The aquatic ecosystems of the Arctic part of the Russian shelf, including bodies of fresh water, are characterized by unique geophysical conditions that determine the extreme properties of the environment. The hydroecosystems of the Arctic region, which are vulnerable by their nature, as well as the aquatic ecosystems of other geographical zones, are equally exposed to anthropogenic pollution, but in their case it is much more difficult to cope with pollution means. Improvement of the state of water bodies, including those used for trout breeding, as well as increase of their regenerative potentials is possible only through optimization of biochemical processes of transformation of pollutants. The processes of self-purification of natural water bodies are caused by numerous physical, chemical and mechanical factors, but are carried out by aquatic biota, primarily organotrophic bacteria. It is microorganisms that consume substances that are pollution for other hydrobionts in the course of their life [1]. It is obvious that organisms living in extreme conditions of the Arctic region have formed adaptations to them and can have unique properties, and, consequently, a great biotechnological potential. The study of the role of indigenous microorganisms in reducing the level of anthropogenic pressure on the Arctic ecosystems is very relevant. In this work the phosphate-accumulating ability of microorganisms� groups that synthesize bioflocculant is estimated. The influence of several different factors on the processes of phosphate accumulation is researched via modelling of the cultivation conditions. In the experiment, microorganisms with flocculating activity of more than 60 %, belonging to the bacteria of the Pseudomonas and Aeromonas genera, previously obtained from various aquatic ecosystems, were used. The growth rates of each culture on the media of different composition varied within 2-3 orders of magnitude and correlated with the relative phosphorus content in the medium. The formation of floccules in non-replaceable nutrient media with phosphorus content from 120 to 980 mg/l occurred in the period from 5 to 10 days of cultivation. The rate of flakes formation did not depend on the concentration of phosphorus in the medium. The ability of microbial cultures to mobilize different forms of phosphorus, along with the bioflocculant-producing activity, was influenced by the concentration load and the duration of cultivation of the strains.
In this paper, by using Mawhin\'s continuation theorem of coincidence degree theory and analysis techniques, we prove the existence\nand uniqueness of a T-periodic solution for the fourth-order neutral functional differential equation. An example is also provided to illustrate our main result.
In this paper, we consider some characteristic of interpolation spaces of Banach spaces, and establish some\n simple properties for interpolation spaces associated with the domain of a generator of a $C_0$-semigroup,\n which is applicable for the maximal regularity and the existence of solutions of abstract Cauchy problems of parabolic type with unbounded operators.
It is a global trend that medicinal plants play a major role for providing health benefits more safely to human. However, the complex composition of medicinal plant based drugs has a major challenge for quality control. Majority of Ayurveda preparations are plant based drugs. Therefore, phytochemical analysis is the most important part for standardization of these medicinal plant based drugs. Two most important decoctions i-e Nagaradi Kashaya (decoction) and Daruparpatadi Kashaya (decoction) were selected from the Ayurveda Pharmacopoea. These two compound preparations are commonly used in the treatment of respiratory tract diseases. Preparation of decoctions and phytochemical study both were done at the Institute of Indigenous Medicine, University of Colombo, Rajagiriya. This comparative phytochemical study revealed that the both compound preparations contained Alkaloids, Tannins and Phenolic compounds, Terpenoids and steroids, Flavonoids, Cardiac Glycosides, Saponins, Carbohydrates, and Amino Acids. In most instances sample of Daruparpatadi decoction reveals high response to the phytochemical tests than the sample of Nagaradi decoction. Therefore, it can be concluded that Daruparpatadi decoction potentiate more than Nagaradi decoction for the respiratory disorders.
The terminal work presented comprises the application prototype for image recognition that allow us to identify diseases in tomato crops based on image recognition through deep learning techniques. A classification efficiency of 98.82% is achieved.
Uncertainty is an integral part of CMM measurement result. Moreover, any problem in the specification of tolerance or in the measurement phase of toleranceisrelated to uncertainty, but fewmeasurementmethods are available to integrate this knowledge. In this paperwe present the current situation of uncertainty calculation using CMM, analyzing at the same time a future research activityand including some specific areas to be taken into consideration.Future research on improvement state-of-the-art coordinate measuring machine Uncertainty Evaluating Software (UES) is presented
In this work, simple analytical solution of the diffusion equation is obtained under the boundary conditions which contain the deposition of pollutants on the ground surface. The vertical eddy diffusivity is assumed as power law of �z�, to be limited by an elevated mixing height. Also the decay time dependent is calculated. The resulting analytical formula is obtained by using power law, standard, and Brigg�s methods for estimating dispersion parameters. The proposed model has been compared with observed data from the research reactor at Inshas and Hanford experiment in unstable and stable conditions respectively.