bluuebunny/crossref_metadata_2025 huggingface dataset:
Construction of Cu-based MOFs with enhanced hydrogenation performance by integrating open electropositive metal sites
Authors: Zhang Xiuling , Geng Longlong , Zhang Yong-Zheng , Zhang Da-Shuai , Zhang Ranhui , Fu Junna , Gao Jun , Carozza Jesse C. , Zhou Zheng , Han Haixiang
Published: August 2019

A kind of new Cu(ii)-MOF with open electropositive metal Cu sites exhibits excellent activity, selectivity and reusability in hydrogenation of 4-nitrophenol to 4-aminophenol under mild conditions (25 °C, 1 atm).
Polymorphism and resulting luminescence properties of 1-acetylpyrene
Authors: Tchoń Daniel , Trzybiński Damian , Wrona-Piotrowicz Anna , Makal Anna
Published: August 2019

Crystal packing, not just the presence of acetyl groups, determines luminescence properties of crystalline 1-acetyl-pyrene.
A simple heuristic approach to estimate the thermochemistry of condensed-phase molecules based on the polarizable continuum model
Authors: Izato Yu-ichiro , Matsugi Akira , Koshi Mitsuo , Miyake Atsumi
Published: August 2019

A simple model based on a quantum chemical approach with polarizable continuum models (PCMs) to provide reasonable translational and rotational entropies for liquid phase molecules was developed.
Probing the structure of giant fullerenes by high resolution trapped ion mobility spectrometry
Authors: Weis Patrick , Hennrich Frank , Fischer Regina , Schneider Erik K. , Neumaier Marco , Kappes Manfred M.
Published: August 2019

We present high-resolution trapped ion mobility spectrometry (TIMS) measurements for fullerene ions in molecular nitrogen.
Controlled intramolecular H-transfer in malonaldehyde in the electronic ground state mediated through the conical intersection of 1nπ* and 1ππ* excited electronic states
Authors: Nandipati K. R. , Kanakati Arun Kumar , Singh H. , Mahapatra S.
Published: August 2019

We report photo-isomerization of malonaldehyde in its electronic ground state (S0), mediated by coupled 1nπ*(S1)–1ππ*(S2) excited electronic states, accomplished with the aid of optimally designed ultraviolet (UV)-laser pulses.
Influence of halogen bonding on gold(i)–ligand bond components and DFT characterization of a gold–iodine halogen bond
Authors: Buttarazzi Edoardo , Rosi Francesco , Ciancaleoni Gianluca
Published: August 2019

A gold(i) complex bearing nitrogen acyclic carbene (NAC) and selenourea (SeU) has been used to verify whether the second-sphere Se⋯I halogen bond (XB) is able to modify the Dewar–Chatt–Duncanson components of the Au–C and Au–Se bonds.
Nanocavity effects of various zeolite frameworks on n-pentane cracking to light olefins: combination studies of DFT calculations and experiments
Authors: Thivasasith Anawat , Maihom Thana , Pengpanich Sitthiphong , Wattanakit Chularat
Published: August 2019

Better control of light olefin product selectivity (ethylene and propylene) on various zeolite frameworks (H-FER, H-ZSM-5 and H-FAU) obtained from n-pentane catalytic cracking has attracted considerable attention from both scientific and petrochemical industrial viewpoints.
Production of high-yield short-chain oligomers from cellulose via selective hydrolysis in molten salt hydrates and separation
Authors: Liu Qiyu , Ma Qiaozhi , Sabnis Sanket , Zheng Weiqing , Vlachos Dionisios G. , Fan Wei , Li Wenzhi , Ma Longlong
Published: August 2019

Stepwise process of cellulose being hydrolyzed into oligomers in MSH followed by product separation.
Shift of ionization equilibrium in spatially confined laser induced plasma
Authors: Zakuskin Aleksandr S. , Popov Andrey M. , Labutin Timur A.
Published: August 2019

Spatial confinement of laser-induced plasma leads to shift of ionization equilibrium and can improve determination of elements by their resonant atomic lines.
Liquid marbles as biochemical reactors for the polymerase chain reaction
Authors: Sreejith Kamalalayam Rajan , Gorgannezhad Lena , Jin Jing , Ooi Chin Hong , Stratton Helen , Dao Dzung Viet , Nguyen Nam-Trung
Published: August 2019

Liquid marbles can serve as a biochemical reactor for the polymerase chain reaction, eliminating the conventional single use plastic reaction vial.
Conjugated polymer dots for biocompatible siRNA delivery
Authors: Wang Fei , Chen Haobin , Liu Zhihe , Mi Feixue , Fang Xiaofeng , Liu Jie , Wang Mingxue , Lo Pik Kwan , Li Qiong
Published: August 2019

The constructed nanoplatform not only retained the outstanding fluorescence properties and biocompatibility but also enhanced delivery efficiency of siRNA.
Stable lead-free Te-based double perovskites with tunable band gaps: a first-principles study
Authors: Liu Diwen , Li Qiaohong , Zhang Zhang , Wu Kechen
Published: August 2019

Lead-free hybrid perovskites have attracted great attention as environmentally friendly light absorber layers.
Synergy of sp-N and sp2-N codoping endows graphdiyne with comparable oxygen reduction reaction performance to Pt
Authors: Kang Baotao , Wu Si , Ma Jiapeng , Ai Hongqi , Lee Jin Yong
Published: August 2019

Nitrogen doped graphdiyne (NGDY) has been reported to have comparable oxygen reduction reaction (ORR) performance to Pt-based catalysts.
FM0807 decelerates experimental arthritis progression by inhibiting inflammatory responses and joint destruction via modulating NF-κB and MAPK pathways
Authors: Zhang Nanwen , Liu Zhiwei , Luo Hongbin , Wu Weifang , Nie Kaimei , Cai Lin , Tan Shuangyu , Chen Xiaole , Huang Ying , Liu Jiaxing , Lv Meina , Zhang Xin , Fan Yun , Lin Yuying , Ye Shennan , Liu Yang , Wu Lixian , Xu Jianhua
Published: August 2019

Background: Rheumatoid arthritis (RA) is a chronic articular synovial inflammatory disease. The precise etiology underlying the pathogenesis of RA remains unknown. We aimed to investigate the inhibitory effect of curcumin analog FM0807 (curcumin salicylate monoester, 2-hydroxy-, 4-[(1E,6E)-7-(4-hydroxy-3-methoxyphenyl)-3,5-dioxo-1,6-heptadien-1-yl]-2-methoxyphenyl ester) on experimental RA and investigate its possible mechanisms of action.

Method: Rats with Freund’s complete adjuvant (FCA)-induced arthritis (AIA) were administered aspirin (0.1 mmol.kg−1), curcumin (0.1 mmol.kg−1), FM0807 (0.1, 0.2 mmol.kg−1) and vehicle via gastric gavage, from days 7 to 21, once daily. The hind paw volume and arthritis index (AI) were measured, and radiographic and histological examinations were performed. Twenty-one days later, the animals were killed and left ankle joints were removed to measure protein expression of the elements of the nuclear factor κB (NF-κB) and mitogen-activated protein kinase (MAPK) pathway by Western blot analysis. The enzyme-linked immunosorbent assay (ELISA) was employed to measure synovial fluid levels of tumor necrosis factor-α (TNF-α), interleukin (IL)-6, IL-1β and IL-10.

Results: Compared with AIA group, FM0807 reduced the AI and swelling of the injected hind paw in a dose-dependent manner, and inhibited increases in inflammatory cell infiltration, pannus formation and cartilage destruction. FM0807 also potently attenuated the increase in the expression of inflammatory factors TNF-α, IL-6 and IL-1β in synovial fluid, while IL-10 levels were also elevated. FM0807 significantly suppressed phosphorylation of extracellular-signal-regulated kinase (ERK) 1/2 (ERK1/2), c-Jun-N-terminal kinase (JNK) 1/2 (JNK1/2), p38MAPK, inhibitor of NF-κB kinase (IKK), IκB and NF-κB p65 protein, (all P<0.05), which displayed more potential effects compared with those of the aspirin and curcumin groups.

Conclusion: FM0807 exerts its therapeutic effects on RA by inhibiting cartilage degeneration. FM0807 treatment might be an effective therapeutic approach for RA.
ResNet‐based Trojan detection methodology for protected ICs
Authors: Yu Weize , Wen Yiming , Huang Xueqing
Published: August 2019

Hardware Trojan detection plays a significant role in building a trusted integrated circuit (IC) industry. Unfortunately, the conventional Trojan detection techniques may fail when the feature of the embedded Trojan is masked by the feature of the random side‐channel leakages. To overcome the constraint, in this Letter, a novel machine learning technique based on residual neural networks (ResNet) is proposed to classify the different features to achieve the Trojan detection. In the proposed Trojan detection methodology, two different Trojan‐free IC chips are used for training the ResNet to study the feature of the random side‐channel leakages. Subsequently, a suspected IC chip is tested by the well‐trained ResNet to infer whether the feature associated with the suspected IC chip is caused by the random side‐channel leakages or the embedded Trojan. As demonstrated in the result, after enabling about 250,000 data to train the ResNet, the hardware Trojan can be detected by using the proposed methodology.
Robust reputation management mechanism in cooperative spectrum sensing
Authors: Wu Jun , Yu Yue , Song Tiecheng , Hu Jing
Published: August 2019

Cooperative spectrum sensing (CSS) is the key function of cognitive radio system to identify the available spectrum. However, cooperative paradigms are prone to be threatened by Byzantine attack, and the effect of extensive Byzantine mitigation methods adopting the global decision (GD) as the reputation management mechanism (RMM) is not satisfactory in some instance. In this Letter, according to the delivery of the transmitted data, the authors propose a data transmission status (DTS) in CSS, which is easily implemented without unrealistic assumptions about Byzantine attack. Compared with the GD, simulation results show that the DTS is a robust RMM and provides better CSS performance, even functions well in the blind scenario.
BD‐VSS individual weighting factor sign based adaptive filter control for power quality improvement in weak distribution grid
Authors: Singh Sunaina , Kewat Seema , Singh Bhim , Panigrahi B.K. , Kushwaha Manoj Kumar
Published: August 2019

This study presents the control of distribution static compensator (DSTATCOM) using band‐dependent variable step size (BD‐VSS) individual weighting factor with sign error based adaptive filter for power quality improvement in a weak distribution grid. Here, the proposed algorithm is used for estimation of fundamental active weight components from the distorted load currents in order to generate the reference grid currents to mitigate the grid currents power quality issues. This new control algorithm is proposed for fast and accurate estimation of active weight components with low steady‐state error, without dynamic oscillation at fast convergence speed. Moreover, the frequency locked loop‐double self‐tuning second‐order generalised integrator based voltage filter is used to extract the positive sequence voltages of the distorted grid voltages for estimating the harmonics, and noise‐free voltage unit templates. Therefore, the DSTATCOM with the proposed control algorithm is capable of mitigating the harmonic currents, providing reactive power compensation and operating at unity power factor in a weak distribution grid. Test results demonstrate the viability and robustness of the proposed control algorithm under balanced and unbalanced non‐linear load conditions.
VIS3COS
Authors: Paulino-Afonso Ana , Sobral David , Darvish Behnam , Ribeiro Bruno , van der Wel Arjen , Stott John , Buitrago Fernando , Best Philip , Stroe Andra , Craig Jessica E. M.
Published: August 2019

We study the impact of local density and stellar mass on the structure and morphology of approximately 500 quiescent and star-forming galaxies from the VIMOS Spectroscopic Survey of a Superstructure in COSMOS (VIS3COS). We perform bulge-to-disc decomposition of the surface brightness profiles and find ∼41 ± 3% of > 1010 M⊙ galaxies to be best fitted with two components. We complement our analysis with non-parametric morphological measurements and qualitative visual classifications. We find that both galaxy structure and morphology depend on stellar mass and environment for our sample as a whole. We only find an impact of the environment on galaxy size for galaxies more massive than 1011 M⊙. We find higher Sérsic indices (n) and bulge-to-total ratios (B/T) in high-density regions when compared to low-density counterparts at similar stellar masses. We also find that galaxies with higher stellar mass have steeper light profiles (high n, B/T) compared to galaxies with lower stellar mass. Using visual classifications, we find a morphology–density relation at z ∼ 0.84 for galaxies more massive than 1010 M⊙, with elliptical galaxies being dominant at high-density regions and disc galaxies more common in low-density regions. However, when splitting the sample into colour–colour-selected star-forming and quiescent sub-populations, there are no statistically significant differences between low- and high-density regions. We find that quiescent galaxies are smaller, have higher Sérsic indices (for single profiles, around n ∼ 4), and higher bulge-to-total light ratios (for decomposed profiles, around B/T ∼ 0.5) when compared to star-forming counterparts (n ∼ 1 and B/T ∼ 0.3, for single and double profiles, respectively). We confirm these trends with non-parametric quantities, finding quiescent galaxies to be smoother (lower asymmetry, lower M20) and to have most of their light over smaller areas (higher concentration and Gini coefficient) than star-forming galaxies. Overall, we find a stronger dependence of structure and morphology on stellar mass than on local density and these relations are strongly correlated with the quenching fraction. The change in average structure or morphology corresponds to a change in the relative fractions of blue disc-like galaxies and red elliptical galaxies with stellar mass and environment. We hypothesise that the processes responsible for the quenching of star formation must also affect the galaxy morphology on similar timescales.
Using Herschel and Planck observations to delineate the role of magnetic fields in molecular cloud structure
Authors: Soler Juan D.
Published: August 2019

We present a study of the relative orientation between the magnetic field projected onto the plane of sky (B⊥) on scales down to 0.4 pc, inferred from the polarized thermal emission of Galactic dust observed by Planck at 353 GHz, and the distribution of gas column density (NH) structures on scales down to 0.026 pc, derived from the observations by Herschel in submillimeter wavelengths, toward ten nearby (d < 450 pc) molecular clouds. Using the histogram of relative orientation technique in combination with tools from circular statistics, we found that the mean relative orientation between NH and B⊥ toward these regions increases progressively from 0°, where the NH structures lie mostly parallel to B⊥, with increasing NH, in many cases reaching 90°, where the NH structures lie mostly perpendicular to B⊥. We also compared the relative orientation between NH and B⊥ and the distribution of NH, which is characterized by the slope of the tail of the NH probability density functions (PDFs). We found that the slopes of the NH PDF tail are steepest in regions where NH and B⊥ are close to perpendicular. This coupling between the NH distribution and the magnetic field suggests that the magnetic fields play a significant role in structuring the interstellar medium in and around molecular clouds. However, we found no evident correlation between the star formation rates, estimated from the counts of young stellar objects, and the relative orientation between NH and B⊥ in these regions.
Observational constraints on the origin of the elements
Authors: Bergemann Maria , Gallagher Andrew J. , Eitner Philipp , Bautista Manuel , Collet Remo , Yakovleva Svetlana A. , Mayriedl Anja , Plez Bertrand , Carlsson Mats , Leenaarts Jorrit , Belyaev Andrey K. , Hansen Camilla
Published: August 2019

Manganese (Mn) is a key Fe-group element, commonly employed in stellar population and nucleosynthesis studies to explore the role of SN Ia. We have developed a new non-local thermodynamic equilibrium (NLTE) model of Mn, including new photo-ionisation cross-sections and new transition rates caused by collisions with H and H− atoms. We applied the model in combination with one-dimensional (1D) LTE model atmospheres and 3D hydrodynamical simulations of stellar convection to quantify the impact of NLTE and convection on the line formation. We show that the effects of NLTE are present in Mn I and, to a lesser degree, in Mn II lines, and these increase with metallicity and with the effective temperature of a model. Employing 3D NLTE radiative transfer, we derive a new abundance of Mn in the Sun, A(Mn) = 5.52 ± 0.03 dex, consistent with the element abundance in C I meteorites. We also applied our methods to the analysis of three metal-poor benchmark stars. We find that 3D NLTE abundances are significantly higher than 1D LTE. For dwarfs, the differences between 1D NLTE and 3D NLTE abundances are typically within 0.15 dex, however, the effects are much larger in the atmospheres of giants owing to their more vigorous convection. We show that 3D NLTE successfully solves the ionisation and excitation balance for the RGB star HD 122563 that cannot be achieved by 1D LTE or 1D NLTE modelling. For HD 84937 and HD 140283, the ionisation balance is satisfied, however, the resonance Mn I triplet lines still show somewhat lower abundances compared to the high-excitation lines. Our results for the benchmark stars confirm that 1D LTE modelling leads to significant systematic biases in Mn abundances across the full wavelength range from the blue to the IR. We also produce a list of Mn lines that are not significantly biased by 3D and can be reliably, within the 0.1 dex uncertainty, modelled in 1D NLTE.
Heavy metal enrichment in the intermediate He-sdOB pulsator Feige 46
Authors: Latour M. , Dorsch M. , Heber U.
Published: August 2019

The intermediate He-enriched hot subdwarf star Feige 46 was recently reported as the second member of the V366 Aqr (or He-sdOBV) pulsating class. Feige 46 is very similar to the prototype of the class, LS IV − 14°116, not only in terms of pulsational properties, but also in terms of atmospheric parameters and kinematic properties. LS IV − 14°116 is additionally characterized by a very peculiar chemical composition, with extreme overabundances of the trans-iron elements Ge, Sr, Y, and Zr. We investigate the possibility that the similarity between the two pulsators extends to their chemical composition. We retrieved archived optical and UV spectroscopic observations of Feige 46 and performed an abundance analysis using model atmospheres and synthetic spectra computed with TLUSTY and SYNSPEC. In total, we derived abundances for 16 elements and provide upper limits for four additional elements. Using absorption lines in the optical spectrum of the star we measure an enrichment of more than 10 000× solar for yttrium and zirconium. The UV spectrum revealed that strontium is equally enriched. Our results confirm that Feige 46 is not only a member of the now growing group of heavy metal subdwarfs, but also has an abundance pattern that is remarkably similar to that of LS IV − 14°116.
Influences of Using B20 Reformulated Type Fuel on a Heavy-Duty Diesel Engine Performances
Authors: Rashid Adnan Kadhim , Radu Bogdan , Racovitza Alexandru , Chiriac Radu
Published: August 2019

Starting from the need to replace up to 20% of the energetic fuel content as European Regulations have already stipulated for the years to come, B20 mixture fuel proves to receive an increasing recognition nowadays as an appropriate and alternative fuel for Diesel engines. Studies have provided that B20 increases engine efficiency under specific operating conditions together with a significant drop of the main emissions’ levels. This paper is proposing a numerical analysis of the operating behavior of an IVECO Cursor 10 heavy-duty Diesel engine fueled with Diesel-Biodiesel B20 fuel, featuring the projections of the AMESIM simulation code.
Considerations on the combustion of biofuels in compression ignition engines
Authors: Fazal Um Min Allah , Bică Marin , Gruia Alexandru , Tutunea Dragoş , Călbureanu Mădălina
Published: August 2019

Biofuels are considered to be attractive alternative fuels due to rising oil prices and the depletion of fossil sources. It is produced by a process of transesterification of vegetable oils and animal fats with an alcohol in the presence of a catalyst. At present, biodiesel and bioethanol are considered solutions, and almost all EU countries have prepared a policy on the production and use of biodiesel in the transport and heating sectors. Biodiesel has certain advantages, such as a higher number of cetan, biodegradability, low sulfur content and aromatic content, and lower carbon monoxide emissions, unburned hydrocarbons and particulate matter. One of the main issues related to biodiesel and biodiesel blends is the high viscosity of the fuel. Among the biodiesel properties, density, viscosity and heating value affect engine performance and emission characteristics. The presented paper highlights the differences that occur in comparison to the classical fuels and the performances obtained when using biodiesel.
Waste-Energy (Heat) Recovery System from the Gases Compressed by an Oil-Free Screw Compressor
Authors: Vlăducă Iulian , Stanciuc Ramona , Bimbaşa Răzvan , Tomescu Sorin Gabriel
Published: August 2019

During compression, a gas heats up, almost in all cases this heat being wasted, either by cooling the gas because it is too hot for the application, or by storing the gas and letting the compressed gas cool naturally in the storage tank. This paper presents a waste-energy (heat) recovery system from the gases compressed by an oil-free screw compressor. The gases compressed by this compressor have a very high temperature compared to an oil injected screw compressor, due to the fact that the oil used to lubricate the rotors also acts as a heat sink, the oil free variant which is used when you want a very high purity of the gas, has higher tolerances and more friction between the rotors which result in a higher gas temperature. The recovery system uses a heat exchanger to extract the waste energy from the gas and at the same time it will cool it for immediate use. Depending on the requirements, the energy recovered may be used immediately to produce useful work or stored for a later use. It may be used for heating a building, to produce steam for a turbine driving electrical generator, or in other forms.
Determination of coefficient of performance of mechanical vapour recompression heat pump
Authors: Valchev Slav , Nenov Nenko , Georgiev Vasil
Published: August 2019

Mechanical vapour recompression heat pump systems are widely used in the industry -in evaporator and distillation installations, in seawater desalination and industrial wastewater treatment plants. The estimation of the energy efficiency level of this type of system is based on values of two basic parameters: specific energy consumption for production of 1 kg clean water (condensate) and actual coefficient of performance of heat pump system. The object of study is experimental determination of value of actual coefficient of performance of mechanical vapour recompression heat pump system for wastewater treatment. A mathematical regression equation between the actual coefficient of performance μ and two significant factors – temperature of secondary water vapour tsv and compression ratio of water vapour in mechanical compressor of heat pump system σ is received. The analysis show that actual coefficient of performance μ highly depends of value of compression ratio σ and less depends of values of temperature of secondary vapour tsv. It conclude that MVR heat pump system, in order to operate with high values of the actual coefficient of performance should be working to high values of temperature of secondary vapour and low values of compression ratio of water vapour in mechanical compressor.
Compressed Air Energy Storage Installation for Renewable Energy Generation
Authors: Borzea Claudia , Vlăducă Iulian , Ionescu Dan , Petrescu Valentin , Niculescu Filip , Nechifor Cristian , Vătăşelu Gabriel , Hanek Mihai
Published: August 2019

Compressed Air Energy Storage (CAES) installations are used for storing electrical power, under the form of potential energy from compressed air. The heat generated during compression can be stored to improve the efficiency of compression-expansion cycle. The solution presented consists of a 100 kW screw compressor driven by a 110 kW asynchronous three-phase motor. The compressor supplies air into vessels which store it until a high electrical energy demand arises. At that time, the compressed air is released into a 132 kW screw expander whose shaft spins a 132 kW asynchronous generator, producing electric power and supplying it into the electrical grid. Before expansion, the air must be preheated in order to avoid the freezing of expansion equipment. If the heat generated during compression is used for air preheating before expansion, the process is adiabatic. A demonstrative model of the installation is currently being developed, with the expander part being completed so far. The maximum power to be produced was calculated to be around 100 kW. During expander commissioning tests with air supply from a 250 kW high pressure compressor, a maximum generated power of 49.7 kW was attained, expected to be higher when releasing air from the reservoirs.
Noise assessment of the small-scale wind farm
Authors: Alionte Cristian-Gabriel , Comeaga Daniel-Constantin
Published: August 2019

The importance of renewable energy and especially of eolian systems is growing. For this reason, we propose the investigation of an important pollutant - the noise, which has become so important that European Commission and European Parliament introduced Directive 2002/49/CE relating to the assessment and management of environmental noise. So far, priority has been given to very large-scale systems connected to national energy systems, wind farms whose highly variable output power could be regulated by large power systems. Nowadays, with the development of small storage capacities, it is feasible to install small power wind turbines in cities of up to 10,000 inhabitants too. As a case study, we propose a simulation for a rural locality where individual wind units could be used. This specific case study is interesting because it provides a new perspective of the impact of noise on the quality of life when the use of this type of system is implemented on a large scale. This option, of distributed and small power wind turbine, can be implemented in the future as an alternative or an adding to the common systems.
Rain Use Efficiency in Southern Romania after Using the Device for Soil Modelling in Interrupted Furrows for Weeding Crops -DMBC-5
Authors: Oprescu Remus Marius , Voicea Iulian Florin , Dumitru Iulian , Dragan Ioana , Biolan Costel , Ungureanu PNicoleta , Neagu Emil Adrian , Norbert Bara , Jaloba Daniel , Arsenoaia Vlad Nicolae
Published: August 2019

The global impact of climate change, with the potential to affect agriculture through changes in temperature, rainwater distribution and amount, leads to the need to develop integrated technologies that increase rain use efficiency and support soil and environmental quality, ensuring higher agricultural outputs with lower costs. Soil modeling in interrupted furrows is a very efficient rainwater harvesting system, but has not yet been scientifically assessed for the conditions in Southern Romania as the other soil working systems have been. For this purpose, a soil modeling device consisting of a frame with triangle for coupling to the tractor, wheels for adjusting and limiting the working depth, soil loosening knives, ridge ploughs and furrow compartmenting equipment was compared with the conventional technology for sunflower culture in two localities in Southern Romania: Crânguri in Giurgiu County and Mărculeşti in Calarasi County. The device for soil modeling in interrupted furrows for weeding crops provides a viable option that has positive effects on soil properties and ensures increased crop yields compared to conventional works as well as the opportunity to increase the efficiency of water recovery in agriculture by harvesting rainwater.
Researches on ecological weed control in vegetable crops
Authors: Muscalu Adriana , Sorică Cristian , Persu Cătălin , Andrei Ana-Maria , Dorogan Angela , Tudora Cătălina
Published: August 2019

In recent years, intense concerns about the increasing resistance of weed populations to herbicide treatments, the low availability of bioactive ingredients for vegetable crops, as well as the expansion of organic farms for these niche crops have stimulated the development of new non-chemical methods of control or new approaches to those already used. In general, vegetable crops exhibit increased sensitivity to weeds compared to other crops. Therefore, weed control in organic vegetable crops is a real challenge for farmers, mainly using the so-called physical combat methods. Therefore, weed destruction is accomplished by using manual, mechanical, thermal or mulching means. The paper presents the preliminary experimental results obtained under laboratory conditions, referring to an innovative model of equipment for the ecological weed control in vegetable crops. It will achieve the destruction of weeds, combining the thermal method based on using hot water with the mechanical one, by equipping the machine withenvironmentally friendlyactive parts. The results obtained constitute an important premise for developing efficient equipment for the ecological weed control that can be used within integrated control systems, specific for organic onion, bean and bell pepper crops.
Researches on drying the clover through aeration to obtain hay
Authors: Zaica Ana , Nedelcu Ancuţa , Ciupercă Radu , Zaica Alexandru , Vişan Alexandra-Liana
Published: August 2019

Harvesting, preparation and conservation of hay is a frequent method for harvesting fodder from grasslands and forage crops, especially from the hill and mountain areas. The greatest losses of nutrients are obtained by traditional drying on the stubble of the hay. These losses are in the case of unfavourable weather even at 50 ... 60%, the drying time increasing to over 6 ... 8 days. This paper presents the results of the experimental researches achieved within a new technology for shortening the time from harvesting the clover to obtaining the hay at storage humidity. A pilot ventilation installation with a monitoring and control system for working processes was used to carry out the research. During the experiments, the parameters of the aeration agent were measured: temperature and humidity, as well as clover mass characteristics: humidity, temperature, drying uniformity.
Researches on the accumulation and transfer of heavy metals in the soil in tomatoes -Solanum lycopersicum
Authors: Niţu Mihaela , Pruteanu Augustina , Bordean Despina Maria , Popescu Carmen , Deak Gyorghy , Boboc Mădălina , Mustăţea Gabriel
Published: August 2019

Heavy metals in contaminated soils have benefited from a considerable attention due to the possible risks for the human body.

The current study has investigated the accumulation and transfer coefficient for three heavy metals (Cu, Pb, Zn) found in the contaminated soil with three concentrations (c1=1.5%, c2=3.0%, c3=4.5%, c4=6.0%), obtained by mixing the three metals, in the tomato fruit. The highest accumulation in the tomato fruits was recorded for zinc, then copper and the smallest for lead, for all four concentrations used. The transfer coefficient decreases as the concentration of heavy metals increases, so that for high heavy metals concentrations, the values of the transfer coefficient are very low, and for small heavy metals concentrations in the soil, the values for the transfer coefficient are higher.

The assessment of accumulation and transfer of heavy metals in the fruits of tomatoes grown in the contaminated soil has concluded that all concentrations of the copper, lead and zinc mix have shown a low risk for human consumption.
Structural and kinematic analysis of a shutter from monocoque trailer
Authors: Popa Lucreţia , Moise Ştefan-Iulian , Moise Victor , Ştefan Vasilica , Tabără Iulian
Published: August 2019

The bodies of trucks or trailers are provided with automatic folding shutters to ease the discharge of the transported materials. Typically, these shutters are powered by mechanisms that have active motor groups such as RRTaR or RR-RR-RTaR (i.e. motor dice or triads) and passive motor groups such as RRR, RR-RR-RR etc. If the technological forces are high and the relative speeds between the elements forming the steering coupler are small, the motor groups are formed by rigid bars and hydraulic cylinders. If relatively high gear ratios are required, then pneumatic cylinders may be used. If required relatively high speeds in the driving couplings, then you can use pneumatic cylinders. This paper presents structural and kinematic analysis of a shutter from a trailer used to transport bulk agricultural products, discharge towards the back. For the kinematic analysis of the folding shutter mechanism, computational procedures written in the Matlab syntax are used. The results of the calculations are presented in tabular and diagrams. After the cinematic analysis of the mechanism, it is possible to perform its cinetostatic analysis, i.e. the determination of the reactions from the kinematic couplers, as well as the hydraulic force in the hydraulic cylinder. Results can be used for the dimensional verification of the chosen elements.
Researches on the higher valuation of sugar beet pulp from sugar production to obtain premixes for animal feed
Authors: Nagy Elena Mihaela , Coţa Constantin , Cioica Nicolae , Gyorgy Zoltan , Deac Teodora
Published: August 2019

The sugar beet pulp from the sugar production is, thanks to the easily assimilable carbohydrate content, an important source of feed, especially for polygastric animals. Its efficiency in terms of assimilation and biological effect can be substantially improved by the addition of macroelements (Ca, Mg, P) and microelements (Zn, Co, Fe, Mn, Cu). These elements react with the sugar beet pulp compounds to form specific chelates. In order to preserve and maintain the nutritional value of the premix, the realization process involves a drying operation. In view of this, experiments have been carried out to determine the maximum moisture content that ensures preservation and optimum drying conditions. This paper presents how the percentage of micro-and macro-elements used and the drying temperature influence the drying speed of the premix
Scapular Dyskinesia, the forgotten culprit of shoulder pain and how to rehabilitate
Authors: Panagiotopoulos Andreas Christos , Crowther Ian Martyn
Published: August 2019

The improper movement of the scapula during shoulder movement is termed scapular dyskinesis and is an often-forgotten cause of pain and dysfunction. The scapula is a key part of the upper limb kinematic chain and is a vital component of the glenohumeral rhythm; which is a major determinant of the efficiency and efficacy of the upper limb. We provide an overview of the complex regional anatomy of the shoulder girdle and how this allows the scapula to act as a both a dynamic and static stabilizer to the upper limb. We explore the normal biomechanics and the aetiology, epidemiology and pathological occurrences which can disrupt the normal function and lead to scapula dyskinesis. Scapula dyskinesis is a poorly understood condition and provides a challenge for the clinician in both diagnosis and management. We provide a summary of the clinical assessment which is most likely to identify the source of the pathology and guides the treatment which is largely rehabilitation of the musculature with focused and specialized physiotherapy.
Impact anthropique sur la qualité métallique de l’eau du bassin versant de la Menoua et risque sanitaire
Authors: Santsa Nguefack C.V. , Ndjouenkeu R. , Ngassoum M.B.
Published: August 2019

L’eau du bassin versant de la Menoua subit de plein fouet le phénomène de pollution induite par les activités anthropiques très nombreuses dans la région. L’objectif de ce travail est d’étudier l’évolution spatio-temporelle de la qualité métallique de l’eau de consommation humaine du bassin versant de la Menoua, dans le but d’évaluer son degré de pollution due aux activités anthropiques. Cela afin d’estimer le niveau de risque sanitaire que court la population exposée à sa consommation. L’analyse physico-chimique (pH, température, conductivité électrique, turbidité et oxygène dissous) et métallique (Pb, Ni, Fe, Zn et Cu) a été faite sur 132 échantillons prélevés dans 33 sites répartis durant deux saisons, dont deux campagnes en saison sèche et deux autres en saison pluvieuse. Il en ressort que les eaux ont un pH acide compris entre 5,70 et 6,02, une faible minéralisation, une conductivité comprise entre 107,85 et 146,74 μS/cm et une forte turbidité comprise entre 0,58 et 0,68 NFU. Les résultats d’analyse en métaux mettent en évidence une forte contamination en fer, compris entre 0,79 et 0,89 mg/L, avec une toxicité forte, le quotient de danger étant supérieur à 1. Les autres métaux, Pb, Zn, Cu, Ni présents dans les ressources sont révélateurs d’une pollution anthropique, mais ne constituent pas un risque pour la boisson.
Micropolluants dans les eaux usées : qu’apporte un traitement avancé par adsorption sur charbon actif après un traitement conventionnel ?
Authors: Guillossou R. , Le Roux J. , Mailler R. , Vulliet E. , Morlay C. , Nauleau F. , Gasperi J. , Rocher V.
Published: August 2019

Plusieurs traitements avancés tels que l’adsorption sur charbon actif ou l’ozonation sont proposés pour le traitement des micropolluants (MP) au sein des stations de traitement des eaux usées (STEU). Cependant, peu d’informations existent sur les performances des STEU équipées de tels procédés et les bénéfices apportés au regard de l’élimination de multiples familles de MP. Dans cette étude, cinq campagnes d’échantillonnage ont été réalisées pour déterminer l’abattement de 48 MP (principalement des pesticides et des résidus pharmaceutiques) sur une STEU équipée d’un traitement avancé par adsorption sur charbon actif en micrograin en lit fluidisé avec un taux de traitement de 10 g/m3. Le traitement primaire n’a pas affecté la majorité des MP (abattement < 20 %), tandis que le traitement biologique a éliminé les molécules sorbées sur les boues ou biodégradées (> 60 %). Sans traitement avancé, la STEU étudiée ne permet pas de respecter la législation suisse sur les Mp, avec des abattements nettement inférieurs aux 80 % demandés (< 50 %) pour cinq substances indicatrices. Si l’élimination propre au traitement avancé n’a pas été significative (< 10 %) pour les MP déjà bien traités sur la STEU, l’adsorption sur charbon actif permet de diminuer de manière significative leur concentration (ex. : diminution d’un facteur 100 pour l’ibuprofène) et ainsi de limiter l’impact de la STEU sur le milieu récepteur. L’élimination propre au traitement avancé a été importante (30 à 60 %) pour les composés récalcitrants aux traitements conventionnels et permet d’atteindre des abattements globaux supérieurs à 60 % pour la majorité des MP. Une dose de charbon actif plus élevée serait nécessaire pour obtenir des abattements plus importants, notamment pour les MP utilisés en Suisse comme substances indicatrices. Cette étude a aussi permis de fournir les premières données sur le comportement de plusieurs molécules (acétamipride, estrone, glyphosate, imidaclopride, lorazépam et ofloxacine) le long d’une STEU équipée d’un traitement avancé.
Aktuelle Kontroversen in der Perinatalen Medizin
Authors: Singer Dominique
Published: August 2019

Liebe Leserinnen und Leser,

die vorliegende Ausgabe der Zeitschrift für Geburtshilfe und Neonatologie (ZGN) begrüßt Sie nach der Sommerpause mit gleich 2 aktuellen Kontroversen, die die Perinatale Medizin – teils mehr auf geburtshilflicher, teils mehr auf neonatologischer Seite – bewegen. Doch der Reihe nach!
Suspected Pulmonary Embolism after Oxygen-Ozone Therapy for Low Back Pain
Authors: Chirchiglia Domenico , Chirchiglia Pasquale , Stroscio Carmelino , Volpentesta Giorgio , Lavano Angelo
Published: August 2019

Oxygen-ozone therapy is used to treat degenerative pathology of the spine when surgery is not needed (e.g., removal of a herniated disk). Some authors have described it as a safe and effective procedure in ∼ 70 to 90% of patients. The aim of the therapy is to dehydrate the intervertebral disk and alter its contents. However, this treatment has been associated with some rare but very serious side effects. Both cardiac damage and a case of fulminant septicemia were reported. We describe a case of suspected pulmonary embolism, followed by sudden death, in an elderly woman treated with oxygen-ozone therapy for lumbar pain caused by disk protrusion. We believe a massive pulmonary embolism occurred, probably caused by an intradiskal injection that accidentally punctured a venous vessel and created emboli.
Microvesicles and Cancer Associated Thrombosis
Authors: Lacroix Romaric , Vallier Loris , Bonifay Amandine , Simoncini Stephanie , Mege Diane , Aubert Mathilde , Panicot-Dubois Laurence , Dubois Christophe , Dignat-George Françoise
Published: August 2019

Microvesicles (MVs) are small membrane enclosed structures released into the extracellular space by virtually all cell types. Their composition varies according to the cell origin and the stimulus which caused their formation. They harbor functional molecules and participate in intercellular communication. Endothelium, inflammatory cells, and cancer cells produce procoagulant MVs which contribute to cancer-associated thrombosis (CAT) in animal models. The tissue factor (TF) conveyed by these MVs was shown to play a key role in different animal models of experimental CAT. Alternatively, other molecular mechanisms involving polyphosphates or phosphatidylethanolamine could also be involved. In clinical practice, an association between an increase in the number of TF-positive or the procoagulant activity of these MVs and the occurrence of CAT has indeed been demonstrated in pancreatic-biliary cancers, suggesting that they could behave as a biomarker predictive for CAT. However, to date, this association was not confirmed in other types of cancer. Potential causes explaining this limited associated between MVs and CAT are (1) the diversity of mechanisms associating MVs and different types of cancer; (2) a more complex role of MVs in hemostasis integrating their anticoagulant and fibrinolytic activity; and (3) the lack of sensitivity, reproducibility, and standardization of current methodologies permitting measurement of MVs. Each of these hypotheses constitutes an interesting exploration path for a future reassessment of the clinical interest of the MVs in CAT.
Spontaneous Human Myometrial Contractility in the Third Trimester of Pregnancy in Relation to Past Mode of Delivery
Authors: Ryan Gillian A. , Nicholson Sarah M. , Crankshaw Denis J. , Morrison John J.
Published: August 2019

Objective It is well established that women with a previous vaginal delivery have higher success rates in relation to vaginal birth after cesarean than those without. The aim of this study was to examine the effect of past mode of delivery on contractile parameters of human myometrium in vitro.

Study Design Myometrial strips were excised from 64 women at cesarean delivery (CD) and recordings of spontaneous contractile activity analyzed and compared across three clinical groups: (1) women with no previous delivery (Group 1); (2) women with CD only (Group 2); and (3) women with a history of vaginal delivery and CD (Group 3).

Results Myometrial samples from women in Group 3, women who had a previous vaginal delivery, had a significantly greater maximum amplitude of contractions (p < 0.05), a greater force (mean contractile force) of contractions (p < 0.01), and a faster rate of rise (p < 0.01) and relaxation of contractions (p < 0.05) than those in Groups 1 and 2.

Conclusion Many of the functional parameters of human uterine contractions are altered, or enhanced, in the women who have had a previous vaginal delivery, when compared with those without. This may partly explain the clinical differences observed in labor.
Short-Term Outcomes following Standardized Admission of Late Preterm Infants to Family-Centered Care
Authors: Reiss Jonathan , Upadhyayula Pavan S. , You Hyeri , Xu Ronghui , Stellwagen Lisa M.
Published: August 2019

Objective The study compares the short-term outcomes of late preterm infants (LPI) at an academic center in San Diego, California after a change in protocol that eliminated a previously mandatory 12-hour neonatal intensive care unit (NICU) observation period after birth.

Study Design This is a retrospective observational study examining all LPI born with gestational age 35 to 366/7 weeks between October 1, 2016 and October 31, 2017. A total of 189 infants were included in the review. Short-term outcomes were analyzed before and after the protocol change.

Results Transfers to the NICU from family-centered care (FCC) were considerably higher (23.2%) following the protocol change, compared to before (8.2%). More infants were transferred to the NICU for failed car seat tests postprotocol compared to preprotocol. Length of stay before the protocol change was 5.13 days compared to 4.80 days after.

Conclusion LPI are vulnerable to morbidities after delivery and through discharge. We found an increase in failed car seat tests in LPI cared for in FCC after elimination of a mandatory NICU observation after birth. The transitions of care from delivery to discharge are key checkpoints in minimizing complications.
The Effect of Maternal Obesity on Oxytocin Requirements to Achieve Vaginal Delivery
Authors: Adams April D. , Coviello Elizabeth M. , Drassinower Daphnie
Published: August 2019

Objective Our objective was to determine if obese women are more likely to require oxytocin rates > 20 mU/min to achieve vaginal delivery, compared with normal weight women.

Study Design This is a retrospective cohort study of deliveries at the MedStar Washington Hospital Center and MedStar Georgetown University Hospital.

Results There were 4,284 births included in the analysis. Thirty-three per cent of deliveries were among women classified as overweight (body mass index [BMI] 25–29.9 kg/m2) and 58% were among women classified as obese (BMI >30.0 kg/m2), 12% were classified as class III obesity (BMI >40 kg/m2). Overall 110 (2.6%) women required an oxytocin rate of >20 mU/min. Doses of oxytocin >20 mU/min for women in the overweight, class I obesity, and class II obesity groups were 2.6, 1.9, and 1.6%, respectively. Deliveries among women with class III obesity had a significantly longer duration of oxytocin exposure (10.7 hours) compared with the normal weight group (8.2 hours, p < 0.001), and had a higher maximum rate of oxytocin compared (10 mU/min) to normal weight women (8 mU/min, p < 0.001).

Conclusion Obese women are more likely to require oxytocin rates more than 20 mU/min, higher doses of oxytocin, and greater duration of oxytocin exposure to achieve a vaginal delivery.
Dense coding and quantum teleportation using type II1 von Neumann algebras
Authors: Huang Siendong
Published: August 2019

Quantum states with perfect correlation of continuous variable systems are investigated. On the basis of the property of perfect correlation, the local observable algebras are assumed to be type II1 factor von Neumann algebras. Consequently, finite dimensional matrices may be represented using elements of local observable algebras. Therefore, the dense coding and teleportation processes are identical in performance to those in the finite dimensional cases.