Miracle-dz/UniFAR-FTUs huggingface dataset:
Nano-assembly of glucose oxidase on the in situ self-assembled films of polypyrrole and its optical, surface and electrochemical characterizations

An in situ self-assembly technique with nanometre control over thicknesses and multilayered structures was used to manufacture the ultrathin films of polypyrrole (PPY). The PPY film was deposited on a polyanion, poly(styrene sulfonate) (PSS) modified surface as a function of time, previously PSS had been deposited on various substrates (glass, mica, indium-tin-oxide coated glass plates). Later, alternate PPY and PSS films were fabricated on such substrates using a layer-by-layer (LBL) technique. The glucose oxidase (GOD) molecules were also deposited on such self-assembled PPY films by the LBL technique. The PSS/PPY/GOD, PPY/PPY/GOD/poly(ethylene imine) (PEI)/GOD etc, film configurations were fabricated, and functionally as well as structurally characterized by UV-visible, electrochemical and scanning probe microscopy techniques, respectively. The results of a scanning probe microscopic study on the films were analysed to understand the molecular orientation of GOD on the PPY surface, and the dependence of the enzyme concentration for the depositing solutions. Moreover, the electrochemical studies performed provided information with respect to the electron transfer processes on the spatial arrangement of GOD molecules on the PPY surfaces. The immobilization of GOD on a conductive PPY represented a crucial and important step, and allowed us to construct the glucose-responsive biosensors.
Temperature and amino acid-assisted size- and morphology-controlled photochemical synthesis of silver decahedral nanoparticles

Stable silver decahedron nanoparticles were produced under the blue light irradiation (light-emitting diodes) of a modified precursor solution that has been previously reported. To improve the formation of the nano-decahedrons under blue light, we proposed the use of amino acids with electrically charged side chains (L-arginine, L-lysine and L-histidine). Our results show that L-arginine and L-lysine are best suited to improve the yield of the decahedrons. We also followed the kinetics of the photochemical synthesis under different irradiance conditions of 80, 50 and 15 mW/cm2. The maximum irradiance, 80 mW/cm2, resulted in a synthesis that was twice as fast as those associated with lower irradiances, and the corresponding decahedron yield was higher. The optimal temperature of the precursor solution for the improvement of the photochemical synthesis of silver decahedrons with Triton X-100 as a surfactant was also determined.
Level of Polychlorinated Biphenyls in Marine Environment of Algiers Bay, Algeria

Polychlorinated Biphenyls (PCBs) are persistent organic pollutants with significant bioaccumulation in the global environment. Owing to their high toxicity and lipophilic property, PCBs are potential threat to the human and ecological system. The objective of this work was to investigate the polychlorinated biphenyls in seawater and blue mussels Mytilus galloprovincialis collected in the eastern coastal side of the Algiers bay. Surface and bottom water samples were collected at six different periods from July to October 2002 in the port of Tamentfoust and four locations around the port. Mussel samples were collected from Tamentfoust port and Surcouf beach. After extraction, the PCBs levels were determined in marine water and biological samples by gas chromatography with electron capture detector. Total polychlorinated biphenyls concentrations varied from 4.0 to 18.8 ng · L−1 in surface and from 4.4 to 16.6 ng · L−1 in bottom seawater and were relatively high in August (30th and 45th days). In mussels that concentrate the organochlorinated compounds in their tissues, the sum of ICES 7 PCBs concentrations was relatively high. It ranged from 64.2 to 185.8 ng · g−1 dw (average 125.8 ng · g−1 dw) in samples collected from Surcouf. The level of contamination in Tamentfoust port mussels was about twice higher (225.2 ng · g−1 dw). The observed PCBs distribution was close to that of common commercial mixture and suggests an industrial origin of this pollution emitted from a continental source in addition to the port activities. Although the use of target compounds has been banned for more than three decades, they are still persistent in Algiers Bay.
Stochastic Models for Second‐Order Chemical Reaction Kinetics. The Equilibrium State

Stochastic models for a number of reversible chemical reactions involving one or two second‐order steps are examined and exact solutions which involve standard orthogonal polynomials are found for the equilibrium states. The expected values and variances of the numbers of molecules present in the systems at equilibrium are expressed in terms of these polynomials. Comparison of the stochastic mean value and the classical deterministic expression, shows that they are equivalent for most systems of physical interest, that is when large numbers of molecules are present. The relative fluctuation is found to be O (N −½), where N is of the order of the number of molecules present in the system, in agreement with the results of equilibrium statistical mechanics.
Polymeric micelles: authoritative aspects for drug delivery

The generation of supramolecular architectures with well-defined structures and functionalities is recently garnering attraction. Self-assemblage of amphiphilic polymers leads to the formation of polymeric micelles that demonstrate unique set of characteristics such as excellent biocompatibility, low toxicity, enhanced blood circulation time, and solubilization of poorly water-soluble drugs. In this article, we provide an up-to-date review on important aspects of polymeric micelles. Critical factors for solubilization of hydrophobic drugs in the micellar core are discussed. Polymeric micelles can be used as ‘smart’ drug carriers for targeting certain areas of the body. Here, we have especially emphasized on the recent developments in the targetability of certain tissues such as cancerous tissues using polymeric micelles. Different stimuli exploited for creating stimuli-sensitive micelles are discussed comprehensively. Application of polymeric micelles in the photodynamic therapy is also meticulously described.
Prostaglandin Syntheses by Three‐Component Coupling. New Synthetic Methods (49)

The role played by prostaglandins (PGs) in the human body is bewitching. Following the elucidation of their structures in the early 1960s, tremendous efforts were made for the realization of an efficient chemical synthesis, since a sufficient supply of such very rare, naturally occurring local hormones relies solely on their total synthesis. Of the many synthetic routes described in the literature, the majority of which are linear or sequential in nature, the Corey synthesis is perhaps the most versatile; so far more than 5000 prostaglandin analogues have been prepared and have been tested biologically. Some natural prostaglandins and their analogues are already in clinical use. In view of the continuing expansion of this field, we have been fascinated with the concept of developing a highly convergent entry to prostaglandins based on a new strategy. The discovery of a highly enantioselective method for the reduction of prochiral ketones and the elaboration of a procedure for double vicinal CC-coupling with enones have enabled a one-pot synthesis of the complete prostaglandin skeleton by linking a chiral 4-oxygenated 2-cyclopentenone unit and two side-chain blocks. This approach is efficient and flexible and allows the direct production of all the naturally occuring prostaglandins and a wide spectrum of analogues.
Effects of cereal roots on detachment rates of single‐ and double‐drilled topsoils during concentrated flow

Farmers in Europe want to control soil erosion in ways that are easily incorporated in their normal practices. We have investigated the possibility of reducing soil erosion by concentrated flow (i.e. rill and gully erosion) through increasing the root density of cereal crops. In situ root density measurements on cereal fields were combined with laboratory flume experiments on samples, taken in single‐ and double‐drilled fields, of which the above‐ground biomass was clipped. During the laboratory experiments no significant effect of root densities on critical shear stress or channel erodibility was observed because of interactions with other changing parameters (e.g. ageing effects). Therefore, the expected relative detachment rates as a function of plant root density were calculated using an empirical equation. During the first 75 days of the crop growth season relative soil detachment rates for single‐drilled field parcels can be reduced up to 50% compared with a rootless field, whereas relative soil detachment rates in double‐drilled field parcels can be reduced up to 60% in this period. Thereafter, plant roots in double‐drilled field parcels reduce relative soil detachment rates on average by 9% compared with single‐drilled field parcels (up to an absolute maximum of 90% compared with rootless soils). During the growing season, not only root density increases but also the vegetation cover changes, which enhances soil protection from erosion. Therefore, cereal roots will help to conserve the soil when seed is drilled at double rates, especially during the early growth stages and in fields with medium risk of concentrated flow.
Structure and Vibrations of Small Carbon Clusters from Coupled-Cluster Calculations

The vibrational spectrum of the linear carbon clusters C2−C9 and of cyclic C4, C6, C8, and C10 has been investigated using the augmented coupled-cluster, CCSD(T), method and correlation-consistent basis sets. Particular emphasis is placed on assignment of bands in matrix infrared spectra of trapped graphite vapor. The relative energetics of linear and cyclic isomers of C6, C8, and C10 were investigated at the CCSD(T) level using basis sets of [4s3p2d1f] quality. Our best calculations predict that the ground state structure of C6 is a cumulenic D3h ring and that of C8 a polyacetylenic C4h ring. Linear states are close in energy (13 ± 2 and 8 ± 2 kcal/mol, respectively), and both forms should be observable. The ground state structure of cyclic C10 clearly has D5h rather than D10h symmetry, at least for the re geometry. A linear regression of computed CCSD(T)/[3s2p1d] harmonic frequencies vs observed fundamentals for the previously assigned stretching frequencies of linear Cn clusters has a very high correla.
Prediction of Poultry Meat Tenderness Using Razor Blade Shear, Allo‐Kramer Shear, and Sarcomere Length

: This study was conducted to evaluate a new shearing method for the determination of poultry meat tenderness. Breast fillets were deboned at various postmortem times (0.25 to 24 h) to yield a vast array of tenderness levels. A trained descriptive panel was used to evaluate samples for attributes including initial hardness and chewdown hardness; instrumental measurements included Allo-Kramer (AK) and razor blade (RB) shear and laser sarcomere length determination. The RB shear method exhibited a higher correlation to sensory attributes than the AK method, suggesting that the new razor blade shear method is more advantageous in predicting poultry meat tenderness than the standard AK shear method. This new method not only has a higher sensory predictive value, but also requires shorter sample preparation time than the AK shear test because it is conducted on intact fillets.
Compositional Dependence of Magnetic Properties in CoFe/Au Nanobarcodes

Nanobarcodes consisting of multicomponents and multisegments have gained attention lately because they can offer multiple functionalities. Here, we report the structure, composition, and magnetic properties of CoFe/Au nanobarcodes fabricated by a pulsed electrodeposition method in one solution bath. The nanobarcodes with three different compositions in magnetic segments including Co68Fe32 (Co-rich), Co50Fe50 (equiatomic), and Co35Fe65 (Fe-rich) exhibit different magnetic characteristics as a result of compositional variation. The highest saturation magnetization value of 1739 emu/cm3 was observed in the Fe-rich case.
Design of a current converter to maximize the power into homogeneous dielectric barrier discharge (DBD) devices

Dielectric Barrier controlled Discharges (DBD) are able to produce low temperature plasmas at atmospheric pressure. DBD are used since a long time for various industrial applications. In the surface treatment industry, even though it is widely used, the reproducibility of the surface treatment process, called corona, is limited due to the type of DBD used, which is a ﬁlamentary one. Under speciﬁc experimental conditions (frequency and amplitude of the applied voltage, gas type, ) the discharge is homogeneous like low-pressure plasmas. The type of discharge is of great interest for thin ﬁlm deposition. However, the treatment time is still too long for an online process. To reduce the treatment time, the discharge power must be increased. In this paper, we show that supplying a homogeneous DBD in nitrogen with a current controlled power source is a better alternative than sinusoidal voltage source. It allows to maximize injected power accurately control the injected power. Such a power converter especially designed for experimental validation purposes is then studied.
Physical and photoelectrochemical characterization of Ti-doped hematite photoanodes prepared by solution growth

We present the fabrication and characterization of Ti-doped hematite (α-Fe2O3) films for application as photoanodes in photoelectrochemical (PEC) cells for water splitting. It is demonstrated that Ti doping significantly improves the PEC activity as the photocurrent at 1.0 V vs. Ag/AgCl electrode for a 400 nm thick Ti-doped film (0.66 mA cm−2) was found to be ∼14 times higher than that of an undoped film (0.045 mA cm−2). The films were characterized by X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and ultrafast transient absorption spectroscopy to obtain information about their structural, electronic, and charge carrier dynamic properties. Based on characterization of the chemical states of the involved elements as well as the charge carrier dynamics of the films with Ti doping, it appears that the photocurrent enhancement is related to an increase in charge carrier density or reduced electron–hole recombination. The highest incident photon conversion efficiency (IPCE) measured for this system was 27.0% at 360 nm at a potential of 1.23 V vs. reversible hydrogen electrode (RHE), which was obtained on a 400 nm thick Ti-doped α-Fe2O3 film.
Density and viscosity for monoethanolamine + water, + ethanol, and + 2-propanol

Densities and viscosities were measured for monoethanolamine (MEA) + water, MEA + ethanol, and MEA + 2-propanol at 303.15, 313.15, and 323.15. We excess volumes and viscosity deviations from the mole fraction average were calculated and correlated by a Redlich-Kister type equation. McAllister's models were also applied to correlate the kinematic viscosities
Pengaruh Rotasi Audit, Spesialisasi Industri KAP, dan Client Importance Terhadap Kualitas Audit (Studi dengan Pendekatan Earning Surprise Benchmark)

This research was aimed to examine empirically the effect of several factors to audit quality. These factors are Audit Rotation, Audit Firm Specialization and Client Importance. The population that will be used in this research are company listed in Indonesia Stock Exchange. This study uses sampel of 85 manufacturing companies listed in Indonesia Stock Exchange in the period 2015-2017. In this study, audit quality is measured by earning surprise benchmark. The method used was purposive sampling. The method of data analysis in this study use logistic regression with SPPS version 23. The results of this prove that (1) audit rotation is not proven to have an impact on audit quality, where sig value 0,915 > 𝛼 0,05 which means H1 is rejected (2) audit firm specialization is proven to have an impact on audit quality, where sig value 0,04 < 𝛼 0,05 which means H2 is accepted (3) client importance is not proven to have an impact on audit quality, where sig value 0,809 > 𝛼 0,05 which means H3 is rejected. The amount of Adjusted R is 0.036 gives the sense that rate is 3,6% of level audit quality can be explained by independent variables while 96.4% can be explained by the other independent variabels that are not tested in this study.Keywords: Audit Rotation, Audit Firm Specialization, Client Importance, Audit Quality
The retrograde technique for recanalization of chronically occluded coronary arteries: Case series report

Background. Chronic total occlusion (CTO) of coronary artery still represents one of the most challenging lesion subset in field of interventional cardiology. Considering the complexity and increased risk posed by the retrograde approach, it is most often performed after a failed antegrade approach. Methods. We present a series of cases dedicated to the retrograde approach as a special technique for the treatment of chronic total coronary artery occlusion. All cases have some special characteristics that are today part of a dedicated portfolio in every cath lab. Results. In our series of cases all of three percutaneous coronary interventions (PCI) with retrograde approach finished with successful recanalization of CTO with different strategy and supported with rotational atherectomy (RA) or intravascular ultrasound (IVUS). Conclusion. In cases where there is the presence of interventional collaterals, as well as when the anterograde approach is very difficult, the retrograde approach can increase the success rate of procedures. The retrograde approach requires a long learning curve as well as very skilled and experienced operators who are able to perform the procedure independently.
Interaction between Proprioception, Forward Head Posture and Neck Pain in Adult Women

Background: One of the most common inappropriate postures is forward head posture (FHP), which the head is placed in front of the trunk in sagittal plane. Due to head and neck joints and muscles’ impairments, it seems this postural disorder might affect neck proprioception. The purpose of the present study was to evaluate cervical proprioception in FHP subjects with and without neck pain and healthy subjects. Methods: 31 subjects with FHP, 31 subjects with FHP and 31 healthy subjects were participated in this study. Craniovertebral (CV) angle was determined by photography. Cervical range of motion (CROM) device was used to measure active range of motion (AROM), joint reposition error of target angle (50 percent of the total AROM) and neutral angle in neck flexion, extension, left and right rotation and lateral flexion. Results: The results of ANOVA test showed there was a significant difference between AROM of extension, right rotation, and left lateral flexion between groups (p<0.05). Furthermore, there was a significant difference between target and neutral angle reposition error in all directions in FHP groups and healthy group (p<0.05). Also, the result of Pearson correlation test showed a significant and inverse correlation between CV angle and repositioning error (p<0.05). Conclusion: The results of our study showed that FHP, regardless of pain, increases the amount of joint reposition error. As a result, mechanical stability and normal kinematics are reduced.
2-Phenylthiazol-Derivate aus Pseudomonas cepacia / 2-Phenylthiazole Derivatives from Pseudomonas cepacia

Abstract From the culture medium of Pseudomonas cepacia 2-(o-hydroxyphenyl)-thiazol and its 4-carbaldehyd and 4-carboxylic acid derivatives (aeruginoic acid) could be isolated. Their structures were elucidated and confirmed by synthesis.
Synthesis of Aluminum Titanate Powder at Low Temperature via Nonhydrolytic Sol-Gel Method by Using Aluminum Powder

Aluminum titanate (Al2TiO5) powder has been synthesized at low temperature via nonhydrolytic sol-gel method by using aluminum powder as aluminum source, titanium tetrachloride as titanium source, anhydrous ethanol as oxygen donor with different catalysts. The phase transformation of aluminum titanate xerogel powder during heat treatment and the influence of the mixing orders of raw materials, catalyst kinds on the synthesis of aluminum titanate were investigated by means of differential-thermal analysis (DTA-TG), X-ray diffraction (XRD), transmission electron microscope (TEM). The results indicated that aluminum titanate powder was easily synthesized at 750 °C by using AlCl3 as catalyst with a mixing order of adding TiCl4 before AlCl3 into aluminum alcohol mixture. The catalytic order of the different catalysts in the preparation process of aluminum titanate is: FeCl3> AlCl3> MgCl2. The catalyst promoted the activation of metal aluminum powder and played a major role in the synthesis of aluminum titanate powder at low temperature via nonhydrolytic sol-gel method.
Measurement of Wax Appearance Temperature under Simulated Pipeline (Dynamic) Conditions

Fluid flow in petroleum pipelines is a dynamic phenomenon. Therefore, measurement of the wax appearance temperature (WAT) under a simulated pipeline (dynamic) condition provides more valuable WAT data than the conventional procedures, which are performed under static (atmospheric) conditions. In this work, the WAT values of blends of Alaska North Slope (ANS) crude oil and gas-to-liquid (GTL) products were determined under dynamic (flowing) conditions using an indigenously designed and developed flow loop. The WAT values of the samples were also determined under static conditions using the viscosity method and verified using the American Society for Testing and Materials (ASTM) D3117 method. The WAT values decreased with an increase in the line pressure and GTL content. The results reported in this paper are part of a major project on studying the operational challenges in GTL transportation through the Trans-Alaska Pipeline System (TAPS).
Ondes acoustiques sur l'arête d'un solide

Acoustic waves propagating along edges formed by two surfaces exist in limited solids in addition to bulk and surface waves. These waves are called edge or line waves. Propagation of the edge waves has been investigated experimentally on samples of glass, PZT ceramics, SiO 2 and LiNbO 3 . Edge wave convolvers have been fabricated and experimentally investigated using PZT and LiNbO 3 samples. In the paper, methods of waveguides fabrication are discussed. Some new possibilities of edge waves excitation are also proposed Etude experimentale de la propagation des ondes d'arete, en plus des ondes de volume et de surface, sur des echantillons de verre, ceramique PZT, SiO 2 et LiNbO 3 . Analyse de l'interaction non lineaire de deux ondes d'arete se propageant en sens opposes dans PZT et LiNbO 3 . Obtention d'une convolution acoustique. Discussion du procede de fabrication de guides d'onde. Proposition de methodes nouvelles d'excitation d'onde d'arete
Vapor-Phase Dehydrocoupling of Methanol to Methyl Formate over CuAl2O4

Abstract CuO–Al 2 O 3 systems with different Cu/Al ratios were prepared by the amorphous citrate process, and their catalytic activities for the dehydrocoupling of methanol to methyl formate were examined. In the CuO–Al 2 O 3 systems, CuAl 2 O 4 samples calcined at temperatures below 1000°C were partially reduced during the reaction at 310°C and decreased the selectivity to methyl formate (MF) with increasing Cu(0) content. Cu(0) species catalyzed the dehydrocoupling reaction without decomposition of methyl formate at temperatures below 210°C, whereas Cu(0) decomposed methyl formate into methanol and CO above 210°C. On the other hand, CuAl 2 O 4 calcined at 1100°C showed the highest activity of the formation of methyl formate at a reaction temperature of 310°C. Since the CuAl 2 O 4 sample was not reduced even at 310°C, Cu(II) species in the CuAl 2 O 4 were found to be effective sites for the dehydrocoupling at temperatures above 250°C. In addition, Cu(I) species in CuAlO 2 was also found to be active with keeping high MF selectivity up to 290°C.