Environment and shipping drive environmental DNA beta-diversity among commercial ports

The spread of nonindigenous species by shipping is a large and growing global problem that harms coastal ecosystems and economies and may blur coastal biogeographical patterns. This study coupled eukaryotic environmental DNA (eDNA) metabarcoding with dissimilarity regression to test the hypothesis that ship-borne species spread homogenizes port communities. We first collected and metabarcoded water samples from ports in Europe, Asia, Australia and the Americas. We then calculated community dissimilarities between port pairs and tested for effects of environmental dissimilarity, biogeographical region and four alternative measures of ship-borne species transport risk. We predicted that higher shipping between ports would decrease community dissimilarity, that the effect of shipping would be small compared to that of environment dissimilarity and shared biogeography, and that more complex shipping risk metrics (which account for ballast water and stepping-stone spread) would perform better. Consistent with our hypotheses, community dissimilarities increased significantly with environmental dissimilarity and, to a lesser extent, decreased with ship-borne species transport risks, particularly if the ports had similar environments and stepping-stone risks were considered. Unexpectedly, we found no clear effect of shared biogeography, and that risk metrics incorporating estimates of ballast discharge did not offer more explanatory power than simpler traffic-based risks. Overall, we found that shipping homogenizes eukaryotic communities between ports in predictable ways, which could inform improvements in invasive species policy and management. We demonstrated the usefulness of eDNA metabarcoding and dissimilarity regression for disentangling the drivers of large-scale biodiversity patterns. We conclude by outlining logistical considerations and recommendations for future studies using this approach.

Developmental changes in tibia and humerus of goose: morphometric, densitometric, and mechanical analysis

The skeletal system of young animals undergoes a series of intensive and rapid changes. In this study, we aimed to verify the hypothesis that geese exhibit a distinct pattern of bone growth compared to gallinaceous species. Specifically, we hypothesised that geese would experience an accelerated growth rate in the humerus bone, which can be attributed to the increased wing mobility facilitated by their rearing in free-range systems. This need for access to both ground and water environments contributes to the unique demands placed on their skeletal development. We focused on evaluating the mechanical properties and geometry of the humerus as the forelimb bone, and the tibia as the hindlimb bone. The 320 geese used in this study were divided into 12 groups according to sex (females and males) and age (0-,1-,3-,6-,8-,12-,14-week-old). To assess bone mechanical properties, a three-point bending test was performed, along with densitometry and morphological measurements. The tibiae of the geese showed the most intensive growth until 6 weeks of age and then stabilised. The wing bones (humerus) showed only slight changes in the first weeks after hatching, and then a rapid growth between the third and sixth week, both in terms of mechanical and morphological properties. This is most likely due to a change in the geese's living environment during this period, i.e., allowing them to leave their enclosures and enter open space, which gives them the opportunity to use their wings, resulting in the rapid growth of the wing bones to support increasing muscle mass in this area. This study increases our understanding of bone growth and development in domesticated birds, specifically waterfowl species, and highlights the importance of rearing methods on the proper bone development and functionality of the entire skeletal system, and thus, on their welfare.

Stage of goose embryo development at oviposition depending on genotype, flock age, and period of laying

Embryo development and chick quality are influenced by parental genotype, age, nutrition, environment, and flock management. The aim of study was to determine if genotype, age of goose or eggs laid near the onset of egg production vs. eggs laid near the end of reproduction influence the stage of embryo at oviposition. Three experiments were undertaken. To compare genotypes (Experiment 1) 150 eggs were collected from 3-year-old commercial line White Koluda (WK) geese and from two breeds involved in a genetic resources conservation program, Zatorska (Za) and Bilgoraj (Bi). Age comparison (Experiment 2) was conducted with 200 eggs collected from 1-, 2-, 3-, and 4-year-old WK geese. To compare laying periods (Experiment 3), 150 WK eggs were collected at the first week of March and 100 at the second half of June. Eggs were stored for 72 h at 16°C, staged using Eyal-Giladi and Kochav (EGK, Roman numerals) and Hamburger and Hamilton (HH, Arabic numerals) procedures. Experiment 1: Individual breed differences were evident with Stage X EGK embryos comprising 42.4, 33.3, and 38.7% in the eggs examined from the WK, Bi, and Za, respectively. For all breeds combined, 38.8% of the embryos were in Stage X, but in the next order in WK there was stage XI (18.2%), while in geese from the genetic reserve it was stage XIII (Bi - 33.3; Za - 29.0%). Experiment 2: In eggs of 1-, 2-, and 3-year-old WK geese, the majority of embryos (38.7, 32.4 and 42.2%, respectively) were in Stage X. In contrast, in 4-year-old geese the embryos were in Stage XI (36.1%). Experiment 3: In eggs collected in March and in June most of embryos were in Stage X (33.7% and 43.6%, respectively). In addition, more developmentally advanced stages (XI-XIII) were similar in both periods. However, embryos in Stage 2 HH were only observed in eggs collected at the end of laying season. Interestingly, earlier stages (VI-IX) were observed exclusively in the eggs collected in March.

Imiquimod 5% cream for the treatment of superficial and nodular basal cell carcinoma: randomized studies comparing low-frequency dosing with and without occlusion

BACKGROUND

Imiquimod 5% cream has been investigated for non-surgical treatment of superficial and nodular basal cell carcinoma (BCC) tumours.

OBJECTIVES

Two studies were conducted to examine the effect of occlusion at low dosing frequencies on the safety and efficacy of topical imiquimod 5% cream for the treatment of superficial and nodular BCC.

PATIENTS AND METHODS

Both open-label studies were conducted in Europe. Patients diagnosed with BCC were enrolled into either the superficial (93 patients) or nodular (90 patients) study, depending on the histological confirmation of the patient's tumour subtype. Patients were randomized to one of four groups to apply imiquimod 5% cream 2 or 3 days per week either with or without occlusion. Six weeks following a 6-week treatment period, the entire target tumour area was excised and histologically examined for evidence of residual tumour.

RESULTS

In both studies, the highest histologically complete response rate was seen in the 3 days per week with occlusion groups, with complete response rates of 87% and 65% for the superficial and nodular studies, respectively. Occlusion did not have a statistically significant effect on response rate at either dosing frequency. Response rates for superficial and nodular BCC tumours treated 3 days per week without occlusion were 76% and 50%, respectively.

CONCLUSIONS

In the superficial study, the complete response rate of 87% in the 3 days per week with occlusion group was similar to that of daily and 5 days per week dosing without occlusion in a previous 12-week study and one study of daily dosing without occlusion for 6 weeks. All treatment groups had acceptable safety profiles in both studies. Occlusion did not have a statistically significant effect on efficacy for either superficial or nodular BCC tumours.

Efficacy of topical 5% imiquimod cream for the treatment of nodular basal cell carcinoma: comparison of dosing regimens

OBJECTIVE

To establish a safe and efficacious dosing regimen for the treatment of primary nodular basal cell carcinoma (BCC) using 5% imiquimod cream.

DESIGN

Two phase 2 studies were conducted: a 6-week, randomized, open-label, dose-response study evaluating 4 dosing regimens and a 12-week, randomized, vehicle-controlled, double-blind, dose-response study evaluating 4 dosing regimens.

SETTING

Twenty-four public and private dermatology clinics in Australia and New Zealand (6-week study) and the United States (12-week study) participated.

PATIENTS

The study populations comprised 99 patients enrolled in the 6-week study and 92 patients in the 12-week study. Patients were at least 18 years old and had a biopsy-confirmed diagnosis of nodular BCC.

INTERVENTIONS

In the 6-week study, imiquimod was applied once daily for 3 or 7 days per week or twice daily for 3 or 7 days per week. In the 12-week study, imiquimod or placebo cream (vehicle) was applied once daily for 3, 5, or 7 days per week, or twice daily for 7 days per week. The entire tumor area was excised 6 weeks after treatment and examined histologically for evidence of remaining BCC.

MAIN OUTCOME MEASURE

The proportion of patients having no histologic evidence of BCC in the posttreatment excision specimen.

RESULTS

Dosing once daily for 7 days per week resulted in the highest clearance rate, with 25 (71%) of 35 and 16 (76%) of 21 patients showing clearance of their tumor in the 6- and 12-week studies, respectively.

CONCLUSIONS

Topical 5% imiquimod cream is well tolerated and most effective in treating nodular BCC when applied once daily for 7 days per week for either 12 or 6 weeks.

Imiquimod 5% cream for the treatment of superficial basal cell carcinoma: a double-blind, randomized, vehicle-controlled study

BACKGROUND

Imiquimod 5% cream may provide an effective nonsurgical treatment for superficial basal cell carcinoma (sBCC) based on results of previous studies.

OBJECTIVE

The objective of this phase II dose-response study was to explore various dosing regimens using imiquimod 5% cream for sBCC to find the most effective frequency of dosing with tolerable side effects.

METHODS

Patients (n = 128) were dosed twice daily, once daily, 5 times a week, or 3 times a week in this 12-week, randomized, double-blind, vehicle-controlled study. At 6 weeks after treatment, the entire tumor area was clinically evaluated, excised, and examined exhaustively for histologic evidence of residual sBCC.

RESULTS

Complete response rates were 100% (10/10), 87.1% (27/31), 80.8% (21/26), and 51.7% (15/29) for patients in the twice daily, once daily, 5 times a week, and 3 times a week imiquimod groups, respectively, and 18.8% (6/32) in the vehicle group.

CONCLUSION

Imiquimod 5% cream was effective in the treatment of sBCC. Daily or 5 times a week dosing for 12 weeks demonstrated high efficacy results with acceptable safety profiles.

Effects of a coping-orientated group therapy for schizophrenia and schizoaffective patients: a pilot study

OBJECTIVE

This controlled pilot study was designed, first, to examine the efficacy of two different group therapy formats for schizophrenia and schizoaffective patients: a patient-centred, psychoeducative and coping-orientated group therapy approach and a supportive therapy group. Secondly, it intended to establish preliminary hypotheses on the therapeutically relevant factors.

METHOD

In a sample of 32 patients suffering from schizophrenia or a schizoaffective disorder the effect sizes of the coping-orientated therapy approach and a supportive group therapy on several outcome variables were examined and the predictive power of different effect variables on outcome was analysed.

RESULTS

The effect sizes show improvements in the cognizance of the disorder and the related pharmacotherapy, the psychopathology and the social functioning for both therapy conditions. Moreover, outcome as measured after 1 year was best predicted by the patient's mastery of active, problem-focused coping strategies.

CONCLUSION

The results corroborate the appropriateness of focusing on aspects of coping-behaviour in psychological interventions.

[Coping-oriented group therapy for patients with schizophrenic or schizoaffective disorders. An exploratory study]

The controlled study presented here was designed to examine the influence of the degree of structure of a coping-orientated therapy, the changes between the beginning and the end of therapy concerning satisfaction with therapy, psychopathology, attitude towards medication, coping behaviour and social variables, the effects on the days of hospitalisation within one year after the end of treatment and the relevant variables to predict the outcome twelve months later. It could be shown that patients in a relatively unstructured supportive group therapy wished to discuss topics that are very similar to those of coping-orientated therapy, that coping-orientated therapy results especially in an increase in knowledge about illness and treatment and that the therapeutic outcome after a one-year period can best be predicted by the degree of active coping strategies, social adaptation, trust in medication and cognitive variables.

[Concepts of anthroposophic psychiatry and their contribution to understanding schizophrenia]

A concept of central importance in alternative forms of psychiatry, namely the concept of the etheric body, is elaborated in reference to disturbed body sensations of schizophrenic patients. In the non-orthodox approach the etheric body, i.e. a spatial organisation of forces active in the organism that is perceived only under specific circumstances, is a mediating medium between body and soul. The concept of the etheric body proves to be associated with both, the still unsolved body-mind-problem and the problem of conceptualising psychic energy. Schizophrenia is interpreted as a disorder in which the connections between body, etheric body and mind have come loose.

Magnetic Ordering in the Rare-Earth Hexaborides

Magnetic ordering in the rare-earth hexaborides has been studied by a variety of methods, and a clear correlation with the presence of conduction electrons has been found.

Superconductivity and Antiferromagnetism in Boron-Rich Lattices

Ferromagnetism, antiferromagnetism, or superconductivity has been discovered in most hexa- and dodecaborides.

Superconductivity of Alpha-Uranium and the Role of 5 f Electrons

A much sharper and lower superconducting transition has been found for alpha-uranium than any reported previously. A model that explains the unusual volume dependence of alpha-uranium below 43 degrees K and the unusual pressure dependence of its superconducting transition temperature is presented.