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Research on establishing the optimal growth density of rainbow trout (Onchorhynchus Mykiss) in recirculated systems in Romania
No full textThis study aimed to establish the optimum population density of the basins (with a useful volume
of 45 m3 / basin), in order to increase the rainbow trout (Oncorhynchus Mykiss), in the
recirculated system, in correlation with obtaining a higher technological efficiency. The study was
carried out over a period of 90 days aimed at monitoring the technological performances, by
performing period weighing, adjunsting the quantities of extruded combined feeds that were
administred to the fishes, as the quantitative growth of the crop biomass.
The control fishing was carried out three times a month. In order to establish the optimum
storage density, the three experimental pools from the recirculated system component were
populated with a different number of specimens, to allow the possibility of testing three different
storage densities
Studiul unor vinuri spumante obţinute din soiuri autohtone de struguri albi în podgoria Cotnari
Get PDFCotnari vineyard is one of the oldest vineyards in Romania
with a long history in wine production, the first historical mentions of the
Cotnari vineyard dating from the 14th century. The terroir conditions in this
vineyard allow production of both still wines and, more recently, sparkling
wines of the highest quality. The study aimed to obtain data on the sensory
analysis of the following sparkling wines: Frâncuşă 2017 (V1), Frâncuşă 2018
(V2), Grasă de Cotnari 2017 (V3), Grasă de Cotnari 2018 (V4), Tămâioasă
românească 2017 (V5), Tămâioasă românească 2018 (V6), and also their
correlation with the results obtained from the physico-chemical analyses
performed. The sensory analysis was performed in two stages (a series of
sensory indices specific to sparkling wines obtained in the Cotnari vineyard
were identified and then, a quantitative analysis, by allocating scores from 0 to
9 for the previously established indices). Regarding the physical-chemical
analyses, the following parameters were of interest: alcohol concentration, total
acidity, density, total dry extract and non-reducing dry extract, sugars, free and
total sulphur dioxide
Digital natives and immigrants. Finding the gap
No full textThe presented paper investigates the needs of digital immigrants (generally those born before the year 1985 (those
before the Millennial generation are considered to be digital immigrants and those born after 1985 are digital natives,
having grown up only in a world defined by the internet and smart devices, Prensky, 2001). Digital immigrants should
integrate and use the ICT argued for the introduction of Information and Communication Technologies (hereinafter
ICT) in public policies in education. However, there is consensus on four basic arguments (OECD, 2001): are a basic
skill, such as reading, writing, and math, they represent an opportunity for economic development and a requirement for
employment, they are a tool for school management, they are a tool that improves the teaching and learning process.
The first two arguments are linked to the potential socioeconomic benefits attributed to the use and appropriation of
ICTs. These have an impact on human development, both that one of the development goals for the millennium
postulates that it is necessary to “ensure that can take advantage of the benefits of new technologies, in particular those
of information and communications” (ONU, 2013). In relation to the potential economic benefits, it is reasonable to
assume that, with the use of ICT, the inhabitants of developed countries acquire skills and competencies that
complement their possibilities to function successfully in society. However, these arguments should be considered with
more caution in developing countries, since in these people do not necessarily have the basic skills necessary to
effectively take advantage of the potential of ICT
Results concerning Tanymecus dilaticollis control in a commercial farm from the South-East of Romania, in the conditions of the year 2020
No full textThe maize leaf weevil (Tanymecus dilaticollis Gyllenhal, 1834) represent one of the most destructive pests of maize
crops in Romania, especially in the south and south-east of the country. Every year was attacked more than 1 million
hectares cultivated with maize. This pest is very dangerous when maize is in early vegetation stages, from plant
emergence until four leaves (BBCH 10-BBCH 14). After the ban of the seeds treatment with neonicotinoids in the
Europe Union, no alternatives for seed treatment to control this pest remain available in our country. In this article, it
has assessed both, seeds treatment with neonicotinoids and possible alternatives for controlling of the maize leaf weevil
in conditions of the commercial farm located in the south-east of Romania. Seeds treatment with imidacloprid (600 g/l),
cyantraniliprole (625 g/l) active ingredients, maize foliar treatment with acetamiprid (20 %), lambda-cyhalothrin (50
g/l) active ingredients, granules application at maize sowing, with chlorpyrifos (5 %), lambda-cyhalothrin (4 g/kg)
active ingredients or two granules application, at maize sowing and after plants emergence with cypermethrin (0.8 %)
active ingredients were assessed. The efficacy of the applied insecticides was determined by evaluating weevils attack
intensity at the maize plants, at BBCH 14 stage, using a scale from 1 (plant not attacked) to 9 (plant destroyed). In the
spring of 2020, weather conditions from the experimental site, during assessments period were unfavorable for weevils
activity at the soil surface. Even if the pest density from the experimental location was high (10-15 insects/m2
) however
weevils attack at maize plants was low. At variant with seeds treated with imidacloprid active ingredient, maize attack
intensity at maize plant was 3.86, at untreated variant attack intensity was 4.47 while at rest of the experimental
variants, attack intensity ranged between 4.29 and 4.46. It has registered significant statistical differences between
weevils attack at maize plants from variant with seeds treated with imidacloprid active ingredient and the rest of the
variants from this assessment (p<0.05). In the weather conditions of the year 2020, from the experimental location from
the south-east of Romania, there weren’t registered significant statistical differences between seeds treatment with
cyantraniliprole active ingredient, maize foliar treatment with acetamiprid, lambda-cyhalothrin active ingredients,
granules application with chlorpyrifos, cypermethrin, lambda-cyhalothrin active ingredients, and untreated variant
(p<0.05)
Identificarea in silico a genelor implicate in transportul si metabolismul purinelor in Medicago truncatula
Get PDFLeguminous plants grow on nitrogen-limited soils based on their
symbiosis with rhizobial nitrogen-fixing bacteria. This symbiosis provides
the majority of biologically available nitrogen for cycling in the biosphere
and serves as an important natural fertilizer in agricultural systems by
allowing natural enrichment of soils with nitrogen. In consequence,
leguminous plants are a crucial part of the human diet and of animal feeds
and their optimal growth is of major economical and agricultural
importance. Better knowledge on the genetic and metabolic regulation of
symbiotic nitrogen fixation, can be implemented for improvements on the
efficiency of such systems in the field. For this purpose, a bioinformatics
approach was undertaken to study purine transport and metabolism, an
aspect not studied in the past. Several Medicago truncatula genes involved
in purine transport and metabolism were identified including the nodulespecific purine permease Pup1 and the nodule-induced genes coding for
adenine phosphoribosyltransferase-like protein (APT1), adenosine/AMP
deaminase (AMPD), inosine-uridine preferring nucleoside hydrolase
(IUNH5) and nucleobase-ascorbate transporter-like protein (NAT14)
Quality assessment of the feed in dairy cows diet from a Bucovina Farm
No full textThe study was conducted on a cattle farm with a number of 200 cows located in Bucovina County. With the help of the information received from the staff employed on the farm and through the visual examination, assessments were made on the technology of raising dairy cattle, the hygiene and welfare conditions on the farm and on the animal feed. A
number of 4 feed samples were collected, representing all the feed used in the feed of these categories of dairy cows, both components and mixtures administered to animals. Sampling was done individually and was conditioned shortly after harvest by relative drying and grinding. The organoleptic examination was performed, the crude chemical
composition was determined, the mycotoxicological examination was performed and the aflatoxin and zearalenone content was determined. The results obtained indicated an adequate quality of the fodder from the organoleptic point of view and of the crude chemical composition. Following the mycotoxicological examination, it was found that the fodder was contaminated with aflatoxin B1 in all the samples examined, but no sample exceeded the maximum permitted values, and with regard to the zearalenone values in the samples we analyzed, we found that the values recorded in lucerne hay,
natural hay and concentrate for dairy cows were below the maximum limits imposed, instead the corn silo showed values that exceed twice the maximum values allowed by regulations for calves and dairy cows, respectively, we recorder a value of 1098,41 μg/kg
Some aspects regarding the storage of foodstuffs in food profile units
No full textFoods may undergo mechanical, chemical or microbiological changes in all stages of the food
chain, under the action of various factors.
This study follows how food is stored in a unit where food is marketed and in a unit where food
is prepared and served. During storage, foods undergo a number of phenomena and
transformations. These occur because the foodstuffs have a relative stability over time, influenced
by internal (structural) and external factors, which can modify their fundamental properties,
through processes of degradation, alteration, chemical or microbiological contamination,
impurities with foreign substances, etc.
The perishability of food can be determined by a variety of causes, including:
- breathing (in plant products);
- evaporation (meat and meat preparations, cheeses, soaps, etc.);
- volatilization (for alcoholic beverages);
- Fragmentation (in cheeses, flours, dehydrated vegetables and fruits, flours);
- the diffusion of water or fat through packaging (cheeses, fats, halva, etc.);
- mold (vegetable products, etc.);
- cutting at sales operations (cheeses, salami, etc.);
- agglomeration (ex: milk powder);
- breaking and spilling (liquid products packed in glass containers, eggs, etc.)
- impregnation (soaking) of certain types of packaging (eg textile bags) with products in
powdered state (flour, wheat, sugar, etc.).
Considering these, in any type of unit with food profile, special attention is paid to the way in
which food is stored, both raw materials and finished products.
The current research highlights how in two units with food profile the food is stored taking into
account the degree of food perishability
Botany and chemistry of Foeniculum vulgare var. Dulce mill. and Foeniculum vulgare var. Vulgare mill: A review
No full textThe Apiaceae family (Umbelliferae) comprises both vegetable and aromatic and medicinal species. Among the most
used aromatic species from this family is Foeniculum vulgare Mill, which can be cultivated in various climatic
conditions. Foeniculum vulgare ssp. vulgare Mill. can be cultivated using three varieties: Foeniculum vulgare var.
azoricum Mill., also called bulbing fennel or Florence fennel, Foeniculum vulgare var. dulce Mill. with the common
name of sweet fennel and Foeniculum vulgare var. vulgare Mill., this variety is known as bitter fennel due to the bitter
aroma of the seeds.In this review were presented the results of various publications, reported between 1961 and 2019,
on two varieties of fennel, var. dulce and var. vulgare. The publications were selected from the electronic
library.Therefor in this article, various botany and chemistry differences between sweet fennel and bitter fennel have
been presented
Cercetări privind valorificarea ca flori tăiate a speciei Celosia argentea var. cristata ‘Filemon’
Get PDFCelosia argentea var. cristata is an ornamental species that can be used as a cut flower in the dry state (immortelle). The ‘Filemon’ variety is also suitable for use in the form of a fresh cut flower. This paper presents the results of research on the use of this variety as a fresh cut flower and its behavior in various substances that can influence the shelf life of flowers. The experiments were organized in four variants: V1 - distilled water (control), V2 - boric acid, V3 - commercial preservative, V4 - acetyl salicylic acid. The substances used positively influenced the shelf life of fresh cut flowers, the best results being obtained in variant V3, followed by variant V4 and V2. These studies are part of the research project 14644/2018 UASMV Iaşi
Cercetări privind producerea de material săditor pe cale vegetativă la Taxus baccata L. în condiţiile judeţului Iaşi
Get PDFAmong the multitude of conifers found in green spaces is found the Taxus genus. The species of the genus Taxus are of particular importance in the arrangement of green spaces and especially in the conditions from us in the country which are generally favorable and very favorable for these species. The purpose of the paper is to highlight the potential for breeding through cuttings of the most known species, namely Taxus baccata L., which is found in Iasi county. Observations were made regarding the optimal timing for the cuttings, determining the influence of the culture substrate on the cuttings and establishing the rhizogenous substance Radistim 2 on the cuttings that were subjected to treatment