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  • Electronic Resource  (57)
  • Chemistry  (56)
  • General Chemistry  (4)
  • Angst
  • 1
    ISSN: 1432-055X
    Keywords: Schlüsselwörter Droperidol ; Nebenwirkungen ; Angst ; Anspannung ; Befindlichkeit ; Postoperative Übelkeit und Erbrechen ; Key words Droperidol (side-effects) ; Anxiety ; Tension ; Overall mood ; Postoperative nausea and vomiting
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Abstract Background: Droperidol even in low doses such as 0,5 mg to 1,25 mg can increase postoperative anxiety and state of tension. The aim of this study was to determine whether these side effects occur frequently following low-dose droperidol and to see whether these are dose related. Methods: 184 female in- and outpatients ASA grade 1 and 2 undergoing gynaecological laparoscopy were recruited to this prospective, double-blind study. General anaesthesia was standardized (induction with thiopentone, fentanyl 2 µg/kg and vecuronium 0,1 mg/kg, tracheal intubation, maintainance with enflurane in N2O/O2). Patients were randomly allocated to receive saline (n=45), 0,625 mg (n=46), 1,25 mg (n=47) or 2,5 mg (n=46) droperidol i.v. 10 minutes before the end of surgery. 1, 3, 6, and 24 hours postoperatively, the patients’ anxiety, state of tension and overall mood was evaluated using two psychological questionnaires which had been tested for the perioperative period (Erlanger anxiety and tension-scale / BSKE-EWL-test). Sedation was evaluated by the staff of the recovery room. In addition, postoperative nausea and vomiting (PONV) was assessed using a 100 mm visual analogue scale and by counting the episodes of retching or vomiting. PONV was then rated over the whole observation period as none, mild, moderate or severe using a fixed scoring algorithm. Statistical analysis was performed using the ANOVA and the chi2-test. Results: The patients did not differ with regard to biometric data, duration of surgery and anaesthesia. The postoperative scores for anxiety, state of tension and overall mood were not different between the groups at any observation time (Fig. 1: anxiety and tension: P=0,5687; figure 2: overall mood: P=0,0647). Quality of sleep in the first night after surgery was the same in all groups (Table 2 and 3). Sedation was not significantly different (Table 4; P=0,0704). Furthermore, duration of stay in the recovery room did not differ (P=0,4353). On the other hand, three patients from the 2,5 mg droperidol group had to stay unexpectedly on the ward overnight, because they had been too much sedated to be discharged at home. This was not the case with any patient from the other groups. Compared to placebo, PONV over the whole 24 h observation period was significantly reduced by droperidol (Fig. 3; P=0,0338): completely free from PONV: placebo: 41,3%, 0,625 mg droperidol: 67,4%, 1,25 mg droperidol: 53,2%, 2,5 mg droperidol: 71,7%. Also the severity of PONV was reduced. Conclusion: In gynaecological laparoscopy under general anaesthesia with tracheal intubation, we recommend droperidol 0,625 mg in the prevention of PONV, as it reduces PONV as well as 2,5 mg with no severe sedation in this dosage. Psychological side effects did not occur more frequently after droperidol compared to placebo in any of the investigated dosages.
    Notes: Zusammenfassung In vorliegender Studie wurden das Ausmaß postoperativer Angst, innerer Anspannung und allgemeiner Befindlichkeitsstörungen nach intraoperativ verabreichtem Droperidol und eine mögliche Dosisabhängigkeit dieser Nebenwirkungen untersucht. Zu diesem Zweck wurden erstmals zwei evaluierte Selbstbeurteilungsfragebögen eingesetzt. 184 ASA I und II Patientinnen, die sich einer gynäkologischen Laparoskopie in standardisierter Intubationsnarkose unterzogen, wurden in diese randomisierte, doppelblinde und plazebokontrollierte Untersuchung aufgenommen. Zehn Minuten vor Narkoseende erhielten die Patientinnen i.v. Kochsalz, 0,625 mg, 1,25 mg oder 2,5 mg Droperidol. Angst und allgemeines Befinden sowie Übelkeit und Erbrechen in der postoperativen Phase (PONV) wurden 1, 3, 6 und 24 h postoperativ registriert. Die Werte für Angst und allgemeines Befinden zeigten zu keinem Untersuchungszeitpunkt Gruppenunterschiede. Die Schlafqualität in der ersten postoperativen Nacht war in allen Gruppen gleich. Verglichen mit Plazebo wurde PONV durch Droperidol in jeder Dosierung gesenkt (p=0,0338): komplett frei von PONV: Plazebo: 41,3%, Droperidol 0,625 mg: 67,4%, 1,25 mg: 53,2%, 2,5 mg: 71,7%. Bei gynäkologischen Laparoskopien in Intubationsnarkose empfehlen wir zur Prophylaxe von PONV 0,625 mg Droperidol, da es ebensogut antiemetisch wirksam ist wie 2,5 mg. Psychische Nebenwirkungen wie Angst oder andere Befindlichkeitsstörungen treten in keiner der untersuchten Droperidoldosierungen vermehrt auf.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Biopolymers 24 (1985), S. 1801-1808 
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: We have studied the structure of solid films obtained by x-ray diffraction, from several basic polypeptides with a defined sequence. The alterating polypeptides poly(Ala-Lys), poly(Leu-Lys), poly(Val-Lys), and poly(Arg-Leu) all show a cross-β-structure in which layers of hydrophilic side chains alternate with layers containing hydrophobic side chains. The other polypeptides studied are not in the β-conformation and appear to be in the α-helical conformation. The helices obtained from poly(Lys-Ala-Ala) and poly(Lys-Ala-Ala-Lys) appear to be packed in an unusual fashion, which favors interaction between alanine side chains. Such behavior is not found in poly(Lys-Leu-Ala).
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 20 (1937), S. 159-175 
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 1406-1414 
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 320 (1978), S. 313-323 
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Synthesis of Nitro- and Amino-Substituted Thiobenzamides by Thiolation Reactions with Elemental Sulfur at Mild ConditionsThe Synthesis of thiobenzamides 2-7 by basecatalyzed thiolation of nitro-benzyl-halides (type 1), especially at low temperatures, and the selective synthesis of p- and m-nitro-thio-benzamides (2, 3) or p-and m-amino-thiobenzamides (5, 6), respectively, are described. o-Nitro-benzylhalides (→ 4, 7) are less reactive than p- and m-nitro-benzylhalides.The reaction of nitrobenzylhalides (type 1) with elemental sulfur and amines occuring at low temperatures to give 2-4 leads via structures of the type 11, 15 and 16.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 324 (1982), S. 227-236 
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Derivatives of Imidazolidines from Oxalic AmidinesTetraarylsubstituted oxalic amidines 1 react with acyl chlorides, phosgene, thiophosgene, chlorocarbonylsulfenylchloride, isocyaniddichlorides, and N-aroyl-1-chlorothio-formimidoylchlorides 7 to give the corresponding 5-membered heterocycles 3, 4, 5 and 8.Isocyanates 9 and isothiocyanates 10 react with oxalic amidines to yield imidazolidines 11, 12 and ureas 13, 14.Hydrolysis of 3-5, 8, 11, 12 leads to the corresponding oxo compounds 15, 16.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 328 (1986), S. 497-514 
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Synthesis and Spectral Characterization of Blue Azo Dyes of the Benzene Series53 Donor-acceptor substituted azo dyes of the benzene series were prepared by diazonium-coupling reactions (1 a-s) or halogen-cyanide exchange (→2 a-x, 3 a-j). Described are the preparation of the amines 4 a-m and the coupling compounds 5 a-t and the procedure of diazotizing and coupling.The colouristic and spectroscopic data show that compounds of the general formula 1 are excellent brilliant blue azo dyes useful for dyeing polyester material.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 273-280 
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The Reaction of N-Sulfinylamines with Isocyanides and Synthesis of 2,5-Diaryl-3,4-diarylimino-1,2,5-thiadiazolidin-S-oxidesN-Sulfinylamines 1 react with isocyanides 2 to give isocyanates 3, isothiocyanates 6, and especially 2,5-diaryl-3,4-diarylimino-1,2,5-thiadiazolidin-S-oxides 7.This new heterocyclic ring system 7 can also be synthesized in high yields by a cyclization reaction of tetraarylated oxalic amidines 9 with thionyl chloride.The acid catalyzed hydrolysis of the heterocyclic compounds 7 leads to oxalic anilides 8, the hydrolysis with alkali forms amidines 9. The amidine 9a reacts with N-sulfinyl-p-toluenesulfonamide 11 to give an open chained adduct 12.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 325 (1983), S. 174-174 
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 325 (1983), S. 525-525 
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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