Sigmund Freud: Conflict and Culture

Sigmund Freud: Conflict and Culture. The Library of Congress, Washington, D.C., October 15, 1998-January 16, 1999; The Jewish Museum, New York, New York, April 18-September 9. 1999, review venue; Freud Museum, Vienna, Austria. October 21, 1999-February 6. 2000; Skirball Cultural Center, Los Angeles. California. April 4-July 25, 2000.
Freud: Conflict and Culture. Essays on His Life, Work and Legacy. Michael S. Roth. ed. New York: Alfred Knopf, 1998. 273 pp.     

Genomics and the renaissance of generalism

A meeting report of the sessions on human, eukaryotic and bacterial genome sequencing at the American Society for Microbiology and Institut Pasteur joint conference: Genomes 2000 International Conference on Microbial and Model Genomes, Paris, April 11-15, 2000     

Drug-resistant parasites and aggregated infection – early-season dynamics

We investigate the effect of spatial aggregation in the infection dynamics of nematode parasites in ruminants. We show that a high degree of spatial aggregation is likely to lead to a dramatically enhanced rate of invasion by drug-resistant strains. Received: 13 December 1999 / Revised version: 3 April 2000 / Published online: 4 October 2000     

The effects of temperature, altitude and latitude on the arrival and departure dates of the swallow Hirundo rustica in the Slovak Republic

The (barn) swallow Hirundo rustica is a traditional harbinger of spring in many countries of the Northern Hemisphere. This paper uses information on the arrival and departure dates of the swallow in the Slovak Republic for the 30 years 1961–1985 and 1996–2000. Records were taken at 19 locations throughout the Republic representing an altitude range from 105 m to 760 m. Monthly temperature data were constructed from six meteorological stations. With the use of regression techniques, trends towards later arrival, earlier departure and the effects of latitude, altitude and temperature are all apparent. Received: 25 October 2000 / Revised: 23 April 2001 / Accepted: 23 April 2001     

Erratum

New Phytologist 147 (2000), 73–85
In the July 2000 issue of New Phytologist , we published the research paper entitled 'Dynamics of root systems in native grasslands: effects of elevated atmospheric CO₂' by J. A. Arnone III, J. G. Zaller, E. M. Spehn, P. A. Niklaus, C. E. Wells and C. Körner. Since its publication, it has come to our attention that there are two important errors. In Table 1, for alpine grassland (Switzerland, 2480 m) in year 2 (cool), the observed soil depth should be given as 0–10 cm (as originally printed there is no soil depth given). In Table 2, the period covered should be 28 April 1994 to 6 April 1995, not 28 April 1994 to 6 April 1996, as erroneously stated.
We apologize to the authors and to our readers for these mistakes.     

An answer to a complex problem: cloning the mouse t-complex responder

The t-complex is maintained in wild mouse populations by its high transmission (up to 99%) from heterozygous males and provides an example of ``meiotic drive'. Its molecular basis has remained obscure despite long and intensive study. In a major advance, the t-complex responder gene, thought to be the key gene on which several distorters act, has now been cloned. Received: 14 April 2000 / Accepted: 4 May 2000     

Energetics of Anaerobic Degradation Pathways of Chlorinated Aliphatic Compounds

Abstract This minireview explores the energetics of the (anaerobic) oxidative and fermentative degradation of halogenated ethenes and ethanes. It is shown that these pathways are viable alternatives to the traditional routes that start with one or more reductive dechlorination steps. In contrast to reductive dehalogenation, oxidative and fermentative degradation pathways do not require an external source of reducing equivalents. This suggests that organisms that use these pathways are most likely to be found at high redox potentials, i.e, under conditions where competition for reducing equivalents is great. Received: 10 February 2000; Accepted: 6 April 2000; Online Publication: 13 June 2000     

Growth of Photorhabdus luminescens in batch and glucose fed-batch culture

Photorhabdus luminescens, a bacterial symbiont of entomopathogenic biocontrol nematodes, was grown in batch and glucose fed-batch culture. The cell density, bioluminescence, production of antibiotic substances, number of cells with inclusion bodies, glucose concentration and oxygen uptake rate were recorded. The addition of 12.4 g l⁻¹ glucose prolonged the growth, and the yield almost doubled, from 6.85 g l⁻¹ to 12.45 g l⁻¹ dry mass. The production of antibiotic substances increased by 140%. Bioluminescence was higher in the batch culture. A shift of P. luminescens to phase II variants was not detected. Received: 21 January 2000 / Received revision: 3 April 2000 / Accepted: 7 April 2000     

Hair in African Art and Culture

Hair in African Art and Culture. The Museum for African Art, New York, February 9–May 28, 2000 (review venue); Apex Museum, Atlanta, July–September 2000; Cantor Center for Visual Arts, Stanford University, Palo Alto, California, October–December 2000; Museum of African American History, Detroit, January–April 2001; California African American Museum, Los Angeles, May–August 2001.
Hair in African Art and Culture. Roy Sieber and Frank Herreman. eds. New York: The Museum for African Art; Munich, London, New York: Prestel, 2000. 192 pp.     

Enhanced production of saikosaponins by root culture of Bupleurum falcatum L. using two-step control of sugar concentration

 The effect of sugar concentration on the production of saikosaponins was investigated using a root culture of Bupleurum falcatum L. The formation of the lateral roots, which were induced in the presence of indolebutyric acid, was suppressed as the sugar concentration was increased. After the lateral root tips had emerged from the inoculated roots, however, high concentrations of sugar showed no inhibitory effect on the development of the lateral roots. A two-step culture, with 1% sucrose at the beginning of the culture and addition of 6% sucrose at 14 days, when lateral roots have emerged, greatly improved the productivity, affording 0.8 g/l of saikosaponin-a and -d. Received: 28 October 1999 / Revision received: 19 April 2000 / Accepted: 27 April 2000     

War, mental disorder and suicide

War as a human disaster of major significance has led to an increase in the number of suicides committed by people suffering from mental disorders. Considering the results of similar research, we were particularly interested in the effect that war has on the incidence of suicide among of people with mental disorders. The research included 16,362 patients with mental disorders, treated at the Clinic for Psychiatry at the Clinical Hospital Split during the nine-year timeframe which were divided into pre-war (April 6th 1988- April 7rh 1991), wartime (April 6th 1991 -April 7rh 1994) and post-war (April 6th 1997 - April 7th 2000) periods. We studied the effects of how wartime events upon people with mental disorders in terms of their suicide rates, taking into account gender, age group, and the diagnosis under which they were treated. In our research, we found a statistically significant difference in suicide incidence between three observed periods (prewar April 6th 1988 April 7th 1991; wartime April 6th 1991 -April 7th 1994; and postwar April 6th 1997 -April 7th 2000) with the incidence being the highest during the wartime period (chi2 =9.98: p=0.007). Out of 16,362 patients treated at the clinic during the observed timeframe, a total of 78 people committed suicide. Twenty-two patients committed suicide during the first three year pre-war period; 36, during the three year wartime period; and 20, during the third three year post-war period. With this research we intended to offer a better understanding of the complexity of the suicide problem of mental patients as a phenomenon.     

Periodical cicadas

The evolution of periodicity and synchronicity of magical cicadas is studied by means of mathematical models. Received: 28 January 1999 / Revised version: 4 November 1999 / Published online: 3 April 2000     

First description of the disease by Conidiobolus osmodes on Tipula paludosa larvae with the report of a natural epizootic

A new fungal pathogen of Tipula paludosa (Tipulidae: Diptera) larvae, Conidiobolus osmodes (Ancylistaceae: Entomophthorales), was found during a survey of tipulid larval pathogens in Northumbria and Cumbria in England in 1997-1999. The fungus caused an epizootic in a population at Close House during autumn 1999 and spring 2000 with prevalence rising fourfold reaching about 40% in April 2000. The disease development was presented and the fungus was described from naturally infected larvae and artificial cultures.     

Integrodifference equations, Allee effects, and invasions

 Models that describe the spread of invading organisms often assume no Allee effect. In contrast, abundant observational data provide evidence for Allee effects. We study an invasion model based on an integrodifference equation with an Allee effect. We derive a general result for the sign of the speed of invasion. We then examine a special, linear–constant, Allee function and introduce a numerical scheme that allows us to estimate the speed of traveling wave solutions. Received: 14 April 2000 / Revised version: 23 December 2000 / Published online: 8 February 2002     

The Introduction of Nonnative Fish into Wilderness Lakes: Good Intentions, Conflicting Mandates, and Unintended Consequences

Received 28 March 2000; accepted 12 April 2000.     

Partial directed coherence: a new concept in neural structure determination

 This paper introduces a new frequency-domain approach to describe the relationships (direction of information flow) between multivariate time series based on the decomposition of multivariate partial coherences computed from multivariate autoregressive models. We discuss its application and compare its performance to other approaches to the problem of determining neural structure relations from the simultaneous measurement of neural electrophysiological signals. The new concept is shown to reflect a frequency-domain representation of the concept of Granger causality. Received: 25 April 2000 / Accepted in revised form: 13 November 2000     

Polydactylus bifurcus, a new species of threadfin from Lombok Island, Indonesia (Perciformes: Polynemidae)

Polydactylus bifurcus sp. nov. is described on the basis of a single specimen collected from Lombok Island, Indonesia. The new species is distinguished from all other Indo-Pacific Polydactylus species by the following combination of characters: 15 pectoral fin rays, 5 pectoral filaments, 69 pored lateral line scales, 30 gill rakers, second spine of first dorsal fin very strong and lateral line bifurcated on caudal fin base, extending to posterior margins of upper and lower caudal fin lobes. Received: October 19, 2000 / Revised: April 21, 2001 / Accepted: April 25, 2001     

Immobilisation of Thiobacillus ferrooxidans cells on nickel alloy fibre for ferrous sulfate oxidation

The immobilisation of the iron-oxidising bacteria Thiobacillus ferrooxidans on nickel alloy fibre as support is described. This matrix showed promise for application in iron oxidation under strongly acidic conditions. The influence on the colonisation process of T. ferrooxidans exerted by the initial pH of the medium and by temperature has also been studied. Results showed that immobilisation of T. ferrooxidans cells was affected by changes of temperature between 30 °C and 40 °C and in pH from 1.4 to 2.0. Received: 25 January 2000 / Received version: 20 April 2000 / Accepted: 1 May 2000     

Enhanced stability of laccase in the presence of phenolic compounds

The storage stability of laccase (EC 1.10.3.2) from the white-rot basidomycete Trametes versicolor in potassium-citrate buffer was enhanced by various phenolic compounds as well as by lignin sulfonate. The highest storage stability was obtained with phenolics, e.g. phloroglucin and 3,5-dihydroxybenzoic acid; these represent substrates of laccase which are oxidized slowly because of their relatively high redox potential and which did not precipitate from the solution within the tested period of time. Sterilization enhanced the stability of laccase but additional stabilization by phenolics was observed both under sterile and non-sterile conditions. We thus concluded that stabilization occurred not only through prevention of microbial degradation. Received: 25 April 2000 / Received revision: 16 June 2000 / Accepted: 18 June 2000     

Bioinformatics 2000

A report from the Bioinformatics 2000 conference [], held in Elsinore, Denmark, 27-30 April, 2000.