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The number of tree species on Earth.
Proc Natl Acad Sci U S A. 2022 Feb 8;119(6):e2115329119. doi: 10.1073/pnas.2115329119.
Proc Natl Acad Sci U S A. 2022.
PMID: 35101981
Free PMC article.
Maize diversity and ethnolinguistic diversity in Chiapas, Mexico.
Perales HR, Benz BF, Brush SB.
Perales HR, et al.
Proc Natl Acad Sci U S A. 2005 Jan 18;102(3):949-54. doi: 10.1073/pnas.0408701102. Epub 2005 Jan 7.
Proc Natl Acad Sci U S A. 2005.
PMID: 15640353
Free PMC article.
This paper reports on research in the Maya highlands (altitude >1,800 m) of central Chiapas in southern Mexico that examined the distribution of maize (Zea mays) types among communities of two groups, the Tzeltal and Tzotzil. ...
This paper reports on research in the Maya highlands (altitude >1,800 m) of central Chiapas in southern Mexico that examined the d …
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Improving the direct-methods sign-unconstrained S-FFT algorithm. XV.
Rius J, Frontera C.
Rius J, et al.
Acta Crystallogr A. 2009 Nov;65(Pt 6):528-31. doi: 10.1107/S0108767309038136. Epub 2009 Oct 17.
Acta Crystallogr A. 2009.
PMID: 19844035
In order to extend the application field of the direct-methods S-FFT phase-refinement algorithm to density functions with positive and negative peaks, the equal-sign constraint was removed from its definition by combining rho(2) with an appropriate density function mask [Rius &am …
In order to extend the application field of the direct-methods S-FFT phase-refinement algorithm to density functions with positive and negat …
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