Evidence of decoupling of surface and bulk states in Dirac semimetal Cd3As2.

Dirac semimetals have attracted a great deal of current interests due to their potential applications in topological quantum computing, low-energy electronic devices, and single photon detection in the microwave frequency range. Herein are results from analyzing the low magnetic (B) field weak-antilocalization behaviors in a Dirac semimetal Cd3As2thin flake device. At high temperatures, the phase coherence lengthlϕfirst increases with decreasing temperature (T) and follows a power law dependence oflϕ∝T-0.4. Below âˆ¼3 K,lϕtends to saturate to a value of âˆ¼180 nm. Another fitting parameterα, which is associated with independent transport channels, displays a logarithmic temperature dependence forT > 3 K, but also tends to saturate below âˆ¼3 K. The saturation value, âˆ¼1.45, is very close to 1.5, indicating three independent electron transport channels, which we interpret as due to decoupling of both the top and bottom surfaces as well as the bulk. This result, to our knowledge, provides first evidence that the surfaces and bulk states can become decoupled in electronic transport in Dirac semimetal Cd3As2.

Vanadium inhalation in a mouse model for the understanding of air-suspended particle systemic repercussion.

There is an increased concern about the health effects that air-suspended particles have on human health which have been dissected in animal models. Using CD-1 mouse, we explore the effects that vanadium inhalation produce in different tissues and organs. Our findings support the systemic effects of air pollution. In this paper, we describe our findings in different organs in our conditions and contrast our results with the literature.

Insecticide residues in stored grains in Sonora, Mexico: quantification and toxicity testing.

Food safety has acquired great attention by food importer and exporters. Food rejection or acceptance across international borders is based on the compliance with international food regulations. Due to the lack of recent data on pesticide residues in Mexican grains, this study focused on detecting and quantifying insecticide residues in stored wheat, corn, chickpeas, and beans, as well as to determine their mutagenic potential. Grains were sampled from primary storage sites in Sonora, Mexico. Malathion, chlorpyrifos, deltamethrin, cypermethrin, 4,4-DDE, 4,4-DDD and 4,4-DDT were analyzed in 135 samples. Grain samples were not mutagenic and most pesticide levels were within regulation limits.

Risk factors for maladaptive eating patterns in college women.

As the empirical literature on maladaptive eating patterns has grown, the importance of longitudinal studies in establishing causal risk factors has become apparent. The current study reports longitudinal data gathered from the first 20 months of college for female students (n=117). Eating pathology was assessed using a composite measure from the Eating Disorders Inventory. Variables examined as potential risk factors included depression, reassurance seeking, perfectionism, impulsiveness, body dissatisfaction, and stressful events. Eating symptoms were quite stable across the 20-month interval (r=0.68). Although all of the potential risk variables showed significant correlations with eating symptoms, hierarchical regressions controlling for eating symptoms at Time 1 indicated that perfectionism, impulsiveness, and body dissatisfaction failed to uniquely add to the prediction of eating symptoms at Time 2. Depression, reassurance seeking and stressful events did add to this prediction. Failure to find support for variables in a longitudinal design may be due to the age of participants and relative stability of eating symptoms. Perfectionism, and body dissatisfaction may play a causal role in developing eating symptoms at earlier ages, but do not continue to influence the course of these symptoms in late adolescence. Negative affect (depression), needing reassurance in social relationships, and having to deal with stressful events seem to be risk factors for increased eating symptoms in late adolescence.

Pediatric update # 13. Injuries to the inferior pole of the patella in children.

Sinding-Larsen-Johansson disease and sleeve fractures are two injuries that occur at the inferior pole of the patella in children. The first is a chronic tendinitis accompanied by calcification of the avulsed patellar tendon. The latter are acute injuries that involve a complete avulsion of the proximal insertion of the patellar tendon with a small fleck of bone and portion of patellar articular cartilage. Illustrative case histories and a literature review are presented.

Training child welfare workers for cultural awareness: the culture simulator technique.

The Mexican-American Culture Simulator introduces a new, cost-effective method of training child welfare workers for cultural awareness. It was published in 1981 by the Worden School as a two-volume module containing 20 vignettes each [7]. The accompanying trainer's manual provides instruction for conducting modular training and a discussion guide that analyzes the values and practice implications in each vignette [8]. The simulator has a number of key advantages over some of the more traditional seminar approaches to this type of training. 1. It is directly related to child welfare practice, providing information in a familiar problem-oriented casework format that facilitates the transfer of knowledge to job-related activities. 2. It enables the trainees to learn at the their own pace, in private, and at a location of their own choice. 3. It exposes the trainees to standardized material that enables them to assess their progress, and controls for variations in the trainer's expertise. 4. It is brief and easily administered, thus allowing for its efficient distribution and use in training large numbers of workers. 5. It provides a baseline level of knowledge that can be supplemented with more extensive and specific training to meet differing staff needs. Its principal disadvantage results from its apparent effectiveness and utility: there is the possibility that it might be used as the sole source of training for child welfare workers about the Mexican-American community whose cultural pattern is too rich, varied, and a complex to be captured by a single instrument that focuses on cognitive awareness of selected traditional values. Within its limitations, however, cultural simulator training introduces an interim method of improving services to the Hispanic community.

Estudio preliminar del recuerdo mediato

Se hace un estudio de la memoria mediata en pacientes esquizofrénicos y sujetos supuestamente normales utilizando la técnica del pictograma del profesor A RLuria, basada en el método de doble estimulación. Seanalizan los resultados obtenidos sobre la base de la función simbólica o generalizadora de la palabra, el cotenido de las asociaciones y la capacidad de evocación, que son los objetivos que se plantea analizar la técnica (AU)

An evaluation of the A4 folder system in general practice.

All 63 general practices known to have introduced the A4 folder system were asked to complete questionnaires comparing A4 records with the traditional medical records envelope system. Of the 77 per cent who replied, an overwhelming majority favoured the A4 system and felt that it helped them to obtain higher standards of care for patients.