Multiple studies have shown that exposure to moderate water currents (exercise training) can improve growth and physiological performance of hatchery-reared fish. Proactive implementation of ...sustained aerobic swimming training can be particularly beneficial for improving post-release performance of fish in stock enhancement- or ‘ranching’ programs. Black seabream Acanthopagrus schlegelii is an important species in aquaculture and stock enhancement in the East China Sea. For juveniles of this species, we assess the impacts of exercise training at various flow rates on the morphology, growth performance, swimming ability, body composition and locomotors metabolism. A group of sibling juvenile fish (initial mass: 13.72 ± 0.29 g) underwent daily exercise training for 12 h (9:00–21:00) over 30 days at four different water velocities (0, 1, 2, or 4 body lengths per second, BL/s). All the trained fish exhibited a significant decrease in their respiratory metabolic rate during the test of swimming ability. Fish from the 2 BL/s training group exhibited a significantly increased burst swimming speed compared to the other groups. Fish from 1 BL/s training group showed elevated hexokinase activities in the white muscle and citrate synthase activities in the liver compared to the 0 BL/s group. Citrate synthase activities in the white muscle of fish from the 2 BL/s training group were elevated, along with citrate synthase activities in the liver, as compared to 0 BL/s. The fish in the 4 BL/s training group showed a tendency for increased crude protein content and a corresponding decrease in crude lipid content. Morphological analysis revealed that fish in the 4 BL/s group exhibited larger dorsal fins and more streamlined body profiles, compared to 0 BL/s. Activities of white muscle citrate synthase as well as liver hexokinase activity were higher in the 4 BL/s group, while lactate content activity in the white muscle were lower compared to 0 BL/s. These findings underscore the effectiveness of training at 2 BL/s, offering a promising strategy to enhance the performance of juvenile black seabream for stocking initiatives.
•Exercise training influences the morphology, swimming ability, and metabolic capacity of juvenile Acanthopagrus schlegelii.•A general pattern of exercise training resulting in reduced respiratory rates and faster burst swimming was demonstrated.•In breeding programs for stocking initiatives, a 30-day exercise training regimen at 2 BL/s is recommended.
Management professionals are increasingly adopting hybrid implementation models for applicative R&D projects, specific to dynamic environments, for rapidly adapting to various challenges. In this ...paper, being aware of the inadequacy of traditional management models in today's volatile and innovative socio-economic landscape, we made somehow a literature review and we adapted a method that, based on the use of a morphological analysis matrix, allowed us to prepare, by implementing in the first phase a focus-group pilot, the elaboration of personalized hybrid models, targeting mainly, as an original approach, research – development - innovation (RDI) projects. In the future, we intend to validate the method, through a case study evaluation, aiming to provide professionals with appropriate managerial solutions by developing a guide for selecting the best practices and adopting high-performing hybrid management models.
A new polymer based on nanocomposites was prepared to examine its radiation-shielding properties for potential industrial applications. Bismuth oxide (Bi2O3) nanoparticles and flower tungsten oxide ...nanostructures (FL-WO3) was hydrothermal synthesized. The Bi2O3 nanoparticles and WO3 nanostructure formation were confirmed using X-ray diffraction, scanning electron microscopy, and transmission electron microscopy (TEM). The Bi2O3 nanospheres had an average diameter of approximately 30–68 nm. The WO3 nanostructure and Bi2O3 nanoparticles were incorporated into low density polyethylene (LDPE) to fabricate a nanocomposite. The radiation-shielding performance of different nanocomposites was investigated. The results showed that LDPE loaded with WO3, WO3/Bi2O3, and Bi2O3 displayed higher tensile strength and thermal stability than unloaded LDPE. The results showed that the LDPE loaded with 3% Bi2O3 performed better gamma attenuation at 662, 1173, and 1332 keV. Additionally, WO3, WO3/Bi2O3, and Bi2O3 as ecofriendly additive-reinforced LDPE materials have a gamma-ray-shielding performance. The results indicate that LDPE containing Bi2O3 have higher gamma-ray-shielding properties than other nanocomposites.
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•Synthesis of bismuth oxide (Bi2O3) nanoparticles and flower WO3 nanostructures (FL-WO3) by hydrothermal simple method.•Fabrication and characterization of new polyethylene nanocomposites containing Bi2O3 and WO3 as an eco-friendly additive.•Usage of LDPE/WO3/Bi2O3 composite that should be utilized the gamma radiation shielding.
•Morphological awareness (MA) contributes to reading comprehension (RC) indirectly.•Reading vocabulary and morphological analysis mediate MA-RC relationship for all.•Word reading fluency mediates ...MA-RC only for limited English proficient students.•Call for differential instructional support for children with varying proficiency.
The current study examined how morphological awareness contributes to reading comprehension across three levels of English proficiency designation. Participants were 377 fourth- and fifth-grade students, including 198 native English speakers (NE group) and two groups of English learners: 117 students with fluent English proficiency (FEP) and 62 students with limited English proficiency (LEP). Students were assessed on morphological analysis (the ability to use morphological information to infer word meanings while reading), morphological awareness, word reading fluency, reading vocabulary, and reading comprehension. Results showed that the NE and FEP groups were better able to use morphological analysis to infer new word meanings while reading than the LEP group. Multiple-group path modeling indicated that, for all three groups, the relationship between morphological awareness and reading comprehension was mediated by reading vocabulary and morphological analysis; word reading fluency mediated the relationship only for the LEP group. The results call for attention to the role of English proficiency in how morphological awareness supports reading comprehension.
Background: Metallic nano-oxide has been influenced the environment in the past two decades. Their consequences are dreadfully uncertain. The increased graph of their interference suggested many ...extensive studies in various fields of the environment. The Gossypium hirsutum one of the prime harvest plants in India has been chosen for studying the impacts of metallic nano-oxide on their morphological characters as well as their fresh shoot and root weights.
Methods: Study has been done in July 2020 as a randomized triplet. The need for the study was fulfilled by the four different metallic nano-oxides with their five specific concentrations. The metallic nano-oxides were titanium oxide, silver oxide, copper oxide and zinc oxide. The five concentrations 00 ppm, 40 ppm, 60 ppm, 80 ppm and 100 ppm were taken from each one of metallic nano-oxide. Result: The zinc oxides treatment gave noteworthy positive growth and development in Gossypium hirsutum from germination to the blossoming time. Conversely, the concentrations of silver oxides were found little toxic for the growth of species. The copper and titanium oxides indicated little diversity in their growth patterns. The germination studies calculated best with titanium oxide treatment. The 80ppm concentration of copper oxide also reported better results at germination in comparison to control.
The genus Gladiolus L. (Iridaceae) includes about 250–280 species of perennial herbaceous corms, distributed in Africa, Madagascar and Eurasia. The taxonomy of the genus is not simple, since the ...characteristics of the species are quite confusing. Our article presents the results of a comparative palyno-morphological analysis of all 9 species and 2 subspecies of the genus Gladiolus of the Armenian flora. The purpose of the work is to identify diagnostic characteristics of pollen used to distinguish individual taxa. Six morphological characters, namely the length of the polar axis (P), as well as the length of the large and small equatorial diameters (E1 and E2, respectively), exine thickness and the number of echinae and perforations per unit area of the pollen surface were measured using light microscopy (LM) and scanning electron microscopy (SEM). Literature data, as well as the results of our previous studies, showed that the genus is characterized by stenopalynous anasulcate pollen grains with a two-lane operculum. In the presence of significant uniformity in pollen characteristics, our studies revealed that among the species studied, G. hajastanicus and G. kotschyanus have slightly larger pollen grain sizes, and the pollen of the species G. tenuis is characterized by a minimal number of both echinae and perforations per unit surface area of the pollen grain (using SEM). A certain difference has also been established between the subspecies of the species G. kotschyanus. In particular, the sizes of pollen grains of G. kotschyanus subsp. kotschyanus (based on E1) is slightly larger than in G. kotschyanus subsp. distichus. At the same time, the number of echinae and perforations per unit surface of a pollen grain (at the SEM level) in the subspecies G. kotschyanus subsp. distichus is approximately twice as large as G. kotschyanus subsp. kotschianus.
The Islamic heritage constitutes a very precious treasure in Algeria, especially the places of worship (mosques), which reflect the symbol of this heritage. They are considered important landmarks in ...cities through architectural elements such as the dome and the minaret. Minarets are used by the muezzin to invite people to pray; they were previously built near the mosque or inside it, next to the prayer room. Later, they appeared as angular towers of mausoleums. This research is part of an analytical study of the minarets in Algeria during the medieval period (Bani Hamad, Moravid, Zayyanid, Marinid, and Ottoman) which were selected and then classified according to their various typologies (dimensions, forms, designs, etc.), and evolution over time. The main objectives of this work are to search for the forms that determine the typology of the minarets of each period. It also examines the correlation between dimensions and geometric parameters employed in the design conception of these minarets. The research followed a monographic method that relies on field observation and documentation, while including a thorough reading of history. The results show that the constant form of the vertical section of the minaret, with the same dimensions between the top and bottom, represents two-thirds of the main tower of the minarets. We also conclude that the square shape of the horizontal section of the minaret represents two-thirds of the main tower of the minarets, which expresses the most earthquake-resistant form. These dimensions play a pivotal role in enhancing the minaret's visual allure and architectural equilibrium, in addition to their earthquake resistance virtues.
Dziedzictwo islamskie stanowi bardzo cenny skarb w Algierii, szczególnie miejsca kultu (meczetów), które odzwierciedlają symbol tego dziedzictwa. Są one uważane za ważne punkty orientacyjne w miastach dzięki elementom architektonicznym, takim jak kopuła i minaret. Minarety są używane przez muezzina do wzywania ludzi do modlitwy; pierwotnie były budowane w pobliżu meczetu lub w jego wnętrzu, obok sali modlitewnej. Później pojawiły się jako kątowe wieże mauzoleów. Niniejsze badanie jest częścią analizy minaretów w Algierii w okresie średniowiecza (Bani Hamad, Morawidowie, Zajjanidowie, Marynidzi i Osmanowie), które zostały wybrane, a następnie sklasyfikowane według różnych typologii (wymiary, formy, projekty itp.) oraz ewolucji w czasie. Głównymi celami tej pracy jest poszukiwanie form, które określają typologię minaretów każdego okresu. Zbadano również korelację między wymiarami a parametrami geometrycznymi stosowanymi w koncepcji projektowania tych minaretów. Badanie opierało się na metodzie monograficznej polegającej na obserwacji terenowej i analizie dokumentacji, uwzględniając dokładne czytanie historii. Wyniki pokazują, że stała forma pionowego przekroju minaretu, z tymi samymi wymiarami na górze i na dole, stanowi dwie trzecie głównej wieży minaretów. Wnioskujemy również, że kwadratowy kształt poziomego przekroju minaretu stanowi dwie trzecie głównej wieży minaretów, co stanowi najbardziej odporną formę na trzęsienia ziemi. Te wymiary odgrywają kluczową rolę w zwiększaniu wizualnej atrakcyjności i architektonicznej równowagi minaretu, oprócz ich zalet w zakresie odporności na trzęsienia ziemi.
The singular spectrum decomposition (SSD) is an effective signal denoising tool and has been attracted much attention in fault diagnosis. However, the filtering effect and calculation efficiency of ...SSD are seriously affected by the embedding dimension of trajectory matrix. To overcome these disadvantages, the improved SSD (ISSD) is proposed in this paper. A length factor is designed to optimize the construction of trajectory matrix, which considers the fault information in both time-domain and frequency-domain. A series of analysis, including impulse response analysis and multi-components signal decomposition, demonstrate the ISSD lifts the performance of SSD. After that, a new indicator, named singular Gini index, is applied to select the optimal singular spectrum components (SSCs) decomposed by the ISSD. To further supplement the impulses extraction effect of the ISSD, the sparsity operation is improved by combing the morphological analysis to process the vibration and sound signals. The sparsity factor is updated in each iteration and the structure element in morphological analysis is determined adaptively. Benefiting from the virtues of ISSD and sparsity analysis, the fault impulses in the processed signal are more prominent. Finally, according to the information of bearing characteristic frequencies in the spectrum, the fault type of bearing is determined. The reliability and feasibility of the proposed method is identified by analyzing the different simulation and experimental cases.
Phosphorus recovery has attracted increasing interest due to the potential depletion of phosphorus resources. One promising solution is to recover phosphorus via struvite precipitation from ...wastewater or other waste that is in rich of phosphate. However, product quality control during such process is always challenging due to the variation and complexity of wastewater compositions. For example, subcritical wet oxidation (SCWO) effluent is rich in phosphorus and nitrogen but contains a large amount of acetic acid, while its effect on struvite recovery is hardly known. Therefore, central composite design (CCD), considering pH, acetic acid level, Mg level and Ca level, was used to evaluate the effect of acetic acid on struvite purity, phosphorus removal, morphology and reaction kinetics. The experimental data were statistically analysed by analysis of variance (ANOVA) and principal components analysis (PCA). The results indicate that pH and Mg level have a significant impact on phosphorus removal (pH: p-value < 0.0001, Mg: p-value < 0.0001) and struvite purity (pH: p-value = 0.0410, Mg: p-value < 0.0001), Ca level only affects the struvite purity (p-value = 0.0333). The presence of acetic acid, within the studied range (8.77–34.53 mM), has a negligible effect on struvite morphology, phosphorus removal and reaction kinetics, but a slightly positive effect on struvite purity. Findings of this research would be beneficial to determine the feasibility of acetic acid-rich wastewater as a phosphorus source for struvite recovery.
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•The effect of acetic acid on phosphorus recovery was investigated.•Interactions between process variables and acetic acid were further explored.•Struvite precipitation is unlikely to be significantly affected by acetic acid.
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