Biological control by (Coccinella algerica, Kovar 1977) against the puceron of crops under greenhouses (station bioressources of El Outaya Crstra) Biskra; Algeria

Inputs from chemicals, particularly pesticides, to control crop pests have adverse effects on soil and the environment, among others. To reduce pest attacks, biological control with indigenous predators is the alternative and the cleanest, most environmentally friendly and ecologically balanced way.In order to achieve this objective, we carried out ladybird breeding and releases were carried out on vegetable crops under glass in the Bioressources (CRSTRA) station where chemical inputs are not used. This study shows that massive and successive releases larvae Coccinella algerica stage L3 and L4 (10 to 20 larvae C.algerica and ≈350 individuals in Individuals in adult stage / infested plants) reduced effectively the population of aphids.Keywords: Biological control; Coccinella algerica; Vegetable crops; Station Bioressource

Population dynamics of date moth adults in date palm groves in Sidi Okbabiskra; (Sahara – Algeria)

The date moth Ectomyelois ceratoniae (Zeller) (Lepidoptera: Pyralidae)  can cause total production losses and is considered a key pest of date  palm in Algeria. This research aimed to evaluate the adult dynamic of E. ceratoniae in date palm grove throughout one year (2016). Two high flight periods were recorded in the spring and autumn. The first adult emergence was in 6th of Feburary 2016. Also, results showed that climatic factors have a significant influence on the date moth which could only develop over a limited range of temperatures and relative humidity.Keywords: Ectomyelois ceratoniae; Population dynamics; Phoenix dactylifera; sexual pheromone traps; climatic parameters

Computational Laser Spectroscopy in a Biological Tissue

We present a numerical spectroscopic study of visible and infrared laser radiation in a biological tissue. We derive a solution of a general two-dimensional time dependent radiative transfer equation in a tissue-like medium. The used model is suitable for many situations especially when the external source is time-dependent or continuous. We use a control volume-discrete ordinate method associated with an implicit three-level second-order time differencing scheme. We consider a very thin rectangular biological-tissue-like medium submitted to a visible or a near infrared light sources. The RTE is solved for a set of different wavelength source. All sources are assumed to be monochromatic and collimated. The energetic fluence rate is computed at a set of detector points on the boundaries. According to the source type, we investigate either the steady-state or transient response of the medium. The used model is validated in the case of a heterogeneous tissue-like medium using referencing experimental results from the literature. Also, the developed model is used to study changes on transmitted light in a rat-liver tissue-like medium. Optical properties depend on the source wavelength and they are taken from the literature. In particular, light-transmission in the medium is studied for continuous wave and for short pulse

Effect of Spin Dilution on the Magnetic State of Delafossite CuFeO2 with an S = 5/2 Antiferromagnetic Triangular Sublattice

International audienc

L’aspergillome sphenoïdal : a propos d’un cas sphenoidalaspergilloma : a case report

Introduction : L’aspergillose sphénoïdale isolée est une pathologie rare potentiellement grave vu le risque d’extension neuro-méningée et orbitaire. malgré qu’elle est plus fréquente chez les immuno-déprimés, l’atteinte de l’immunocompétent a été décrite. a travers une observation, nous rapportons les caractéristiques clinico-radiologiques, thérapeutiques et évolutives de l’aspergillome sphénoïdal.Observutin : Homme de 35 ans a consulté pour des céphalées rétro-orbitaires évoluant depuis 3 mois. L’examen était normal à part une rhinorrhée purulente postérieure. Le scanner a montré un processus hétérogène comblant le sinus sphénoïdal associé à une lyse osseuse. Une sphénoïdotomiepar voie endonasale a permis de confirmer le diagnostic et de nettoyer les lésions aspergillaires. Un traitement par voriconazol a été associé avec évolution favorable après un recul de 18 mois.Conclusion : L’aspergillome sphénoïdale est l’un des diagnostics différentiel des tumeurs sphénoïdales chez l’immunocompétent. Le traitement est essentiellement chirurgical avec de très bons résultats. L’adjonction d’un antifongique systémique est controversée chez l’immunocompétent.Mots- clefs : aspergillome, sphénoïde, imagerie, Tumeur, chirurgieObjective : Isolated sphenoidalaspergillosis is rare but potentially grave because of the risk of neuro-meningeal and orbitalextension. althoughitis more common in immuno-compromised, the achievement of immunocompetent has been described. Through an observation, we report the clinic-radiological, therapeutic and evolutionary featuresof sphenoidalaspergilloma.Case-report : male 35 years consulted for retro-orbital headache lasting for 3 months. The exam was normal except a purulent rhinorrhea. The CT scan showed a heterogeneous process filling the sphenoid sinus associated with bone loss. Sphenoidotomy by an endonasal approach confirmed the diagnosis of aspergillosis lesions. Treatment with voriconazole was associated with favorable outcome after 18 months.Conclusion : Sphenoidal as pergilloma is a differential diagnosis of tumors in the immuno-competent. Treatment is mainly surgical with good results. The addition of a systemic antifungal agent is controversial in the immunocompetent.Keywords : aspergilloma, sphenoïd, imagery, tumor, surger

L’ectopie des glandes parathyroides dans la chirurgie de l’hyperparathyroidie

Introduction : L’ectopie parathyroïdienne est la cause d’échec la plus fréquente de la chirurgie de l’hyperparathyroïdie, entrainant le plus souvent des reprises chirurgicales. Son diagnostic topographique pré-opératoire reste difficile malgré le progrès dans les différentes explorations radiologiques. Le diagnostic per-opératoire doit être guidé par une stratégie de dissection de référence. Le but de travail est d’étudier la stratégie de recherche des parathyroides lors de leur chirurgie.Matériels et méthodes : Il s’agit d’une étude rétrospective à propos de 137 patients (162 glandes parathyroïdes ectopiques) parmi 572 patients opérés d’une hyperparathyroïdie, colligés sur une période de 11 ans (Janvier 2001-Décembre 2011). Tous les patients ont bénéficié d’une imagerie pré-opératoire et ont été opérés sous anesthésie générale.Résultats : L’âge moyen était de 49 ans (11-71 ans) et le sex-ratio de 1,04. Une hyperparathyroïdie primaire était présente chez 26 patients (18,98%) et une hyperparathyroïdie secondaire à une insuffisance rénale chronique chez 111 patients (81,02%).Une cervicotomie par voie classique avec exploration des 2 loges thyroïdiennes a été réalisée dans 136 cas. Dans les cas où la parathyroïde n’a pas été retrouvée, un geste opératoire a été associé. Ce geste consistait en un curage médiastino-récurrentiel (15 cas), une thymectomie (12 cas) et une lobectomie thyroïdienne (9 cas). Un seul patient a eu une thoracotomie en chirurgie thoracique, sans abord cervical classique. Sur les 162 glandes parathyroïdes ectopiques retenues dans l’étude, 68 étaient des glandes parathyroïdes inférieures. Les localisations de celles-ci étaient par ordre de fréquence le thymus (26 cas), le ligament thyro-thymique (14 cas), le médiastin antéro-supérieur (5 cas) et la gaine carotidienne (3 cas). Vingt glandes parathyroïdes inférieures n’ont pas été retrouvées sur les 68 (29,41%). Le nombre des glandes parathyroïdes supérieures ectopiques était de 94 sur 162. Leurs localisations étaient par ordre de fréquence le pôle supérieur (33 cas), le pédicule supérieur (20 cas), la région rétro-oesophagienne (15 cas), la gaine carotidienne (11 cas), intra-thyroïdienne (5 cas) et le médiastin postéro-supérieur (2 cas). Huit glandes parathyroïdes supérieures n’ont pas été trouvées sur les 94 (8,51%). Au total, sur les 162 glandes parathyroïdes ectopiques, 28 n’ont pas été retrouvées (17,28%).Conclusion : L’imagerie est un moyen incontournable à la recherche d’une glande parathyroïde ectopique. Lorsqu’elle n’est pas retrouvée dans sa localisation habituelle, la stratégie de dissection chirurgicale doit être méthodique.Mots-clés : glande parathyroïde, ectopie, hyperparathyroïdie, imagerie, parathyroïdectomieIntroduction: The ectopic parathyroid is the most common cause of failure of hyperparathyroidism surgery, resulting often in reoperations. Its preoperative topographic diagnosis remains difficult despite advances in various imaging studies. The intraoperative diagnosis should be guided by a reference strategy of dissection.Materials and Methods: This is a retrospective study of 137 patients (162 ectopic parathyroid glands) among 572 patients undergoing hyperparathyroidism surgery, collected over a 11-year period (January 2001-December 2011). All patients underwent preoperative imaging and were operated under general anesthesia.Results: The mean age was 49 years (11-71 years) and the sex-ratio 1.04. Primary hyperparathyroidism was present in 26 patients (18.98%) and hyperparathyroidism secondary to chronic renal failure in 111 patients (81.02%). Cervicotomy through traditional approach with bilateral exploration was performed in 136 cases. In cases where the parathyroid was not found, a surgical procedure was performed. This act consisted in mediastinal-recurrential lymphadenectomy (15 cases), thymectomy (12 cases) and thyroid lobectomy (9 cases). One patient had a thoracotomy in thoracic surgery department without conventional cervical approach. Among the 162 ectopic parathyroid glands included in the study, 68 were inferior parathyroid glands. The locations of these were in order of frequency the thymus (26 cases), the thyro-thymic ligament (14 cases), the antero-superior mediastinum (5 cases) and the carotid sheath (3 cases). Twenty inferior parathyroid glands were not found among the 68 (29,41%). The number of ectopic superior parathyroid glands was 94 of 162. Their locations were in order of frequency the upper pole (33 cases), the superior pedicle (20 cases), the retro-esophageal region (15 cases), the carotid sheath (11 cases), intra-thyroid (5 cases) and the postero-superior mediastinum (2 cases). Eight superior parathyroid glands were not found among the 94 (8.51%). In total, among 162 ectopic parathyroid glands, 28 were not found (17,28%).Conclusion: Imaging is essential to search an ectopic parathyroid gland. When not found in its usual location, the strategy of surgical dissection should be methodical.Keywords: parathyroid gland, ectopia, hyperparathyroidism, imaging, parathyroidectom

Osteite frontale post-sinusitique: Etude rétrospective à propos de 31 cas

Objective : Post-sinusitic frontal osteitis is defined as an extension of frontal sinus infection to the adjacent bony structures. It is an emergency that should rapidly be diagnosed and treated. The aim of this study is to analyze epidemiologic, clinical and paraclinical features, and to review different therapeutic modalities of this disease.Materials and methods : We carry a retrospective study about 31 patients diagnosed and treated between 1996 and 2010. All patients underwent complete ENT and neurological examination, biological investigations, sino-nasal and cerebral CT scan. Antibiotherapy was administrated intravenously. Surgical drainage of the frontal sinus was performed eitherby trephination, by osteoplastic flap confection, or by Lemoyne drain placement. Endonasal drainage consisted of middle meatotomy with anterior ethmoidectomy. Frontal sinus cranialisation was performed with coronal approach. Evolution was assessed on clinical, biological and radiological criteria.Results : Mean age was 24,4 years (8-62 years) and sex-ratio 4,16. Frontal headache (10 cases) and intracranial hypertension signs (8 cases) were the most frequent functional symptoms. Frontal tumefaction was noted in 9 patients, associated in 5 cases with orbital tumefaction of the internal eye angle. Rhinological signs were essentially purulent rhinorrhea(9 cases) and nasal obstruction (5 cases). Nasal endoscopy showed purulent secretions at themiddlemeatus in 12 cases. CT scan revealed a typical aspect of frontal osteitis with bony lysis. A sub-periostal abscess was associated in 7 patients. Intracranial extension was noted in 15 cases and orbital extension in 7 cases. Bacteriological examination was positivein 8 cases. Most frequent bacteria were streptococcus and staphylococcus aureus (3 cases each). Antibiotic therapy was initially administrated in all cases. Concerning initial surgical treatment, 9 patients underwent frontaldrainage and 2 others orbital drainage. On the other hand, 4 patients underwent only sub-periostal abscess drainage. This one was associated with cranialisation in another case. For patients having endocranial complications, empyema drainage was realized in 14 cases, associed in 6 of them with cranialisation. Cerebral abscess drainage was performedin one other patient. Clinical and radiological evolution was favourable in 24 patients (77,4%). The seven other patients were reoperated because of persistence or aggravation of clinical symptoms. Later evolution was favourable.Conclusion : Post-sinusitic frontal osteitis a rare and serious affection. Diagnosis, based on clinical and radiological features, should be early made. Adequate treatment have to be instituted to prevent life-threatening complications.Keywords : osteitis, frontal sinus, sinusitis, computed tomography, drainage, cranialisatio

Proper Orthogonal Decomposition Analysis of an Airfoil Performances under a Small Vortical Gust

This paper investigates the performance of a non-symmetric airfoil in a perturbed flow for a low Reynolds number by creating small vortical structures. A newly designed two-dimensional numerical tool is used to examine the interaction between the NACA 23015 airfoil and the vortex shedding from a square cylinder. Different airfoil position ratios are numerically simulated concerning the square cylinder G/D (D: square cylinder diameter), the channel centerline T/d (d=D/2), and the vortices scale size D/c (c: airfoil chord length). Results show that the maximum values of the lift and drag aerodynamic coefficients are influenced by the airfoil’s lateral and longitudinal positions. The Proper Orthogonal Decomposition (POD) method is used to identify the most energetic flow structures. For all simulated scenarios, it was found that the first two modes reflect the dominating coherent structures in the flow field. The results also show that a leading-edge vortex is formed over the airfoil. The observed phenomena of symmetric and antisymmetric shedding vortex mechanisms essentially depend on the lateral distance of the airfoil T/d and the vortex scale size D/c. However, the spectral analysis demonstrates that the shedding frequency mainly depends on the gap distance G/D