PNEUMATOSE KYSTIQUE INTESTINALE ASSOCIEE A UNE STENOSE BULBAIRE SUR ULCERE

Cystic Pneumatosis or pneumatises cystoides of small intestine is a rare affection. Its defined by the existence of gas is found in the digestive tract wall. This affection can be primitive or more often associated to systematic intestinal inflammatory diseases. The signs of this affection are not specific and most of cases are discovered incidentally during surgery or endoscopies. The diagnosis is based on radiological findings. The treatment, however, remains conservative because of the benignity of this disease. The prognosis is conditioned by the underlying disease. We report two cases of cystic Pneumatosis of the small intestine associated to ulcer pyloric stenosis, and we discuss through these cases all diagnosis and therapeutic features of this disease.La Pneumatose kystique intestinale (PKG) est une affection rare, définie par la présence de gaz dans la paroi du tube digestif. Elle peut être primitive ou le plus souvent associée à des maladies inflammatoires systémiques du tube digestif. Symptomatologie non spécifique, parfois de découverte fortuite. Le diagnostic est porté sur la radiologie.  Le traitement est essentiellement  conservateur vu la bénignité de l’affection. Le pronostic étant conditionné par la maladie sous-jacente. Nous rapportons deux cas de pneumatose kystiques intestinale associé à une sténose bulbaire sur ulcère.  A partir de ces deux cas nous avons discuté les éléments du diagnostiques Et l’attitude thérapeutique généralement conservatrice

LYMPHOME NON HODGKINIEN PRIMITIF DU FOIE : A PROPOS D’UN CAS ET REVUE DE LA LITTERATURE

The invasion secondary liver is common during the evolution of systemic lymphoma, primary lymphoma of the liver are very rare estimated at 1% of all extranodal lymphomas. We report a patient of 37 years, without previous medical history especially, who consulted for isolated pain in the right hypochondrium lasting for five months in a conservation context of general condition, abdominal ultrasound revealed a mass of malignant appearance of the left liver, confirmed by an abdominal CT scan. A liver biopsy was performed, showing the histology associated with immunohistochemistry; non-Hodgkin lymphoma, diffuse large B cells expressing CD20, the rest of the staging did not reveal any other location, including not of lymph node involvement. The patient received chemotherapy: RCHOP: rituximab, cyclophosphamide, doxorubicin, vincristine and prednisone, eight treatments, with good clinical and radiological response and good tolerance, with a decline in 4 months.L’envahissement secondaire du foie est fréquent au cours de l’évolution des lymphomes systémiques. Les lymphomes primitifs du foie sont très rares estimés à 1% de tous les lymphomes extraganglionnaire [1,2]. Nous rapportons l’observation d’une patiente de 37 ans, sans antécédents pathologiques particuliers, qui a consulté pour des douleurs isolées de l’hypochondre droit, évoluant depuis 5 mois dans un contexte de conservation de l’état général, l’échographie abdominale et la tomodensitométrie abdominale ont révélé ; une masse du foie gauche d’allure maligne. Une biopsie du foie a été réalisée, montrant à l’étude histologique associée à l’immunohistochimie ; un lymphome non hodgkinien type B diffus à grandes cellules exprimant CD20, le reste du bilan d’extension n’a révélé aucune autre localisation, notamment pas d’atteinte ganglionnaire. La patiente a reçu une chimiothérapie de type RCHOP : rituximab, cyclophosphamide, doxorubicine, vincristine et prednisone, huit cures, avec une bonne réponse clinique et radiologique et une bonne tolérance, avec un recule de 4 mois

Nanocellulose as heat transfer liquid in heat exchanger

Nanocellulose with water and Ethylene Glycol addition to coolant for car radiator application has benefits of improving efficiency of the radiator. Improved efficiency leads to more compact design of the radiator and increases the durability of the engine. The research is conducted to prove that addition of nanocellulose originating from plant base with varying concentration provides a better heat transfer efficiency compared to usage of distilled water as radiator coolant. The objective of the research is to improve and create a new radiator coolant based on collaboration of nanocellulose with readily available coolants which is Ethylene Glycol and to investigate the erosion of nanocellulose coolant on automotive radiator. The scopes of the research are the nanoparticles used in the experiment is nanocellulose between ranges of size 40-80 nm. The tested concentration of the cellulose nanofluids are as of 0.1%, 0.5%, 0.9% and 1.3%. The preparation of cellulose nanofluids are carried out at Advance Automotive Liquid Lab (A2LL) of Universiti Malaysia Pahang. The experiment is carried out by running the radiator test rig with distilled water as radiator coolant. This is done so that the result obtained through experimental analysis of distilled water is a bench mark for the comparison of heat transfer efficiency. The thermal coefficient test indicates that all the cellulose nanofluid with varying concentration possess better heat conducting properties compared to Ethylene Glycol. Furthermore, this proves that cellulose nanofluids can transfer the absorbed heat from the radiator to the surrounding air much faster compared to conventional Ethylene Glycol. Experimental analysis shows that cellulose nanofluids have higher specific heat capacity compared to distilled water. Thus, cellulose nanofluids can absorb and store more heat compared to distilled water. Heat transfer coefficient result supports that application of cellulose nanofluids as car radiator coolant leads to increase in thermal absorption enhancement. However, as the concentration of cellulose nanofluid increase from 0.1% to 1.3% and so on, the heat transfer coefficient decreases rapidly. This is because formation of sediments of cellulose nanoparticles causes inactive involvement in heat transfer process but the sediments do no clogs in the flat tubes or trigger erosion on the internal wall of car radiator. It can be concluded that application of cellulose nanoparticles integrated with Ethylene Glycol as coolant in car radiator is acceptable and provides better heat transfer efficiency

Thermodynamics and X-ray studies of 2-alcohol monolayers at the air water interface

PACS. 61.10.-iX-ray diffraction and scattering - 64.70.Dv Solid-liquid transitions - 68.10.CrSurface energy (surface tension, interface tension, angle of contact, etc.),

Characterization of the growth of 2D protein crystals on a lipid monolayer by ellipsometry and rigidity measurements coupled to electron microscopy.

We present here some sensitive optical and mechanical experiments for monitoring the process of formation and growth of two-dimensional (2D) crystals of proteins on a lipid monolayer at an air-water interface. The adsorption of proteins on the lipid monolayer was monitored by ellipsometry measurements. An instrument was developed to measure the shear elastic constant (in plane rigidity) of the monolayer. These experiments have been done using cholera toxin B subunit (CTB) and annexin V as model proteins interacting with a monosialoganglioside (GM1) and dioleoylphosphatidylserine (DOPS), respectively. Electron microscopy observations of the protein-lipid layer transferred to grids were systematically used as a control. We found a good correlation between the measured in-plane rigidity of the monolayer and the presence of large crystalline domains observed by electron microscopy grids. Our interpretation of these data is that the crystallization process of proteins on a lipid monolayer passes through at least three successive stages: 1) molecular recognition between protein and lipid-ligand, i.e., adsorption of the protein on the lipid layer; 2) nucleation and growth of crystalline patches whose percolation is detected by the appearance of a non-zero in-plane rigidity; and 3) annealing of the layer producing a slower increase of the lateral or in-plane rigidity