scholarly journals Evaluation of the Prevalence of Congeners from Distilled Spirits of Different Sources

2019 ◽  
pp. 1-12
Author(s):  
Jude O. Iwouno ◽  
Chigozie E. Ofoedu ◽  
Vivian N. Aniche
Keyword(s):  
Research Work ◽  
Isoamyl Alcohol ◽  
Ethyl Carbamate ◽  
Higher Alcohols ◽  
International Institute ◽  
National Agency ◽  
Mean Values ◽  
Toxicological Effect ◽  
Palm Wine ◽  
Distilled Spirits

Aim: With recent increase in health-related incidence arising from consumption of spirit beverages in Nigeria, there is need to investigate the prevalence of possible contaminants in spirits that may have toxicological effect on human when consumed. The purpose of this study was to determine the type and levels of congeners present in spirits obtained from fermentates of cassava, molasses and palm wine purchased from different locations. Study Design: This study was made to fit a one way Analysis of Variance. Place and Duration of Study: The research was carried out at laboratory of Department of Food Science and Technology, Federal University of Technology, Owerri and Project Development Agency (PRODA) Enugu and International Institute of Tropical Agriculture (IITA), Ibadan, Oyo State, Nigeria, between April 2017 and November 2018. Methodology: Analysis of common congeners in spirits of cassava, molasses and palm wine fermentates obtained through distillation method was carried out using the Gas-Chromatography. Physicochemical properties of the spirits measured were specific gravity, pH and viscosity. The spirit distillates were analysed for concentrations of ethanol, higher alcohols and possible congeners such as esters, ethyl carbamate (EC) and ethyl acetate. Results: The distillates yielded alcoholic content of 39.00 to 46.71%. Ethyl carbamate content of spirits from cassava recorded an average mean value of 13.44 µg/l which was not significantly different from (P > .05) spirits from molasses and palm wine, with an average mean values of 12.49 µg/l and 13.75 µg/l respectively. The most important higher alcohols of the spirit distillates responsible for aromatic characteristic of spirits were found to be 1-propanol (0.06-0.11%), isobutyl alcohol (0.02-0.09%) and isoamyl alcohol (0.12-0.76%). The type and location of raw materials did not significantly affect the concentrations of the available congeners found in the distilled spirits. Good fermentation employed in this research work significantly reduced the concentrations of the detected congeners. Conclusion: Comparing the results with data from literature, it can be concluded that the concentrations of all investigated volatile compounds in the samples of spirits from cassava, palm wine and molasses are commonly acceptable. Federal regulatory agencies such as National Agency for Food Drug Administration and Control (NAFDAC), Standard Organization of Nigeria (SON) should be encouraged to carry out routine analysis on commonly produced and sold spirit beverages in order to prevent sale of contaminated drinks.

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 Genetic diversity and phylogenetic behavior of some minor legumes

2016 ◽  
Vol 7 (1) ◽  
Author(s):  
James Oludare Agbolade ◽  
Ronke Justina Komolafe
Keyword(s):  
Genetic Diversity ◽  
Principal Component ◽  
Calyx Lobe ◽  
Descriptive Statistics ◽  
International Institute ◽  
Mean Values ◽  
Phylogenetic Relatedness ◽  
Petal Length ◽  
Morphological Differences ◽  
Range Test

Twenty-four accessions of twelve species minor legumes collected from the germplasm unit of the International Institute of Tropical Agriculture Ibadan, Nigeria were evaluated for their genetic diversities and phylogenetic relatedness. The accessions were planted into plots of 5 ridges of 5 meters long, spaced 1 meter apart and replicated three times at the Federal University Oye-Ekiti Teaching and Research Farm. The diversity and the relative phylogeny of the accessions were assessed through their floral morphological differences and the mean values between two accessions were evaluated by descriptive statistics. Principal component analysis was employed to identify the most discriminatory floral morphological traits and the similarities among the 24 accessions were assessed by cluster analysis (CA). Descriptive statistics through Duncan multiple range test adopted revealed genetic diversity and phylogenetic relatedness among the accessions. The first two principal component axes explained 64.66% of the total floral morphological variation. Standard petal length, calyx lobe length and stipule length contributed most of the variations in the legume accession. CA grouped the 24 accessions into six clusters. The study revealed intra-specific similarities and inter-specific floral morphological differences among the studied accessions.

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.

scholarly journals On the role of higher alcohols in the characterization of cachaça

2020 ◽  
Vol 9 (10) ◽  
pp. e8299109135
Author(s):  
Amazile Biagioni Maia ◽  
Lorena Simão Marinho ◽  
David Lee Nelson
Keyword(s):  
Isoamyl Alcohol ◽  
Raw Material ◽  
Alcoholic Beverages ◽  
Higher Alcohols ◽  
Isobutyl Alcohol ◽  
Higher Alcohol ◽  
Three Samples ◽  
Typical Range

There is a growing interest in chemical markers for the identification and certification of cachaça as a cane spirit produced in Brazil. It is known that the higher alcohols that are usually analyzed (propyl alcohol, Isobutyl alcohol and isoamyl alcohol) occur in all alcoholic beverages (fermented and distilled), but the relative proportions can vary markedly according to the peculiarities of the raw material and the production process. In this work, the contents of higher alcohols in 300 samples of alembic cachaça were compared, 220 from the state of Minas Gerais and 80 from other states, as well as three samples of industrial cachaça and 14 samples of whiskeys of various brands. The typical range of total higher alcohols in cachaça was 180-360 mg/100 mL ethanol. Cachaça containing higher alcohol concentrations greater than 360 mg/100 mL ethanol do not comply with Brazilian legislation. However, cachaças with higher alcohols concentrations below 180 mg/100 mL ethanol, as was found in one of the industrial cachaças, signify adulteration, for example, by mixing with fuel alcohol. The C4/C5 ratio varied less than the C3/C5 ratio, being consistently within the range of 0.20-0.50. In the whiskeys analyzed, the concentrations of higher alcohols were in the range of 160 and 270 mg/100 mL. Therefore, this parameter would not assist in differentiating between cachaça and whiskey. But the C4/C5 ratio was consistently different, being always greater than 0.50 for the whiskeys. Thus, the routine analysis of higher alcohols provides useful information both for tracking possible fraud and for assessments related to the identity or origin of cachaça.

scholarly journals Effect of some vitamins and micronutrient deficiencies on the production of higher alcohols by Saccharomyces cerevisiae

1993 ◽  
Vol 50 (3) ◽  
pp. 484-489 ◽  
Author(s):  
L.E. Gutierrez
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Alcoholic Fermentation ◽  
Isoamyl Alcohol ◽  
Higher Alcohols ◽  
Micronutrient Deficiencies ◽  
Isobutyl Alcohol ◽  
Yeast Saccharomyces Cerevisiae ◽  
Higher Alcohol ◽  
Alcohol Production ◽  
Acid Deficiency

A study was carried out in order to determine the effect of vitamins (biotin, thiamine, pantotheniic acid and pyridoxal) and micronutrient (zinc, boron, manganese and iron) deficiencies on higher alcohol production during alcoholic fermentation with the industrially used yeast Saccharomyces cerevisiae M-300-A. Zinc deficiency induced a reduction on the levels of isobutyl and isoamyl alcohols. An increase on isobutyl alcohol (fivefold) and a reduction of isoamyl alcohol (two fold) and n-propyl alcohol (three fold) contents resulted from pantotheiiic acid deficiency, whereas pyridoxal deficiency caused an increase on the levels of isobutyl and isoamyl alcohols. Biotin was not essential for the growth of this strain.

scholarly journals TRATAMENTO CIRÚRGICO SPLITTING NAS TENDINITES AGUDAS EXPERIMENTAIS EM EQÜINOS

2002 ◽  
Vol 7 (2) ◽  
Author(s):  
A. L. G. ALVES ◽  
J. L. M. NICOLETTI ◽  
A. THOMASSIAN ◽  
C. A. HUSSNI ◽  
M. J. WATANABE
Keyword(s):  
Research Work ◽  
Control Group ◽  
Histopathological Analysis ◽  
Mean Values ◽  
Repair Tissue ◽  
Superficial Digital Flexor Tendon ◽  
Tendon Lesion ◽  
Group 2 ◽  
The Right

O objetivo deste trabalho foi avaliar a eficácia do tratamento cirúrgico “splitting” em lesões tendíneas agudas induzidas experimentalmente. Para tanto, foram utilizados 8 eqüinos sadios, submetidos à aplicação de colagenase (2ml–2,5mg/ml) nos tendões flexores digitais superficiais (TFDS) dos membros torácicos e após 7 dias da aplicação, foram realizadas incisões percutâneas - splitting - no local da lesão dos membros direitos (grupo tratado), permanecendo os membros esquerdos como grupo controle. Os 8 animais foram divididos em 2 grupos de mesmo número, segundo o período da realização das biópsias (grupo 1 - 30o dia e o grupo 2 - 60o dia após indução da tendinite). A monitoração dos animais foi realizada através de exames clínicos, ultra-sonográficos, análises macroscópica e histopatológica. Ao exame clínico não foi observada diferença significativa entre o grupo tratado e o controle. Com o exame ultra-sonográfico foi constatado que no grupo tratado houve uma significativa redução da área média da lesão naqueles membros em que foram observadas lesões iniciais maiores que 30% da área tendínea. Foram observadas menor celularidade do tecido de reparação e maior fibroplastia nos tecidos tratados, indicando melhor maturação tecidual neste grupo. Através dos resultados obtidos conclui-se que o splitting utilizado em lesões com áreas maiores que 30% da área transversal tendínea reduz o tempo de cicatrização da lesão e melhora a remodelação tecidual. Tendon splitting surgical treatment on experimental equine acute tendinitis Abstract The main aim of the present research work was to study the effects of the splitting on equine experimental tendinitis. Eight horses without soundness problems were used in this experiment. The tendinitis was induced by administration of collagenase (2 ml, 2.5 mg/ml) in the superficial digital flexor tendon (SDFT) of all animals. After 7 days of the induction of tendinitis, an intralesional splitting was carried out with a tendon knife in the right forelimbs, the left forelimbs kept as control. The 8 animals were divided in two groups of 4 according to the period that the biopsies took place: group 1, at the 30th day and group 2 at the 60th day after the splitting had been performed. The splitting and healing processes were monitored by clinical and sonographic examinations during all the experiment, Gross and histopathological analysis of the forelimbs were performed in both groups of animals, at the 30th and the 60th day after the splitting, respectively. Follow-up sonographic examinations displayed the fact that lesions bigger than 30% of the tendon area showed significant decrease in the mean values of the lesion area in the split tendons, when compared with the control group at the days 15, 30 and 60 after the splitting. Split members showed marked improvement in the severity rates and percentile of residual tendon lesion at the 60 day. The cellularity of the repair tissue was significantly lower. besides the fact that there were more mature repair tissue in the split tendons at 30 and 60 days after the splitting. These results allowed to conclude that the split technique used in acute large core lesions reduce the time of wound healing and improve the scar remodeling.

A Tribute to the Extraordinary Research Work Within the Domain of Fatigue and Fracture of Offshore and Ship Structures Carried Out by Prof. Stig Berge and Per Jahn Haagensen at the Norwegian University of Science and Technology

2017 ◽  
Author(s):  
Agnes Marie Horn ◽  
Kenneth A. Macdonald
Keyword(s):  
Science And Technology ◽  
Research Work ◽  
Active Member ◽  
International Institute ◽  
Emeritus Professor ◽  
Ship Structures ◽  
Fatigue And Fracture ◽  
Marine Technology ◽  
Offshore Industry ◽  
Historical Contribution

The motivation of this paper is to highlight the importance of the work carried out during the last decade by Prof. Haagensen and Prof. Berge at the Norwegian University of Science and Technology NTNU, with the aim to inspire and motivate young engineers to continue their important and valuable research within fatigue and fracture. This paper will focus on their historical contribution to the research within fatigue and fracture of offshore and ship structures. Stig Berge is a professor of Marine Technology at the Norwegian University of Science and Technology NTNU. He has spent his academic carrier focusing on fatigue of offshore and ship structures; he has published more than 70 papers and articles in well-known journals and conferences since 80’s. Per Jahn Haagensen is currently an Emeritus professor at Department of Mechanical Engineering and Logistic Faculty of Technology. He has spent his whole research carrier within fatigue and fracture related topics mainly for the offshore industry. He is especially known for the different fatigue improvement methods which have been developed since the 90’s. He has until recently been an active member of the International Institute of Welding (IIW). This article aims to present their main findings and conclusions from their long academic carrier. While the authors have strived to convey in a single paper an overview of the careers and important contributions, the Professors themselves may well have chosen to place a different emphasis on their work.

scholarly journals Genetic Variability and Diversity Analysis in Pod and Seed Characters of Some Neglected and Underutilized Legumes (NULs)

2019 ◽  
pp. 1-8
Author(s):  
J. O. Agbolade ◽  
T. P. Olakunle ◽  
K. M. Popoola ◽  
J. A. Idowu ◽  
A. I. Isiaka ◽  
...  
Keyword(s):  
Genetic Variability ◽  
Principal Component ◽  
Morphological Characters ◽  
Morphological Data ◽  
Diversity Analysis ◽  
International Institute ◽  
Mean Values ◽  
The Mean ◽  
Pod Length ◽  
100 Seed Weight

In response to the paucity of information challenge on the neglected and underutilized legumes, this paper explored pods and seeds morphological data of the twenty-four accessions of these crops with a view to establishing the occurrence of genetic variability and diversity analysis among the studied taxa. Twenty-four accessions of neglected and underutilized legumes (NULs) obtained from International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria were assessed for genetic variability and diversity analysis through Pod and seed morphological characters. Each accession was planted into plot of 5 ridges of 5 meter long, spaced 1 meter apart and replicated three times at the teaching and research farm of the Federal University Oye Ekiti, Ekiti State, Nigeria. Descriptive statistics was employed to evaluate differences in the mean values of the accessions while discriminatory traits among accessions were identified by Principal Component Analysis (PCA). Similarities among the studied plants were assessed by cluster analysis. The first two principal component axes explained 72% of the total variation. Pod length, pod width and 100-seed weight were traits that contributed most of the variations in the legume accessions. There was a display of intra-species similarities and inter-specific genetic diversity among the studied accessions.

scholarly journals Nutrients: trace metals, micronutrients, oestrogen and B-vitamin content of Osun River: A River that runs southwestern Nigeria into the Atlantic Gulf of Guinea

2020 ◽  
Author(s):  
N.B. Afolabi-Balogun ◽  
O.A. Oni-Babalola ◽  
I.I. Adeleke ◽  
F.A. Oseni ◽  
R.H. Bello ◽  
...  
Keyword(s):  
Trace Metal ◽  
High Performance ◽  
Mean Value ◽  
Water Soluble ◽  
Southwestern Nigeria ◽  
Mean Values ◽  
Nutrient Contents ◽  
Toxicological Effect ◽  
The Mean ◽  
B Vitamin

AbstractOsun-Osogbo Grove has a long history of healing and therapeutic claims by adherent believers, in spite of advancement in medicine. Scientists made attempts at investigating the biodiversity of the Grove, till date, there has not been convergence point between science and these indigenous beliefs. This study identified the presence of therapeutic agents in the water of Osun-Osogbo River, paying attention to at least six parameters; vitamin, phosphate, nitrate, amino acid, hormone and trace metal. Water samples were taken from two different sites during pre, during and post raining sessions (April 2017 - September 2019) were analysed using High Performance Liquid Chromatography (HPLC), Gas Chromatography Mass Spectroscopy (GC-MS) and Atomic Absorption Spectrometer (AAS). Trace metal analysis revealed an average of 0.009-0.079 mg/Kg Zinc from site one and lower in site two. The mean value of manganese at both sites was virtually the same at 0.018-0.313 mg/kg, aluminum content was 0.045-0.179mg/Kg at site one, 0.050-0.192mg/kg at site two, cobalt was 0.024 mg/kg at site one, 0.026 mg/kg at site two while nickel was 0.006 mg/kg and 0.004 mg/kg for site one and two respectively. HPLC analysis shows mean Methionine content at both sites is higher than the FDA (56.6 ug/mL); site one had 74.41 ug/mL while site two had 57.11 ug/mL The mean values of two water-soluble vitamins; Thiamine (B1) was 3.758 mg/Kg and 2.355 mg/Kg while Pyridoxine (B6) was 0.108 mg/Kg and 0.072 mg/Kg at site one and two. GCMS analysis of steroidal content revealed values below lowest observed effect level (LOEL), testosterone (4.8 ng/L) and estrogen (2.4 ng/L) were still elevated while ethinylestradiol and estriol were ≥1.5 ng/L. Summarily, site one the major part for spiritual activities showed higher essential nutrient contents than site two which support the enrichment and potential therapeutic properties of the Osun river water. However, further scientific research is required to ensure that these therapeutic potentials supersede the toxicological effect.

scholarly journals Genetic Variability for Flowering Time, Maturity and Drought Tolerance in Cowpea [Vigna unguiculata (L.) Walp.]: A Review Paper

2019 ◽  
pp. 1-18 ◽  
Author(s):  
M. S. Alidu
Keyword(s):  
Genetic Variability ◽  
Drought Tolerance ◽  
English Language ◽  
Critical Role ◽  
Research Work ◽  
Sub Saharan Africa ◽  
International Institute ◽  
Plant Genetics ◽  
Open Access Journals ◽  
Sub Saharan

Background: Cowpea plays a critical role in the lives of millions of people in Africa and other parts of the developing world, where it is a major source of dietary protein that nutritionally complements staple low-protein cereal and tuber crops. It is a valuable and dependable commodity that produces income for farmers and traders. Objective: To review related research work on the genetic variability for time to flowering, maturity and drought tolerance in cowpea. Data Source: Searches were made from the following databases and archives; International Institute of Tropical Agriculture (IITA), The Essential Electronic Agricultural Library (TEAL), Access to Global Online Research in Agriculture (AGORA) (FAO), AGRICOLA (National Agricultural Library), AGRIS - Agricultural Sciences and Technology (FAO), CAS - Chemical Abstracts (ACS), DOAJ - Directory of Open Access Journals, CABI, Euphytica, Elsevier, Research Alert, Scopus and CGIAR, Plant Genetics and Breeding Database, Crop Science Database, Plant Genetics and Breeding Database, data base repositories, using the terms “genetic variability”, “drought”, “tolerance”, “ time to flowering and maturity”, and “cowpea” individually or in combination to identify literature published in English language between January 1990 to January 2018. Methods: The review was carried out using the above search terms. Research papers were critically reviewed, relevant data extracted, and a narrative synthesis was conducted to determine the relevant papers. Results: In all 150 papers met the inclusion criteria. Collections were from varied background; Sub-Saharan Africa, Asia, Europe, and Latin Americas. Conclusion: Despite research studies on cowpea and drought, there appears to be limited such research findings on the time to flowering, and maturity in relations to drought tolerance in cowpea in Ghana, suggesting more research in this part of the world.

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