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Search Results: 1 - 10 of 7340 matches for " Biological relationships "
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Divergencia fenotípica en los oasis de San Pedro de Atacama, norte de Chile
Varela,Héctor H; Cocilovo,José A;
Estudios atacame?os , 2011, DOI: 10.4067/S0718-10432011000200006
Abstract: in this work we analyze the phenotypic differences among cemeteries from the prehistoric population of san pedro de atacama. the sample comprises 622 individuals, corresponding to early, middle, and late periods. we worked with 37 craniometric variables. the differences among ayllus were evaluated using multivariate analysis. the results indicate a significant differentiation during the early period. the differentiation among ayllus during the middle period is reduced. during the late period, there is a moderate increase of differences among sites.
Marvin Charton - Correlation Analyst Par Excellence
John Shorter
International Journal of Molecular Sciences , 2005, DOI: 10.3390/i6010003
Abstract: Since the late 1950s Marvin Charton, physical organic chemist, of Pratt Institute, Brooklyn, New York has studied structure-property relationships through correlation analysis, and has become one of the leading authorities in this field.
Scale-dependent effects of habitat area on species interaction networks: invasive species alter relationships
Sugiura Shinji,Taki Hisatomo
BMC Ecology , 2012, DOI: 10.1186/1472-6785-12-11
Abstract: Background The positive relationship between habitat area and species number is considered a fundamental rule in ecology. This relationship predicts that the link number of species interactions increases with habitat area, and structure is related to habitat area. Biological invasions can affect species interactions and area relationships. However, how these relationships change at different spatial scales has remained unexplored. We analysed understory plant–pollinator networks in seven temperate forest sites at 20 spatial scales (radius 120–2020 m) to clarify scale-associated relationships between forest area and plant–pollinator networks. Results The pooled data described interactions between 18 plant (including an exotic) and 89 pollinator (including an exotic) species. The total number of species and the number of interaction links between plant and pollinator species were negatively correlated with forest area, with the highest correlation coefficient at radii of 1520 and 1620 m, respectively. These results are not concordant with the pattern predicted by species–area relationships. However, when associations with exotic species were excluded, the total number of species and the number of interaction links were positively correlated with forest area (the highest correlation coefficient at a radius of 820 m). The network structure, i.e., connectance and nestedness, was also related to forest area (the highest correlation coefficients at radii of 720–820 m), when associations with exotics were excluded. In the study area, the exotic plant species Alliaria petiolata, which has invaded relatively small forest patches surrounded by agricultural fields, may have supported more native pollinator species than initially expected. Therefore, this invasive plant may have altered the original relationships between forest area and plant–pollinator networks. Conclusions Our results demonstrate scale-dependent effects of forest area on the size and structure of plant–pollinator networks. We also suggest that a single exotic plant species can impact plant–pollinator networks, even in temperate continental habitats.
Hypercompetitiveness and Relationships: Further Implications for Romantic, Family, and Peer Relationships  [PDF]
Bill Thornton, Richard M. Ryckman, Joel A. Gold
Psychology (PSYCH) , 2011, DOI: 10.4236/psych.2011.24043
Abstract: Romantic relationships of hypercompetitive individuals are much more problematic with greater conflict compared to those not so hypercompetitive; however, relationship satisfaction and commitment do not covary with hypercompetitiveness (Ryckman et al., 2002). Study 1 considered whether the type of commitment matters in a romantic relationship. Indeed, hypercompetitiveness was associated positively with constraint commitment (i.e., maintaining a relationship out of concern for one’s investment and other social-psychological costs associated with leaving), and was associated negatively with personal dedication commitment (i.e., interest in the relationship based on concerns for mutual benefit). Not only may the romantic relationships of hypercompetitive individuals be more problematic, other interpersonal relationships may be negatively impacted as well. Study 2 noted that hypercompetitiveness was associated positively with relationship problems involving both family members and peers; however, relationship closeness with family and friends did not vary with hypercompetitiveness. Implications of findings in both studies are considered.
Adolescents’ Interpersonal Relationships with Friends, Parents, and Teachers When Using Facebook for Interaction  [PDF]
Shih-Hsiung Liu, Mei-Chun Yin, Tsung-Hsien Huang
Creative Education (CE) , 2013, DOI: 10.4236/ce.2013.45049

The purpose of the study is to investigate the adolescents’ interpersonal relationships with friends, parents, and teachers when using Facebook for interaction. A total of 740 junior high school students were invited to fill in a questionnaire and 673 questionnaires were available. Data were analyzed using one-way analysis of variance and paired-samples t-test. The analytic result confirms that adolescents with high frequency use of Facebook for interactions can expand their interpersonal relationships with friends than those who with low frequency use, regardless of real-life or virtual relationships. However, their real-life interpersonal relationships with parents may weaken if overly use Internet tools for interactions. Another finding, eliminating the factor of the time on Facebook use, reveals that the adolescents’ real-life interpersonal relationships are stronger than virtual interpersonal relationships, regardless of with friends, parents, and teachers. Combining the above two findings, it is worth noting that the real-life interaction with parents may reduce if overly use Internet tools for interactions. This study contributes to the literature by investigating the adolescents’ relationships with friends, parents and teachers and indicates the potential program when adolescents using Facebook use for interaction. This study, thus, further recommends that parents should be concerned their children about Facebook use.

Consensual Relationships in the Academic Field: A Phenomenological Understanding  [PDF]
Aljoriz M. Dublin
Journal of Human Resource and Sustainability Studies (JHRSS) , 2015, DOI: 10.4236/jhrss.2015.31001
Abstract: The problem this study will address is the existence of consensual relationship between learners and their instructors. The purpose of this phenomenology is to understand lived experiences in relation to consensual relationship between ten teachers and ten students of XXX University. It uses phenomenological analysis to explore the lived experiences of informants. Qualitative data were collected through the use of interview protocols collected at a conducive place for informants of their selection. Some themes developed were fear, physical attraction, transference and countertransference. The study points to the natural existence of consensual relationship in the academe and learners.
Relationships between Cadmium in Tissues of Cacao Trees and Soils in Plantations of Trinidad and Tobago  [PDF]
Gideon Ramtahal, Ivan Chang Yen, Isaac Bekele, Frances Bekele, Lawrence Wilson, Kamaldeo Maharaj, Lisa Harrynanan
Food and Nutrition Sciences (FNS) , 2016, DOI: 10.4236/fns.2016.71005
Abstract: The primary source of cadmium in cocoa beans has been linked to its direct uptake by the cacao plant from cadmium contaminated soils. This research was conducted to evaluate and interpret significant relationships between cadmium levels in tissues of the cacao plant and soils from cocoa-growing areas in Trinidad and Tobago. Total (HNO3-extractable) concentrations of cadmium in both tissues and soils were determined. The levels of cadmium measured varied in the order: leaves > pods > shells > nibs > soil. Cadmium levels in all the cacao tissues analyzed were significantly (p < 0.05), positively and strongly correlated with each other. Additionally, significant (p < 0.05) positive relationships were also identified between Cd in cacao tissues and corresponding total HNO3-extractable Cd levels in soils. These findings suggest that they can possibly be used as predictive tools for assessing Cd levels in cacao.

Qin Guo-Fu,Zhao Jun,Tian Shu-Min,

菌物学报 , 1999,
Abstract: A pairing tests of Armillaria between three Chinese Biological Species (CBS) and six North American Biological Species (NABS) were conducted. Thirty-eight monospore isolates from Northeast China, which are representative of CBS A, CBS C and CBS D have been mared with tested strains of A sinapina, A calvescens, A gemina, A nabsnona, A ostoyae and NABS X respectively. As a results, CBS A from Changbai and greater Xing--an mountains was interfertile with A sinapina completely and identified as A sinapina .CBS C was intersterile with any tester of NABS, belonging to Asian-specific species. CBS D was interfertile with tWo isolates of A ostoyae, however, it appears to be incompatible with other four isolates because the mating ability of these four isolates have been degenerated. CBS D was identified as A ostoyae. The partial interfertility not, but the reduced growth interachon was observed in the pairing tests.
Divergencia fenotípica en los oasis de San Pedro de Atacama, norte de Chile
Héctor H Varela,José A Cocilovo
Estudios Atacame?os , 2011,
Abstract: Se analiza la diferenciación fenotípica entre ayllus de la población agroalfarera de San Pedro de Atacama. La muestra está constituida por 622 individuos correspondientes a los períodos Temprano, Medio y Tardío. Se trabajó con 37 variables craneométricas. Las diferencias se evaluaron mediante técnicas de análisis estadístico multivariado. Los resultados indican una importante diferenciación en el período Temprano. Durante el período Medio, se observa la reducción de las diferencias entre sitios y, en el período Tardío, un aumento moderado de las diferencias entre los ayllus. In this work we analyze the phenotypic differences among cemeteries from the prehistoric population of San Pedro de Atacama. The sample comprises 622 individuals, corresponding to Early, Middle, and Late periods. We worked with 37 craniometric variables. The differences among ayllus were evaluated using multivariate analysis. The results indicate a significant differentiation during the Early Period. The differentiation among ayllus during the Middle Period is reduced. During the Late Period, there is a moderate increase of differences among sites.
Gender Differences in Social Relationships, Social Integration and Substance Use  [PDF]
Gloria Jones-Johnson, Matt DeLisi, Andy Hochstetler, W. Roy Johnson, Natalia Frishman
Sociology Mind (SM) , 2013, DOI: 10.4236/sm.2013.31016

Although numerous studies have examined the relationship between family and religion on delinquency, there have not been studies of the relationship between parents, friends, and religion on substance use among adults. The analysis for this study was based on two waves of data (Wave 1, 1986 and Wave 2, 1989) of the Americans’ Changing Lives Survey. The results revealed that social relationships, social integration and attendance at religious services influence the number of drinks and cigarettes smoked per day among adults. Parental influence varies by gender. The implications for social control, social networks and gender perspectives are discussed.

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