scholarly journals Salento Honey (Apulia, South-East Italy): A Preliminary Characterization by 1H-NMR Metabolomic Fingerprinting

2020 ◽  
Vol 12 (12) ◽  
pp. 5009 ◽  
Author(s):  
Chiara Roberta Girelli ◽  
Roberta Schiavone ◽  
Sebastiano Vilella ◽  
Francesco Paolo Fanizzi

Honey is a natural sweet substance produced by honeybees from the nectar of flowers, plant secretions or plant-sucking insect excretions. Sugars and water constitute the major components, other minor components characterize the organoleptic and nutritional properties. To date, Salento (Apulia region, Italy) honey production is considerably threatened due to the suggested use of neonicotinoids in order to control the insect-vectored bacterium Xylella fastidiosa (subsp. pauca). Metabolomics based on Nuclear Magnetic Resonance (NMR) spectroscopy was used to describe, for the first time, the composition of honey samples from different Salento producers. Exploratory Principal Component Analysis (PCA) showed, among the observed clustering, a separation between light and dark honeys and a discrimination according to producers, both further analyzed by supervised multivariate analysis. According to the obtained data, although limited to small-scale emerging production, Salento honey shows at the molecular level, a range of specific characteristic features analogous to those exhibited by similar products originating elsewhere and appreciated by consumers. The impact on this production should therefore be carefully considered when suggesting extensive use of pesticides in the area.

Author(s):  
D.V. Budianskyi

The characteristic features of I. Kavaleridze’s drama is considered in the article. It is noted that there are signs of the artist’s individuality, attraction to expressionist forms, artistic techniques characteristic for the art of sculpture: symbolism, monumentality, hyperbole. I. Kavaleridze was well versed in the drama laws, understood the specifics of the stage events construction, had a large arsenal of literary means, thanks to which the characters’ monologues and dialogues were extremely expressive and colorful. In his work, he implemented original solutions that were ahead of time. Therefore, many of the artist’s ideas and achievements received due recognition only after his death. I. Kavaleridze’s creative heritage covers a wide range of both purely artistic and general philosophical problems. Among them the formation of the era of modernism and its features in the Ukrainian art of the early XX century, the impact of revolutionary ideas on the work of the 1920s, the role of spiritual leaders of the Ukrainian people T. Shevchenko and G. Skovoroda in the formation of national consciousness, political and ideological pressure on figurative art language and the formation of a socialist-realist canon, etc. The analysis of the productions of I. Kavalerizde’s plays “The First Furrow” and “Gregory and Paraskeva” on the stage of the Mykhailo Shchepkin Sumy Theater of Drama and Musical Comedy in 1970-1972. The article notes that these plays were staged in Sumy for the first time in the history of Ukrainian theater. The premiere of “The First Furrow” (the play was called “Old Men”) took place on March 19, 1970. The figure of the national genius Hryhoriy Skov oroda was als o embodied for the first time on t he stage in Sumy in th e play “Hryhoriy and Paraskeva”. It premiered on October 21, 1972. I. Rybchynsky, Honored Artist of the USSR, performed the production. Creating generalized historical outlines of people’s life, features of life at that time, depicting psychological portraits of people in various, sometimes-dramatic collisions, in the productions of I. Kavaleridze’s plays on the Sumy stage the emphasis was on universal values such as virtue, love. The main character was the Ukrainian people, who nurtured such large-scale historical figures, gave them strength and wisdom for great achievements. Based on publications in periodicals of that time, memoirs of Ukrainian directors, the peculiarities of the director’s interpretation, stenographic and musical design of these plays on the Sumy stage are considered. Considerable attention is paid to the analysis of acting works in I. Kavaleridze’s plays. In particular, the peculiarities of the actor’s embodiment of the image of the national genius Hryhoriy Skovoroda on the stage are presented. It is noted that I. Kavaleridze’s plays, created in a difficult political, social and ideological context, are rightly considered to be highly artistic works of Ukrainian drama. Their staging was carried out on various theatrical stages, including Mykhailo Shchepkin Sumy Theater of Drama and Musical Comedy is an important page of national theatrical art.


Kybernetes ◽  
2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Bin Xi ◽  
Huimin Jing

PurposeConsidering that listed companies are the main body of natural resource consumption and pollutant emission, this study aims to explore the stock price effect and source channels of green bond issuance of listed companies. This is extremely necessary to promote listed companies to actively fulfill their environmental responsibilities so as to achieve sustainable economic and social development.Design/methodology/approachIn this paper, the companies that issued green bonds in Shanghai and Shenzhen stock markets in China from 2016 to 2018 are used as samples. First of all, the authors adopt the event study method and match the two models to prove that there is a stock price effect in green bond issuance. Then, the authors introduce the general regression model to analyze the sources of the stock price effect of green bond issuance in detail through three channels: “financing cost,” “investor attention” and “fundamental.”FindingsIn the above three channels, the “investor attention” channel can well explain the stock price effect of green bond issuance. Meanwhile, the authors also find that the stock price effect of the subsequent issuance of green bonds is more significant than that of the first time, non-financial companies are more pronounced than financial companies, public issuance are more obvious than private issuance, state-owned companies are more notable than non-state-owned companies, small-scale companies are more evident than large-scale companies and companies with high equity concentration are clearer than those with low equity concentration.Originality/valueTaking China as the research object for the first time, this paper comprehensively employs the capital asset pricing model and Fama–French five-factor model to discuss the stock price effect of green bond issuance of listed companies. Secondly, this paper also studies whether the way of green bond issuance, the type and size of the company, as well as the degree of ownership concentration will have different effects on the stock prices of listed companies. The research results provide new ideas and methods for the stock price effect of green bond issuance.


2016 ◽  
Vol 71 (3) ◽  
pp. 456-462 ◽  
Author(s):  
Muhammad Mumtaz ◽  
Ahsan Mahmood ◽  
Sabih D. Khan ◽  
M. Aslam Zia ◽  
Mushtaq Ahmed ◽  
...  

Polymers are among the most commonly used materials in our everyday life. They are generally transparent to terahertz (THz) radiation, but are quite difficult to differentiate using optical techniques as few or no characteristic features exist in the spectral range of <2.0 THz for small and portable radiation systems. In this work, we report experimental measurement of refractive indices and absorption coefficients of styrene acrylonitrile (SAN) and Bakelite in the spectral range of 0.2–2.0 THz for the first time. Additionally, we demonstrate that by combining principle component analysis (PCA) with THz time-domain spectroscopy one can differentiate such polymers. In this analysis, the first three principle components PC1, PC2, and PC3 depict >94% variance with a distribution of 72.45%, 11.52%, and 9.38%, respectively.


2019 ◽  
Vol 24 (01) ◽  
pp. 1950001 ◽  
Author(s):  
SOPHIA Z. E. MUKORERA

The rapidly growing informal micro and small-scale enterprise sector in Zimbabwe is an issue of concern because the government is still struggling to revive the economy from the effects of economic meltdown. Of main concern is the lost revenue through tax evasion. The growing informal sector is believed to be a result of the poor quality of certain institutions, high corruption levels in the country and lack of incentives to formalize. The objective of this study was to analyze the impact of growth constraints on the willingness to formalize by informal MSEs. Twenty internal and external growth inhibiting factors were analyzed using Principal Component Analysis (PCA) and a logistic model was estimated on a dichotomous variable of willing/not willing to formalize. The results show that willingness/unwillingness to formalize by informal entrepreneurs in Zimbabwe is significantly related to institutional imperfections and asymmetry of bureaucracy associated with the registration process, lack of access to technology, market and financial constraints and lack of entrepreneurial and management skills. Improving the bureaucracy of the registration process and access to technology may possibly increase the odds of the informal operators formalizing their businesses. However, improvement in market and financial constraints and entrepreneurial and managerial skills will decrease the odds of willingness to formalize.


2021 ◽  
Vol 9 (6) ◽  
pp. 9-30
Author(s):  
. Sujarwanto ◽  
Kieron Sheehy ◽  
Khofidotur Rofiah

The global pandemic has accelerated the ‘move online’ of higher education in Indonesia. This study aimed to examine the relationship between Indonesian students’ experiences of studying online, their epistemological beliefs and their beliefs about fun in learning. A mixed method approach was used to examine this relationship in a sample of 774 students. A Principal component analysis (PCA) of questionnaire responses identified associations between social constructivist beliefs about learning and the centrality of fun in learning. The PCA was considered together with a thematic analysis of an open question ‘Has the COVID-19 situation changed your feelings about online study?’ This revealed the significance of the epistemic mismatch between many students’ beliefs and the transmissive online pedagogy that they described. This mismatch is implicated as a factor in understanding the students largely negative experiences of online study and the impact on their well-being, albeit within the context of a pandemic. This is the first time that this link has been proposed. The research indicates that examining students’ epistemological beliefs can offer insights that are helpful in understanding students’ educational engagement and well-being when studying online.


2018 ◽  
Vol 120 (12) ◽  
pp. 2832-2842 ◽  
Author(s):  
Willard Navicha ◽  
Yufei Hua ◽  
Kingsley George Masamba ◽  
Xiangzhen Kong ◽  
Caimeng Zhang

PurposeThe purpose of this paper is to evaluate the changes in descriptive sensory properties and overall consumer acceptability of soymilk prepared from roasted soybeans.Design/methodology/approachIn total, 12 purposively selected post graduate students majoring in Food Science conducted descriptive sensory analysis after being trained for 18 h in sensory analysis, while 75 untrained students conducted consumer acceptability test of soymilk prepared by roasting soybeans at a temperature of 110°C for 20, 40, 60, 80 and 100 min and at 120°C for 20 min.FindingsResults have revealed that roasting soybeans improved sensory properties by significantly (p<0.05) decreasing the objectionable green, beany flavours and increasing sweet taste, viscosity and roasted flavour. Furthermore, results from the principal component analysis revealed that aroma and sweet taste were the most critical sensory attributes. In addition, it was found out that soymilk samples prepared by roasting soybeans at 110°C for 40 and 60 min and at 120°C for 20 min were significantly more acceptable than the control soymilk.Research limitations/implicationsThe participants in this study were from one locality and predominantly soybean consuming community and therefore there is need to conduct the study in a different locality in order to validate the study findings.Practical implicationsThe study can assist small scale processors that might not have access to lipoxygenase-free soybeans and other technologies for improving the quality of soymilk.Social implicationsThe study can be used as a guide for connecting the food processers with the external world of consumption.Originality/valueFor the first time, the study findings have demonstrated that controlled soybean roasting can be a useful strategy for improving soymilk sensory properties and consumer acceptability. The findings in this study can be usefully used in the quality control of soy bean-based products.


Animals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1354
Author(s):  
Assem Abu Hatab ◽  
Zhen Liu ◽  
Asmaa Nasser ◽  
Abourehab Esmat

As in many other countries, the outbreak of the COVID-19 pandemic, together with subsequent government containment measures, posed significant challenges to small-scale broiler production systems in Egypt. Based on a survey of 205 specialist small-scale commercial broiler farms (SCBFs) consisting of both farm-based and household-based production systems, this study identifies the primary pathways through which COVID-19 has affected SCBFs and investigates the determinants of farm perception of these effects. A polychoric principal component analysis sorted the effects of the pandemic on the SCBFs surveyed into five categories, namely, input availability, production and operational costs, labor and human resources, consumer demand and sales, and farm finances. Next, five ordered logit models were constructed to examine the determinants of the SCBFs’ perception of each category of these effects. Generally, the empirical results revealed that COVID-19 affected SCBFs heterogeneously based on their management and production systems and resource endowment. Female-led and household-based SCBFs perceived significantly greater COVID-19 effects. In contrast, individually owned farms and those with membership of poultry producer organizations and larger total asset values perceived fewer effects. In addition, SCBFs operating in both local and provincial markets were less likely to perceive negative effects from the pandemic on their broiler farming activities. Although the adoption of strict and immediate containment measures was essential for controlling the virus and protecting public health, our results indicate that policy responses to COVID-19 must consider the likely effects on small businesses such as SCBFs since disruptions to such socioeconomically important supply chains will intensify human suffering from the pandemic. Overall, our findings provide important implications for the formulation of effective strategies for mitigating the impact of COVID-19 on small-scale broiler production systems in Egypt and enhancing their preparedness and resilience to future pandemics, natural hazard risks, and market shocks.


1968 ◽  
Vol 33 ◽  
pp. 57-69 ◽  
Author(s):  
J. E. Kerrich ◽  
D. L. Clarke

For many years archaeologists interested in the study of the Palaeolithic in North Africa and Eurasia have been using cumulative percentage frequency graphs for the comparison of prehistoric artefact assemblages. For examples we refer to the references at the foot of this text. However, it is perhaps time to carefully review this technique and its future utility.Statistical techniques and mathematical models are slowly infiltrating and reshaping the discipline of archaeology—increasing the power and depth of both analysis and synthesis. It is perhaps already possible to distinguish the cumulative advance of these techniques in archaeology from the initial role of demonstrative aids and methods of data display towards an increasingly powerful analytical role with a capacity for predictive inference. In the ranks of the first generation we have the early use of graphs, frequency polygons and histograms for mapping severely limited numbers of percentages or attribute ratios. In the second generation of statistical techniques the impact of the computer is felt for the first time and archaeology is developing an array of exploratory attempts to integrate the probing capacity of such methods as factor analysis, matrix analysis and principal component analysis.


2011 ◽  
Vol 24 (17) ◽  
pp. 4662-4675 ◽  
Author(s):  
Chee-Kiat Teo ◽  
Tieh-Yong Koh ◽  
Jeff Chun-Fung Lo ◽  
Bhuwan Chandra Bhatt

Principal component analysis (PCA) is able to diagnose the diurnal rain cycle in the Maritime Continent into two modes that explain most of the diurnal variability in the region. The first mode results from the differential variation in potential instability forced by surface heat flux, insolation, and longwave radiative cooling on land and sea. The second mode is associated with intrinsic mesoscale dynamics of convective systems and its interactions with gravity waves, density currents, and local circulations in coastal regions or mountainous terrain. The spatial phase relation between the two modes determines whether a diurnal signal is propagating or stationary. Thus, validating model simulations of diurnal rainfall using PCA provides insights on the representation of dynamics and physics. In this paper, the main modes of diurnal rain variability in the Maritime Continent from satellite observations are studied and are compared with those from Weather Research and Forecasting (WRF) model simulations. Hovmoeller analyses of the reconstructed rainfall from the first two PCA modes clarify the impact of coastlines and mountains as sources of propagating signals. Wave cavities are identified in the Straits of Malacca, Malay Peninsula, and north Sumatra where stationary signals are produced. WRF reproduces the first two modes but each with a phase lead of about 1–2 h or longer, depending on the satellite rainfall product used for comparison. The basic diurnal forcing in the model seems to be too strong and the model responds too strongly to small islands and small-scale topography. The phase speed of propagating signals over open sea is correctly modeled but that over land is too slow.


Nanomaterials ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 639 ◽  
Author(s):  
Jana E. Black ◽  
Andrew Z. Summers ◽  
Christopher R. Iacovella ◽  
Peter T. Cummings ◽  
Clare McCabe

Cross-linked chemisorbed n-alkylsilane (CH3(CH2)n−1Si(OH)3) monolayers on amorphous silica surfaces have been studied and their structural properties and frictional performance were compared to those of equivalent monolayers without cross-linkages. The simulations isolated for the first time the effects of both siloxane cross-linkages and the fraction of chains chemisorbed to the surface, providing insight into a longstanding fundamental question in the literature regarding molecular-level structure. The results demonstrate that both cross-linkages and the fraction of chemisorbed chains affect monolayer structure in small but measurable ways, particularly for monolayers constructed from short chains; however, these changes do not appear to have a significant impact on frictional performance.


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