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Copyright of Canadian Public Administration is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Public Administration is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Review of Income & Wealth is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Sociologia Ruralis is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The author has studied Ophrys insectifera L. (Orchidaceae) in respect of floral biology during several years in South Sweden (province Öland), North Sweden (province Jämtland), and Norway, Field observations as well as experiments have been performed. In Algeria, Morocco, and Lebanon other species of Ophrys are being studied by the author. Many insect species and several spiders are recorded as visitors — accidental or regular — on the flower of O. inisectifera. In Sweden the author hitherto has observed two Sphecids (only males), Gorytes mystaceus L. and Q. campestris L. (= fargei Sm.), and one Staphylinid, Anthobium minutvm F., as the only regular and effective pollinators. The Gorytes males are attracted by the scent of the flower which is stated by the author being similar to one of the female of mystaceus. The outline or contour does not attract, but the dark purple colour of the labellum has in a near distance some attractiveness. Anthobium is pollenfeeding. The scent of the flower stands between that of farnesol and hydroxyeitronellal. I have stated that odours resembling those of farnesol, eitronellol, eitronellal etc. are rather common among Apids, Sphecids and Ichneumonids. In many flower perfums these constituents are to be found. The Gorytes males are strongly attracted and excited by the scent of the flower and behave on the labellum in a similar way as during the introduction to copula depending on tactile stimulation from the stability, contour and hairy coat of the upper surface of the labellum. During the tactilely guided movements the pollination is brought about. Anthobium is not tactilely stimulated in this way. There are resemblances between the superficial structures of the upper side of the labellum and that of Gorytes. The author considers whether the biological dependence of the O. insectifera to the Gorytes males in respect of the fecundation is to be regarded as an adaptation or not. It seems that the plant utilizes the somewhat "imperfect" releasing mechanism of the copulatory activity of the Gorytes males. The occurrance of pollinators of the "Anthobium-type" must not be depreciated even though it is possible that O. insectifera originates from a milieu populated by insects of the same or similar ethological constitution as the two Gorytes species — or perhaps by just the same Gorytes species. Perhaps Anthobium minutum or a related type has played a rather important role for the distribution of O. insectifera in regions with cold climate. I have not been able to state spontaneous autogamy as it is discussed by ZIEGENSPECK and WOLFF. It seems to me, as the bending down of the pollinia or the falling out of them on the labellum described by these authors, ought to be regarded as vestiges from visits of Anthobium, Nitidulids or perhaps yet other pollenfeeders of related behaviour. This paper is a preliminary report. In the papers 1950 the pollinator of O. lutea is with some hesitation named Andrena propinqua. Prof. Pittioni of Vienna has recently determined the specimens sent to him as belonging to A. freya Strand. [ABSTRACT FROM AUTHOR]

Copyright of Weed Research is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Weed Research is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Presents an investigation of the sequencing of 65 amino acid residues at the carboxyl-terminus. Use of methods such as enzymic or chemical cleavages of the peptide chain; Fractionation of peptides by Sephadex or Dowex column chromatography, paper elctrophoresis or chromatography.

In the previous paper, a metabolic relationship between a cytochrome oxidase deficiency and threonine biosynthesis in Saccharomyces cerevisiae was proposed. It has been found that high concentrations of threonine or its immediate precursors L-aspartate- β-semi-aldehyde or homoserine, are able to restore cytochrome oxidase synthesis in threonine auxotrophs, grown in the presence of glucose as a carbon source. On the other hand, these strains are able to synthesize cytochrome oxidase when the carbon source is ethanol or glycerol even without an excess of threonine. The results show that this phenomenon is concerned with the regulation of cytochrome oxidase synthesis. Different hypotheses are presented to explain the possible role of threonine in this regulation. One of them stresses the possible role of a differential auxotrophy for the cytoplasmic and the mitochondrial protein synthesis systems. [ABSTRACT FROM AUTHOR]

Previous work of several laboratories has shown that the two carbon atoms C-28 and C-29 of the ethyl or ethylidene side chains of phytosterols are introduced on a C-24 unsaturated side chain by two successive C-methylation steps. A scheme, based on previous work of Nes et al. and Goodwin et al., gives the various intermediates which can be formed by stabilisation of the intermediate carbonium ion (II). It was usually thought that ethylidene compounds such as (III) were the precursors of ethyl compounds such as (VIII) and this has been proved recently in the case of poriferasterol (IX) which contained four deuterium atoms when Ochromonas malhamensis was grown in presence of [Me-²H3] methionine [8]. In the present paper it is reported that the sterol of the slime mold Dictyostelium discoideum [Δ 22-stigmasten-3-Β-ol (Xa)] contains five deuterium atoms, when extracted from D. discoideum fed on cells of a methionine-less strain of E. coli grown in presence of [Me-²H3] methionine. The unsaturated sterol (Xa) is accompanied by the saturated sterol (XIa) which was not previously found in this organism. Mass spectrometry of the pentadeuterated sterols (Xa) and (XIa) seemed to show conclusively that all five deuterium atoms are located in the ethyl side chain [11], but it was thought necessary to confirm this conclusion by a detailed analysis of the side chain; thus, the sterol (Xa) was ozonised and part of the side chain isolated as a crystalline p-phenylphenacyl ester (XIIIa). Mass spectrometry of this compound and of a synthetic non-labelled (XIllb) and the corresponding monodeuterated derivative (XTIJc) confirms that all five deuterium atoms of the Dictyostelium sterol (Xa) are in the ethyl side chain. These results exclude an ethylidene compound (such as III) as a precursor of the sterol (Xa); they do not allow us to choose between other possible routes illustrated th the scheme. Our experiments also show that there is no hydrogen shift during the second methylation step. [ABSTRACT FROM AUTHOR]

In the previous paper [1] we proposed a mechanism for the reaction of pancreatic ribonuclease with nucleotide diesters. in which the kinetic constants k+1 and k-1 + k+2 are assigned to a base catalysed step for the formation, and a proton catalysed step by the conjugate acid for the breakdown, of an enzyme stabilized intermediate. In the hydrolysis reaction of the 2′,3′- cyclic diesters the rates depend on the structure of the catalysing base, and in particular on its polarisability. in addition to this effect, we found that, in the dinucleoside phosphate series, the rates increased up to three orders of magnitude, depending on the nature of the base of the second nucleoside [4]. According to our suggested mechanism I-VI the accelerated rates could be due to (a) the second base influencing the polarisability of the catalysing system by π-electron interactions between the stacked bases. This effect should be reflected in the enthalpy term and should parallel the hypochromicity of the dinucleoside-phosphates exactly: (b) pre-ordering of the reacting atoms (C-2-oxygen, 2′-OH-group and phosphorus) by the base stacking, which would be reflected in a lowering of the activation energy in the entropy term and should only roughly parallel the hypochromicity. To differentiate between these two possibilities we prepared the diesters IX -XXXIV, determined the hypochromic effect and also the values of km and k+2 at pH 7. There is only a partial correlation between k+3 values and the hypochromic effect. The k+2 values vary with the structure of the second nucleoside and show a particular dependence upon the nature of the link between base and phosphate group. Highest values are found with adenosine and deoxyadenosine. Elongating the ribose with mercaptoethanol (XIX) or substituting the relatively rigid ribofuranose ring with flexible n-hexyl-, pentyl- or butyl-chains (XX-XXIII appreciably reduces the hypochromicities and also the k+2, values, in the case of a propyl link (XXIII, XXIV( or in the analogously structured 3′-3′-dinucleosidephosphate XXV no hypochromic effect is found and the k+2 values are as low as that of 3′-cytidylic acid benzyl ester. A second nucleoside attached to the 5′ end of a substrate (XXXIII. XXXIV) does not result in an increase of the rate of diester hydrolysis at the 3′ end though there is a normal hypochromicity. Therefore a pre-ordering of the reacting atoms (demonstrable on models) appears to be the accelerating factor. A specific interaction between the second nucleoside and the enzyme being responsible for the pre-ordering effect can be excluded by either blocking or varying all the potential interaction sites. The concept of a pre-ordering in the substrate due to bass stacking agrees with the results from measurements of the temperature dependence of k+2 and calculations of the enthalpy (ΔH≠) and entropy (Δ,S≠) term in the activation energy of this step. When diesters with an exactly analogous structure of the intermediate II such as CpA (IX) and Cp-butyladenine (XXII) are compared, the differences are found in the entropy term only. Between the first and second step substrates such as CpA and 2′3′-Cp the differences are also found in the entropy term with a small factor in the enthalpy term. From a comparison of Up- and Cp-diesters it can be seen that due to the differences in the enthalpy term the Up-diesters should react 5–10 times faster than Cp-diesters, but that due to the differences in the entropy term Cp-diesters react 20 times faster than Up-diesters.… [ABSTRACT FROM AUTHOR]

Copyright of Revue Internationale du Travail is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revue Internationale du Travail is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revue Internationale du Travail is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revue Internationale du Travail is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revue Internationale du Travail is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Résumé: Le présent numéro spécial vise à alimenter la discussion sur la nécessité de renforcer le cadre de régulation des relations de travail individuelles en proposant une analyse de la segmentation juridique engendrée par les fonctions régulatrice, hiérarchisante et compensatrice du droit du travail. Dans cette introduction, les auteurs présentent les études régionales et thématiques qu'il contient et décrivent leurs propres travaux, menés grâce à une base de données originale, notamment leur méthode, leurs conclusions préliminaires et la typologie des familles de droit à laquelle ils parviennent. L'ensemble du recueil fournit des pistes pour l'élaboration et l'application de règles protégeant tous les travailleurs de la planète. [ABSTRACT FROM AUTHOR]

Résumé: Les auteurs résument les grandes conclusions de la recherche sur la relation entre droit du travail et genre. Ils distinguent différentes fonctions de la législation: créer des institutions du marché du travail, organiser leur fonctionnement, remédier à leurs effets pervers, les faire évoluer. Deux modèles, partiellement définis par le droit (et axés respectivement sur la relation de travail classique et sur l'emploi formel) induisent une segmentation sexuée, parfois renforcée, paradoxalement, par les dispositions introduites pour y remédier. Pour sortir de l'impasse, les auteurs recommandent d'évoluer vers des règles universelles, mais suffisamment souples pour répondre aux besoins de femmes et d'hommes aux profils divers. [ABSTRACT FROM AUTHOR]

Résumé: Les marchés du travail de l'Afrique subsaharienne se caractérisent par une répartition asymétrique des hommes et des femmes entre secteurs formel et informel, imputable à une segmentation juridique fondée sur la race et le genre héritée des régimes coloniaux qui régissaient, notamment, le travail. Comprendre la segmentation des marchés du travail dans les contextes postcoloniaux, ou tenter de la surmonter, suppose de rechercher dans les institutions coloniales les origines de la marchandisation du travail. Celle‐ci découle d'une norme coloniale du travail basée sur l'exploitation, centrée sur les travailleurs africains masculins au service d'employeurs européens et excluant ou marginalisant les femmes et le travail domestique. [ABSTRACT FROM AUTHOR]

Résumé: Les auteurs examinent l'effet du droit du travail sur la segmentation du marché du travail effective dans 22 pays européens entre 1991 et 2014. Après avoir isolé trois fonctions protectrices du droit du travail (fonctions régulatrice, hiérarchisante et compensatrice), ils associent statistiques descriptives et analyse multivariée pour faire ressortir l'effet de chacune sur l'emploi typique et atypique global, masculin et féminin. Ils observent qu'une dimension hiérarchisante affirmée, associée à une forte fonction régulatrice, favorise l'emploi typique masculin et l'emploi atypique féminin. Une législation très compensatrice, en principe destinée à protéger les femmes et autres groupes moins bien insérés, favorise paradoxalement l'emploi atypique masculin. [ABSTRACT FROM AUTHOR]

Résumé: L'auteur analyse les phénomènes d'exclusion et de hiérarchisation en matière de protection des travailleurs dans quatre pays d'Asie (Chine, Inde, Malaisie et Viet Nam), en reprenant l'approche de la segmentation juridique de Dingeldey et al. (2021), mais dans une perspective qualitative. Plusieurs facteurs distinguent ces pays de ceux du monde du Nord et expliquent les spécificités de leurs marchés du travail: le nombre relativement important des travailleurs exclus du champ d'application de la législation du travail; la terminologie juridique, difficilement transposable, et le contexte historique (le passé colonial contribuant à expliquer l'écart entre le cadre légal et la réalité du travail). [ABSTRACT FROM AUTHOR]

Résumé: Les auteurs analysent la façon dont le cadre du droit du travail s'est constitué dans les pays de la Communauté de développement de l'Afrique australe (SADC), en cherchant à faire apparaître les cas de segmentation juridique. En parallèle, ils donnent un aperçu des caractéristiques démographiques de l'économie informelle dans les pays en question. Ils concluent que, par les mécanismes qu'il met en œuvre dans la région, le droit du travail contribue dans une large mesure à la segmentation économique qu'on peut y observer, et ce alors même que les principes qu'il promeut ont été inscrits dans les constitutions des pays en question. [ABSTRACT FROM AUTHOR]

Résumé: Les plateformes de travail numériques ont souvent été présentées comme une solution au chômage engendré par la pandémie. Cependant, la crise a mis en lumière la vulnérabilité des collaborateurs des plateformes, notamment des travailleurs essentiels parmi eux. Les auteurs examinent le comportement de 191 plate‐formes de 43 pays pendant la pandémie pour savoir si celle‐ci a fait évoluer la branche. Sur la base de critères relatifs à l'équité au travail, ils repèrent certains progrès mais aussi des lacunes importantes en matière de protection et concluent à une précarisation du travail, alors même que les plateformes ont plutôt tiré profit de la crise. [ABSTRACT FROM AUTHOR]

Résumé: Les auteurs analysent les répercussions de la pandémie de COVID‐19 sur l'activité et le vécu des travailleurs de plateforme en Pologne et la réaction de cette main‐d'œuvre dans ces circonstances particulières. Ils observent que les fortes fluctuations de la demande ont exacerbé les distorsions propres à une relation de travail asymétrique, non régulée et atypique et repèrent plusieurs stratégies mobilisées par les travailleurs pour y remédier, en s'appuyant sur la typologie de Hirschman (défection, prise de parole et loyauté). Le choix entre ces stratégies dépend des ressources personnelles de l'individu, des moyens institutionnels auxquels il a accès et de son système de valeurs. [ABSTRACT FROM AUTHOR]

Résumé: L'autrice mesure la ségrégation professionnelle selon le statut migratoire en Europe, en analysant la situation séparément pour les femmes et pour les hommes. Les données proviennent des vagues 2005–2019 de l'enquête EFT de l'Union européenne. La répartition est plus ségrégative pour les femmes, par rapport aux hommes, pour les immigrés de la première génération, par rapport à la deuxième, et dans les pays d'Europe méridionale et orientale, par rapport à l'Europe septentrionale et occidentale. Une analyse contrefactuelle montre que les caractéristiques des migrants influent peu sur les écarts géographiques. Les institutions, les politiques d'intégration et les systèmes de valeur pourraient jouer un rôle important. [ABSTRACT FROM AUTHOR]

Résumé: Des études ont montré que les plateformes de travail numériques avaient créé des possibilités de revenu dans les pays en développement. L'apport d'autres outils en ligne permettant aux travailleurs informels d'accéder à l'emploi sans in‐termédiaire est moins documenté. Sur la base d'observations ethnographiques en ligne et d'entretiens avec deux groupes de travailleurs informels indonésiens (des chauffeurs de motos‐taxis et des travailleurs domestiques), l'autrice montre que les médias sociaux ont facilité la recherche d'emploi pendant la pandémie, quand les plateformes ont fermé, mais uniquement pour ceux qui pouvaient s'appuyer sur un réseau. En outre, les algorithmes continuent de dicter leur loi. [ABSTRACT FROM AUTHOR]

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Copyright of Revue Internationale de Securite Sociale is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revue Internationale de Securite Sociale is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revue Internationale de Securite Sociale is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revue Internationale de Securite Sociale is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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Copyright of Canadian Geographer is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This paper gives an overview of the treatment of Human African Trypanosomiasis from the early 20th century until today. [ABSTRACT FROM AUTHOR]

This paper, written before 13 March 1977 describes the issues at stake in the municipal elections in France—considering the general political situation, the evolutions in the right and left coalitions and the more specific consequences to be expected on urban policies. [ABSTRACT FROM AUTHOR]

This paper provides an existence proof of an oligopolistic equilibrium which solves some difficulties in the construction of a consistent descriptive model of imperfect competition. [ABSTRACT FROM AUTHOR]

Copyright of Physiologia Plantarum is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revue Internationale du Travail is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revue Internationale du Travail is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revue Internationale du Travail is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revue Internationale du Travail is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revue Internationale du Travail is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revue Internationale du Travail is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revue Internationale du Travail is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revue Internationale du Travail is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)