Search results for "autot"

Density-dependent regulation of natural and laboratory rotifer populations

2001

Density-dependent regulation of abundance is fundamentally important in the dynamics of most animal populations. Density effects, however, have rarely been quantified in natural populations, so population models typically have a large uncertainty in their predictions. We used models generated from time series analysis to explore the form and strength of density-dependence in several natural rotifer populations. Population growth rate (r) decreased linearly or non-linearly with increased population density, depending on the rotifer species. Density effects in natural populations reduced r to 0 at densities of 1–101−1 for 8 of the 9 rotifer species investigated. The sensitivities of these spe…

La reforma de la legítima defensa en Italia: El derecho a la autotutela del domicilio familiar

2012

A DC current transformer for large bandwidth and high common-mode rejection

1999

A review of known magnetic-coupled current-sensing techniques is presented, Subsequently, a novel technique is introduced, based on a configuration discussed in a previous paper. The previous technique made use of a galvanomagnetic device (Hall effect sensor) to sense the magnetization of a current transformer core, so that the sum of the Hall voltage and the voltage across the secondary shunt resistor would yield a faithful copy of the input current. The technique described in this paper makes use of the same principle to obtain a high bandwidth (from DC to 1 MHz) and very high common-mode rejection current transformer, without the need for a Hall effect probe. This is achieved by subtract…

Calibration of denitrifying activity of polyphosphate accumulating organisms in an extended ASM2d model

2010

Abstract This paper presents the results of an experimental study for the modelling and calibration of denitrifying activity of polyphosphate accumulating organisms (PAOs) in full-scale WWTPs that incorporate simultaneous nitrogen and phosphorus removal. The convenience of using different yields under aerobic and anoxic conditions for modelling biological phosphorus removal processes with the ASM2d has been demonstrated. Thus, parameter ηPAO in the model is given a physical meaning and represents the fraction of PAOs that are able to follow the DPAO metabolism. Using stoichiometric relationships, which are based on assumed biochemical pathways, the anoxic yields considered in the extended A…

Mixotrophy in Pyroleae (Ericaceae) from Estonian boreal forests does not vary with light or tissue age

2017

SPE IPM UB; International audience; In temperate forests, some green plants, namely pyroloids (Pyroleae, Ericaceae) and some orchids, independently evolved a mode of nutrition mixing photosynthates and carbon gained from their mycorrhizal fungi (mixotrophy). Fungal carbon is more enriched in 13C than photosynthates, allowing estimation of the proportion of carbon acquired heterotrophically from fungi in plant biomass. Based on 13C enrichment, mixotrophic orchids have previously been shown to increase shoot autotrophy level over the growth season and with environmental light availability. But little is known about the plasticity of use of photosynthetic versus fungal carbon in pyroloids. Met…

Über den Allantoinstoffwechsel des Laubmooskallus und seine Beeinflussung durch Licht

1972

Summary 1. The amount of allantoin and allantoate was determined in moss callus grown under various light conditions. It can reach 26,5 % of the plant nitrogen content. The accumulation is influenced by light intensity and colour. 2. Red-light (660 nm) causes a greater allantoin level in the cells than blue light and white light illumination. Red-light favours the formation of young setae from the moss callus. We could detect a relation between the intensity of seta-development and the amount of allantoin. The accumulation is increasing with the growth of the setae. 3. Blue-light (440 nm) enhances the chlorophyll synthesis and promotes chloroplast develop ment. This effect is correlated wit…

An innovative respirometric method to assess the autotrophic active fraction: Application to an alternate oxic-anoxic MBR pilot plant

2016

An innovative respirometric method was applied to evaluate the autotrophic active fraction in an alternate anoxic/oxic membrane bioreactor (MBR) pilot plant. The alternate cycle (AC) produces a complex microbiological environment that allows the development of both autotrophic and heterotrophic species in one reactor. The present study aimed to evaluate autotrophic and heterotrophic active fractions and highlight the effect of different aeration/non aeration ratios in a AC-MBR pilot plant using respirometry. The results outlined that the autotrophic active fraction values were consistent with the nitrification efficiency and FISH analyses, which suggests its usefulness for estimating the ni…

The role of Components of the Outer Membrane of Gram-Negative Bacteria in the Serum-Bactericidal Effect

1982

Abstract Effective killing-capacity of normal human and guinea pig sera depended on Ca ++ , C1q, C2 and C4. Fixation- and transfer-tests revealed that C1 and C1q were bound more tightly to the serum-sensitive R-forms of Salmonella strains than to the serum-resistant S-forms. Since all experiments were done in the absence of antibodies these findings provide evidence that the antibody-independent C1-binding is one of the initial reactions of the serum-mediated killing. This reaction seems to be influenced by the sugar-portion of the lipopolysaccharide (LPs) of the outer membrane: C1-binding to the bacteria occurs with higher affinity the shorter the LPS-molecule. This indicates that other ou…

Biotransformations of monoterpenes by photoautotrophic micro-organisms.

2014

Summary Monoterpenes are widely used in food technology, cosmetic and pharmaceutical industries and as compounds of agricultural importance. It is known that compounds comprising this class can be transformed by a variety of organisms, namely by: bacteria, fungi, yeasts, plants or isolated enzymes. Biotransformations, as one of the most important tools of green chemistry, allow obtaining new products using whole cells of micro-organisms or isolated enzymes in mild reaction conditions. Therefore, biotransformations of monoterpenes, by different type of reaction such as: epoxidation, oxidation and stereoselective hydroxylation, resulted in the production of so desired, enantiomerically define…

Uzņēmuma SIA "DSV Latvia" transporta vadības programmas modernizācija

2022

Loģistikas uzņēmums SIA “DSV Latvia” jau vairākus gadus darbojas veiksmīgi loģistikas nozarē Latvijā. Tās pamatprincipi balstās uz operatīvu ekselenci, kur viss notiek noteiktajā laikā un vietā, kā arī pašiem cilvēkiem - gan darbiniekiem, gan klientiem, uzturot viņu labsajūtu pēc iespējas labāku. Tomēr, attīstoties mūsdienu tehnoloģijām un arī loģistikas nozarei, uzņēmums, tieši kravu transportēšanas departamentā, atpaliek no saviem konkurentiem, jo izmanto novecojušu transporta vadības sistēmu. Pašlaik efektīvu darbību šajā departamentā uztur paši darbinieki ar savu profesionālismu un neatlaidību, tāpēc ir jārada risinājums transportēšanas vadības sistēmā situācijā, lai nākotnē tas varētu …