Status quo and future research challenges on organic food quality determination with focus on laboratory methods.

Organic food quality determination needs multi-dimensional evaluation tools. The main focus is on the authentication as an analytical verification of the certification process. New fingerprinting approaches such as ultra-performance liquid chromatography-mass spectrometry, gas chromatography-mass spectrometry, direct analysis in real time-high-resolution mass spectrometry as well as crystallization with and without the presence of additives seem to be promising methods in terms of time of analysis and detecting organic system-related parameters. For further methodological development, a system approach is recommended, which also takes into account food structure aspects. Furthermore, the authentication of processed organic samples needs more consciousness, hence most of organic food is complex and processed.

Lactobacillus secaliphilus sp. nov., isolated from type II sourdough fermentation.

Two strains of Gram-positive, catalase-negative, lactic acid bacteria, strains TMW 1.1309(T) and TMW 1.1313, were isolated at an interval of several years from an industrial type II sourdough. They occurred at cell numbers of 8x10(8) c.f.u. g(-1) and therefore were considered to be one of the dominant members of the microbiota in this type of fermentation. Cells of both strains grow exclusively on modified MRS containing trypsin-digested rye-bran extract. Both strains possessed identical 16S rRNA gene sequences, but could be discriminated by RAPD fingerprints. Comparative 16S rRNA and tuf gene sequence analyses positioned strain TMW 1.1309(T) as part of the Lactobacillus reuteri phylogenetic group within the genus Lactobacillus. The 16S rRNA gene sequence similarities to the closest related species, Lactobacillus coleohominis and Lactobacillus ingluviei were 97.1 and 95.4 %, respectively. The DNA G+C content of strain TMW 1.1309(T) was 48 mol%. Growth characteristics, biochemical features and DNA-DNA hybridization values below 70 % with all the nearest neighbours demonstrated that the isolates represent a novel Lactobacillus species. The name Lactobacillus secaliphilus sp. nov. is proposed for the novel isolates, with the type strain TMW 1.1309(T) (=DSM 17896(T)=CCUG 53218(T)).

Effects of ultrahigh dilutions of 3,5-dichlorophenol on the luminescence of the bacterium Vibrio fischeri.

There is a great need for research in the field of homeopathy for laboratory test systems to investigate the actions of ultrahighly diluted biological effectors. With this in mind, we used the luminescent bacterium Vibrio fischeri, which is used throughout the world in testing water quality. Luminescence inhibition is utilized as a test parameter for the toxicity of a sample. We used ultrahigh dilutions (UHD) of 3,5-dichlorophenol as effector and adapted the standard test procedure for water toxicity in a way that let us evaluate very minute effects. Three groups of samples were prepared and then blinded: 45 dilutions of 3,5-dichlorophenol in steps of 10, starting with 4.2 x 10(-2) M, with vigorous shaking between dilution steps; 45 identical dilutions of 3,5-dichlorophenol without vigorous shaking; and 49 control samples of the diluent. The results of, and the discussion based on, a thorough statistical analysis led to the conclusion that an effect based on UHD, which results in an inhibition of luminescence of less than 1.5%, can be confirmed for some of the potency samples. There were both effective and ineffective samples in the three sample groups. The size of the effect was very small (ca. 1.5%), though statistically significant. The number of effective samples was significantly higher among the vigorously shaken samples than among the controls and the unshaken samples (14, 6 and 7 effective samples, respectively).

Making sense of repetition phenomena by integrating psychotraumatology and psychodynamic psychotherapy.

Psychotherapy and psychotraumatology share a preoccupation with repetition phenomena, manifested as transference, compulsions to repeat, or intrusive reexperiencing. Terminological diversity obscures compelling similarities between these repetition phenomena and discourages speculation about processes involved in their genesis. This paper remedies these oversights by integrating recent empirical evidence pertaining to memory with European intellectual traditions embraced by its pioneering dynamic psychotherapists. Using dreams as a prototype repetition, the phenomenological diversity of repetition phenomena is shown to be reconcilable with current evidence about memory encoding, storage, and retrieval. Differences in persistence, intensity, pervasiveness, and treatment resilience of repetition phenomena are explained using concepts derived from psychological and biological sciences. Implications for psychotherapeutic theory, practice, and evaluation are considered.