edwin gomez - Academia.edu (original) (raw)
Papers by edwin gomez
Journal of Amateur Sport, 2022
Running, as a form of leisure time physical activity is generally popular due to its low-cost ent... more Running, as a form of leisure time physical activity is generally popular due to its low-cost entry, easy access to practice, and the convenience and accessible nature of the activity. Specifically, one type of running experience sought by many is charitable running or running for a cause (i.e., cause-related sport event). While there is a growing body of literature on charity sport events, little is known about how the charitable motives and participant identity with the event affect future behaviors associated with the cause and the event. Grounded in identity theory, the purpose of this article was to examine the effect of salient identities and charitable motives on future intentions associated with a cause-related event. Data were collected from the second annual Norfolk Freedom Half Marathon, in Virginia, via an online survey that was sent to all registered runners (1,372) one week after the race and 557 participants responded. We found charity motives to be the dominant influ...
La acuaponia es la interaccion del cultivo de peces y plantas en un mismo sistema, en donde se ge... more La acuaponia es la interaccion del cultivo de peces y plantas en un mismo sistema, en donde se genera un beneficio mutuo. En Colombia, en la actualidad, esta practica no es muy conocida, por lo que estudios como este, son de gran importancia a nivel cientifico, para generar experiencia en este tema. Lo que se busco con este trabajo fue definir de forma preliminar el crecimiento de peces (goldfish Carrasius auratus -) y plantas (lechuga – Lactuca sativa -), y el comportamiento de algunos de los parametros fisicoquimicos principales que involucran los sistemas acuaponicos, en un caso especifico goldfish-lechuga, sin tratar de controlar ni el pH, ni los niveles de los diferentes micro y macro elementos (nutrientes). Se definio el crecimiento y supervivencia de los peces, comparandolos con peces cultivados en sistemas de recirculacion, asi mismo el crecimiento de las lechugas, fue comparado con un control hidroponico. Adicionalmente, en el momento de la cosecha de las lechugas, se carac...
Journal of Youth Development, 2012
This study examined the impact of an afterschool program on resilience in youth at an elementary ... more This study examined the impact of an afterschool program on resilience in youth at an elementary school in Central NY. The goals of the program were to: (a) increase resiliency among participants, and (b) reduce the occurrence of aggressive behaviors (i.e., bullying) in 5th and 6th graders. Of the 79 students who completed the survey, 19 participants were able to be matched with pre- and posttests. In the study, 13 as participants in the afterschool program, and six as non-participants. Results of paired samples t-tests indicated that those who participated in the afterschool program showed a significant increase (p= 0.05) in resiliency scores. The program also had a positive impact on decreasing discipline-related referrals.
Revista Facultad Nacional De Salud Publica, Dec 1, 2013
Proyecto académico sin fines de lucro, desarrollado bajo la iniciativa de acceso abierto
We study the effect of networks of non-covalent interactions on the conformational dynamics of th... more We study the effect of networks of non-covalent interactions on the conformational dynamics of the Streptococcus pneumoniae virulence factor, PfbA. Multi-microsecond molecular dynamics simulations of the apo, Ca2+-bound and Mn2+/Ca2+-bound surface –binding protein in water and sugar solutions help identify potential glycan recognition sites and develop a hypothesis for the mechanism of surface binding. We find that while residues in the β-domain of PfbA remain rigid over the course of microseconds, residues in the α/β domain undergo a bending movement akin to a swinging pendulum. Surprising, metal ion binding has a limited effect on the conformational dynamics of the protein. We identify networks of non-covalent interactions including hydrogen bonds and π-π stacks motifs that are maintained over the course of our simulations. We further model the entire protein to develop a hypothesis of how the α domain is involved in signaling and protein recognition. Our quantum mechanical calculations determine that a strong cooperative effect is present in hydrogen bonding pathways containing asparagine residues that accounts for an almost 20% increase in hydrogen bond strength. Our calculations further suggest that moderate amounts of charge transfer across these networks may likely contribute to this phenomenon. A Ramachandran analysis finds that residues in the region connecting the two domains alternated between β-sheets and α-helix like conformations. Our analyses find the α-helical regions around Gly184 and Gln185 to undergo conformational changes that may play a role in plasminogen binding. Our simulations further find support for a putative carbohydrate-binding site. Conformations of PfbA docked against plasminogen expand our understanding of the interaction at this interface. Overall, our study provides insights that will help develop a pharmaceutical means to inhibit S. pneumonia virulence
Revista Facultad Nacional De Salud Publica, Aug 14, 2013
Proyecto académico sin fines de lucro, desarrollado bajo la iniciativa de acceso abierto
Illuminare a Student Journal in Recreation Parks and Tourism Studies, Dec 19, 2013
This study examines the Resiliency Attitudes and Skills Profile (RASP) in an afterschool recreati... more This study examines the Resiliency Attitudes and Skills Profile (RASP) in an afterschool recreation program with sixth grade students (N=137). The purpose of the study was to inspect the psychometric properties of the RASP and the internal consistency of the RASP global scale and subscales. This article expands on research reported on the RASP. Findings suggest that the RASP measures aspects of resiliency along four factors/dimensions. Suggestions for future research are provided.
Illuminare a Student Journal in Recreation Parks and Tourism Studies, Apr 20, 2015
This pilot study examined the impact of an outdoor orientation program (First Ascent) on particip... more This pilot study examined the impact of an outdoor orientation program (First Ascent) on participants' level of transference, resilience, well-being and transition to college. Pre and posttest instruments were administered during a fourday college outdoor orientation program, as well as an open-ended series of questions. Nonparametric tests revealed significant differences from the pre-and posttest of the measures on skill transference and resiliency. Additional, individual items from each questionnaire were examined.
Journal of Unconventional Parks Tourism Recreation Research, 2008
Challenge courses have become increasingly popular in recent years. Many groups are turning to ha... more Challenge courses have become increasingly popular in recent years. Many groups are turning to half-day challenge courses due to time and financial constraints. Yet, few studies have quantified the benefits of a half-day course. The purpose of this study was to examine the effects of participation in a four-hour challenge course on leadership efficacy and work efficacy of college students. Pretest, posttest, and follow-up questionnaires were utilized. T-test analyses found that participating in a challenge course has a significant positive effect on increasing one's leadership and work efficacy from pretest to posttest, after participation in a four-hour challenge course. This research also demonstrates that increased levels of the participants' self-efficacy remained six weeks after the completion of the challenge course.
Physical & Health …, 2010
A Benefits-Based S tudy of Appalachian Trail Users: Validation and Application of the Benefits of... more A Benefits-Based S tudy of Appalachian Trail Users: Validation and Application of the Benefits of Hiking S cale Étude des bienfaits pour les randonneurs du Sentier des Appalaches : Validation et application de l'échelle de bienfaits
World Leisure Journal, 2002
This study examined Puerto Ricans in central Massachusetts, USA, and explored issues of accultura... more This study examined Puerto Ricans in central Massachusetts, USA, and explored issues of acculturation, park use, and the perception of benefits provided by public parks. A process for gaining access to, and garnering support from, the Puerto Rican community is discussed. The key elements of this process is bilingualism, key informants, and community involvement. The relationships between acculturation (ACC), perceived benefits of recreation (BEN), and recreation participation/park use (REC) were explored. Scales were developed for ACC, BEN, and REC. ACC was found to be a very reliable scale, and suggestions for future use are made. Additionally, differences in high, moderate, and low users and highly acculturated, bicultural, and slightly acculturated individuals were explored. Contrary to earlier research, the analyses indicate that lesser acculturated Puerto Ricans use parks substantially more than higher acculturated Puerto Ricans. Findings also indicate that the higher acculturation levels perceive less benefits derived from recreation. Implications of these findings are discussed.
European Journal of Pharmacology: Molecular Pharmacology, 1991
Dopamine is shown to stimulate cAMP accumulation in COS-1 cells via endogenously expressed dopami... more Dopamine is shown to stimulate cAMP accumulation in COS-1 cells via endogenously expressed dopamine Dt receptors. A dissociation of dopamine and fl-adrenoceptor responses is demonstrated by the use of selective antagonists and different desensitization patterns following exposure of the cells to dopamine or the/3-adrenoceptor agonist, isoproterenol. The dopamine response in COS-I cells exhibits a pharmacological profile similar to that found in dopamine Dj tissues such as rat striatum and fish retina. The presence of DARPP-32 (dopamine-and cAMP-regulated phosphoprotein, M r 32,000) immunoreactivity in COS-I cells is shown by Western blotting and is consistent with the endogenous expression of a dopamine I)~ receptor in these cells. It is concluded that a dopamine D~ receptor is expressed in COS-1 cells and the implications of this arc discussed.
European Journal of Pharmacology, 1991
S,6-dihydroxy-3-phenylisochroman HCI, is a potent UZC5,, = 2.5 nM1, partial (intrinsic activity =... more S,6-dihydroxy-3-phenylisochroman HCI, is a potent UZC5,, = 2.5 nM1, partial (intrinsic activity = 66% of dopamine) agonist in the fish retina dopamine-sensitive adenylate cyclase model of the D, dopamine receptor. In the rat caudate-putamen model of the D, dopamine receptor, A68930 is a potent (EC,,, = 2.1 nM) full agonist. In contrast, A68930 is a much weaker (ECs,, = 3920 nM) full agonist in a biochemical model of the dopamine D2 receptor. The orientation of the 3-phenyl substituent in the molecule is critical for the affinity and selectivity of the molecule towards the dopaminc D, receptor. A68930 also displays weak a,-agonist activity but the molecule is virtually inactive at the ty,and ~-adrcn~cc~tors. When tested in rats bearing a unilateral 6-OWDA lesion of the Negro-neostriatal neurons. A68930 elicits prolonged (> 20 h) contralateral turning that is antagonized by dopaminc D, receptor selective doses of SCH 23390 but not by D, receptor selective doses of haloperidol. In this lesioned rat model, A68930 increases Z-deoxyglucose accumulation in the lesioncd substantia nigra. pars reticulata. When tested in normal rats, A68930 elicits hyperactivity and, at higher doses. produces a forelimb clonus.
Journal of Amateur Sport, 2022
Running, as a form of leisure time physical activity is generally popular due to its low-cost ent... more Running, as a form of leisure time physical activity is generally popular due to its low-cost entry, easy access to practice, and the convenience and accessible nature of the activity. Specifically, one type of running experience sought by many is charitable running or running for a cause (i.e., cause-related sport event). While there is a growing body of literature on charity sport events, little is known about how the charitable motives and participant identity with the event affect future behaviors associated with the cause and the event. Grounded in identity theory, the purpose of this article was to examine the effect of salient identities and charitable motives on future intentions associated with a cause-related event. Data were collected from the second annual Norfolk Freedom Half Marathon, in Virginia, via an online survey that was sent to all registered runners (1,372) one week after the race and 557 participants responded. We found charity motives to be the dominant influ...
La acuaponia es la interaccion del cultivo de peces y plantas en un mismo sistema, en donde se ge... more La acuaponia es la interaccion del cultivo de peces y plantas en un mismo sistema, en donde se genera un beneficio mutuo. En Colombia, en la actualidad, esta practica no es muy conocida, por lo que estudios como este, son de gran importancia a nivel cientifico, para generar experiencia en este tema. Lo que se busco con este trabajo fue definir de forma preliminar el crecimiento de peces (goldfish Carrasius auratus -) y plantas (lechuga – Lactuca sativa -), y el comportamiento de algunos de los parametros fisicoquimicos principales que involucran los sistemas acuaponicos, en un caso especifico goldfish-lechuga, sin tratar de controlar ni el pH, ni los niveles de los diferentes micro y macro elementos (nutrientes). Se definio el crecimiento y supervivencia de los peces, comparandolos con peces cultivados en sistemas de recirculacion, asi mismo el crecimiento de las lechugas, fue comparado con un control hidroponico. Adicionalmente, en el momento de la cosecha de las lechugas, se carac...
Journal of Youth Development, 2012
This study examined the impact of an afterschool program on resilience in youth at an elementary ... more This study examined the impact of an afterschool program on resilience in youth at an elementary school in Central NY. The goals of the program were to: (a) increase resiliency among participants, and (b) reduce the occurrence of aggressive behaviors (i.e., bullying) in 5th and 6th graders. Of the 79 students who completed the survey, 19 participants were able to be matched with pre- and posttests. In the study, 13 as participants in the afterschool program, and six as non-participants. Results of paired samples t-tests indicated that those who participated in the afterschool program showed a significant increase (p= 0.05) in resiliency scores. The program also had a positive impact on decreasing discipline-related referrals.
Revista Facultad Nacional De Salud Publica, Dec 1, 2013
Proyecto académico sin fines de lucro, desarrollado bajo la iniciativa de acceso abierto
We study the effect of networks of non-covalent interactions on the conformational dynamics of th... more We study the effect of networks of non-covalent interactions on the conformational dynamics of the Streptococcus pneumoniae virulence factor, PfbA. Multi-microsecond molecular dynamics simulations of the apo, Ca2+-bound and Mn2+/Ca2+-bound surface –binding protein in water and sugar solutions help identify potential glycan recognition sites and develop a hypothesis for the mechanism of surface binding. We find that while residues in the β-domain of PfbA remain rigid over the course of microseconds, residues in the α/β domain undergo a bending movement akin to a swinging pendulum. Surprising, metal ion binding has a limited effect on the conformational dynamics of the protein. We identify networks of non-covalent interactions including hydrogen bonds and π-π stacks motifs that are maintained over the course of our simulations. We further model the entire protein to develop a hypothesis of how the α domain is involved in signaling and protein recognition. Our quantum mechanical calculations determine that a strong cooperative effect is present in hydrogen bonding pathways containing asparagine residues that accounts for an almost 20% increase in hydrogen bond strength. Our calculations further suggest that moderate amounts of charge transfer across these networks may likely contribute to this phenomenon. A Ramachandran analysis finds that residues in the region connecting the two domains alternated between β-sheets and α-helix like conformations. Our analyses find the α-helical regions around Gly184 and Gln185 to undergo conformational changes that may play a role in plasminogen binding. Our simulations further find support for a putative carbohydrate-binding site. Conformations of PfbA docked against plasminogen expand our understanding of the interaction at this interface. Overall, our study provides insights that will help develop a pharmaceutical means to inhibit S. pneumonia virulence
Revista Facultad Nacional De Salud Publica, Aug 14, 2013
Proyecto académico sin fines de lucro, desarrollado bajo la iniciativa de acceso abierto
Illuminare a Student Journal in Recreation Parks and Tourism Studies, Dec 19, 2013
This study examines the Resiliency Attitudes and Skills Profile (RASP) in an afterschool recreati... more This study examines the Resiliency Attitudes and Skills Profile (RASP) in an afterschool recreation program with sixth grade students (N=137). The purpose of the study was to inspect the psychometric properties of the RASP and the internal consistency of the RASP global scale and subscales. This article expands on research reported on the RASP. Findings suggest that the RASP measures aspects of resiliency along four factors/dimensions. Suggestions for future research are provided.
Illuminare a Student Journal in Recreation Parks and Tourism Studies, Apr 20, 2015
This pilot study examined the impact of an outdoor orientation program (First Ascent) on particip... more This pilot study examined the impact of an outdoor orientation program (First Ascent) on participants' level of transference, resilience, well-being and transition to college. Pre and posttest instruments were administered during a fourday college outdoor orientation program, as well as an open-ended series of questions. Nonparametric tests revealed significant differences from the pre-and posttest of the measures on skill transference and resiliency. Additional, individual items from each questionnaire were examined.
Journal of Unconventional Parks Tourism Recreation Research, 2008
Challenge courses have become increasingly popular in recent years. Many groups are turning to ha... more Challenge courses have become increasingly popular in recent years. Many groups are turning to half-day challenge courses due to time and financial constraints. Yet, few studies have quantified the benefits of a half-day course. The purpose of this study was to examine the effects of participation in a four-hour challenge course on leadership efficacy and work efficacy of college students. Pretest, posttest, and follow-up questionnaires were utilized. T-test analyses found that participating in a challenge course has a significant positive effect on increasing one's leadership and work efficacy from pretest to posttest, after participation in a four-hour challenge course. This research also demonstrates that increased levels of the participants' self-efficacy remained six weeks after the completion of the challenge course.
Physical & Health …, 2010
A Benefits-Based S tudy of Appalachian Trail Users: Validation and Application of the Benefits of... more A Benefits-Based S tudy of Appalachian Trail Users: Validation and Application of the Benefits of Hiking S cale Étude des bienfaits pour les randonneurs du Sentier des Appalaches : Validation et application de l'échelle de bienfaits
World Leisure Journal, 2002
This study examined Puerto Ricans in central Massachusetts, USA, and explored issues of accultura... more This study examined Puerto Ricans in central Massachusetts, USA, and explored issues of acculturation, park use, and the perception of benefits provided by public parks. A process for gaining access to, and garnering support from, the Puerto Rican community is discussed. The key elements of this process is bilingualism, key informants, and community involvement. The relationships between acculturation (ACC), perceived benefits of recreation (BEN), and recreation participation/park use (REC) were explored. Scales were developed for ACC, BEN, and REC. ACC was found to be a very reliable scale, and suggestions for future use are made. Additionally, differences in high, moderate, and low users and highly acculturated, bicultural, and slightly acculturated individuals were explored. Contrary to earlier research, the analyses indicate that lesser acculturated Puerto Ricans use parks substantially more than higher acculturated Puerto Ricans. Findings also indicate that the higher acculturation levels perceive less benefits derived from recreation. Implications of these findings are discussed.
European Journal of Pharmacology: Molecular Pharmacology, 1991
Dopamine is shown to stimulate cAMP accumulation in COS-1 cells via endogenously expressed dopami... more Dopamine is shown to stimulate cAMP accumulation in COS-1 cells via endogenously expressed dopamine Dt receptors. A dissociation of dopamine and fl-adrenoceptor responses is demonstrated by the use of selective antagonists and different desensitization patterns following exposure of the cells to dopamine or the/3-adrenoceptor agonist, isoproterenol. The dopamine response in COS-I cells exhibits a pharmacological profile similar to that found in dopamine Dj tissues such as rat striatum and fish retina. The presence of DARPP-32 (dopamine-and cAMP-regulated phosphoprotein, M r 32,000) immunoreactivity in COS-I cells is shown by Western blotting and is consistent with the endogenous expression of a dopamine I)~ receptor in these cells. It is concluded that a dopamine D~ receptor is expressed in COS-1 cells and the implications of this arc discussed.
European Journal of Pharmacology, 1991
S,6-dihydroxy-3-phenylisochroman HCI, is a potent UZC5,, = 2.5 nM1, partial (intrinsic activity =... more S,6-dihydroxy-3-phenylisochroman HCI, is a potent UZC5,, = 2.5 nM1, partial (intrinsic activity = 66% of dopamine) agonist in the fish retina dopamine-sensitive adenylate cyclase model of the D, dopamine receptor. In the rat caudate-putamen model of the D, dopamine receptor, A68930 is a potent (EC,,, = 2.1 nM) full agonist. In contrast, A68930 is a much weaker (ECs,, = 3920 nM) full agonist in a biochemical model of the dopamine D2 receptor. The orientation of the 3-phenyl substituent in the molecule is critical for the affinity and selectivity of the molecule towards the dopaminc D, receptor. A68930 also displays weak a,-agonist activity but the molecule is virtually inactive at the ty,and ~-adrcn~cc~tors. When tested in rats bearing a unilateral 6-OWDA lesion of the Negro-neostriatal neurons. A68930 elicits prolonged (> 20 h) contralateral turning that is antagonized by dopaminc D, receptor selective doses of SCH 23390 but not by D, receptor selective doses of haloperidol. In this lesioned rat model, A68930 increases Z-deoxyglucose accumulation in the lesioncd substantia nigra. pars reticulata. When tested in normal rats, A68930 elicits hyperactivity and, at higher doses. produces a forelimb clonus.