This study uses a boundary design and propensity score methods to the effects of 1930s-era Home Owners Loan Corporation (HOLC) “redlining” maps on long-run trajectories urban neighborhoods. The led reduced home ownership rates, house values, rents increased racial segregation in later decades. A comparison either side city-level population cutoff that determined whether were drawn finds broadly...

In der Arbeit von Schrijver [3] wird die folgende Formulierung von Maders Satz aus [2] bewiesen (siehe Satz 1). Wir werden skizzieren wie man aus diesem Satz die Formulierung von Maders Satz über kreuzungsfreie H-Wege (siehe Korollar 2) herleiten kann. Eine Menge P von Wegen in einem Graphen G = (V,E) ist kreuzungsfrei, wenn die Schnittmenge der Eckenmengen zweier unterschiedlicher Wege aus P e...

In oligotrophic ocean regions such as the North Pacific Subtropical Gyre (NPSG), N2 fixation (i.e., diazotrophy) by a diverse consortium of microorganisms has been shown to contribute significantly to new production and particle export. In 2015 and 2016, we measured near-monthly abundances of the large cell-sized (> 10μm) diazotrophic genera Trichodesmium and diatom-associated Richelia and Calo...

The gene abundance and gene expression of six diazotroph populations from the Eastern Equatorial Atlantic in June 2007 were examined using nifH gene quantitative polymerase chain reaction (q PCR) methods. Of all the diazotrophs, Trichodesmium spp. was the most abundant with the highest number of gene copies in the Gulf of Guinea. Trichodesmium also had the highest nitrogenase gene transcript ab...

English Abstract This article is a summary of a case study of online faculty support that was carried out at the University of Pretoria (South Africa) in 2002. Organisational structures for academic faculty support that facilitates the development and implementation of online distance learning programmes are described. The study is based on interviews with decision makers, academic support staf...

The present-day study assesses diatom communities in river with relation to environmental conditions. Diatoms are susceptible to environmental conditions in river and their distribution is mainly governed by the physicochemical composition of the water. Diatoms and water samples were collected in 5 locations during summer season (May 2012). Analysed data were interpreted and the results are rep...

The sandy substrate of Lake Taharoa (west coast, North Island, New Zealand 35°50'S, 173°41'E) is covered by communities of filamentous algae that extend from the exposed beach down to 21 m depth. The algae bind the sand to form crusts and mats which may break off as discrete plates. The dominant species are the blue-greens Microcoleus, Nostoc, Phormidium, Lyngbya, Oscillatoria, Scytonema, Stigo...

Calothrix desertica having a semilunar apical heterocyst is proficient at excreting 1.2 g/L of extracellular polymers (EPsC) in 45 days. The refined EPsC constitutes 430 mg/g glycogen, 390 protein, and 14.6 glycoproteins (GPs). glycoprotein estimation was performed by two step hydrolysis methods with H2SO4. peak between 10 mAU to 20 HPLC, 1400 cm-1 1700 FTIR, 40kDa- 35kDa bands SDS-PAGE authent...