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The method is based on bromination and iodometric back-titration of excess bromine. The average error of a single measurement is ±8 % for 2×10-6 M and ±6 % for 10-4 M solutions. The method can be employed for tannin contents of 1–150 mg/l. Strong reductants and oxidants in concentrations of more than 2×10-5 eq./l cause interferences. Pretreatment of the sample with zinc dust eliminates the interference by oxidants.

A procedure is described for the analysis of solutions containing cyanide, complex cyanides, ammonia and oxidizing chlorine compounds. Our results show the possible existence of free cyanide ions in such solutions. Simultaneous determination is impossible; therefore, after reduction with arsenite solution, the following separations are made by steam distillation (s. d.): (1) S.d. at pH 12 gives the sample ammonia and some ammonia produced by hydrolysis of cyanate (this is under controlled conditions proportional to the cyanate concentration). (2) S.d. at pH 7 (phosphate buffer) gives the free cyanide. (3) S.d. at pH 0 separates complex and free cyanide. (4) Hydrolysation of cyanate at pH 1 (cyanate conc. below 1.2 g/l) and following s.d. at pH 12 gives the sum of sample ammonia and the ammonia equivalent to the cyanate content. Es wird eine Analysenmethode für Cyanid, komplexe Cyanide, Ammoniak und Cyanat in oxydierende Chlorverbindungen enthaltenden Lösungen beschrieben. Nach unseren Ergebnissen kann auch in solchen Lösungen freies Cyanid enthalten sein. Die Bestimmungen sind nebeneinander nicht durchzuführen, daher werden nach Reduktion mit Arsenitlösung folgende Trennungen durch Wasserdampfdestillation (Wd.) durchgeführt: 1. Wd. bei pH 12; erfaßt wird NH3bzw. NH4+und ein kleiner Teil des Cyanates (Hydrolyse zu NH3). Dieser Teil ist bei kontrollierten Bedingungen proportional der Cyanatkonzentration. 2. Wd. bei pH 7 (Phosphatpuffer). Erfaßt wird freies Cyanid. 3. Wd. bei pH 0 zur Abtrennung des Gesamtcyanids. 4. Verseifung des Cyanats (pH 1, Cyanatkonzentration unter 1,2 g/l) und Wd. bei pH 12. Erfaßt wird die Summe an Ammoniak und Cyanat.

Aus dem 4-Methyl-3,6-diacetylglucal wurde nachB. Helferich und Mitarb. durch Anlagerung von Phenanthrenchinon die Epimerisierung zum Derivat der 4-Methyl-glucose durchgeführt, um eine Entstehung von Epimeren mit Sicherheit auszuschließen. —Ferner wird die katalytische Luftoxydation des 4-Methyl-ß-benzylglucosids zur entsprechenden Uronsäure beschrieben, aus der durch hydrierende Abspaltung die freie 4-Methyl-glucuronsäure gewonnen wurde.

A procedure is described for the analysis of solutions containing cyanide, complex cyanides, ammonia and oxidizing chlorine compounds. Our results show the possible existence of free cyanide ions in such solutions. Simultaneous determination is impossible; therefore, after reduction with arsenite solution, the following separations are made by steam distillation (s. d.): (1) S.d. at pH 12 gives the sample ammonia and some ammonia produced by hydrolysis of cyanate (this is under controlled conditions proportional to the cyanate concentration). (2) S.d. at pH 7 (phosphate buffer) gives the free cyanide. (3) S.d. at pH 0 separates complex and free cyanide. (4) Hydrolysation of cyanate at pH 1 (cyanate conc. below 1.2 g/l) and following s.d. at pH 12 gives the sum of sample ammonia and the ammonia equivalent to the cyanate content.

A strong decrease of the amounts of deposited metals was noticed, near the limiting current in the cathodic depositions of cations. This effect shows up, when the potential of the precipitation-free working electrode is suddenly brought to a strongly negative value. A quantum mechanical explanation of this phenomenon is beeing attempted, as yet however only with qualitative results, since the equations obtained can not be integrated.

Salmonellosis is an important foodborne infection in industrialized and developing countries. Especially for human Salmonellosis caused by Salmonella entericaserovar Typhimurium, pigs and pork are the major sources of infection. Mitigation and control strategies that result from surveillance programs attempt to reduce or even eradicate Salmonellain pork to lower consumers' risks. The methodology for Salmonellascreening in pigs is generally based on antibody detection at slaughter with meat juice as the sample matrix. The instructions to most commercial enzyme-linked immunosorbent assay (ELISA) kits for the detection of Salmonellaantibodies state that their product is suitable for antibody detection in meat juice and sera. In the present study, we show that it is essential to recalculate the percent optical density (OD%) data obtained from meat juice by the ELISA (IDEXX HerdCheck swine Salmonella) by the following regression equation: OD%sera= −70.5587 + 128.1490/{1 + exp[(−18.8969 − OD%meatjuice)/27.6032]}1.1771, r= 0.87, to compare results with those obtained from sera. By this regression equation, we were able to compare the Salmonellaantibody levels (classified as <10, 10 to <20, 20 to <40, and ≥40 OD%) for sows, growers, and slaughter pigs. We identified significantly higher numbers of growers with lower OD% levels than for sows and slaughter pigs. Without a recalculation of the meat juice results, the higher fraction of samples with low OD% values led to an underestimation of the actual seroprevalence.

The following case is reported because it is one of unilateral tuberculous infection of the tonsils with extreme reaction in the glands of the neck, which entirely subsided after removal of the point of entrance for the tuberculous infection without any change in the mode of living of the patient or subsequent treatment with tuberculin. PATIENT. —On March 6, 1911, I was called to see Mrs. A. M., 38 years old, who said that lumps had first made their appearance on her neck three months previously. At first they had grown rather slowly, but recently the enlargement had been rapid. EXAMINATION. —The patient was a somewhat emaciated woman who gave no history of recent illness. Lungs showed good resonance and respiration throughout. Heart area and action were normal. Abdomen was negative. There was nothing remarkable on the extremities. On the right side of the neck extending down from the parotid

It has been my misfortune to have to repair lateral tears of the cervix of the uterus without proper assistance, and it seemed to me that an instrument should be devised which would be of assistance in approximating the edges of such a tear by drawing the lips down at he same tension, thus making it, possible to sew them together while keeping their correct relation with each other. Two pair of tenacula are difficult to hold and require an extra pair of hands; therefore, I have designed an instrument for such use. After placing it on the cervix, one set of teeth gripping each lip, it is possible to hold it off to one side, and place the sutures with the other hand. I have found it particularly useful in a few cases where an immediate repair of a small tear in the cervix after delivery is essential.The instrument itself can easily be understood by reference to the accompanying

This case is reported (1) because of the symmetrical placement of lipomas, which showed a marked tendency to follow the paths of certain superficial nerves, and (2) because the distribution of the painful tumors was so characteristic of the typical von Recklinghausen's disease (generalized neurofibromatosis) that the histologic report of multiple lipomas was a surprise.REPORT OF CASEA car repairer, aged 30, and single, came to the surgical department of the Boston Dispensary, complaining of painful lumps on his arms, back and legs. His family history had no relation to his present condition. His habits were confined to the moderate use of tobacco and alcohol, except for an occasional excess in the latter. The patient's own history was unimportant, except that he said he had a complete right-sided "neuritis" at the age of 19, lasting two months, and characterized by dull pain on the affected side. This was not