Carcinome métaplasique du sein avec différenciation osseuse extensive: À propos d’un cas

Le carcinome métaplasique du sein est une entité rare et bien individualisé par l'OMS. Il représente moins de 1 % des cancers invasifs du sein et constitue un groupe tumoral hétérogène soit purement épithélial soit à doublecontingent épithélial et mésenchymateuse. Le carcinome métaplasique avec différenciation osseuse extensive est très rare. Il représente 0.2% des carcinomes du sein. Nous rapportant un cas exceptionnel d'un carcinome métaplasique du sein avec différenciation osseuse extensive chez une patiente de 53 ans. A travers ce cas et une revue de la littérature, les caractéristiques anatomo-cliniques, radiologique, thérapeutiques et évolutives seront discutées

Mejora de la fermentación ácido láctica de alcaparras (Capparis spinosa L) mediante un diseño factorial

The study of the caper fermentation process through an experiment factorial plan allows us to determine a function ƒ such that (Y= ƒ(X1, X2, …, Xn)) existing between magnitude Y which is the decrease of pH (called response), and variables Xi , which are brine, lactic acid, citric acid and lactic ferment (called factors). A complete factorial plan 24 was made in order to determine the factors and the interactions among the factors which have a statistically significant influence on the studied response. Brine, lactic acid and citric acid have a significant effect on the fall of pH; by contrast, lactic ferment does not have a significant effect. On the other hand, the interactions between brine and lactic acid, between brine and lactic ferment , between lactic acid with citric acid and between lactic acid with lactic ferment have significant effects on the fall of pH (p < 0.0001). The fermentation was done in the research laboratory of the society Marocapres- Fez, international leader in the processing of capers, at a temperature of about 30°C, between June and July.El estudio del proceso de fermentación mediante un diseño factorial nos permitió determinar una función ƒ (Y= ƒ(X1, X2, …, Xn)) que existe entre la magnitud Y que es la disminución del pH (llamada respuesta), y las variables X, que son la salmuera, ácido láctico, ácido cítrico y los fermentos lácticos (llamados factores). Un completo plan factorial 24 fue hecho con objeto de determinar los factores y las interacciones entre los factores que tienen una influencia estadísticamente significativa en la respuesta estudiada. La salmuera, ácido láctico y ácido cítrico tienen un efecto significativo en la caída del pH; por el contrario, los fermentos lácticos no tienen efecto significativo. Por otra parte, las interacciones entre salmuera y ácido láctico, salmuera y fermentos lácticos, ácido láctico y ácido cítrico, y ácido láctico y fermentos lácticos tuvieron un efecto significativo en la caída del pH (p < 0.0001). La fermentación fue hecha en el laboratorio de investigación de la Sociedad Marocapres-Fez líder Internacional en la transformación de alcaparras, a una temperatura de aproximadamente 30°C entre los meses de junio y julio

Relationship between cultivation mode of white rot fungi and their efficiency for olive oil mill wastewaters treatment

Four white rot fungi (WRF) strains, Phanerochaete chrysosporium , Trametes versicolor , Coriolopsis polyzona and Pycnoporus coccineus , were tested for efficiency of treatment of Olive Oil mill wastewaters (OOMW) in relation with their cultivation mode, i.e. under the form of free mycelium, mycelium immobilized in alginate beads and solid state cultivation on Petri dishes. Study of biodegradation of phenolic compounds, chemical oxygen demand (COD) decrease and decolourisation of OOMW have shown that Coriolopsis polyzona and Pycnoporus coccineus degradation performances were apparently only slightly affected by the cell cultivation procedures experienced here. In contrast, Phanerochaete chrysosporium and Trametes versicolor showed respectively marked preferences for solid state and alginate immobilisation procedures. Both mono and polyphenolics were reduced to different extent during incubation depending on the strain, as shown by gel filtration analysis. Final pH obtained after fungal treatment of the OOMW based medium (initial pH of 5.0) was measured in order to evaluate the possibility of releasing friendly the treated wastewater in the environment. Laboratory studies as reported here may be useful for orienting the choice of a strain for treating pollution by OOMW in a particular real situation

Environmental and Social Disclosures and Firm Risk

ArticleWe examine the link between a firm’s environmental (E) and social (S) disclosures and measures of its risk including total, systematic, and idiosyncratic risk. While we do not find any link between a firm’s E and S disclosures and its systematic risk, we find a negative and significant association between these disclosures and a firm’s total and idiosyncratic risk. These are novel findings and are consistent with the predictions of the stakeholder theory and the resource based view of the firm suggesting that firms which make extensive and objective E and S disclosures promote corporate transparency that can help them build a positive reputation and trust with its stakeholders, which in turn can help mitigate the firm’s idiosyncratic/operational risk. These findings are important for all corporate stakeholders including managers, employees, and suppliers who have a significant economic interest in the survival and success of the firm

Etude des facteurs influençant la survie des indicateurs de la pollution d'origine fécale et des germes pathogènes dans les eaux usées

L'étude de la survie des coliformes (Escherichia coli) et des germes pathogènes (Salmonella thyphi sérogroupe C et Vibrio cholerae) au laboratoire (microcosmes), a révélé que ces groupes bactériens sont capables de survivre pour des périodes non négligeables (> 7 jours) et à des concentrations importantes. Le suivi de la viabilité de ces populations bactériennes pendant une période de 7 jours, a montré que le phénomène de survie dans les eaux usées est influencée par un certain nombre de facteurs environnementaux, notamment, le biotope d'origine de la souche, la nature du milieu de survie (milieu récepteur), le type bactérien, le pH, et la température. Le suivi du pourcentage des cellules blessées ou agressées, a permis de mettre en évidence une nouvelle stratégie de survie, celle-ci est matérialisée par une capacité de réparation de ces cellules agressées (diminution du pourcentage de ces cellules). Le dosage des protéines intra et extra-cellulaires, a montré que lors de la période de survie, il y a relargage important des protéines dans le milieu réactionnel. Ceci est accompagné par une néosynthèse protéique très active, qui a lieu dès les premières heures de survie

Does It Really Pay to Do Better? Exploring the Financial Effects of Changes in CSR Ratings

International audiencePrevious literature on the link between corporate social responsibility (CSR) and financial performance has focused mainly on the financial implications of a firm's level of CSR without considering the potential effects on financial performance of variations in CSR rating. We try to fill this gap by studying whether variations in a firm's CSR rating affect systematic risk, firm value, and portfolio performance. First, our results show that an increase in firms' CSR efforts, as reflected by an increase in their CSR ratings, significantly reduces systematic risk. Second, a positive variation in CSR ratings significantly improves firm value. Finally, from a portfolio perspective, a strategy that consists of buying stocks that have experienced a CSR ratings increase and selling stocks that have experienced a CSR ratings decrease (or remain stable) leads to lower financial performance. Taken together, our findings provide new evidence and financial implications for firms and portfolio managers. \textcopyright 2018, \textcopyright 2018 Informa UK Limited, trading as Taylor & Francis Group

Etude microbiologique et physico-chimique des rejets liquides des boyauderies au Maroc

Les rejets liquides des boyauderies ont été étudiés sur le plan microbiologique et physico-chimique. Les analyses physico-chimiques comprenaient : le pH, la conductivité, la matière sèche, les cendres, la demande biologique en oxygène, la demande chimique en oxygène, les chlorures, l'azote total et l'azote non-protéique. Les analyses microbiologiques ont groupé la détermination de la flore mésophile aérobie totale, les conformes totaux et fécaux, les staphylocoques, les entérocoques et les Clostridium sulfito-réducteurs. Les résultats des analyses physico-chimiques ont montré que les effluents étudiés ont un pH de l'ordre de 6,35, la matière sèche est de 2,03 g/100 ml avec une demande biologique en oxygène de 8,14 g/l et une demande chimique en oxygène de l'ordre de 8,65 g/l. L'azote total est de l'ordre de 2,32 g/l et les protéines sont de 14,5 g/l. La charge globale moyenne de la flore mésophile aérobie totale (FMAT) est de l'ordre de 107 ufc/ml. Les valeurs moyennes des conformes totaux, des conformes fécaux, des staphylocoques, des entérocoques et des Clostridium sont respectivement de l'ordre de 5,8.106 ufc/ml, 1,4.104 ufc/ml, 5,3-105 ufc/ml, 1,4.109 ufc/ml et 24 ufc/ml. Cependant les salmo-nelles n'ont pas été détectées. L'identification des conformes a montré l'abondance d'E. coli (85 %) comme étant l'espèce la plus représentée, avec la présence de Citrobacter à 12 % et Klebsiella à 3%. 6 % des souches de staphylocoques ont donné une phosphatase et une DNase positives

Reduction of phenolics content and COD in olive oil mill wastewaters by indigenous Yeasts and Fungi

info:eu-repo/semantics/publishe

Financial Analyst Coverage and Corporate Environmental Disclosure

Consistent with the monitoring function played by financial analysts, we find that greater analyst coverage leads to the same extent of improvement in the quantity and quality of environmental information disclosed by the firm. This result is remarkably robust after conducting a difference-indifferences analysis that exploits brokerage closures and mergers as an exogenous decrease in analyst coverage, as well as using an instrumental variable approach. The positive influence of analyst coverage on corporate environmental disclosure is particularly evident for firms that cause high environmental damage, firms with low information asymmetry and those followed by analysts with superior experience, accuracy, and reputation. Taken together, our empirical findings provide new insights into the bright side effect of analyst coverage on corporate environmental related activities

Do Political and Social Factors Affect Carbon Emissions? Evidence from International Data

This study extends the literature on the determinants of carbon emissions by exploring the effects of political and social factors on pollutant emissions. We claim that political stability, corruption, and women in politics significantly influence CO2 emissions. Using the autoregressive distributed lag approach and an extensive dataset that represents more than 145 countries worldwide, we provide strong and robust evidence that low corruption practices and women's representation in politics statistically and economically reduce carbon emissions. We also show that high political stability significantly reduces CO2 emissions in the short run, but not in the long run. Our findings highlight the importance of these factors in reducing pollution worldwide and provide incentives for international regulators and policymakers toward stronger and mandatory decisions that positively evolve less politically stable and corrupt countries. \textcopyright 2022 Informa UK Limited, trading as Taylor & Francis Group