scholarly journals Recycling and Conversion of Yeasts into Organic Nitrogen Sources for Wine Fermentation: Effects on Molecular and Sensory Attributes

Fermentation ◽  
2021 ◽  
Vol 7 (4) ◽  
pp. 313
Author(s):  
Paula Rojas ◽  
Daniel Lopez ◽  
Francisco Ibañez ◽  
Camila Urbina ◽  
Wendy Franco ◽  
...  
Keyword(s):  
Organic Nitrogen ◽  
Protein Hydrolysate ◽  
Principal Component ◽  
Nitrogen Sources ◽  
Isoamyl Alcohol ◽  
Positive Influence ◽  
Higher Alcohols ◽  
Fermentation Performance ◽  
High Concentrations ◽  
Significant Positive Influence

Organic nitrogen plays a significant role in the fermentation performance and production of esters and higher alcohols. This study assessed the use of yeast protein hydrolysate (YPH) as a nitrogen source for grape must fermentation. In this study, we prepared an enzymatic protein hydrolysate using yeasts recovered from a previous fermentation of wine. Three treatments were performed. DAP supplementation was used as a control, while two YPH treatments were used. Low (LDH) and high degrees of hydrolysis (HDH), 3.5% and 10%, respectively, were chosen. Gas chromatography and principal component analysis indicated a significant positive influence of YPH-supplementations on the production of esters and higher alcohols. Significantly high concentrations of 3-methyl-1-penthanol, isoamyl alcohol, isobutanol, and 2-phenylethanol were observed. Significant odorant activity was obtained for 3-methyl-1-pentanol and ethyl-2-hexenoate. The use of YPH as nitrogen supplementation is justified as a recycling yeasts technique by the increase in volatile compounds.

Parametric Effects of the Performance of Nanofiltration Membrane

2012 ◽  
Vol 248 ◽  
pp. 31-36
Author(s):  
Ayo Samuel Afolabi ◽  
Kazeem Oladele Sanusi ◽  
Ambali Saka Abdulkareem ◽  
Jaafar Bux Mohamed
Keyword(s):  
Membrane Filtration ◽  
Applied Pressure ◽  
Positive Influence ◽  
Excessive Force ◽  
Test Rig ◽  
Parametric Effects ◽  
Pressure Concentration ◽  
High Concentrations ◽  
Feed Temperature ◽  
Significant Positive Influence

The effects of pressure, concentration and feed temperature using a high pressure membrane filtration test rig capable of handling nanofiltration and reverse osmosis separation was investigated. The experimental results indicated that the applied pressure across the membrane has a significant positive influence on the flux produced and increasing the pressure will rupture the membrane if excessive force or pressure is applied. The high concentrations of solutes/molecules inhibit the flow of fluid through the membrane consequently lower fluxes and improved separation is and subsequently all variables, including their interactions, examined was found to be significant.

Environmental impact of heated mining waters on clitellate (Annelida: Clitellata) assemblages

Biologia ◽  
2014 ◽  
Vol 69 (9) ◽  
Author(s):  
Sylvie Růžičková ◽  
Jana Schenková ◽  
Veronika Weissová ◽  
Jan Helešic
Keyword(s):  
Environmental Pollution ◽  
Principal Component ◽  
Positive Influence ◽  
Negative Effects ◽  
Taxa Richness ◽  
Quick Recovery ◽  
Mining Effluent ◽  
Natural Stream ◽  
High Concentrations ◽  
Mining Water

AbstractMining is a relatively highly monitored industry. While chemical pollutants (toxic ions, radionuclides, etc.) have mostly been eliminated from mining waters, other types of environmental pollution (temperature regime alterations, high concentrations of various anions, etc.) can affect benthic invertebrates. In this study, we focused on the effect of mining water effluent on the diversity and density of aquatic Clitellata. Four sampling sites were selected. Three sites in a natural stream (the Nedvědička River, Czech Republic), one upstream and two downstream from the mining effluent, and one site on the mining waters were sampled monthly during 2008–2009. Environmental variables were recorded in and samples were collected from two types of habitats — riffles and pools. The response of clitellate assemblages was evaluated using principal component analysis and generalised estimating equations. The results indicated that the mining effluent caused partial species exchange and had negative effects on clitellate taxa richness and abundance. These responses were specific to both the habitat (riffle/pool) and species sampled. In each of the different taxa studied, we observed one of four typical clitellate responses: (a) elimination of stenotherm species; (b) reduction of clitellate species followed by quick recovery; (c) neutral response; or (d) positive influence. We found that aquatic clitellates, which are considered to be eurytopic with broad ecological valences, are also sensitive to even slight environmental pollution.

A biometric study of higher alcohol production in Saccharomyces cerevisiae

1990 ◽  
Vol 36 (1) ◽  
pp. 61-64 ◽  
Author(s):  
Paolo Giudici ◽  
Patrizia Romano ◽  
Carlo Zambonelli
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Key Words ◽  
Isoamyl Alcohol ◽  
Higher Alcohols ◽  
Methionine Biosynthesis ◽  
Higher Alcohol ◽  
Strain Characteristic ◽  
Alcohol Production ◽  
Flocculation Ability ◽  
Individual Strain

A hundred strains of Saccharomyces cerevisiae were examined for the ability to produce higher alcohols. In the strains tested the production of higher alcohols was found to be an individual strain characteristic and, as such, was statistically significant. The characteristics of the strains used (flocculation ability, foaming ability, killer character, and non-H2S production) were found to be uncorrelated to isobutanol and isoamyl alcohol production, whereas the production of high levels of n-propanol was found to be related to inability to produce H2S. This, in turn, suggests a link to methionine biosynthesis. Key words: Saccharomyces cerevisiae, higher alcohols, biometry, H2S production.

scholarly journals Evaluation of Biochemical Juice Attributes and Color-Related Traits in Muscadine Grape Population

Foods ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 1101
Author(s):  
Jiovan Campbell ◽  
Ali Sarkhosh ◽  
Fariborz Habibi ◽  
Pranavkumar Gajjar ◽  
Ahmed Ismail ◽  
...  
Keyword(s):  
Principal Component ◽  
Titratable Acidity ◽  
Positive Influence ◽  
Biochemical Properties ◽  
Soluble Solids ◽  
Matrix Analysis ◽  
Anthocyanin Content ◽  
Total Anthocyanin ◽  
Color Characteristics ◽  
Muscadine Grape

Biochemical juice attributes and color-related traits of muscadine grape genotypes have been investigated. For this study, 90 muscadine genotypes, including 21 standard cultivars, 60 breeding lines, and 9 Vitis x Muscadinia hybrids (VM), were evaluated. The biochemical properties of total soluble solids (TSS), titratable acidity, and TSS/Acid (T/A) ratio showed modest diversity among genotypes with a range of 10.3 °Brix, 2.1 mg tartaric acid/L, and 4.6, respectively. Nonetheless, the pH trait exhibited a tight range of 0.74 among the population with a minimum and maximum pH of 3.11 ± 0.12 and 3.85 ± 0.12. Color-related traits showed more deviation between individuals. Total anthocyanin content (TAC), luminosity index (L*), hue angle (h°), and chroma index (C*) displayed a range of 398 µg/g DW, 33.2, 352.1, and 24, respectively. The hierarchical clustering map classified the population into two large groups of colored and non-colored grapes based on L* and h°, suggesting the predominance of these two characters among the population. The colored berries genotypes clade was further divided into several sub-clades depending on C*, TAC, and TSS levels. The principal component analysis (PCA) separated the four-color characteristics into two groups with a negative correlation between them, L* and C* versus TAC and h°. Further, PCA suggested the positive influence of acidity in enhancing the different nutraceutical components. Despite the nature of anthocyanins as a member of phenolic compounds, a lack of significant correlation between TAC and nutraceutical-related traits was detected. The dissimilatory matrix analysis highlighted the muscadine individuals C11-2-2, E16-9-1, O21-13-1, and Noble as particular genotypes among the population due to enhanced color characteristics.

scholarly journals Sustainable Competitive Advantage through Entrepreneurship, Market-Oriented Culture, and Trust

2021 ◽  
Vol 13 (7) ◽  
pp. 3986
Author(s):  
Jun-Chul Ha ◽  
Jun-Woo Lee ◽  
Jee Young Seong
Keyword(s):  
Work Engagement ◽  
Risk Taking ◽  
Choice Theory ◽  
Business Environment ◽  
Positive Influence ◽  
Mediating Effect ◽  
Sustainable Competitive Advantage ◽  
The Relationship ◽  
Positive Effect ◽  
Significant Positive Influence

In a rapidly changing business environment, the entrepreneurship of top management is essential for the survival and sustainable development of the enterprise. Building on the view of the strategic choice theory, this study identifies the relationship between entrepreneurship, market-oriented culture, and work engagement. Data were collected from 493 employees regularly working in small and medium-sized firms in South Korea. The results of this study indicate: (1) entrepreneurship (consisting of innovation, proactiveness, and risk-taking) has a significant positive influence on market-oriented culture, (2) entrepreneurship positively affects work engagement, (3) market-oriented culture has a significant positive effect on work engagement, (4) the effects of innovation and proactiveness on work engagement are significant, controlling for market-oriented culture, showing the partial mediating effect of market-oriented culture on work engagement, and (5) CEO trust moderates the relationship between risk-taking and work engagement. Theoretical and practical implications are suggested.

The Effect of Face Consciousness on Consumption of Counterfeit Luxury Goods

2014 ◽  
Vol 42 (6) ◽  
pp. 1007-1014 ◽  
Author(s):  
Yun-Qing Chen ◽  
Hong Zhu ◽  
Meng Le ◽  
Yi-Zhen Wu
Keyword(s):  
Purchase Intention ◽  
Laboratory Experiments ◽  
Positive Influence ◽  
Luxury Goods ◽  
Intention To Purchase ◽  
Luxury Item ◽  
Moderating Role ◽  
Chinese Undergraduates ◽  
Significant Positive Influence

We conducted 3 laboratory experiments to determine how face consciousness influences consumption of counterfeit luxury goods, along with the moderating roles of usage occasion and brand prominence. The participants in the first study were 138 Chinese undergraduates who were allocated to a 2 × 2 design to evaluate their intention to purchase a counterfeit luxury item that would be used either in public or in private. In Studies 2 and 3, using two 2 × 2 designs we evaluated the purchase intention of the participants (132 and 136, respectively) in order to investigate the moderating role of brand prominence. The results showed that participants' face consciousness had a significant positive influence on intention to purchase counterfeit luxury goods. In addition, the products' usage occasion and brand prominence positively moderated the influence that face consciousness had on counterfeit luxury item purchase intention of our participant groups.

Mutation of GOGAT prevents pea bacteroid formation and N2 fixation by globally downregulating transport of organic nitrogen sources

2011 ◽  
Vol 80 (1) ◽  
pp. 149-167 ◽  
Author(s):  
G. Mulley ◽  
J. P. White ◽  
R. Karunakaran ◽  
J. Prell ◽  
A. Bourdes ◽  
...  
Keyword(s):  
N2 Fixation ◽  
Organic Nitrogen ◽  
Nitrogen Sources

Piper nigrum Oil – Determination of Selected Terpenes for Quality Evaluation

Planta Medica ◽  
2018 ◽  
Vol 85 (03) ◽  
pp. 185-194 ◽  
Author(s):  
Mei Wang ◽  
Amar Chittiboyina ◽  
Jon Parcher ◽  
Zulfiqar Ali ◽  
Paul Ford ◽  
...  
Keyword(s):  
Quality Evaluation ◽  
Geographical Location ◽  
Chemical Characterization ◽  
Principal Component ◽  
Cost Effective ◽  
Black Pepper ◽  
Piper Nigrum ◽  
Ms Analysis ◽  
Chemical Profiles ◽  
High Concentrations

AbstractThe growing demand and commercial value of black pepper (Piper nigrum) has resulted in considerable interest in developing suitable and cost-effective methods for chemical characterization and quality evaluation purposes. In the current study, an extensive set of oil samples (n = 23) that were extracted by steam distillation from black pepper seeds was investigated to compare the chemical profiles of samples originating from nine major producing countries, as well as to identify potential chemical markers for quality evaluation. The twenty-two most abundant volatile compounds, mainly terpenes, in these oils were determined by conventional GC/MS analysis. Principal component analysis with this set of data revealed distinct clusters for samples that originated from China and Malaysia. Relatively low concentrations of sabinene (< 0.2%) and high concentrations of 3-carene (10.9 – 21.1%) were observed in these samples, respectively, compared to oil samples from other countries. The enantiomeric distributions of key terpene markers, viz., β-pinene, sabinene, limonene, and terpinen-4-ol, were determined by chiral GC/MS analysis. Interestingly, for these four monoterpenes, levo-isomers were found to be predominant, emphasizing the highly conserved enzymatic processes occurring in P. nigrum. Moreover, consistent enantiomeric ratios ((−) isomer/(+) isomer) of 92.2 ± 3.0% for β-pinene, 94.8 ± 2.8% for sabinene, 60.7 ± 1.1% for limonene, and 78.3 ± 1.3% for terpinen-4-ol were observed, independent of geographical location. These results demonstrate the potential of using stereospecific compositions as chiral signatures for establishing the authenticity and quality of black pepper oil.

scholarly journals The Influence of the Frequency of the Internet Use on the Behavioral Relationship Model of the Mobile Device-Based Shopping

2016 ◽  
Vol 11 (6) ◽  
pp. 32 ◽  
Author(s):  
Shwu-Ing Wu ◽  
Rou Jyun Chen
Keyword(s):  
Mobile Devices ◽  
Mobile Device ◽  
Internet Use ◽  
Information Quality ◽  
Positive Influence ◽  
The Other ◽  
The Internet ◽  
Relationship Model ◽  
Significant Positive Influence

<p class="ArticleTitle">In recent years, the increasingly innovative and diverse mobile devices have significantly promoted the mobile device-based shopping. What factors influence this kind of shopping? Will consumers purchase things with mobile devices? These are two topics that need to be explored. Through the literature analysis and the empirical research, this study aims to analyze the quality of information, system, service and mobile devices on the mobile device-based shopping platform. Moreover, it studies the attitude of consumers towards mobile device-based shopping, their willingness to adopt the shopping method and the behavioral relationship model in the actual mobile device-based shopping as well as compares the groups of different frequencies of the Internet use in terms of the relationship model.</p>　　With the convenient sampling, this study made an investigation among some of those who had experienced shopping on such mobile devices as tablets or smart phones. The 765 retrieved valid copies of questionnaire were divided into three groups—“often”, “average” and “seldom” according to the frequency consumers undertook mobile device-based shopping and were then compared. The results showed that there were significant differences among the three groups in four relationship paths, including: 1) the information quality of the mobile device-based shopping platform has more significant positive influence on consumers’ attitude path of mobile device-based shopping in the “average” group than in the other two; 2) the service quality of the mobile device-based shopping platform has more significant positive influence on consumers’ attitude path of mobile device-based shopping in the “seldom” group than in the other two; 3) the preference for mobile device-based shopping has much significant positive influence on the behavior path of mobile device-based shopping in the “often” group. According to the research results, different groups have different behavior models. These results can serve as reference information in the decision-making of those who establish mobile device-based shopping platforms and manufacture mobile devices.

OPTIMIZATION OF BIOVANILLIN PRODUCTION OF LEMONGRASS LEAVES HYDROLYSATES THROUGH PHANEROCHAETE CHRYSOSPORIUM

2015 ◽  
Vol 77 (31) ◽  
Author(s):  
Huszalina Hussin ◽  
Madihah Md Salleh ◽  
Chong Chun Siong ◽  
Muhammad Abu Naser ◽  
Suraini Abd- Aziz ◽  
...  
Keyword(s):  
Ferulic Acid ◽  
Nitrogen Source ◽  
Phanerochaete Chrysosporium ◽  
Organic Nitrogen ◽  
Nitrogen Sources ◽  
Optimum Conditions ◽  
Molar Yield ◽  
Primary Screening ◽  
Organic Nitrogen Source ◽  
Inorganic And Organic Nitrogen

The recent study has demonstrated the effects of different nitrogen sources on vanillin production by Phanerochaete chrysosporium. Primary screening supported maximum biotransformation of ferulic acid (from lemongrass leaves hydrolysate) to vanillin by using ammonium chloride and yeast extract as inorganic and organic nitrogen source, respectively. With the 2-level factorial analysis, the optimum conditions of vanillin production from ferulic acid by P. chrysosporium was achieved at 0.192g/L with a molar yield of 24.5%.

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