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23. Front-face and right-angle fluorescence spectroscopy for monitoring extra virgin olive oil spectrum evolution

Author

Hernández Sánchez, Natalia, Lleó García, Lourdes, Diezma Iglesias, Belen, Ammari, F., Cuadrado Domínguez, Teresa, Barreiro Elorza, Pilar, Roger, Jean-Michel, Ruiz-Altisent, Margarita, Hernández Sánchez, Natalia, Lleó García, Lourdes, Diezma Iglesias, Belen, Ammari, F., Cuadrado Domínguez, Teresa, Barreiro Elorza, Pilar, Roger, Jean-Michel, and Ruiz-Altisent, Margarita

Abstract

Fluorescence spectroscopic techniques were applied in a study in order to monitor the evolution of the spectral pattern of extra virgin olive oil (EVOO) samples exposed to indirect light at room temperature. Detailed information was extracted from three-dimensional front-face (FF) fluorescence spectra with excitation wavelengths ranging from 230 to 646 nm and emission wavelengths ranging from 250 to 698.5 nm. Relevant emission regions were revealed in FF experiments that were useful to study the variability of the characteristic spectral patterns and to develop fast inspection procedures. Such procedures include simultaneous excitation at wavelengths lower than 400 nm, which was proposed and implemented in a rightangle prototype in order to monitor the evolution of EVOO samples exposed to indirect light. Emission signals at local maxima around 400, 434, 464, 513 and 674 nm were found to be relevant. Ongoing research highlights that hyperspectral images provide spectral patterns of the olives, allowing more precise sorting into categories, which would enable the classification into lots of oils with more homogeneous characteristics for subsequent modelling.

Published
2018

28. Laparoscopic cholecystectomy for gallstones : a comparison of outcome between acute and chronic cholecystitis

Author

Gharaibeh K, Ammari F, Al-Heiss H, Al-Jaberi T, Qasaimeh G, Bani-Hani K, and Al-Natour S

Subjects
lcsh:R, lcsh:Medicine
Abstract

BACKGROUND: Laparoscopic cholecystectomy (LC) is now a common method of treating symptomatic gallstones, and it is increasingly being requested by the informed general public. Our aim was to evaluate the role of LC for cholelithiasis and to establish its outcome and the effect of gender on the results. PATIENTS AND METHODS: Between September 1994 and June 1999, all patients who underwent LC for cholelithiasis were retrospectively reviewed. They were classified as having acute or chronic cholecystitis (AC or CC). RESULTS: There were 791 patients with CC (633 females, 158 males) and 204 patients with AC (124 females, 80 males). Conversion to open cholecystectomy was needed in 0.76% and 11.8% of the patients with CC and AC, respectively (P

Published
2001

46. Clinical aspects of recurrent postpartum thyroiditis

Author

Lazarus, J H, Ammari, F, Oretti, R, Parkes, A B, Richards, C J, and Harris, B

Subjects
Depression, Postpartum, endocrine system, endocrine system diseases, Pregnancy, Recurrence, Thyroiditis, Autoimmune, Humans, Female, Puerperal Disorders, Iodide Peroxidase, Research Article, Autoantibodies, Retrospective Studies
Abstract

BACKGROUND: Postpartum thyroiditis (PPT), characterized by transient hyperthyroidism and transient hypothyroidism, occurs in 5-9% of women. It is accompanied by the presence of circulating antithyroid peroxidase antibodies (TPOAb) which have been associated with an increase in depressive symptomatology compared with TPOAb-negative women. AIM: To assess the frequency and nature of the syndrome in patients studied in detail after more than one pregnancy, as there are only sparse data on recurrence of PPT. METHOD: Fifty-four patients were identified who had participated in at least two of three detailed postpartum studies of thyroid and psychiatric function during the past 12 years in the Caerphilly and Cardiff regions of South Wales. They included two women who had had three pregnancies. All patients had been followed monthly postpartum for at least six months, and 44 had been followed for 12 months. RESULTS: Of the 13 patients who developed PPT after their first pregnancy, nine had a recurrence of dysfunction after a further pregnancy and four remained TPOAb positive. Of the 24 women who were euthyroid anti-TPO positive after the first pregnancy, six developed thyroid dysfunction after a subsequent delivery, 14 remained antibody positive and euthyroid, while four underwent seroconversion and were antibody negative. The control group of 17 women were antibody negative after the first pregnancy; 16 remained negative after a further pregnancy and one became anti-TPO positive. The severity of PPT was slightly, but not significantly worse after the second recorded pregnancy (67% hypothyroid versus 44% hypothyroid). Neither the maximum anti-TPO titre following the first pregnancy, nor the rise in titre during this period were predictive of outcome after a subsequent pregnancy. Data from 26 women showed that recurrent depression was seen in 15.4%; a further six were depressed after the first pregnancy only, and two during a further postpartum period. CONCLUSION: There was a 70% chance of developing recurrent PPT after a first attack, and a 25% risk even in women who were only anti-TPO positive without thyroid dysfunction during the first postpartum period. The recurrence of postpartum depression was not related to thyroid function. Patients noted to have thyroid dysfunction or just to be euthyroid but anti-TPO positive after pregnancy should be assessed carefully after a subsequent pregnancy.

Published
1997

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