Letter from Margaret Mann to Mark Rich

This letter from Margaret Mann, secretary and instructor in stenography and typewriting at McMinnville College (later Linfield College), provides a response to a letter Mark Rich wrote before beginning his first year at the college. The letter answers questions regarding class requirements and his scholarship, and it explains the beginning of the fall semester was pushed back to October 1 because of a scarcity of labor.https://digitalcommons.linfield.edu/lca_rich/1001/thumbnail.jp

Cultivation and analysis of anthocyanin containing types of potatoes in organic farming regarding cultivability and additional health benefits

In a two year research project a representative spectrum of blue potato varieties were cultivated and tested in detail regarding disease infestation, yield potential and the influence of production systems (organic). Cultivation recommendations for blue potatoes could be deduced from this. Furthermore the varying anthocyanin content as well as the antioxidant capacity of the varieties used was analysed. Varieties with a particularly high content will undergo further tests to show the influence of the manner of preparation (boiling, steaming, frying) and determine their use for the processing industry. The combination of ecologically produced potatoes with „additional health benefits“ arouses the customers interest. The cultivation of high yield blue types can be an alternative to the cultivation of yellow fleshed high yield varieties in organic operating companies

Diversity and community biomass depend on dispersal and disturbance in microalgal communities

The evidence for species diversity effects on ecosystem functions is mainly based on studies not explicitly addressing local or regional processes regulating coexistence or the importance of community structure in terms of species evenness. In experimental communities of marine benthic microalgae, we altered the successional stages and thus the strength of local species interactions by manipulating rates of dispersal and disturbance. The treatments altered realized species richness, evenness and community biomass. For species richness, dispersal mattered only at high disturbance rates; when opening new space, dispersal led to maximized richness at intermediate dispersal rates. Evenness, in contrast, decreased with dispersal at low or no disturbance, i.e. at late successional stages. Community biomass showed a nonlinear hump-shaped response to increasing dispersal at all disturbance levels.We found a positive correlation between richness and biomass at early succession, and a strong negative correlation between evenness and biomass at late succession. In early succession both community biomass and richness depend directly on dispersal from the regional pool, whereas the late successional pattern shows that if interactions allow the most productive species to become dominant, diverting resources from this species (i.e. higher evenness) reduces production. Our study emphasizes the difference in biodiversity–function relationships over time, as different mechanisms contribute to the regulation of richness and evenness in early and late successional stages

4,6-Bis(diphenyl­phosphan­yl)-2,8-di­methyl­phenoxathiin dichloro­methane monosolvate

The title compound, C38H30OP2S·CH2Cl2, belongs to the xanthene family of ligands containing S- and O-donor atoms in the central heterocylic ring. Positions 2 and 8 on the xanthene backbone are functionalized with methyl groups to allow for the selective functionalization of the backbone at positions 4 and 6 with diphenyl­phosphanyl units. The title compound shows a significant ‘roof-like’ bending along the axis of planarity involving the O- and S-donor atoms and the benzene rings, resulting in a dihedral angle between the mean planes of the benzene rings of 32.88 (13)°

Atlas ontwikkeling landbouw; onderzoek in opdracht van Minsterie van VROM/Rijksplanologische Dienst.

Dit onderzoek dient als bouwsteen voor een te ontwikkelen Strategische Visie Landelijk Gebied en de Vijfde Nota Ruimtelijke Ordening. Het is uitgevoerd in opdracht van VROM/RPD. De volgende onderwerpen staan centraal: de toestand van de landbouw in 1998; perspectieven voor verbreding; perspectieven voor wereldmarktlandbouw. De eerste vraag is beantwoord met behulp van gegevens uit de CBS-Landbouwtelling en andere bronnen. Om de perspectieven voor de wereldmarktlandbouw te bepalen is gebruikgemaakt van het DRAM-model. De perspectieven voor verbreding zijn via een logitmodel benaderd. Uit het onderzoek komt naar voren dat er al behoorlijk wat gebieden zijn met veel verbreding, maar dat, gegeven de huidige omstandigheden, nog slechts in een paar van die gebieden meer verbreding mogelijk is. Deze gebieden liggen vooral in het zuiden en zuidwesten van het land en zuidelijk rond het IJsselmeer. Voor de wereldmarktlandbouw zijn de omstandigheden het gunstigst in het noorden en het westen van het land

Spotting the diffusion of New Psychoactive Substances over the Internet

Online availability and diffusion of New Psychoactive Substances (NPS) represent an emerging threat to healthcare systems. In this work, we analyse drugs forums, online shops, and Twitter. By mining the data from these sources, it is possible to understand the dynamics of drugs diffusion and their endorsement, as well as timely detecting new substances. We propose a set of visual analytics tools to support analysts in tackling NPS spreading and provide a better insight about drugs market and analysis

4,6-Bis(diphenyl­phosphan­yl)dibenzo[b,d]furan

The asymmetric unit of the title compound, C36H26OP2, comprises two mol­ecules which have slightly different conformations of the phenyl ring substituents. In both mol­ecules, the dibenzofuran unit is close to being planar, with dihedral angles of 3.20 (3) and 1.86 (2)° for the two mol­ecules. Its planarity affects the intra­molecular distances between P atoms, with P⋯P distances of 5.574 (2) and 5.485 (2) Å for the two mol­ecules

Grazer diversity effects in an eelgrass–epiphyte–microphytobenthos system

The dramatic loss of biodiversity and its consequences for ecosystem processes have been of considerable interest in recent ecological studies. However, the complex and interacting processes influencing diversity effects in multitrophic systems are still poorly understood. We used an experimental eelgrass system to study the effects of changing richness of three consumer species on the biomass, diversity and taxonomic composition of both epiphytic and benthic microalgal assemblages. After 1 week, consumer richness enhanced the grazing impact on epiphyte biomass relative to single consumer treatments and a positive effect of consumer richness on prey diversity was found. Moreover, strong effects of consumer species identity on taxonomic composition were found in both microalgal assemblages. However, the effects of consumer richness were not consistent over time. The consequences of high nutrient availability seemed to have masked consumer richness effects