3 research outputs found
THE APPLICATION OF CROSS–LAGGED PANEL ANALYSIS IN EDUCATIONAL RESEARCH
Cross–lagged panel analysis is found in the main stream of social, behavioral, medical, business and educational research. It is a form of quasi-experimental design used to determine whether the relationship between two variables is spurious i.e., due to a third variable and not due to causation. Cross–lagged panel analysis is a process used to determine which variable is the cause and which variable is the effect. It is an exploratory method of collecting information at two points in time i.e., time 1 and time 2, to clarify the causal relations between uncontrolled variables which could be tested more rigorously in an experimental setting. The Cross–lagged Panel Correlation (CLPC) is a low power test but better adapted than either multiple regression or factor analysis for answering many questions in longitudinal studies. It captures the dynamic relationship among the variables and allows the model to be controlled over time. This paper focuses on the 2w2v (two wave & two variable) design to describe a research method which can be used to explore the causal predominance relationship in the absence of a true experimental design, but only in a passive manner. Key words: cross–lagged panel correlation, spurious correlation, synchronous correlation, autocorrelation, stationarity, synchronicity.
Antioksidativni potencijal i sposobnost hvatanja slobodnih radikala metanolnog ekstrakta plodova Citrullus colocynthis (L.) Schrad.
Citrullus colocynthis (L.) Schrad. (Cucurbitaceae) is a medicinal plant traditionally used as an abortifacient and to treat constipation, oedema, bacterial infections, cancer and diabetes. Preliminary phytochemical screening of the plant showed the presence of large amounts of phenolics and flavonoids. Subsequent quantification showed the presence of 0.74% phenolics (calculated as gallic acid) and 0.13% flavonoids calculated as catechin equivalents per 100 g of fresh mass. The presence of phenolic compounds prompted us to evaluate its antioxidant activity. In the present study, methanolic fruit extract of C. colocynthis was screened to evaluate its free-radical scavenging ability. The highest antioxidant and free radical scavenging effect of the fruit extract was observed at a concentration of 2500 µg mL1.Citrullus colocynthis (L.) Schrad. (Cucurbitaceae) je ljekovita biljka koja se tradicionalno upotrebljava kao abortiv i za liječenje konstipacije, edema, bakterijskih infekcija, karcinoma i dijabetesa. Preliminarno fitokemijsko pretraživanje ukazalo je na prisutnost velikih količina fenola i flavonoida. Udio fenola bio je 0,74% (preračunato na galnu kiselinu), a flavonoida 0,13% preračunato na ekvivalente katehina na 100 g svježe mase. Zbog prisutnosti fenolnih spojeva ispitivano je antioksidativno djelovanje i sposobnost hvatanja slobodnih radikala metanolnog ekstrakta plodova. Koncentracija 2500 µg mL1 imala je najjači učinak
Emergence and re-emergence of glanders in India: a description of outbreaks from 2006 to 2011
Glanders, a bacterial disease of equines caused by Burkholderia mallei, is a fatal infectious disease of equines and has zoonotic significance. The disease has been eradicated from many countries by statutory testing, elimination of infected animals and import restrictions. However, it is still endemic in parts of Africa, Asia, the Middle East and Central and South America. In India, major glanders outbreaks were reported from different parts of the country between 1976 and 1982. Later, sporadic cases of the disease were reported in 1988, 1990 and 1998. The country remained free of glanders for about eight years until the recent outbreaks occurred in eight States from 2006 to 2007. Recurrent episodes have occurred in Himachal Pradesh and Uttar Pradesh, whereas fresh outbreaks occurred in Chhattisgarh from 2009 to 2010. A total of 164 equines were declared positive; a majority of the positive cases (n = 77) were from Uttar Pradesh, followed by Maharashtra (n = 23), Uttarakhand (n = 21) and Andhra Pradesh (n = 16). Under the provision of Prevention and Control of Infectious and Contagious Disease in Animals Act, 2009, all the infected animals were euthanised and bio-security measures were implemented to curb the further spread of the disease