101,943 research outputs found
Hydrogenolysis of 1-Aminopyrazoles: Synthesis of Primary and Secondary Alkylamines
No full textThe tautomerizable N‐aminopyrazolone 9, the O‐methyl 1 and N‐methyl derivatives 4 were condensed with carbonyl compounds to give the alkenylaminopyrazoles 12, 2a‐g and 5c, which, under mild conditions, were hydrogenated to the corresponding alkylamino derivatives. The subsequent hydrogenation of the latter ones gave different results according to the structure of the starting material. The 5‐methoxy‐1‐alkylamino‐pyrazoles 3a‐g yielded the 5‐methoxypyrazole 15 and the corresponding primary amines in good yields. On the contrary, N‐methyl‐1‐alkylaminopyrazolone‐5 6c gave 1‐alkylpyrazolone‐3 8. Copyright © 1992 Journal of Heterocyclic Chemistr
Predictability of some pregnancy outcomes based on svm and dichotomous regression techniques
No full textThe objective of this study is developing a forecasting system for some childbirth outcomes, based on an input pattern of instrumental and anamnestic parameters detected at 37th week of pregnancy. The study stems from the need to be able to predict what to expect during labor and childbirth, while discovering new knowledge from the evidence of the data (data mining). Outcomes to predict concern: underweight newborn, post partum bleeding, need for artificially induced birth, necessity of cesarean birth. The predictors parameters are a total of 58 dichotomous inputs grouped into 4 categories: pre-conception risk factors, obstetric risk factors, risk factors associated with pregnancy, ultrasound parameters. The training database is populated with 420 patients, each with a single follow-up. Best leave one out cross-validation results were achieved in the estimation of underweight (ROC point chosen, sensitivity 0.69 -specificity 0.88)
Photochemical rearrangement of Isoxazol-5-ylhydrazines and n-(3-Methyl-4-phenylisoxazol-5-yl)acetamidine
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GUIDELINES FOR A DIGITAL REINTERPRETATION OF ARCHITECTURAL RESTORATION WORK: REALITY-BASED MODELS AND REVERSE MODELLING TECHNIQUES APPLIED TO THE ARCHITECTURAL DECORATION OF THE <i>TEATRO MARITTIMO, VILLA ADRIANA</i>
No full textThe Maritime Theatre is one of the iconic buildings of Hadrian’s Villa, Tivoli. The state of conservation of the theatre is not only the
result of weathering over time, but also due to restoration work carried out during the Fifties of the past century. Although this
anastylosis process had the virtue of partially restoring a few of the fragments of the compound’s original image, it now reveals
diverse inconsistencies and genuine errors in the reassembling of the fragments. This study aims at carrying out a digital
reinterpretation of the restoration of the architectural fragments in relation to the architectural order, with particular reference to the
miscellaneous decoration of the frieze of the Teatro Marittimo (vestibule and atrium).
Over the course of the last few years the Teatro Marittimo has been the target of numerous surveying campaigns using digital
methodology (laser scanner and photogrammetry SfM/MVS). Starting with the study of the remains of the opus caementicium on the
ground, it is possible to identify surfaces which are then used in the model for subsequent cross sections, so as to achieve the best
fitting circumferences to use as reference points to put the fragments back into place
Tetraidropiranil e tetraidrofuranil-eteri con odore floreale.
No full textLa presente invenzione concerne tetraidropiranil- e tetraidrofuranil eteri con odore floreale. Più in particolare, l'invenzione riguarda l'uso di alcuni tetraidropiranil- e tetraidrofuranil eteri come profumi, e come costituienti di formulazioni cosmetiche e detergenti, che si caratterizzazno per uno spiccato odore floreale simile a quello dei fiori di mughetto
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