bluuebunny/crossref_metadata_2025 huggingface dataset:
Mapping Course Sustainability by Embedding the SDGs Inventory into the University Curriculum: A Case Study from National University of Kaohsiung in Taiwan
Authors: Chang Ya-Ching , Lien Hsing-Lung
Published: May 2020

A course inventory module, based on the Curriculum Framework for the Sustainable Development Goals (SDGs) published by the Commonwealth Secretariat, has been embedded into the online curriculum system at the National University of Kaohsiung (NUK) since 2018. The primary aim of this study is to explore the sustainability status of the course offerings and to understand the interdisciplinary capacity in pursuing the SDGs at NUK. At the university level, a total of 1200–1300 courses (approximately 57% of courses) were reported to be related to SDGs, where the curriculum of NUK mainly emphasized SDGs 3, 4, 8, 9 and 16. However, our study indicates that many SDGs are still not focused in the curriculum of all colleges. Two patterns of the SDGs-related course framework were observed at the college level: One is the college course offerings linked to a wide variety of SDG content; while the second pattern is the college course offerings linked only to specific SDG content, mainly dependent on the subject areas of colleges. Our study suggests that the number of SDGs covered by a course reflects the diversity of the sustainability topics covered in the course. The metric gives an indication of the areas covered and, thus, also points to blind spots (i.e., insufficiencies). Moreover, it can also give an indication of the diversity within colleges, which could suggest future paths for transdisciplinary development. An understanding of the baseline status of sustainability in the university curriculum provides opportunities for universities to plan their strategies for sustainability and prioritize the allocation of resources accordingly.
New Weighted Opial-Type Inequalities on Time Scales for Convex Functions
Authors: El-Deeb Ahmed A. , Baleanu Dumitru
Published: May 2020

Our work is based on the multiple inequalities illustrated in 1967 by E. K. Godunova and V. I. Levin, in 1990 by Hwang and Yang and in 1993 by B. G. Pachpatte. With the help of the dynamic Jensen and Hölder inequality, we generalize a number of those inequalities to a general time scale. In addition to these generalizations, some integral and discrete inequalities will be obtained as special cases of our results.
Variational Principles for Two Kinds of Coupled Nonlinear Equations in Shallow Water
Authors: Cao Xiao-Qun , Guo Ya-Nan , Hou Shi-Cheng , Zhang Cheng-Zhuo , Peng Ke-Cheng
Published: May 2020

It is a very important but difficult task to seek explicit variational formulations for nonlinear and complex models because variational principles are theoretical bases for many methods to solve or analyze the nonlinear problem. By designing skillfully the trial-Lagrange functional, different groups of variational principles are successfully constructed for two kinds of coupled nonlinear equations in shallow water, i.e., the Broer-Kaup equations and the (2+1)-dimensional dispersive long-wave equations, respectively. Both of them contain many kinds of soliton solutions, which are always symmetric or anti-symmetric in space. Subsequently, the obtained variational principles are proved to be correct by minimizing the functionals with the calculus of variations. The established variational principles are firstly discovered, which can help to study the symmetries and find conserved quantities for the equations considered, and might find lots of applications in numerical simulation.
Diversity and Toxigenicity of Fungi that Cause Pineapple Fruitlet Core Rot
Authors: Barral Bastien , Chillet Marc , Doizy Anna , Grassi Maeva , Ragot Laetitia , Léchaudel Mathieu , Durand Noel , Rose Lindy Joy , Viljoen Altus , Schorr-Galindo Sabine
Published: May 2020

The identity of the fungi responsible for fruitlet core rot (FCR) disease in pineapple has been the subject of investigation for some time. This study describes the diversity and toxigenic potential of fungal species causing FCR in La Reunion, an island in the Indian Ocean. One-hundred-and-fifty fungal isolates were obtained from infected and healthy fruitlets on Reunion Island and exclusively correspond to two genera of fungi: Fusarium and Talaromyces. The genus Fusarium made up 79% of the isolates, including 108 F. ananatum, 10 F. oxysporum, and one F. proliferatum. The genus Talaromyces accounted for 21% of the isolated fungi, which were all Talaromyces stollii. As the isolated fungal strains are potentially mycotoxigenic, identification and quantification of mycotoxins were carried out on naturally or artificially infected diseased fruits and under in vitro cultures of potential toxigenic isolates. Fumonisins B1 and B2 (FB1-FB2) and beauvericin (BEA) were found in infected fruitlets of pineapple and in the culture media of Fusarium species. Regarding the induction of mycotoxin in vitro, F. proliferatum produced 182 mg kg⁻1 of FB1 and F. oxysporum produced 192 mg kg⁻1 of BEA. These results provide a better understanding of the causal agents of FCR and their potential risk to pineapple consumers.
Polyinosinic: Polycytidylic Acid and Murine Cytomegalovirus Modulate Expression of Murine IL-10 and IL-21 in White Adipose Tissue
Authors: Garcia-Valtanen Pablo , Guzman-Genuino Ruth Marian , Hayball John D. , Diener Kerrilyn R.
Published: May 2020

White adipose tissue (WAT) produces interleukin-10 and other immune suppressors in response to pathogen-associated molecular patterns (PAMPs). It also homes a subset of B-cells specialized in the production of IL-10, referred to as regulatory B-cells. We investigated whether viral stimuli, polyinosinic: polycytidylic acid (poly(I:C)) or whole replicative murine cytomegalovirus (MCMV), could stimulate the expression of IL-10 in murine WAT using in vivo and ex vivo approaches. Our results showed that in vivo responses to systemic administration of poly(I:C) resulted in high levels of endogenously-produced IL-10 and IL-21 in WAT. In ex vivo WAT explants, a subset of B-cells increased their endogenous IL-10 expression in response to poly(I:C). Finally, MCMV replication in WAT explants resulted in decreased IL-10 levels, opposite to the effect seen with poly(I:C). Moreover, downregulation of IL-10 correlated with relatively lower number of Bregs. To our knowledge, this is the first report of IL-10 expression by WAT and WAT-associated B-cells in response to viral stimuli.
The Role of Extracellular Vesicles as Allies of HIV, HCV and SARS Viruses
Authors: Giannessi Flavia , Aiello Alessandra , Franchi Francesca , Percario Zulema Antonia , Affabris Elisabetta
Published: May 2020

Extracellular vesicles (EVs) are lipid bilayer-enclosed entities containing proteins and nucleic acids that mediate intercellular communication, in both physiological and pathological conditions. EVs resemble enveloped viruses in both structural and functional aspects. In full analogy with viral biogenesis, some of these vesicles are generated inside cells and, once released into the extracellular milieu, are called “exosomes”. Others bud from the plasma membrane and are generally referred to as “microvesicles”. In this review, we will discuss the state of the art of the current studies on the relationship between EVs and viruses and their involvement in three important viral infections caused by HIV, HCV and Severe Acute Respiratory Syndrome (SARS) viruses. HIV and HCV are two well-known pathogens that hijack EVs content and release to create a suitable environment for viral infection. SARS viruses are a new entry in the world of EVs studies, but are equally important in this historical framework. A thorough knowledge of the involvement of the EVs in viral infections could be helpful for the development of new therapeutic strategies to counteract different pathogens.
Evaluation of Long-Term Impacts of CO2 Leakage on Groundwater Quality Using Hydrochemical Data from a Natural Analogue Site in South Korea
Authors: Do Hyun-Kwon , Yun Seong-Taek , Yu Soonyoung , Ryuh Yon-Gyung , Choi Hyeon-Su
Published: May 2020

Three hydrochemical types of CO2-rich water (i.e., Na-HCO3, Ca-Na-HCO3 and Ca-HCO3) occur together in the silicate bedrock (granite and gneiss) of Gangwon Province in South Korea. As a natural analogue of geological carbon storage (GCS), this can provide implications for the environmental impacts of the leakage of CO2 from deep GCS sites. By using hydrochemical and isotopic datasets that were collected for previous and current studies, this study aimed to carefully scrutinize the hydrochemical differences in the three water types with an emphasis on providing a better understanding of the impacts of long-term CO2 leakage on groundwater quality (especially the enrichments of minor and trace metals). As a result, the Na-HCO3 type CO2-rich water contained higher Li, Rb and Cs than the Ca-HCO3 type, whereas Fe, Mn and Sr were higher in the Ca-HCO3 type than in the Na-HCO3 type despite the similar geological setting, which indicate that the hydrochemical differences were caused during different geochemical evolutionary processes. The δ18O and δD values and tritium concentrations indicated that the Na-HCO3 type was circulated through a deep and long pathway for a relatively long residence time in the subsurface, while the Ca-HCO3 type was strongly influenced by mixing with recently recharged water. These results were supported by the results of principal component analysis (PCA), whose second component showed that the Na-HCO3 type had a significant relation with alkali metals such as Li, Rb and Cs as well as Na and K and also had a strong relationship with Al, F and U, indicating an extensive water-rock interaction, while the Ca-HCO3 type was highly correlated with Ca, Mg, Sr, Fe and Mn, indicating mixing and reverse cation exchange during its ascent with hydrogeochemical evolution. In particular, the concentrations of Fe, Mn, U and Al in the CO2-rich water, the result of long-term water-rock interaction and cation exchange that was enhanced by CO2 leakage into silicate bedrock, exceeded drinking water standards. The study results show that the leakage of CO2 gas and CO2-rich fluid into aquifers and the subsequent hydrogeochemical processes can degrade groundwater quality by mobilizing trace elements in rocks and consequently may pose a health risk.
Ecosystem Metabolism in Small Ponds: The Effects of Floating-Leaved Macrophytes
Authors: Hornbach Daniel J. , Schilling Emily G. , Kundel Holly
Published: May 2020

Small ponds constitute a significant number of standing water bodies on earth and may contribute to CO2 uptake or release into the atmosphere. Despite their importance, few studies have examined ecosystem metabolism in ponds, especially in ponds that may be dominated by floating-leaved macrophytes. In this study, we examined ecosystem metabolism by measuring changes in dissolved oxygen levels every 10 min from late May through late October for four shallow ponds (0.5–1.5 m) in east-central Minnesota, USA. Ponds had varying levels of floating-leaved macrophytes from sparse (<1% coverage) to abundant (61% coverage). We found significant differences in a number of physical/chemical factors including P, N, DOC, water temperature and light penetration. We also found significant difference in gross primary production (GPP—average ranged from 2.2 to 5.5 mg O2/L/day), respiration (R—average ranged from −6.8 to −3.6 mg O2/L/day) and net ecosystem production (NEP—average ranged from −1.5 to −0.1 mg O2/L/day) among the ponds. On average, all of the ponds were heterotrophic (R > GPP). While it appeared that floating-leaved macrophytes provided a significant impact on ecosystem metabolism, there was not a one-to-one correspondence between the amount of macrophytes and the level of ecosystem metabolism.
Long-Term Consequences of Water Pumping on the Ecosystem Functioning of Lake Sekšu, Latvia
Authors: Zawiska Izabela , Dimante-Deimantovica Inta , Luoto Tomi P. , Rzodkiewicz Monika , Saarni Saija , Stivrins Normunds , Tylmann Wojciech , Lanka Anna , Robeznieks Martins , Jilbert Tom
Published: May 2020

Cultural eutrophication, the process by which pollution due to human activity speeds up natural eutrophication, is a widespread and consequential issue. Here, we present the 85-year history of a small, initially Lobelia–Isoëtes dominated lake. The lake’s ecological deterioration was intensified by water pumping station activities when it received replenishment water for more than 10 years from a eutrophic lake through a pipe. In this study, we performed a paleolimnological assessment to determine how the lake’s ecosystem functioning changed over time. A multi-proxy (pollen, Cladocera, diatoms, and Chironomidae) approach was applied alongside a quantitative reconstruction of total phosphorus using diatom and hypolimnetic dissolved oxygen with chironomid-based transfer functions. The results of the biotic proxy were supplemented with a geochemical analysis. The results demonstrated significant changes in the lake community’s structure, its sediment composition, and its redox conditions due to increased eutrophication, water level fluctuations, and erosion. The additional nutrient load, particularly phosphorus, increased the abundance of planktonic eutrophic–hypereutrophic diatoms, the lake water’s transparency decreased, and hypolimnetic anoxia occurred. Cladocera, Chironomidae, and diatoms species indicated a community shift towards eutrophy, while the low trophy species were suppressed or disappeared.
Dissolution-Desorption Dynamics of Strontium During Elution Following Evaporation: pH and Ionic Strength Effects
Authors: Weaver William C. , Kibbey Tohren C. G. , Papelis Charalambos
Published: May 2020

Radioactive strontium-90 (90Sr2+) is a fission byproduct of uranium and plutonium production, and therefore understanding its environmental fate is of particular importance for predicting the evolution of long-term risk from historical releases. The nonradioactive strontium cation, Sr2+, is a chemical analog for 90Sr2+ that is often used in studies designed to understand the environmental behaviors of 90Sr2+. The focus of this work was on understanding the dynamics of remobilization of strontium following evaporation to dryness in porous media. Evaporation is ubiquitous in the unsaturated zone, and has the potential to significantly impact the dynamics of transport by driving adsorption or precipitation on solid surfaces. For this work, a series of transport experiments were conducted examining the behavior of strontium over a range of pH values, ionic strengths, and concentrations. Saturated transport experiments were conducted, followed by experiments designed to examine the release and transport following evaporation to dryness. Results show increasing saturated retardation with increasing pH, decreasing ionic strength, and decreasing concentration, with the concentration exhibiting the strongest effect. Breakthrough curves at low concentrations were also found to be consistent with significant rate-limited desorption. Remobilization elution curves measured following evaporation to dryness exhibited the high initial effluent concentrations, exceeding the influent strontium concentration, most likely caused by the initial dissolution and accumulation of strontium by the advancing solution. Concentrations at later times were found to be largely consistent with the dynamics of saturated transport for the systems studied.
Evaluation of Thirty-Eight Models of Drippers Using Reclaimed Water: Effect on Distribution Uniformity and Emitter Clogging
Authors: Baeza Rafael , Contreras Juana I.
Published: May 2020

Emitter clogging is a problem in drip irrigation systems, and it is accentuated when using reclaimed water. The objective of this work was to evaluate the different commercial models of drippers used for irrigation with reclaimed water in greenhouse horticultural crops. Thirty-eight commercial emitter models were selected. The selection was based on recommended models from different irrigation installation companies and manufacturers for this type of water. These emitters had different types of pipeline insertion (inter-line, in-line, and on-line) and different pressure compensation (compensating and non-compensating pressure). The emitter models were analyzed in the laboratory, determining the manufacturing variation coefficient (Cv) and the emitter equation (Ee), and subsequently two consecutive tests were established in the greenhouse, with a period of irrigation inactivation between tests, as well as different reclaimed water qualities. The reclaimed water was regenerated urban wastewater from the city of Almería. Distribution uniformity coefficient (DU) and clogging of the emitter (Ec) were evaluated in the greenhouse tests. Of the 38 models analyzed, only one of them did not comply with the International Organization for Standardization (ISO) standard, providing a Cv greater than 0.07. At the commencement of the greenhouse trial (0 h of irrigation), 14 dripper models performed with an excellent DU, above 95%, and all emitter models presented a DU above 85%. At the end of the second greenhouse trial (206 h of irrigation), three models recorded a DU of less than 85%. The application of reclaimed wastewater produced events of clogging and reducing uniformity in the studied models. On-line pressure-compensating emitter models had the worst performance. The irrigation inactivation period produced an improvement in uniformity values. By improving the quality of reclaimed water, all types of emitters showed a better performance during the irrigation season. Notably, pressure-compensating emitter models even showed some cleaning capacity, because their clogging was reduced in the second trial.
Three-Dimensional Wave-Induced Dynamic Response in Anisotropic Poroelastic Seabed
Authors: Hsu Cheng-Jung , Hung Ching
Published: May 2020

This paper presents a novel analytical solution, which is developed for investigating three-dimensional wave-induced seabed responses for anisotropic permeability. The analytical solution is based on the assumption of the poroelastic and the u − p dynamic form, which considers the inertia force of the soil skeleton. In this paper, the problem is regarded as an eigenvalue problem through a first-order ordinary differential equation in matrix form. The problematic eigenvector involved in the solution is dealt with using numerical computation, and a process is proposed to implement the present solution for the desired dynamic response. A verification, which is compared with two existing solutions, demonstrates an agreement with the present solution. The results show that the amplitude profile of seabed response for a shorter wave period varies significantly. A comparison between the anisotropic and transverse isotropic, as well as isotropic permeabilities reveals that the error of vertical effective stress on the seabed bottom can reach 74 . 8 % for the isotropic case. For anisotropic permeability, when the wave direction is parallel to the higher horizontal permeability direction, the amplitude profiles of pore pressure and vertical effective stress exhibit the greatest dissipation and increment, respectively. For transverse isotropic permeability, the vertical effective stress is independent of the wave direction, which results in the two horizontal effective stresses on the seabed bottom being identical to each other and independent of the wave direction. Our comprehensive analysis provides insight into the effect of anisotropic permeability on different wave periods and wave directions.
Correction: Maykot, J.K. and Ghisi, E. Assessment of A Rainwater Harvesting System in A Multi-Storey Residential Building in Brazil. Water 2020, 12, 546
Authors: Maykot Jéssica Kuntz , Ghisi Enedir
Published: May 2020

The authors wish to make the following correction to this paper [...]
Real Time Flow Forecasting in a Mountain River Catchment Using Conceptual Models with Simple Error Correction Scheme
Authors: Montes Nicolás , Aranda José Ángel , García-Bartual Rafael
Published: May 2020

Methods in operational hydrology for real-time flash-flood forecasting need to be simple enough to match requirements of real-time system management. For this reason, hydrologic routing methods are widely used in river engineering. Among them, the popular Muskingum method is the most extended one, due to its simplicity and parsimonious formulation involving only two parameters. In the present application, two simple conceptual models with an error correction scheme were used. They were applied in practice to a mountain catchment located in the central Pyrenees (North of Spain), where occasional flash flooding events take place. Several relevant historical flood events have been selected for calibration and validation purposes. The models were designed to produce real-time predictions at the downstream gauge station, with variable lead times during a flood event. They generated accurate estimates of forecasted discharges at the downstream end of the river reach. For the validation data set and 2 h lead time, the estimated Nash-Sutcliffe coefficient was 0.970 for both models tested. The quality of the results, together with the simplicity of the formulations proposed, suggests an interesting potential for the practical use of these schemes for operational hydrology purposes.
Can the Stream Quantification Tool (SQT) Protocol Predict the Biotic Condition of Streams in the Southeast Piedmont (USA)?
Authors: Donatich Sara , Doll Barbara , Page Jonathan , Nelson Natalie
Published: May 2020

In some states, the Stream Quantification Tool (SQT) has been adopted to quantify functional change of stream mitigation efforts. However, the ability of the SQT protocol to predict biological function and uphold the premise of the Stream Functions Pyramid (Pyramid) remains untested. Macroinvertebrate community metrics in 34 headwater streams in Piedmont, North Carolina (NC, USA) were related to NC SQT protocol (version 3.0) factors and other variables relevant to ecological function. Three statistical models, including stepwise, lasso, and ridge regression were used to predict the NC Biotic Index (NCBI) and Ephemeroptera, Plecoptera, and Trichoptera (EPT) richness using two datasets: 21 SQT variables and the SQT variables plus 13 additional watershed, hydraulic, geomorphic, and physicochemical variables. Cross-validation revealed that stepwise and ridge outperformed lasso, and that the SQT variables can reasonably predict biology metrics (R2 0.53–0.64). Additional variables improved prediction (R2 0.70–0.88), suggesting that the SQT protocol is lacking metrics important to macroinvertebrates. Results moderately support the Pyramid: highly predictive ridge models included metrics from all levels, while highly predictive stepwise models included metrics from higher levels, and not watershed hydrology. Reach-scale metrics were more important than watershed hydrology, providing encouragement for projects limited by watershed condition.
Sentinel-2 Application to the Surface Characterization of Small Water Bodies in Wetlands
Authors: Pena-Regueiro Jesús , Sebastiá-Frasquet Maria-Teresa , Estornell Javier , Aguilar-Maldonado Jesús Antonio
Published: May 2020

Developing indicators to monitor environmental change in wetlands with the aid of Earth Observation Systems can help to obtain spatial data that is not feasible with in situ measures (e.g., flooding patterns). In this study, we aim to test Sentinel-2A/B images suitability for detecting small water bodies in wetlands characterized by high diversity of temporal and spatial flooding patterns using previously published indices. For this purpose, we used medium spatial resolution Sentinel-2A/B images of four representative coastal wetlands in the Valencia Region (East Spain, Mediterranean Sea), and on three different dates. To validate the results, 60 points (30 in water areas and 30 in land areas) were distributed randomly within a 20 m buffer around the border of each digitized water polygon for each date and wetland (600 in total). These polygons were mapped using as a base map orthophotos of high spatial resolution. In our study, the best performing index was the NDWI. Overall accuracy and Kappa index results were optimal for −0.30 threshold in all the studied wetlands and dates. The consistency in the results is key to provide a methodology to characterize water bodies in wetlands as generalizable as possible. Most studies developed in wetlands have focused on calculating global gain or loss of wetland area. However, inside of wetlands which hold protection figures, the main threat is not necessarily land use change, but rather water management strategies. Applying Sentinel-2A/B images to calculate the NDWI index and monitor flooded area changes will be key to analyse the consequence of these management actions.
Microbial assessment of potential functional dairy products with added dried herbs
Authors: Kiss Kármen Anita , Kapcsándi Viktória , Ligeti Rebeka , Hanczné Lakatos Erika
Published: May 2020

The market of dairy products is a dynamically developing sector of the food industry. Potential, functional dairy products, made by adding herbs or spices, will have antimicrobial and antioxidant effect due to the active biochemical agents of the plant additives. Furthermore, these active components will widen the storage life of food products and enhance their organoleptic properties too. We worked out a technology for creating fresh cheeses using a gentle pasteurizing method by treating the mixture of raw milk and 1.5% fat contained in commercial milk. As herb additives, we used citronella (Melissa officinalis), and peppermint (Mentha x piperita) harvested by us and dried them via Tyndall-method in convective dryer on 40 °C for 5.5 hours per day. The drying period took three days. We bought dried citronella and mint from the supermarket, which were dried by ionizing radiation, to compare the microbiological pollution with the herbs dried by us.

The main target of this research was to create a microbiologically stable, potential functional dairy product. However, because of the bad quality of the raw milk and the gentle heat treatment we used for sterilizing bulk milk, or else, cheeses were not safe for human consumption. As a consequence, we need further studies to modify our technology and get a microbiologically stable product.
Effect of different n-6/n-3 fatty acid proportion oil sources on reproduction performance and fatty acid profile of milk in modern genotype sows - Pleminary results
Authors: Roszkos Róbert , Tóth Tamás , Fébel Hedvig , Mézes Miklós
Published: May 2020

This study was conducted to investigate the effects of supplemental n-6 and n-3 fatty acids on sow’s milk fatty acid composition during the lactation period and on reproductive efficiency of sows in the subsequent gestation period. Data were collected on a total of 213 DanBred sows (108 control and 105 experimental) representing parity of 2–7, respectively. Control and experimental sows were placed in the same housing conditions during lactation and gestation period. Control group received 6.3 g of sunflower oil (SO) per kg feed as n-6 fatty acid supplementation, whilst experimental animals received the same amount of fish oil (FO) as n-3 fatty acid source. Diets were corn meal-extracted soybean meal based. The experiment was conducted in one replication as being a part of a longer and more comprehensive trial. It was found that the consumed long-chain polyunsaturated fatty acids (LC-PUFAs) appeared in the sow’s milk and changed its fatty acid profile. With this alteration, the n-6/n-3 ratio of experimental (FO) sows’ milk were narrower than in SO group (SO: 13.82 vs. FO: 5.89). The benefits of n-3 fatty acids supplementation were evident for the subsequent reproduction cycle, when experimental sows heated more reliable and earlier than control (weaning to oestrus interval: SO: 5.86 vs. FO: 4.48 days). Only 2.33% of experimental sows (FO) did not heat within 7 days after weaning, but this was 12.36% in the control group (SO). The present study requires further research to evaluate the effect of n-3 fatty acids on maintenance of pregnancy and improved subsequent litter size.
Examination of drought stress of two genotype maize hybrids with different fertilization
Authors: Horváth Éva , Fejér Péter , Széles Adrienn
Published: May 2020

In the growing season of 2019, we analysed stress resulting from climatic factors on maize hybrids of different genotypes, with the aim of gaining a better understanding of the physiological responses of each hybrid, which might support the elaboration of a cost-effective irrigation plan.

Our experiments were carried out at the Látókép Experimental Station of the University of Debrecen on calcareous chernozem soil in a small-plot long-term field trial with strip plot design. In the scope of the experiment, N-fertilizer doses were applied as basic fertilizer and top-dressing in addition to the non-fertilized (control) treatment. The 60 and 120 kg N/ha doses applied as basic fertilizers in the spring were followed by top-dressing in the V6 phenophase with a +30 kg N/ha dose. Measurements were carried out with the involvement of the Renfor early (FAO 320) and Fornad (FAO 420) late maturity hybrids-

The stomata of the plants became more and more closed with the progression of the phenological phases; their stomatal conductance decreased. However, the hybrids responded differently to environmental stress. In the case of the Renfor hybrid, the highest conductance (669 mmol/m2-s) was recorded in the V12 phenophase with the 150 kg N/ha treatment. The stomata were more open due to the high turgor pressure, allowing plants to evaporate properly. The plant was in its worst physiological condition on 2nd July, at the time of the appearance of the last leaf in the case of the 120 kg N dose (224 mmol/m2-s). The value measured in the V12 phenophase has already shown that the stomata were closing due to the self-regulating system of the plant. It would have been necessary to dispense irrigation water following the measurement. This confirms the finding that water stress can be prevented by measuring stomatal conductance.

In the case of the Fornad hybrid, stomatal conductance was the highest on 12th June (630 mmol/m2-s) in the 90 kg N/ha treatment and it was the lowest (183 mmol/m2-s) in VT (emergence of the last leaf) phenophase in the 60 kg N/ha treatment. In this case, the appropriate time for applying irrigation water would have been early July, when the conditions for the plants were still adequate. Subsequently, the stomata began to close due to a reduction of the water resources available to them.

There was a significant correlation between soil moisture and stomatal conductance, as well as between temperature and stomatal conductance.
The effects of curing technology on the rheological and organoleptic features of meat products
Authors: Tudós Zoltán , Vass Anita , Hanczné Lakatos Erika , Ásványi Balázs
Published: May 2020

Meat products are important staple foodstuffs owing to their high protein, vitamin and mineral content. Meat plants do not only use traditional production technologies but also develop methods that preserve the nutritional value of meat or improve the texture and organoleptic features of meat products. These features play an important role in the consumer society. Consumers first meet the external features of meat and this experience influences their decisions. Our analyses compared a traditional and a new curing procedure. Besides organoleptic inspections, we analysed texture with a CT3 type Texture Analyser to obtain quantified information on the condition of meat samples in the various curing phases. We used our results to compare traditional and new curing procedures.
STUDY OF THE INFLUENCE OF STABILIZERS ON THE PROPERTIES OF CARBAMIDE FOR-MALDEHYDE BINDER AND FC PLYWOOD
Authors: Fedotov A. , Vahnina Tat'yana , Titunin Andrey , Sviridov Aleksandr
Published: May 2020

The problem of stabilizing the properties of the urea-formaldehyde binder during storage is relevant for both glued products and resins. Changing the performance of the resin during storage makes it difficult to apply a binder and leads to a deterioration in the physical and mechanical properties of plywood. The effect of glycerol, mono- and triethanolamine, as well as a mixture of glycerol and monoethanolamine on the nominal viscosity of the resin after 56 days of storage, has been studied. The use of glycerol and monoethanolamine (including in the complex) reduces the nominal viscosity of the resin by 13.5-24.8%. The use of triethanolamine as a stabilizer makes it possible to reduce the nominal viscosity by 35% in comparison with the index of an unstabilized oligomer. Mechanical properties of FC plywood based on the stabilized and unstabilized binder has been studied. It was found that glycerol additive (or glycerol in combination with monoethanolamine) significantly reduces strength characteristics of plywood, which makes it irrational to use these stabilizers. The addition of 0.2% triethanolamine to CFS allows a 35% reduction in the nominal viscosity of the resin, while the cohesive strength of the binder decreases by 1.5%. The result is within the framework of the dispersion of the indicator, i.e. strength reduction is negligible. The static bending strength of plywood with a stabilized triethanolamine binder is more important than that of control specimens without the addition of stabilizers. The results of the study enable to recommend the addition of triethanolamine in an amount of 0.2% by weight of urea-formaldehyde resin as a rational stabilizer
CREEP AND REVERSE CREEP OF NATURAL AND PLASTICIZED BIRCH WOOD WHEN PRESSING ACROSS THE FIBERS.
Authors: Shakirova Oksana
Published: May 2020

Pressed (modified) wood is a technological process of drying, impregnation and pressing (R 54577-2011 State Standard). The density of pressed wood, depending on the degree of pressing, ranges from 750 to 850 kg/m3. Strength, hardness toughness of this wood is several times greater than of natural wood. Coal oil, TCL (thermocatalytic cracking liquid), shale oil are most often used as wood antiseptics. They are plasticizers and change the nature of deformations during pressing.Experiments with natural and were conducted to obtain comparative data. Pressed wood contained 10% of TCL oily antiseptic by weight of absolute dry wood. Birch wood was used as the starting material. In this case, an antiseptic agent in an amount of 8-10% by weight of dry wood is evenly distributed over the entire cross section of the specimen. Direct and reverse creep was studied to assess time changes in deformation composition of wood, pressed across fibers. Measurements of direct and reverse creep of wood were carried out on a lever installation. The obtained modes can be used to optimize the technology of obtaining plasticized wood, because plasticization of wood with TCL oil reduces toughness 3-5 times (in the first phase of deformation), in the second phase - 1.1-1.5 times, in the third phase - 2.5-3 times. Transverse strain coefficient increases 1.2-1.3 times. Using creep curves of plasticized wood, it was found that oil impregnation gives 4-5 times greater reduction in the proportion of elastic deformations and, accordingly, increases the residual ones.
THE INFLUENCE OF PLANT LIFTER OPERATING MODES ON THE DIGGING QUALITY OF PLANTING MATERIAL
Authors: Kazakov Igor'
Published: May 2020

One of the important indicators of the quality of planting material grown in forest nurseries is preservation of roots and the amount of soil remaining on the root system of plants when they are excavated. Machines used in forest nurseries for digging planting material do not fully meet these requirements, since soil layer is not sufficiently loosened and soil is not separated from the root systems of plants. In addition, considerable effort is required to extract plants from the soil, and part of the roots is cut off. Modern plant lifters with active working bodies enable to separate the soil from the root systems of plants and ensure safety of the required amount on them, reducing the effort to extract plants from the soil. The article presents the results of studies of the influence of plant lifter operating modes on the quality of planting material harvesting, on the basis of which the rational oscillation frequency of the levers and beats within 675 counts/min is substantiated when applying one oscillation of 5.4 cm/count and operating speed 2.2 km/h. These operation modes of plant lifter ensure the preservation of soil on the root system of enlarged spruce seedlings in the amount of 136.2 g and allowable effort to remove them from the soil within 36.4 N.
EVALUATION OF SUSTAINABILITY AND ECOLOGICAL PROPERTIES OF A ROBOTIZED STUMP REMOVER EQUIPPED WITH WIDE-SECTION TYRES
Authors: Pryadkin Vladimir , Bartenev Ivan , Posmetev Viktor
Published: May 2020

The article analyzes the technical means for uprooting trees. Tools aggregated with wheel and caterpillar tractors of various traction classes are the most popular ones in Russia. Abroad, self-propelled stump removers with high engine power and high performance are used, which are in demand in various industries (forestry, agricultural and oil and gas complexes, road construction), when laying high-voltage power lines and their maintenance, as well as in other areas of the national economy. The analysis of technical means for uprooting trees has shown that the dominant trend is creation of stump removers that ensure safety of the process, its high productivity and decrease in the number of personnel on felling. Self-propelled robotic stump remover equipped with wide-profile low-pressure tires has been developed to implement innovative technologies in the forest complex. Ensuring the technological process is carried out by robot-eradicator in unmanned mode. It is achieved by using a technical vision system, navigation equipment, automated control of technological equipment, transmission and steering. The aim of the study was to evaluate the longitudinal stability of a robotic self-propelled stump remover during vertical transportation of a tree and environmental compatibility of its wheeled mover with soil and vegetation cover. Conducted theoretical studies have found that the proposed layout scheme of a self-propelled stump remover provides longitudinal stability when moving with a tree in an upright position without the use of ballast counterweights behind the rear axle. It was also found that the wheel mover of the stump remover equipped with wide-profile low-pressure tires is environmentally friendly when performing technological operations in the summer-autumn period
DYNAMICS OF HEIGHT RANGE DISTRIBUTION OF TREES IN THE FOREST SHELTER BELT WITH PARTICIPATION OF ENGLISH OAK (QUERCUS ROBUR L.) AND NORWAY MAPLE (ACER PLATANOIDES L.)
Authors: Gribacheva Olesya , Chernodubov Aleksey , Sotnikov Dmitriy
Published: May 2020

Protective afforestation is organizing basis of adaptive landscape agriculture. The aim of the study is to distribute the trees of English oak (Quercus robur L.) and Norway maple (Acer platanoides L.) in height to establish the complexity of stand structure. The differentiation of trees by height in the shelterbelt, which is located in the vicinity of the village Zolotarevka, Lugansk region, Stanichno-Lugansk district, has been considered. In the plantation under study, we laid two permanent test plots in accordance with 56-69-83 Industrial Standard. Relative height of each class of the ranked row, reduction numbers and ranks of maple and oak stands, forming a field-protecting strip, have been determined based on the results of enumeration taxation. Reduction numbers and ranks have been determined according to the methodology of L. V. Stonozhenko et al. The authors have revealed that the predominance of leader trees with 26-27 grades in the oak-tree stand of Quercus robur L. (first test plot) is explained by a decrease in the growth rate of the main part of the stand due to the sparse standing of trees. Analyzing the state of the stand, during the formation of the second tier (maple stand on the first test plot), growth and development of oak and is worsened. Thinning can be seen as the final result. The authors emphasize in the work that there is an improvement in the growth and development of English oak when simplifying maple stand (second test plot). The consequence of all these is more complicated form of plantation
BASIS OF MATHEMATICAL INTERACTION MODELS OF WHEEL PROPELLERS OF FORESTRY MACHINES WITH SLIDING SURFACES
Authors: Burmistrova Olga , Teterevleva Elena , Grigorev Igor , Kunitskaya O. , Manukovskiy Andrey , Rudov Sergey , Vostrikov Dmitriy
Published: May 2020

The purpose of the research, the results of which are presented in this article, is to analyze the scientific description of the properties of weak bearing movement surfaces of forest machines. The analysis has showed that universal mathematical models of the wheel propeller interaction with soil are based on the provisions of soil mechanics. This approach has been tested in the science of forestry production. It is successfully used by modern domestic and foreign researchers. However, with regard to the development and implementation of a mathematical description of interaction of ultra-low pressure

wheeled mover (for example, in all-terrain wheeled vehicle) with supporting surfaces, it is necessary to take into account the ratio of the sides of the mover’s contact spot with the soil, since: mover pressure on the ground is defined as the partial load of a single mover and the area contact spots; the distribution of compressive stress over the depth of the soil mass depends on the ratio of the length and width of the contact spot; the bearing capacity characterizing the resistance to shear of the soil layers depends not only on its physical and mechanical properties, but also on the parameters of the contact spot, which is

taken into account by special correction factors, the values of which depend on the aspect ratio of the contact spot. Soil rheology is considered to take into account the number of passes of a wheeled all-terrain vehicle along the route and its speed. One of the characteristics of the impact of the mover is exposure time. Value of the length of the contact spot is also used when determining the impact time of the mover on the soil.
EFFICIENCY ESTIMATION OF HYDRO-PNEUMATIC SUSPENSION OF A TIMBER TRUCK ACCORDING TO THE RESULTS OF SIMULATION MODELLING
Authors: Posmetev Valeriy , Drapalyuk Mikhail , Nikonov Vadim , Posmetev Viktor , Avdyuhin Aleksandr
Published: May 2020

The relevance of increasing the efficiency of timber transportation by forest transport vehicles through development of a promising hydropneumatic suspension scheme has been substantiated. A diagram of the proposed modular design suspension and logging vehicle equipped with this type of suspension has been presented. The results of its simulation have been also showed. A mathematical model of the movement of a six-wheeled timber truck in three-dimensional space has been developed to evaluate the use of such hydropneumatic suspensions in a forest car. The design scheme for constructing a timber truck dynamic model has been presented. The sequence of numerical integration at each time step has been described. It includes seven stages, repeated many times during the computer experiment. A computer program has been developed. It enables to investigate the coordinated operation of hydropneumatic suspensions and the influence of their parameters on the smooth running of a timber truck. Computer experiments have been carried out to overcome bumps and obstacles with given parameters at different speeds. The time dependences of the volume of the pneumatic cavity of the hydropneumatic suspension, pressure and gas temperature in it have been obtained. The influence of the average height of irregularities, the number of obstacles per unit length, the speed of timber truck on the maximum vertical acceleration of timber truck, the maximum pressure and temperature difference in the pneumatic cavity of the suspension under study has been revealed
ALLOCATION OF REPRESENTATIVE SITES OF FOREST ECOSYSTEMS WITHIN FSC CERTIFICATION
Authors: Debkov Nikita
Published: May 2020

Voluntary forest certification is a widespread mechanism of a market economy aimed at balancing economic, environmental and social interests. The article provides a methodology for identifying representative areas of forest ecosystems when forming a network of protected areas that form the ecological framework of the leased area. As an example, we took a logging company that leases two forest plots in Chebulinsky forestry of the Kemerovo region with different characteristics of the forest fund and the history of forest use. Based on the basic requirements of the current FSC forest management standard, a methodology for identifying representative sites has been developed. As a result of its application, it was found that in the area with more intensive forest management, 41% of the forest types present in the entire forestry area are found, despite its smaller area (3837 hectares). It is 21% on a larger, but less transformed and fragmented plot (5224 ha). It was revealed that the share of the frequent forest types (with the occurrence above 1%), which is 18%, is common for both leased plots. The area of representative plots is also approximately the same - 4.16 and 3.79%, respectively. It is noteworthy that frequent types of forests are already present in sufficient quantities in the network of protective forests and especially protective areas in production forests. But rare forest types, as a rule, are slightly represented in them. It enables us to conclude that it is important to form a network of representative sites in forest certification. It has been established that both coniferous and deciduous stands fall into rare forest ecosystems. The average area under allotment in the older cultivated leased plot is 8.8 hectares (with a variation from 0.8 to 55.0 hectares), and in less cultivated - 13.3 hectares (with a variation from 1.8 to 28.7 hectares), which is quite logical. However, in the first leased area, only 9%, and in the second - 6% of representative areas have an area of over 20 ha, which is accepted as a threshold in several countries
De oficio costruttore
Authors: Altuzarra César Eduardo
Published: May 2020

El objetivo del trabajo es visibilizar la prolífica producción de la empresa constructora Candia, que operó en el siglo pasado en la ciudad de Rosario. Ejecutaron obras de calidad, edificios emblemáticos para el círculo de arquitectos destacados y la burguesía empresaria local. Esta circunstancia posicionó a la empresa en un lugar de privilegio ya que su legado edilicio se constituyó en un testimonio de los debates culturales de su tiempo, cuya evolución y contradicciones quedan relatadas en su propia historia. En este caso, se aborda el período de transición entre la arquitectura académica y el movimiento moderno en la ciudad, describiendo las técnicas constructivas utilizadas registradas en el archivo documental de las obras ejecutadas por la empresa. Se relatan cronológicamente las principales obras de este período, la evolución de la empresa y el rol de sus referentes. Destacamos tres momentos característicos, el fundacional con la figura de Rafael Candia, el de expansión con Rafael Candia (h) y Armando Delannoy y el de consolidación con el Arq. Rafael Carlos Candia como referente. La empresa abordó diversos estilos y géneros arquitectónicos y operó en todos los campos de la industria de la construcción, legando un patrimonio edilicio que no debe pasar inadvertido.