Midday measurements of leaf water potential and stomatal conductance are highly correlated with daily water use of Thompson Seedless grapevines

A study was conducted to determine the relationship between midday measurements of vine water status and daily water use of grapevines measured with a weighing lysimeter. Water applications to the vines were terminated on August 24th for 9 days and again on September 14th for 22 days. Daily water use of the vines in the lysimeter (ETLYS) was approximately 40 L vine−1 (5.3 mm) prior to turning the pump off, and it decreased to 22.3 L vine−1 by September 2nd. Pre-dawn leaf water potential (ΨPD) and midday Ψl on August 24th were −0.075 and −0.76 MPa, respectively, with midday Ψl decreasing to −1.28 MPa on September 2nd. Leaf g s decreased from ~500 to ~200 mmol m−2 s−1 during the two dry-down periods. Midday measurements of g s and Ψl were significantly correlated with one another (r = 0.96) and both with ETLYS/ETo (r = ~0.9). The decreases in Ψl, g s, and ETLYS/ETo in this study were also a linear function of the decrease in volumetric soil water content. The results indicate that even modest water stress can greatly reduce grapevine water use and that short-term measures of vine water status taken at midday are a reflection of daily grapevine water use

"Contra el reino de la Bestia, nosotros, testigos, nos levantaremos" E. P. Thompson y la Campaña por el Desarme Nuclear

A fines de 1979 Edward Palmer Thompson abandonó su proyecto historiográfico para iniciar una campaña por el desarme nuclear y por la paz. Durante años el historiador marxista se abocó en exclusividad a las tareas de organizar el movimiento europeo por la paz y elaborar y difundir sus doctrinas. Este artículo presenta algunos elementos de su trayectoria intelectual que permiten comprender la articulación entre práctica política y práctica historiográfica. Al mismo tiempo, el concepto de "exterminismo" es recuperado como elemento organizador en su posicionamiento en el debate por el desarme nuclear

The American portrait tradition : Cephas Thompson 1775-1856

"The purpose of this study is to reveal the work of Cephas Thompson in the context of the American Portrait Tradition as it existed in America from 1775 to 1856. European historic and artistic background serves as the foundation. A critical analysis of the most relevant American portraitists from the seventeenth to the midnineteenth centuries is provided to relate them aesthetically and ideologically with the work of Cephas Thompson and to provide insight into the artistic trends prevalent in Europe and America"

New fossil polychaete from Essex, Illinois / Ida Thompson -- and Ralph G. Johnson --.

v.33:no.25(1977)

Letter from Thomas Thompson to Samuel Shapleigh, 10 October 1791

Letter arranges transfer of £50 from Thompson to Shapleigh through Capt. Luke Wilder.

Power of Attorney, Samuel Shapleigh for Thomas Thompson, May 18, 1791

Signed by Thomas Thompson and witnessed by Thaddeus Mason Harris and Otis(?) Clarke.