Impact of soil pedogenesis on the diversity and composition of fungal communities across the California soil chronosequence of Mendocino.

Understanding how soil pedogenesis affects microbial communities and their in situ activities according to ecosystem functioning is a central issue in soil microbial ecology, as soils represent essential nutrient reservoirs and habitats for the biosphere. To address this question, soil chronosequences developed from a single, shared mineralogical parent material and having the same climate conditions are particularly useful, as they isolate the factor of time from other factors controlling the character of soils. In our study, we considered a natural succession of uplifted marine terraces in Mendocino, CA, ranging from highly fertile in the younger terrace (about 100,000 years old) to infertile in the older terraces (about 300,000 years old).

Inhibition of , Causative Agent of Angular Leaf Spot of Strawberry, through Iron Deprivation.

In commercial production settings, few options exist to prevent or treat angular leaf spot (ALS) of strawberry, a disease of economic importance and caused by the bacterial pathogen . In the process of isolating and identifying bacteria from symptomatic plants, we observed growth inhibition of by bacterial isolates from the same leaf macerates. Identified as species of and , these isolates were confirmed to suppress growth of in agar overlay plates and in microtiter plate cultures, as did our reference strain KT2440.

Leaf microbiota in an agroecosystem: spatiotemporal variation in bacterial community composition on field-grown lettuce.

The presence, size and importance of bacterial communities on plant leaf surfaces are widely appreciated. However, information is scarce regarding their composition and how it changes along geographical and seasonal scales. We collected 106 samples of field-grown Romaine lettuce from commercial production regions in California and Arizona during the 2009-2010 crop cycle.

A PCR-based toolbox for the culture-independent quantification of total bacterial abundances in plant environments.

A major obstacle in the culture-independent estimation of the abundance of bacteria associated with plants is contamination with plant organelles, which precludes the use of universal rRNA bacterial primers in quantitative PCR applications. We present here a PCR-based method that allows a priori determination of the degree of chloroplast and mitochondrial contamination in DNA samples from plant environments. It is based on differential digestibility of chloroplast, mitochondrial and bacterial small subunit rRNA gene amplicons with the restriction enzymes AfeI and BbvCI.

Parameters and methods for testing artificial heart valves.

The report describes the development of heart valve test standards. The aim is comprehensive quality assurance by in vitro tests. The project includes three test fields: general basis, development and definition of test methods and test devices and comparative in vitro assessment of valves for the definition of minimum requirements.

Antibody formation and insulin requirements in diabetic children during treatment with purified commercial pork insulins.

40 diabetic children (20 female, 20 male, mean age 8.5 ys, ranging from 0.8 to 14.

The First Spectrum of Ytterbium (Yb i).

Wavelengths and estimated intensities for 1791 lines of neutral ytterbium in the region 2155 to 31 308 Å are reported. The Zeeman effect has been investigated for 249 of these lines. Analysis of the data has resulted in classification of 787 lines as transitions between 102 even and 77 odd levels.

Revised Lifetimes of Energy Levels in Neutral Iron.

Mean radiative lifetimes for 408 energy levels of neutral iron are revised from our 1967 paper on the basis of comparison with 81 subsequently measured lifetimes. The standard deviation of the ratio of the revised values to the reference lifetimes is 30 percent.

Energy Levels and Classified Lines in the First Spectrum of Technetium (Tc i).

Progress in the classification of Tc i lines is reported. About 2200 of the known Tc i lines between 2154 and 8918 Å are now classified as transitions between 108 even and 147 odd energy levels. Tables of levels and classified lines are given.

Lifetimes of Energy Levels in Neutral Iron.

Mean radiative lifetimes for 408 energy levels of neutral iron are calculated from the known transition probabilities of 3288 lines of Fe i.

Matrices of Spin-Orbit Interaction in the Electron Configurations and .

The matrices of spin-orbit interaction in the and electron configurations have been calculated in the LS representation. The matrices have been checked by showing that their eigenvalues, calculated by use of an IBM 7090, agree with the correct eigenvalues known from the theory of -coupling. For the sake of completeness, the energies of electrostatic interaction for these configurations are also given.

Matrices of Spin-Orbit Interaction in the Electron Configurations ' and ' .

The matrices of spin-orbit interaction in the and electron configurations have been calculated. The matrices have been checked by showing that their eigenvalues, calculated by use of an IBM 7090, agree with the correct eigenvalues known from the theory of -coupling. For the sake of completeness, the matrices of electrostatic interaction for these configurations are also given.

Analysis of the Spectrum of Neutral Atomic Bromine (Br I).

The spectrum of the neutral bromine atom, Br I, has been newly investigated by using electrodeless discharge tubes as light sources. The observations have led to a list of wavelengths and estimated intensities for 1253 spectral lines in the range 1067 to 24100 Å. The number of known energy levels has been increased to 123 even and 128 odd levels, as compared with the 27 even and 33 odd levels previously known.

Wavelengths and Intensities in the First Spectrum of Bromine, 2000 to 13000 A.

The first spectrum of bromine, Br I, has been newly investigated using electrodeless discharge tubes as light sources. The observations have led to a list of wavelengths and estimated intensities of 1056 lines emitted by neutral atoms in the region from 12965 A in the infrared to 3325 A in the ultraviolet. Most of the wavelengths are given to 0.