Photocatalytic oxygenation of sulfide using solar light and ingenious GQDs@AQ catalyst: Mechanistic and synthetic investigations.

The combination of excellent electronic properties and thermal stability positions orange-derived graphene quantum dots (GQDs) as promising materials for solar light-based applications. Researchers are actively exploring their potential in fields such as photovoltaics, photocatalysis, optoelectronics, and energy storage. Their abundance, cost-effectiveness, and eco-friendly nature further contribute to their growing relevance in cutting-edge scientific research. Furthermore, only GQDs are not much more effective in the UV-visible region, therefore, required band gap engineering in GQDs material. In this context, we designed GQDs-based light harvesting materials, which is active in UV-visible region. Herein we synthesized GQDs coupled with 2,6-diaminoanthrquninone (AQ), that is, GQDs@AQ light harvesting photocatalyst the first time for the oxidation of sulfide to sulfoxide under visible light. For the integrating reactions of sulfide in aerobic conditions under visible light by GQDs@AQ photocatalyst exhibit utmost higher photocatalytic activity than simple GQDs due to low molar extinction coefficient and slow recombination charges. The use of GQDs@AQ light harvesting photocatalyst, showed the excellent organic transformation efficiency of sulfide to sulfoxide with excellent yield (94%). The high efficiency and excellent yield of 94% indicate the effectiveness of GQDs@AQ as a photocatalyst for these specific organic transformations.

Assessment of knowledge and perceptions toward generic medicines among basic science undergraduate medical students at Aruba.

OBJECTIVE: Use of generic medicines is important to reduce rising health-care costs. Proper knowledge and perception of medical students and doctors toward generic medicines are important. Xavier University School of Medicine in Aruba admits students from the United States, Canada, and other countries to the undergraduate medical (MD) program. The present study was conducted to study the knowledge and perception about generic medicines among basic science MD students. MATERIALS AND METHODS: The cross-sectional study was conducted among first to fifth semester students during February 2015. A previously developed instrument was used. Basic demographic information was collected. Respondent's agreement with a set of statements was noted using a Likert-type scale. The calculated total score was compared among subgroups of respondents. One sample Kolmogorov-Smirnov test was used to study the normality of distribution, Independent samples t-test to compare the total score for dichotomous variables, and analysis of variance for others were used for statistical analysis. RESULTS: Fifty-six of the 85 students (65.8%) participated. Around 55% of respondents were between 20 and 25 years of age and of American nationality. Only three respondents (5.3%) provided the correct value of the regulatory bioequivalence limits. The mean total score was 43.41 (maximum 60). There was no significant difference in scores among subgroups. CONCLUSIONS: There was a significant knowledge gap with regard to the regulatory bioequivalence limits for generic medicines. Respondents' level of knowledge about other aspects of generic medicines was good but could be improved. Studies among clinical students in the institution and in other Caribbean medical schools are required. Deficiencies were noted and we have strengthened learning about generic medicines during the basic science years.

Intraoperative and Immediate Postoperative Outcomes of Cataract Surgery using Phacoemulsification in Eyes with and without Pseudoexfoliation Syndrome.

BACKGROUND: To compare the intraoperative and immediate postoperative behavior and complications in eyes with pseudoexfoliation (PEX) syndrome with eyes having senile cataract without PEX during cataract surgery using phacoemulsification (PKE). MATERIALS AND METHODS: In this prospective study, 68 eyes of 68 patients were divided into two groups: Group 1 (test) comprised 34 eyes with immature senile cataract with PEX and Group 2 (control) included 34 eyes with immature senile cataract without PEX and any coexisting ocular pathology. Phacoemulsification (modern cataract surgery) was performed on both groups through stop and chop technique and comparative analysis of the incidence of intraoperative and immediate postoperative complications was made. RESULTS: There was no significant difference in rates of intraoperative complications between PEX (2.9%) and Control (0%) group. The mean pupil diameter was significantly smaller in Group 1 (p<0.001). No eye in either group had phacodonesis. 58.8% of eyes in Group 1 and 29.4% in Group 2 had a harder cataract (nuclear sclerosis) ≥ grade 3 (p=0.017). PKE was performed in all eyes with cataract in both groups. Intraoperative complication (zonular dialysis (dehiscence) was encountered in only 2.9% (1 case) of eyes with PEX. PC (posterior capsule) tear (rent) with vitreous loss was seen in 2.9% eyes of Group 1 and none in Group 2. Postoperatively, IOP (intraocular pressure) and aqueous flare response were comparable between the groups. Significantly higher inflammatory cell response was observed in Group 1 (p=0.014). BCVA (best corrected visual acuity) using Snellen chart with pinhole on postoperative day1 was significantly better in the control group compared to the group with PEX (p=0.027). CONCLUSION: Phacoemulsification can be safely performed by experienced hands in cataractous eyes with PEX. The incidence of intraoperative and immediate post-operative complications in eyes with PEX was not significantly different compared to eyes without PEX in our study. Further studies among a larger population are required.

Student perception about working in rural United States/Canada after graduation: a study in an offshore Caribbean medical school.

INTRODUCTION: Rural residents of the United States (US) and Canada face problems in accessing healthcare. International medical graduates (IMGs) play an important role in delivering rural healthcare. IMGs from Caribbean medical schools have the highest proportion of physicians in primary care.  Xavier University School of Medicines admits students from the US, Canada and other countries to the undergraduate medical (MD) course and also offers a premedical program. The present study was conducted to obtain student perception about working in rural US/Canada after graduation.   METHODS: The study was conducted among premedical and preclinical undergraduate medical (MD) students during October 2014. The questionnaire used was modified from a previous study. Semester of study, gender, nationality, place of residence and occupation of parents were noted. Information about whether students plan to work in rural US/Canada after graduation, possible reasons why doctors are reluctant to work in rural areas, how the government can encourage rural practice, possible problems respondents anticipate while working in rural areas were among the topics studied. RESULTS: Ninety nine of the 108 students (91.7%) participated. Forty respondents were in favor of working in rural US/Canada after graduation. Respondents mentioned good housing, regular electricity, water supply, telecommunication facilities, and schools for education of children as important conditions to be fulfilled. The government should provide higher salaries to rural doctors, help with loan repayment, and provide opportunities for professional growth.  Potential problems mentioned were difficulty in being accepted by the rural community, problems in convincing patients to follow medical advice, lack of exposure to rural life among the respondents, and cultural issues. CONCLUSIONS: About 40% of respondents would consider working in rural US/Canada. Conditions required to be fulfilled have been mentioned above. Graduates from Caribbean medical schools have a role in addressing rural physician shortage. Similar studies in other offshore Caribbean medical schools are required as Caribbean IMGs make an important contribution to the rural US and Canadian health workforce.

Students' perception of the learning environment at Xavier University School of Medicine, Aruba.

PURPOSE: The learning environment at Xavier University School of Medicine (XUSOM), Aruba has not been previously studied. Hence, the present study was carried out using the Dundee Ready Education Environment Measure (DREEM) to obtain student perceptions about the learning environment and compare the same among different subgroups of respondents. METHODS: The questionnaire was administered to undergraduate medical students in their first to fifth semester during the first two weeks of June 2013. The students' perceptions were evaluated by noting their degree of agreement with a set of 50 statements using a Likert-type scale. The mean overall score and the scores of subcategory were calculated and compared among different respondents (P<0.05). RESULTS: Seventy-three of the 86 students (84.9%) completed the questionnaire. The overall mean±SD score was 131.79±22.86 (maximum score 200). The mean±SD score for students' perception of teaching/learning was 31.99±6.23 (maximum score, 48), while the score for students' perceptions of teachers was 30.05±5.54 (maximum score, 44). The mean±SD scores for students' academic self-perception, students' perception of the atmosphere, and students' social self-perception were 21.88±5.11 (maximum score, 32), 30.92±8.59 (maximum score, 48), and 16.96±4.71 (maximum score, 28), respectively. There were no differences in scores according to the respondents' personal characteristics. CONCLUSION: The student responses about the learning environment at the institution were positive. We plan to obtain regular student feedback as the curriculum becomes progressively more student-centered and integrated.

Reading habits and attitude toward medical humanities of basic science students in a medical college in Western Nepal.

BACKGROUND: The Manipal College of Medical Sciences, Pokhara, Nepal, admits students from Nepal, India, Sri Lanka, and other countries to the undergraduate medical course. PURPOSES: The present study sought to describe and explore reading habits of medical students during the first three semesters and obtain their views regarding inclusion of medical humanities in the course. METHODS: The authors introduced a voluntary module in medical humanities to the fifth- and sixth-semester students. Gender, semester, and nationality of respondents were noted. Commonly read noncourse books (fiction and nonfiction) were noted. Student attitudes toward medical humanities were studied using a set of nine statements. A total of 165 of the 220 students (75%) participated. Indians followed by Nepalese were the most common nationalities. RESULTS: Romantic fiction and biography were most commonly read. The Alchemist and The Da Vinci Code were commonly read books. Students were in favor of inclusion of medical humanities in the curriculum. The median total score was 30 (maximum possible score = 45). CONCLUSIONS: Students read widely beyond their course. The possibility of introducing medical humanities in the curriculum should be explored.

Science attitudes and knowledge among preclinical medical students in Pokhara, Nepal.

Knowledge of science and the scientific method are important in learning about and using evidence-based medicine in practice. Courses in research methodology have been introduced for both medical students and practicing doctors. In Pokhara, the basic science subjects are taught in an integrated manner during the first four semesters of the undergraduate medical course. Studies on students' attitudes towards and knowledge of science are lacking in medical colleges in Nepal. Hence the study was carried out to obtain information on students' attitude towards and knowledge of science and scientific methodology among preclinical medical students and note the association, if any, of students' attitudes and their demographic characteristics. The study was carried out in March 2005 among the students of the first four semesters at the Manipal College of Medical Sciences, Pokhara, Nepal using a questionnaire developed by Hren and coworkers. Two hundred and twenty students (overall response rate 73.3%) successfully completed the questionnaire. Seventy-five respondents were Nepalese, 115 were Indians, 27 were Sri Lankans and 3 belonged to other nationalities. The X +/- SD total attitude score was 147.4 +/- 10.8 (neutral score 135). The X +/- SD scores on the subscales, value of science to humanity, value of scientific methodology and value of science to medicine were 51.3 +/- 5.4, 39.6 +/- 3.7 and 58.5 +/- 5.9 (neutral scores were 36, 51 and 48 respectively). The knowledge score measured using a set of 8 multiple choice questions was 3.3 +/- 1.4. The attitude scores were lower and the knowledge score was comparable to that reported previously in a study in Croatia but higher than that reported from Southeast Europe.

Fluoroquinolone utilization among inpatients in a teaching hospital in western Nepal.

OBJECTIVE: To obtain information on the prescribing patterns of fluoroquinolones among hospitalized patients, other antibiotics and drugs co-prescribed, calculate fluoroquinolone utilization using defined daily dose (DDD), calculate mean cost of drugs and detail the sensitivity patterns of isolated microorganisms. METHODS: The study was carried out over a five-month period (1st November 2003 to 31st March 2004) at the Manipal Teaching Hospital, Pokhara, Nepal. Demographic details and duration of hospitalization was noted. The percentage of patients prescribed parenteral antibiotics and fluoroquinolones were recorded. The cost of drugs was determined using the price list supplied by the pharmacy. Fluoroquinolone utilization was measured in DDD/100 bed-days. RESULTS: Fluoroquinolones were prescribed to 263 patients during the study period; 160 females and 103 males. Mean +/- SD number of drugs prescribed and duration of hospitalization were 6.5 +/- 3.3 and 6.2 +/- 5.4 days respectively. Fluoroquinolone utilization was 7.76 DDD/100 bed-days. Ciprofloxacin was the most commonly prescribed drug (6.83 DDD/100 bed-days). Fluoroquinolones were used for prophylaxis in 110 patients (41.8%). Other indications were urinary tract infections and acute gastroenteritis. E.coli, S.aureus and P. aeruginosa were common organisms isolated. The mean cost of drugs was 13.1 U.S. $ and fluoroquinolones contributed to 36.7% of the total drug costs. CONCLUSION: The use of fluoroquinolones was high compared to that reported previously.

Student attitudes towards communication skills training in a medical college in Western Nepal.

CONTEXT: Previous studies have shown that students have both positive and negative attitudes towards communication skills training. However, studies in Nepal are lacking. OBJECTIVES: The present study was carried out to determine the positive and negative attitudes of student respondents using the previously validated communication skills attitude scale (CSAS) (see Appendix). METHODS: The study was carried out among third- and fourth-semester students at the Manipal College of Medical Sciences, Pokhara, Nepal. These students are in the pre-clinical part of their course and learn the basic science subjects through an integrated, system-based curriculum. Gender, age, nationality of the respondents, occupation of parents, medium of instruction at school, attitude towards communication skills training during the clinical years, and self-rating of communication abilities were recorded. Association of the positive and negative attitudes with these variables was determined using appropriate statistical tests (p < 0.05). FINDINGS: A total of 123 students participated in the study; 74 (60.2%) were male, and 104 (84.5%) had studied in English-medium schools. The median positive attitude score was 51 (inter-quartile range 7). Nationality and attitude towards communication skills training during the clinical years showed a significant association. The mean negative attitude scale score was 31.18 (SD = 4.96). A significant association was noted with attitude towards communication skills training during the clinical years. Both scales range from 13-65, with higher scores indicating stronger attitudes. CONCLUSIONS: Communication skills training should be modified and strengthened. Formal courses during the clinical years are required. Training sessions for the faculty and further studies across different semesters and in different medical colleges in Nepal are needed.

Morbidity profile, prescribing patterns and working of the community drug programme in a health post in Western Nepal.

The study was carried out at the Naudanda Health Post over a two-month period (July 15, 2000, to September 15, 2000). The objectives were to obtain information on the demography of patients, morbidity, drug-prescribing patterns and the working of the Community Drug Programme. Acute respiratory infections were the most common illness. Paracetamol was most commonly prescribed and 80.6% of the drugs prescribed were essential drugs.