Primary lymphoma of the breast. Three cases of non-Hodgkin lymphoma

Primary and sole breast lymphoma is a very rare disease. With the review of our series of 616 cases operated on for breast cancer, only 3 cases (0.48%) of primary breast non-Hodgkin lymphoma (LNH) have been observed. The authors outline the problems concerning diagnosis and therapy of this rare disease: pathological and immunohistochemical aspects are discussed. They stress the importance of staging in order to plan a correct multidisciplinary approach.     

Pre-operational environmental survey at the uranium mine and mill site,Poços de Caldas,Minas Gerais,Brazil

The first Brazilian uranium mine and mill are located on the Poços de Caldas plateau, in the Central State of Minas Gerais. The pre-operational environmental survey was carried out over a period of two years by the Brazilian Nuclear Energy Commission (CNEN), through the Instituto de Radioproteção e Dosimetria (IRD). The selection of the materials to be monitored, the sampling points and the radionuclides to be analysed were based on critical parameters taking into account the meteorological and hydrological characteristics of the site as well as land use. The results obtained are sufficient to characterize the environmental background of the area, and will allow an assessment of the environmental impact due to the operation of the facility and an evaluation of the adequacy of the effluent emmission control measures. In relation to their contribution to the population dose, the results indicated that ²²⁶Ra and ²¹⁰Pb will be the important radionuclides.     

Spontaneous hematoma of the transverse mesocolon

We describe a patient with aspergillosis of the maxillary antrum, and systemic affectation (anemia, anorexia, fever). Through a Caldwell-Luck approach, the maxillary antrum was opened and an irregular mass removed, postoperatively the patient has done well, disappearing in two months the ORL and systemic symptoms.     

The composition of volatile extractives from the wood of Juniperus excelsa, Juniperus foetidissima and Juniperus oxycedrus

J. excelsa , J. foetidissima and J. oxycedrus. Among the compounds the monoterpenes exist in minor amounts while the sesquiterpenes including their oxygenated members as well as sesquiterpene alcohols consist of the majority of the whole substances. The existence of some compounds of the oils might be attributes of the species and their sap- and heartwood. On the other side though notable differences, the essential oils of Turkish juniper woods resemble the commercial cedar wood oils.

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Die Zusammensetzung der flüchtigen Extraktstoffe im Holz von Juniperus foetidissima und Juniperus oxycedrus

J. excelsa , J. foetidissima und J. oxycedrus. Monoterpene bilden einen geringen Anteil der Extraktstoffe. Der Hauptteil besteht aus Sesquiterpenen mit deren Oxydationsprodukten. Das Vorkommen einiger der ?le k?nnte charakteristisch sein für die jeweilige Art bzw. deren Splint- und Kernholz Allerdings gleichen diese ?le, trotz geringer Unterschiede, den wesentlichen ?lbestandteilen von Kommerziellen Zedernh?lzern.

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This work was supported by the research found of the Istanbul University. Project nr: 1335/280799.     

耐高温微生物驱油提高低渗透油藏采收率先导性试验

胜利油田东辛高温低渗透油藏含蜡高,常温微生物无法存活,针对这一问题,引进美国NPC公司耐高温菌种,在Y6-16井组开展高温低渗油藏微生物驱油提高采收率研究和现场试验。施工后Y6-16井日增注52m3,表皮系数由施工前的2.069减小为施工后的-6.31,油层污染得到较好改善;原油含蜡量、胶质沥青质含量降低,轻质组分增加,重质组分降低;井组采收率提高5.09个百分点。     

A simple diborane-degradation model for controlling p-type doping of microcrystalline silicon

The preparation of p-type amorphous- or microcrystalline silicon often requires the use of a gas mixture containing diborane. Whereas the concentration of this gas in the process chamber is critical for the determination of the doping level, and thus of the properties, of resulting films, it is in practice very difficult to have a proper control of such a concentration owing to the degradation of diborane in the cylinder by polymerisation. The main consequence is a significant lack of reproducibility of results. The present paper analyses the problem and its practical influence, describes a simple diborane-degradation model, proposes certain approaches based thereon and shows experimental results illustrating the validity of the procedures suggested. It is finally concluded that the application of this simple model is a straightforward and effective way to control diborane doping level in p-type amorphous- or microcrystalline silicon.