La metafora laica dei poeti

La metafora poetica: un andar a tentoni capace di conoscere empaticamente le cose trasportandole in un Altro senso

Le grazie dell'acqua

Le grazie dell'acqua(Selezione di testi dall’omonima raccolta

Abitare la lingua maternale. Appunti sulla poesia

Le parole nel poema narrano il loro tentativo di farsi comprendere e nella loro espressività diventano appigli per una comprensione lirica. Ma per fare in modo che ciò sia possibile, il poeta deve «sapere» di loro, della loro natura; conoscere la loro impronta, il loro carattere, la loro postura ma soprattutto comprendere da dove arrivino e da chi, oltre che da che cosa. Bisogna, come ebbe a dire più volte Antonio Porta, «mettersi a bottega», cioè entrare in un'officina scritturale operativa, dove la materia e il materiale sanno come essere compresenti sul tavolo della lingua e del linguaggio, sparsi e impilati tra gli attrezzi del mestiere che, ogni poeta dovrebbe possedere e saper adoperare. Il “mestiere” del poeta è un dedicare tempo alla parola, e il «compito» della poesia è restituirla rigenerata/reinventata dalla propria lingua maternale. Qui la lingua poetica deve farsi più aderente a ciò che si dovrà portare alla luce, a ciò che dovrà mostrare: far vedere. Pensare in poema significa anche rimanere connessi al «luogo dell'elaborazione», in quell'esatto punto in cui la lingua e il linguaggio si installano tra l'esperienza e la sua decifrazione in parola. In tutto ciò la parola esperisce la vita che gli verrà concessa. Essa saprà rendere ciò che gli è stato dato.In the poem the words narrate their attempt to make themselves understood and, in their expressiveness, become holds for a lyrical understanding. But to make this possible, the poet must “know” about them, about their nature; know their imprint, their character, their posture but above all understand, where they come from and from whom, as well as from what. It is necessary, as Antonio Porta said so many times, to “go to shop”, that is, to enter an operational scriptural workshop, where matter and material know how to be present together on the table of language and language, scattered and stacked among the tools of the profession that every poet should possess and know how to manage. The poet's “job” is to dedicate time to the word, and the “task” of poetry is to give it back regenerated / reinvented from one's mother tongue. Here the poetic language must become more adherent to what must be brought to light, to what it must show: to let other people see and seize. Thinking in a poem also means remaining connected to the “place of elaboration”, in that exact point where language is installed between the experience and its deciphering in word. In all this the word experiences the life that was deemed to be its own. It will repay what it has been given

La lingua maternale della poesia

In the poem the words narrate their attempt to make themselves understood and, in their expressiveness, become holds for a lyrical understanding. But to make this possible, the poet must “know” about them, about their nature; know their imprint, their character, their posture but above all understand, where they come from and from whom, as well as from what. It is necessary, as Antonio Porta said so many times, to “go to shop”, that is, to enter an operational scriptural workshop, where matter and material know how to be present together on the table of language and language, scattered and stacked among the tools of the profession that every poet should possess and know how to manage. The poet's “job” is to dedicate time to the word, and the “task” of poetry is to give it back regenerated /reinvented from one's mother tongue. Here the poetic language must become more adherent to what must be brought to light, to what it must show: to let other people see and seize. Thinking in a poem also means remaining connected to the “place of elaboration”, in that exact point where language is installed between the experience and its deciphering in word. In all this the word experiences the life that was deemed to be its own. It will repay what it has been given

Getting lipids from glycerol: new perspectives on biotechnological exploitation of Candida freyschussii

BACKGROUND: Microbial lipids represent a valuable alternative feedstock for biodiesel production when oleaginous microbes are cultured with inexpensive substrates in processes exhibiting high yield and productivity. In this perspective, crude glycerol is among the most promising raw materials for lipid production, because it is the costless residual of biodiesel production. Thus, cultivation of oleaginous yeasts in glycerol-based media is attracting great interest and natural biodiversity is increasingly explored to identify novel oleaginous species recycling this carbon source for growth and lipid production. RESULTS: Thirty-three yeasts strains belonging to 19 species were screened for the ability to grow and produce intracellular lipids in a pure glycerol-based medium with high C/N ratio. A minority of them consumed most of the glycerol and generated visible lipid bodies. Among them, Candida freyschussii ATCC 18737 was selected, because it exhibited the highest lipid production and glycerol conversion yield. Lipid production in this strain was positively affected by the increase of C/N ratio, but growth was inhibited by glycerol concentration higher than 40 g/L. In batch cultures, the highest lipid production (4.6 g/L), lipid content of biomass (33% w/w), and lipid volumetric productivity (0.15 g/L/h) were obtained with 40 g/L glycerol, during the course of a 30-h process. Fed-batch cultivation succeeded in preventing substrate inhibition and in achieving a high cell-density culture. The improved lipid production and volumetric productivity reached the remarkable high level of 28 g/L and 0.28 g/L/h, respectively. The lipids accumulated by C. freyschussii ATCC 18737 have similar fatty acid composition of plant oil indicating their potential use as biodiesel feedstock. Calculated physicochemical properties of a biodiesel produced with the lipids from C. freyschussii ATCC 18737 are expected to meet the European and American standards, being equal to those of rapeseed and palm biodiesel. CONCLUSIONS: C. freyschussii ATCC 18737 could be considered an interesting microorganism for utilization in biofuel industry. Cultivation of this yeast in media containing crude glycerol should be investigated deeper in order to evaluate whether it may find application in the valorization of the waste of biodiesel manufacturing