R.P. Martini de Esparza Artieda ... theologi Societ. Jesu, Cursus theologicus in decem libros, & duos tomos distributus ... : tomus primus, continens primam partem, & primam secundae D. Thomae.

Mode of access: Internet.

Bibliotheca magna rabbinica de scriptoribus & scriptis rabbinicis ordine alphabetico hebraicè & latinè digestis : pars quarta, complectens reliquas post ... duodecim alphabetici literas ..., in qua complures identidem interferuntur dissertationes & digressiones / auctore ... D. Iulio Bartoloccio de Celleno Cong. S. Bernardi Ord. Cisterc... ; post eius obitum absoluta, aucta & in lucem edita a D. Carolo Ioseph Imbonato ... eiusdem Congregationis ... praeter Indices ... additur quadruplex Index uniuersalis ... ; accedit tomus alter nempè bibliotheca latino-hebraica siue de scriptoribus latinis ... additis obseruationibus criticis & philologico-historicis ... opera et studio eiusdem D. Caroli Ioseph Imbonati ...

Mode of access: Internet.

Tractatus de legibus ac Deo legislatore, : in decem libros distributus. /

Includes indexes.

Geography of the Soviet Union.

Includes bibliographies.

Na 1 Nachlass Max Horkheimer, 802 - "Dialektik der Aufklärung" von Max Horkheimer und Theodor W. Adorno (p. XI 6.3 - XI 6.42)

3. Aus der "Dialektik der Aufklärung"; Kapitel: "Juliette oder Aufklärung und Moral". Typoskript mit dem Titel "Aufklärung und Rigorismus", mit handschriftlichen Korrekturen, 52 Blatt (2 Exemplare); 4. Aus der "Dialektik der Aufklärung"; Kapitel: "Kulturindustrie". Typoskript mit dem Titel "Das Schema der Massenkultur":; 4a) Typoskript mit handschriftlichen Korrekturen, 67 Blatt; 4b) Typoskript mit eigenen Korrekturen, 106 Blatt; 5. - 110. Gedruckte und ungedruckte Aufzeichnungen und Entwürfe zur "Dialektik der Aufklärung: Sammlungen A, B, C, D, die teilweise identisch sind; 5. - 42. Sammlung A: "Aphorismen"; 5. "Zum Problem der Bedürfnisse". Typoskript, 5 Blatt; 6. "Mensch und Tier". Typoskript mit eigenen Korrekturen, 12 Blatt; 7. "Propaganda". Typoskript, 2 Blatt; 8. "Straftheorie". Typoskript mit eigenen Korrekturen, 3 Blatt; 9. "Dichtung und Moral". Typoskript mit eigenen Korrekturen, 5 Blatt; 10. "Zur Genese der Dummheit". Typoskript, 3 Blatt; 11. "Interesse am Körper". Typoskript mit eigenen Korrekturen, 6 Blatt; 12. "Philosophie und Arbeitsteilung". Typoskript, 3 Blatt; 13. "Widersprüche". Typoskript, 4 Blatt; 14. "Geschichte der amerikanischen Arbeiterschaft". Typoskript, 1 Blatt; 15. "Feind". Typoskript, 2 Blatt; 16. "Gezeichnet". Typoskript mit eigenen Korrekturen, 2 Blatt; 17. "Erkenntnis und Sprache". Typoskript, 1 Blatt; 18. "Unmöglichkeit der Dichtung". Typoskript, 1 Blatt; 19. "Erbsünde und Kopula". Typoskript, 2 Blatt; 20. "Die Einseitigkeit der Negativität". Typoskript, 2 Blatt [= "Für Voltaire" in der "Dialektik der Aufklärung"]; 21. "Klassifikation". Typoskript mit eigenen Ergänzungen, 1 Blatt; 22. "Jüdischer Charakter". Typoskript mit eigenen Korrekturen, 1 Blatt; 23. "Lawine". Typoskript mit eigenen Korrekturen, 2 Blatt; 24. "Solidarität". Typoskript mit eigenen Korrekturen, 2 Blatt; 25. "Bewußtsein". Typoskript, 1 Blatt; 26. "Gegen Bescheidwissen". Typoskript, 1 Blatt; 27. "Der Gedanke". Typoskript, 1 Blatt; 28. "Quand-même". Typoskript, 2 Blatt; 29. "Leeres Erschrecken". Typoskript mit eigenen Korrekturen, 2 Blatt; 30. "Haupt- und Nebensatz". Typoskript, 3 Blatt; 31. "Verwandlung der Idee in Herrschaft". Typoskript mit eigenen Korrekturen, 5 Blatt; 32. "Isolierung durch Verkehr". Typoskript, 1 Blatt; 33. "Kampf und Gewaltlosigkeit". Typoskript, 6 Blatt; 34. "Zwei Welten". Typoskript, 2 Blatt; 35. "Zur Theorie der Gespenster". Typoskript, 1 Blatt; 36. "Notiz" [= "Umschlag der idealistischen Dialektik"]. Typoskript, 1 Blatt; 37. "Massengesellschaft". Typoskript, 1 Blatt; 38. "Tierpsychologie". Typoskript, 1 Blatt; 39. "Denkmale der Humanität". Typoskript mit eigenen Korrekturen, 1 Blatt; 40. "Physiognomik". Typoskript mit eigenen Korrekturen, 1 Blatt; 41. "Die Rackets und der Geist". Typoskript mit eigenen Korrekturen, 7 Blatt; 42. "Altmodisches Problem". Typoskript mit eigenen Korrekturen, 2 Blatt;

Na 1 Nachlass Max Horkheimer, 805 - Verschiedene Essays, Manuskripte, Entwürfe und Notizen u.a. aus dem Umkreis / bzgl. "Dialektik der Aufklärung" (p. XI 6a - XI 16.1-17)

"Notes. Verschiedene Essays"; Diese Mappe enthielt ursprünglich Fassungen von Aphorismen aus dem Umkreis von "Dialektik der Aufklärung", die den entsprechenden Stücken zugeordnet wurden; außerdem:; 1. Auszüge aus Thomas Hobbes, Leviathan; englisch, Anfang und Schluss fehlen. Typoskript, 5 Blatt; 2. Das Allgemeine nicht tiefer als das Besondere [= "Klassifikation" in der 'Dialektik der Aufklärung']. Typoskript, 1 Blatt; 3. Müßiggang als Merkmal vorbürgerlichen und nachbürgerlichen Zeitalters [GS 12, S. 315]. Typoskript, 1 Blatt; Thesen über Antisemitismus; Zumindest teilweise Vorarbeiten zum Kapitel "Elemente des Antisemitismus" der 'Dialektik der Aufklärung', 1943:; 1. Teilstück aus Abschnitt IV der "Elemente". Typoskript mit eigenen Korrekturen und Manuskript, 4 Blatt; 2. Teilstück aus Abschnitt V der "Elemente". Typoskript, 2 Blatt; 3. Antisemitismus als rationalisierte Ideosynkrasie. Typoskript mit eigenen Korrekturen, 1 Blatt; 4. Mimikry und Selbsterhaltung, Teilstücke:; 4a) Typoskript mit eigenen Korrekturen, 1 Blatt; 4b) Typoskript mit eigenen Korrekturen, 2 Blatt; 4c) Typoskript mit eigenen Korrekturen, 1 Blatt; 5. Technokratie und Faschismus. Teilstück, Typoskript, 1 Blatt; 6. Antisemitismus als verschobener Haß gegen kapitalistische Ausbeutung; Protokoll einer Diskussion zwischen Max Horkheimer und Theodor W. Adorno. Typoskript, 2 Blatt; 7. Über antisemitische Ideosynkrasie; Protokoll einer Diskussion zwischen Max Horkheimer und Theodor W. Adorno zur "Dialektik der Aufklärung", 'Elemte des Antisemitismus', These 4. Fragment, Typoskript, 1 Blatt; 8. Über Mimesis; Protokoll einer Diskussion zwischen Max Horkheimer und Theodor W. Adorno [GS 12, S. 587 ff.]. Typoskript, 3 Blatt; 9. - 10. Über Probleme der Erkenntnis des Antisemitismus in der Tradition der Humanwissenschaften. Typoskript, englisch, mit eigenen Korrekturen, 2 Blatt; 11. Völkischer Antisemitismus; Korrekturblatt. Manuskript, 4 Blatt; 12. Eigene und handschriftliche Notizen, 22 Blatt; 13. Exzerpte aus Werken Friedrich Nietzsches. Typoskript, 3 Blatt; 14. Exzerpt aus Gregorovius: "Wanderjahre in Italien". Typoskript, 1 Blatt; 15. Adorno, Theodor W.: Über antisemitische Propaganda. Typoskript mit eigenen Korrekturen, 6 Blatt; 16. Adorno, Theodor W.: Eigene Notizen, 3 Blatt; 17. 1 Zeitungsausschnitt, 1 Blatt; Manuskripte und Entwürfe als Vorarbeiten oder aus dem Umkreis der "Dialektik der Aufklärung":; 1. Über das Verhältnis von Naturbeherrschung und gesellschaftlicher Herrschaft; [von Theodor W. Adorno ?]. Entwurf, Typoskript, 3 Blatt; 2. Theodor W. Adorno [?]: Über Mythologie und Aufklärung. Typoskript mit eigenen Korrekturen, 13 Blatt; 3. Über das Verhältnis von Ökonomie und Politik in Liberalismus und Spätkapitalismus [GS 12, S. 316 - 318]. Typoskript mit eigenen Korrekturen, 3 Blatt; 4. Über den Begriff des Geistes in der materialistischen Aufklärung: Element der Macht. Teilstück, Typoskript und Manuskript, 1 Blatt; 5. Eigene Notizen u.a. über: Verhältnis von Geist und Natur, Verhältnis der Freudschen Methode zum Positivismus; Entwurf des Romans über Neville Chamberlain; 1942:; 1. "Grober Umriß der Handlung". Typoskript, 12 Blatt; 2. Anfang des Romans [GS 12, S. 329 - 341]:; 2a) Typoskript mit eigenen Korrekturen, 3 Blatt und eigene Notiz, 1 Blatt; 2b) Typoskript mit eigenen Korrekturen, 2 Blatt; 2c) Typoskript mit eigenen Korrekturen, 1 Blatt; 3. Exzerpte aus Schriften über Chamberlain, gesammelt von Herbert Marcuse. Typoskript, 8 Blatt, mit einer eigenen Notiz von Friedrich Pollock für Max Horkheimer, 1 Blatt; 4. Abschriften aus Zeitungsartikeln über Chamberlain. Typoskript, 22 Blatt; 5. Bibliotheks-Leihscheine und Literaturangaben. Handschriftliche Notizen, 10 Blatt; Über Psychoanalyse; um 1942. Fragment, Typoskript mit eigenen Korrekturen, 4 Blatt; Über Rackets, ihre Bedeutung von der Antike bis zum Kapitalismus; Zu einer Theorie des Proletariats; 1942:; 1. Notizen zum Programm des Buches, 30.8.1942. 2 Blatt; 2. Exzerpte aus Schriften zur Geschichte der Rackets (von Theodor W. Adorno). Typroskript, 30 Blatt; "Betrachtungen zum Curfew" [GS 5, S. 351 - 353]; um 1942:; a) Typoskript mit eigenen Korrekturen, 3 Blatt; b) Typoskript mit eigenen Korrekturen, 3 Blatt; c) Teilstück, Typoskript mit eigenen Korrekturen, 2 Blatt; d) Teilstück, Typoskript mit eigenen Korrekturen, 2 Blatt; e) Typoskript-Manuskript, 2 Blatt; "Sociology of Art" [GS 5, S. 360 - 363], 1942/1943; veröffentlicht in "Encyclopedia of the Arts", New York, 1946:; a) Typoskript, 4 Blatt; b) Photokopie des Drucks, 2 Blatt; Adorno, Theodor W.: Über Paul Tillich, "Man and Society in Religious Socialism"; Entwurf eines Briefs, 16.2.1944. Typoskript mit handschriftlichen Korrekturen von Theodor W. Adorno. 26 Blatt; "The Crisis of the Family", aus Max Horkheimers "Autorität und Familie. Allgemeiner Teil" (Paris 1936) zusammengestellt und übersetzt von Norbert Guterman (S. 63-76 und 49 - 63), 1945 ? Typoskript, 29 Blatt; New Yorker Notizen [II], 1945:; 1. "Dialektik - Mittelwek"; "Notizen zur Dialektik" [GS 12, S. 297 - 302]. Typoskript mit eigenen Korrekturen, 8 Blatt; 2. "Ritterlichkeit" [GS 12, S. 225 - 227]. Typoskript mit eigenen Korrekturen, 4 Blatt; 3. "Soziologische Unterscheidungen" [GS 12, S. 302 - 303]. Typoskript, 2 Blatt; 4. "Vertragstheorie". a) Typoskript, 6 Blatt. b) Typoskript mit eigenen Korrekturen, 7 Blatt; 5. "Bürgerliche Welt" [GS 12, S. 227 - 232]. Typoskript, 8 Blatt; 6. "Enge des Herzens" [GS 12, S. 232 - 234]. Typoskript, 2 Blatt; 7. "Unabänderlichkeit?" [GS 12, S. 234 - 237]. Typoskript mit eigenen Korrekturen, 6 Blatt; 8. "Die Juden und der Eid" [GS 12, S. 303 - 305]:; 8a) Typoskript mit eigenen Korrekturen, 3 Blatt; 8b) Typoskript mit handschriftlichen Korrekturen, 3 Blatt; 8c) Typoskript mit eigenen Korrekturen, 2 Blatt; 9. "Das Rationale und das Irrationale" [GS 12, S. 306]. Typoskript, 1 Blatt; 10. "Zur Dialektik" - "Zur Architektur" - "Zum Commerce" - "Text zu einer Illustration aus 'La Femme 100 tetes'" [GS 12, S. 306 - 308]. Typoskript, 2 Blatt; 11. "On Vivisection" = Brief an Ned R. Healy, New York, 22.3.1945. Typoskript, 2 Blatt; 12. "Der 'Schrecken' in der französischen Revolution" [GS 12, S. 238 - 239]. Typoskript mit eigenen Korrekturen, 3 Blatt; 13. "Autorität und Vernunft" [GS 12, S. 239 - 243]:; 13a) Typoskript mit eigenen Korrekturen, 6 Blatt; 13b) Typoskript mit dem Titel "Faschismus und gesellschaftliche Ordnung", 6 Blatt; 13c) Typoskript mit eigenen Korrekturen, 7 Blatt; 14. "Zum Gottesbegriff":; 14a) Typoskript, 4 Blatt; 14b) Typoskript mit eigenen Korrekturen, 4 Blatt; 15. "Der Mensch verändert sich in der Geschichte" [GS 12, S. 244 - 246]:; 15a) Typoskript, 3 Blatt; 15b) Typoskript, 3 Blatt; 16. "Zur materialistischen Geschichtstheorie" [GS 12, S. 246 - 247]. Typoskript, 2 Blatt; 17. "Die schlechten Elemente des Liberalismus" [GS 12, S. 247 - 249]:; 17a) Typoskript, 3 Blatt; 17b) Typoskript mit eigenen Korrekturen, 3 Blatt;

Morphological changes during akinete germination in Cylindrospermopsis raciborskii (Nostocales, Cyanobacteria)

The occurrence of the cyanobacterium Cylindrospermopsis raciborskii (Woloszynska) Seenayya and Subba Raju is a global water quality issue. The misidentification of C. raciborskii in the past is a major concern for water quality users, considering the reported cases of human and livestock poisonings associated with the cyanobacterium. Many of the available taxonomic descriptions for this species provide little or no detail of the morphology of early developmental phases that may assist with identification. Therefore, typifying the morphological changes throughout the entire life cycle for such a species requires urgent attention. In this study, five distinct morphological phases identified using a new culturing technique are reported for the process of akinete germination in C. raciborskii. Before the terminal emergence of three to four cell germlings through a ruptured akinete envelope (phase 3), mature akinetes (phase 1) elongated and the endospore separated from the akinete envelope (phase 2). After the association with the envelope was lost, four-cell germlings (phase 4a) matured into young trichomes of more than four cells (phase 4b). Throughout the process of germination, internal granular structures decreased in size and were irregular in shape in germlings and young trichomes. The culturing technique, which used a Sedgwick-Rafter cell, was successful in its application but was limiting in that the development of young trichomes after phase 4b could not be monitored.

Nematocidal thiocyanatins from a southern Australian marine sponge Oceanapia sp.

Investigations of a southern Australian marine sponge, Oceanapia sp., have yielded two new methyl branched bisthiocyanates, thiocyanatins D-1 (3a) and D-2 (3b), along with two new thiocarbamate thiocyanates, thiocyanatins E-l (4a) and E-2 (4b). The new thiocyanatins belong to a rare class of bioactive marine metabolite previously only represented by thiocyanatins A-C (1, 2a/b). Structures were assigned on the basis of detailed spectroscopic analysis, with comparisons to the known bisthiocyanate thiocyanatin A (1) and synthetic model compounds (5-7). The thiocyanatins exhibit potent nematocidal activity, and preliminary structure-activity relationship investigations have confirmed key characteristics of the thiocyanatin pharmacophore.

Synthesis and biological evaluation of nonpeptide mimetics of co-conotoxin GVIA

A benzothiazole-derived compound (4a) designed to mimic the C-alpha-C-beta bond vectors and terminal functionalities of Lys2, TyrI3 and Arg17 in omega-conotoxin GVIA was synthesised, together with analogues (4b-d), which had each side-chain mimic systematically truncated or eliminated. The affinity of these compounds for rat brain N-type and P/Q-type voltage gated calcium channels (VGCCs) was determined. In terms of N-type channel affinity and selectivity, two of these compounds (4a and 4d) were found to be highly promising, first generation mimetics of omega-conotoxin. The fully functionalised mimetic (4a) showed low PM binding affinity to N-type VGCCs (IC50 = 1.9 muM) and greater than 20-fold selectivity for this channel sub-type over P/Q-type VGCCs, whereas the mimetic in which the guanidine-type side chain was truncated back to an amine (4d, IC50 = 4.1 muM) showed a greater than 25-fold selectivity for the N-type channel. (C) 2004 Elsevier Ltd. All rights reserved.

Differential expression of the NMDA NR2B receptor subunit in motoneuron populations susceptible and resistant to amyotrophic lateral sclerosis

We have compared the expression pattern of NMDA receptor subunits (NR1 and NR2A-D)and NRI splice variants (NR1-1a/1b,-2a/2b,-3a/3b,4a/4b) in motor neuron populations from adult Wistar rats that are vulnerable (hypoglossal, XII) or resistant (oculomotor, III) to death in amyotrophic lateral sclerosis (ALS). The major finding was higher levels of expression of the NR2B subunit in the hypoglossal nucleus. Quantitative real-time PCR showed that NR1 was expressed at a greater level than any of the NR2 subunits (> 15 fold greater, P

Completion of the genome sequence of Lettuce necrotic yellows virus, type species of the genus Cytorhabdovirus

We completed the genome sequence of Lettuce necrotic yellows virus (LNYV) by determining the nucleotide sequences of the 4a (putative phosphoprotein), 4b, M (matrix protein), G (glycoprotein) and L (polymerase) genes. The genome consists of 12,807 nucleotides and encodes six genes in the order 3' leader-N-4a(P)-4b-M-G-L-5' trailer. Sequences were derived from clones of a cDNA library from LNYV genomic RNA and from fragments amplified using reverse transcription-polymerase chain reaction. The 4a protein has a low isoelectric point characteristic for rhabdovirus phosphoproteins. The 4b protein has significant sequence similarities with the movement proteins of capillo- and trichoviruses and may be involved in cell-to-cell movement. The putative G protein sequence contains a predicted 25 amino acids signal peptide and endopeptidase cleavage site, three predicted glycosylation sites and a putative transmembrane domain. The deduced L protein sequence shows similarities with the L proteins of other plant rhabdoviruses and contains polymerase module motifs characteristic for RNA-dependent RNA polymerases of negative-strand RNA viruses. Phylogenetic analysis of this motif among rhabdoviruses placed LNYV in a group with other sequenced cytorhabdoviruses, most closely related to Strawberry crinkle virus. (c) 2005 Elsevier B.V. All rights reserved.

Regulated Cleavages at the West Nile Virus NS4A-2K-NS4B Junctions Play a Major Role in Rearranging Cytoplasmic Membranes and Golgi Trafficking of the NS4A Protein

A common feature associated with the replication of most RNA viruses is the formation of a unique membrane environment encapsulating the viral replication complex. For their part, flaviviruses are no exception, whereupon infection causes a dramatic rearrangement and induction of unique membrane structures within the cytoplasm of infected cells. These virus-induced membranes, termed paracrystalline arrays, convoluted membranes, and vesicle packets, all appear to have specific functions during replication and are derived from different organelles within the host cell. The aim of this study was to identify which protein(s) specified by the Australian strain of West Nile virus, Kunjin virus (KUNV), are responsible for the dramatic membrane alterations observed during infection. Thus, we have shown using immunolabeling of ultrathin cryosections of transfected cells that expression of the KUNV polyprotein intermediates NS4A-4B and NS213-34A, as well as that of individual NS4A proteins with and without the C-terminal transmembrane domain 2K, resulted in different degrees of rearrangement of cytoplasmic membranes. The formation of the membrane structures characteristic for virus infection required coexpression of an NS4A-NS4B cassette with the viral protease NS2B-3pro which was shown to be essential for the release of the individual NS4A and NS4B proteins. Individual expression of NS4A protein retaining the C-terminal transmembrane domain 2K resulted in the induction of membrane rearrangements most resembling virus-induced structures, while removal of the 2K domain led to a less profound membrane rearrangement but resulted in the redistribution of the NS4A protein to the Golgi apparatus. The results show that cleavage of the KUNV polyprotein NS4A-4B by the viral protease is the key initiation event in the induction of membrane rearrangement and that the NS4A protein intermediate containing the uncleaved C-terminal transmembrane domain plays an essential role in these membrane rearrangements.

Characterisation of the signalment, clinical and survival characteristics of 41 cats with mast cell neoplasia

Mast cell tumours (MCTs) are relatively common tumours of cats, and are the second most common cutaneous tumours in cats in the USA. While the primary splenic form of the disease is far less common, it is usually associated with more severe clinical signs. Signalment, clinical and survival characteristics of mast cell neoplasia were characterised in 41 cats. The most common tumour location was cutaneous/ subcutaneous head and trunk. Stage la was the most common tumour stage at first diagnosis (n = 20), followed by stage 4 (both stage 4a and stage 4b; n = 10). Of 22 cats that underwent excisional biopsy, mast cell neoplasia recurred in four cats during the study period. Three of the 41 cats presented with simultaneous cutaneous and either splenic or lymph node tumours. A comparison between cats with only cutaneous tumours (n = 30) and those with tumours involving the spleen or lymph nodes (n = 11) showed longer survival times for the cutaneous-only group (P = 0.031). Twelve of the 41 cats died of mast cell neoplasia during the study period. When a subgroup of cats with only cutaneous tumours (no lymph node or visceral involvement) were divided according to whether there were multiple (five or more) tumours (n = 6) or a single tumour (n = 19), cats with single tumours survived longer than those with multiple tumours (P = 0.001). Solitary cutaneous feline MCTs without spread to the lymph nodes usually manifest as benign disease with a relatively protracted course. However, multiple cutaneous tumours, recurrent tumours and primary splenic disease should receive a guarded prognosis due to the relatively short median survival times associated with these forms of the disease. (C) 2006 ESFM and AAFR Published by Elsevier Ltd. All rights reserved.

Cytotoxicity of 3,4-dihalogenated 2(5H)-furanones

Mucohalogen acids have been used for the preparation of a variety of 3,4-clihalogenated 2(5H)-furanones. In one synthetic step the carbarnates 2a-c and the pseudoanhydrides 4a-e were prepared using isocyanates and acid anhydrides. A series of 5-alkoxylated 3,4-dichloro-2(5H)-furanones 5a-o have been synthesized with a wide range of lipophilicity, using the hydroxy-form of mucohalogen acids 1a and 1b. The 5-allyl-3,4-dichloro-2(5H)-furanone 5f was derived into the dihydro-isoxazol 6 and the oxirane 7. The methyl ester 5a was converted with ammonia into the tetramic acid chloride 11. The pseudo acid chloride 3 was reacted further into the bis aziricline 8. Reduction of the mucochloric acid 1a furnished the trichlorofuranone 3. The cytotoxicity of these simple and bis-cyclic butenolides have been evaluated in tissue culture on MAC13 and MAC16 cancer cell lines using the MTT cytotoxicity assay. The ester 5g, the acetate 4b and the carbamate 2b displayed a cytotoxicity in the low micromolar range. Further, an IC50 (50% inhibitory concentration) of 50 nM and 30 nm was determined forthe epoxide 7 and the aziridine 18. © 2004 The Authors Recieved.

Build-up and resetting of auditory stream segregation in quiet and in complex-tone backgrounds

Thirteen experiments investigated the dynamics of stream segregation. Experiments 1-6b used a similar method, where a same-frequency induction sequence (usually 10 repetitions of an identical pure tone) promoted segregation in a subsequent, briefer test sequence (of alternating low- and high-frequency tones). Experiments 1-2 measured streaming using a direct report of perception and a temporal-discrimination task, respectively. Creating a single deviant by altering the final inducer (e.g. in level or replacement with silence) reduced segregation, often substantially. As the prior inducers remained unaltered, it is proposed that the single change actively reset build-up. The extent of resetting varied gradually with the size of a frequency change, once noticeable (experiments 3a-3b). By manipulating the serial position of a change, experiments 4a-4b demonstrated that resetting only occurred when the final inducer was replaced with silence, as build-up is very rapid during a same-frequency induction sequence. Therefore, the observed resetting cannot be explained by fewer inducers being presented. Experiment 5 showed that resetting caused by a single deviant did not increase when prior inducers were made unpredictable in frequency (four-semitone range). Experiments 6a-6b demonstrated that actual and perceived continuity have a similar effect on subsequent streaming judgements promoting either integration or segregation, depending on listening context. Experiment 7 found that same-frequency inducers were considerably more effective at promoting segregation than an alternating-frequency inducer, and that a trend for deviant-tone resetting was only apparent for the same-frequency case. Using temporal-order judgments, experiments 8-9 demonstrated the stream segregation of pure-tone-like percepts, evoked by sudden changes in amplitude or interaural time difference for individual components of a complex tone, Active resetting was observed when a deviant was inserted into a sequence of these percepts (Experiment 10). Overall, these experiments offer new insight into the segregation-promotIng effect of induction sequences, and the factors which can reset this effect.