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Online since: September 2013
Authors: You Liang Liu, Chang Chun Cao, Liang Liang Tan, Jie Cheng
Combined the mountain, river system, town and natural environment outside to form special morphological structure as the ancients choice the place to build the wall.
In the ancient city site in the clever use of the surrounding natural environment, the mountain, water, city organic combination, formed a city unique morphological structure.
In the county, the space expand outwards constantly, the population density increased, and the urban construction has changed dramatically, especially the drainage structure has changed greatly.
Integrated modelling of priority pollutants in stormwater systems[J].Physics and Chemistry of the Earth, Parts A/B/C, 2012,42:42-51
In the ancient city site in the clever use of the surrounding natural environment, the mountain, water, city organic combination, formed a city unique morphological structure.
In the county, the space expand outwards constantly, the population density increased, and the urban construction has changed dramatically, especially the drainage structure has changed greatly.
Integrated modelling of priority pollutants in stormwater systems[J].Physics and Chemistry of the Earth, Parts A/B/C, 2012,42:42-51
Online since: July 2006
Authors: Miha Drofenik, V. Dondur, Boško Grbić, Nenad Radić
Drofenik2,b
1
Belgrade University, Faculty of Physical Chemistry and IHTM, Studentski trg 12, Belgrade, SCG
2
Jožef Stefan Institute, Jamova 39, Ljubljana, Slovenija
a
edondur@ffh.bg.ac.yu, bmiha.drofenik@ijs.si
Keywords: CO Adsorption, Ferrite, Oxidation, Supported Gold Catalysts.
Results and Discussion According to the XRPD data, the spinel structure is the only phase present in powders with an MnxZn1-xFe2O4 composition (x=0.2-0.8).
The number and the strength of sites for water adsorption depend on the Mn/Zn ratio in the ferrite structure.
The highest value of magnetization has the sample with equal content of Mn and Zn in the spinel structure.
Results and Discussion According to the XRPD data, the spinel structure is the only phase present in powders with an MnxZn1-xFe2O4 composition (x=0.2-0.8).
The number and the strength of sites for water adsorption depend on the Mn/Zn ratio in the ferrite structure.
The highest value of magnetization has the sample with equal content of Mn and Zn in the spinel structure.
Online since: March 2016
Authors: Xin Fu Ma, Hai Xiang Ma, Yao Lu, Qing Quan Guo
In addition, there are a few reports on the preparation of anisotropic AuNPs, such as 1-D structure of gold nanorods[6-8] and nanowires[9-11], 2-D structure of gold nanoplates[12-15].
Therefore, The integration of the principles of green chemistry to nanotechnology straightforward syntheses of nanoparticles is a current requirement.
Cheng et al [28] also observed similar aggregated gold structures in their study on the effect of KI on the morphology of AuNPs prepared by the citrate reduction method, the results further proved that halide ions have a dramatic formation of nanoparticle superstructures.
Therefore, The integration of the principles of green chemistry to nanotechnology straightforward syntheses of nanoparticles is a current requirement.
Cheng et al [28] also observed similar aggregated gold structures in their study on the effect of KI on the morphology of AuNPs prepared by the citrate reduction method, the results further proved that halide ions have a dramatic formation of nanoparticle superstructures.
Online since: October 2018
Authors: De Hong Huo, Islam Shyha, Fawad Inam, Guo Yu Fu, Bao Le, Mohd Shahneel Saharudin, Jia Cheng Wei
Micro-Machining of Nano-Polymer Composites Reinforced with Graphene and Nano-Clay Fillers
Islam Shyha1,* Guoyu Fu2, Dehong Huo2, Bao Le1, Fawad Inam1,
Mohd Shahneel Saharudin3, Jiacheng Wei1,4
1Mechanical and Construction Engineering Department, Northumbria University at Newcastle, Newcastle upon Tyne NE1 8ST, UK
2Mechanical Engineering, School of Engineering, Newcastle University, Newcastle upon Tyne NE1 7RU, UK
3Universiti Kuala Lumpur Institute of Product Design and Manufacturing (UniKL IPROM), 56100 Cheras, Kuala Lumpur, Malaysia.
4Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, 030001 Taiyuan, China
*Corresponding author: islam.shyha@northumbria.ac.uk
Keywords: nanomaterials, micro-machining, graphene, nano-clay
Abstract.
Halloysite nano-clays are chemically similar to kaolin, but have hollow microtubular structures with a high aspect ratio.
Cutting forces when micromachining PC reinforced with various nano-fillers [19] Experimental Work Two types of nano-structured composite materials are used in this research: graphene/epoxy and nano-clay/polyester.
A graphene force sensor with pressure-amplifying structure.
Halloysite nano-clays are chemically similar to kaolin, but have hollow microtubular structures with a high aspect ratio.
Cutting forces when micromachining PC reinforced with various nano-fillers [19] Experimental Work Two types of nano-structured composite materials are used in this research: graphene/epoxy and nano-clay/polyester.
A graphene force sensor with pressure-amplifying structure.
Online since: April 2021
Authors: Rong Liu, Peng Qing, Ge Jian Zhu
PLGA Nanomaterials
The structure and characteristics of PLGA.
In structure, on the basis of polylactic acid, adding flexible glycolic acid chain segment, so that one methyl is missing compared to polylactic acid chain segment, consequently enhancing the hydrophilicity of PLA.
The special structure and surface charge of micro / nanoparticles have high gene transfer efficiency, which can mediate the integration of foreign genes in the chromosomal DNA of cells, thereby obtaining long-term stable expression of genes.
By using carbodiimide/N-hydroxysuccinimide chemistry, Masumeh Zamanlu could attache PEG to PLGA, and then uses a single emulsification solvent diffusion / evaporation technique to formulate tPA-containing PEG-PLGA NPs.
In structure, on the basis of polylactic acid, adding flexible glycolic acid chain segment, so that one methyl is missing compared to polylactic acid chain segment, consequently enhancing the hydrophilicity of PLA.
The special structure and surface charge of micro / nanoparticles have high gene transfer efficiency, which can mediate the integration of foreign genes in the chromosomal DNA of cells, thereby obtaining long-term stable expression of genes.
By using carbodiimide/N-hydroxysuccinimide chemistry, Masumeh Zamanlu could attache PEG to PLGA, and then uses a single emulsification solvent diffusion / evaporation technique to formulate tPA-containing PEG-PLGA NPs.
Morphological, Thermal and Mechanical Properties of Poly(Lactic Acid)/Cellulose/ Nano-Clay Composite
Online since: August 2020
Authors: Suttinun Phongtamrug, Sirisart Ouajai
Morphological, Thermal and Mechanical Properties of
Poly(Lactic Acid)/Cellulose/ Nano-Clay Composite
Sirisart Ouajai1,2,a* and Suttinun Phongtamrug1,3,b
1Department of Industrial Chemistry, Faculty of Applied Science,
King Mongkut’s University of Technology North Bangkok, Bangkok 10800, Thailand
2Polymer Research Center, King Mongkut’s University of Technology North Bangkok,
Bangkok 10800, Thailand
3Integrated Nanoscience Research Center,
King Mongkut’s University of Technology North Bangkok, Bangkok 10800, Thailand
asirisart.o@sci.kmutnb.ac.th, bsuttinun.p@sci.kmutnb.ac.th
Keywords: Poly(lactic acid), Cellulose, Nano-clay, Composite
Abstract.
Fig. 1 Chemical structure of 3-Aminopropyltriethoxysilane.
Dubois, Polylactide/montmorillonite nanocomposites and microcomposites prepared by melt blending: structure and some physical properties, J.
Oksman, Structure and thermal properties of poly (lactic acid)/cellulose whiskers nanocomposite materials, Compos.
Fig. 1 Chemical structure of 3-Aminopropyltriethoxysilane.
Dubois, Polylactide/montmorillonite nanocomposites and microcomposites prepared by melt blending: structure and some physical properties, J.
Oksman, Structure and thermal properties of poly (lactic acid)/cellulose whiskers nanocomposite materials, Compos.
Online since: December 2016
Authors: Andrei Shishkin, Hafida Hentit, Djillali Reda Merouani, Abdelkader Iddou, Jean Claude Jumas, Hakim Aguedal
Improvement of the Sorption Characteristics of Diatomite
by Heat Treatment
Hakim Aguedal1, a *, Hafida Hentit1, b, Djillali Reda Merouani2, c,
Abdelkader Iddou1, d, Andrei Shishkin3, e, Jean Claude Jumas4, f
1Laboratoire de Valorisation des Matériaux, Département de Génie des Procédés, Faculté des Sciences et de la Technologie, Université Abdelhamid Ibn Badis – Mostaganem, Algérie.
2Laboratoire Structure Elaboration et Application des Matériaux, Département de Chimie,
Faculté des Sciences Exactes, Université Abdelhamid Ibn Badis - Mostaganem, Algéie.
3Rudolfs Cimdins Riga Biomaterials Innovations and Development Centre of RTU, Institute of General Chemical Engineering, Faculty of Materials Science and Applied Chemistry,
Riga Technical University, Pulka 3, Riga, LV-1007, Latvia.
4ICG–AIME–UMR 5253, Université of Montpellier 2, Place Eugène Bataillon CC 1502,
34095 Montpellier Cedex 05, France.
Scanning electron microscopy observations (Fig. 1) revealed that the skeleton of diatoms has not changed and still showed the original structure after treatment at 300°C.
Based on the XRD pattern of Dt-100 (Fig. 1.) an amorphous structure was observed in the section 18° and 30° of 2-theta but it’s represented with a small peak centered at 2 θ = 22° which could be identified as hydrated amorphous silica biogenic [11].
Scanning electron microscopy observations (Fig. 1) revealed that the skeleton of diatoms has not changed and still showed the original structure after treatment at 300°C.
Based on the XRD pattern of Dt-100 (Fig. 1.) an amorphous structure was observed in the section 18° and 30° of 2-theta but it’s represented with a small peak centered at 2 θ = 22° which could be identified as hydrated amorphous silica biogenic [11].
Online since: August 2020
Authors: Worawut Kriangkrai, Siriporn Taokaew, Nattanich Wattanaphraya
b
a
Fig. 2 Extract of Black ginger rhizomes of Kaempferia parviflora used in this study (a) and chemical structure of methoxyflavones, the main bioactive component in the black ginger (b) [7]
F7, F9-F12
F5-F8
F1-F4
a
b
Fig. 3 Loss tangent (tan d) versus time (a) and strain-dependent changes of storage and loss moduli (G’ and G”) (b) of the 12 formulations (F1-F12).
This behavior was caused by the formation of a crosslinked gel structure that might be spontaneously progressing [11].
On the other hand, decreased modulus at higher strain indicated rupture of the gel structure, similar to the HPC case (F9).
Deng, Kaempferia parviflora and its methoxyflavones: Chemistry and biological activities, Evid.
This behavior was caused by the formation of a crosslinked gel structure that might be spontaneously progressing [11].
On the other hand, decreased modulus at higher strain indicated rupture of the gel structure, similar to the HPC case (F9).
Deng, Kaempferia parviflora and its methoxyflavones: Chemistry and biological activities, Evid.
Online since: March 2022
Authors: Worranan Rangsimawong, Monrudee Sukma, Phuvamin Suriyaamporn
Design and Investigation of Optimal Dissolving Polymeric Microneedles for Ocular Application by Using Three-Level Factorial Design
Phuvamin Suriyaamporn1,a, Monrudee Sukma1,b
and Worranan Rangsimawong2,c*
1Department of Pharmaceutical Technology, Faculty of Pharmacy, Silpakorn University,
Nakhon Pathom 73000, Thailand
2Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmaceutical Sciences,
Ubon Ratchathani University, Ubon Ratchathani 34190, Thailand
asuriyaamporn_p@su.ac.th, bsukma_m@su.ac.th, crangsimawong.w@gmail.com
Keywords: Dissolving polymeric microneedles, Ocular application, Three-level factorial design
Abstract.
Design of experiments (DoE) is a structured and organized method for prescribing the relationships between independent variables (input factors) affecting one or more dependent variables (output responses), through the mathematical models.
Moreover, the structure of cornea tissue had highly ordered parallel fibrils that helped the cornea tissue be highly resistant to deformation when insertion force was increased.
The thickness and elasticity of ocular tissue structure affected MNs application.
Design of experiments (DoE) is a structured and organized method for prescribing the relationships between independent variables (input factors) affecting one or more dependent variables (output responses), through the mathematical models.
Moreover, the structure of cornea tissue had highly ordered parallel fibrils that helped the cornea tissue be highly resistant to deformation when insertion force was increased.
The thickness and elasticity of ocular tissue structure affected MNs application.
Online since: July 2012
Authors: Xi Yao Teng, Hong Bi, Jun Sun
Preparation of r-GO/Carbon Sphere/PANI Composites with a High Supercapacity
Jun Suna, Xi-Yao Tengb, Hong Bic
College of Chemistry and Chemical Engineering, Anhui University, Hefei 230039, P.R.
This novel structure can reduce the ionic diffusion path, facilitate ionic motion to the inner part and thus improve the electrochemical performance of the electrode materials.
That is because the PANI thorns on the surface of CS could interconnect with each other provided by conductive r-GO film, thus this conducting three-dimensional structure enables fast charge and ion transportation [2].
Li, Colloidal CSs and their core/shell structures with noble-metal nanoparticles.
This novel structure can reduce the ionic diffusion path, facilitate ionic motion to the inner part and thus improve the electrochemical performance of the electrode materials.
That is because the PANI thorns on the surface of CS could interconnect with each other provided by conductive r-GO film, thus this conducting three-dimensional structure enables fast charge and ion transportation [2].
Li, Colloidal CSs and their core/shell structures with noble-metal nanoparticles.