Role of social organizers in assisting farmer-managed irrigation systems: Proceedings of a regional workshop of the Farmer-Managed Irrigation Systems Network held at Khon Kaen, Thailand from 15-20 May 1989

Farmer managed irrigation systemsRural sociologySocial participationOrganizations

A Proposed Hospitality Curriculum for Two-Year Colleges in Florida

The expansion of the hotel industry and its related areas necessitates new educational training for those who will occupy positions of responsibility. Two-year colleges provide one possibility for this training. The authors propose a common foundation for all such programs in Florida

Electron Diffraction Study of the Structure of Trimethylphosphine

The structural parameters of gaseous trimethylphosphine, including standard errors, were found to be as follows: center of gravity bond distances were rCP=1.8465±0.003 A, and rCH=1.091±0.006 A; angles were <C☒P☒C=98.6±0.3°, and <P☒C☒H=110.7±0.5°; root‐mean‐square amplitudes of vibration were lCP=0.054±0.003 A, lCH=0.073±0.006 A, lP— —H=0.110±0.006 A, and lC— —C=0.084±0.005 A. The methyl groups were observed to be in staggered configurations analogous to those in ethane, with rotational barriers probably 1.5 kcal/mole or higher. A brief structural comparison with halogen derivatives and hydrides is presented.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/70229/2/JCPSA6-32-2-512-1.pd

Structures of CF3Cl and CH3Cl

The molecular structures of CF3Cl and CH3Cl were determined by refined procedures of electron diffraction. For CF3Cl, the most probable C☒F and C☒Cl distances are 1.328 A and 1.751 A respectively and ∠FCF=108.6°. Results for CH3Cl agree with the complete microwave determination. Vibrational amplitudes are in agreement with approximate calculations by Morino.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/70122/2/JCPSA6-23-10-1860-1.pd

Refined Procedure for Analysis of Electron Diffraction Data and Its Application to CCl4

A refined procedure for obtaining the structure of free molecules from electron diffraction data is described which compensates for the interference arising from non‐nuclear scattering. The procedure is applied to CCl4 using somewhat more extensive rotating sector data than has hitherto been published for this molecule. Estimates are made for the first time in electron diffraction results of the effect of anharmonicity of vibration on the measurement of internuclear distance and of the effect of the failure of the Born approximation on the measurement of amplitudes of vibration. A method of estimating the reliability of the results is described.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/71343/2/JCPSA6-23-10-1854-1.pd