bluuebunny/crossref_metadata_2025_split huggingface dataset:
The influence of Arctic Fe and Atlantic fixed N on summertime primary production in Fram Strait, North Greenland Sea
Authors: Krisch Stephan , Browning Thomas J. , Graeve Martin , Ludwichowski Kai-Uwe , Lodeiro Pablo , Hopwood Mark J. , Roig Stéphane , Yong Jaw-Chuen , Kanzow Torsten , Achterberg Eric P. 
Published: September 2020

AbstractClimate change has led to a ~ 40% reduction in summer Arctic sea-ice cover extent since the 1970s. Resultant increases in light availability may enhance phytoplankton production. Direct evidence for factors currently constraining summertime phytoplankton growth in the Arctic region is however lacking. GEOTRACES cruise GN05 conducted a Fram Strait transect from Svalbard to the NE Greenland Shelf in summer 2016, sampling for bioessential trace metals (Fe, Co, Zn, Mn) and macronutrients (N, Si, P) at ~ 79°N. Five bioassay experiments were conducted to establish phytoplankton responses to additions of Fe, N, Fe + N and volcanic dust. Ambient nutrient concentrations suggested N and Fe were deficient in surface seawater relative to typical phytoplankton requirements. A west-to-east trend in the relative deficiency of N and Fe was apparent, with N becoming more deficient towards Greenland and Fe more deficient towards Svalbard. This aligned with phytoplankton responses in bioassay experiments, which showed greatest chlorophyll-a increases in + N treatment near Greenland and + N + Fe near Svalbard. Collectively these results suggest primary N limitation of phytoplankton growth throughout the study region, with conditions potentially approaching secondary Fe limitation in the eastern Fram Strait. We suggest that the supply of Atlantic-derived N and Arctic-derived Fe exerts a strong control on summertime nutrient stoichiometry and resultant limitation patterns across the Fram Strait region.
Parvimonas micra as a putative non-invasive faecal biomarker for colorectal cancer
Authors: Löwenmark Thyra , Löfgren-Burström Anna , Zingmark Carl , Eklöf Vincy , Dahlberg Michael , Wai Sun Nyunt , Larsson Pär , Ljuslinder Ingrid , Edin Sofia , Palmqvist Richard 
Published: September 2020

AbstractThe use of faecal microbial markers as non-invasive biomarkers for colorectal cancer (CRC) has been suggested, but not fully elucidated. Here, we have evaluated the importance of Parvimonas micra as a potential non-invasive faecal biomarker in CRC and its relation to other microbial biomarkers. The levels of P. micra, F. nucleatum and clbA + bacteria were quantified using qPCR in faecal samples from a population-based cohort of patients undergoing colonoscopy due to symptoms from the large bowel. The study included 38 CRC patients, 128 patients with dysplasia and 63 controls. The results were validated in a second consecutive CRC cohort including faecal samples from 238 CRC patients and 94 controls. We found significantly higher levels of P. micra in faecal samples from CRC patients compared to controls. A test for P. micra could detect CRC with a specificity of 87.3% and a sensitivity of 60.5%. In addition, we found that combining P. micra with other microbial markers, could further enhance test sensitivity. Our findings support the potential use of P. micra as a non-invasive biomarker for CRC. Together with other microbial faecal markers, P. micra may identify patients with “high risk” microbial patterns, indicating increased risk and incidence of cancer.
Evaluation of reproductive performances of the common octopus (Octopus vulgaris) reared in water recirculation systems and fed different diets
Authors: Casalini Antonio , Roncarati Alessandra , Emmanuele Pietro , Guercilena Niccolò , Bonaldo Alessio , Parma Luca , Mordenti Oliviero 
Published: September 2020

AbstractThe reproductive performance of Octopus vulgaris broodstocks fed two different diets (mixed fish [F group, BW 1,048.14 g] or mixed crustaceans [C group, BW 998.44 g]) was analyzed using an experimental recirculating aquaculture system consisting of a tank equipped with spawning and incubation chambers. A total of 8 females (F1–4; C1–4), and 8 males (M1–M8) were selected. DI of the C group females was significantly (p < 0.05) higher (3.0 ± 0.29%) than the F group (2.16 ± 0.67%). SGR in C group was significantly higher (1.43 ± 0.12%) than the F group (1.18 ± 0.25%). Egg clusters, number of clusters, number of clusters/kg BW, and total length were more favorable in the C group than the F group. The number of clusters/kg BW of C females was 2.5 times higher than that of F females (78.1 ± 6.5 vs 31.1 ± 13.3). The total eggs number, number of eggs/cm, number of eggs/kg BW in the C group were significantly (p < 0.05) higher compared with the F group; the number of eggs/kg BW and paralarvae/kg BW were 5 times higher in the C group (115,928 ± 12,513 C vs 22,109 ± 7912 F and 114,953 ± 12,591 vs 20,729 ± 7104, respectively). Hatching rate of the C group was significantly (p < 0.05) higher compared to the F group.
Sex-related impacts on clinical outcomes after percutaneous coronary intervention
Authors: Park Hyun Woo , Han Seungbong , Park Gyung-Min , Ann Soe Hee , Suh Jon , Kim Yong-Giun , Lee Seung-Whan , Kim Young-Hak 
Published: September 2020

AbstractThe aim of this study is to investigate sex-related impacts on clinical outcomes after percutaneous coronary intervention (PCI). We analyzed 90,305 patients (29.0% of women) with the first episode of coronary artery disease who underwent PCI from the Korean National Health Insurance claims database between July 2013 and June 2017. Women were significantly older than men (71.5 ± 10.5 vs. 61.8 ± 11.7 years, p < 0.001). The study population had a median follow-up of 2.2 years (interquartile range, 1.2–3.3). In the propensity-score matched angina population (15,104 pairs), the in-hospital mortality of women was not different from men (odds ratio, 0.87; 95% confidence interval: 0.71–1.08, p = 0.202). However, the post-discharge mortality of women was significantly lower (hazard ratio, 0.74; 95% confidence interval: 0.69–0.80, p < 0.001) than that of men. In the propensity-score matched acute myocardial infarction (AMI) population (8,775 pairs), the in-hospital mortality of women was significantly higher than that of men (odds ratio, 1.19; 95% confidence interval: 1.05–1.34, p = 0.006). Meanwhile, there was no difference in mortality after discharge (hazard ratio, 0.98; 95% confidence interval: 0.91–1.06, p = 0.605). The post-discharge mortality of women was not higher than men under the contemporary PCI treatment. Altered sex-related impacts on clinical outcomes might be attributed to improved medical and procedural strategies.
20 GHz self‐oscillating parametric optical frequency comb generator using an electroabsorption modulated laser based dual‐loop optoelectronic oscillator
Authors: Cheng Yumin , Yan Juanjuan 
Published: September 2020

In this work, a self‐oscillating parametric optical frequency comb generator is proposed and experimentally demonstrated. It consists of an electroabsorption modulated laser (EML) based dual‐loop optoelectronic oscillation loop and a parametric frequency mixer. In the experiments, a 20 GHz radio‐frequency signal is produced to drive the EML. The output pulses from the EML are amplified to work as pump seeds for the frequency mixer. In the mixer, a length of high non‐linear fibre (HNLF) is firstly used to introduce chirps to the pump pulses, a section of single mode fibre is then employed for pulse compression, and finally another HNLF is applied for parametric frequency mixing. When the pump power is 28 dBm, a nine‐line comb with a frequency spacing of 20 GHz and an optical signal‐to‐noise ratio >15 dB is generated. More comb lines can be obtained when another frequency mixer is cascaded.
Impact of COVID-19 on Cardio-obstetric Risk Indicators: Future Directions
Authors: Goyal Prerna , Chhabra Shibba Takkar 
Published: September 2020

AbstractCardiovascular illness is one the foremost causes of death in females. The goal of preventive medicine is to identify and target high-risk females belonging to the younger age group in order to prevent future onset of cardiovascular pathologies. Certain obstetric complications like idiopathic preterm birth, preeclampsia (PE), gestational diabetes and abruptio placentae mark their presence in the checklist of risk indicators for cardiovascular diseases (CVD) among the female population. Previous severe acute respiratory syndrome-1 (SARS-1) infections recorded a significant impact on maternal and fetal outcomes. In this article, we aim to focus on the incidence of cardiovascular risk indicators with the incessant novel Coronavirus disease-19 (COVID-19) pandemic in pregnant women and to provide recommendations for venous thromboembolism (VTE) prophylaxis in infected females. As the disease is novel and gradually unfolding to clinicians globally, the data and the publications are also evolving. Studies on COVID-19 in pregnancy has shown an increase in the number of preterm births, and PE with some reports on vertical transmission, but no significant increase in miscarriage, still births and teratogenicity. Preterm births appear more likely to be iatrogenic rather than idiopathic, owing to severity of infection or maternal/fetal safety. Causal association of virus with PE needs further analysis by large population studies, as both have common overlapping clinical and laboratory parameters. Direct placental involvement by virus leading on to PE or infection itself simulating PE needs further explication. Assessment of placental function, histopathological examination, and measurement of antiangiogenic factors are some of the suggested measures to differentiate further. Peripartum cardiomyopathy in COVID-19 positive pregnant females has not yet been actively explored, particularly in cases of clinical deterioration. Practical utilization of handheld point-of-care echocardiography machines stand in need for diagnosing myocardial dysfunction in this pandemic. COVID-19 infection and pregnancy together may impart a greater thromboembolism risk due to their inherent hypercoagulable states. All pregnant females with COVID-19 infection are candidates for VTE prophylaxis, both antepartum and postpartum depending on the severity of illness.
Recommendations for Gynecological Endoscopic Surgery during COVID-19 Pandemic
Authors: Kakollu Amrutha , Hari Anupama 
Published: September 2020

AbstractThe presence of coronavirus disease 2019 (COVID-19) continues to overwhelm health-care systems with numerous concerns around the safety of patients as well as health-care professionals. It is essential to allow for judicious use of resources and emphasize allotting maximum staff and resources to care for the affected. To this end, most centers are choosing to defer elective procedures and perform only emergency surgeries. The safety of all theater staff is of utmost importance, and the risks of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) viral transmission should be curbed when operating. In particular, there are concerns relating to the transmission of COVID-19 during gynecological laparoscopic surgery, arising from the possible generation of contaminated aerosols from gas leakage and the creation of smoke from the use of electrosurgical devices. The aim of this paper is to review the evidence available as of today for recommendations to follow while performing gynecological procedures.
Review of Recommendations for Gynecology Practice during COVID-19 Pandemic
Authors: Kakollu Amrutha , Hari Anupama 
Published: September 2020

AbstractThe impact of COVID-19 on healthcare is enormous. It is essential that we prioritize treating patients and reserving our resources for better care of patients affected with COVID-19. The well-being of the healthcare professionals is of utmost importance as well. Treating gynecological patients during this time is challenging as individualizing treatment without compromising safety and minimizing risk is of utmost importance. In this article, we have aimed to write a consensus to guide the treatment of gynecological patient, based on the limited evidence available as of today.
Comparisons of national standards in the field of gas flow rate and volume, gas flow rates from 20 to 6500 m3/h
Authors: Mingaleev A V , Yakovlev A B , Mickan B , Bardonov A I , Serediuk D , Stankevicius A , Busuladz̆ić I 
Published: September 2020

The supplementary international comparison of national gas flow standards COOMET.M.FF-S9 was carried out from May 2019 to January 2020. The comparison were made in the range of gas flow from 20 to 6500 m3/h. Six European National Metrological Institutes (VNIIM-VNIIR, PTB, IFSM, BelGIM, LEI and LABSAGAS) took part in the comparison. The VNIIM-VNIIR acted as a pilot laboratory. The participants used for comparison the reference test rigs, implemented mainly on the basis of reference critical nozzles or reference flow meters. The transportable comparison standards (rotary and turbine flow meters) were used for the comparison procedure and in sequence were sent to the participants for testing. According to the results of the comparison, all participants confirmed their calibration and measuring capabilities in the declared flow ranges.

Main text

To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/.
The final report has been peer-reviewed and approved for publication by the CCM, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).
Novel high efficiency deterministic polishing method using magnetorheological elastomer
Authors: Chen Yuchuan , Huang Wen , Zhang Yunfei , Li Kailong , Fan Wei , Zheng Yongcheng , Qi Song , Yu Miao 
Published: September 2020

Abstract
Magnetorheological elastomer (MRE) is a kind of intelligent material with excellent magnetic-induced rheological features. It has been widely applied in fields like vibration control, soft robots, smart sensing, electromagnetic shielding, etc. In theory, MREs have flexible and controllable rheological properties, which make it possible to become a high efficient deterministic polishing medium as that of magnetorheological fluids. In this paper, a novel polishing method using MRE material as the deterministic polishing tool is proposed. This method utilizes the magnetorheological effect of MRE to generate stronger instantaneous shear force which has advantages over that of traditional magnetorheological fluid finishing. First, a new MRE material suitable for magnetorheological principle finishing is prepared, and the mechanical properties of MRE are characterized. In order to make sure that the polishing fluid can run into the polishing zone and improve the polished surface quality, special pattern and micro structures are well designed and engineered on the MRE surface. Compression and wear property are investigated to understand the nature of this novel tool. Then, a mathematic model considering the contribution weights of shear stress and normal pressure of MRE polishing is established and discussed. Finally, polishing experiments are carried out on an optical glass, and a stable removal function is obtained. Results demonstrate that this novel MRE polishing can achieve high efficiency and determinability in optical manufacturing, which proves the feasibility of the novel polishing method using MRE tool.
Effects of C and La on the Tensile Property and Hot Working Characteristics of CoCrFeMnNi High-Entropy Alloy
Authors: Li Anmin , Huang Zhuofang , Xu Hao , Wei Shanjun 
Published: September 2020

Abstract
CoCrFeMnNi high-entropy alloy series were cast by magnetic suspension vacuum melting furnace. They were forged at 1160°C and annealed at different temperatures. Gleeble3800 thermal deformation simulation testing machine was used to conduct thermal compression simulation to research the hot workability of the alloy. The results show that the microstructures of these alloys are made up of solid solution with face-centered-cubic structure and white granular precipitate M23C6. The addition of C and La increases the elongation of CoCrFeMnNi high-entropy alloy forged without annealing by 1.32 times. Annealing deteriorates the tensile properties of these alloys. The constitutive equation and thermal processing diagram of the alloy are established according to the results of thermal simulation. The addition of C and La reduces the flow stress of CoCrFeMnNi high-entropy alloy, but significantly reduces the instability region of thermoplastic deformation. The optimized thermal process parameters are as following: ①CoCrFeMnNi, when the range of the deformation temperature and the strain rate are respectively 900~1040°C and 0.01~0.025s−1, the optimum deformation temperature is 1040~1100°C, and the strain rate is in the range of 0.013~0.033s−1; ②CoCrFeMnNiC0.007La0.0004, when the range of the deformation temperature and the strain rate are respectively 1000~1080°C and 0.31~1s−1, the optimum deformation temperature is 1080~1100°C, and the strain rate is 0.01~0.025s−1.
Novel Liquid Semiconductor Shield for Photovoltaic Modules: Application at Liquid State
Authors: M.E. Emetere , T.J. Abodunrin , C.O. Iroham 
Published: September 2020

Abstract
Inefficiency of the polymeric material of the photovoltaic (PV) module to shield the solar cell from UV radiation has made the maintenance cost of solar energy generation high. The results from the usage of colour plastic cellophanes as PV shield are not promising. In this study, a novel solid-state bio-filter (SSB) was synthesized using silver nitrate salt and hibiscus flower extract. The results show that the novel SSB material mitigates UV radiation via two processes i.e. reflection of UV radiation and processing of the remaining UV radiation into peaks. It was also observed that the SSB has three absorption levels and a bandgap of 3.194 eV. It is recommended that further study be carried-out to estimate the portion of UV radiation that has been reflected.
Extraction Process Optimization of Fucoidan from Dealginated Kelp Waste
Authors: Wang Le , Fan Jiahui , Guo Siya , Zhang Zongyi , Wang Yongchang , Guo Lei 
Published: September 2020

Abstract
In order to optimize the extraction process of fucoidan from dealginated kelp waste. On the basis of single-factor experiments, Box-Behnken design was evaluated to study different variables of pH, extraction temperature and extraction time on fucoidan yield. By solving the regression equations and analyzing 3-D plots, the optimum conditions were at pH4.9, liquid/material ratio of 20:1 mL/g, extraction temperature of 73°C, and extraction time of 4 h. Under these conditions, the fucoidan yield of dealginated Kelp waste was 1.63 ± 0.07%, which were in good agreement with the predicted values. It is the first report of fucoidan extraction from dealginated kelp waste and the results provides a basis for further purification and application of fucoidan.
Effect of Different Particle Sizes and Pore-Making Agent Ratio on Properties of SiC Porous Ceramics
Authors: Li Huan , Xu Chengshi , Chen Juntai , Ma Mengen , Deng Xiangyun 
Published: September 2020

Abstract
In this paper, SiC particles of different particle sizes were used as aggregates to prepare SiC porous ceramics (50-70 mesh, 70-80 mesh and 80-90 mesh), and their flexural strength, filtration pressure drop and porosity were tested. On this basis, SiC with 80-90 mesh size was used as the aggregate, and the properties of porous ceramics were measured by using different proportions of pore-making agent. The results showed that when SiC particles were 80-90 mesh and the ratio of pore-making agent was 2:1, the samples prepared at 1300°C for 1.5h had the best comprehensive performance, the porosity was 33.9%, the flexural strength was up to 38.28MPa, and the filtration pressure drop was relatively low.
Synthesis and Molecular Recognition Properties of a Coumarin Derivative
Authors: Wang Mengqi , Liu Zhilian , Zhang Qiang , Zhao Hao , Liu Hui , Liu Wei , Wang Xiaoyan , Yuan Mengting , Dai Xinran , Deng Ziwei , Chen Pingping , Gao Min , Wang Tengfei , Zhang Shuxiang 
Published: September 2020

Abstract
In this paper, a coumarin derivative La was designed and synthesized in two steps with simple synthesis method and high yield. Its recognition performance was studied by UV-Vis spectroscopy. It was found that when iron ion (III) was added, the absorption value of the probe molecule La was significantly enhanced, while other metal ions studied did not cause significant changes. Further research on the relationship between absorbance and iron ion (III) concentration revealed that they have a good linear relationship. This shows that the coumarin derivative La has the ability to detect iron ions (III) qualitatively and quantitatively.
Preparation and Identification of Carbon Materials from Coffee Grounds
Authors: Liu Genming , Sun Liquan , Zhang Pengke , Wu Yuzhu , Ma Chencan , Su XinYu 
Published: September 2020

Abstract
Carbon materials have been reported to applying extensively on many biological researches. In this paper, the organic carbon component in coffee grounds was extracted to convert the activated carbon, and the adsorption activity of the activated carbon was studied. It was noticed that the two steps of oil extraction and sieving gave a great influence for adsorption activity. Oil extraction in the treatment process made the surface of the coffee grounds form a loose and porous structure and thus the adsorption areas were expanded, which was the important influencing factor. Screening could control the particle diameter of the final product. It was found that the large particles of the unscreened sample formed activated carbon of coffee grounds with adsorption properties. It showed the stronger adsorption activity of the activated carbon than the original coffee grounds, which showed only weak adsorption. The final product obtained after oil extraction and sieving was about 70% higher than the adsorption capacity of commercial activated carbon.
Numerical Simulation of Gas-Assisted Extrusion of Four-Lumen Micro-Catheter based on FEM Method
Authors: Ren Zhong 
Published: September 2020

AbstractIn this work, the gas-assisted extrusion of four-lumen micro-catheter (FLMC) was numerically studied by computed fluid dynamics (CFD) software software Polyflow. The extrudate profiles and die swell ratios of FLMC for the gas-assisted extrusion are gotten, and compared with those of the traditional extrusion. Results show that the die swell of FLMC is eliminated by the gas-assisted extrusion. To analyze the effects of gas-assisted on the elimination of die swell, the flow velocities, pressure, shear stress, and the first normal stress difference distributions of melt were obtained for both extrusions. Results show that compared with the results of traditional extrusion, the radial velocities, pressure, shear stress and the first normal stress difference of FLMC for the gas-assisted extrusion are very little, and the axial flow velocity of melt is uniform, which can reduce the elastic energy storage and finally eliminate the die swell problem.
Using Deep Learning Models Combined with Crowd Emotion Models to Identify Abnormal Behaviors in Crowds
Authors: Li Xiao , Yang Yu , Li Linyang , Xu Yiming 
Published: September 2020

Abstract
Aiming at the problem that the definition of crowd abnormal behavior detection is ambiguous and difficult to combine with context semantics, an algorithm using OCC human emotion model combined with crowd entropy is proposed. First calculate the crowd entropy for the crowd, and determine whether the entropy value is abnormal, if it is abnormal, further extract the optical flow OF and HOG. Then project it into two-dimensional vector data, send it to CNN for local feature extraction and combine with OCC model to achieve the description of crowd emotions. Finally, predict whether the abnormality occurs according to the judgment factor. Verified on the data set, this method shows a high accuracy.