Search Options

Sort by:

Sort search results by

Publication Type:

Publication Type filter

Open access:

Publication Date:

Periodicals:

Periodicals filter

Search results

Online since: July 2022
Authors: Roto Roto, Adhitasari Suratman, Jihan Arlia Putri
Adsorption of Coomassie Brilliant Blue by Alginate-Chitosan Nanoparticles Jihan Arlia Putria, Adhitasari Suratmanb*, Rotoc Department of Chemistry, Faculty of Mathematics and Natural Science, Universitas Gadjah Mada, Yogyakarta, Indonesia.
Nanoparticles offer significant improvements with their extremely high specific surface area, short intraparticle diffusions distance, and tunable pore size and surface chemistry [11].
Furthermore, the high surface energy and size-dependent surface structure at the nanoscale may create highly active adsorption sites [11].
Online since: August 2023
Authors: Tran Quoc Toan, Nguyen Ngoc Quy, Thanh Viet Nguyen, Thi Thu Thuy Dinh, Thi Tuyen Tran, Thi Bich Hoang, Quoc Long Pham, Quyet Chien Nguyen
Chemical Compositions of Essential Oil of Agarwood (Aquilaria crassna) Harvested in Phu Quoc Island, Vietnam Quoc Toan Tran1,2,a, Thi Thu Thuy Dinh1,b, Thi Tuyen Tran1,2,c, Thi Bich Hoang1,d, Quoc Long Pham1,2,e, Quyet Chien Nguyen1,2,f, Ngoc Quy Nguyen 3,g and Thanh Viet Nguyen4,5,h* 1Institute of Natural Products Chemistry, Vietnam Academy of Science and Technology (VAST), Hanoi City, Vietnam 2Graduate University of Science and Technology, Vietnam Academy of Science and Technology (VAST), Hanoi City, Vietnam 3Faculty of Pharmacy, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam 4Faculty of Environmental and Food Engineering, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam 5Institute of Applied Technology and Sustainable Development, Nguyen Tat Thanh University, Ho Chi Minh City 700000, Vietnam atranquoctoan2010@gmail.com; bthuydt03@yahoo.com; ctrantuyeninpc@gmail.com; dbichhoang.inpc@gmail.com; emar.biochem@fpt.vn; fchientc48@yahoo.com; gnnquy@ntt.edu.vn; h
Structure of important sesquiterpene compounds in essential agarwood oil in Phu Quoc island of Vietnam Antibacterial and anti-inflammatory activities have been found in the literature as two prominent properties of essential agarwood oil.
Trieu, Physico-chemical characteristics of Rosmarinus officinalis L. essential oils grown in Lam Dong province, Vietnam, Asian Journal of Chemistry. 31 (2019) 2759–2762
Online since: November 2005
Authors: Yves Bréchet, Gary R. Purdy, Christopher R. Hutchinson, S.V. Subramanian, Hatem Zurob, G. Zhu
We thus expect the high Mn chemistry to be better for retarding static recrystallization under the present conditions.
(d) The optimum design of base chemistry and rolling schedule is to control the strain induced precipitation kinetics to maximize the pinning force, while ensuring adequate solute Nb to prevent the boundary from breaking away from its solute atmosphere.
On Ultra-fine structured steels, E.Essadiqi and J.
Online since: August 2013
Authors: Peng Mou, Dong Xiang, Huan Xiong Xia, Han Zhang
Axisymmetric schematic of the PECVD reactor An axisymmetric structure diagram of a typical PECVD reactor with a wafer was showed in figure 1, which is mainly composed of showerhead, heater and the cylindrical chamber.
The Journal of Physical Chemistry, 1992. 96(17): p. 7063-7072
Weast, R.C., et al., CRC Handbook of Chemistry and Physics 70th edn. 1989
Online since: August 2011
Authors: You Ming Cao, Jian Peng
MOS was produced by Yingkou Weisi chemistry co., LTD.
Fig. 1 Activation Exponential of 5 kinds of coupling agents for MOS The activation exponential indicated that the best effect of suface treatment was KH570, it can be kown by anaylsis of chemical structure for KH570.
The structure of KH570 was shown in Fig. 2.
Fig. 2 The chemical structure of KH570 On the orther hand, the magnesium sulfate whisker absorbed water from external environment, these water molecules were adsorbed onto the surface of whisker and to form hydroxyl group.
When the composite was loaded on the stress, due to almost perfect internal structure of MOS whisker, the whisker acted as a bone-structure, stress was passed from resin to whisker through the interface layer, the whisker resisted some stress, so make the strenght increase.
Online since: July 2011
Authors: Yan Zhang, Xiao Ling Chen, Zheng Ping Fang
It can be interpreted that the char structure formed by ABS-2 is unstable, which can collapse with the increasing temperature and the protective charred layer for polymer will be destroyed.
In Fig. 3(b) and Fig.4(A), the char layer from ABS-2(ABS/APP) shows a thinner char structure with mass of holes for lack of effective char-forming agent.
Whereas the char structure obtained from ABS-3 with the addition of poly(DPA-PDCP) shown in Fig. 3(c) and Fig.4(B) is more compact and strong, and appears to be composed of platelets structure, which would be a more effective barrier.
The char structure of ABS-6 without APP shown in Fig. 3(d) becomes thinner and cracked, since lacking of APP which is the driving force for the formation of the heat resistant carbonaceous char by carbonization. .
Journal of Industrial and Engineering Chemistry. 16(2010):364-367
Online since: August 2018
Authors: Zhi Quan Wang, Qiao Liu, An Kang Yang, Zhi Hong Zhong
Ti3SiC2 ceramic with the unique layered structure and high Young's modulus (322 GPa) were considered to play a critical role in enhancing the joint.
In Fig. 5 (c), the content of Ti3SiC2 in the joint increased and its unique layer structure was observed on the fracture surface.
The uniform distribution of Ti3SiC2 and the toughening mechanism of its layered structure played an important role in getting better connection.
Li, Interface structure and formation mechanism of diffusion-bonded SiC/TiAl joint, Journal of Materials Science Letters 18(13) (1999) 1011-1012
Hubbard, Thermal properties of Ti3SiC2, Journal of Physics & Chemistry of Solids 60(4) (1999) 429-439
Online since: July 2011
Authors: Jian Hua Fang, Zi Jun Xia, Hong Xu, Xiao Xia Guo
Synthesis and Properties of Sulfonated Polyimide/Polybenzimidazole Cross-linked Membranes for Fuel Cell Applications Zijun Xia, Hong Xu, Xiaoxia Guo and Jianhua Fang a School of Chemistry and Chemical Engineering, State Key Laboratory for Metal Matrix Composite Materials, Shanghai Jiao Tong University, Shanghai 200240, China ajhfang@sjtu.edu.cn Keywords: Sulfonated Polyimide, Polybenzimidazole, Cross-linking, Membrane, Proton conductivity, Water stability.
To improve the radical oxidative stability, the incorporation of imidazole units into hydrocarbon polymer structure has been proved to be an effective method [6,7].
The purpose of introducing PBI to the membranes is to improve the radical oxidative stability, while the cross-linking structure is expected to be favorable for suppressing membrane swelling and enhancing the water stability.
Since the H2N-PBI contents are only 24.0, 16.7, and 12.8 wt%, respectively, in the membranes prepared from the SPI-3, SPI-5, and SPI-7, the prepared membranes must have the cross-linking structure.
This indicates that the cross-linked membranes might have lamellar structure (Fig. 3) to some extent, whereas the NTDA-ODADS/ODA(1/1) membrane has homogeneous structure because it is a random copolymer.
Online since: May 2010
Authors: Salim lamri, Cécile Langlade, Guillaume Kermouche
The structures of the coatings were investigated by X-ray diffraction (XRD) using a BRUKER AXS model D8 Focus diffractometer with monochromatic Co Kα radiation (λ = 1,788965 Å).
The columnar structures of the deposited coating can be clearly observed in figure 3.
N revealing a nearly stoichiometric CrN structure.
The broad but intense peak at 650700 cm -1 is also to be noted and may be related to the presence of the CrN structure in the analyzed volume.
Lucazeau, Journal of Physics and Chemistry of Solids 62 (2001) 553-563
Online since: December 2012
Authors: Jian Tao Liu, Xiao Cheng Ma, Kun Kun You, Jian Xing Ren, Xian Ping Zeng
Because of its highly toxic nature, subject to worldwide attention, its formation and degradation is the forefront topics of today's environmental chemistry research, the understanding the law of dioxin formation and degradation is of great significance of the reduction and treatment of dioxin environmental pollution.
Optimize the combustion process, improved combustion conditions to reduce the formation of PCDD/Fs Optimize the improvement of combustion parameters and furnace structure can reduce the formation of PCDD/Fs.
Appropriate choice of the furnace and the grate structure, full combustion of the garbage incinerator, the use of advanced furnace design also can reduce the formation of PCDD/Fs.
In general, fluidized bed combusts full than stoker structure, spiral-flow type combusts full than stationary type [15-17].
The electron beam can make air and water in the flue gas to generate reactive oxygen species and other reactive substances, thereby destroying the chemical structure of PCDD/Fs.