Search results for "SOI"

Effects of heat treatment on hydrogen production potential and microbial community of thermophilic compost enrichment cultures

2011

Cellulosic plant and waste materials are potential resources for fermentative hydrogen production. In this study, hydrogen producing, cellulolytic cultures were enriched from compost material at 52, 60 and 70°C. Highest cellulose degradation and highest H(2) yield were 57% and 1.4 mol-H(2) mol-hexose(-1) (2.4 mol-H(2) mol-hexose-degraded(-1)), respectively, obtained at 52°C with the heat-treated (80°C for 20 min) enrichment culture. Heat-treatments as well as the sequential enrichments decreased the diversity of microbial communities. The enrichments contained mainly bacteria from families Thermoanaerobacteriaceae and Clostridiaceae, from which a bacterium closely related to Thermoanaerobiu…

Response of soil bacterial community structure to successive perturbations of different types and intensities

2008

SummaryIn soil, genetic structure modifications of indigenousbacterial community consecutively to a severe stress(mercury contamination) were delayed when thecommunity was pre-exposed to various minor per-turbations (heat, copper and atrazine). Such minorperturbations induced transitory community struc-ture modifications leading to an increase of commu-nity stability towards a severe mercury stress. Theseresults illustrated well the short-term pre-adaptationprocess for bacterial community hypothesizing thatcommunity submitted to perturbations become moreresistant to withstand another stress. Compared with other environmental matrices of the bio-sphere, soils are considered as the main reservo…

Effect of primary mild stresses on resilience and resistance of the nitrate reducer community to a subsequent severe stress

2008

International audience; The factors regulating soil microbial stability (e.g. resistance and resilience) are poorly understood, even though microorganisms are essential for ecosystem functioning. In this study, we tested whether a functional microbial community subjected to different primary mild stresses was equally resistant or resilient to a subsequent severe stress. The nitrate reducers were selected as model community and analysed in terms of nitrate reduction rates and genetic structure by narG PCR-restriction fragment length polymorphism fingerprinting. Heat, copper and atrazine were used as primary stresses and mercury at a high concentration as a severe stress. None of the primary …

Syria from afar : how journalists in Finland and Germany cover the first YouTube war

2015

Miten uutisoida kaukaista sotaa, johon on vaikea ellei mahdoton päästä paikan päälle? Miten kertoa sodasta, jonka pääasialliset tietolähteet ovat sodan eri osapuolten media-aktivistit, hallitusta tukevat viestimet ja islamistitaistelijat, jotka kaikki rummuttavat omaa versiotaan tapahtumista? Ja ennen kaikkea: miten niiden esittämät väitteet, jotka usein vielä tulevat sosiaalisen median välityksellä, voi tarkistaa? Nämä ovat kysymyksiä, jotka ovat tämän tutkielman ytimessä ja myös sen lähtökohta. Syyrian sota on ulkomaantoimittajille valtava haaste. Olin itse 13 vuotta ulkomaantoimittajana Helsingin Sanomissa, ja painin usein sen kanssa, miten voin kertoa Syyrian tapahtumista mahdollisimman…

The Ambivalently Good Human Rights

2016

ChemInform Abstract: Synthesis of Isoindolo[1,4]benzoxazinone and Isoindolo[1,5]benzoxazepine: Two New Ring Systems of Pharmaceutical Interest.

2016

Abstract Two new ring systems, isoindolo[1,4]benzoxazinone and isoindolo[1,5]benzoxazepine, were conveniently synthesized through cyclization of suitably substituted isoindole derivatives. Some of the new compounds exhibited antiproliferative activity against a wide range of human tumor cell lines with GI 50 mean values at low micromolar level (3.72–5.13 μM).

Comments on “Predicting the Effect of Rock Fragments on Saturated Soil Hydraulic Conductivity”

2007

A simplified falling-head tecnique for rapid determination of field-saturated hydraulic conductivity

2004

Simplified measurements of the field-saturated hydraulic conductivity, K fs , require short duration experiments, small water volumes, and easily transportable equipment. A simplified falling-head (SFH) technique for the rapid determination of K fs has been developed and tested. The technique consists in applying a small volume of water on a soil surface, confined by a ring inserted a short distance into the soil, and then measuring the time from the application of water to the instant at which the surface area is no longer covered by water. A measurement of the initial and field-saturated soil water contents, and an estimate of the α* parameter of the Gardner's exponential model are then u…

Gold-Catalyzed Intramolecular Hydroamination of o-Alkynylbenzyl Carbamates: A Route to Chiral Fluorinated Isoindoline and Isoquinoline Derivatives

2013

Enantiomerically pure fluorinated isoindoline and dihydroisoquinoline scaffolds have been prepared through a diastereoselective addition of fluorinated nucleophiles to Ellman’s N-(tert-butanesulfinyl)imines followed by a sequence of Sonogashira cross-coupling/gold(I)-catalyzed cycloisomerization of the corresponding carbamate. A more favored 5-exo-dig mechanism was observed mainly due to an electronic effect of the fluorinated group.

Measured and Modeled Residue Dynamics of Famoxadone and Oxathiapiprolin in Tomato Fields

2018

A reliable analytical method for the simultaneous determination of famoxadone and oxathiapiprolin dissipation kinetics as well as the metabolites of oxathiapiprolin (IN-E8S72 and IN-WR791) in tomato and soil was developed. We studied the dissipation of famoxadone and oxathiapiprolin in tomatoes grown using different kinetic curves in the area of Beijing in 2015 and 2016. Our results show that the most suitable model for two fungicides in 2015 and 2016 was first-order kinetic and second-order kinetic with the half-lives of 3.4 to 5.2 and 2.4 to 3.0 days, respectively. In addition, we applied the dynamic plant uptake model dynamiCROP and combined it with results from the field experiments to …