In-situ Transesterification of Microalgal Lipid using Acid-functionalized Carbon Nanotube as Catalyst

Alva DURIAN,Joseph AURESENIA 한국생물공학회 2016 한국생물공학회 학술대회 Vol.2016 No.4

Later Chronotype Correlates With Severe Depression in Indonesian College Students

Supit Alva,Gosal Merry,Mamuaja Prycilia,Kumaat Sicilia,Paturusi Achmad 대한수면학회 2021 sleep medicine research Vol.12 No.2

Background and Objective The correlation between late chronotype and depression has been well documented, but reports from the equatorial area, where the sun shines throughout the year with less seasonal variation, are limited. In the present research study, we sought to 1) examine the relationship between the chronotype and mental health symptoms in an Indonesian student population and 2) explore the characteristics of those who lie at the extreme chronotype and psychometry.Methods This is a cross-sectional questionnaire-based study including undergraduate students in an Indonesian university (n = 493). We used the Munich Chronotype Questionnaires and the Depression, Anxiety, and Stress Scale to assess the chronotype and mental symptoms, respectively. Following this, a follow-up with an in-depth interview on the selected population at the extreme end of the chronotype was performed as an exploratory approach to identify their common characteristics.Results Among the tested parameters, the depression score was significantly associated with chronotype (p = 0.003), replicating previous findings from other areas with higher latitudes. The correlation persisted when males and females were analyzed separately (p = 0.008 and 0.037, respectively). A follow-up qualitative analysis revealed a potential subclinical, unrealized depression among the subjects; our findings revealed the use of smartphones during or before bedtime as a common factor among those with later chronotypes.Conclusions There is a correlation between depression score and chronotype among Indonesian college students, where subjects with later chronotype are more likely to have a higher depression score.

브라질의 정책결정구조 : 문제와 전망

Maria D'Alva Gil Kinzo 한국행정학회 1994 한국행정학회 학술발표논문집 Vol.1994 No.-

Los Pueblos Indígenas de Chiapas, Atlas Etnográfico: una reseña

Socorro Del Pilar Jimenez Alva 부산외국어대학교 중남미지역원 2012 이베로아메리카 Vol.14 No.2

The coordinators of the “Atlas Etnográfico de los Pueblos Indígenas de Chiapas” (The Indigenous Peoples of Chiapas, Ethnographic Atlas) are members of the “Frontera Sur” (Southern Border) team of “The Indigenous Regions of Mexico in the New Millenium,” a national project of the National Institute of Anthropology and History (INAH). In this magnificent 521-page volume the authors introduce the reader to the indigenous world in the state of Chiapas. This work provides invaluable information including critical analyses of central aspects of indigenous culture and society. Themes including historical overviews, personhood, environment and land use, social organization, indigenous social movements, cosmovision, indigenous arts, health and disease, religious diversity, indigenous normative systems, and migration are treated systematically. In this review we summarize the contribution of the work and discuss various topics of interest.

Efficacy and Safety of Endoscopic Submucosal Dissection for Superficial Gastric Neoplasms: A Latin American Cohort Study

Fernando Palacios-Salas,Harold Benites-Goñi,Luis Marin-Calderón,Paulo Bardalez-Cruz,Jorge Vásquez-Quiroga,Edgar Alva-Alva,Bryan Medina-Morales,Jairo Asencios-Cusihuallpa 대한소화기내시경학회 2022 Clinical Endoscopy Vol.55 No.2

Background/Aims: Endoscopic submucosal dissection (ESD) is the preferred technique for treating early gastric cancer (EGC). However, very few studies have been conducted in South America. This study aimed to assess the efficacy and safety of ESD for EGC. Methods: We analyzed data from a prospective cohort from 2013 to 2020. A total of 152 superficial gastric neoplasms that fulfilledthe absolute or expanded criteria for ESD were included. Outcomes were en bloc, R0, and curative resection rates, incidence ofadverse events, and length of procedure. Results: The age of the enrolled patients was 68.4±11.3 years. The number of included patients based on the absolute and expandedindications was 150 and 2, respectively. En bloc, R0, and curative resections were achieved in 98.0%, 96.1%, and 89.5% of the cases,respectively. Bleeding and perforation were reported in 5.9% and 6.6% of the cases, respectively. Histopathological examinationrevealed low-grade dysplasia, high-grade dysplasia, well-differentiated adenocarcinoma, and poorly differentiated adenocarcinomain 13, 20, 117, and 2 cases, respectively. Conclusions: Our study shows that ESD performed by properly trained endoscopists in reference centers is safe and effective, withcomparable therapeutic outcomes to those reported in the Eastern series.

Inhibiting Effect of Nicotinic Acid Hydrazide on Corrosion of Aluminum and Mild Steel in Acidic Medium

Bhat, J. Ishwara,Alva, Vijaya D.P. Korean Chemical Society 2014 대한화학회지 Vol.58 No.1

The corrosion behavior of aluminum and mild steel in hydrochloric acid medium was studied using a nicotinic acid hydrazide as inhibitor by potentiodynamic polarization, electrochemical impedance spectroscopy technique and gravimetric methods. The effects of inhibitor concentration and temperature were investigated. The experimental results suggested, nicotinic acid hydrazide is a good corrosion inhibitor for both aluminum and mild steel in hydrochloric acid medium and the inhibition efficiency increased with increase in the inhibitor concentration. The polarization studies revealed that nicotinic acid hydrazide exhibits mixed type of inhibition. The inhibition was assumed to occur via adsorption of the inhibitor molecules on the aluminum and mild steel surface and inhibits corrosion by blocking the reaction sites on the surface of aluminum.

Use of radiotherapy in patients with palliative double bypass for locally advanced pancreatic adenocarcinoma

Glinka, Juan,Diaz, Federico,Alva, Augusto,Mazza, Oscar,Claria, Rodrigo Sanchez,Ardiles, Victoria,Santibanes, Eduardo de,Pekolj, Juan,Santibanes, Martin de The Korean Society for Radiation Oncology 2018 Radiation Oncology Journal Vol.36 No.3

Purpose: Pancreatic cancer (PC) has not changed overall survival in recent years despite therapeutic efforts. Surgery with curative intent has shown the best long-term oncological results. However, 80%-85% of patients with these tumors are unresectable at the time of diagnosis. In those patients, first therapeutic attempts are minimally invasive or surgical procedures to alleviate symptoms. The addition of radiotherapy (RT) to standard chemotherapy, ergo chemoradiation, in patients with locally advanced pancreatic cancer (LAPC) is still controversial. The study aims to compare outcomes in patients with a double bypass surgery due to LAPC treated or not with RT. Materials and Methods: A retrospective cohort study of patients with double bypass for LAPC were registered and divided into two groups: treated or not with postoperative RT. Baseline characteristics, postoperative complications, those related to RT and their relation to the main event (mortality) were compared. Results: Seventy-four patients were included. Surgical complications between the groups did not offer significant differences. Complications related to RT were mostly mild, and 86% of patients completed the treatment. Overall survival at 1 and 2 years for patients in the exposed group was 64% and 35% vs. 50% and 28% in the non-exposed group, respectively (p = 0.11; power 72%; hazard ratio = 0.53; 95% confidence interval, 0.24-1.18). Conclusion: We observed a tendency for survival improvement in patients with postoperative RT. However, we've not had enough power to demonstrate this difference, possibly due to the small sample size. It is indispensable to develop randomized and prospective trials to guide more specific treatment lines in this patients.

Inhibition Effect of Nevirapine an Antiretroviral on the Corrosion of Mild Steel Under Acidic Condition

Bhat, J. Ishwara,Alva, Vijaya D.P. Korean Chemical Society 2011 대한화학회지 Vol.55 No.5

Corrosion inhibition of mild steel by nevirapine, an antiretroviral has been investigated using potentiodynamic polarization, electrochemical impedance spectroscopy technique and weight loss methods. The experimental results suggested, nevirapine is a good corrosion inhibitor for mild steel in 1M hydrochloric acid medium and the inhibition efficiency increased with increase in inhibitor concentration. The kinetic parameters for corrosion process and thermodynamic parameters for adsorption process were calculated and discussed. The adsorption of the inhibitor on the surface of mild steel followed Langmuir adsorption isotherm.

Caregiving and Culture

T, J, McCallum,Erin Lea,Jessica Alva 한국노년학연구회 2010 한국 노년학연구 Vol.19 No.-

The sociocultural stress and coping model (SSCM) emphasizes the importance of cultural beliefs in the process of caregiving. The revised SSCM highlights a common core model can be seen across cultures and posits that specific cultural variables possess multidimensional characteristics. Research indicates that the culture-specific measures of familism, social support and stress-related growth may serve as good examples to apply the revised SSCM to Korean, Korean-American and African-American caregivers. Other culture-specific measures applying to other ethnic groups should continue to be sought out.

Use of radiotherapy in patients with palliative double bypass for locally advanced pancreatic adenocarcinoma

Juan Glinka,Federico Diaz,Augusto Alva,Oscar Mazza,Rodrigo Sanchez Claria,Victoria Ardiles,Eduardo de Santibañ,es,Juan Pekolj,Martí,n de Santibañ,es 대한방사선종양학회 2018 Radiation Oncology Journal Vol.36 No.3

Purpose: Pancreatic cancer (PC) has not changed overall survival in recent years despite therapeutic efforts. Surgery with curative intent has shown the best long-term oncological results. However, 80%–85% of patients with these tumors are unresectable at the time of diagnosis. In those patients, first therapeutic attempts are minimally invasive or surgical procedures to alleviate symptoms. The addition of radiotherapy (RT) to standard chemotherapy, ergo chemoradiation, in patients with locally advanced pancreatic cancer (LAPC) is still controversial. The study aims to compare outcomes in patients with a double bypass surgery due to LAPC treated or not with RT. Materials and Methods: A retrospective cohort study of patients with double bypass for LAPC were registered and divided into two groups: treated or not with postoperative RT. Baseline characteristics, postoperative complications, those related to RT and their relation to the main event (mortality) were compared. Results: Seventy-four patients were included. Surgical complications between the groups did not offer significant differences. Complications related to RT were mostly mild, and 86% of patients completed the treatment. Overall survival at 1 and 2 years for patients in the exposed group was 64% and 35% vs. 50% and 28% in the non-exposed group, respectively (p = 0.11; power 72%; hazard ratio = 0.53; 95% confidence interval, 0.24–1.18). Conclusion: We observed a tendency for survival improvement in patients with postoperative RT. However, we’ve not had enough power to demonstrate this difference, possibly due to the small sample size. It is indispensable to develop randomized and prospective trials to guide more specific treatment lines in this patients.