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236 results on '"Pihlaja K"'

13. Relations of laterality and chewing sidedness in twins

Author

Pihlaja, K. (Kirsi), Vuollo, V. (Ville), Sidlauskas, M. (Mantas), Harila, V. (Virpi), Sidlauskas, A. (Antanas), Salomskiene, L. (Loreta), and Heikkinen, T. (Tuomo)

Subjects
handedness, stomatognathic diseases, stomatognathic system, digestive, oral, and skin physiology, twins, chewing, birth order, ocular dominance
Abstract

Objectives: To study, whether there are associations between chewing side preference and other lateralities, whether there is a genetic origin for preferred chewing side (PCS), relations to sex, birth order and orthodontic treatment. Materials and Methods: The study included 113 twin pairs, 57 pairs monozygotic, 47 pairs same sex dizygotic and 9 pairs of opposite sex. The lateralities of preferred chewing side, footedness and eyedness were assessed by functional tests and handedness was checked by asking. Results: Right-handed, -footed and -eyed as separated groups, and true-right sided (combined), were evenly distributed by preferred chewing side. By contrast, left-handed, -footed, -eyed and non-right sided used more left or both sides when chewing. Birth order affected preferred chewing side among monozygotic: the first-born twin was more likely to have the preferred chewing side on the non-right, whereas second-born twins used right side. Gender, zygosity and orthodontic treatment were not statistically significant factors. Limitations: Examination of chewing sidedness could have been done in several different ways to provide a definite result. Sample size of opposite sex twins was very small. Conclusions: Preferred chewing side generally seemed to follow the side where other lateralities occur; however, monozygotic twins seemed to be more receptive to it. True-right sided were more evenly distributed than non-right sided by the preferred chewing side.

Published
2019

15. New national and regional biological records for Finland 9:contributions to Bryophyta and Marchantiophyta 8

Author

Juutinen, R., Ulvinen, T., Kypärä, T., Huttunen, S., Vuorinen, K., Kuitunen, T., Parnela, A., Korvenpää, T., Syrjänen, K., Pihlaja, K., Köckinger, H., Nadezhda Konstantinova, Kestilä, A., Ervasti, E., He, X., Häyhä, T., Karttunen, K., Laaka-Lindberg, S., Torniainen, J., Vainio, O., Vasander, H., and Vuorinen, E.

Subjects
lajistokartoitus, sammalet, Suomi, maksasammalet, Artikkelit, lehtisammalet, Finland
Abstract

Five species of mosses (Bryophyta: Oncophorus demetrii, Oncophorus integerrimus, Oxyrrhynchium speciosum, Sphagnum divinum and Sphagnum medium) and one of liverworts (Marchantiophyta: Kurzia trichoclados) are presented as new for Finland. Seligeria calcarea and Seligeria pusilla, previously thought to be regionally extinct from Finland, are reported to being found again. New records in biogeographical provinces for 74 species of mosses and 36 species of liverworts are listed. Finally, 17 occurrences in provinces are removed due to misidentifications or missing specimens. nonPeerReviewed

Published
2018

21. Comparison of the electronic structures of imine and hydrazone side-chain functionalities with the aid of (super)13 C and (super)15 N NMR chemical shifts and PM3 calculations. The influence of C=N-substitution on the sensitivity to aromatic substitution

Author

Neuvonen, K., Fulop, F., Neuvonen, H., Koch, A., Kleinpeter, E., and Pihlaja, K.

Subjects
Schiff bases, Hydrazine, Chemical reactions -- Analysis, Nuclear magnetic resonance spectroscopy -- Usage, Aromatic compounds, Substitution reactions -- Analysis, Biological sciences, Chemistry
Abstract

Research has been conducted on C=N carbon resonances on hydrazones and imines. The characterization of the origin of the differences in substituent dependence of these resonances has been carried out, and the results are reported.

Published
2003

23. The Pseudo-Michael Reaction of 2-Hydrazinylidene-1-Arylimidazolidines with Diethyl Ethoxymethylenemalonate.

Author

Aletańska ‐ Kozak, M., Kaczor, A. A., Wróbel, T. M., Kozioł, A. E., Suwińska, K., Dybała, I., Pihlaja, K., and Matosiuk, D.

Subjects
MICHAEL reaction, CHEMICAL reactions, IMIDAZOLES, PYRIMIDINE derivatives, THERMODYNAMIC control, ISOMERS
Abstract

The pseudo-Michael reaction of 2-hydrazinylidene-1-arylimidazolidines with diethyl ethoxymethylenemalonate (DEEM) was investigated. The reaction yields the chain adduct, namely diethyl{[2-(1-arylimidazolidin-2-ylidene)hydrazinyl]methylidene}propanedioates. This is contrary to the pseudo-Michael reaction of DEEM with 1-aryl-4,5-dihydro-1 H-imidazol-2-amines that does not allow isolation of chain derivatives and leads to cyclic imidazo[1,2- a]pyrimidine derivatives while even at thermodynamic control. At first of diethyl{[2-(1-arylimidazolidin-2-ylidene)hydrazinyl]methylidene}propanedioates leads to ethyl 1-aryl-5(1 H,8 H)oxo-2,3-dihydro-imidazo[2,1- c][1,2,4]triazepine-6-carboxylates. 1,5-Sigmatropic shift, following the , caused of 5(1 H,8 H)oxo-2,3-dihydro-imidazo[2,1- c][1,2,4]triazepine-6-carboxylates to ethyl 1-aryl-5(1 H)hydroxy-2,3-dihydroimidazo[2,1- c][1,2,4]triazepine-6-carboxylates. Presence of both isomers in the reaction product was detected in the NMR spectra. The structure of all the compounds was confirmed with spectroscopic studies (1H NMR and MS). The structure of diethyl{[2-(1-phenylimidazolidin-2-ylidene)hydrazinyl]methylidene}propanedioate was also confirmed by X-ray crystallography. In the , thermodynamics and HOMO-LUMO orbitals of the reactants were studied by using quantum chemical calculations. [ABSTRACT FROM AUTHOR]

Published
2016
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