Radio‐opaque fecal impaction and pseudo‐occlusion in a dialyzed patient taking lanthanum carbonate

Lanthanum therapy is an efficient therapy of hyperphosphoremia by chelating phosphore in the digestive tract. Lanthanum is a silvery white metallic element that belongs to group 3 of the periodic table. This drug is lightly absorbed and has low water solubility. It should be borne in mind that abdominal X‐rays of patients taking lanthanum carbonate may have a radio‐opaque appearance typical of imaging agents. This characteristic is suggested to confirm adherence of the patient by doing an abdominal X‐ray. We describe in our case a particular good compliant patient with slow digestive transit, which ends by pseudo‐occlusion.     

Enlèvement du phosphore des eaux usées par traitement à base de tourbe dopée aux boues rouges

The addition of an aluminium and iron doping agent, bauxite red mud, has been tested with a commercial peat for thetreatment of a secondary municipal wastewater. Based on a column study, phosphorus (P) removal was raised from about17% to 21% on peat alone to over 95% with red mud treatment of peat. By this mean, the use of red muds allowed areduction of P, concentration effluent to below 0.15 mg/L. The boosting effect of red mud seemed to decrease with timeand especially with the hydraulic loading. For a hydraulic loading of 30 cm/j, P removal met govermental guidelines (_t effluent < 1 mg/L) for a period of 50 days. Other classic efficiency parameters such as BOD₅, COD and coliforms werenot altered by the use of the doping agent.     

Dépôt chimique CVD de silicium dopé in situ au phosphore. Partie 1: Etude expérimentale

The fabrication of silicon layers doped in situ with phosphor using CVD technique is still poorly controlled by the microelectronics industry. Significant thickness heterogeneities are noticeable on circuit and load, which greatly limits the process utilization. An experimental study of this deposition was carried out. The influence of many parameters (temperature, pressure, feed composition) was studied in terms of deposition thickness and uniformity as well as crystalline structure and resistivity. The advantages and involved mechanisms are presented.     

PDP 用荧光粉的亮度衰减

PDP用荧光粉的亮度衰减分成工艺过程的衰减和工作过程中的衰减，工艺过程的荧光粉亮度衰减是由于在焙烧过程中激话剂Eu氧化，蓝色荧光粉的亮度衰减达到了20％，本文提出，在保护气氛或还原性气氛中焙烧可以防止氧化，PDP工作过程中亮度衰减主要是由于真空紫外光辐射和离子轰击，以蓝色荧光粉的亮度衰减最大，达到30％－40％，文中提出，用荧光粉的包膜技术可以解决此问题，寻找新型荧光粉也是一条优良的途径。