scholarly journals Physico-Chemical and Sensory Characterization of a Fruit Beer Obtained with the Addition of Cv. Lambrusco Grapes Must

Beverages ◽  
2021 ◽  
Vol 7 (2) ◽  
pp. 34
Author(s):  
Antonio Castro Marin ◽  
Federico Baris ◽  
Elia Romanini ◽  
Milena Lambri ◽  
Giuseppe Montevecchi ◽  
...  
Keyword(s):  
Point Of View ◽  
Certification Program ◽  
Sensory Panel ◽  
Grape Must ◽  
Red Grapes ◽  
Physico Chemical ◽  
Brewing Process ◽  
Red Grape ◽  
The Impact

In 2015, Italian Grape Ale (IGA) beers have been included as a new provisional sub-category of special-type fruit beers by the Beer Judge Certification Program, including those products whose brewing process is carried out in presence of determined quantities of grape must. However, information on the effects of these additions on the composition of final beers are still scarce. This work is hence focused on the chromatic, volatile, phenolic and sensory characterization of IGA beers obtained with the addition of grape musts during brewing process. To this aim, different amounts of must (5, 10 and 20%) from cv. Lambrusco red grapes were added to a lager wort before primary fermentation. Beers were then characterized by HPLC-MS, GC-MS and sensory analysis in order to determine phenolic and aroma compounds along with their sensory attributes. Results confirmed the addition of must from cv. Lambrusco grapes capable to enrich beers in color, acids, phenolic (up to 7-folded increased) and volatile compounds, while giving complexity to beers. These results, which were confirmed by a trained sensory panel, are among the very first insights on the impact of red grape must in brewing, both from a compositional and sensory point of view.

The Analyses of Learning Strategies in English as a Second Language: Theoretical Classification and Measurement Test

2020 ◽  
Vol 4 (2) ◽  
pp. 118-129
Author(s):  
Asti Gumartifa ◽  
◽  
Indah Windra Dwie Agustiani
Keyword(s):  
Language Learning ◽  
Learning Outcomes ◽  
Learning Strategies ◽  
Learning Process ◽  
English Learners ◽  
English Language ◽  
Point Of View ◽  
Effective Learning ◽  
The Impact

Gaining English language learning effectively has been discussed all years long. Similarly, Learners have various troubles outcomes in the learning process. Creating a joyful and comfortable situation must be considered by learners. Thus, the implementation of effective learning strategies is certainly necessary for English learners. This descriptive study has two purposes: first, to introduce the classification and characterization of learning strategies such as; memory, cognitive, metacognitive, compensation, social, and affective strategies that are used by learners in the classroom and second, it provides some questionnaires item based on Strategy of Inventory for Language Learning (SILL) version 5.0 that can be used to examine the frequency of students’ learning strategies in the learning process. The summary of this study explains and discusses the researchers’ point of view on the impact of learning outcomes by learning strategies used. Finally, utilizing appropriate learning strategies are certainly beneficial for both teachers and learners to achieve the learning target effectively.

scholarly journals Synthesis and Characterization of Some Ester-type Biolubricants of Soiabean Fatty Acids

2017 ◽  
Vol 54 (2) ◽  
pp. 386-389 ◽  
Author(s):  
Sorina Boran ◽  
Sabina Nitu
Keyword(s):  
Fatty Acids ◽  
Point Of View ◽  
Synthesis And Characterization ◽  
Synthetic Ester ◽  
Microwave Reactor ◽  
Tribotechnical Properties ◽  
Physico Chemical ◽  
Hydroxyl Compounds ◽  
Structural Point

Growing demands from industry for the use of eco-friendly lubricants led research towards finding environmentally friendly products with superior lubricating characteristics. Vegetable oils and synthetic ester oils are competitive base oils used to obtain lubricants with good physico-chemical, rheological and tribotechnical properties, biodegradable lubricants without negative environmental impacts. In this study we aimed the synthesis and characterization of bioesters with lubricant properties, using as acid component the soybean oil fatty acids in conjunction with the following hydroxyl compounds n-buthanol (P1) and 1,2-propilenglycole (P2), respectively. These complex esters were synthesized in a microwave reactor in a single stage in the presence of the catalyst at the reflux temperature. Characterization was carried out in the respective of structural point of view and as a lubricant.

scholarly journals CHARACTERIZATION OF POMEGRANATE CULTIVARS IN PALM GROVES OF THE OUED RIGH VALLEY (SOUTH-EASTERN ALGERIA)

2020 ◽  
Vol 53 (1) ◽  
pp. 84-93
Author(s):  
A. ALLAM ◽  
M. TAMA
Keyword(s):  
Plant Material ◽  
Plant Genetic Resources ◽  
Point Of View ◽  
Morphological Description ◽  
Chemical Analyses ◽  
Morphological Descriptors ◽  
Fruit Species ◽  
Physico Chemical ◽  
Eastern Algeria

Varietal recognition is a key step for good management of genetic diversity. Indeed, the morphological description of certain organs, such as the leaves, flowers, fruits and seeds, allow a more or less rapid and reliable identification of the varieties or cultivars. The culture of the pomegranate tree is very known in the valley of Oued Righ in the Algerian Southern, and it constitutes the main fruit species with a number of trees of 27.77 % of total number. The pomegranate tree is found in more than 84% of the farms of the region and its production is complementary of that of the dates. Unfortunately, no study has been realized on the characterization and the valorization of this species. To know and identify the varieties or the existing cultivars, we have undertaken a work of characterization of clones cultivated in the valley of Oued Righ. The plant material constituted by 13 clones of pomegranate tree stemming from various farms. The method of work consists in taking 20 fruits by tree for physico-chemical analyses in the laboratory. The results of analyses on sample of 13 clones described five cultivars, among which some present acceptable characters of fruit from a caliber point of view, contents in sugars and acidity. It shows that the naming of cultivars by the farmers based only on the acid taste of fruits "Hamad" or sweetened "Hlou" is not scientific and remain insufficient. Our results confirm the usefulness of morphological descriptors in the characterization of plant genetic resources. However, more clarification can be achieved by the undeniable contribution of molecular markers.

Strength and Swelling Properties of Solidified Dredged Materials

2011 ◽  
Vol 261-263 ◽  
pp. 812-815
Author(s):  
Dong Xing Wang ◽  
Rachid Zentar ◽  
Nor Edine Abriak
Keyword(s):  
Road Construction ◽  
Treatment Method ◽  
Point Of View ◽  
Engineering Properties ◽  
Swelling Properties ◽  
The Road ◽  
New Material ◽  
Traditional Approaches ◽  
The Impact

In the context of sustainable development, traditional approaches such as ocean dumping and inland deposit are unsatisfactory for managing such large quantity of dredged marine sediments. The solidified sediments with cement as a new material for road construction are preferred to resolve the present issue for minimizing the impact to environment. Based on the basal characterization of dredged sediments, a series of tests, such as compaction tests, compressive strength and tensile strength tests and swell tests, are performed to explore the engineering properties of treated materials. The compressive and tensile strengths increase with cement content and curing time, while the swell percents of sediments decrease after immersion in water for 4 days. And this treatment method could be considered adaptive and acceptable for the road construction from the point of view of swelling property. Finally, the I-CBR index of cement-treated sediments increases due to the flocculation and cementation compared to the I-CBR index before immersion.

scholarly journals Comparison of the In Vitro and Ex Vivo Permeation of Existing Topical Formulations Used in the Treatment of Facial Angiofibroma and Characterization of the Variations Observed

Pharmaceutics ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 1060
Author(s):  
Guillaume Le Guyader ◽  
Bernard Do ◽  
Victoire Vieillard ◽  
Karine Andrieux ◽  
Muriel Paul
Keyword(s):  
Ex Vivo ◽  
Thermodynamic Activity ◽  
Physico Chemical ◽  
Ex Vivo Permeation ◽  
Franz Cells ◽  
Great Heterogeneity ◽  
The Impact ◽  
First Time

Rapamycin has been used topically to treat facial angiofibromas associated with tuberous sclerosis for more than a decade. In the absence of a commercial form, a large number of formulations have been clinically tested. However, given the great heterogeneity of these studies, particularly with regard to the response criteria, it was difficult to know the impact and thus to compare the relevance of the formulations used. The objective of this work was therefore to evaluate the link between the diffusion of rapamycin and the physico-chemical characteristics of these different formulations on Strat-M® membranes as well as on human skin using Franz cells. Our results underline the importance of the type of vehicle used (hydrogel > cream > lipophilic ointment), the soluble state of rapamycin and its concentration close to saturation to ensure maximum thermodynamic activity. Thus, this is the first time that a comparative study of the different rapamycin formulations identified in the literature for the management of facial angiofibromas has been carried out using a pharmaceutical and biopharmaceutical approach. It highlights the important parameters to be considered in the development and optimization of topical rapamycin formulations with regard to cutaneous absorption for clinical efficacy.

scholarly journals LOS INCENDIOS FORESTALES EN EL PERÚ: GRAVE PROBLEMA POR RESOLVER

FLORESTA ◽  
2004 ◽  
Vol 34 (2) ◽  
Author(s):  
Maria Isabel Manta Nolasco ◽  
H. León
Keyword(s):  
Decision Making ◽  
Environmental Policy ◽  
Natural Resources ◽  
Forest Fire ◽  
Forest Fires ◽  
Point Of View ◽  
Burned Area ◽  
Toma De Decisiones ◽  
The Impact

El estudio de los incendios forestales en el Perú fue realizado sobre el área nacional, que abarca una superficie de 1´285,215 km2, para el periodo comprendido entre el año 1973 y el año 2000. El objetivo de la investigación fue caracterizar el problema de los incendios forestales peruanos a través de la descripción del ambiente donde se desarrollan los incendios forestales, del impacto de los incendios forestales sobre la población y los recursos naturales, de las estadísticas del área afectada y del número de incendios forestales y de la organización actual para el manejo de los incendios forestales. El análisis del problema permitió diagnosticar un conjunto de factores biofísicos, dificultades y deficiencias en la política ambiental actual, desde el punto de vista de su uso como elementos de toma de decisiones que contribuyan a reducir la gravedad de los incendios forestales en el país. FOREST FIRES IN PERU: A BIG PROBLEM FOR SOLVING Abstract The study of the forest fires in Peru was carried out over the national territory, that amounts in total an area of 1´285,215 km2, for the period 1973- 2000. The goal of the research was the characterization of the forest fire issue in Peru. To do that a set of different criteria were used, namely: the description of the forest fires environment features, the assessment of the impact of fires on the population and natural resources, the forest fires statistics concerning the total number of fires and total burned area and the current organization for forest fires management. The analysis of this problem made possible to diagnose a set of byophisic factors, difficulties and drawbacks in the current environmental policy, from the point of view of their use as decision-making elements that contribute to reduce the current importance of the forest fires problem in the country.

scholarly journals The Bad and the Good—Microorganisms in Cultural Heritage Environments—An Update on Biodeterioration and Biotreatment Approaches

Materials ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 177
Author(s):  
Adam Pyzik ◽  
Karol Ciuchcinski ◽  
Mikolaj Dziurzynski ◽  
Lukasz Dziewit
Keyword(s):  
Cultural Heritage ◽  
Chemical Characterization ◽  
Physico Chemical ◽  
Mechanical Methods ◽  
Diverse Environment ◽  
Historical Objects ◽  
Bacteria And Fungi ◽  
Cultural Heritage Objects ◽  
The Impact

Cultural heritage objects constitute a very diverse environment, inhabited by various bacteria and fungi. The impact of these microorganisms on the degradation of artworks is undeniable, but at the same time, some of them may be applied for the efficient biotreatment of cultural heritage assets. Interventions with microorganisms have been proven to be useful in restoration of artworks, when classical chemical and mechanical methods fail or produce poor or short-term effects. The path to understanding the impact of microbes on historical objects relies mostly on multidisciplinary approaches, combining novel meta-omic technologies with classical cultivation experiments, and physico-chemical characterization of artworks. In particular, the development of metabolomic- and metatranscriptomic-based analyses associated with metagenomic studies may significantly increase our understanding of the microbial processes occurring on different materials and under various environmental conditions. Moreover, the progress in environmental microbiology and biotechnology may enable more effective application of microorganisms in the biotreatment of historical objects, creating an alternative to highly invasive chemical and mechanical methods.

Characterization and Comparative Study of Pseudo-Elastic Cu-Zn-Al Foams Synthesized by Two Different Methods

2013 ◽  
Vol 738-739 ◽  
pp. 172-176 ◽  
Author(s):  
Brenda A. Weiss ◽  
Pierre Arneodo Larochette ◽  
Graciela Bertolino ◽  
Enrique M. Castrodeza ◽  
Alberto Baruj ◽  
...  
Keyword(s):  
Low Cost ◽  
Synthesis Method ◽  
Point Of View ◽  
Physico Chemical ◽  
Structural Applications ◽  
Preparation Techniques ◽  
Sio2 Spheres ◽  
Al Foams

Low cost Cu-Zn-Al foams present, in specific composition ranges, good pseudoelastic properties associated with interesting damping capacities, which establish these materials as attractive from the point of view of structural applications. These foams are manufactured by infiltration of small SiO2 spheres into the molten alloys. After alloy solidification the SiO2 spheres are removed by immersing the material in a solution of aqueous hydrofluoric acid. In this work, we have investigated the effect of two different foam preparation techniques: inductive and resistive melting. The paper details both the physico-chemical and mechanical characterization of the foams synthesized with the two different methods. The purpose of this study is to determine the quality of each synthesis method in order to identify the best alternative.

Detection of Malicious Spatial-Domain Steganography Over Noisy Channels

2021 ◽  
pp. 125-145
Author(s):  
Swaroop Shankar Prasad ◽  
Ofer Hadar ◽  
Ilia Polian
Keyword(s):  
Gaussian Noise ◽  
Spatial Domain ◽  
Point Of View ◽  
Image Steganography ◽  
Noisy Channels ◽  
Channel Parameters ◽  
The Impact ◽  
The Relationship ◽  
Special Case

Steganographic channels can be abused for malicious purposes, thus raising the need to detect malicious embedded steganographic information (steganalysis). This chapter will cover the little-studied problem of steganography and steganalysis over a noisy channel, providing a detailed modeling for the special case of spatial-domain image steganography. It will approach these issues from both a theoretical and a practical point of view. After a description of spatial-domain image steganography, the impact of Gaussian noise and packet loss on the steganographic channel will be discussed. Characterization of the substitution-insertion-deletion (SID) channel parameters will be performed through experiments on a large number of images from the ALASKA database. Finally, a steganalysis technique for error-affected spatial-domain image steganography using a convolutional neural network (CNN) will be introduced, studying the relationship between different types and levels of distortions and the accuracy of malicious image detection.

Physico-chemical and Bacteriological Characterization of the Soil Types from Various Altitudinal Vegetation Zones in Par�ng Mountains

2008 ◽  
Vol 59 (9) ◽  
pp. 1057-1061
Author(s):  
Rahela Carpa ◽  
Vasile-Daniel Gherman ◽  
Mihail Dr�gan-Bularda ◽  
Marilena Motoc ◽  
Elena Ana Pauncu
Keyword(s):  
Nitrogen Content ◽  
Soil Samples ◽  
Point Of View ◽  
Chemical Analyses ◽  
Ecological Significance ◽  
Vegetation Zones ◽  
Bacterial Indicator ◽  
Physico Chemical ◽  
Normal Nitrogen

There were collected soil samples from various vegetation sites and altitudinal vegetation zones of the Par�ng Mountains, from the South-Eastern part of the Hunedoara county, and they were analysed from the physico-chemical and bacteriological point of view. The chemical analyses consisted in the appreciation of the reaction of the soil (pH), in establishing the humus and total nitrogen content. According to these analyses, the soil is generally acid and presents normal nitrogen content. In order to establish the soil type and classes existing in the Par�ng Mountain, the chemical analyses were completed with physical analyses of the soil texture sampled from various altitudinal zones, determining the following soil classes: the Umbrisol Class, the Spodisol Class, the Cambisol Class and the Protisol Class. The bacteriological analyses consisted in the study of the abundance, of the dynamics, diversity and ecological significance on the groups of bacteria involved in the biogeochemical cycles of nitrogen (aerobic mesophilic heterotrophs, ammonifiers, denitrifiers, nitrate bacteria and nitrite bacteria and aerobic, free, nitrogen fixing-bacteria from Azotobacter genus) from the mountainous soils. Based on the obtained results there was also calculated the bacterial indicator of the soils biological quality (BISQ) for each type of soil in each altitudinal vegetation zones.

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