Mexican-American women in professional careers: The price of success
This study explored the most critical problems encountered by Mexican-American women in professional careers. These women were employed in art, science, engineering, education, medicine, law, writing, and administrative and managerial specialties. Both single (N 38) and married (N = 33) women participated in this study. There were no restrictions on age, number of years on the job, or educational level. A questionnaire designed by the researcher was used to gather information on the subjects. The questionnaire was divided into three parts: Part 1 solicited demographic information, Part 2 addressed issues encountered in the workplace, and Part 3 examined issues encountered at home. Findings from the study indicated that the most critical problems encountered by Mexican-American women in the workplace included the "Superwoman complex, 11 being the "only, 11 and establishing legitimacy. At home, crucial issues consisted of the Superwoman complex, self-imposed guilt/torment, and family pressure. Additional questions revealed critical problems encountered by these women.
Women and the labor market: the link grows stronger.
The labor force participation of U.S. women aged 25-54 is examined using official data. Trends in female employment during the period 1946-1987 by sex age ethnic group and marital status are outlined. Changes in the nature and extent of paid employment among women of all age race and marital status groups are highlighted. The author projects a slower rate of increase in female labor force participation rates between 1986 and 2000 and a narrowing of the gap between male and female rates. (ANNOTATION)
An Ultrasensitive Analytical Method Based on Chemiluminescence Sensing Electrochemical Parallel Catalytic Reaction Event
An ultrasensitive electrochemiluminescence (ECL) method on the combination of electrochemical parallel catalytic reaction and chemiluminesence signal sensing was proposed for improving ECL analytical characteristics using vanadate(V) as a representative. Vanadate(V) could be electrochemically reduced to generate vanadate(II) which could be chemically oxidized by potassium periodate to regenerate vanadate(V) and give parallel catalytic wave effect. Then, the reduced product of potassium periodate could react with butyl-rhodamine B to emit a sensitive chemiluminescence signal. The chemiluminescence intensity was correlative with vanadate(V) concentration. The investigation on the electrochemical reaction rate constant (k0) confirmed that the speed of electrochemical reaction was faster than that of the subsequent chemiluminescence reaction. The possibility of the combination of electrochemical parallel catalytic reaction with chemiluminescence signal sensing was proved. The similar ECL behaviors could be observed at zirconia nanowires-Nafion modified electrode. Because of the separation and enrichment effect of the modified electrode on vanadate(V), the selectivity and sensitivity was further improved greatly. Based on these findings, a new concept on the combination of electrochemical parallel catalytic reaction and chemiluminesence signal sensing was proposed and an ultrasensitive ECL method for the determination of vanadate(V) was developed at zirconia nanowires-Nafion modified electrode. Under the optimum experimental conditions, the ECL intensity was linear with the concentration of vanadate(V) in the range of 2.0×10−12 mol/L–2.0×10−10 mol/L. The detection limit was 8.0×10−13 mol/L, which was more than 6 orders of magnitude lower than that observed by electrochemical current transduction for electrochemical parallel catalytic reaction at zirconia nanowires-Nafion modified electrode.