cells self-assembled into branches and net-like structures.
After 5 days culture, we could observe the microcapillary-like structures only in co-culture conditions (Fig. 2c).
Previous studies also show that direct contact with osteoblastic cells and endothelial cells formed several vessel-like angiogenic structures [4, 5].
Around the clusters, cells with microcapillary-like structure were localized as shown by arrowheads (Fig. 4c).
On the other hand, stimulation of HUVECs by direct contact with MG-63 induced the formation of microcapillary-like structures.

For an efficient utilization of the sunlight, it is necessary to design the eletronic band structures of the titanates structures to get absorption of visible light.
The crystal structures of samples were analyzed by X-ray diffraction (XRD) collected on a X-ray diffractometer (Shimadzu, Labx–XRD 6000) using Cu-Ka1 radiation.
The XRD pattern of the nanoribbons ion exchanged with Sn2+ indicated that there was a change in the crystalline structure of the NRTi.
The influence of the elongated structures (NRTi) in the dye degradation is bigger than the surface particles.
This can be justified by its structure, pore size (Na-NRTi/P-25 = 27 nm, Sn-NRTi/P-25 = 3.4 nm, Na-NRTi/anatase = 3.4 nm and Sn-NRTi/anatase = 3.4 nm) and surface area.

Research will be used description the solid content etc. of polymerization process used measure weight、viscosity etc., and analysis of particle structure and shape by TEM, SEM, analysis the surface properties of particles by FTIR, and ascertain by measuring adhesion properties of different emulsion on the same substrate by strength capability.
In the process of preparation, through chemical methods for chemical modification of soybean protein is to improve the structure and properties of material surface, adjust the material use of an important step.
After MATS system to join the modified soy protein, and then slowly adding acrylate monomer, monomer adsorbed on the surface of soy protein, free radical polymerization occurs to form a similar core-shell structure.
Comparison of images in Figure 6 can be seen, with water as solvent acrylic modified soy protein and increased affinity for particles, soy protein particles and acrylic particles are blended to form a homogeneous structure is similar.
The modified mechanical properties of the composite emulsion is superior to the unmodified composite emulsion. 2) By infrared spectroscopy found that soy protein modification, MATS and soybean protein surface - OH happening chemistry,, resulting in a new Si-O-C bond. 3) By SEM can be found through the modified soy protein - acrylate latex emulsion than the unmodified composite has better interface characteristics and affinity with water for solvent, the modified soybean protein composite latex interface - acrylates xylene as solvent with superior affinity of modified soybean protein composite latex - acrylates. 4) Through TEM can be found that affinity of modified soybean protein and acrylate particles increases will be increased, the water affinity modified soybean protein composite latex modified than xylene soybean protein composite latex easier to form a homogeneous structure.