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- Author or Editor: C. Lu x
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The aphid Sitobion avenae F. is one of the most harmful pests of wheat growth in the world. A primary field screening test was carried out to evaluate the S. avenae resistance of 527 wheat landraces from Shaanxi. The results indicated that 25 accessions (4.74%) were resistant to S. avenae in the three consecutive seasons, of which accession S849 was highly resistant, and seven accessions were moderately resistant. The majority of S. avenae resistant accessions come from Qinling Mountains. Then, the genetic variability of a set of 33 accessions (25 S. avenae resistant and 8 S. avenae susceptible) originating from Qinling Mountains have been assessed by 20 morphological traits and 99 simple sequence repeat markers (SSRs). Morphological traits and SSRs displayed a high level of genetic diversity within 33 accessions. The clustering of the accessions based on morphological traits and SSR markers showed significant discrepancy according to the geographical distribution, resistance to S. avenae and species of accessions. The highly and moderately resistant landrace accessions were collected from the middle and the east part of Qinling Mountains with similar morphology characters, for example slender leaves with wax, lower leaf area, and high ear density. These S. avenae resistant landraces can be used in wheat aphid resistance breeding as valuable resources.
Abstract
The heat capacities of fenpropathrin in the temperature range from 80 to 400 K were measured with a precise automatic adiabatic calorimeter. The fenpropathrin sample was prepared with the purity of 0.9916 mole fraction. A solid—liquid fusion phase transition was observed in the experimental temperature range. The melting point, T
m, enthalpy and entropy of fusion, 
fus
H
m,
fus
S
m, were determined to be 322.48±0.01 K, 18.57±0.29 kJ mol–1 and 57.59±1.01 J mol–1 K–1, respectively. The thermodynamic functions of fenpropathrin, H
(T)—H
(298.15), S
(T)—S
(298.15) and G
(T)—G
(298.15), were reported with a temperature interval of 5 K. The TG analysis under the heating rate of 10 K min–1 confirmed that the thermal decomposition of the sample starts at ca. 450 K and terminates at ca. 575 K. The maximum decomposition rate was obtained at 558 K. The purity of the sample was determined by a fractional melting method.
Abstract
The power vs. time curves of the promoter bacteria of a nutrient drug were determined by using a 2277 Thermal Activity Monitor (Sweden). A new experimental model of bacterial growth were established. The growth rate constant, heat output and optimum concentration of specific promoter bacterial of nutrient drug were calculated.
Aim
To examine the relationship between borderline personality symptoms and Internet addiction as well as the mediating role of mental health problems between them.
Methods
A total of 500 college students from Taiwan were recruited and assessed for symptoms of Internet addiction using the Chen Internet Addiction Scale, borderline personality symptoms using the Taiwanese version of the Borderline Symptom List and mental health problems using four subscales from the Symptom Checklist-90-Revised Scale (interpersonal sensitivity, depression, anxiety, and hostility). Structural equation modeling (SEM) was used to test our hypothesis that borderline personality symptoms are associated with the severity of Internet addiction directly and also through the mediation of mental health problems.
Results
SEM analysis revealed that all paths in the hypothesized model were significant, indicating that borderline personality symptoms were directly related to the severity of Internet addiction as well as indirectly related to the severity of Internet addiction by increasing the severity of mental health problems.
Conclusion
Borderline personality symptoms and mental health problems should be taken into consideration when designing intervention programs for Internet addiction.
Abstract
Background and aims
The lockdown of sports and gambling venues during the coronavirus disease 2019 (COVID-19) pandemic caused a fear of increased gambling on other online gambling types, with a risk for transfer to more addictive gambling than otherwise. This study aimed to estimate changes in gambling activity during COVID-19-affected periods among all gamblers at a Swedish state-owned gambling operator and to analyse observable sex differences.
Methods
This study included gambling tracking data from the Swedish state-owned gambling operator Svenska Spel Sports & Casino (sports betting, online bingo, casino and poker). All individuals (n = 616,245) who gambled at least once from February 10 to July 19, 2020, were included. The study period was divided into four periods according to their expected level of COVID-19 impact on gambling opportunities: one pre-COVID period and three COVID-affected periods (sports cancellation, emerging return of sports, substantial return of sports).
Results
Sports betting experienced an apparent decrease, followed by a gradual normalization and an end level substantially below prepandemic levels. For online bingo, gambling levels increased upon sports interruption and then decreased with the return to normality in sports events but remained higher than baseline levels. We observed a similar trend for online poker during the interruption of sports, but with a lower level than baseline levels when sports events normalized. We noticed a trend favouring online casinos during the sports interruption period regarding gambling intensity but not wagering levels.
Discussion and conclusions
Dramatic changes in the content of the gambling market may divert some gamblers to other gambling types, but maintained effects could not be demonstrated.
Abstract
Background and aims
Theoretical background and previous data provide some similarities between problematic gambling and eating behaviors, and a theoretically increased clinical severity in individuals suffering from both conditions. However, large datasets are lacking, and therefore, the present study aimed to study, in a nationwide register material, psychiatric comorbidity, age and gender in gambling disorder (GD) patients with or without eating disorder (ED).
Methods
Diagnostic data from a nationwide register were used, including all individuals with a GD diagnosis in specialized health care in Sweden, in the years 2005–2016 (N = 2,099). Patients with GD and an ED diagnosis (n = 57) were compared to GD patients without ED.
Results
Patients with GD+ED were significantly more likely than other GD patients to also have a diagnosis of drug use disorder, depressive disorders, bipolar disorders, other mood disorder, anxiety disorders, personality disorders, and neuropsychiatric disorders, when controlling for gender. In logistic regression, a comorbid ED in GD was associated with female gender, younger age, depressive disorder and personality disorders.
Discussion and conclusion
In nationwide register data, despite the low number of GD+ED patients, GD patients with ED appear to have a more severe psychiatric comorbidity than GD patients without ED. The combined GD+ED conditions may require particular screening and clinical attention, as well as further research in larger and longitudinal studies.
