Ducu Stef's research while affiliated with Banat University of Agronomical Sciences and Veterinary Medicine and other places

Publications (33)

Article
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Increasing the abundance of probiotic bacteria in the gut requires either direct dietary supplementation or the inclusion of feed additives able to support the growth of beneficial commensal bacteria. In crustaceans, the increased presence of probiotic-like bacteria in the gut, including of Faecalibacterium prausnitzii (F. prausnitzii), will guaran...
Article
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The goal of this paper was to highliht the use of some algal species in bread fortification. Using data fom scientific literature, two directions were followed: highlighting the role and nutritional value of algae species; the analisys of potential benefits of the bread fortification. Food enrichment consists in the incorporation of food resources,...
Article
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Fish meat has very high water content, a very low content of connective tissue but has high digestibility. Raw fish is a very perishable food because it has all substances necessary for the development of microorganisms. Fish meat lipids are also very sensitive because they oxidize very quickly during storage. The aim of our research was to examine...
Article
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Nematopsis messor infections severely impact on shrimp’s health with devastating economic consequences on shrimp farming. In a shrimp primary intestinal cells (SGP) model of infection, a sub-inhibitory concentration (0.5%) of natural antimicrobials (Aq) was able to reduce the ability of N. messor to infect (p < 0.0001). To prevent N. messor infecti...
Article
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The destructive impact of cardiovascular diseases on health, including heart failure, peripheral artery disease, atherosclerosis, stroke, and other cardiac pathological conditions, positions these health conditions as leading causes of increased global mortality rates, thereby impacting the human quality of life. The considerable changes in modern...
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The increased resistance of campylobacters to antibiotics required the identification and isolation of novel antimicrobials able to inhibit its virulence, to cause less or no resistance and display no host toxicity. Acquiring all this knowledge was only possible through a better understanding of their antibacterial potency and of the biological mec...
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Listeriosis is an important food-borne disease responsible for high rates of morbidity and mortality. L. monocytogenes has been the cause of several foodborne outbreaks and its ability to adapt and survive in a wide range of environmental conditions makes eradication difficult. Many L. monocytogenes strains are avirulent but have the ability to inc...
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Ruminants are important reservoirs of E. coli O157:H7 and are considered as the major source of most foodborne outbreaks (e.g., 2017 outbreak in Germany, 2014 and 2016 outbreaks in United States, all linked to beef products). A promising strategy to reduce E. coli O157 is using antimicrobials to reduce the pathogen levels and/or virulence within th...
Article
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Poultry meat represents a worldwide food and can be a source of pathogen agents (Salmonella enterica spp., Escherichia coli, and Campylobacter jejuni). Therefore, identification of the best methods to reduce infections of these pathogens from poultry meat represents a critical aspect for producers. The purpose of this study was to identify the his...
Article
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The study is an analysis of the incidence of biological hazards identified in food and feed based on information from the annual reports of the Rapid Alert System for Food and Feed (RASFF) for the period 2007-2014. In terms of methodology it was resorted to the analysis of data from the notifications sent by the countries in the European Economic A...
Article
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The researches carried in this paper aimed at evaluating samples of vegetables from locality Gotlob, Timis county, in terms of content the macro elements sodium (Na), potassium (K), calcium (Ca) and magnesium (Mg). The samples of vegetables Bell Peppers (Capsicum annum), Tomatoes (Lycopersicon esculentum), Potatoes (Solanum tuberosum), Onions (Alli...
Article
The purpose of the study was to determine the effects of various types of enzymes, such as xylanase or poly-enzyme complex on productive performance, on intestinal viscosity, intestinal microflora and on some biochemical parameters of the blood. This experiment was carried out on a group of 180 broiler chickens distributed in three experimental gro...
Article
The purpose of the study was to determine the effect of various types of enzymes, such as mono-enzymes represented by xylanase, betaglucanse or poly-enzymes complex on productive performances as well as on intestinal viscosity and on some biochemical indices of sanguine indices. This experiment was carried out on a group of 200 chickens distributed...
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The experiment was performed in order to determine the protocol of xylanase utilization to fight against the anti-nutritional effect exerted by wheat non-starch polysaccharides (NSP) on intestinal wall in broilers. The experimental works were carried out on broilers, the hybrid Ross 308. We formed four experimental groups, as follows: the experimen...
Article
The objective of this experiment was to assess and fight against the NSP's anti-nutritional effect from meat chickens' alimentation. The experiment lasted for six weeks and was performed on a number of 120 chickens distributed in four experimental variants (LE1, LE2 and LE3, LE4). The hybrid used was Ross 308. We formed four experimental groups, as...
Article
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The objective of this experiment was to determine the main intestine dimension changes generated by the NSP content of the combined forage and by beta glucanase utilization in concordance with barley and wheat proportion in the structure of the combined forage for broilers. In this viewpoint, we carried out an experiment consisted of 5 experimental...
Article
The goal of this study was to determine the effect of various sources and levels of selenium on performance and meat quality of broiler chickens. The study was carried out on 120 broilers (ROSS 308) divided in four experimental groups, respectively, 30 chickens for each lot, during six weeks. The sodium selenite and Sel - Plex were the sources for...
Article
The aim of this paper was to analyze the influence of microelements source and composition on the antioxidant activity of medicinal herbs. The microelements administered through salts, at NRC (Nutrient Requirements Council) level (A) increased significantly TACFRAP (total antioxidant capacity by FRAP method) for all groups of medicinal plants (a, b...
Article
The total phenolic content and related total antioxidant capacity of 33 medicinal plants were analyzed. The total phenols were measured by Folin-Ciocalteau assay. The total antioxidant capacity (TAC) was estimated by Ferric Reducing/Antioxidant Power (FRAP), CUPRAC and DPPH assay. The total phenolic content of medicinal plant infusions ranged from...
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Some cereals like barley, oat, and wheat contain significant quantities of non-starch polysaccharides (NSP). The main problems generated by NSPs are related to their viscous nature, to the physiological and morphological effects on the digestive tract and to their interaction with the intestinal flora. The objective of this experiment was to assess...
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The study was carried out on broiler chickens divided in 3 experimental groups (E1,E2, E3), fed during 7 weeks with a diet containing 20, 70 and 200 ppm Al, as aluminium oxide/ DM of the ration, and a control group. The goal of the study was to evaluate the effect of dietary aluminium oxide on some bioproductive parameters (daily and weekly medium...
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The objective of this experiment was to assess the effect exerted by different levels and categories of non-starch polysaccharides (NSP) from wheat grains on viscosity in broilers. Wheat's percentage of participation in the forage mixture was between 0 and 40 %. The experiment was performed during 6 weeks, on 120 broilers distributed in four experi...
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The study was carried out in an aluminium industry surrounding area on purpose to evaluate dietary aluminium intake level for rent animals originated from fodder and water consumed by them. There were taken feed and water samples in different periods and from increasing distances from industrial platform, determined the aluminium level by atomic sp...
Article
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In this study, a total of eleven medicinal herbs (Rhamnus frangula, Echinaceae herba, Phoeniculus, Malva silvestris, Crataegus monogyna, Taraxacum officinale, Plantago major, Artemisia absinthium, Epilobium montanum, Chelidonium majus, Melissae Folium) from the local market were analyzed for total antioxidant and scavenging capacities. Total antiox...
Article
The aim of this study was to establish the effect of non starch polysaccharides (NSP), originating from various plant protein sources, on broiler intestinal microflora and digestive viscosity. There were 4 treatment groups divided according with the amount of crude protein (CP) administrated: EG1 (receiving feed containing 34% soybean meal in the 0...
Article
It was previously reported that essential oils from aromatic plants have an antimicrobial activity against many bacterial pathogens [13]. We have conducted an in vivo experiment to study the effect of some aromatic plants and in particular to investigate the effect of oils extracted from these plants at the immune level and duodenal morphology. Dur...
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The paper deals with determination of cation concentrations in natural mineral water of various areas in Romania. Nine types of mineral water were examined in three different regions of the country: west, centre and north. Cation determination was done with high-performance ion chromatography (HPIC). The device used was a Dionex - ICS 3000 type, pa...
Article
The estimation of food products quality could be a problem for researchers. It is possible to have a lot of good physical and chemical determinations and the estimation of food products quality to be wrong. This was the main reason for elaborate this paper. Three methods of the food products quality estimation will be present in this study. For acc...
Article
Microelements , in inorganic form or bind in different combinations (Sel Plex and Fritta), action on humans and animals health, bioproductive performances and meat quality. It were analysed the microelements content for eleven medicinal plants (herbs). The analysed microelements were: Zinc, Manganese, Iron, Copper, Lead and Nickel. Mineral contents...
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Cereals and protein sources are an important ingredient in feed for poultry. The NSP content and their solubility are the main reasons for antinutritive effects of these cereals, especially in young poultry (Choct and Annison 1990). The purpose of this study was the evaluation of NSPs level and viscosity of some fodder components (maize, barley, wh...
Article
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The paper aims to review the development of non-animal foodstuff processing units from Iasi County and their capacity to make safe and quality foods in according with European norms, transposed into national legislation of our country. Methodological, were processed, analysed and synthesized information gathered after controls made by DSVA Iasi ins...

Citations

... A mixture of organic acids and plant extracts have been extensively investigated for their role in preventing pathogen attachment [14] and invasion of epithelial cells in vitro [15], for improving the host immune system [16], for downregulating the expression of bacterial virulence genes and for enhancing gut health and animal performance in vivo [17]. Some of these effects are the direct result of enhanced probiotic presence [18], leading to pathogen exclusion and decreased inflammation in vivo [19]. ...
... PUFA, such as eicosapentaenoic acid (EPA, 20:5 ω-3), docosahexaenoic acid (DHA), α-linolenic acid (ALA, 18:3 ω-3), linoleic acid (LA, 18:2 ω-6), or arachidonic acid (AA, 20:4 ω-6), have a particular role in counteracting cardiovascular diseases. They may regulate the antioxidant signaling pathway and modulate inflammatory processes [1][2][3]. EPA and DHA, in particular, have been found to produce both vaso-and cardio-protective responses via the modulation of membrane phospholipids, thereby improving cardiac mitochondrial function and energy production [4][5][6], lowering triglyceride concentrations, or inhibiting platelet activity [7]. ...
... Additionally, this interconnection led to increased butyrate release in the culture supernatant. Conclusively, mixtures of organic acids, can lead to pathogen exclusion [14][15][16]18,48,49] by promoting the growth of probiotic-like bacteria and can stimulate the production of SCFAs with a health-beneficial effect on the host. ...
... are rod-shaped, Gram-positive bacteria commonly found in assorted food products and on industrial surfaces; they are notorious for causing life-threatening infections known as listeriosis and septicemia [22,110]. Several outbreaks were associated with the consumption of contaminated dairy and ready-to-eat (RTE) products, including fruit and vegetables [111]. Biocide tolerance in L. monocytogenes strains (Table 5) shares similar mechanisms to antibiotic tolerance [112]. ...
... E. coli in the logarithmic phase were treated with whey protein and blueberry juice mixture systems using by lactobacillus fermentation for 10 h. The protein content in the supernatants was assessed using the Pierce BCA Protein Kit (Thermo Scienti c) purchased from Nanjing Jiancheng Bioengineering Institute (Nanjing, China) [13] . ...
... Fermentation results can increase feed intake, growth rate, and improve feed conversion ratio in chickens [11]. Quality of raw materials, nutritional content, mycotoxin contamination, and physical quality of feed (particle size) can accelerate or slow down the movement rate in the digestive tract (feed passage) [12]. Increased viscosity of intestinal lumen contents can reduce digestibility, bowel performance, and inhibit the movement of particles and solutes in the intestinal lumen, thereby supporting the growth of intestinal bacteria [13]. ...
... The sodium content varied in the second harvest year of conventional and organic raspberries. Moreover, other studies showed a much higher sodium content than our findings [25,28,35]. The sodium content in the cultivars Meeker and Willamette, reported by Pavlović, et al. [32] corresponded to that found in our raspberry fruits in the first year of harvest. ...
... mg/L of Li in spring and medicinal waters produced in Poland with the higher values observed for the latter [70]. In German, mineral waters were reported to contain 1.5-1320 μg/L of Li [71]; while in Romania, the highest concentration was as low as 0.0719 μg/L [72]. These differences in Li concentrations are likely caused by different ambient Li contents in various geographical regions. ...
... Allicin improved the immunity of young animals (Wang et al., 2011) by elevating immunoglobulins levels of types IgG and IgM (Alam et al., 2018), and increasing phagocytosis and stimulating lymphocyte proliferation (Wang et al., 2011). This might be attributed to the positive effect of medicinal plants on the immune response that is advantageous for the animal as a whole (Lavinia et al., 2009). ...
... Stef et al. have analyzed the total antioxidant and scavenging capacity of PM, among many other herbal medicines. 47 According to their study, PM can be regarded as an antioxidant compound due to its reducing power and radical scavenging capacity. 47 Likewise, Kumarasamy et al. have reported that PM seed extracts exhibited high levels of free radical scavenging activity and inhibited lipid peroxidation. ...