Die Mikroflora eines Langzeit-Sauerteiges

Zusammenfassung Die Milchsäurebakterien und Hefen eines kommerziellen Sauerteiges wurden isoliert und identifiziert. Dieser Sauerteig wird erhalten, wenn Roggenmehl und Wasser für mindestens 48 h gesäuert und wöchentlich in neues unsteriles Substrat überimpft wird. Alle gefundenen Milchsäurebakterien waren heterofermentativ, 2/3 von ihnen hatten ein enges Substratspektrum, bildeten Ammoniak aus Arginin, waren Acetat-auxotroph und produziertenl-Lactat und Ethanol. Eine kleinere Gruppe vergor mehr als 15 (von 49 getesteten) Zuckern, bildete kein Ammoniak aus Arginin und produziertedl-Lactat. Alle untersuchten Stämme enthielten in der Zellwand Lysin-d-Asparagin als Interpeptid-Brücke des Peptidoglykans. Alle Hefe-Isolate ergaben gleiche Resultate im Zucker-Assimilationstest und waren Cycloheximid-empfindlich. Der Hefestamm wurde alsSaccharomyces cerevisiae Hansen identifiziert.

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The microflora of a sourdough developed during extended souring phases

Summary The lactic acid bacteria and yeasts of a commercial sourdough were isolated and identified. This sourdough is obtained when rye flour and water are fermented for at least 48 h with weekly transfer to new unsterile substrate. All of the bacteria were heterofermentative, two-thirds of them had a narrow substrate spectrum, formed ammonia from arginine, were acetate-auxotrophic and producedl-lactate and ethanol. A minor group fermented more than 15 sugars (of 49 tested), were unable to form ammonia from arginine and produceddl-lactate. Of the strains tested all contained lysine-D-asparagine as an interpeptide bridge in the peptidoglycan of the cell wall. Each of the yeast isolates gave identical results in the sugar assimilation test and was cycloheximide sensitive. The yeast strain was identified asSaccharomyces cerevisiae Hansen.

     

Modeling and Rendering of the Atmosphere Using Mie-Scattering

This paper presents a method for rendering of the atmosphere by means of Mie-scattering. The method is based on a concentric atmospheric model, which is divided into four submodels: for clear air, aerosol, ozone, and rain. In order to simulate and visualize the various atmospheric effects, each of these submodels can be parameterized by the user as desired. The process of rendering an outdoor scene requires an enormous amount of computing power. In order to make this method suitable for efficient implementation, some simplifications and approximations are discussed. In addition, a selection of the rendering results are presented, and our further activities in the field of atmospheric rendering are discussed.     

Effect of the ac Field Level on the Aging of the Dielectric Response in Polycrystalline BaTiO3

BaTiO₃ ceramics with grain sizes from 0.6 to 60 μm and relative densities of 89% to 92% were prepared by hot forging and conventional sintering from very pure-oxalate-derived powder. The aging of both the dielectric constant and the dielectric loss was examined at weak and strong fields with respect to grain size and frequency. It was concluded that the main aging mechanism is the aging of hysteretic domain wall motion for coarse-grained ceramics. At grain size of less than 1 μm, the lack of frequency and E _AC dependence, along with a lower aging rate, suggests that domain motions or hysteretic domain wall motions are restricted in finegrained ceramic BaTiO₃ and contribute little to the aging.     

Professor Dr. Martin Gersonde 65 Jahre

Ohne Zusammenfassung     

Solution structure of an rRNA methyltransferase (ErmAM) that confers macrolide-lincosamide-streptogramin antibiotic resistance

Bone growth and remodeling are inhibited by severe burns in adult and pediatric patients, resulting in alterations in linear growth, bone mass, osteoporosis, and increased risk for pathologic fractures. This study of a mouse model of burn injury showed skeletal changes similar to those reported in patients with burn injuries. Baseline, control, sham, and burned mice were injected with fluorescent markers calcein and tetracycline for histomorphometric analysis. Total femur dry and ash weights and total calcium content were significantly lower 10 days after burn injury compared with sham and control animals. There also were decreases in the percentage of fluorochrome-labeled bone surfaces and bone formation rates in the burn-injured mice compared with control and sham mice; however, there were no differences in the mineral apposition rates. This model now provides an opportunity to examine cellular and molecular mechanisms contributing to skeletal pathology in a well-defined burn injury model.     

An audit-evaluation of a school psychological services unit utilizing professional standards: An example.

Details the planning and implementation stages of an internally generated audit-evaluation review of a school psychological services unit. The review was conducted by a team of professional peers and consumers, and utilized professional standards and guidelines for services delivered. The review is seen as having general application to the evaluation expectations facing these units. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Implementation status of the APA guidelines for delivery of services by school psychologists.

Since the professional expertise and effort that went into the Specialty Guidelines for the Delivery of Services, little has been done to systematically assess commitment to or implementation of the Guidelines. To provide this information for school psychology, we designed two national surveys of directors of school psychology services in public school systems and school psychology consultants in state departments of education. Among the respondents, there was generally strong support for the majority of the guidelines. However, there was some concern about those guidelines that recommend that the professional school psychologist provide supervision and direction to all school psychology service units and be responsible ultimately for all services. Obstacles to guideline implementation are catalogued, and recommendations for the revision of the Guidelines are made. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Tardive dyskinesia in a developmentally disabled population: Manifestation during the initial stage of a minimal effective dose program.

Forty individuals who were withdrawn from neuroleptic medication after the initiation of a minimal effective dose program at a residential facility for individuals with developmental disabilities were evaluated. Tardive dyskinesia (TD) was assessed using the Dyskinesia Identification System Condensed User Scale (DISCUS). Half of the participants being treated with neuroleptic medication (N) were also being treated with anticonvulsant medication (AC), so 2 withdrawal groups were formed. The N only group manifested an increase in DISCUS scores after the withdrawal of neuroleptic medication, but the N?+?AC group did not. On the basis of this intriguing new finding, it was speculated that treatment with anticonvulsant medication might prevent the development or suppress the expression of TD. (PsycINFO Database Record (c) 2010 APA, all rights reserved)