1,901 research outputs found
Assessment of Physicochemical Parameters from Vermicompost of Eudrilus eugenae and Esienia foetida
In present investigation attempt has been made to investigate the physicochemical parameters like pH, temperature, moisture, salinity, nitrogen, electrical conductivity, nitrate, phosphate, chemical oxygen demand (COD) and biological oxygen demand (BOD) from vermicompost of Eudrilus eugenae and Esienia foetida species. The shade of size 10x10 meter and height 1.98 meter was constructed for rearing Eudrilus eugenae and Esienia foetida species. The production of vermicompost was found better in Eudrilus eugenae than Esienia foetida
DEVELOPMENT AND VALIDATION OF UV SPECTROSCOPIC METHOD FOR ESTIMATION OF ABACAVIR IN TABLET DOSAGE FORM
Objective: To develop and validate simple, rapid, linear, accurate, precise and economical UV Spectroscopic method for estimation of Abacavir in tablet dosage form.
Methods: The drug is freely soluble in analytical grade methanol. The drug was identified in terms of solubility studies and on the basis of melting point done on the melting point apparatus of Equiptronics. It showed absorption maxima were determined in analytical grade methanol. The drug obeyed the Beer’s law and showed good correlation of concentration with absorption, which reflect in linearity. The UV spectroscopic method was developed for estimation of Abacavir in tablet dosage form and also validated as per ICH guidelines.
Results: The drug is freely soluble in analytical grade methanol, slightly soluble in water and practically insoluble in ethanol. So, the analytical grade methanol is used as a diluent in method. The melting point of Abacavir was found to be 164-165 ˚C (uncorrected). It showed absorption maxima 256 nm in analytical grade methanol. On the basis of absorption spectrum the working concentration was set on 15µg/ml (PPM). The linearity was observed between 5-25 μg/ml (PPM). The results of analysis were validated by recovery studies. The recovery was found to be 98.75, 101 and 99.17% for three levels respectively. The % RSD for precision was found to be 0.32% and for Ruggedness is 0.46%
Conclusion: A simple, rapid, linear, accurate, precise and economical UV Spectroscopic method has been developed for estimation of Abacavir in tablet dosage form. The method could be considered for the determination of Abacavir in quality control laboratories
HISTOCHEMICAL INVESTIGATION OF TWO MEDICINAL PLANTS IN MAHARASHTRA
The histochemical studies of leaves and wood of Butea monosperma ÂLam and Madhuca indica Gmel. are medicinal important plants in Maharashtra. For histochemical studies the free hand sections of leaves and wood were taken and treated with the respective reagent in localize components, viz. starch, protein, tannin, saponin, fat, glucosides and alkaloids in the tissues. Key words: Histochemistry, starch, protein, tannin, saponin, fat, glucosides and alkaloid
A validation of the Oswestry Spinal Risk Index
Purpose
The purpose of this study was to validate the Oswestry Spinal Risk Index (OSRI) in an external population. The OSRI predicts survival in patients with metastatic spinal cord compression (MSCC).
Methods
We analysed the data of 100 patients undergoing surgical intervention for MSCC at a tertiary spinal unit and recorded the primary tumour pathology and Karnofsky performance status to calculate the OSRI. Logistic regression models and survival plots were applied to the data in accordance with the original paper.
Results
Lower OSRI scores predicted longer survival. The OSRI score predicted survival accurately in 74% of cases (p = 0.004).
Conclusions
Our study has found that the OSRI is a significant predictor of survival at levels similar to those of the original authors and is a useful and simple tool in aiding complex decision making in patients presenting with MSC
Bubble size prediction in gas–solid fluidized beds using genetic programming
The hydrodynamics of a gas–solid fluidized bed (FB)
is affected by the bubble diameter, which in turn
strongly influences the performance of a fluidized bed
reactor (FBR). Thus, determining the bubble diameter
accurately is of crucial importance in the design and
operation of an FBR. Various equations are available
for calculating the bubble diameter in an FBR. It has
been found in this study that these models show a
large variation while predicting the experimentally
measured bubble diameters. Accordingly, the present
study proposes a new equation for computing the
bubble diameter in a fluidized bed. This equation has
been developed using an efficient, yet infrequently
employed computational intelligence (CI)-based datadriven
modelling method termed genetic programming
(GP). The prediction and generalization performance
of the GP-based equation has been compared with
that of a number of currently available equations for
computing the bubble diameter in a fluidized bed and
the results obtained show a good performance by the
newly developed equation
Coordination of Mobile Mules via Facility Location Strategies
In this paper, we study the problem of wireless sensor network (WSN)
maintenance using mobile entities called mules. The mules are deployed in the
area of the WSN in such a way that would minimize the time it takes them to
reach a failed sensor and fix it. The mules must constantly optimize their
collective deployment to account for occupied mules. The objective is to define
the optimal deployment and task allocation strategy for the mules, so that the
sensors' downtime and the mules' traveling distance are minimized. Our
solutions are inspired by research in the field of computational geometry and
the design of our algorithms is based on state of the art approximation
algorithms for the classical problem of facility location. Our empirical
results demonstrate how cooperation enhances the team's performance, and
indicate that a combination of k-Median based deployment with closest-available
task allocation provides the best results in terms of minimizing the sensors'
downtime but is inefficient in terms of the mules' travel distance. A
k-Centroid based deployment produces good results in both criteria.Comment: 12 pages, 6 figures, conferenc
Automated team selection and compliance checking in business processes
Plenty of activities in many business contexts must be performed
collaboratively, e.g., in a hospital or when organising
a conference. Tasks such as team composition and allocation
are usually performed manually and on the ground of
limited criteria such as individual skills, a.o. because adequate
automatic support is missing. This paper addresses
this shortcoming. We present an approach for team selection
and compliance checking in business processes, which
includes (i) a language for describing teams; (ii) a way to de-
ne team selection conditions and policies related to team
composition; and (iii) a mechanism for the automatic resolution
of the team selection conditions and for team-related
compliance checking based on formal ontologies.Austrian Research Funding Association (FFG) 845638 (SHAPE)Ministerio de Ciencia e Innovación TIN2009-07366 (SETI)Ministerio de Economía y Competitividad TIN2012-32273 (TAPAS)Junta de Andalucía TIC-5906 (THEOS
The Effects of Cocaine on Different Redox Forms of Cysteine and Homocysteine, and on Labile, Reduced Sulfur in the Rat Plasma Following Active versus Passive Drug Injections
Received: 28 November 2012 / Revised: 19 April 2013 / Accepted: 6 May 2013 / Published online: 16 May 2013
The Author(s) 2013. This article is published with open access at Springerlink.comThe aim of the present studies was to evaluate
cocaine-induced changes in the concentrations of different
redox forms of cysteine (Cys) and homocysteine (Hcy),
and products of anaerobic Cys metabolism, i.e., labile,
reduced sulfur (LS) in the rat plasma. The above-mentioned
parameters were determined after i.p. acute and
subchronic cocaine treatment as well as following i.v.
cocaine self-administration using the yoked procedure.
Additionally, Cys, Hcy, and LS levels were measured
during the 10-day extinction training in rats that underwent
i.v. cocaine administration. Acute i.p. cocaine treatment
increased the total and protein-bound Hcy contents,
decreased LS, and did not change the concentrations of Cys
fractions in the rat plasma. In turn, subchronic i.p. cocaine administration significantly increased free Hcy and lowered
the total and protein-bound Cys concentrations while
LS level was unchanged. Cocaine self-administration
enhanced the total and protein-bound Hcy levels, decreased
LS content, and did not affect the Cys fractions. On the
other hand, yoked cocaine infusions did not alter the concentration
of Hcy fractions while decreased the total and
protein-bound Cys and LS content. This extinction training
resulted in the lack of changes in the examined parameters
in rats with a history of cocaine self-administration while in
the yoked cocaine group an increase in the plasma free Cys
fraction and LS was seen. Our results demonstrate for the
first time that cocaine does evoke significant changes in
homeostasis of thiol amino acids Cys and Hcy, and in some
products of anaerobic Cys metabolism, which are dependent
on the way of cocaine administration
Dense active matter model of motion patterns in confluent cell monolayers
Epithelial cell monolayers show remarkable displacement and velocity
correlations over distances of ten or more cell sizes that are reminiscent of
supercooled liquids and active nematics. We show that many observed features
can be described within the framework of dense active matter, and argue that
persistent uncoordinated cell motility coupled to the collective elastic modes
of the cell sheet is sufficient to produce swirl-like correlations. We obtain
this result using both continuum active linear elasticity and a normal modes
formalism, and validate analytical predictions with numerical simulations of
two agent-based cell models, soft elastic particles and the self-propelled
Voronoi model together with in-vitro experiments of confluent corneal
epithelial cell sheets. Simulations and normal mode analysis perfectly match
when tissue-level reorganisation occurs on times longer than the persistence
time of cell motility. Our analytical model quantitatively matches measured
velocity correlation functions over more than a decade with a single fitting
parameter.Comment: updated version accepted for publication in Nat. Com
Gradient Methods for Solving Stackelberg Games
Stackelberg Games are gaining importance in the last years due to the raise
of Adversarial Machine Learning (AML). Within this context, a new paradigm must
be faced: in classical game theory, intervening agents were humans whose
decisions are generally discrete and low dimensional. In AML, decisions are
made by algorithms and are usually continuous and high dimensional, e.g.
choosing the weights of a neural network. As closed form solutions for
Stackelberg games generally do not exist, it is mandatory to have efficient
algorithms to search for numerical solutions. We study two different procedures
for solving this type of games using gradient methods. We study time and space
scalability of both approaches and discuss in which situation it is more
appropriate to use each of them. Finally, we illustrate their use in an
adversarial prediction problem.Comment: Accepted in ADT Conference 201
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