The circular economy and sustainability: a systematic literature review

The interest of this study lies in the fact that the transition from a linear to a circular economy is of key interest in relevant business and academic fields, although the circular economy is an emerging issue and theoretical and empirical research has been limited until recently. However, circular business models are receiving more and more attention, and it is therefore strategically necessary to develop tools that facilitate their implementation. Therefore, because of increasing interest amongst research in the circular economy and sustainability, the purpose of the present study and its strength lies in the systematic presentation of both of these specific academic streams. The approach was qualitative and based on a systematic literature review. We examined several areas in which the circular economy has a place. We highlight sustainability, consumer behaviour, innovation, remanufacturing, operations management, supply chains, intellectual capital, 3D printing, big data, and recycling. We also consider drivers, challenges, the relationship between circular economy and small to medium-sized enterprises, and the influence of circular economy in specific sectors such as textiles and food. It is hoped that the study will facilitate a possible sustainable solution that contrasts with the current linear model of production and resource management. The circular economy has the potential to create positive synergies in economic, social, and environmental areas, despite its recent origin © 2022, Cuadernos de Gestion.All Rights Reserve

Trace elements and C and N isotope composition in two mushroom species from a mine-spill contaminated site

Fungi play a key role in the functioning of soil in terrestrial ecosystems, and in particular in the remediation of degraded soils. The contribution of fungi to carbon and nutrient cycles, along with their capability to mobilise soil trace elements, is well-known. However, the importance of life history strategy for these functions has not yet been thoroughly studied. This study explored the soil-fungi relationship of two wild edible fungi, the ectomycorrhizal Laccaria laccata and the saprotroph Volvopluteus gloiocephalus. Fruiting bodies and surrounding soils in a mine-spill contaminated area were analysed. Isotope analyses revealed Laccaria laccata fruiting bodies were 15N-enriched when compared to Volvopluteus gloiocephalus, likely due to the transfer of 15N-depleted compounds to their host plant. Moreover, Laccaria laccata fruiting bodies δ13C values were closer to host plant values than surrounding soil, while Volvopluteus gloiocephalus matched the δ13C composition to that of the soil. Fungal species presented high bioaccumulation and concentrations of Cd and Cu in their fruiting bodies. Human consumption of these fruiting bodies may represent a toxicological risk due to their elevated Cd concentrations

La importancia de las relaciones investigador-investigado: el caso de las narrativas de vida profesional

Este artículo aborda un tema fundamental en los estudios llevados a cabo desde una perspectiva construccionista y narrativa: el de la relación entre investigadores e investigados. Nuestra aportación se basa en la elaboración de nueve microetnografías, en las que hemos tenido en cuenta de forma especial la dimensión biográfica, con nueve docentes de enseñanza primaria, lo que nos ha permitido: a) poner de manifiesto la importancia de explicitar la relación entre investigadores e investigados; b) examinar las fortalezas y las debilidades de cada tipo y modalidad de relación; c) apuntar la complejidad y el dinamismo de los elementos que configuran las relaciones; d) abrir vía de indagación que puede contribuir a profundizar en los aspectos relacionales que subyacen a la construcción social del conocimientoThis paper addresses a fundamental issue in the studies carried out from a constructionist and narrative perspective: the relationship between researchers and researched. Our contribution is based on the development of nine microethnographies, in which the biographical dimension had a special consideration, with nine primary school teachers. This has allowed us to: a) highlight the importance of explaining the relationship between researchers and those participating in the research; b) examine the strengths and weaknesses of each relationship type and mode; c) point to the complexity and dynamism of the elements underlying relationships; d) open way of inquiry that can help deepen our understanding about the relational aspects involved in the social construction of knowledg

Los exámenes de Física en la enseñanza por transmisión y en la enseñanza por investigación

In this paper we show the results of a comparative ancilysis between ordinary tests of Physics and Chemistry and the ones used from a constructivist view. The study is focused in two aspects: firstly, it aims to show that the constructivist conception of leaming imposes considerable modifications in the tests content; secondly it highlights the deficiencies found in the tests designed after constructivist teaching. These deficiencies will just be solved by an investigation mainly aimed to assessment transformation

V348 Puppis: a new SW Sex star in the period gap

We present time-resolved optical spectroscopy and photometry of the nova-like cataclysmic variable V348 Puppis. The system displays the same spectroscopic behaviour as SW Sex stars, so we classify V348 Pup as a new member of the class. V348 Pup is the second SW Sex system (the first is V795 Herculis) which lies in the period gap. The spectra exhibit enhanced HeII 4686 emission, reminiscent of magnetic cataclysmic variables. The study of this emission line gives a primary velocity semi-amplitude of K1 ~= 100 km/s. We have also derived the system parameters, obtaining: M1 ~= 0.65 Msun, M2 ~= 0.20 Msun (q ~= 0.31), i ~= 80 deg and K2 ~= 323 km/s. The spectroscopic behaviour of V348 Pup is very similar to that of V795 Her, with the exception that V348 Pup shows deep eclipses. We have computed the ``0.5-absorption'' spectrum of both systems, obtaining spectra which resemble the absorption spectrum of a B0 V star. We propose that absorption in SW Sex systems can be produced by a vertically extended atmosphere which forms where the gas stream re-impacts the system, either at the accretion disc or at the white dwarf's magnetosphere (assuming a magnetic scenario).Comment: 6 pages, 10 figures, accepted for publication in MNRA

Эмбрион человека как социально-правовой критерий оценки соответствия уровня нравственных норм, общественных отношений и социального устройства

HUMAN EMBRYO AS A SOCIO-LEGAL CRITERIA OF EVALUATION OF THE CORRESPONDENCE OF MORAL NORMS, SOCIAL RELATIONS AND SOCIAL STRUCTURE. Y. LITVINTSAVAРассматривается одна из основных актуальных проблем современности в рамках брачно-семейных отношений – феномен правового положения статуса эмбриона человека. Отмечается, что умеренные позиции в обществе относительно признания за человеческим эмбрионом права на жизнь значительно разнятся с современным законодательством, в котором, в сущности, отрицается данный факт. Показано, что пренебрежение человеческими правами на начальном внутриутробном периоде развития плода поспособствует формированию негативного отношения и к человеческой жизни в целом после его рождения. Выступая за фиксацию узаконенного статуса человеческого эмбриона, приходим к выводу о необходимости введения дополнений и преобразований различных отраслей законодательства в вопросе теоретического соотношения понятия «эмбрион человека» к терминам «члены семьи» или «близкие родственники». Для более углубленного понимания содержательной основы этих понятий на основе сравнительного анализа за критерий был взят законодательный опыт стран СНГ.= The legal status of the human embryo is one of the main challenges of the modern marriage and family relations. It should be noted that the moderate position in society towards the recognition of the right of the human embryo to life contradicts the current legislation, which denies this phenomenon. Consequently, the negligence of human rights at the early stage of fetal development will contribute to the formation of a negative attitude towards human life in general after birth. Advocating for the legalizatiоn of the human embryo status, the author comes to the conclusion that it is necessary to amend and transform various branches of law in terms of theoretical correlation between the concepts of the “human embryo” and “family members” or “close relatives”. In order to show a more profound meaning of the notions such as “family”, “close relatives” and “family members” the author has conducted comparative analysis of the legislative practice of the CIS countries. The results of the analysis of the foreign legal acts show that the value of the Belarusian termbase shall be improved in terms of theory

Corporate social responsibility and workplace health promotion: A systematic review

The complex situation that global society is facing as a result of COVID-19 has highlighted the importance of companies committing to the principles of social responsibility. Among the internal initiatives, those related to the health of workers are, obviously, highly topical. The objective of our research is to provide concise knowledge of the relationship between workplace health promotion (WHP) and corporate social responsibility (CSR) so that the relevant specialized research was gathered in a single document that lays the foundations of its applicability. A systematic review, following the PRISMA method, has been carried out. Twenty-seven articles have been selected from the main scientific databases. Their qualitative analysis concludes that CSR and WHP are linked, have beneficial reciprocal effects, need committed leadership respectful of autonomy and voluntariness, and require the establishment of specific goals within the framework of the organizations' sustainability policies. Future studies should establish the impact of the pandemic on these aspects

Generalized granuloma annulare after pneumococcal vaccination

Granuloma annulare may be caused by multiple triggers. Among these are vaccinations, which have been described as an infrequent cause of granuloma annulare. The authors report the first case of generalized granuloma annulare associated with pneumococcal vaccination in a 57-year-old woman, who presented cutaneous lesions 12 days after vaccination

Correlation of prostatic artery blood flow assessed by doppler ultrasonography with semen characteristics in beagle dogs

Pulsed-wave Doppler ultrasonography (PwD) is a method used to rapidly and noninvasively assess blood flow dynamics of the canine prostate. Modifications in gland vascularization can affect seminal plasma production and consequently sperm quality. The aim of this study was to determine the normal blood flow parameters of the prostate artery in beagle dogs and to analyze the correlations between vascular flow and semen quality characteristics. PwD was performed on five beagle dogs (5–6 years) measuring vascular features in four different locations of the prostatic artery (cranial, subcapsular, parenchymal and caudal); the measured features were peak systolic velocity (PSV), end-diastolic velocity (EDV), resistive index (RI) and pulsatility index (PI). Ejaculates were obtained using digital manipulation and semen quality was evaluated by determining macroscopic (total volume, sperm-rich fraction volume, color and pH) and microscopic (sperm motility, morphology, viability and acrosome integrity) characteristics. The values of PSV, PI and RI in cranial and caudal prostatic arteries were significantly higher than in subcapsular and parenchymal arteries (p < 0.05). Moreover. a positive correlation of PSV value in the cranial region of the prostatic artery with total ejaculate volume (p < 0.01, r = 0.612) and sperm concentration (p < 0.01, r = 0.587) was determined. PI index was negatively correlated with sperm concentration (p < 0.01, r = -0.709). In conclusion. the results suggest that the prostatic artery blood flow parameters can affect macroscopic semen quality characteristics in healthy dogs

A New Environmentally-Friendly Colorimetric Probe for Formaldehyde Gas Detection under Real Conditions

[EN] A new environmentally-friendly, simple, selective and sensitive probe for detecting formaldehyde, based on naturally-occurring compounds, through either colorimetric or fluorescence changes, is described. The probe is able to detect formaldehyde in both solution and the gas phase with limits of detection of 0.24 mM and 0.7 ppm, respectively. The probe has been tested to study formaldehyde emission in contaminated real atmospheres. The supported probe is easy to use and to dispose, and is safe and suitable as an individual chemodosimeter.This research was funded by the Spanish Government (projects MAT2015-64139-C4-4-R and AGL2015-70235-C2-2-R (MINECO/FEDER)) and the Generalitat Valenciana (project PROMETEOII/2014/047).Martínez-Aquino, C.; Costero, AM.; Gil Grau, S.; Gaviña, P. (2018). A New Environmentally-Friendly Colorimetric Probe for Formaldehyde Gas Detection under Real Conditions. 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