Opinions versus Facts: A Bio-statistical Paradigm Shift in Oenological Research

2017 ◽  
Vol 12 (4) ◽  
pp. 354-362
Author(s):  
Dom Cicchetti
Keyword(s):  
Paradigm Shift ◽  
Scientific Research ◽  
Pinot Noir ◽  
Cabernet Sauvignon ◽  
Cabernet Franc ◽  
Diagnostic Research ◽  
Jel Classifications

AbstractA substantial oenological literature exists on opinions of experts and neophytes as they relate to opinions about the quality of wines (Ashenfelter and Quandt, 1998; Cicchetti, 2004; Lindley, 2006). These opinions can be contrasted with factual binary questions about wine: Is it oaked? Does it contain sulfites? Is it filtered? Is the grape varietal Cabernet Sauvignon or Cabernet Franc? Syrah or Grenache? Pinot Noir or Gamay? Such factual binary issues are examined within the broader context of the various measures of factual judgment: Overall Accuracy (OA), Sensitivity (Se), Specificity (Sp), Predicted Positive Accuracy (PPA), and Predicted Negative Accuracy (PNA). The resulting biostatistical methodology derives from biobehavioral diagnostic research investigations. The purpose of this report is to apply this methodology to the discipline of oenology to compare wine judgments with wine facts. Using hypothetical examples, wine judges’ classifications of wines as oaked or unoaked were analyzed for their degree of accuracy. The results show that OA is a poor measure of the accuracy of binary judgments relative to Se, Sp, PPA, or PNA. The biostatistics of the problem could have wide-ranging applications in the design of future oenological research investigations, and in scientific research more broadly. (JEL Classifications: C1, L15, Q13)

scholarly journals The Influence of Geomorphology on the Sensorial Quality of Red Wines from the Șarba Wine Region, Odobești Vineyard

2015 ◽  
Vol 49 ◽  
pp. 44-49
Author(s):  
Daniela Maria Șandru
Keyword(s):  
Point Of View ◽  
Pinot Noir ◽  
Cabernet Sauvignon ◽  
Red Wines ◽  
Sensorial Analysis ◽  
Red Grapes ◽  
Sensorial Quality ◽  
Wine Region

This study aims at making a sensorial analysis of red wines from the Șarba wine region, Odobești Vineyard. In order to determine wines from a sensory point of view, we first studied the influence of geomorphology on the sensory character. In the analysis of red wines sensorial quality we used several wines from 2012 (i.e. Pinot noir, Cabernet Sauvignon, Black Fetească and Merlot), as 2012 was a beneficial year from the point of view of red grapes ripening, and the oenoclimatic index was favourable to obtaining savoury and flavoured wines. The vegetal flavour does not affect the wines’ harmony too much.

scholarly journals THE EFFECT OF DIFFERENT TECHNIQUES OF MACERATION-FERMENTATION ON THE PHENOLIC COMPOSITION OF RED WINES

2021 ◽  
Vol 185 (1) ◽  
pp. 63-69
Author(s):  
Iulia Maria CERBU ◽  
Valeriu COTEA ◽  
Catalin Ioan ZAMFIR ◽  
Marius NICULAUA ◽  
Ioana CALIN ◽  
...  
Keyword(s):  
Red Wine ◽  
Extraction Process ◽  
Pinot Noir ◽  
Cabernet Sauvignon ◽  
Phenolic Composition ◽  
Red Wines ◽  
Process Technology ◽  
Useful Components ◽  
Grape Varieties

Grapes, the quintessential quality factor in winemaking, are found in certain areas of the globe where viticulture thrives. The quality of wine products is directly influenced by the quality of the grapes, their process technology, the care and the quality of the premises and equipment used, as well as the conditions for the storage and use of the wines. In most red wine-making processes, it is preferred that the maceration process is accompanied by the fermentation process, as increase in the alcohol content favours the intensification of the extraction process. For this reason, both processes are combined in a single technological operation known as maceration-fermentation. The largest amount of polyphenolic compounds of wine, anthocyanins and tannins comes from the solid parts of the grapes - the skins and seeds, and these have a decisive influence on the phenolic character of wines. Maceration is a fractional extraction which leads to the dissolution of the useful components of the grapes, which give the flavour, colour and taste typical of red wine. The aim of this research was to analyse the effect of different techniques of maceration fermentation on the phenolic composition of red wines obtained from Merlot, Pinot noir and Cabernet Sauvignon grape varieties in Copou-Iasi vineyard compared to red wines obtained from the same varieties in Murfaltar vineyard, located in the northeast and south of Romania, respectively. Wines obtained by maceration-fermentation in rotating tanks have higher values of the Folin-Ciocâlteu index (wines obtained from Pinot noir) in contrast to those obtained by the classical maceration-fermentation technique (wines obtained from Merlot and Cabernet Sauvignon).

scholarly journals Development of predictive models for astringency from anthocyanin, phenolic and color analyses of British Columbia red wines

OENO One ◽  
2002 ◽  
Vol 36 (1) ◽  
pp. 21 ◽  
Author(s):  
Margaret A. Cliff ◽  
N. Brau ◽  
M. C. King ◽  
Giacomo Mazza
Keyword(s):  
British Columbia ◽  
Discriminant Analysis ◽  
Total Phenolics ◽  
Pinot Noir ◽  
Cabernet Sauvignon ◽  
Red Wines ◽  
Variable Model ◽  
Cabernet Franc ◽  
Color Density ◽  
Total Anthocyanins

<p style="text-align: justify;">One-hundred and eighty-nine commercial red wines from four vintages (1996-1999), four varieties (Pinot noir, Merlot, Cabernet franc, Cabernet Sauvignon) and 13 vineyard locations within the Okanagan Valley of British Columbia were analysed for total phenolics, anthocyanins, flavonols, tartaric esters, free SO<sub>2</sub>, pH and titratable acidity, as well as copigmented-, monomeric-, polymeric- and total- anthocyanins (absorbance values). Color was evaluated using color density, hue, Hunter-color (L, a, b) and chroma values. Statistics (means, standard deviations) and discriminant analysis were used to explore the response patterns in the compositional analyses among the vintages, varieties and vineyard locations. Color density was highly correlated to the monomeric- and polymeric- anthocyanins for all varieties. Discriminant analysis revealed that some wine vintages could be differentiated using the flavonols, anthocyanins, copigmented anthocyanins, hue and L values. Phenolic concentrations were lower in 1996 and 1997 vintages compared to 1998 and 1999. Discriminant analysis showed that the varieties Pinot noir, Cabernet franc and Merlot/Cabernet Sauvignon could be differentiated using the monomeric-, polymeric- and total- anthocyanins, as well as color density, hue and L values. Cabernet Sauvignon wines formed a subset within the Merlot grouping. Discriminant of wines from the vineyard locations revealed that there was a considerable overlap among the regions, but that the groupings were generally consistent with geographic location. Sensory analysis was used to determine the intensity of astringency and astringent aftertaste in a subset of 35 wines from 1998. Multiple linear regression was used to relate the sensory and compositional analyses. A two-variable model predicted astringency (R=0.77) from total phenolics and copigmented anthocyanins; whereas, a one-variable model was developed to predict astringent aftertaste (R=0.74) from total phenolics. Sensory data collected on an additional 25 red wines were used to validate the appropriateness of the models.</p>

scholarly journals Caracterização fenológica e exigência térmica de diferentes variedades de uvas viníferas em São Joaquim, Santa Catarina - Brasil

2013 ◽  
Vol 43 (7) ◽  
pp. 1162-1167 ◽  
Author(s):  
Alberto Fontanella Brighenti ◽  
Emilio Brighenti ◽  
Valdir Bonin ◽  
Leo Rufato
Keyword(s):  
Pinot Noir ◽  
Cabernet Sauvignon ◽  
Santa Catarina ◽  
Sauvignon Blanc ◽  
Cabernet Franc

A produção de uvas viníferas nas regiões de elevada altitude do estado de Santa Catarina é recente e há poucas informações disponíveis a respeito das características fenológicas e das exigências térmicas para as variedades utilizadas. O objetivo deste trabalho foi caracterizar o comportamento fenológico e determinar as exigências térmicas das variedades Chardonnay, Sauvignon Blanc, Cabernet Sauvignon, Merlot, Pinot Noir, Cabernet Franc e Sangiovese. A área experimental foi instalada na Estação Experimental da EPAGRI, localizada em São Joaquim (28°17'39"S; 49°55'56"W, altitude 1.415m). Os estádios fenológicos avaliados foram início da brotação, floração, mudança de cor das bagas e maturidade nos ciclos produtivos de 2004/05, 2005/06 e 2006/07. A exigência térmica das variedades foi calculada empregando-se o somatório de graus-dia, considerando-se temperatura-base para a videira de 10°C. Na colheita, a maturação tecnológica foi determinada através das análises de sólidos solúveis totais, acidez titulável e pH. O ciclo das variedades viníferas avaliadas na região de São de Joaquim é mais longo do que o observado em outras regiões produtoras do Brasil. A duração térmica é um bom indicador de desenvolvimento das fases do ciclo da videira. Para as regiões com altitude acima de 1.300m, deve-se dar preferência para o plantio de variedades com ciclos entre 15 de setembro até 15 de abril.

scholarly journals EVOLUÇÃO DA COR DURANTE A MATURAÇÃO DAS UVAS TINTAS

1993 ◽  
Vol 23 (2) ◽  
pp. 227-231
Author(s):  
Gilberto Massashi Ide ◽  
Carlos Eugênio Daudt
Keyword(s):  
Vitis Vinifera ◽  
Pinot Noir ◽  
Cabernet Sauvignon ◽  
Vitis Labrusca ◽  
Cabernet Franc

Foram feitos estudos de tonalidade e intensidade de cor na película e na polpa durante o desenvolvimento e a maturação da uva das cultivares Cabernet Sauvignon, Cabernet Franc, Merlot, Pinot Noir (Vitis vinifera) e Isabel (Vitis labrusca) nas safras de 1990 e 1991. A tonalidade na película diminuiu acentuadamente no início do desenvolvimento das bagas estabilizando-se após a "veraison". As boas condições climáticas (baixa precipitação pluviométrica e umidade, alta insolação) da safra de 1991 tiveram pouca influência sobre a tonalidade. A intensidade de cor na película aumentou durante a maturação da uva e as condições climáticas de 1991 propiciaram maior intensidade nas cultivares Cabernet Sauvignon, Cabernet Franc e Merlot pouco influindo, no entanto, nas cultivares Pinot Noir e Isabel. Na polpa houve estabilidade da intensidade de cor, porém, a tonalidade apresentou-se variável com tendência a estabilizar-se durante a maturação.

Developing the culture and discipline of conducting and publishing scientific research: Guiding principles

2014 ◽  
Vol 1 ◽  
pp. 1-7
Author(s):  
Daniel Obeng-Ofori
Keyword(s):  
Developing Countries ◽  
Scientific Research ◽  
Scientific Writing ◽  
Weekly Schedule ◽  
Academic Activities ◽  
Heavy Workload ◽  
Guiding Principles ◽  
Mentoring System ◽  
Critical Constraints

The pressure to publish is a fact of life in academia. Academics are expected to demonstrate that they are active researchersand that their work has been vetted by peers and disseminated in reputable scholarly forums. In practice, however, a numberof critical constraints hamper effective publication of scientific research in most developing countries. These include lackof effective mentoring system, poor facilities and inadequate funding for effective research and heavy workload where toomuch time and effort are spent in teaching, grading, meetings and other non-academic activities. In spite of these seeminglyinsurmountable challenges, with proper planning and commitment, one can still conduct research and publish to advanceones career and exchange of knowledge. The paper discusses the critical guiding principles in scientific writing and publishingin an unfriendly research environment as pertains in most universities in the developing world. The overriding principle isto cultivate the discipline of scientific writing consciously and follow it through religiously. This could be achieved if time isallocated for scientific writing in the scheme of weekly schedule of activities and made to be functional through meticulousplanning and commitment. Equally important is to avoid procedural mistakes in scientific writing. While the quality of theresearch is the single most important factor in determining whether an article will be published, a number of proceduralmistakes can help tip the balance against its publication. It should also be noted that when a manuscript is submitted to ascholarly journal, there are two audiences to satisfy: first the editor and external reviewers, and then the journal’s readers.That first group must be satisfied to create the opportunity to appeal to the second. Thus, familiarity with the style and tone ofthe specific journal is crucial.

PROFESSORS' PERCEPTION OF SCIENTIFIC ACTIVITY IN THE FACULTY OF MEDICAL SCIENCES OF THE UNIVERSITY OF GUAYAQUIL

2020 ◽  
Vol 8 (10) ◽  
pp. 70-76
Author(s):  
Jorge Daher Nader ◽  
Amelia Patricia Panunzio ◽  
Marlene Hernández Navarro
Keyword(s):  
Scientific Research ◽  
Scientific Activity ◽  
Medical Sciences ◽  
Research Activity ◽  
University Environment ◽  
Empirical Level ◽  
Teachers And Students ◽  
Scientific Nature ◽  
The University

Research is considered a function aimed at obtaining new knowledge and its application for the solution to problems or questions of a scientific nature, The universities framed in the fulfillment of their social function have a complex task given by training a competent professional who assumes research as part of their training and who learns to ask questions that they are able to solve through scientific research.  Scientific research is an indicator of the quality of processes in the university environment, so it must be increased by virtue of the results of the work carried out by research teachers and students the objective of this work is to know the perception of the teachers of the Faculty of Medical Sciences of the University of Guayaquil about the scientific activity. Objective: to know the perception of the teachers of the Faculty of Medical Sciences of the University of Guayaquil about the scientific activity. Methods: theoretical and empirical level were used, a questionnaire with closed questions aimed at knowing the opinions on the research activity in this institution was applied. Result: that of the sample analyzed 309 (39.3%) said they agreed with the training for the writing of scientific articles. 38.6% said they agree with the training on research projects. Conclusion: that teacher’s research should be enhanced to ensure the formation and development of research skills in students.

Getting out of the Field

2017 ◽  
Author(s):  
Jeasik Cho
Keyword(s):  
Qualitative Research ◽  
Academic Research ◽  
Scientific Research ◽  
Research Community

This chapter provides a review of the book, which explores how to conceptually understand and practically evaluate the quality of qualitative research. Despite the fact that there are few scholarly pieces regarding qualitative research, the depth and creativity that the pioneering researchers have demonstrated are profound, and the extent to which they cover not only the broad quality of qualitative research but also most of the specific qualities expected by many different kinds of qualitative research is incredible. This chapter summarizes the major topics of this book. Final remarks on this exciting, creative, but difficult topic are preceded by the following summary: Fortunately, There are commonly agreed, bold standards for evaluating the goodness of qualitative research in the academic research community. These standards are a part of what is generally called “scientific research.”

The Home Visit Experience: A Medical Student’s Perspective

2007 ◽  
Vol 8 (4) ◽  
pp. 206-210 ◽  
Author(s):  
Maria Hervada-Page ◽  
Kristopher S. Fayock ◽  
Randa Sifri ◽  
Fred W. Markham
Keyword(s):  
Family Caregiving ◽  
Paradigm Shift ◽  
Learning Experience ◽  
Home Visits ◽  
School Curriculum ◽  
Controversial Issues ◽  
Treatment Access ◽  
Medicine Quality ◽  
Comparison Technique

Incorporating home care education into the medical school curriculum is essential for providing a learning experience not duplicated elsewhere. Students rotating through family medicine write a reflection paper on their experiences. The papers about home visits from July 2000 to June 2004 were analyzed by a constant comparison technique developing seven themes: student paradigm shift in their understanding of causes vs. effects of disease, misconceptions about treatment, access to care, a return to the roots of medicine, quality of family caregiving, broader implications of providing care, and controversial issues. The students’ papers demonstrate the unique environment of home visits.

scholarly journals Spectrophotometric determination of ascorbic acid in grapes with the Prussian Blue reaction

2012 ◽  
Vol 23 (2) ◽  
pp. 174-179 ◽  
Author(s):  
Nicoleta Matei ◽  
Simona Dobrinas ◽  
Gabriel Lucian Radu
Keyword(s):  
Ascorbic Acid ◽  
Vitamin C ◽  
Vitis Vinifera ◽  
Prussian Blue ◽  
Spectrophotometric Determination ◽  
Pinot Noir ◽  
Cabernet Sauvignon ◽  
Red Grapes ◽  
Blue Reaction

AbstractThe objective of the present work was to adapt the Prussian Blue reaction for the determination of ascorbic acid. The procedure was successfully applied for the determination of ascorbic acid in red and white grapes (Vitis vinifera L.) just previous ingathering. In the present work was used the red and white grapes from Murfatlar vineyard: Mamaia, Cabernet Sauvignon, Merlot, Pinot Noir, Chardonnay, Sauvignon, Muscat Ottonel and Riesling Italian. The results were situated in the range of 0.67 - 1.79 mg vitamin C/100g product for red grapes and respectively 0.50 - 1.49 mg vitamin C/100g for white grapes.

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