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Calcium carbonate-carboxymethyl chitosan hybrid materials
No full textIn the present work, precipitated calcium carbonate (PCC) and carboxymethyl chitosan
(CMC) were prepared to obtain new hybrid materials used in papermaking. In the first step, oc‐
curred the precipitation of CaCO3 in solution containing CMC at different levels (0.5%, 1%, and
1.5%). In the second step, PCC–CMC hybrid material (25%) was added to pulp suspension, and the
sheets were made. The effect of PCC–CMC on paper properties (mechanical and optical) was sys‐
tematically investigated. Breaking length, the brightness and opacity of the sheets obtained with
the PCC–CMC material were better than the sheets fabricated with the unmodified PCC at similar
levels of content
The rat and the sheep, animal models for the study of periodontitis and induced periimplantitis of bacterial strains specific to human oral microbiote
No full textPeriodontitis and periimplantitis are two diseases that have as a common element the progressive loss of alveolar bone,
eventually leading to the loss of teeth and dental implants. The causes of the two diseases are multiple but the
composition of the local bacterial biofilm is one of the important triggers. The aim of this review was to establish the
main bacterial strains that can induce experimental periimplantitis and periodontitis as well as the techniques by which
diseases can reproduce. The rat and the sheep are commonly used animal models in this branch of research because it
reflects the main characteristics of human periodontitis or periimplantitis. The results obtained from the recent literature
show that Porfiromonas gingivalis, Aggregatibacter actinomicemcomitans, Streptococcus oralis or Fusobacterium
nucleatum (bacterial species commonly found in the human oral microbiota) are among the bacteria that can easily
reproduce the two diseases of the oral cavity. Induction techniques include oral gavage, ligation technique,
lipopolysaccharide injection, or the use of preinfected implant devices. The data accumulated in this review will be
useful for research on the pathology of periodontal or periimplant diseases but also the approach of innovative
therapies
The influence of dehulling on the nutritional quality of lupine seeds (Lupinus albus L.) and the effect of their use in the feed of laying quails on the live performance and quality of eggs
No full textLupinus albus seeds from low-alkaloid varieties are a valuable alternative source of protein
for reducing the dependence on soybean meal for the feeding of monogastric animals. Therefore,
the aim of this research was to evaluate the dehulling influence of lupine seeds (L. albus, cv. Amiga)
and the effect of their use in the laying quails feed on live performance and egg quality. A total
of 200 laying quails (Coturnix japonica), with an age of 10 weeks, were randomly assigned to five
experimental groups (five replicates/group). Each group was randomly assigned to one of five
dietary treatments: the control group (C) diet was based on soybean meal, while the experimental
groups received either 200 g/kg (WLS20) or 250 g/kg (WLS25) of whole lupine seeds in their diets, or
200 g/kg (DLS20) or 250 g/kg (DLS25) of dehulled lupine seeds in their diets. The results show that
by dehulling the lupine seeds, the nutritional value of the seeds increased. The use of dehulled lupine
seeds in the diet of laying quails did not affect the live performance (egg production, feed intake,
feed conversion ratio), yolk cholesterol content, and physico-chemical quality indices of the eggs,
compared with control. The presence of dehulled lupine seeds in the diet improved the nutritional
quality of the yolk lipids because of the increase in the content of polyunsaturated fatty acids. Thus,
the lipid quality indices of the yolk became more favorable to consumer health because of an increase
in the h/H ratio (hypocholesterolemic/Hypercholesterolemic FA) and a decrease in the atherogenic
index and thrombogenic index values. The higher content in carotenoids also contributed to the
higher nutritional quality of the eggs obtained by lupine utilization. In conclusion, dehulling of
lupine seeds had a positive influence on the nutritional quality of the seeds, the live performance of
quails, and the quality of eggs
Research on the resistance of some wheat varieties at the attack of diseases in the north-east region of Moldova
No full textAnaliza condiţiilor de mediu într-o seră bloc de cercetare automatizată în cultura de tomate
Get PDFTomato production is directly influenced by the environmental conditions. To optimize the production, these factors should be monitored and controlled. The current paper follows a case study of the environmental conditions in an automated research greenhouse located in the USAMV campus in Bucharest, Romania. Three factors were analyzed – inside temperature, relative humidity and CO2 concentration. A comparison between the optimal conditions and those recorded in the greenhouse was done. The results indicated differences between the optimal factors and the greenhouse values. As such, the highest recorded inside temperature was significantly higher than the optimal one. Significant differences were also found for the relative humidity and CO2 concentration. Ultimately, these translate into a reduced tomato production. Due to the regional climatic conditions, reducing the inside temperature is only achievable through the upgrade of greenhouse equipment. For the USAMV greenhouse, future research should cover the benefits of a heat pump system over the current fossil fuel technology. Recent studies illustrated an increase in crop productivity and energy efficiency in heat pump based greenhouses compared to the traditional heating and cooling options
Collection of blastomeres in order to establish sex and isolate genetic material-review
Get PDFGlobally, limited access to food needs in relation to meat or milk production has required the establishment of the sex of
offspring from the embryonic stage. While the meat industry uses males, the dairy industry relies on females. During
the period of exploitation, the number of products obtained from a female bovine is 5-6 individuals, their sex being
able to be influenced by means of sexed semen. Embryo sexing programs can result in a large number of conception
products, in a shorter period of time taking into account the desired sex. The use of the desired sex embryo facilitates
the improvement of the genetic value. Embryonic sexing procedures involve the collection by biopsy of a minimum
amount of genetic material that can ensure the determination of sex. Both invasive and non-invasive biopsy and sexing
procedures can influence the subsequent viability of embryos prepared for embryo transfer. This paper highlights the
methods of embryonic sexing along with the advantages and disadvantages of each technique involved in determining
sex
Research on influence on performance of growing technology production and health carp population of Moldova Podu Iloaiei
No full textPhytocomplex with Zingiber officinale extract, Piper nigrum and Piper cubeba oil - in vitro antimicrobial effect
No full textVegetal compounds are known for their therapeutic actions in correlation with their antioxidant activity so that in recent
times the interest in their properties has greatly increased.
The phytocomplex obtained by combining the Zingiber officinale extract, Piper nigrum and Piper cubeba oil is
distributed and recommended in European space as a multi-benefit nutritional supplement for swine, poultry, cattle,
horses and others. As the individual properties of the three compounds are known, we aimed to test the antimicrobial
activity of the phytocomplex on various Gram negative pathogens.
In the time-kill assay, in vitro inhibitory effects were visible after 15 minutes of contact and total inhibition of the
species Samonella enteritidis, Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa was obtained after 24
hours.
The results obtained in vitro showed a very good antimicrobial activity which clearly contributes to the overall
beneficial effects of the Zingiber officinale extract, Piper nigrum and Piper cubeba oil phytocomplex