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Pasarin B.,University of Agricultural Sciences and Veterinary Medicine, Iasi
AACL Bioflux | Year: 2010

The present paper summarizes the Pricopian theory of sexuality, discussed in the context of fishes' sex determination. On a logical approach and considering the most recent genetic evidences reported from studies on bacteria, invertebrates, fish, frogs, reptiles, birds, mammals and even humans, one may allready abandon the chromosomal concept of the sex determination (such as the dosage of Z chromosomes). The sex-determining locus is not a true locus, but an agglomeration of loci very seldom separated by genetic recombination. Moreover, the W chromosome in ZZ-ZW systems and the Y in XXXY systems are not empty at all, but still carry information.

Motrescu I.,University of Agricultural Sciences and Veterinary Medicine, Iasi | Nagatsu M.,University of Shizuoka
ACS Applied Materials and Interfaces | Year: 2016

With respect to microsized surface functionalization techniques we proposed the use of a maskless, versatile, simple tool, represented by a nano- or microcapillary atmospheric pressure plasma jet for producing microsized controlled etching, chemical vapor deposition, and chemical modification patterns on polymeric surfaces. In this work we show the possibility of size-controlled surface amination, and we discuss it as a function of different processing parameters. Moreover, we prove the successful connection of labeled sugar chains on the functionalized microscale patterns, indicating the possibility to use ultrafine capillary atmospheric pressure plasma jets as versatile tools for biosensing, tissue engineering, and related biomedical applications. © 2016 American Chemical Society.

Gilca V.,University of Agricultural Sciences and Veterinary Medicine, Iasi
AACL Bioflux | Year: 2010

The experiment was organized to investigate the recovery of additional food (fodder and terrestrial vegetation) given to fish, Ctenopharyngodon idella, in particular through the study of nutrient digestibility. Studied forage digestibility was determined through laboratory experiments, conducted between June 20 to 30, 2009, using 10 individuals of the species Ctenopharygodon idella from fish farm Movileni, Iaşi. There were formed two experimental groups, each of five individuals per group, differentiation between the two groups was the type of feed used, respectively specific fodder and green clover green mass harvested in bud's phase. To determine organic matter digestibility from feed we used the direct method, which consists in weighing all feed ingested, scrap feed and faeces removed. For this purpose in each aquarium was placed one fish, after which the tanks were covered with netting and set with oxygenation of the water pump. Statistical analysis of the data obtained from the experiment shows that the average values of the coefficients of digestibility of nutrients from fodder and green clover have been very significant differences. If we compare the mean values of digestibility coefficients of organic substances in the two types of forage (green clover and fodder) we can say that the fodder is digested and assimilated better than clover. Thus, in fodder at a protein content of 378.7 g / kg DM (dry matter), there was a digestibility coefficient of 92%, while at a lower protein content of 312.5 g / kg DM, in the case of green clover, the digestibility coefficient was 69%.

Fetecau C.,Technical University Gheorghe Asachi | Imran M.,Salam University | Burdujan I.,University of Agricultural Sciences and Veterinary Medicine, Iasi
Zeitschrift fur Angewandte Mathematik und Physik | Year: 2010

Exact solutions corresponding to the unsteady helical flow of an Oldroyd-B fluid due to an infinite circular cylinder subject to torsional and longitudinal time-dependent shear stresses are established using Hankel transforms. These solutions, presented under series form in terms of Bessel functions J0(·), J1(·) and J2(·), can be easily specialized to give the similar solutions for Maxwell, Second grade and Newtonian fluids performing the same motion. Some characteristics of the motion, as well as the influence of pertinent parameters on the velocity profiles, are underlined by graphical illustrations. © 2009 Birkhäuser Verlag Basel/Switzerland.

Tarcau D.,University of Agricultural Sciences and Veterinary Medicine, Iasi | Cucu-Man S.,Al. I. Cuza University | Boruvkova J.,Masaryk University | Klanova J.,Masaryk University | Covaci A.,University of Antwerp
Science of the Total Environment | Year: 2013

Concentrations of organochlorine pesticides (OCPs), polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDE) have been determined in soil, mosses and tree bark samples collected from the same locations in North-Eastern Romania (region of Moldavia). PCBs and PBDEs were under the limit of quantification in all investigated samples. OCPs were the principal pollutants found in the analysed samples. In soil, moss and tree bark samples, DDT together with its metabolites, was the most abundant OCP ranging between 4.4-79, 5.8-95 and 11-440ngg-1 in the individual matrices, followed by HCH isomers with levels between 1.1-9.8, 8.9-130 and 12-130ngg-1 in soil, moss and bark respectively. To distinguish between the previous and current pollutant input and preferential biodegradation of DDT metabolites, the degradation ratios were calculated between the parent substances and their metabolites (DDT and HCH isomers). The investigation indicates no important pollution sources near sampling sites and reveals that OCPs originate mainly from long-range air transport processes and through atmospheric deposition of isomers volatilised from secondary sources. Discriminant function analysis was performed to determine whether OCPs uptake differ among the three matrices (soil, moss and tree bark). A good separation was observed between tree bark and the other two matrices. The most redundant variable appears to be p,p'-DDE (R2=0.336), while the most informative variable seems to be o,p'-DDT (R2=0.0361). Significant correlations were found between bark and moss concentrations for most α-HCH and p,p'-DDD (p<0.01). We have also investigated the enantiomeric signature of α-HCH. For bark and moss, EF values suggest preferential degradation of the (-)α-HCH enantiomer. © 2013 Elsevier B.V.

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