Effect of Si and B on the Electrochemical Behavior of FeCoNiCr-Based High-Entropy Amorphous Alloys.

The ability to produce high-entropy alloys with an amorphous structure, so-called high-entropy metallic glasses (HEMGs), offers the possibility to produce new compositions with good mechanical properties and resistance to corrosion. In this study, corrosion behavior was studied in two HEMGs, FeCoNiCrB and FeCoNiCr(BSi). In both cases, the total amount of metalloid atoms was kept constant at 20 at.%. The electrochemical behavior of these alloys was studied by means of linear polarization resistance (LPR) measurements and electrochemical impedance spectroscopy in a 3 wt.% NaCl solution. The effect of corrosion was characterized by using X-ray photoelectron spectroscopy (XPS) and the surface morphology was checked using a scanning electron microscope (SEM). The results show that samples with B but without Si exhibit better corrosion resistance due to its chemical homogeneity and lack of structural heterogeneity.

Effect of Bauhinia holophylla treatment in Streptozotocin-induced diabetic rats.

Bauhinia holophylla, commonly known as "cow's hoof", is widely used in Brazilian folk medicine for the diabetes treatment. Therefore, the aim of this study was at evaluating the aqueous extract effect of Bauhinia holophylla leaves treatment on the streptozotocin-induced diabetic rats. Diabetes was induced by Streptozotocin (40 mg/Kg) in female Wistar rats. Oral administration of aqueous extract of Bauhinia holophylla leaves was given to non-diabetic and diabetic rats at a dose of 400 mg/kg during 21 days. On day 17 of treatment, the Oral Glucose Tolerance Test was performed to determine the area under the curve. At the end of the treatment, the animals were anesthetized and blood was collected for serum biochemical parameters analysis. After treatment with Bauhinia holophylla extract, non-diabetic and diabetic rats presented no glycemic changes. On the other hand, the plant treatment decreased body weight and increased ALT and AST activities. In conclusion, the treatment with aqueous extract of B. holophylla leaves given to diabetic rats presented no hypoglycemic effect in nondiabetic animals and no antidiabetic effect in diabetic animals with the doses studied. In addition, the diabetic animals treated with the B. holophylla extract showed inconvenient effects and its indiscriminate consumption requires particular carefulness.

A Model Mentor: Virginia Scardina, MA, MEd, OTR/L, FAOTA.

The purpose of this study was to document the influence Virginia (Ginny) Scardina, MA, MEd, OTR/L, FAOTA, occupational therapist extraordinaire, had on individuals whom she mentored. Scardina's influence was documented in a former unpublished qualitative study that conducted interviews with two of her former colleagues and six former students. This study, through the voices of five original participants and a second layer of data analysis, identified Scardina as a model mentor who was a master teacher. As a master teacher Scardina believed that, "You've got to teach to learn." Furthermore, Scardina, as a model mentor, facilitated growth in others by, "Bringing out the best," in them. Scardina's skills as a model mentor are discussed in relationship to the role of a mentor who supports, challenges others, and provides vision. Fieldwork and academic educators can learn from Scardina while reflecting upon their own influence and role in mentoring others.