Miracle-dz/UniFAR-FTUs huggingface dataset:
Doped iron oxide scaffolds with gradient porosity fabricated by freeze casting: pore morphology prediction and processing parameters

Iron oxide scaffolds with gradient porosity were fabricated using the freeze-casting technique. Doped iron oxide particles were employed to generate stable particle suspensions in camphene using the ball-milling technique. Viscosity measurements were performed to determine the effect of the milling time and the additive incorporation. The freeze-casting process implemented in this work created a wide diversity of solidification front velocities, (2–80 µm s−1), and thermal gradients, (0.2–20°C cm−1) during sample fabrication. The solidification problem of liquid/solid systems has often been reviewed, but usually only under steady-state conditions. This study presents a much simpler approach for the correlation of the average dendrite arm spacing and pore morphology with different processing parameters. GRAPHICAL ABSTRACT
IS BITCOIN AN OPPORTUNITY OR A THREAT TO THE RELEVANCE OF ACCOUNTING INFORMATION?

Positive accounting research is the one that addresses the informational perspective of accounting (Watts & Zimmerman, 1990). In this scenario, studies on the relevance of accounting information in the capital market stands out. Some of these surveys consider the effects of firms’ extrinsic variables on the ability of accounting information to predict stock prices. Considering the apparent inverse relationship between Bitcoin and the capital markets, being this cryptocurrency able to be used as hedge for investors in these markets (Bouri et al., 2017), the purpose of this study was to analyze the influence of the Bitcoin price in the market value of the companies listed on the [B]³ in conjunction with the accounting information. Panel data regressions were performed considering the stock price and return as dependent variables and Net Income, Equity and Bitcoin quotation as regressors. From 356 observations concerning 89 different companies, it was possible to verify, with a 95% confidence level, that the companies’ market value is negatively influenced by Bitcoin’s price increase. This suggests a preference for investments in the cryptocurrency market over the capital market when the first one is on the rise, corroborating Bouri et al. (2017). In addition, Equity loses significance and Net Income is reduced when Bitcoin is included in the model, indicating a potential risk to accounting information in terms of relevance. The research has limitations regarding the use of a single cryptocurrency in the face of several existing ones and also in the selection of only one exercise as sample cut.Keywords: Blockchain; Bitcoin; Value Relevance; Stock Market.DOI: https://doi.org/10.21714/2446-9114RMC2020v21n1t04
Formulated Feeds Containing Fresh or Dried Artemia as Food Supplement for Larval Rearing of Black Tiger Shrimp, Penaeus monodon

Supplementation of microalgae and Artemia nauplii with practical formulated feeds containing fresh or dried Artemia biomass for larval rearing of black tiger shrimp, Penaeus monodon, was assessed. Five feeding treatments were carried out in a recirculating seawater system with fifteen 30-L fiberglass tanks. Shrimp nauplii were stocked at a density of 150 L−1 for 23 days. In the control treatment, live feed was supplemented with commercial formulated feed (Inve Aquaculture NV, Belgium). In two other treatments, live feed was supplemented with a pelleted feed based on either fresh or dried Artemia. In the remaining two treatments live feed was supplemented with a combination of 50% commercial feed and 50% fresh or dried Artemia feeds. Overall, performance of PL in the combination treatments (commercial feed and Artemia diets) were equal to or better than those fed commercial feed alone as seen by the better growth rate and higher resistance to formalin stress. The results indicate that feed containing fresh or dried Artemia biomass can partially supplement live feeds for larval rearing of P. monodon.
Absence of Coupling Factor Particles on Partition Membranes of Chloroplast Grana

In a previous paper Murakami (6) demonstrated that the photosynthetic coupling factor particles on the outer surface of the thylakoid membrane can be visualized on ultrathin sections by conventional staining method. Subsequently Oleszko and Moudrianakis (7) introduced a successful block-staining method of the coupling factor particles on the thylakoid membrane, and they concluded that the coupling factor particles are located on both the stromal thylakoid and granal partition. In contrast to their view, this paper presents evidence strongly favoring the conclusion that the coulping factor particles are not located on the granal partition, but only on the outer surface of the stromal and end-granal thylakoid membranes, being exposed directly to the stromal compartment. Spinach chloroplasts were prepared in 50 mM phosphate buffer, pH 7.6, containing 0.3 M sucrose and 100 mM NaCl. The chloroplasts were fixed for 1 hour with 2.5 %
Evaluating Completeness of Species Lists for Conservation and Macroecology: a Case Study of Mexican Land Birds

Abstract: Studies of species diversity, macroecology, and conservation are usually based on lists of species, but lists found in the scientific literature vary in completeness. The use of such data sets can produce misleading results, making it necessary to test species lists for completeness before undertaking an analysis. Species‐richness estimators are useful for judging the completeness of species lists but have limitations. To add rigor to studies based on species lists, we propose that species lists should test for “ omnipresent” taxa—species, genera, and families that occur throughout the region concerned—and for a minimum number of species and families. As a case study, we compared species assemblages in diverse habitats in Mexico and found that seven families and two genera of land birds are omnipresent in mainland Mexico (excluding treeless areas) and that the most depauperate assemblage known contains 35 species from 21 families. We concluded that a list of land birds from Mexico that lacks any of these omnipresent taxa or that contains fewer than 35 species or 21 families is incomplete. Similar analyses can be done for other taxa and other parts of the world. Tests for omnipresent taxa and for a minimum number of species and families can be used in combination with other existing criteria, such as species‐richness functions, to better evaluate the completeness of species lists. Realistic results may be produced in macroecological and conservation studies only if they are based on reasonably complete species lists.
Spatio‐temporal trends in diversity of demersal fish species in the Benguela current large marine ecosystem region

Biodiversity is changing at an unprecedented rate on a global scale as a complex response to several anthropogenic changes, in addition to the background natural environmental variability and cycles. In the Benguela Current Large Marine Ecosystem region (BCLME), aspects of demersal fish species diversity were studied between 1985 and 2010 in three countries (Angola, Namibia, and South Africa) using scientific survey data (depending on country). The study was aimed to address multi-tiered objectives: to document patterns of diversity (as measured by the different indices of diversity) in the three countries; to relate these patterns to various explanatory variables (depth, latitude, longitude, bottom temperature, and total catch) using a generalized additive model; and to compare the patterns of diversity and importance of potential drivers of biodiversity across the BCLME region. Results showed contrasting diversity patterns between the three countries in terms of both the form and strength of the relationship with different sets of predictors. Species richness S, Pielou's evenness index J', and Shannon–Wiener index H' were shown to increase with increasing depth in all three countries. In addition, both the overall and depth-dependent latitudinal pattern in S showed local and regional level bottlenecks in biodiversity, and the latitudinal pattern of S was similar to the pattern of bottom temperature. Overall, the species richness of demersal fish species (S) was found to increase as one moved towards the equator, in line with similar studies that reported an increase in richness with latitude.
OIL PRICE AND EARNINGS MANAGEMENT: EVIDENCE FROM CRUDE OIL AND GAS COMPANIES IN INDONESIAN STOCK EXCHANGE

This research is aimed to examine the effect of oil price on earnings management in Indonesia. Research sample consist of 9 crude oil and gas companies listed in Indonesian Stock Exchange for the 2013-2018 period. Earnings management is measured by discretionary accruals. Analysis data uses regression analysis. Result shows that oil price has negative effect on upward earnings management. Since oil price determines companies’ profitability, lower oil price will leads companies to engage in earnings management to achieve higher earnings.
Computational Identification of Lysine Glutarylation Sites Using Positive-Unlabeled Learning

Background As a new type of protein acylation modification, lysine glutarylation has been found to play a crucial role in metabolic processes and mitochondrial functions. To further explore the biological mechanisms and functions of glutarylation, it is significant to predict the potential glutarylation sites. In the existing glutarylation site predictors, experimentally verified glutarylation sites are treated as positive samples and non-verified lysine sites as the negative samples to train predictors. However, the non-verified lysine sites may contain some glutarylation sites which have not been experimentally identified yet. Methods In this study, experimentally verified glutarylation sites are treated as the positive samples, whereas the remaining non-verified lysine sites are treated as unlabeled samples. A bioinformatics tool named PUL-GLU was developed to identify glutarylation sites using a positive-unlabeled learning algorithm. Results Experimental results show that PUL-GLU significantly outperforms the current glutarylation site predictors. Therefore, PUL-GLU can be a powerful tool for accurate identification of protein glutarylation sites. Conclusion A user-friendly web-server for PUL-GLU is available at http://bioinform.cn/pul_glu/.
COVID‐19 critical illness pathophysiology driven by diffuse pulmonary thrombi and pulmonary endothelial dysfunction responsive to thrombolysis

Abstract Patients with severe COVID‐19 disease have been characterized as having the acute respiratory distress syndrome (ARDS). Critically ill COVID‐19 patients have relatively well‐preserved lung mechanics despite severe gas exchange abnormalities, a feature not consistent with classical ARDS but more consistent with pulmonary vascular disease. Many patients with severe COVID‐19 also demonstrate markedly abnormal coagulation, with elevated d‐dimers and higher rates of venous thromboembolism. We present four cases of patients with severe COVID‐19 pneumonia with severe respiratory failure and shock, with evidence of markedly elevated dead‐space ventilation who received tPA. All showed post treatment immediate improvements in gas exchange and/or hemodynamics. We suspect that severe COVID‐19 pneumonia causes respiratory failure via pulmonary microthrombi and endothelial dysfunction. Treatment for COVID‐19 pneumonia may warrant anticoagulation for milder cases and thrombolysis for more severe disease.
CYTOSKELETAL PROTEIN CHANGES IN HEPATOCYTES OF BILE DUCT-LIGATED RATS

Intermediate filament-rich cytoskeletal protein was extracted from normal and 7 or 21-day bile duct-ligated rat hepatocytes, and analyzed by both one and two-dimensional gel electrophoresis. The most marked change in the bile duct-ligated rats was an increase in 44kd polypeptide, determined by immunoblotting to be actin. Cytokeratin, the intermediate filament type found in hepatocytes, was also slightly increased. However, a marked decrease of the basic side spot of 55kd paired cytokeratin components was noted on two-dimensional gel electrophoresis. Fluorescent staining of liver tissue F-actin using NBD-phallacidin showed no remarkable difference between the two groups. Therefore, the increased actin content of hepatocyte after bile duct ligation may be mainly G-actin rather than F-actin. These changes in hepatocyte cytoskeleton seem to be a cellular adaptation to the microenvironment.
Habitat, trophic level, and residence of marine mammals in the Gulf of California assessed by stable isotope analysis

Approximately 32 species of marine mammals of the Gulf of California (GC) share habitat and resources in this ecosystem. Unusually high δ15N values at the base of the food web in the GC permeate up all trophic levels, distinguishing the isotopic signature of the GC from other ecosystems in the Eastern North Pacific. Values of δ13C and δ15N were acquired from particulate organic matter (POM) of surface sediment, zooplankton, mollusks, crustaceans, fish, and marine mammals in the GC to construct a general trophic structure and were complemented with additional isotope data from the literature. Aims were to: estimate marine mammal trophic levels and habitat preferences; distinguish between GC residents and visitors; and assess potential trophic overlap among the most common and abundant cetacean species. Trophic level 1 (TL1), represented by POM, showed average (± SD) δ13C and δ15N values of −21.4 ± 0.5‰ and 9.6 ± 0.7‰, bulk zooplankton (TL2) showed −18.8 ± 0.7‰ and 11.8 ± 1.4‰, while TL3, represented by baleen whales, some fish, squid, and seabirds, showed δ13C values between −13 and −16‰ and δ15N values between 16.5 and 20‰. Marine mammals occupied the entire coastal and pelagic isotope gradient (δ13C values from −12 to −18.1‰), with most of the species at TL4 (δ15N values from 17 to 23‰), whereas Orcinus orca occupied TL5 (25.8‰ maximum value). The odontocetes Mesoplodon peruvianus, Globicephala macrorhynchus, Grampus griseus, Kogia sima, Delphinus delphis, D. capensis, and Tursiops truncatus had both GC resident and visitor representatives, and the latter 3 species showed a significant degree of trophic and habitat overlap.
How the Profile of Student’s Views on the Nature of Science and Technology?

This study aims to provide a profile of students' views on the nature of Science and Technology or VNOST as a basis for the development of didactic designs that can teach aspects of technology in high school chemistry learning. This study involved 196 students who were randomly selected from grades XI from one of the secondary schools in Bandung. The modified VNOST questionnaire was used as a research instrument consisting of four aspects, namely: 1) the view of science, the purpose of science, the purpose of scientific research, 2) the view of technology, 3) the view of scientific knowledge and scientific theory, and 4) the view of the relationship between science, technology, and society. Each statement in the questionnaire was classified as "Realist", "Has Merit", and "Naïve". The data obtained were analyzed on each item using a frequency distribution to the students' VNOST group. "Realist" VNOST is used as a good indicator of VNOST views. The results revealed that most students have VNOST at the "Has Merit" level, which means that students' views on the nature of science and technology are still lacking and need to be improved. For this reason, educators need to integrate science and technology in science learning in schools.
Estimating Survival Rate from Tag Returns: Model Tests and Sample Size Determination

This paper brings to the attention of fishery biologists a method of estimating survival and exploitation rates when a series of tag recaptures from angler-killed fish is available; this model is appropriate only for recaptures that are removed from the population. Tests for the appropriateness of the model and methods for determining sample size are presented. The test for the model is imperative since estimates of survival would be meaningless if data do not conform to model.
Composition and In Vitro Antioxidant Effects of Jellyfish Catostylus tagi from Sado Estuary (SW Portugal)

The jellyfish Catostylus tagi was studied as a food source. C. tagi is an abundant and unexplored resource of the Southwest Portuguese coast. The umbrella and the oral arms were separately assayed. Inorganics, nitrogen, and lipid content were estimated, being identified the major mineral, amino acid and fatty acid (FA) components. The scavenging capacity of C. tagi aqueous extracts for hydroxyl (HO•), superoxide anion (O2 •-) and 1,1-diphenyl-2-picrylhydrazyl (DPPH) radicals were investigated, as well as their ferric ion reducing antioxidant power (FRAP). Both tissues presented acceptable levels of heavy metals for seafood with mercury and lead not being detected. The contents of boron, taurine, and polyunsaturated fatty acids (PUFA), together with the in vitro capacity to quench HO•, have shown that C. tagi is potentially interesting for human consumption as well as for the production of specialty ingredients for the manufacturing of aquaculture feeds.
TRITIUM‐LABELLED L CELL INTERFERON: FURTHER CHARACTERIZATION AND PURIFICATION BY ELECTROPHORESIS IN POLYACRYLAMIDE GELS

The preparation of highly purified interferons, stimulated in L cells by irradiated Newcastle disease virus (NDV,,), was recently reported (Paucker and Golgher, in press). By means of in vivo labelling techniques it was shown that triti&nino acids were incorporated into such materials (Golgher and Paucker, in press). Highest incorporation was achieved when the isotope was present during the interval of maximal liberation of interferon from the cells.1. These data thus provided the first direct demonstration that this type of interferon may represent a newly synthesized protein. Although purified, tritium-labelled L cell interferons harbored from 1-2 x 106 units per milligram of protein, filtration on Sephadex G 100 and sedimentation in sucrose density gradients disclosed the presence of other proteins which had incorporated the label as well. These proteins were not found in control preparations, and they may constitute other virus-induced products or interferon in an active form. In anticipation of using tritium-labelled interferons in studies on their uptake by host cells during the establishment of antiviral resistance, it was necessary to determine further to what extent the isotope had become associated with the structure of interferon. Such experiments were carried out by subjecting H3-labelled L cell interferons, after purification by ion exchange chromatography, to electrophoresis in polyacrylamide gels. The latter method was adopted because of its high resolution, which permits the separation of pvoteins with different electric charges and molecular sizes.
Effect of commercially purified deoxynivalenol and zearalenone mycotoxins on microbial diversity of pig cecum contents

Objective Deoxynivalenol (DON) and zearalenone (ZEN) are mycotoxins that frequently contaminate maize and grain cereals, imposing risks to the health of both humans and animals and leading to economic losses. The gut microbiome has been shown to help combat the effects of such toxins, with certain microorganisms reported to contribute significantly to the detoxification process. Methods We examined the cecum contents of three different dietary groups of pigs (control, as well as diets contaminated with 8 mg DON/kg feed or 0.8 mg ZEN/kg feed). Bacterial 16S rRNA gene amplicons were acquired from the cecum contents and evaluated by next-generation sequencing. Results A total of 2,539,288 sequences were generated with ~500 nucleotide read lengths. Firmicutes, Bacteroidetes, and Proteobacteria were the dominant phyla, occupying more than 96% of all three groups. Lactobacillus, Bacteroides, Megasphaera, and Campylobacter showed potential as biomarkers for each group. Particularly, Lactobacillus and Bacteroides were more abundant in the DON and ZEN groups than in the control. Additionally, 52,414 operational taxonomic units were detected in the three groups; those of Bacteroides, Lactobacillus, Campylobacter, and Prevotella were most dominant and significantly varied between groups. Hence, contamination of feed by DON and ZEN affected the cecum microbiota, while Lactobacillus and Bacteroides were highly abundant and positively influenced the host physiology. Conclusion Lactobacillus and Bacteroides play key roles in the process of detoxification and improving the immune response. We, therefore, believe that these results may be useful for determining whether disturbances in the intestinal microflora, such as the toxic effects of DON and ZEN, can be treated by modulating the intestinal bacterial flora.
Mechanical design and force control algorithm for a robot leg with hydraulic series-elastic actuators

This article presents a mechanical design structure for hydraulic actuators using the principle of series-elastic actuator, considering the restriction of mechanical structure, weight and size, as well as the requirement of high joint torques due to the large payload. An articulated leg was designed to incorporate with two of these elastic elements symmetrically for each joint. Further, for the hydraulic system with a position servo loop, a force control algorithm was particularly proposed and developed for joint torque tracking and Cartesian impedance control. Finally, a number of experiments were carried out on the leg platform, and the experimental results validated the effectiveness of the force control algorithm and the performance of the overall system.
Water and Fertilizer Effects on the Germination and Survival of Direct-Seeded Golden Paintbrush (Castilleja levisecta)

©2012 by the Board of Regents of the University of Wisconsin System. Should Coral Fragments Collected for Restoration be Subdivided to Create More, Smaller Pieces for Transplanting? graham Forrester (corresponding author: Department of natural Resources science, University of Rhode island, 105 coastal institute, 1 greenhouse Rd, Kingston, Ri 02881, gforrester@uri.edu), Russell Dauksis (Department of Biological science, University of Rhode island, Kingston, Ri), and Megan Ferguson (Department of Biological science, University of Rhode island, Kingston, Ri).