Generic entangling through quantum indistinguishability

We present a general scheme for entangling any degree of freedom of two uncorrelated identical particles from independent sources by a combination of two-particle interferometry and which-way detection. We show that this entanglement generation procedure works for completely random initial states of the variable to be entangled. We also demonstrate a curious complementarity exhibited by our scheme and its applications in estimating the generated entanglement as a function of wave packet overlap at the beamsplitter.     

0+ analogue state in 118Sb from 117Sn(p,nγ) reaction

The analogue of the 0⁺ ground state in ¹¹⁸Sn has been observed in the compound nucleus ¹¹⁸Sb through ¹¹⁷Sn(p,n γ) ¹¹⁷Sb reaction. The neutron decays of this analogue resonance have been studied from the deexciting γ-rays of the residual nucleus ¹¹⁷Sb. From off resonance excitation functions, spin assignments have been made to states in ¹¹⁷Sb, on the basis of Hauser-Feshbach formalism. The resonance parameters of the isobaric analogue resonance have been determined, including the total, proton and neutron decay widths.     

Mechanism of the oxidation of cycloheptanone by chloramine-T

The oxidation kinetics of cycloheptanone by chloramine-T in alkaline media has been investigated. A mechanism involving the formation of an intermediate by the interaction between the enolic anion of cycloheptanone and chloramine-T in a slow step followed by its interaction with another molecule of chloramine-T in a fast step leading to products has been proposed. The scheme satisfactorily accords with the observed stoichiometry, negligible influence of ionic strength and a positive dielectric effect. Various rate parameters have been computed and 1.2-cycloheptanedione identified as the end product.With 2 Figures     

Determination of thiol groups with o-diacetoxy-iodobenzoate

o-Diacetoxyiodobenzoate is used for determining thiol groups by two procedures. In the first, thiols are titrated directly with the reagent at pH 6-8, with leuco-2,6-dichlorophenolindophenol and potassium iodide as indicator. In the second, thiols are treated at pH 7 with an excess of the reagent, the surplus being determined by reaction with excess of mercaptoacetic acid followed by back-titration of the latter with iodine. Both procedures yield results within 0.2% of the theoretical.     

Untersuchung der OberflÄchenspannung der Systeme:

Zusammenfassung Die Oberfl?chenspannungen der Systeme: 1. Wasser/propionsaures Natrium mit verschiedenen Alkoholen; 2. Wasser/buttersaures Natrium mit verschiedenen Alkoholen; 3. Wasser/crotonsaures Natrium mit verschiedenen Alkoholen und 4. Wasser/caprylsaures Natrium mit verschiedenen Alkoholen wurden gemessen, und die Ergebnisse werden im Sinne der in früheren Arbeiten (3, 4) ver?ffentlichten Hypothese diskutiert.

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Summary The surface tension of the systems (1) water-sodium propionate and different alcohols, (2) water-sodium butyrate and different alcohols, (3) water-sodium crotonate and different alcohols and (4) water-sodium caprylate and different alcohols has been determined and the results have been discussed on the basis of the hypothesis suggested in previous papers (3, 4).

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übersetzt von Dr. K, Jaeckel (Marburg/L.)

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Wir danken Herrn Dr. A. Chatterji, Head of the Chemistry Department, für sein Entgegenkommen. Einer von uns (J. M.) dankt dem Scientific Research Grants Committee für ein Stipendium zur Durchführung der Arbeit.     

Synthesis of α-hydroxy-β-lactams

A convenient synthesis of α-hydroxy-β-lactams has been devised that involves the annelation of an inline with benzyloxyacetyl chloride and triethylamine and subsequent hydrogenolysis in the presence of palladium on carbon. In most cases a cis-β-lactam was obtained. A thioimidate can also be used as the imino component in the annelation reaction but the hydrogenolysis step fails. The annelation of the appropriate thiazoline to a 6-epi-penicillin derivative occurred much more readily with benzyloxyacetyl chloride than with azidoacetyl chloride.     

Determination of thiourea and its organic derivatives with iodine trichloride

Thiourea and its organic derivatives and thiosemicarbazide are determined in water, methanol or glacial acetic acid medium by reaction with an excess of iodine trichloride in the presence of mercuric chloride. The reaction is complete in 15 min. The excess of iodine trichloride is evaluated by adding potassium iodide and titrating the liberated iodine with thiosulphate. A variety of organic thioureas can be determined with an average accuracy and precision of 0.2%.     

A study of conductivity of the systems: Water-0.2 N sodium salts of fatty acids and Butanol-I in presence of free acids and alkali (Part II)

Summary From the study of the electrical conductance of the systems: Water-0.2N sodium salts of fatty acids and Butanol-I containing different amounts of free acids, it has been concluded that two types of micelles exist in such systems. Above 50% Butanol-I concentration lipophilic hydromicelles exist, whereas below 50% Butanol-I concentration hydrophilic oleomicelles are formed. It has also been observed that the concentration at which the change in the micelle structure takes place depends on the chain length of the soap. The conductance of the solutions of all the systems goes on decreasing with the increase in Butanol-I concentration as well as with the increase in the chain length of the soap. The results are in agreement with viscosity and surface tension results obtained in the previous communications.

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Zusammenfassung Aus Untersuchungen der elektrischen Leitf?higkeit eines Systems: Wasser/0,2 n Natriumsalze der Fetts?uren und Butanol-I, das verschiedene Betr?ge an freien S?uren enth?lt, wurde auf die Anwesenheit von zwei verschiedenen Mizelltypen in solchen Systemen geschlossen. Bei Konzentrationen von mehr als 50% Butanol-I existieren lipophile Hydromizellen, w?hrend unterhalb 50% Butanol-I hydrophile ?lmizellen gebildet werden. Es wurde beobachtet, da? die Konzentration bei der der Strukturwechsel der Mizellen stattfindet, von der Kettenl?nge der Seife abh?ngt. Die Leitf?higkeit der L?sungen aller Systeme beginnt abzunehmen mit der Zunahme der Konzentration von Butanol-I, wie auch mit dem Wachsen der Kettenl?nge der Seife. Die Ergebnisse sind in übereinstimmung mit den früher erhaltenen bei Untersuchungen von Viskosit?t und Oberfl?chenspannung.