نتایج جستجو برای: quantitative

تعداد نتایج: 315361  

Journal: :تحقیقات علوم رفتاری 0
احمدرضا کیانی مریم فاتحی زاده نظام الدین قاسمی ahmadreza kiani maryam fatehizadeh nezamaddin ghasemi

aim and background: the purpose of this research was a quantitative study of family factors that interfere with suicide attempters. methods and materials: the research is descriptive. we used phenomenological and qualitative way. 20 suicide attempter's participants were selected by purpose-based way, and sampling continued to saturating. for data gathering, we used interview that accomplished b...

Journal: :تحقیقات مهندسی کشاورزی 0
نسیبه ایزدی خواه دانشجوی کارشناسی ارشد حسین مبلی استاد دانشکده مهندسی و فناوری کشاورزی دانشگاه تهران عباس اکبرنیا عضو هیئت علمی سازمان پژوهشهای علمی و صنعتی ایران حجت احمدی استادیار دانشکده مهندسی و فناوری کشاورزی دانشگاه تهران شاهین رفیعی دانشیار دانشکده مهندسی و فناوری کشاورزی دانشگاه تهران

olive oil extraction methods and technology can affect the quality and quantity of the extracted oil. in this study, qualitative and quantitative parameters were investigated for oil extracted using a hammer crusher at 720 and 1450 rpm at 30°, 40°, 60° c mixing temperatures. the data were analyzed using a complete randomized block factorial design using spss software with three replications. th...

2015
Xinwang Zhao

The first and last names for the second and the fifth authors were inadvertently switched. The first name appears as the last name and the last name appears as the first name. Zhao Xinwang should be Xinwang Zhao and Tu Jinxing should be Jinxing Tu. The correct citation is: Bu SH, Zhao X, Yi C, Wen J, Tu J, Zhang YM (2015) Interacted QTL Mapping in Partial NCII Design Provides Evidences for Bree...

Journal: :Proceedings. Biological sciences 2007
Michael Doebeli Hendrik J Blok Olof Leimar Ulf Dieckmann

During bouts of evolutionary diversification, such as adaptive radiations, the emerging species cluster around different locations in phenotype space. How such multimodal patterns in phenotype space can emerge from a single ancestral species is a fundamental question in biology. Frequency-dependent competition is one potential mechanism for such pattern formation, as has previously been shown i...

2014
Il-Youp Kwak Candace R. Moore Edgar P. Spalding Karl W. Broman

Most statistical methods for quantitative trait loci (QTL) mapping focus on a single phenotype. However, multiple phenotypes are commonly measured, and recent technological advances have greatly simplified the automated acquisition of numerous phenotypes, including function-valued phenotypes, such as growth measured over time. While methods exist for QTL mapping with function-valued phenotypes,...

Journal: :Behavior genetics 1999
C V Dolan D I Boomsma M C Neale

The contribution of size 3 and size 4 sibships to power in covariance structure modeling of a codominant QTL is investigated. Power calculations are based on the noncentral chi-square distribution. Sixteen sets of parameter values are considered. Results indicate that size 3 and size 4 sibships provided large increases in power over size 2 sibships. On average a size 3 (4) sibship is 3 (6 to 7)...

Journal: :Current Biology 2013
John F.Y. Brookfield

Quantitative trait loci (QTLs) underlying multifactorial disorders explain little of the heritability - most is 'missing'. A new yeast study has identified QTLs which explain most heritability in traits. Why is heritability missing in human diseases but not here?

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