calcium turnings (99.5 purity, from same source) and red phosphorus o r resublirned arsenic o r germanium (99.999 y~L purity, from Messrs. Schuchardt) in stoichiometric proportions by heating a t l l O O 0 C for 24 h in evacuated quartz ampoules. Magnesium nitride and calcium nitride were produced by passing gaseous ammonia over magnesium or calcium turnings at 850 OC. The starting materials were mixed in I : 1 molar ratios and compressed under a pressure of 10000 kg/cmz or sintered in evacuated quartz tubes a t 1000°C for 48 h. The gases resulting from the hydrolysis were identified by mass spectroscopy [2]. In order t o preclude decomposition o f readily labile hydrides before their introduction into the spectrometer, the crystalline mixed phases were decomposed with 2 N HCI with cooling (0 "C) in an evacuated apparatus directly within the instrument. Apart from the known hydrides of phosphorus, arsenic, nitrogen, and germanium, the following products were obtained: P3HS, As3H5, and PH2AsH2 from Mg,Pz/Mg3Asz; P3H~,PH2NH2,PH(NH2)2,P(NH2)3, and PzH3NH2 from Mg3PdMg3Nz; As3H5, AsHzNH2, AsH(NHd2, and As(NH2)3 from MgsAsziMglN2; P3H5 and GeH3PHr [3] from CaGe/Ca3Pz, As3Hs and GeH3AsH2 131 from CaCe/Ca3As~; GeHlNH2 and GeH2(NH2)2 from CaGe/Ca,Nz.
Received, July 29th, 1964[Z 8211642 IEI German version: Angew. Chem. 76, 860 (1964)
Patient controlled analgesia (PCA) has not yet gained universal acceptance for the management of postoperative pain in paediatric surgery. In a prospective study we evaluated feasibility and complications of PCA following 90 cases of laparoscopic or open appendicectomy. PCA proved to be a safe and feasible method with few complications (2% of medical complications, no abort of application, 17 technical checks in a total running time of 4125 h). Acceptance by patients was high and children of all age groups worked the system properly. Assessment of application protocols showed, that the consumption of analgesics was significantly reduced following laparoscopic appendicectomy (P < 0.05). PCA is a safe and feasible method for the management of postoperative pain in children and PCA recording provides an excellent insight into the consumptional behaviour of patients, enabling staff to evaluate postoperative pain for various procedures.
Supracondylar fractures are the most common elbow lesions in children. The standard procedure for displaced fractures has up to now been crossed-wire osteosynthesis. A new option is elastic stable intramedullary nailing (ESIN). We retrospectively reviewed the results of all supracondylar fractures that were treated in our department from 2000 to 2005 by the ESIN technique with the aim to provide evidence of advantages and disadvantages of this method. The mean age of the 60 patients included in the study (27 female, 33 male) was 5.9 years (range 1-12 years). Most patients presented with type II fractures (85%), 10% sustained a type III fracture and 5% the most displaced type IV. All patients were treated with the ESIN technique and underwent clinical and radiological follow-up examinations during the next 3-5 months. Average duration to implant removal was 100 days. All patients achieved free range of movement of the affected elbow. No visible malpositions, pseudarthrosis or nerve lesions were observed, in comparison to the conventional surgical technique (crossed-wire osteosynthesis) with up to 19% for these complications. Furthermore, due to the excellent stability of ESIN, the patients do not need a cast and movement is encouraged immediately. Our good experiences encourage us to continue applying the ESIN technique.
InhaltsubersichtBei der Reaktion von Amidinium-und Guanidinium-hexachloroantimonaten(V) mit PCl, werden jeweils zwei stickstoffgebundene Protonen durch den PC13-Rest ersetzt und es entstehen Bis-und Tris-(trichlorphosphazo)-methyl-hexachloroantimonate. Ihre ,lPund 1H-Kernresonanzspektren geben Ausknnft uber die Struktur der Verbindungen. Die Delokalisation der Ladung auf das Gerust des Kations macht aich durch weitreichende 31P-1H-Kopplung bemerkbar.
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