scholarly journals Fragmentation process of benzenedicarboxylic acid dimethyl esters.

1986 ◽  
Vol 34 (2) ◽  
pp. 99-105 ◽  
Author(s):  
Susumu Tajima ◽  
Seiji Tobita ◽  
Akio Negishi ◽  
Toshikazu Tsuchiya
Keyword(s):  
Fragmentation Process ◽  
Benzenedicarboxylic Acid

Syntheses of series of lanthanide metal−organic frameworks for efficient UV-light-driven dye degradation: experiment and simulation

CrystEngComm ◽  
2021 ◽  
Author(s):  
Fei Yuan ◽  
Haixia Ma ◽  
Chumei Yuan ◽  
Chun-Sheng Zhou ◽  
Huai-Ming Hu ◽  
...  
Keyword(s):  
General Formula ◽  
Dye Degradation ◽  
Uv Light ◽  
Metal Organic Frameworks ◽  
Benzenedicarboxylic Acid ◽  
Metal Organic ◽  
Lanthanide Metal ◽  
Experiment And Simulation

Three new Ln(III)-based metal-organic frameworks (MOFs), having general formula [Ln2(L)2(ox)(H2O)2]n (Ln = Nd (1), Sm (2) and Eu (3)) have been synthesized using multifunctional triazole-carboxylate linker 5-(1H-1,2,4-triazol-1-yl)-1,3-benzenedicarboxylic acid (H2L) and...

Synthesis and Characterization of Lanthanide Metal-Organic Frameworks with Perfluorinated Linkers

2016 ◽  
Vol 98 ◽  
pp. 70-74
Author(s):  
Andrius Laurikėnas ◽  
Jurgis Barkauskas ◽  
Aivaras Kareiva
Keyword(s):  
Metal Organic Frameworks ◽  
Aqueous Media ◽  
Xrd Analysis ◽  
X Ray Diffraction ◽  
Lanthanide Elements ◽  
Diffusion Controlled ◽  
Benzenedicarboxylic Acid ◽  
Metal Organic ◽  
Lanthanide Metal

In this study, lanthanide elements (Ln3+) and 2,3,5,6-tetrafluoro-1,4-benzenedicarboxylic acid (TFBDC) based metal-organic frameworks (MOFs) were synthesized by precipitation and diffusion-controlled precipitation methods. Powders insoluble in aqueous media and polar solvents were obtained. The microstructure and properties of Ln3+ MOFs were evaluated and discussed. X-ray diffraction (XRD) analysis, infrared (FTIR) spectroscopy, scanning electron microscopy (SEM) and fluorescence spectroscopy (FLS) were carried out to characterize Ln3+ MOF's crystallinity, the microstructure, chemical composition and optical properties.

Free Water Influence on the Dynamic Tensile Behaviour of Concrete

2011 ◽  
Vol 82 ◽  
pp. 45-50 ◽  
Author(s):  
Benjamin Erzar ◽  
Pascal Forquin
Keyword(s):  
Dynamic Behaviour ◽  
Free Water ◽  
Dynamic Strength ◽  
Fragmentation Process ◽  
Tensile Behaviour ◽  
Water Influence ◽  
Micro Cracks ◽  
The World ◽  
The Difference ◽  
Impact Experiments

Concrete is a material used all over the world for civil engineering but the mechanisms governing its dynamic behaviour are still not well understood. In this work, spalling tests and edge-on impact experiments have been used to determine the influence of the free-water contained in pores and micro-cracks on the dynamic strength and on the fragmentation process. Moreover, spalling tests have been also used to identify the main mechanisms leading to the difference of behaviour observed between wet and dry concrete.

scholarly journals Synthesis, Crystal Structure, and Properties of a New Coordination Polymer Built from N/O-Donor Mixed Ligands

Crystals ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 372
Author(s):  
Mei-An Zhu ◽  
Shuai-Shuai Han ◽  
Feng Deng ◽  
Jia-Le Li ◽  
Shui-Sheng Chen
Keyword(s):  
Coordination Polymer ◽  
Weak Interactions ◽  
Three Dimensional ◽  
Luminescent Properties ◽  
Tridentate Ligand ◽  
Supramolecular Polymer ◽  
X Ray Diffraction ◽  
X Ray ◽  
Mixed Ligands ◽  
Benzenedicarboxylic Acid

The coordination polymer, namely, [Cd(H2L)(nobda)]n (1) was prepared by the reaction of Cd(NO3)2·4H2O with 4-amino-1,2-benzenedicarboxylic acid (H2nobda) and 1,4-di(1H-imidazol-4-yl)benzene (H2L), and characterized by single-crystal X-ray diffraction, elemental analysis, infrared (IR) spectroscopy, thermogravimetric analysis, and powder X-ray diffraction (PXRD). The carboxylic acid of H2nobda ligands was completely deprotonated to be nobda2− anions, which act as tridentate ligand to connect the Cd2+ to form two-dimensional (2D) network, while the neutral H2L ligands serve as a linear didentate bridge to connect two adjacent Cd2+ ions upper and down the 2D layer. The adjacent 2D layers were further linked into the three-dimensional (3D) supramolecular polymer by the weak interactions such as hydrogen bonds and π−π stacking interactions. The ultraviolet-visible (UV-vis) absorption spectra and luminescent properties in the solid state at room temperature have been investigated.

scholarly journals The effect of fragmentation on spider richness (Arachnida: Araneae) in montane semideciduous seasonal forest

2021 ◽  
Vol 12 (4) ◽  
Author(s):  
Flávio Eduardo Vilas Boas Júnior ◽  
Amanda Da Silva Ferreira ◽  
Marcos Magalhães De Souza
Keyword(s):  
Species Richness ◽  
Atlantic Forest ◽  
Minas Gerais ◽  
Fragmentation Process ◽  
Natural Environments ◽  
Forest Fragments ◽  
Spider Species ◽  
Semideciduous Seasonal Forest ◽  
Agricultural Areas ◽  
Environmental Functions

The fragmentation process that has altered natural environments has been widely discussed, as it causes changes in communities and compromises different environmental functions. In this sense, this study was based on the evaluation of fragmentation on araneofauna of semideciduous seasonal forest fragments, phytophysiognomy belonging to the Atlantic Forest. The study was conducted in three fragments in the municipality of Inconfidentes, southern Minas Gerais, from April 2014 to March 2015. The results showed that there is a similarity in the composition of spider species among the sampled fragments and that the size of the fragment is positively correlated with species richness. Our data show that smaller fragments must be preserved and that agricultural areas maintain the integrity of adjacent forest areas to benefit from the predation dynamics that spiders exert on pests that affect plantations.

scholarly journals Identification of Cytotoxicity of Marine Sponge Dendrilla Membranosa Against L929 Cell Line

2019 ◽  
pp. 147-152
Author(s):  
Joicy Abraham ◽  
Mahija S. P ◽  
Jency George ◽  
Manjusha W. A
Keyword(s):  
Marine Sponge ◽  
Octanoic Acid ◽  
L929 Cell ◽  
Bioactive Compound ◽  
Marine Sponges ◽  
Test Material ◽  
Ms Analysis ◽  
Benzenedicarboxylic Acid ◽  
Sponge Extract ◽  
L929 Cell Line

Marine sponges are rich sources of pharmacological active compound. Marine sponge, Dendrilla membranosa was collected from the Vizhingam coast. The sponge extract was tested against eight human bacterial pathogens. The bioactive compounds present in marine sponge were determined by GC-MS analysis. The cytotoxic effect of the sponge was evaluated by using MTT assay. The extracts showed potent anti-bacterial activity against Staphylococcus aureus, Bacillus subtilis, Streptococcus pyogens. The bioactive compound present in marine sponge was identified by GC-MS analysis and the compounds are ethane, butane, formate pentane, Alpha d-galactopyranoside, 2-Ethylhexyl2-ethylhexanoate, Hexahydro hexitol, Styrene, Alpha-d glucopyranoside 1-pentyl-2-proppyl-1-octene, nonadecane, 1,2-benzenedicarboxylic acid, bis-2, Octanoic acid. The test material showed none cytotoxic response to fibroblasts cells. The results of present investigation revealed that, Dendrilla membranosa is a potential source of novel anticancer and antibacterial leads.

Radiochemical study on the mechanism of target fragmentation of Cu, Nb, Pr and Au targets induced by 12C and 40Ar projectiles

2001 ◽  
Vol 89 (11-12) ◽  
Author(s):  
Akihiko Yokoyama ◽  
S. Morimoto ◽  
H. Araki ◽  
J. Sanada ◽  
H. Baba ◽  
...  
Keyword(s):  
Cross Sections ◽  
Gamma Ray ◽  
Thick Target ◽  
Fragmentation Process ◽  
Gamma Ray Spectrometry ◽  
Target Fragmentation ◽  
Radiochemical Study

A thick-target thick-catcher experiment was performed to measure the formation cross sections and recoil momenta of products from target fragmentation of Cu, Nb, Pr, and Au by using gamma-ray spectrometry. Bombardments of C ions (180, 290, and 400 MeV/u) and Ar ions (290 and 650 MeV/u) were performed at the HIMAC facility in Japan. The results were discussed in comparison with systematics of fragmentation and used to deduce the prefragments in fragmentation process of the measured systems.

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