bluuebunny/crossref_metadata_2025 huggingface dataset:
Inhibition of miR-143-3p alleviates myocardial ischemia reperfusion injury via limiting mitochondria-mediated apoptosis
Authors: Lu Chuang-Hong , Chen De-Xin , Dong Kun , Wu Yun-Jiao , Na Na , Wen Hong , Hu Yao-shi , Liang Yuan-Ying , Wu Si-Yi , Lin Bei-You , Huang Feng , Zeng Zhi-Yu
Published: February 2023

MicroRNA (miR)-143-3p is a potential regulatory molecule in myocardial ischemia/reperfusion injury (MI/RI), wherein its expression and pathological effects remains controversial. Thus, a mouse MI/RI and cell hypoxia/reoxygenation (H/R) models were built for clarifying the miR-143-3p’s role in MI/RI. Following myocardial ischemia for 30 min, mice underwent reperfusion for 3, 6, 12 and 24 h. It was found miR-143-3p increased in the ischemic heart tissue over time after reperfusion. Cardiomyocytes transfected with miR-143-3p were more susceptible to apoptosis. Mechanistically, miR-143-3p targeted B cell lymphoma 2 (bcl-2). And miR-143-3p inhibition reduced cardiomyocytes apoptosis upon H/R, whereas it was reversed by a specific bcl-2 inhibitor ABT-737. Of note, miR-143-3p inhibition upregulated bcl-2 with better mitochondrial membrane potential (Δψm), reduced cytoplasmic cytochrome c (cyto-c) and caspase proteins, and minimized infarction area in mice upon I/R. Collectively, inhibition of miR-143-3p might alleviate MI/RI via targeting bcl-2 to limit mitochondria-mediated apoptosis. To our knowledge, this study further clarifies the miR-143-3p’s pathological role in the early stages of MI/RI, and inhibiting miR-143-3p could be an effective treatment for ischemic myocardial disease.
Global geopotential models evaluation based on terrestrial gravity data over Ethiopia
Authors: Alemu Eyasu
Published: February 2023

The availability of high-degree and recent global geopotential models is a crucial resource for different geodetic and geophysical applications such as modelling of geoid and quasi-geoid and establishing global reference and height systems, estimating Moho depth, gravity anomaly and tectonics, other geopotential functional, and oceanography, which emphasizes the importance for model evaluation. We have therefore estimated complete Bouguer anomalies and Moho whose results are evaluated with the terrestrial values. We validate the recently released satellite-only and high-degree combined GGMs over Ethiopia using terrestrial gravity data based on a statistical comparison of the Bouguer anomaly, its residual and Moho depth. The terrestrial-derived gravity anomaly is more accurately estimated by EIGEN6C4. The assessment against a recently conducted high resolution (∼3 km) terrestrial and airborne gravimetric survey over Ethiopia shows that EIGEN6C4/SGG_UGM_1 and 2 have the highest accuracy (∼3.28/3.27 mGal). However, the comparison with such data hardly discriminates the qualities of other GGMs that have or are truncated to the same degree and order. Whereas, the validation results of GGMs against terrestrial and airborne data are identical. EIGEN6C4, SGG_UGM_2, XGM2016, XGM2019e_2159/SGG_UGM_1 have the best quality, and the accuracy of associated Moho is 4.89/4.90 km, and this value changes to 4.98/4.91/5.51 km when the EGM08/ITSG_Grace2018s/GOCO06S are assessed.
Modern and post-modern portfolio theory as applied to moneyline betting
Authors: Harville David A.
Published: February 2023

Modern and post-modern portfolio theory were devised by Harry Markowitz (among others) for purposes of allocating some monetary resources among a number of financial assets so as to strike a suitable balance between risk and expected return. The problem it addresses bears a considerable resemblance to one encountered in making “moneyline” bets on the outcomes of contests in sports like American football. In distributing some allotted funds among a number of such bets, it may be desired to account for the risk. By introducing suitable modifications, the procedures employed in modern and post-modern portfolio theory for the allocation of resources among financial assets can be adapted for use in the distribution of funds among multiple bets. As in the case of financial assets, the most appropriate measures of risk are ones like the semi-deviation or semi-variance that penalize only negative or below-target returns. The various procedures are illustrated and compared by applying them retrospectively to moneyline bets on the outcomes of the college football “bowl” games from the 2020 season.
Reducing bat mortality at wind farms using site-specific mitigation measures: a case study in the Mediterranean region, Croatia
Authors: Rnjak Dina , Janeš Magdalena , Križan Josip , Antonić Oleg
Published: February 2023

A 4-year monitoring of bat fauna at Rudine wind farm in Croatia aimed to produce mitigation measures to minimize both the number of bat fatalities and power loss in energy production. During the first 2 years, a high number of carcasses was found from mid-July to the end of October, indicating the need for some mitigation strategy. Based on the results of carcass searches, meteorological data and bat activity monitored at a weather mast and four wind turbine nacelles, mitigation measures were proposed. During the next 2 years, wind turbine curtailment was implemented in the high collision risk period based on critical wind speed thresholds varying from 5.0 to 6.5 ms−1. Estimation of a total number of bat fatalities was conducted with the GenEst software for each monitoring year. A 78% reduction in estimated number of fatalities was recorded indicating the effectiveness of implemented measures.
Crystal structure of bis(benzylamine-κ1
N)-bis((E)-2-methyl-3-phenylacrylato-κ1
O)copper(II), C34H36CuN2O4
Authors: Moon Sunhwa , Shin Jiehye , Ok Kang Min , Do Junghwan
Published: February 2023

C34H36CuN2O4, monoclinic, P21/n (no. 14), a = 15.4951(2) Å, b = 5.62730(10) Å, c = 17.3541(2) Å, β = 90.831(1)°, V = 1513.04(4) Å3, Z = 2, Rgt
(F) = 0.0415, wRref
(F
2) = 0.0986, T = 296 K.
Crystal structure of bis(2,5,5,7-tetramethyl-1,4-diazepane-1,4-diium) diaqua-bis(1,2-diaminopropane)copper(II) bis(μ6-oxido)tetrakis(μ3-oxido)-tetradecakis(μ2-oxido)-octaoxido-decavanadium(V) – water (1/4), C24H76CuN8V10O34
Authors: Deng Yuan-Huan , Wang Qiong
Published: February 2023

C24H76CuN8V10O34, monoclinic, P21/n (no. 14), a = 22.416(4) Å, b = 11.7003(18) Å, c = 20.079(3) Å, β = 95.594(7)°, V = 5241.2(14) Å3, Z = 4, Rgt
(F) = 0.0243, wR
ref(F
2) = 0.1110, T = 296(2) K.
Crystal structure of 1-(4-methoxyphenyl)-2-phenoxyethan-1-one, C15H14O3
Authors: Sun Shixiong , Zhao Benbo , Deng Ping , Cheng Yuan
Published: February 2023

C15H14O3, M = 242.26 g/mol, monoclinic, P21/c (no. 14), a = 5.5859(10) Å, b = 24.818(4) Å, c = 9.3393(15) Å, β = 101.128(3)°, V = 1270.4(4) Å3, Z = 4, R

gt
(F) = 0.0410, wR

ref
(F
2) = 0.1394, T = 296(2) K.
Crystal structure of bis(6-carboxyhexyl)-4,4′-bipyridinium dibromide – 2,6-dihydroxynaphthalene (1/2), C42H46Br2N2O8
Authors: Yu Xuewen
Published: February 2023

C42H46Br2N2O8, monoclinic, P21/n (no. 14), a = 7.5393(9) Å, b = 10.7586(12) Å, c = 24.073(3) Å, β = 91.275(3)°, V = 1952.1(4) Å3, Z = 2, R
gt(F) = 0.0446, wR
ref(F
2) = 0.1037, T = 293(2) K.
Crystal structure of bis(N,N-dimethylformamide-κO)-bis(pyridine-2-carboxylato-κ
2
N,O)-bis(μ
2-pyridine-2-carboxylato-κ
2
N,O)-dinickel(II), C30H30N6Ni2O10
Authors: Ha Kwang
Published: February 2023

C30H30N6Ni2O10, triclinic,

P

1
‾

$P\overline{1}$

(no. 2), a = 9.1314(5) Å, b = 9.4120(5) Å, c = 10.8608(5) Å, α = 68.1912(16)°, β = 70.7776(17)°, γ = 86.8173(18)°, V = 815.93(7) Å3, Z = 1, R
gt(F) = 0.0207, wR
ref(F
2) = 0.0528, T = 223(2) K.
Crystal structure of catena-poly[dipyridine-bis(pyridine-2-carboxylato-κ
2
N,O)-bis(μ
2-pyridine-2-carboxylato-κ
2
N,O)-dinickel(II)], C34H26N6Ni2O8
Authors: Ha Kwang
Published: February 2023

C34H26N6Ni2O8, monoclinic, P21/n (no. 14), a = 12.4072(8) Å, b = 13.5186(10) Å, c = 19.4750(14) Å, β = 92.902(2)°, V = 3262.3(4) Å3, Z = 4, R

gt
(F) = 0.0304, wR

ref
(F
2) = 0.0809, T = 223 K.
Hybrid nanofiller reinforcement in thermoset and biothermoset applications: A review
Authors: Zulkefli Nur Aliaa , Mustapha Rohani , Jusoh Suriani Mat , Ruzaidi Ghazali Che Mohd , Awang Mohamad , Norrrahim Mohd Nor Faiz , Ilyas Rushdan Ahmad
Published: February 2023

Thermoset and biothermoset applications have been advancing tremendously in recent years due to their easy processing, versatility, and exceptional mechanical and thermal properties. Biothermoset is a type of thermoset that is produced using biological resources, either in portions by blending with the conventional resin, or completely. Various research has been employed to accommodate their high and rapidly growing demands and broaden their functions and implementation in numerous fields. One of these attempts is the reinforcement of nanofillers. Nanofillers such as nanoclay, graphene nanoplatelets, carbon nanotubes, nanodiamond, etc., possess diverse and outstanding properties and are also easily accessible. Recently, there has been a developing trend of hybridizing two or more types of nanofillers as a hybrid reinforcement system to address the limitations of single-filler reinforcement systems and to establish better-supporting properties of the nanocomposites. In this review, we discussed the use of hybrid nanofillers in different thermoset and biothermoset applications. Emphasis is given to the types of hybrids, their interactions with each other and the host polymer, and the effects of their contents and ratios. Limitations from the previous works are also discussed and the future undertaking of research on hybrid nanofillers is also proposed.
Study on the flame retardancy of carrageenan fiber papers
Authors: Zhai Hongjie , Qiao Cuixia , Geng Cunzhen , Xia Yanzhi , Zhao Gang , Xue Zhixin
Published: February 2023

Carrageenan fibers crosslinked with trivalent metal ions (Al3+ or Fe3+) were prepared into carrageenan fiber paper (Al/CAP, Fe/CAP) by the Rapid Kothen method, and their flame-retardant mechanism and flame retardancy were studied through LOI, VF, SEM, CONE, and TGA testing. The results showed that Al/CAP exhibited good flame retardancy and thermal stability, and its LOI value reached 52%. Meanwhile, the afterflame time and afterglow time of Al/CAP were 0 and 1 s, respectively, which indicated that it was not ignited and almost had no smoldering phenomenon. The flame-retardant performance of Fe/CAP is inferior to that of Al/CAP, with LOI of 32, but the total smoke emission (TSP) of Fe/CAP is lower in cone calorimetry test. Thus, CAPs (especially Al/CAP) can be widely used in the flame-retardant paper industry, due to their flame retardancy and environmental protection.
French Predicate Anaphora, Comparatives, and Ellipsis
Authors: Authier J.-Marc
Published: February 2023

While French does not display the kind of VP-ellipsis found in languages like English, it effects verbal anaphora by means of two constructions that have received relatively little attention in the literature. Both of these combine the generic ‘action verb’faire‘do’ with what appears to be a pronoun. The first one, which I callle-faireanaphora (LFA), uses the cliticle, whereas the second one, which I callfaire-çaanaphora (FCA), brings into play the strong pronounça‘it/that’. Taking such pronouns to be substitutive pro-forms devoid of inner structure cannot, however, explain why LFA, but not FCA, can appear in the standard of a comparative, a property that distinguishes English VP-ellipsis from VP-pro-forms likedo it/that/so, which behave like FCA. On the other hand, LFA, unlike English VP-ellipsis, does not allowwh-extraction from a VP-internal position outside the realm of comparatives, which leads to a paradox left unresolved in the literature. In this article, I argue that LFA involves ellipsis of a wholevP phase. Specifically, I argue thatfairein LFA, but not in FCA, is a (semi)auxiliary verb that takes avP complement and bears an E-feature lexicalized by the cliticle. I show that this correctly predicts that A-movement out of the ellipsis site is possible and that A-bar movement of a degreewh-phrase out ofvP in comparatives is made possible by the fact that French licenses Quantification at a Distance, a grammatical operation that allows degree quantifiers to escapevP before the next phasal head (C) is merged and triggers ellipsis. Otherwh-quantifiers that do not benefit from the Quantification at a Distance option are then expected to not be able to escapevP prior to ellipsis, hence run-of-the-millwh-extraction out of VP is correctly predicted to be incompatible with LFA. I then turn to what appears to be a related anaphoric phenomenon, which consists of the predicational copulaêtre‘be’ and the cliticle, which I calll’êtreanaphora (LEA), and show that it too is an instance of ellipsis in that it allows the full range of extraction phenomena out of the missing constituent introduced by the copula. I assume that in those cases in which the copula takes a small clause, it participates in an asymmetric structure where it lexicalizes Pred, a head that mediates between subject and predicate. In those cases in which the copula introduces a passivized VP, on the other hand, I assume that it lexicalizesv, an assumption in line with theories that posit multiple instantiations of predicate mediators (so-called ‘flavors ofv’). In both cases, the copula in LEA heads a phase, bears an E-feature lexicalized byle, and is argued to license ellipsis of its phasal complement. Thus, elements are allowed to escape ellipsis by moving to the edge of the phase headed by the copula, and this correctly predicts that LEA permits a wider range of extractions out of the ellipsis site than LFA does.
Does poor sleep quality lead to increased low back pain the following day?
Authors: O’Hagan Edel T. , Cashin Aidan G. , Hübscher Markus , Mohammad alsaadi Saad , Gustin Sylvia , McAuley James H.
Published: February 2023

Objectives

This study explored the relationship between sleep quality and next-day pain intensity for people with low back pain and investigated whether there was any evidence that this relationship was causal.

Methods

We conducted a secondary analysis of an observational study that investigated sleep quality in people with low back pain. People with low back pain were recruited from primary care and the community. Sleep quality was measured with subjective (self-report) and objective (polysomnography (PSG)) measures. PSG analysis classifies sleep into stages, of which slow-wave sleep (SWS) is thought to have a key role in maintaining or increasing pain intensity. We drew directed acyclic graphs to identify possible confounders of the relationship between both measures of sleep quality, and pain intensity. We constructed two linear regression models to explore the effect of subjective and objective sleep quality on next-day pain intensity before and after confounder adjustment.

Results

Thirty-nine participants were included in the study. For participants with low back pain, self-reported better quality sleep β=−0.38 (95% CI −0.63 to −0.13), or spending a greater proportion of time in SWS β=−0.12 (95% CI −0.22 to −0.02) was associated with lower next day pain intensity. After confounder adjustment, the effect reduced and was no longer significant for either self-reported β=−0.18 (95% CI −0.46 to 0.10), or SWS β=−0.08 (95% CI −0.18 to 0.03).

Conclusions

Sleep quality, whether measured by self-report or proportion of time in SWS, was associated with next day pain intensity for people with low back pain. However, this relationship is likely to be confounded and therefore not likely to be causal.
El debate político-hermenéutico en torno a la violencia sexual y el feminicidio
Authors: Gómez Campos Rubí de María
Published: February 2023

La violencia contra las mujeres alcanza su expresión más siniestra en el flagelo de nuestro tiempo: el feminicidio. No obstante, la respuesta social e institucional ha sido insólita. Grandes sectores sociales permanecen impasibles ante el aumento de asesinatos cruentos de mujeres y niñas. Inadmisible desde una concepción de humanidad crítica y consciente de sus posibilidades de realización más alta, la misoginia que sostiene el orden social resulta alarmante. El objetivo del trabajo es comprender la estructura simbólica que alienta la violencia, mediante una reflexión crítica sobre sus posibilidades de transformación. La conclusión a la que llega es que, aunque la estructura simbólica de la dominación sexual opera imperceptiblemente para justificar lo que debería ser condenado de forma generalizada, el desarrollo de la sensibilidad actual ofrece una posibilidad de identificar agravios que antes no se reconocían.
Palabras clave: Orden simbólico, Violencia, Feminicidio, Hermenéutica, Misoginia.
IMPROVED EXTRACTION OF BIOACTIVE COMPOUNDS FROM THE POLLENS OF TYPHA DOMINGENSIS WITH SEQUENTIAL CONVENTIONAL AND ULTRASOUND TREATMENT
Authors: AVCI Ayşe , CERİT İnci , HAMK Mohammed , YILMAZER KESKİN Semra
Published: February 2023

Typha domingensis pollen is obtained from staminate flowers of plant that is edible. In this study, bioactive compounds from pollen were extracted using ethanol and methanol with conventional method. Further ultrasonication was applied to the samples to improve extraction efficiency. The extraction yield was higher with ethanol (26.3±0.14%) than with methanol (25.4±0.3%) and applying ultrasonication increased the yields significantly (P <0.05). Total phenolic compounds in ethanol and methanol extracts were determined as 9.83±0.48 and 9.71±0.55 mg GAE/g dry matter with the conventional method, and 11.76±0.64 and 12.74±0.37 mg GAE/g dry matter after ultrasonication, respectively. The flavonoid content with ethanol extraction was significantly higher than with methanol in both conventional and ultrasonication methods (P <0.05). Antioxidant activities using DPPH, ABTS, CUPRAC, and FRAP tests, were determined, and enhanced antioxidant capacities were observed after ultrasonication. The bioactive compounds were qualitatively analyzed using UV-VIS spectroscopy and FTIR which confirmed the presence of polyphenols.
Preparation and characterization of a 3-dimensional macroporous bacterial cellulose scaffold for in vitro tissue engineering applications
Authors:   Department of Biotechnology Faculty of Science and Literature Mersin University, Mersin Turkey, Basaran Eroglu A. , Coral G. ,   Department of Biotechnology Faculty of Science and Literature Mersin University, Mersin Turkey
Published: February 2023

The increasing need for a new tissue engineering scaffold has revived interest in bacterial cellulose (BC) and its water holding capacity (WHC), porosity, and biocompatibility. Bacterial cellulose was produced using Gluconacetobacter xylinus, and bacterial cellulose film (BCF) was prepared by lyophilization. To obtain macroporous bacterial cellulose (MBCS), BCF was rinsed with poly(ethylene glycol) (PEG-400), adjusted to 0.25% BC concentration, and freeze-dried. The objective of this study to compare BCF and MBCS in terms of porosity, in vitro degradation, WHC, and the cell viability of mouse fibroblast cell line (NIH-3T3). The results showed that the MBCS has great potential for tissue engineering.
Fabrication of ZnO/MgO nanoparticles for catalytic pyrolysis of Phoenix dactylifera seeds biomass
Authors:   Institute of Chemistry, University of the Punjab, New Campus Lahore 54590, Pakistan, Din M. I. , Ali Z. ,   Institute of Chemistry, University of the Punjab, New Campus Lahore 54590, Pakistan, Hussain Z. ,   Institute of Chemistry, University of the Punjab, New Campus Lahore 54590, Pakistan, Khalid R. ,   Institute of Chemistry, University of the Punjab, New Campus Lahore 54590, Pakistan, Sharif A. ,   Institute of Chemistry, University of the Punjab, New Campus Lahore 54590, Pakistan, Intisar A. ,   Institute of Chemistry, University of the Punjab, New Campus Lahore 54590, Pakistan, Ahmed E. ,   Institute of Chemistry, University of the Punjab, New Campus Lahore 54590, Pakistan, Ameen S. ,   Institute of Chemistry, University of the Punjab, New Campus Lahore 54590, Pakistan, Arshad M. ,   Institute of Chemistry, The Islamia University of Bahawalpur, Pakistan
Published: February 2023

In this study slow catalytic pyrolysis of Phoenix dactylifera(date palm seeds) was investigated in fixed bed reactor in the presence of doped ZnO/MgOnanoparticles. These NPs were prepared by using homogenous precipitation method. The effect of catalytic dosage of doped ZnO/MgO and ZSM-5 was studied on the conversion of biomass into pyrolysis products. By using doped ZnO/MgO the production of bio oil was increased, further increasing reduced bio oil yield. ZSM-5 caused slight increase in the yield of bio oil. The yields of bio char and syn-gas were also affected by variable dosage of catalyst.
Comparison between lead free BaTio3/PDMS and doped - PZT/PDMS composite on ferroelectric characteristics
Authors:   National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Ilfov Romania, Amarande L. , Stancu V. ,   National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Ilfov Romania, Botea M. ,   National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Ilfov Romania, Toma V. ,   National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Ilfov Romania, Ciobanu R. ,   All Green SRL, Str. G. Cosbuc nr. 8, cod 700470, Iasi, Romania, Pintilie L. ,   National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Ilfov Romania
Published: February 2023

Composites of BaTiO3 (BT) and doped-PZT (d-PZT) micro-particles randomly dispersed in a PDMS matrix were prepared by a molding process. The morpho-structural characterization, performed by SEM and XRD, showed ceramic micro-grains of cubic BT and orthorhombic d-PZT, randomly dispersed in the PDMS matrix. Polarization (P) as a function of the applied field (E) was measured for composite samples, as well as for polymer samples. Hysteresis loops typical for a dielectric material were obtained, but also atypical ones, especially for higher fraction of polymer in composite, lower fields and shorter measuring periods, as a result of the dielectric relaxation in polymer and the presence of interfacial polarization charges at the contact between polymer and ferroelectric. All these composites show very low polarizations (less than 0.2 µC/cm2 and 0.05 µC/cm2 the maximum and remnant polarization, respectively), caused by the very low dielectric constant of the polymer (less than 10), which drastically reduces, up to 100 times, the electric field effectively applied to the ferroelectric. Weak pyroelectric response was recorded on BT/PDMS, but a typical behavior of a pyroelectric detector was observed. A figure of merit of the material which exceeds 10-4 m 2 /C was estimated.
Effects of high temperature wear and corrosion behaviour of sintered titanium reinforced with vanadium particle
Authors:   Assistant Professor, Department of Aeronautical Engineering, Nehru Institute of Engineering and Technology, Coimbatore, Tamilnadu, India, Senthamilselvi A. , Maniarasan P. ,   Professor, Department of Aeronautical Engineering, Nehru Institute of Engineering and Technology, Coimbatore, Tamilnadu, India, Murugarajan A. ,   Professor, Department of Aeronautical Engineering, Nehru Institute of Engineering and Technology, Coimbatore, Tamilnadu, India
Published: February 2023

The present investigation deals the high temperature wear and corrosion behavior of sintered Titanium (Ti) reinforced with vanadium (V) particles with various wt. % such as 3, 6 and 9. The surface morphology followed to that elemental confirmation of the sintered composites were identified using Scanning Electron Microscope (SEM) embedded with Electron Dispersive Spectroscopy (EDS). The high temperature wear behavior of the sintered composites was evaluated using pin on disc apparatus with varying the operating temperature (50°, 100° and 150°C). By using TAFEL exploration the corrosion behavior of the composites were assessed. The results revealed that Ti reinforced with 6 % of V possessed better wear resistant and corrosion resistance properties. Furthermore, the surface morphological changes of wear and corrosion behavior after experimentation were viewed using SEM.
Comparison of NiCrAl-diatomite, nickel graphite and Ag-Cu alloy thermal spraying
Authors:   School of Mechanical & Automotive Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, Shandong, 250353, PR China, Ju C. , Li Q. ,   School of Material Science & Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, Shandong, 250353, PR China, Wang Z. L. ,   School of Mechanical & Automotive Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, Shandong, 250353, PR China, Song Q. H. ,   School of Mechanical & Automotive Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, Shandong, 250353, PR China, Sun Z. P. ,   School of Mechanical & Automotive Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, Shandong, 250353, PR China, Zhang Y. F. ,   School of Mechanical & Automotive Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, Shandong, 250353, PR China
Published: February 2023

NiCrAl-diatomite coatings, nickel graphite coatings and Ag-Cu alloy coatings prepared by thermal spraying were used to study the reaction mechanism. The compositions of NiCrAl-diatomite, nickel graphite and Ag-Cu alloy powders and coatings were investigated by X-ray diffraction. The powders were analyzed by thermogravimetric differential thermal analysis and scanning electron microscopy. The powders and coatings were compared and found to have the same phase by X-ray diffraction. Thermogravimetric differential thermal analysis of the powders showed that NiCrAl-diatomite was almost stable below 800 °C. Ag-Cu alloy coating and nickel graphite coating cannot be used at temperatures above 700 °C and 400 °C, respectively.
Investigations on non-biodegradable zirconium dioxide reinforced aluminium alloy (AA6081) matrix composite developed by using powder metallurgy route
Authors:   School of Mechanical Engineering, Sathyabama Institute of Science and Technology, Chennai, India, Kavitha K. R. , Prakash S. ,   School of Mechanical Engineering, Sathyabama Institute of Science and Technology, Chennai, India, Ravichandran M. ,   Department of Mechanical Engineering, K. Ramakrishnan College of Engineering, Trichy, 621 112, India
Published: February 2023

Aluminium alloy (AA6081) composites reinforced with Zirconium Dioxide (ZrO2) have been produced through Powder Metallurgy (PM). The ZrO2 particles have been included in the matrix based on the weight percentages to produce various compositions such as AA6081- 2 wt. % ZrO2, AA6081- 4 wt. % ZrO2, AA6081- 6 wt. % ZrO2 and AA6081- 8 wt. % ZrO2. The Crystallographic Structure of a material and Surface topology and composition analysis was conducted for the green and sintered composite samples. Theoretical density, green and sintered density of the samples has been reported. The wear rate (WR) of the AA6081- 8 wt. % ZrO2 composite was studied using Pin on disc (POD). Taguchi was applied to study the wear parameters (Load P; Sliding distance D; Sliding velocity V) and the systematic and statistical analysis was conducted by L9 array. The mechanical properties such as hardness, compressive strength (CS) and impact strength was enhanced for the inclusion of ZrO2 particles in the AA6081 matrix up to 8 wt. %. Wear studies of AA6081- 8 wt. % ZrO2 composite revealed that the P is the most dominant factor for WR. ANOVA analysis revealed that load is highly contributed parameter for the WR of the PM composite.
Populus ciliata conjugated of iron oxide nanoparticles and their potential antibacterial activities against human bacterial pathogens
Authors:   Department of Chemistry, University of Azad Jammu & Kashmir, Muzaffarabad, Azad Kashmir, Pakistan, Hafeez M. , Shaheen R. ,   Department of Chemistry, University of Azad Jammu & Kashmir, Muzaffarabad, Azad Kashmir, Pakistan, Ali S. ,   Applied Entomology and Medical Toxicology Laboratory, Government College University, Lahore, Pakistan, Shakir H. A. ,   Institute of Zoology, The University of the Punjab, Lahore, Pakistan, Irfan M. ,   Department of Biotechnology, University of Sargodha, Sargodha, Pakistan, Mughal T. A. ,   Applied Entomology and Medical Toxicology Laboratory, Government College University, Lahore, Pakistan, Hassan A. ,   Applied Entomology and Medical Toxicology Laboratory, Government College University, Lahore, Pakistan, Khan M. A. ,   Green Hills Science College Muzaffarabad AJK, Pakistan, Mumtaz S. ,   Applied Entomology and Medical Toxicology Laboratory, Government College University, Lahore, Pakistan
Published: February 2023

Green synthesis is gaining huge significance because of its environmentally harmonious nature and low cost. This is an important technique to synthesize metal oxide nanoparticles. In the current study, iron oxide nanoparticles (Fe2O3-NPs) were formulated by using Populus ciliata leaf extract and ferrous sulphate (FeSO4.7H2O). These NPs were analyzed by X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Fourier Transform Spectroscopy (FT-IR), and Energy Dispersive X-ray (EDX). The synthesized NPs were used against Gram positive and negative bacteria to find their bactericidal potential. These NPs were found active against Klebsiella pneumonia, Escherichia coli, Bacillus (B) lichenifermis and B. subtilis. B. licheniformis showed the highest antibacterial activity (zone of inhibition) up to 29.1±0.5 mm at 8 mg/mL concentration. This study concludes that Populus ciliata conjugated Iron oxides NPs could be used a potential antibacterial agent.
Study on plasma-spraying of MCrAlY coatings
Authors:   School of Mechanical & Automotive Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, Shandong, 250353, PR China, Wang Z. L. , Li Q. ,   School of Material Science & Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, Shandong, 250353, PR China, Ju C. ,   School of Mechanical & Automotive Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, Shandong, 250353, PR China, Song Q. H. ,   School of Mechanical & Automotive Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, Shandong, 250353, PR China, Sun Z. P. ,   School of Mechanical & Automotive Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, Shandong, 250353, PR China, Zhang Y. F. ,   School of Mechanical & Automotive Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, Shandong, 250353, PR China
Published: February 2023

In this paper, two kinds of MCrAlY coatings were prepared by atmospheric plasma spraying. The powders and coatings were characterized with scanning electron microscopy and energy dispersive spectrometry. X-ray diffraction and thermogravimetry differential thermal analysis were used to qualitatively analyze the phase. The change of powder mass with time and the change of heat absorption and exothermic were measured, and then the generation of new material was analyzed. It was found that the melting effect of the two kinds of powder by plasma spraying was good, and coating with high temperature oxidation resistance and hot corrosion resistance can be prepared. Both powders weight increased when heated in air, which indicates that oxidation occurs when the temperature rose. The main composition of NiCrAlY coating was γ′-Ni3Al, while NiCoCrAlYTa coating contained several kinds of NiAl composites.
Study of synthesis, characterization and thermo physical properties of Al2O3-SiO2-TiO2 / H2O based tri-hybrid nanofluid
Authors:   Assistant professor, Department of Mechanical Engineering, Veltech Rangarajan Dr.Sagunthala R and D Institute of Science and technology, Avadi, Chennai600062, Tamilnadu, India, Palanisamy R. , Parthipan G. ,   Associate professor, Department of Physics, Veltech Multitech Dr.Rangarajan Dr.Sagunthala Engineering college, Avadi, Chennai-600062, Tamilnadu, India, Palani S. ,   Associate professor, Department of Mechanical Engineering, Veltech Multitech Dr.Rangarajan Dr.Sagunthala Engineering College, Avadi, Chennai-600062, Tamilnadu, India
Published: February 2023

The prediction of behavior of thermo physical properties is essential to understand the heat transfer characteristics of any nanofluid. In the present work the tri hybrid oxide nanoparticles namely Al2O3, SiO2 and TiO2 of three different ratios are prepared at 0.1% concentration and their characterization and thermo physical properties are examined. The water is used as the base fluid and the sample is made for 100 ml. The nanoparticles are dispersed with the base fluid by magnetic stirring and followed by ultra-sonication. The stability is also found to be good under zeta potential test. The experimentation results showed that the thermo physical properties are better than that of base fluid. The thermal conductivity maximum enhancement was found to be 18.33% from the base fluid at just 0.1% concentration at 50⁰ C. The maximum viscosity enhancement is found to be as 43.79% than that of base fluid. The experimental results are compared and validated with the available literature based mathematical models and similar works of other authors and found to be of good matching. The maximum deviation from the model correlation is below 1%. This novel tri hybrid nanofluid is effective alternative for many di-hybrid nanofluids and has better thermo physical properties than oxide based di hybrid nanofluids.
Influence of yttrium doping on ZnO nanoparticles for enhanced photocatalytic degradation of methylene blue
Authors:   Department of Chemistry, Faculty of Liberal Arts and Science, Kasetsart University Kamphaeng Saen Campus, Nakhon Pathom 73140, Thailand, Rungsawang T. , Sujinnapram S. ,   Department of Physics, Faculty of Liberal Arts and Science, Kasetsart University Kamphaeng Saen Campus, Nakhon Pathom 73140, Thailand, Nilphai S. ,   Physics Program, Department of Science and Technology, Faculty of Liberal Arts and Science, Roi Et Rajabhat University, Thailand, Wongrerkdee S. ,   Department of Physics, Faculty of Liberal Arts and Science, Kasetsart University Kamphaeng Saen Campus, Nakhon Pathom 73140, Thailand
Published: February 2023

In this work, Y-doped ZnO nanoparticles were precipitately synthesized for various yttrium molar percentage values ranging from 0 to 5%, and then utilized as photocatalysts to demonstrate methylene blue degradation. Morphology shows that the particle size of pure ZnO is 113.7733.26 nm, which is reduced to the minimum value less than one-third for the Y-doped ZnO samples. As a result, surface-to-volume ratios of Y-doped ZnO samples have successfully increased due to their decreased size. This decrease in particle size is consistent with the small crystalline size, primarily due to low crystallization in the presence of yttrium doping. However, the expansion of the crystal structure is observed. Chemical surface structures point to the major vibration of ZnO. However, some carbon-relating groups remain to appear. Optical property reveals similar trends for all Y-doped ZnO samples. The estimated band gap energy (Eg) was reduced to the minimum value for the 4 mol% condition. For use as a photocatalyst, the appropriate Y-doped ZnO for 4 mol% yttrium doping presents the maximum degradation efficiency of 61.19%. The improvement in photocatalytic degradation is caused by the synergy of decreased particle size and reduced Eg. Therefore, yttrium plays a role to decrease particle size and reduce Eg of Y-doped ZnO materials, thus leading to enhance photocatalytic performance.
Combustion synthesis and characterization of visible-light-driven Tm-doped ZnO nanoparticles used for photodegradation of methylene blue
Authors:   Division of Physical Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand, Karnchana N. , Phuruangrat A. ,   Division of Physical Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand, Thongtem S. ,   Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand, Thongtem T. ,   Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
Published: February 2023

Tm-doped ZnO nanoparticles were synthesized by a tartaric acid-assisted combustion method and followed by calcination at 600 oC for 2 h. Phase and morphology of assynthesized ZnO with and without Tm dopant were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). The analytical results certified that Tm3+ ions were incorporated in hexagonal wurtzite ZnO structure. The particle size of ZnO was decreased with increasing in the weight content of Tm3+ dopant because the grain boundary growth of ZnO was hindered by Tm3+ dopant. The particle sizes of ZnO, 1% Tm-doped ZnO, 3% Tm-doped ZnO and 5% Tm-doped ZnO nanoparticles are 72.09 ± 17.37 nm, 32.77 ± 11.08 nm, 23.08 ± 4.61 nm and 25.27 ± 6.03 nm, respectively. The photocatalytic activity of as-synthesized ZnO with and without Tm dopant was evaluated through the degradation of methylene blue (MB) under visible light irradiation. In this research, 3% Tm-doped ZnO nanoparticles have the highest photocatalytic activity of 97.75% under visible light irradiation within 100 min. Active spices used for degradation of MB photocatalyzed by 3% Tm-doped ZnO nanoparticles were also investigated.
Preparation of La-Nd co-doped ZnO nanospheres and application on effluent treatment containing reactive dyes
Authors:   School of Textiles and Fashion, Shanghai University of Engineering Science, Shanghai 201620, China, Cao L. Q. , Wang L. M. ,   School of Textiles and Fashion, Shanghai University of Engineering Science, Shanghai 201620, China, Xie M. R. ,   School of Textiles and Fashion, Shanghai University of Engineering Science, Shanghai 201620, China, Xu L. H. ,   School of Textiles and Fashion, Shanghai University of Engineering Science, Shanghai 201620, China, Shen Y. ,   School of Textiles and Fashion, Shanghai University of Engineering Science, Shanghai 201620, China, Hao H. M. ,   School of Textiles and Fashion, Shanghai University of Engineering Science, Shanghai 201620, China
Published: February 2023

Zinc oxide (ZnO) nanospheres and La-Nd co-doped spherical ZnO composite were prepared by solvothermal method with zinc chloride and urea, ethylene glycol (EG) as morphology controller, to obtain excellent photocatalytic effect and degradation of pollutants containing reactive dyes. The morphology, structure and chemical composition were described by scanning electron microscopy (SEM), X-ray diffractometry (XRD), X-ray photoelectron spectroscopy (XPS) and diffuse reflection spectrum (DRS). The results showed that the size of La-Nd co-doped spherical ZnO about 130 nm, and the XRD results showed sharper characteristic peak. Meanwhile, the band gap of 2%La-1%Nd co-doped ZnO reduced from 3.23 eV to 2.97 eV. The degradation of effluent treatment containing reactive dyes like reactive red 24 (RR24) or reactive yellow 145 (RY145) was reached 99.99% under UV illumination for 75 min with 2%La-1%Nd co-doped ZnO as catalyst, which showed remarkable photocatalytic performance. After 120 min, removal efficiencies of chemical oxygen demand (COD) and total organic carbon (TOC) for RR24 discharge liquid attained 76.68% and 73.16% respectively, meanwhile, COD and TOC removal efficiencies for RY145 discharge liquid reached 76.32% and 72.36%.
Development of pyrotechnic delay mixtures based on a composite material hardened with carbon nanotubes
Authors:   Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan, Gabdrashova S. E. , Tulepov M. I. ,   Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan, Korchagin M. A. ,   Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630128, Russia, Sassykova L. R. ,   Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan, Abdrakova F. Yu. ,   Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan, Bexultan Zh. B. ,   Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan, Aitenov Y. K. ,   Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan, Toktagul S. E. ,   Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan, Baiseitov D. A. ,   Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan
Published: February 2023

This work is devoted to the development of pyrotechnic delay mixtures from a titanium matrix reinforced with carbon nanotubes using a combination of preliminary mechanical activation and thermal explosion. The phase and structural transformations of the Ti-CNTs mixtures were analyzed by microscopy and X-ray diffraction. The combustion temperature is practically independent of pressure, it remains constant over the entire range of argon pressure. These delay compositions are not sensitive to different mechanical influences. It is proved that certain amount of CNTs added to delay composition can increase delay precision and further doing so achieved less temperature dependence. The retardant compositions BaCrO4 + Ti / CNT containing carbon nanotubes have the improved characteristics of the retardant composition, such as delay accuracy, combustion stability. The developed retarding compositions are safe in production and at all stages of circulation.
Cell sorters see things more clearly now
Authors: Schraivogel Daniel , Steinmetz Lars M
Published: February 2023

Microscopy and fluorescence‐activated cell sorting (FACS) are two of the most important tools for single‐cell phenotyping in basic and biomedical research. Microscopy provides high‐resolution snapshots of cell morphology and the inner workings of cells, while FACS isolates thousands of cells per second using simple parameters, such as the intensity of fluorescent protein labels. Recent technologies are now combining both methods to enable the fast isolation of cells with microscopic phenotypes of interest, thereby bridging a long‐standing gap in the life sciences. In this Commentary, we discuss the technical advancements made by image‐enabled cell sorting and highlight novel experimental strategies in functional genomics and single‐cell research.
Przestrzeń kadru/poza kadrem. O fotograficznych ujęciach w Idzie i Zimnej wojnie Pawła Pawlikowskiego
Authors:   Instytut Nauk o Kulturze, Uniwersytet Śląski w Katowicach, Kita Barbara
Published: February 2023

The following discussion concentrates on the shaping of film space, frame composition and what happens beyond the frame. The objectiveis to explore the aesthetics of the films, resulting primarily from the juxtaposition of photographic (in vivo) shots with moving film images. The non-standard composition of the frames in both films, based on shifting the centre to the edge of the frame (deframing) and the multiplication of additional frames (over-framing): windows, doors, doorframes, etc. resultin a significant play on space. Such creative use of the formal strategies and still (photographic) images forces the viewer to reflecton the destinyof the protagonists. The stillness and silence so often used in both films, are objective aspects of photography, but above all of death, which from the beginning accompanies Pawlikowski’s protagonists: Wanda, Ida, Zulaand Wiktor.
Zamknięci w nieskończonej otchłani. Przestrzeń kosmiczna (i jej poetyka)w filmach dokumentalnych Wernera Herzoga
Authors:   Instytut Nauk o Kulturze, Uniwersytet Śląsk, Kempna-Pieniążek Magdalena
Published: February 2023

The subject of the article is the poetics of outer space in Werner Herzog’s documentaries. The author discusses The Wild Blue Yonder(2005), Fireball: Visitors from Darker Worlds (2020) and Last Exit: Space(2022, directed by R. Herzog, produced by W. Herzog), focusing on three main themes. The first of them is the paradox of confinement in infinite openness. Unlike standard space documentaries, which emphasise the vastness of outerspace and its enormous range of exploration possibilities, Herzog portraysthe deep universe as an area in which humanity is doomed to be confined. The second theme is the confrontation of two possible ways of penetrating the cosmos: in Herzog’s films, the utopian project of interstellar voyages is confronted with the benefits of deep space observations. The third motif is of an aesthetic nature: the images of outer space in Werner Herzog’s films are decontextualised in a different way than the landscapes presented in his other works.
Ćwiczenia z Pasoliniego – Pier Paolo Pasolini w podróży przez Italię (La lunga strada di sabbia)
Authors:   Instytut Literaturoznawstwa, Uniwersytet Śląski w Katowicach, Kamińska Di Giannantonio Gulia
Published: February 2023

The article analyses a holiday reportage La lunga strada di sabbia [TheLong Road of Sand] by Pier Paolo Pasolini, which is a record ofa journeymade by the Italian intellectual in 1959 along the coasts of Italian Penisula. The author seeks the answers to the following questions: Howdoes Pasolini talk about his journey? Which elements of the journey and theworld are the most important to the writer? She concludes that Pasolini uses thestrategy of holiday reportage to touch upon the essential themes of his laterworks – ordinary people, their living conditions, the pace of socio-economic changes. At the same time, Pasolini uses the literary genre of reportage to present a broader than usual affective spectrum.
Zbieranie okruchów rzeczywistości. Opowieść Sylwii Chutnik o życiu codziennym warszawiaków w połowie lat 50. XX wieku
Authors:   Wydział Filologiczny, Uniwersytet w Białymstoku, Sidoruk Elżbieta
Published: February 2023

The article discusses Sylwia Chutnik’s book Miasto zgruzowstałe. Codzienność Warszawy w latach 1954–1955[The city rising from ruins. Daily life inWarsaw in the years 1954–1955] (Warsaw 2020). Analysing the selection of source materials, the methodology and the structure of the work, theauthor of the review points to a clear link between Chutnik’s field of interest as a cultural studies scholar, her writing and social activism. In the reviewer’s opinion, both the method of presenting the problems and the emotional attitude to her hometown, visible in the narrative, testify to Chutnik’s engaged attitude as a researcher.
Isolasi dan Elusidasi Senyawa Flavonoid dari Biji Alpukat (Persea americana Mill.)
Authors: Feliana Kiki , Mursiti Sri , Harjono Harjono
Published: February 2023

Avocado (Persea americana Mill.) is a plant that can flourish in tropical regions like Indonesia. Avocado seeds have the hypoglycemic effect and can be used for traditional medicine. The ethanol extract of avocado seeds contains several secondary metabolite compounds such as alkaloids, triterpenoids, tannins, flavonoids, and saponins. Aims of this study are to identify groups and structures of flavonoid compounds in avocado seeds. 4,000 g of avocado seed powder produces ethanol 170 gcondensed extract with maseration process. 100 g of viscous ethanol extract using ethyl acetate and water yielded 25.6 g of ethyl acetate extract with partition process. The separation of ethyl acetate extract by Thin Layer Chromatography (TLC) with G-F254 stationary phase and n-butanol mobile phase : acetic acid: water (BAA) phase (4:1:5) produces positive fractions containing flavonoids.Results of avocado seeds isolate analysis with FT-IR showed that isolate has OH functional group, CH aliphatic, C=O, C=C aromatics, and CH aromatic, while analysis with UV-Vis spectrophotometer showed the absorption peak at 285 nm and 320 nm wavelength, so the hypothesis of isolate is flavonoid compound flavanon group with hydroxy group at C-7 atom.