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One Instance (one + instance)
Selected AbstractsDifferences in egg parasitism of Chrysophtharta agricola (Chapuis) (Coleoptera: Chrysomelidae) by Enoggera nassaui Girault (Hymenoptera: Pteromalidae) in relation to host and parasitoid originAUSTRALIAN JOURNAL OF ENTOMOLOGY, Issue 3 2002Helen F Nahrung Abstract The first instances of egg parasitism of Chrysophtharta agricola, a pest of eucalypt plantations, are recorded. Enoggera nassaui was found parasitising C. agricola egg batches in Tasmania, the Australian Capital Territory (ACT), New South Wales and Victoria: this is the first record of this parasitoid species from Victoria. One instance of Neopolycystus sp. parasitising C. agricola eggs in Victoria was also recorded. Parasitism of egg batches by E. nassaui ranged from 0 to 55% between five geographical populations collected in mainland Australia (n = 45), and from 0 to 2% between two populations collected in Tasmania (n = 300). For mainland sites at which parasitism was recorded, parasitism rates within sites differed significantly from either population in Tasmania. Reciprocal exposure experiments using one Tasmanian (Florentine Valley) and one parasitised mainland (Picadilly Circus, ACT) population were conducted in the laboratory to examine whether these different parasitism rates were attributable to egg or parasitoid origin. Parasitoids from the ACT parasitised C. agricola eggs of both origins more successfully than parasitoids from Tasmania, with up to 65% wasp emergence compared with 33% from Tasmania. Parasitoid origin significantly affected the number of wasps that emerged from exposed batches, but not the total loss from parasitism. [source] Rh(I) and Pd(II) complexes of methoxy functionalized heterocyclic carbene: Synthesis and characterizationCRYSTAL RESEARCH AND TECHNOLOGY, Issue 6 2006M. E. Günay Abstract A new methoxy functionalized 2-(trichloromethyl)-1,3-diarylimidazolidin (6) was synthesized as the precursor for N-heterocyclic carbene complexes of Pd(II) and Rh(I) by the condensation of N,N'-bis(2,4-dimethoxyphenyl)-1,2-diaminoethane with chloral. The structures of all compounds have been elucidated by a combination of multinuclear NMR spectroscopy, elemental analysis and in one instance, by single crystal X-ray diffraction. Compound 8, C27H34N2O4ClRh, crystallizes in the triclinic space group P-1 with cell dimensions a = 9.7642(12)Å, b = 11.1914(11)Å, c = 13.0102(14)Å, , = 104.034(9)°, , = 106.658(9)°, , = 99.658(9)° with Z = 2. The molecular structure of 8 shows the geometry around the Rh metal to be a slightly distorted square planar. The crystal structure shows the formation of centrosymmetric dimers via intermolecular C-H...Cl hydrogen bonds. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source] T-type calcium channels: an emerging therapeutic target for the treatment of painDRUG DEVELOPMENT RESEARCH, Issue 4 2006Terrance P. Snutch Abstract It has become generally accepted that presynaptic high voltage,activated N-type calcium channels located in the spinal dorsal horn are a validated clinical target for therapeutic interventions associated with severe intractable pain. Low voltage,activated (T-type) calcium channels play a number of critical roles in nervous system function, including controlling thalamocortical bursting behaviours and the generation of spike wave discharges associated with slow wave sleep patterns. There is a growing body of evidence that T-type calcium channels also contribute in several ways to both acute and neuropathic nociceptive behaviours. In the one instance, the Cav3.1 T-type channel isoform likely contributes an anti-nociceptive function in thalamocortical central signalling, possibly through the activation of inhibitory nRT neurons. In another instance, the Cav3.2 T-type calcium channel subtype acts at the level of primary afferents in a strongly pro-nociceptive manner in both acute and neuropathic models. While a number of classes of existing clinical agents non-selectively block T-type calcium channels, there are no subtype-specific drugs yet available. The development of agents selectively targeting peripheral Cav3.2 T-type calcium channels may represent an attractive new avenue for therapeutic intervention. Drug Dev. Res. 67:404,415, 2006. © 2006 Wiley-Liss, Inc. [source] Salinophagia in anorexia nervosa: Case reportsINTERNATIONAL JOURNAL OF EATING DISORDERS, Issue 2 2010John F. Morgan MA, MRCPsych Abstract We report two cases of pathological ingestion of salt as a feature of anorexia nervosa, which we have previously termed "salinophagia." Both cases were young women with anorexia nervosa of the purging subtype and of sufficient severity to necessitate inpatient treatment. In both instances, excessive quantities of salt were ingested in the context of treatment programs requiring nutritional rehabilitation, and motivated by a wish to despoil the food and render it distasteful, to rob its ingestion of any hedonic qualities. In one instance, this behavior pattern was imitated by other patients on the unit. Having first briefly described salinophagia in 1999, the first author has received considerable correspondence from other specialists suggesting that this is not an isolated phenomenon. The issues of phenomenology and treatment are further discussed. © 2009 by Wiley Periodicals, Inc. Int J Eat Disord, 2010 [source] University of San Diego palynological investigation of the Dos Cabezas giantsINTERNATIONAL JOURNAL OF OSTEOARCHAEOLOGY, Issue 5 2003P. S. Geyer Abstract Beginning in 1999, coprolite soil samples were collected from the skeletal remains of Moche giants excavated at the archaeological site of Dos Cabezas, northern Peru. In 2000, a pilot palynological study was undertaken to ascertain if pollen was recoverable from them. The results of this study encouraged us to form a student team to continue the laboratory research. It was also decided to sample as many of the excavated skeletal remains from the giants' tombs as possible. Following the 2001 field season a palynological study was performed on the three individuals (one adult giant and two children) recovered from Tomb 3 in 1999. Pollen was extracted and analysed. The combined results of this archaeobotanical study are significant and in one instance have led us into insights into the possible causes of death of these three contemporaneous internments. This report represents only the preliminary results of this ongoing research. Copyright © 2003 John Wiley & Sons, Ltd. [source] Laparoscopic pyeloplasty for ureteropelvic junction obstruction: Outcome of initial 12 proceduresINTERNATIONAL JOURNAL OF UROLOGY, Issue 7 2004MASATSUGU IWAMURA Abstract Background:, Open pyeloplasty has been the gold standard for surgical treatment of ureteropelvic junction (UPJ) obstruction, enjoying a long-term success rate exceeding 90%. Unfortunately, this procedure requires a muscle incision that entails some degree of morbidity. We have, therefore, investigated the feasibility of laparoscopic pyeloplasty for UPJ obstruction and report here the outcomes of our early cases. The median follow up is 25 months (range, 12,42 months). Methods:, Between March 1999 and September 2001 we performed laparoscopic pyeloplasty on 12 ureters in 11 patients presenting with symptomatic hydronephrosis, secondary to a short stenosis of the UPJ or to ventrally crossing vessels; bilateral pyeloplasty was performed as a single procedure in one patient. We performed dismembered Anderson,Hynes pyeloplasty, Fenger plasty and Y-V plasty in eight, two and two ureters, respectively. All procedures were carried out transperitoneally. Results:, The procedure was completed successfully in all cases. Crossing vessels were noted in six of 12 ureters (50.0%). Mean operative time and blood loss in 11 patients (including one bilateral case) were 272.8 min (range, 175,480 min) and 96.4 mL (range, 20,340 mL), respectively. Postoperative complications were noted in two patients (18.2%): one instance of prolonged urine leakage and one anastomotic re-stricture. Eleven of 12 ureters (91.6%) demonstrated a patent UPJ on excretory urography and/or improvement of renal function on diuretic renography at a minimum follow up of 12 months. Conclusion:, Although the procedure requires advanced laparoscopic skills, it can be safely and successfully completed as frequently as the conventional open procedure. Laparoscopic pyeloplasty seems to be a valuable alternative to open pyeloplasty for UPJ obstruction. [source] Shiny spheres of placozoans (Trichoplax) function in anti-predator defenseINVERTEBRATE BIOLOGY, Issue 3 2009Alexis M. Jackson Abstract. When individual placozoans, Trichoplax adhaerens, were fed to polyps of the hydroid Podocoryna carnea, the polyps became paralyzed in all 27 trials. In one instance the hydroid polyp died and in five instances a fragment of the placozoan survived. The time to recovery from paralysis varied with the relative size of the polyp and the placozoan. Placozoans were disassociated into separate cells and then reaggregated by centrifugation to produce pellets of tissue lacking the vesicles called shiny spheres, normally abundant in the upper epithelium. We fed pellets of two size classes to the hydroid polyps. When the placozoan pellet was smaller than the hydroid, paralysis was eliminated in nine of ten trials. When the placozoan pellet was comparable in size to the polyp, paralysis occurred but the recovery time was substantially reduced, compared with trials in which polyps were fed intact placozoans possessing shiny spheres. These results support a function of shiny spheres in anti-predator defense. [source] A fractal forecasting model for financial time seriesJOURNAL OF FORECASTING, Issue 8 2004Gordon R. Richards Abstract Financial market time series exhibit high degrees of non-linear variability, and frequently have fractal properties. When the fractal dimension of a time series is non-integer, this is associated with two features: (1) inhomogeneity,extreme fluctuations at irregular intervals, and (2) scaling symmetries,proportionality relationships between fluctuations over different separation distances. In multivariate systems such as financial markets, fractality is stochastic rather than deterministic, and generally originates as a result of multiplicative interactions. Volatility diffusion models with multiple stochastic factors can generate fractal structures. In some cases, such as exchange rates, the underlying structural equation also gives rise to fractality. Fractal principles can be used to develop forecasting algorithms. The forecasting method that yields the best results here is the state transition-fitted residual scale ratio (ST-FRSR) model. A state transition model is used to predict the conditional probability of extreme events. Ratios of rates of change at proximate separation distances are used to parameterize the scaling symmetries. Forecasting experiments are run using intraday exchange rate futures contracts measured at 15-minute intervals. The overall forecast error is reduced on average by up to 7% and in one instance by nearly a quarter. However, the forecast error during the outlying events is reduced by 39% to 57%. The ST-FRSR reduces the predictive error primarily by capturing extreme fluctuations more accurately. Copyright © 2004 John Wiley & Sons, Ltd. [source] Sexual abuse in children and adolescents with intellectual disabilityJOURNAL OF INTELLECTUAL DISABILITY RESEARCH, Issue 3 2001R. Balogh Abstract The present authors conducted a study of the occurrence of victimization and the perpetration of sexual abuse among 43 in-patients with intellectual disability aged between 9 and 21 years who were admitted to a child and adolescent psychiatric in-patient department over a period of 5 years. A retrospective case-note review was employed that explored the nature and severity of abuse in relation to the age, gender and level of disability. The prevalence of abuse or abusive behaviour, i.e. 14% of 300 admissions, did not change over time. In 13 out of the 43 cases, the issue of sexual abuse was identified after admission. Victimization alone occurred in 21 cases, perpetration alone in six cases, and both victimization and perpetration in 16 cases. Fifty per cent of the victims had been abused by a member of their close or extended family. Most cases (62%) were adolescents. There was only one instance of a victim being abused by a female. However, there were five girls who were perpetrators, all of whom had previously been victims. By contrast, 11 out of the 17 male perpetrators had been victims. Despite difficulties of disclosure, it was possible to establish that severely disabled patients had suffered sexual abuse. The present data support theories which (1) recognize gender differences in sexual abuse patterns and (2) have a developmental perspective, incorporating the influence of adolescence. [source] The Relation of Patterns of Coping of Inner,City Youth to Psychopathology SymptomsJOURNAL OF RESEARCH ON ADOLESCENCE, Issue 4 2002Patrick H. Tolan This study provides empirical verification that variations in patterns of coping can explain current and future functioning of youth. The study evaluated the methods and styles of coping of inner,city youth and their relation to age, gender, ethnicity, stress levels, and internalizing and externalizing symptom levels. Three hundred seventy,two 12, to 16,year,old adolescents from inner,city schools (67.0% African American, 24.4% Hispanic; 53.41% males) participated. One hundred forty,nine were also included in a follow,up evaluation of the prospective relation of coping to functioning. A seven,factor model of coping methods was identified and found to be applicable across age groups, genders, and ethnic groups. The model was robust over time. Coping methods were categorized through cluster analysis into five styles. Styles were found to relate somewhat to demographic characteristics and stress levels. Controlling for demographic characteristics and stress levels, coping style related concurrently and prospectively to internalizing and externalizing symptom levels. Except in one instance, age, ethnicity, and gender did not interact with coping in predicting symptoms. Implications for further coping research and risk and intervention design are discussed. [source] Eviction and dispersal in co-operatively breeding banded mongooses (Mungos mungo)JOURNAL OF ZOOLOGY, Issue 2 2001Michael A. Cant Abstract The mode by which individuals disperse, and the cost of dispersal, are of great importance in attempts to understand variation in reproductive skew in animal societies. In this paper we report detailed information on dispersal and pack formation in banded mongooses Mungos mungo. Six pack fission events were recorded among 11 packs over 22 months. Pack fission occurred under two distinct circumstances. First, groups of individuals were evicted from their natal group as a result of intense aggression from other group members. A small fraction of group members was responsible for most of the aggression. Both sexes helped to attack and evict individuals from the group, and both males and females were driven out of their natal groups en masse. The second mode of pack fission occurred when groups of same-sex individuals left their natal group voluntarily to join dispersing individuals of the opposite sex, thereby forming new packs. Dispersing groups were more frequently involved in fights with rival packs of mongooses compared to established groups, and in one instance these fights seemed to be responsible for severe injury and increased mortality among members of a dispersing group. The observations of eviction provide one line of evidence that the presence of subordinates is sometimes detrimental to dominants, contrary to the assumptions of concession models of reproductive skew. [source] Do "Off-Site" Adult Businesses Have Secondary Effects?LAW & POLICY, Issue 2 2009Empirical Evidence, Legal Doctrine, Social Theory Recent federal court decisions appear to limit the ability of cities to mitigate the ambient crime risks associated with adult entertainment businesses. In one instance, a court has assumed that criminological theories do not apply to "off-site" adult businesses. After developing the legal doctrine of secondary effects, we demonstrate that the prevailing criminological theory applies to all adult business models. To corroborate the theory, we report the results of a before/after quasi-experiment for an off-site adult business. When an off-site adult business opens, ambient crime risk doubles compared to a control area. As theory predicts, moreover, ambient victimization risk is most acute in night-time hours. The theoretical development and empirical results have obvious implications for the evolving legal doctrine of secondary effects. [source] Shared thinking: metacognitive modelling in the literacy hourLITERACY, Issue 2 2002Ros Fisher This paper considers evidence from an ESRC funded study of twenty teachers, teaching the literacy hour. In 170 hours of observation only one instance of a teacher modelling her thinking about reading or writing was recorded: and this was unplanned. It is suggested here that, although there should be opportunities for metacognitive modelling within the literacy hour, teachers find it difficult to use these opportunities. Some ideas about the importance of metacognition are reviewed and an example of metacognitive modelling in shared writing is analysed. It is argued that concern for improved performance may cause more attention to be focused on what is to be achieved rather than how. [source] KILLER WHALE ATTACKS ON MINKE WHALES: PREY CAPTURE AND ANTIPREDATOR TACTICSMARINE MAMMAL SCIENCE, Issue 4 2005John K. B. Ford Abstract We describe nine incidents of predation or attempted predation of minke whales (Balaenoptera acutorostrata) by mammal-hunting "transient" killer whales (Orcinus orca) in coastal waters of British Columbia, Washington, and southeastern Alaska. Pursuits of minke whales were characterized by prolonged chases on a straight heading at velocities of 15,30 km/h. In four of the nine cases the adultsized minke whale gradually outdistanced the killer whales, which abandoned the high-speed pursuit after 0.5,1 h. In one case the minke beached itself and died. Four attacks were successful. In one instance a subadult minke was killed in open water following a chase. In two cases the fleeing minke entered a confined bay and was killed by the killer whales. One adult minke was taken after apparently attempting to seek cover beside a large sailboat. Minke whales made no attempt to physically defend themselves and were killed by repeated ramming or by asphyxiation. Although killer whales are capable of sprinting speeds greater than those of minke whales, it appears that adult minkes can maintain higher sustained speeds and evade capture if sufficient space for an extended escape trajectory is available. Successful predation of minke whales in coastal waters is rare compared to pinnipeds and small cetaceans, the main prey of transient killer whales. 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