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Retention of basic components of a crude oil by clay-containing reservoir sandstone was studied by flowing crude oil through cores and monitoring the concentration of bases in the effluent. Cores that were H-saturated, H-saturated then aged, and Na-saturated retained 0·82, 0·82, 0·70, and 0·20 meq base/100 g, respectively. Barium exchange capacity values were 0·86, 0·71, and 0·83 meq/100 g. Subsequent floods with water, toluene, and chloroform-acetone removed oil that had increasing concentrations of base and N, indicating that the basic fraction of crude oil was the most difficult fraction to extract from clay mineral surfaces. Retained bases were nitrogenous and the most tenaciously held bases had base/N ratios approaching unity.
One of the WHO's innovations for improving the ICD-11 chapter Mental and Behavioral Disorders was the creation of the Global Clinical Practice Network (GCPN), an international network of more than 12,000 mental health and primary care professionals from 144 countries.
Aims and objectives
In order to evaluate perceived clinical utility of the ICD-11 guidelines, the case-controlled field studies that involved the application of the proposed diagnostic guidelines to standardized case material were implemented via the Internet in different languages.
Method
Two hundred and seventy-eight Russian mental health care professionals, the GCPN members, have participated in case controlled Internet study for the chapter “Schizophrenia and Other Primary Psychotic Disorders”. Russian participants were represented by psychiatrists mostly (89%) and much less by psychologists (8%) which corresponds with the general situation in the Russian mental health care system.
Results
Russian clinicians have used the proposed ICD-11 diagnostic guidelines successfully to assess delusional disorder as well as schizophrenia. But there were certain categories (schizoaffective disorder, subthreshold delusions) with which the participants seemed to struggle. The critical comments were focused on opposing so called syndrome-based assessment and nosological diagnostics. Most concerns were about elimination of Schizophrenia subtypes.
Conclusion
Russian mental health care professionals proved to be interested in ICD revision process and demonstrated their special diagnostics opinion based on rich clinical traditions and psychopathological approach. In order to use ICD-11 guidelines in clinical practice more efficiently supplementary appropriate training would be needed.
Disclosure of interest
The authors have not supplied their declaration of competing interest.
Secondary plant compounds have shown bioactivity against multi-drug resistant Haemonchus contortus in small ruminants. This study screened 51 strains of birdsfoot trefoil (BFT, Lotus corniculatus) crude aqueous extracts (BFT-AqE) for anti-parasitic activity in vitro against egg hatching, and of those 51 strains, 13 were selected for further testing of motility of first (L1) and third stage (L3) larvae, and exsheathment of L3. Proanthocyanidin content ranged between 1.4 and 63.8 mg PAC g−1 powder across the 51 BFT strains. When tested against egg hatching, 21 of the 51 aqueous extracts had an EC50 of 1–2 mg powder mL−1, 70% of the strains were >90% efficacious at 6 mg powder mL−1 and 11 of the strains were 100% efficacious at 3 mg powder mL−1 BFT-AqE. Across the 13 strains tested against L3, efficacy ranged from 0 to 75% exsheathment inhibition, and 17 to 92% L3 motility inhibition at a concentration of 25 mg powder mL−1 BFT-AqE. There was no correlation between the PAC content of BFT powders and the anti-parasitic activity of aqueous extracts, therefore other secondary compounds may have contributed to the observed anti-parasitic effects. Further testing of BFT using bioactivity-driven fractionation and screening of BFT populations for the identified anti-parasitic compounds is needed.
The use of psychoactive, potentially dependence-producing substances is highly prevalent around the world, and contributes substantially to global disease burden. There is a major gap between the need for treatment for substance use disorders. Changes proposed for the classification of substance use disorders in the Eleventh Revision of the International Classification of Diseases and Related Health Problems, based on a public health approach, have important implications for the conceptualisation, structure and availability of services. These include: (1) an updated and expanded range of substance classes; (2) greater specification of different harmful patterns of substance use, which may be continuous or episodic and recurrent; (3) a new category to denote single episodes of harmful use; (4) a category describing hazardous use of substances; and (5) simplification of diagnostic guidelines for substance dependence. This paper describes these changes and the opportunities they present for improved prevention, treatment, monitoring and health policy.
The study aimed to examine variations in the use of International Classification of Diseases, Tenth Edition (ICD-10) diagnostic categories for mental and behavioural disorders across countries, regions and income levels using data from the online World Psychiatric Association (WPA)-World Health Organization (WHO) Global Survey that examined the attitudes of psychiatrists towards the classification of mental disorders.
Methods.
A survey was sent to 46 psychiatric societies which are members of WPA. A total of 4887 psychiatrists participated in the survey, which asked about their use of classification, their preferred system and the categories that were used most frequently.
Results.
The majority (70.1%) of participating psychiatrists (out of 4887 psychiatrists) reported using the ICD-10 the most and using at least one diagnostic category once a week. Nine out of 44 diagnostic categories were considerably variable in terms of frequency of use across countries. These were: emotionally unstable personality disorder, borderline type; dissociative (conversion) disorder; somatoform disorders; obsessive–compulsive disorder (OCD); mental and behavioural disorders due to the use of alcohol; adjustment disorder; mental and behavioural disorders due to the use of cannabinoids; dementia in Alzheimer's disease; and acute and transient psychotic disorder. The frequency of use for these nine categories was examined across WHO regions and income levels. The most striking differences across WHO regions were found for five out of these nine categories. For dissociative (conversion) disorder, use was highest for the WHO Eastern Mediterranean Region (EMRO) and non-existent for the WHO African Region. For mental and behavioural disorders due to the use of alcohol, use was lowest for EMRO. For mental and behavioural disorders due to the use of cannabinoids, use was lowest for the WHO European Region and the WHO Western Pacific Region. For OCD and somatoform disorders, use was lowest for EMRO and the WHO Southeast Asian Region. Differences in the frequency of use across income levels were statistically significant for all categories except for mental and behavioural disorders due to the use of alcohol. The most striking variations were found for acute and transient psychotic disorder, which was reported to be more commonly used among psychiatrists from countries with lower income levels.
Conclusions.
The differences in frequency of use reported in the current study show that cross-cultural variations in psychiatric practice exist. However, whether these differences are due to the variations in prevalence, treatment-seeking behaviour and other factors, such as psychiatrist and patient characteristics as a result of culture, cannot be determined based on the findings of the study. Further research is needed to examine whether these variations are culturally determined and how that would affect the cross-cultural applicability of ICD-10 diagnostic categories.
Aberrant emotional biases have been reported in bipolar disorder (BD), but results are inconsistent. Despite the clinical relevance of chronic mood variability in BD, there is no previous research investigating how the extent of symptom fluctuations in bipolar disorder might relate to emotional biases. This exploratory study investigated, in a large cohort of bipolar patients, whether instability in weekly mood episode symptoms and other clinical and demographic factors were related to emotional bias as measured in a simple laboratory task.
Method
Participants (N = 271, BDI = 206, BDII = 121) completed an ‘emotional categorization and memory’ task. Weekly self-reported symptoms of depression and mania were collected prospectively. In linear regression analyses, associations between cognitive bias and mood variability were explored together with the influence of demographic and clinical factors, including current medication.
Results
Greater accuracy in the classification of negative words relative to positive words was associated with greater instability in depressive symptoms. Furthermore, greater negative bias in free recall was associated with higher instability in manic symptoms. Participants diagnosed with BDII, compared with BDI, showed overall better word recognition and recall. Current antipsychotic use was associated with reduced instability in manic symptoms but this did not impact on emotional processing performance.
Conclusions
Emotional processing biases in bipolar disorder are related to instability in mood. These findings prompt further investigation into the underpinnings as well as clinical significance of mood instability.
Systemic vascular malformations are a rare cause of congestive heart failure in the infant and newborn infant. Clinical diagnosis is often problematic. Accordingly, this study presents the clinical, radiographic, ultrasound imaging, pulsed and color Doppler features of systemic vascular malformations in six infants. In all cases, color Doppler provided vital information regarding size, location, source of feeding arteries and venous drainage essential for appropriate management of these patients. Color flow Doppler ultrasonography is an accurate and sensitive modality for detecting and evaluating vascular malformations.
Our understanding of anatomical differences in people with autistic-spectrum disorder, is based on mixed-gender or male samples.
Aims
To study regional grey-matter and white-matter differences in the brains of women with autistic-spectrum disorder.
Method
We compared the brain anatomy of 14 adult women with autistic-spectrum disorder with 19 controls using volumetric magnetic resonance imaging and voxel-based morphometry Results Women with autistic-spectrum disorder had a smaller density bilaterally of grey matter in the frontotemporal cortices and limbic system, and of white matter in the temporal lobes (anterior) and pons. In contrast, they had a larger white-matter density bilaterally in regions of the association and projection fibres of the frontal, parietal, posterior temporal and occipital lobes, in the commissural fibres of the corpus callosum (splenium) and cerebellum (anterior lobe). Further, we found a negative relationship between reduced grey-matter density in right limbic regions and social communication ability.
Conclusions
Women with autistic-spectrum disorder have significant differences in brain anatomy from controls, in brain regions previously reported as abnormal in adult men with the disorder. Some anatomical differences may be related to clinical symptoms.
Because PG 2303+243 had not been observed since 1992, we have arranged the mini-campaign of six observatories on PG 2303+243 in 2004 Sep. 5-21 for the more detailed frequency analysis of variations. The amplitudes of the most frequencies change even during the one night and some frequencies can disappear or appear in one year. Probably it is resonance effect. We have estimated 69 frequencies of pulsations and their amplitudes according the observations from 2004 and 36 frequencies and its amplitudes from 2005.
People with learning disability who exhibit challenging behaviour are frequently segregated from services and local teams are often reluctant to receive them back into their care. This situation is worse in those whose challenging behaviour includes a forensic history, but the difference between those labelled as challenging and those treated as offenders is not clear, and there is a lack of evidence about treatment effectiveness.
Aims
To test between-group differences in aggression and treatment outcome in people with learning disability and challenging behaviour, with and without a forensic history.
Method
Clinical records of 86 former in-patients (45 offenders and 41 non-offenders) of a specialist unit were compared on measures of behavioural disturbance and placement outcome.
Results
People in the offenders group were significantly less likely to be aggressive to others and to use weapons, but significantly more likely to harm themselves compared with the non-offenders group. Both groups had a significant reduction in their challenging behaviour during admission, and there was no significant difference in treatment outcome.
Conclusions
The negative reputation of people with learning disabilities who offend needs to be reconsidered.
Microstructures of well-aligned multiwall carbon nanotubes grown on patterned nickel nanodots and uniform thin films by plasma-enhanced chemical vapor deposition have been studied by electron microscopy. It was found that growth of carbon nanotubes on patterned nickel nanodots and uniform thin films is different. During growth of carbon nanotubes, a nickel particle sits at the tip of each nanotube, and its [220] is preferentially oriented along the plasma direction, which can be explained by a channeling effect of ions coming into nickel particles in plasma. The alignment of nanotubes is induced by the electrical field direction relative to substrate surface.
Cyclic voltammetry (CV) was used to study the reduction potentials of 2,5-di(ethynylphenyl)-4-nitroaniline and 2,5-di(ethynylphenyl)nitrobenzene. Although no absolute reduction potentials can be used in the correlation between solution (CV) and solid state (nanopore) embodiments, each CV plot showed two reductions. The first and second reduction might correspond to switching events of recently reported molecular electronic devices in a nanopore. Cyclic voltammetry results are also reported for other potential molecular scale electronic devices.