scholarly journals Analysis of viticultural potential and delineation of homogeneous viticultural zones in a temperate climate region of Romania

OENO One ◽  
2014 ◽  
Vol 48 (3) ◽  
pp. 145 ◽  
Author(s):  
Liviu Mihai Irimia ◽  
Cristian V. Patriche ◽  
Hervé Quénol
Keyword(s):  
Ecological Factors ◽  
Temperate Climate ◽  
Gis Analysis ◽  
Horizontal Differentiation ◽  
White Wines ◽  
Suitability Assessment ◽  
Climate Suitability ◽  
Continental Climate ◽  
Growing Region

<p style="text-align: justify;"><strong>Aims</strong> : To characterize the viticultural potential and delineate homogeneous viticultural zones in the Huşi wine growing region (Romania) in order to provide necessary information for viticultural zoning.</p><p style="text-align: justify;"><strong>Methods and results</strong>: The methodology is based on a Geographic Information System (GIS) analysis of 15 ecological parameters, representative of the topography, climate and soils in temperate continental climate vineyards. Three homogeneous viticultural zones were identified : one suitable for quality white wines and red table wines ; one suitable for quality white wines ; and one suitable for white table wines, sparkling wines and wines for distillates.</p><p style="text-align: justify;"><strong>Conclusion</strong>: In order to characterize the viticultural potential, it is necessary to assess the suitability of all ecological factors that influence the quality of the grapes. Omitting one ecological factor may lead to erroneous results in suitability assessment. Climate suitability determines altitudinal differentiation of the viticultural potential, while topographical and pedological suitability determines a horizontal differentiation.</p><p style="text-align: justify;"><strong>Significance and impact of the study</strong>: This study provides the necessary information for viticultural zoning in the Huşi wine growing region in Romania. The methodology allows to evaluate viticultural potential and to delineate homogeneous viticultural zones in wine growing regions with a temperate continental climate.</p>

scholarly journals Comparison of North Italian and South Moravian wines on the base of their antioxidant activity, phenolic composition and sensory quality

2012 ◽  
Vol 60 (8) ◽  
pp. 9-18 ◽  
Author(s):  
Mojmír Baroň ◽  
Michal Kumšta
Keyword(s):  
Sensory Quality ◽  
Phenolic Composition ◽  
White Wines ◽  
Spectrophotometric Methods ◽  
Total Anthocyanins ◽  
Health Promoting ◽  
Phenolic Substances ◽  
South Moravia ◽  
Growing Region

In the present study, antioxidant capacity, phenolic composition and sensory evaluation of selected red and white wines originating from wine-growing regions of South Moravia and North Italy (wine-growing region Trident – Alto Adige) were investigated. The sensory analysis indicated that the evaluated wine samples were very similar. As far as basic the analytical parameters were concerned, concentrations of residual sugar were significantly higher in Moravian wines. Antioxidative characteristics were estimated by means of common spectrophotometric methods (total phenols, total anthocyanins, total flavanols, DPPH and FRAP) and thereafter compared. It was found out that the compared methods were highly significantly and positively correlated as far as their results were concerned. Individual phenolic compounds were detected by means of HPLC with DAD detection. In white wines, the content of GRP products was higher and this indicated that the quality of grapes used for making Moravian wines was lower. In red Moravian wines, the content of catechins (i.e. compounds responsible for the majority of phenolic substances and considered to be health-promoting compounds) was higher. This observation was corroborated also analytically, i.e. on the base of correlation with antioxidative characteristics.

scholarly journals Viticultural Zoning: A Comparative Study Regarding the Accuracy of Different Approaches in Vineyards Climate Suitability Assessment

2013 ◽  
Vol 46 (3) ◽  
pp. 95-106 ◽  
Author(s):  
L. Irimia ◽  
C.V. Patriche ◽  
H. Quénol
Keyword(s):  
Temperate Climate ◽  
Wine Production ◽  
Southern Limit ◽  
Local Climate ◽  
Climate Conditions ◽  
Suitability Assessment ◽  
Multicriteria Method ◽  
Climate Suitability ◽  
Wine Region ◽  
Research Show

Abstract The paper presents the results of a study regarding the mesoclimate suitability assessment of three Romania’s wine-growing centres (Urlaţi-Dealu Mare vineyard, Huşi-Huşi vineyard, Bucium-Iaşi vineyard), by the Huglin’s heliothermal index and by a GIS based multicriteria method. The results are compared between the two types of analysis and with the macroclimate suitability map of Romania’s wine regions, expressed by Huglin’s heliothermal index spatial distribution. The research show that the values of Huglin’s heliothermal index in Romania’s wine regions varies between 2341.48 on the Danube Terraces from the southern limit of the country to lower than 1500 on the intramountainous wine region Transylvania. The prevailing climate class over the Romania’s wine regions is IH-1 that define temperate climate. According to the assessment on Romania’s macroclimate scale by Huglin’s heliothermal index, the three wine-growing centers are characterized by temperate climate (IH-1), that indicate the existence of climate conditions for grapes maturation to Cabernet Sauvignon variety. The assessment on mesoclimate scale by the GIS based multicriteria method reveals a wider variability of local climate than that resulted from macroclimate and mesoclimate analysis by Huglin’s heliothermal index, as follows: the climate of Urlaţi wine-growing center is suitable for quality red wines production; in Huşi wine-growing centre only 16.95% from the area has climate suitable to produce red table wines; the climate of Bucium wine-growing centre is not suitable for red wine production. Comparison with the Romania’s vineyards wine production specialization confirms that the results of multicriteria GIS based evaluation reveal accurate the local climate suitability and demonstrate the need of the fine-scale assessment of vineyard climate in the viticultural zoning.

Potential displacement of the native Tenuisvalvae notata by the invasive Cryptolaemus montrouzieri in South America suggested by differences in climate suitability

2021 ◽  
pp. 1-11
Author(s):  
Larissa F. Ferreira ◽  
Christian S. A. Silva-Torres ◽  
Jorge B. Torres ◽  
Robert C. Venette
Keyword(s):  
Biological Control ◽  
South America ◽  
Prey Availability ◽  
Ecological Factors ◽  
Growth Conditions ◽  
Cryptolaemus Montrouzieri ◽  
Seasonal Differences ◽  
Ladybird Beetle ◽  
Ecoclimatic Index ◽  
Climate Suitability

Abstract Tenuisvalvae notata (Mulsant) (Coccinellidae) is a predatory ladybird beetle native to South America. It specializes in mealybugs prey (Pseudococcidae), but relatively little is known about its ecology. In contrast, the ladybird beetle Cryptolaemus montrouzieri Mulsant (Coccinellidae) is indigenous to Australia and has been introduced to many countries worldwide including Brazil for biological control of mealybugs. The potential impacts of these introductions to native coccinellids have rarely been considered. The software CLIMEX estimated the climate suitability for both species as reflected in the Ecoclimatic Index (EI). Much of South America, Africa, and Australia can be considered climatically suitable for both species, but in most cases, the climate is considerably more favorable for C. montrouzieri than T. notata, especially in South America. The CLIMEX model also suggests seasonal differences in growth conditions (e.g. rainfall and temperature) that could affect the phenology of both species. These models suggest that few locations in South America would be expected to provide T. notata climatic refugia from C. montrouzieri. Although other ecological factors will also be important, such as prey availability, this analysis suggests a strong potential for displacement of a native coccinellid throughout most of its range as a consequence of the invasion by an alien competitor.

scholarly journals Evaluation of the Storage Conditions and Type of Cork Stopper on the Quality of Bottled White Wines

Molecules ◽  
2021 ◽  
Vol 26 (1) ◽  
pp. 232
Author(s):  
María Consuelo Díaz-Maroto ◽  
Manuel López Viñas ◽  
Lourdes Marchante ◽  
María Elena Alañón ◽  
Ignacio Javier Díaz-Maroto ◽  
...  
Keyword(s):  
Volatile Compounds ◽  
Light Exposure ◽  
Total Content ◽  
Storage Conditions ◽  
Sensory Profile ◽  
Cork Stopper ◽  
White Wines ◽  
White Leds ◽  
Retail Outlets

The effects of different storage conditions, light exposure, temperature and different commercially available cork stoppers on the phenolic, volatile and sensorial profile of Verdejo wines were studied. Two natural corks of different visual quality and a microgranulated cork stopper were investigated over one year at two different storage conditions. One simulating light exposure and temperature in retail outlets and the other simulating optimal cellar conditions (darkness and 12 °C). The wines stored under commercial conditions showed greater losses of total and free SO2 and higher levels of brown-yellowish tones, related to the oxidation of flavan-3-ols. Although these wines underwent a decrease in the total content of stilbenes, a significant increase in trans-piceid was observed. In addition, these wines suffered important changes in their volatile and sensory profile. Volatile compounds with fruity and floral aromas decreased significantly, while volatile compounds related to aged-type characters, as linalool oxides, vitispirane, TDN or furan derivatives increased. Wines stored in darkness at 12 °C underwent minor changes and their sensory profiles were similar to wine before bottling. The high-quality natural corks and microgranulated corks better preserved the quality of the white wines from a sensory point of view. These results showed that temperature and light exposure conditions (diffuse white LEDs and 24 ± 2 °C) in retail outlets considerably decrease the quality of bottled white wines and, consequently, their shelf life, due to the premature development of aged-type characters.

Influence of Production Method on the Chemical Composition, Foaming Properties, and Quality of Australian Carbonated and Sparkling White Wines

2017 ◽  
Vol 65 (7) ◽  
pp. 1378-1386 ◽  
Author(s):  
Julie A. Culbert ◽  
Jacqui M. McRae ◽  
Bruna C. Condé ◽  
Leigh M. Schmidtke ◽  
Emily L. Nicholson ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Production Method ◽  
Foaming Properties ◽  
White Wines

Research of the energy efficiency of a combined air and water heating of a public building

2021 ◽  
Vol 14 (2) ◽  
pp. 124-131
Author(s):  
K. A. Ignatiev ◽  
E. R. Giniyatullin ◽  
M. G. Ziganshin
Keyword(s):  
Energy Efficiency ◽  
Indoor Air ◽  
Energy Efficient ◽  
Heating System ◽  
Temperate Climate ◽  
Water Heating ◽  
Efficient Control ◽  
Temperature And Humidity ◽  
Academic Building ◽  
Continental Climate

Combined air and water heating schemes have been actively used recently for heating public and residential premises. They have certain advantages in countries with a warm climate, whereas in a temperate climate, their use may be unfeasible. The most effective regulation of the heating system in the building can be expected, if all the technology specifics are taken into account, in terms of both the purpose of the room and the methods of regulation. A system focused only on weather-based regulation falls short of meeting to energy-efficient control classes: a heat carrier with the same temperature is distributed among rooms with different requirements for temperature and humidity characteristics. The issues of ensuring the energy efficiency of the combined air and water heating system in public buildings for the temperate continental climate of Russia — the academic building (AB) and laboratory building (LB) of the Kazan State Energy University (KSEU) have been considered. Heating devices of the KSEU heating system have manual control valves installed in the premises, or radiator valves with thermostatic heads, but without room controllers, which does not meet the energy-efficient control classes. An experimental survey of the functioning of the heating system of the KSEU buildings during the 2019 – 2020 and 2020 – 2021 heating seasons was conducted. The optical pyrometry method was used to measure the temperature of the surfaces of windows, walls and elements of the heating system, as well as the temperature and humidity of the air in lecture rooms and corridors of the AB and LB of the KSEU. The parameters of heating devices and indoor air in rooms of various purposes were found compliant with the current sanitary and hygienic requirements. At the same time, the need to switch to a higher class of regulation has been revealed, since, under the current situation, the parameters of the indoor air depend on the outdoor temperature: in the abnormally warm winter of 2020, the indoor air temperature was at the edge of the maximum permissible value, while in the normal climate of winter of 2021, it was at the edge of the minimum permissible value.

Ecological correlates of folivore abundance in north Queensland rainforests

2001 ◽  
Vol 28 (1) ◽  
pp. 1 ◽  
Author(s):  
John Kanowski ◽  
M. S. Hopkins ◽  
Helene Marsh ◽  
J. W. Winter
Keyword(s):  
Nutritional Quality ◽  
Host Plants ◽  
Inverse Relationship ◽  
Ecological Factors ◽  
Habitat Destruction ◽  
Metamorphic Rocks ◽  
Northern Australia ◽  
Altitudinal Variation ◽  
Foliage Quality

The ecological factors controlling the distribution and abundance of the folivorous marsupials endemic to the rainforests of northern Australia are not understood. In this study, we surveyed folivore abundance at 40 sites stratified by altitude and geology in rainforests of the Atherton Tableland, north Queensland. All five species of folivore that inhabit the study area were more abundant in highland (800–1200 m) than in upland (400–800 m) forests. Allowing for the effects of altitude, four species of folivore were more abundant in forests on nutrient-rich basalts than in forests on nutrient-poor acid igneous or metamorphic rocks. The abundance of two folivore species also varied inversely with rainfall. Altitudinal variation in folivore abundance in the study area has been attributed to habitat destruction, Aboriginal hunting, the distribution of host plants and climate; however, none of these hypotheses has been tested. Variation in folivore abundance with geology is plausibly explained as a response to the nutritional quality of foliage. Foliage quality may also explain the inverse relationship between two of the folivores and rainfall. The results of this study show that only a relatively small proportion of north Queensland rainforests support abundant populations of the endemic folivorous marsupials.

scholarly journals Comparison of a Rapid Light-Induced and Forced Test to Study the Oxidative Stability of White Wines

Molecules ◽  
2022 ◽  
Vol 27 (1) ◽  
pp. 326
Author(s):  
Emilio Celotti ◽  
Georgios Lazaridis ◽  
Jakob Figelj ◽  
Yuri Scutaru ◽  
Andrea Natolino
Keyword(s):  
Oxidative Stability ◽  
Oxidation Stability ◽  
White Wine ◽  
Sensorial Analysis ◽  
White Wines ◽  
Technological Interventions ◽  
Prototype Instrument ◽  
Fast Decision ◽  
Effect Of Light

The oxidation processes of white wines can occur during storage and commercialization due to several factors, and these can negatively affect the color, aroma, and quality of the wine. Wineries should have faster and simpler methods that provide valuable information on oxidation stability of wines and allow fast decision-making procedures, able to trigger suitable technological interventions. Using a portable prototype instrument for light irradiations at different wavelengths and times was considered and evaluated on sensorial, spectrophotometric, and colorimetric parameters of white wines. The sensorial analysis revealed that white and light blue were the most significant, after only 1 h of irradiation. The experimental results showed that hydrogen peroxide could enhance the effect of light treatment, allowing a contemporary evaluation of the oxidation stability of wine against light and chemical stresses. As expected, a good correlation (R2 > 0.89) between optical density at 420 nm and b* parameter was highlighted. The synergic effect of light and H2O2 was also studied on the hydrolyzable and condensed tannins’ additions to white wine. The proposed methodology could be used to evaluate the oxidative stability of white wines, but also to evaluate the effect of some oenological adjuvants on wine stability.

scholarly journals Wine preferences based on intrinsic attributes: A tasting experiment in Alto Adige/Südtirol province

2021 ◽  
pp. 129-134
Author(s):  
Luigi Fabbris ◽  
Alfonso Piscitelli
Keyword(s):  
Food Product ◽  
Fractional Factorial ◽  
Region Of Origin ◽  
Double Blind ◽  
White Wines ◽  
Grape Varieties ◽  
The Impact ◽  
Administration Procedure ◽  
Selection Of

Different methods have been developed by researchers in modelling wine consumers purchase behaviour. The quality of a food product is described by a set of characteristics ascribable to the intrinsic and extrinsic product attributes (Olson and Jacoby, 1972). Price, brand, region of origin, grapes and gained awards are the key extrinsic attributes and physical characteristics of the wine such as taste and flavour are intrinsic attributes. This paper addresses the problem of measuring the intrinsic attributes that characterise the wine, based on specific characteristics and the impact on consumers in terms of preferences. To this end, a fractional factorial experiment held on a selection of white wines of the Alto Adige/Südtirol province in Italy. The sensorial experiment involved a voluntary sample of 33 mild wine consumers and concerned 6 grape varieties typical of that territory. For each variety, two producing cellars were selected for a total of 12 evaluated wines. The experiment followed a double-blind administration procedure to the sample and a paper questionnaire was used to elicit the consumers’ opinions on the tasted wines. The results show that intrinsic attributes, such as taste-olfactory intensity, harmony and olfactory complexity, are the drivers used in combination by consumers to rank wines in order of preference.

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