Novel approach to preparing epoxy/polyhedral oligometric silsesquioxane hybrid materials possessing high mass fractions of polyhedral oligometric silsesquioxane and good homogeneity

2006 ◽  
Vol 44 (6) ◽  
pp. 1869-1876 ◽  
Author(s):  
Ying-Ling Liu ◽  
Gung-Pei Chang
Keyword(s):  
Hybrid Materials ◽  
High Mass ◽  
Novel Approach ◽  
Mass Fractions ◽  
Good Homogeneity

scholarly journals Mycotoxins Biosynthesized by Plant-Derived Fusarium Isolates / Tvorba Mikotoksina U Vrstama Roda Fusarium Izoliranim Iz Biljaka

2012 ◽  
Vol 63 (4) ◽  
pp. 437-446 ◽  
Author(s):  
Agnieszka Waśkiewicz ◽  
Łukasz Stępień
Keyword(s):  
Secondary Metabolites ◽  
Asymptomatic Infection ◽  
Crop Plants ◽  
High Mass ◽  
Plant Tissues ◽  
Disease Symptoms ◽  
Perennial Crops ◽  
Mass Fractions ◽  
Very High

AbstractThere is little information on secondary metabolites produced by Fusaria infecting crop plants other than cereals. Many members of Fusarium genus have the ability to colonise perennial crops with only scarce infection or disease symptoms or with no symptoms at all while still being detectable. Even in case of such asymptomatic infection, significant mycotoxin contamination of the plant tissues is possible. The aim of this study was to characterise the spectrum of Fusarium species isolates obtained from different plant hosts (like asparagus, garlic, pineapple, banana, rhubarb, peppers, rice, maize, wheat, and oncidium) and evaluate their ability to biosynthesize the most common mycotoxins in vitro. Among the F.proliferatum isolates, up to 57 % of them biosynthesized fumonisins at very high mass fractions, amounting to above 1000 μg g-1, while other Fusarium species such as F. verticillioides, F. lactis, F. polyphialydicum, F. concentricum, F. temperatum, and F. fujikuroi formed fumonisins mostly at much lower level. Only F.ananatum and F. oxysporum did not produce these toxins. Co-occurrence of FBs with other mycotoxins [moniliformin (MON) and beauvericin (BEA)] was often observed and it was mainly F. proliferatum species that formed both mycotoxins (0.4 μg g-1 to 41.1 μg g-1 BEA and 0.1 μg g-1 to 158.5 μg g-1 MON).

Anomalous Enhancement of Heat Transfer to H2O/CO2 Mixtures in Near-Critical Region

2020 ◽  
Vol 143 (2) ◽  
Author(s):  
Hanlin Zhang ◽  
Haomin Wu ◽  
Sha Li ◽  
Dong Liu ◽  
Qiang Li
Keyword(s):  
Heat Transfer ◽  
Critical Point ◽  
Heat Transfer Enhancement ◽  
Convection Heat Transfer ◽  
High Mass ◽  
Transfer Enhancement ◽  
Transfer Coefficients ◽  
Property Variation ◽  
Mass Fractions ◽  
Efficient Heat Transfer

Abstract Heat transfer to supercritical H2O/CO2 mixtures (24 MPa, 310 to 430 °C, and CO2 mass fractions up to 18.5%), the working fluids of a novel power generation system with coal gasified in supercritical water, was experimentally investigated for typical working conditions of this system. For these conditions, i.e., high mass velocities (above 1200 kg m−2 s−1) and low heat flux (below 300 kW m−2), the convection heat transfer coefficients (HTCs) of supercritical pure fluids usually increase with temperature, peak near the pseudo-critical point, i.e., heat transfer enhancement, and then decrease for higher temperatures. Here, we experimentally demonstrated a new heat transfer enhancement phenomenon for supercritical H2O/CO2 mixtures. A high-temperature and high-pressure apparatus was setup to measure the convection HTCs of the supercritical H2O/CO2 mixtures. Experimental results show that surprisingly two distinct peaks of convection HTCs appear, with one corresponding temperature being the pseudo-critical point of the H2O/CO2 mixture, i.e., the thermophysical property variation induced mechanism, and the other one being the critical miscible point of the mixture, i.e., the dissolution-induced mechanism. These results pave the way to efficient heat transfer devices that use supercritical mixtures as heat transfer fluids.

scholarly journals Vapor phase processing: a novel approach for fabricating functional hybrid materials

2020 ◽  
Vol 31 (34) ◽  
pp. 342001
Author(s):  
Ka Ashurbekova ◽  
Kr Ashurbekova ◽  
G Botta ◽  
O Yurkevich ◽  
M Knez
Keyword(s):  
Hybrid Materials ◽  
Vapor Phase ◽  
Novel Approach

scholarly journals Not even wrong: A philosophical, historical and ultimately a scientific inquiry into the Schmidt Law

2016 ◽  
Vol 11 (S321) ◽  
pp. 37-39
Author(s):  
Barry F. Madore ◽  
Erika K. Carlson
Keyword(s):  
Star Formation ◽  
Scientific Inquiry ◽  
Closed Loop ◽  
Local Group ◽  
Active Regions ◽  
High Mass ◽  
Ob Stars ◽  
Novel Approach ◽  
Two Phases ◽  
Ngc 6822

AbstractWe introduce a novel approach to interpreting the well-known spatial correlation of gas densities with on-going star formation. Treated as a closed-loop process involving two physically distinct phases the data can be subdivided into regions that are active and those that are quiescent. The active regions can be distinguished by the presence of high-mass, short-lived, but recently-formed OB stars; the quiescent regions are marked by an absence of these stars and they are considered to be recovering from the last star-formation event and are re-collapsing. The relative (areal) frequencies of those two phases are directly proportional to the relative timescales. For four Local Group galaxies, NGC 6822, the Large & Small Magellanic Clouds, and M33, the cloud assembly/collapse timescales are all found to be monotonically decreasing power-law functions of density, with as yet to be explained differences.

scholarly journals Thermomechanical Response of Fullerene-Reinforced Polymers by Coupling MD and FEM

Materials ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4132
Author(s):  
Georgios I. Giannopoulos ◽  
Stelios K. Georgantzinos ◽  
Nick K. Anifantis
Keyword(s):  
Finite Element ◽  
Numerical Approach ◽  
Small Mass ◽  
Computational Effort ◽  
High Mass ◽  
High Symmetry ◽  
Computationally Efficient ◽  
Element Analysis ◽  
Mass Fractions ◽  
The Matrix

The aim of the present study is to provide a computationally efficient and reliable hybrid numerical formulation capable of characterizing the thermomechanical behavior of nanocomposites, which is based on the combination of molecular dynamics (MD) and the finite element method (FEM). A polymeric material is selected as the matrix—specifically, the poly(methyl methacrylate) (PMMA) commonly known as Plexiglas due to its expanded applications. On the other hand, the fullerene C240 is adopted as a reinforcement because of its high symmetry and suitable size. The numerical approach is performed at two scales. First, an analysis is conducted at the nanoscale by utilizing an appropriate nanocomposite unit cell containing the C240 at a high mass fraction. A MD-only method is applied to accurately capture all the internal interfacial effects and accordingly its thermoelastic response. Then, a micromechanical, temperature-dependent finite element analysis takes place using a representative volume element (RVE), which incorporates the first-stage MD output, to study nanocomposites with small mass fractions, whose atomistic-only simulation would require a substantial computational effort. To demonstrate the effectiveness of the proposed scheme, numerous numerical results are presented while the investigation is performed in a temperature range that includes the PMMA glass transition temperature, Tg.

scholarly journals RNA sequencing supports distinct reactive oxygen species-mediated pathways of apoptosis by high and low size mass fractions of Bay leaf (Lauris nobilis) in HT-29 cells

2015 ◽  
Vol 6 (8) ◽  
pp. 2507-2524 ◽  
Author(s):  
Annabelle L. Rodd ◽  
Katherine Ververis ◽  
Dheeshana Sayakkarage ◽  
Abdul W. Khan ◽  
Haloom Rafehi ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Rna Sequencing ◽  
Reactive Oxygen ◽  
Double Strand Breaks ◽  
High Mass ◽  
Oxygen Species ◽  
Dna Double Strand Breaks ◽  
Strand Breaks ◽  
Mass Fractions ◽  
Ht 29

DNA double strand breaks mediated by high mass bay leaf fraction in HT-29 cells.

Pneumatic separation and recycling of anode and cathode materials from spent lithium iron phosphate batteries

2019 ◽  
Vol 37 (4) ◽  
pp. 374-385 ◽  
Author(s):  
Haijun Bi ◽  
Huabing Zhu ◽  
Lei Zu ◽  
Shuanghua He ◽  
Yong Gao ◽  
...  
Keyword(s):  
Particle Size ◽  
Electrode Material ◽  
Present Model ◽  
Electrode Materials ◽  
Lithium Iron Phosphate ◽  
Iron Phosphate ◽  
Airflow Velocity ◽  
Novel Approach ◽  
Mass Fractions ◽  
Pneumatic Separation

A novel approach to recycling of copper and aluminum fragments in the crushed products of spent lithium iron phosphate batteries was proposed to achieve their eco-friendly processing. The model of pneumatic separation that determines the optimal airflow velocity was established using aerodynamics. The influence of the airflow velocity, and the density and thickness, and their ratios, of the aluminum and copper fragments on pneumatic separation were evaluated. The results show that the optimal airflow velocities of copper and aluminum fragments with and without the electrode materials are 3.27m/s and 1.67m/s, respectively. The accuracy and reliability of the present model was verified using a pneumatic separation experiment. It is concluded that graded pneumatic separation is unnecessary for the crushed particle size more than 9 mm. The experimentally determined optimal airflow velocity of the copper and aluminum fragments with and without the electrode materials is 3.3m/s and 1.7m/s, respectively. The mass fractions of the copper and aluminum fragments upon removal of the electrode materials after pneumatic separation are 97% and 96%, respectively, and both with the electrode material achieve 97.0%. The theoretically obtained optimal airflow velocities have good agreements with the experimentally obtained ones.

scholarly journals Concurrent Determination of U‐Pb Age and REE Mass Fractions of Zircon by High Mass Resolution SIMS

2020 ◽  
Vol 44 (3) ◽  
pp. 421-437
Author(s):  
Yu Liu ◽  
Qiu‐Li Li ◽  
Guo‐Qiang Tang ◽  
Xian‐Hua Li
Keyword(s):  
Mass Resolution ◽  
High Mass ◽  
High Mass Resolution ◽  
Mass Fractions

A Novel Approach to Prepare Nano-Hydroxyapatite / Silk Fibroin Composite to Increase Nucleation Sites

2007 ◽  
Vol 330-332 ◽  
pp. 341-344 ◽  
Author(s):  
Jing Wang ◽  
Mu Qin Li ◽  
Xiang Cai Meng ◽  
Guang Wu Wen
Keyword(s):  
Tissue Engineering ◽  
Silk Fibroin ◽  
Crystal Size ◽  
Solvent System ◽  
Spectrometric Analysis ◽  
Chemical Bonds ◽  
Novel Approach ◽  
Nucleation Sites ◽  
Strong Interfacial Bonding ◽  
Good Homogeneity

A composite of needle-like nano-Hydroxyapatite / silk fibroin (n-HA/SF) with strong interfacial bonding was successfully prepared from calcium chloride (CaCl2) and diammonium phosphate ((NH4)2HPO4) as starting materials of HA in the presence of SF powders dissolved in a ternary solvent system of CaCl2-C2H5OH-H2O (1:2:8 in molar ration) at 80 °C for 30 min prior to preparation of n-HA/SF composite. The n-HA crystals in the composite were poorly crystallized and uniformly distributed in the composite with a crystal size of 4~6 nm in diameter and 20~40 nm in length, which was smaller than that of pure nano-HA. Molecular interaction and strong chemical bonds were formed between n-HA and SF in the composite, which were revealed by Fourier transform infrared spectrometric analysis (FTIR). The synthetic n-HA/SF composite had a good homogeneity and preferential orientation along c-axis and would have a great potential for bone tissue engineering.

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