11,718 research outputs found
Human responsibility and divine necessity in Aeschylus’ Oresteia: the Agamemnon’s dilemma (Ag. 205-227)
No full textAeschylean characters have always to face a situation that leads them to an aporia between divine necessity and human responsibility. Aeschylus’ Agamemnon shows how the leader of the Greek expedition against Troy, the instrument of Zeus’ punishment of the Trojans, comes to a miserable end. In Aulis, the goddess Artemis prevents the fleet from sailing and Agamemnon is faced with a terrible decision: he has to sacrifice either his daughter Iphigeneia or the purpose of his expedition. Eventually, he consents to his daughter’s sacrifice, imposed by “the yoke of ἀνάγκη” (Ag. 218). Thus, this action determines Clytemnestra’s revenge and, lastly, his murder planned by her. Agamemnon’s responsibility is the object of disagreement among the scholars: does Agamemnon have to choose between two possibilities or does he rather recognise that there is only one possible choice imposed by ἀνάγκη? Human motives are interlocked with the divine justice. This study aims to analyse the interplay between personal freedom and the limitations imposed by divine necessity in Aeschylus’ Oresteia, by focusing on the so-called “Agamemnon’s dilemma” (Ag. 205-227)
APPLE SLICES ENRICHED WITH ALOE VERA BY VACUUM IMPREGNATION
No full textRecently, the interest in Aloe vera has been increased accordingly with its content in polymannas, which show many healthy effects. The vacuum impregnation (VI) was used to enrich apple slices with Aloe vera gel. The effects of vacuum level, vacuum and relaxation times on the main chemical and physical attributes were described. Results showed as, applying the best operating conditions, VI allowed to introduce Aloe vera gel into the pores of apple tissue reaching a content of polymannan between 1 and 8 mg/100 g of fresh apples
L’Inno a Zeus nella parodo dell’Agamennone: interpretazioni ‘ottimistiche’ e interpretazioni ‘pessimistiche’ (Ag. 160-183)
No full textI vv.160-183 dell’Agamennone, ricordati dagli studiosi come “Inno a Zeus”, rivestono un ruolo centrale all’interno del discorso etico-religioso dell’Orestea. Eschilo mette in scena la tensione tra una volontà superiore, che trascende quella umana e la guida a un esito finale, e l’azione derivante da una scelta che conduce l’uomo a macchiarsi di hybris e a subire l’ineluttabile punizione di Zeus. La sofferenza umana e il senso di tale sofferenza – se si ammette che un senso ci sia – sono le tematiche che emergono dall’Inno. Il Coro descrive come Zeus abbia avviato gli uomini al φρονεῖν ponendo come legge basilare dell’esistenza che ognuno “apprenda attraverso la sofferenza” (πάθει μάθος), cosicché anche chi non vuole acquisisce “la saggezza” (σωφρονεῖν). Il μάθος, il φρονεῖν e il σωφρονεῖν corrisponderebbero a una condizione di “saggezza imposta” dalla divinità, di comprensione razionale della realtà e del πάθος che essa comporta.
La strofe si conclude con due versi, oggetto di un dibattito ancora aperto: δαιμόνων δέ που χάρις βίαιος / σέλμα σεμνὸν ἡμένων. La lezione που, accolta dalla gran parte degli editori, fa sì che il Coro dia un senso alla sofferenza umana, affermando che “c’è, forse, una χάρις concessa dagli dèi”. I codici più antichi, invece, tramandano un ποῦ interrogativo che negherebbe dunque l’esistenza di una giustizia divina – “dov’è la χάρις degli dèi?” – e metterebbe in discussione l’interpretazione tradizionale della trilogia eschilea.
Si intende fornire quindi uno status quaestionis intorno al problema testuale di Ag.182-183 per proporre poi un’interpretazione dell’Inno, della terminologia μάθος/φρονεῖν/σωφρονεῖν, dunque di alcuni aspetti essenziali del pensiero eschileo
Parution: Barbara Fiore, Zakiyatou Oualett Halatine, Ibrahim Ag Youssouf, Maladies et soins en milieu touareg. « Isifran », les remèdes, L'Harmattan, 2022
No full text Maladies et soins en milieu touareg« Isifran », les remèdes Barbara Fiore, Zakiyatou Oualett Halatine, Ibrahim Ag YoussoufPréface de Pierre Boilley - Postface de Jean Goasguen À la fois texte d'histoire, récit de vie, analyse anthropologique, dictionnaire médical et pédagogique du soin, catalogue de diagnostics, de maladies et de remèdes, voici un livre riche, humain et émouvant tout autant qu'indispensable... Le premier choc vient des paroles de la tradi-thérapeute, Fadi, et de ..
Selective Redundancy Removal: A Framework for Data Hiding
No full textData hiding techniques have so far concentrated on adding or modifying irrelevant information in order to hide a message. However, files in widespread use, such as HTML documents, usually exhibit high redundancy levels, caused by code-generation programs. Such redundancy may be removed by means of optimization software. Redundancy removal, if applied selectively, enables information hiding. This work introduces Selective Redundancy Removal (SRR) as a framework for hiding data. An example application of the framework is given in terms of hiding information in HTML documents. Non-uniformity across documents may raise alarms. Nevertheless, selective application of optimization techniques might be due to the legitimate use of optimization software not supporting all the optimization methods, or configured to not use all of them
Natural fibres and their composites
No full textDue to several promising properties, such as their low density and specific properties, low price, easy processing, health advantages, renewability and recyclability, increasing attention was paid in the last years to natural fibres as alternatives to synthetic counterparts for the reinforcement of polymeric based composites [...]
Biogenic Amines in Traditional <i>Fiore Sardo</i> PDO Sheep Cheese: Assessment, Validation and Application of an RP-HPLC-DAD-UV Method
No full textThis contribution aimed to measure for the first time the amount of biogenic amines (BAs) in one of the most ancient and traditional sheep cheese produced in Sardinia, Italy: the Protected Designation of Origin (PDO) Fiore Sardo. To achieve this, an original RP-HPLC-DAD-UV method has been developed that was completely validated in terms of LoD, LoQ, linearity, precision and trueness, and tested on 36 real Fiore Sardo PDO cheese samples produced by four different cheesemakers and marketed by four stores. The average total concentration of the eight BAs (i.e., tyramine, tryptamine, histidine, putrescine, cadaverine, 2-phenylethylamine, spermine and spermidine) measured in Fiore Sardo cheese was 700 mg/kg, with a range between 170 mg/kg and 1100 mg/kg. A great variability in the total amount of BAs has been evidenced among the Fiore Sardo marketed in the four stores as well as for the cheeses purchased in different times in the same store. Tyramine (350 mg/kg), putrescine (150 mg/kg), histamine (80 mg/kg) and cadaverine (30 mg/kg) are the most abundant BAs found in this matrix. Among the many factors concurring, the dominant microflora of Fiore Sardo PDO is likely the principal cause of the qualitative and quantitative distribution of BAs in this matrix. Finally, the total amount of BAs found in Fiore Sardo PDO is not able to cause any health alert situation for consumers
Mechanism of Hydrothermal Zeolite Crystallization from Kaolin in Concentrated NaOH Solutions (1–5 M): Formation of NaP1, NaP2, Analcime, Sodalite and Cancrinite
No full textKaolin from the Donigazza deposit (NW Sardinia, Italy) was used to investigate the mechanisms of zeolite crystallization under alkaline hydrothermal conditions. The starting material, composed mainly of kaolinite and opal-CT with minor quartz and low iron content, was reacted with NaOH solutions (1–5 mol L−1) at 100 °C for 12–168 h. XRD analyses revealed the formation of zeolitic and related phases, including NaP1, NaP2, analcime, sodalite, and cancrinite, with zeolite contents reaching up to 100%. The extent of kaolinite dissolution varied with both NaOH concentration and reaction time, with complete transformation occurring at ≥3 mol L−1 and ≥48 h. SEM imaging showed idiomorphic crystals (100 nm–10 μm) and globular nanoparticles (<50 nm), likely Na-Al-Si gels. Phase distribution reflected evolving solution chemistry, particularly changes in the Si/Al ratio due to differential dissolution of opal-CT and kaolinite. Crystallization proceeded via both classical (monomer addition) and non-classical (particle attachment) pathways, influenced by supersaturation, gel composition, and reaction kinetics. The transition from NaP1 to NaP2, and the development of metastable phases, indicate kinetic control consistent with Ostwald’s step rule. These results provide insights into the complex dynamics of zeolite formation from natural aluminosilicate precursors in alkaline environments
Reuse of spent espresso coffee as sustainable source of fibre and antioxidants. A map on functional, microstructure and sensory effects of novel enriched muffins
No full textTo discover and to use sustainable source of nutrients and functional compounds is an urgent problem to tackle for the modern societies. We have utilized the spent espresso coffee grounds (SECG) to replace - in muffins formulation - mass fractions of 15% and 30% of wheat flour and we have analyzed the changes in texture, microstructure, phenolic content (TPC), antioxidant capacity, fibre and sensory properties. The volume of the enriched muffins didn't change significantly but their microstructure varied considerably. Using SECG, the TPC increased from 2 to 4 times than traditional muffins, whereas the gain of dietary fibre covered the 12-20% of the recommended daily intake and allow meeting the EU claim of 'high in fibre'. Sensory properties were scored greater than 3.5 in a scale of 5, proving that SECG could be used as ingredients for a more sustainable food sector
Polarization dependence of the light coupling to surface plasmons in an Ag nanoparticle & Ag nanowire system
No full textPolarization dependence of the coupling of excitation light to surface plasmon polaritons (SPPs) was investigated in a Ag nanoparticle-nanowire waveguide system (a Ag nanoparticle attached to a Ag nanowire). It was found that under the illumination of excitation light on the nanoparticle-nanowire junction, the coupling efficiency of light to SPPs depends on the polarization of the excitation light. Theoretical simulations revealed that it is the local near-field coupling between the nanoparticle and the nanowire that enhances the incident light to excite the nanowire SPPs. Because the shapes of the Ag nanoparticles differ, the local field intensity, and thus the excitement of the nanowire SPPs, vary with the polarization of the excitation light.Physics, MultidisciplinarySCI(E)EI中国科技核心期刊(ISTIC)中国科学引文数据库(CSCD)[email protected]
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