Atrial natriuretic hormone decreases endocrine response to a combined dexamethasone-corticotropin-releasing hormone test

The presence or absence of tendon calcification was studied at six anatomic sites: Achilles, gastrocnemius, quadriceps, triceps (elbow), triceps long head (shoulder), and rotator cuff. The morphology of the calcifications was categorized in 156 patients with chondrocalcinosis in the knee. Achilles tendon, gastrocnemius, and quadriceps tendon calcifications were most common, ranging from 21%-25% of our patient population was thin linear bands. Triceps calcification at the elbow, rotator cuff calcifications, and long head of triceps tendon calcification were less common.     

Practical experience in the reinjection of cooled thermal waters back into sandstone reservoirs

Intensive investigations into the utilisation of the geothermal potential of the North German Basin began in the early 1980s. The first production and reinjection tests from/into sandstone reservoirs started in 1982 and led to the commissioning of the first geothermal heating plant for heat supply to a residential area in the town of Waren (Müritz) in 1984. More plants were put into operation in Neubrandenburg, Neustadt-Glewe and Berlin. The use of these sandstone reservoirs for heat storage produced new technical solutions. A precise knowledge of the geological and geochemical conditions forms an essential prerequisite for the successful planning, construction and operation of geothermal plants. This paper describes the geological and geochemical conditions, as well as the technical solutions and practical experience acquired so far.     

Determination of Total Sulphur Dioxide in Beer Samples by Flow‐Through Chronopotentiometry

A chronopotentiometric method for the determination of total sulphur dioxide in beer is described. Free and bound sulphites were converted to sulphite anions on alkalising the sample solutions. On acidifying the solution, the released sulphur dioxide was on‐line separated through a semipermeable membrane and transported by an electrolyte into the measuring cell and measured by stripping chronopotentiometry. The proposed method was validated and compared with the three EBC methods. The RSD of repeatability was 8.6% for the normal SO₂ level in the beer (3.4 mg/L). The results corresponded well with those obtained with the alternative EBC methods. The elaborated method was much faster and simpler than the EBC methods.     

直接光控晶闸管在脉冲电源上的应用

具有集成保护功能的直接光控晶闸管（LTT）是得到了广泛应用，这种晶闸管是为高压直流输电（HVDC）而开发的，通过改进门极结构，光控晶闸管也可用于大功率脉冲电源上，由于采用了直接光触发，LTT特别适用于串联应用。     

Quantitative Bestimmung geringer Phosphatmengen in Trinatrium-Phosphonoformiat mittels 31P-NMR-Spektroskopie

Determination of Small Quantities of Residue Phosphate in Tris-Sodium Phosphane Formiate by Means of ³¹P NMR Spectroscopy The concentration of residue phosphate in tris-sodium-phosphon-formiate (TPF·6H₂O) water solutions has been determined via comparing integration of the ³¹P n.m.r. signal of the residue phosphate and one of the ³¹C NMR satellites of the TPF·6H₂O ³¹P n.m.r. signal. The ³¹P n.m.r. spectra have been obtained in inverse gated detection mode; statistical methods of validation prove the certainty of the phosphate concentrations obtained to be excellent and strongly recommend the quantitative method employed for the detection of concentrations down to 0,1%.