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Functional model for determining the optimal duration of use of fixed assets
No full textThe purpose of this paper was to present a functional model for determining the duration of use of fixed assets based on
the relationship between the average fixed cost of depreciation of the fixed medium and the opportunity cost determined
by the market of the respective product. The objectives of the paper included: 1. determining the correlation between
the duration of use, the total distance travelled and the price of fixed assets; 2. determining the optimal duration of use
of the fixed assets based on the relationship between the average fixed cost and the opportunity cost. In order to
determine the optimal duration of use, the minimum marginal cost of depreciation was calculated as the ratio of the
difference between the prices between moments n and n + 1 and the length or kilometres travelled in the range n and n +
1. Also, the marginal opportunity cost for the remaining transport capacity to be used was determined starting from the
hypothesis that the market assigns a price to a usable capacity and to a capacity too old to be used, the price is nil. As a
result, we identified the average price for the maximum duration or distance of use. The marginal opportunity cost was
determined as the ratio between the price at one point and the remaining difference to be used by kilometres or old. The
remaining difference to be used was calculated as the difference between the maximum duration that can be used and
the time at time i or the maximum distance travelled and the distance travelled at price i. The average cost with the
depreciation of the fixed means analysed is determined by the distance travelled and its age. The proposed model allows
to determine an optimal duration of use of the fixed means according to their age and the transport distance. This model
can be easily adapted to other types of fixed assets and the quality of the results is given by the existence of a significant
number of data on their selling prices
Study regarding the regenerative response after induced anemia through blood collection in mouse
No full textOrdinarily, animals can tolerate a loss of about 20 to 30% of the total quantity of blood without the need for transfusions or fluid therapy. Regarding mice, it is generally accepted that blood samples should be limited to 10 – 15% of total blood mass, in order to prevent the onset of anemia. For this experiment we have shown the hematological differences between the collection of 25% and 40% of total estimated blood volume. In both cases, complete blood counts were analyzed and erythropoietic response was described by means of bone marrow and spleen cytology analysis. After approximately 24 hours, both groups had increased reticulocyte counts and low hemoglobin levels. Red blood cell morphology was not altered with the exception of anisocytosis due to polychromasia
Heat requirement of pomegranate fruit: a case study on Shishe-Kab cultivar
No full textThe aim of this study was to determine growing degree day (GDD) for pomegranate fruit Shishe-Kab cultivar and study the phonological stages of fruit from bloom to harvest. A completely randomized block design was carried out on the research orchard of the Faculty of Agriculture, University of Birjand, 2017. During the May to October, the diameter and length of the fruits and calyx were recorded using the non-destructive
method by a digital caliper on the tree. Next fruit samples were randomly taken from the trees to determine fresh and dry weight. Furthermore, by using the metrological data, the thermal requirement based on the growth degree day (GDD) has been determined from
April until harvest day. The effective heat requirement for Shishe-Kab cultivar that was calculated from blooming to reach maturity was 2560.95. The highest cumulative temperature was recorded in the commercial harvest date. By receiving this degree day, fruit reached the highest fresh and dry weight, length and also diameter at the end of growing season. The results indicated that all fruit characteristics significantly increased
from the first recording day till the end, except the ratio of fruit length to diameter.
A slight decrease in growth rate was presented in fruit diameter and length, which was concomitant with their seed hardening. Results showed that calyx diameter and length of pomegranate fruit has a slow continues liner growth pattern, fruit length and diameter exhibited a double sigmoid growth curve, while the fresh and dry weight followed a single
sigmoidal curve. By determining the fruit growth pattern under climatic conditions, it is possible to determine the length of growing season and the critical stages of growth for proper management in the garden
Gross and microscopical aspects in some vascular tumors in dogs (retrospective study 2007-2019)
No full textThe study was done on six dogs selected from the cadavers brought for necropsy at the Pathological Anatomy and Forensic Medicine Service, from the Faculty of Veterinary Medicine of Iași, between 2007 and 2019. The dogs had ages that ranged from 7 to 13 years, were of different breeds (3 mixed breeds, 11 Amstaff, 2 Caniche) and during the necropsic exam showed macroscopical changes of the internal organs that suggested the presence of vascular tumors. The formations that we observed were nodular in shape, of different sizes, blackish-red in color, with harder consistency than the host tissues and expressed dark red blood on the cut surface. The location of these tumors differed from one case to another, being either restricted to the liver, or disseminated in the heart (right atrium), spleen, lungs, kidneys, intestine, mesenteries, omentum and central nervous tissue. The histopathological exam showed that these structures had a trabecular pattern, with either blood filled caverns of various sizes, or numerous capillaries, of different calibers, filled or not with red blood cells. The cells that lined these structures had similar characteristics with endothelial cells, being spindle shaped, sometimes with a tendency towards a circular arrangement. The anatomo-pathological diagnostic was that of vascular tumor, with a benign or malignant character, depending on the degree of cellular proliferation and mitotic index
Morpho-topographic researches on cervico-cephalic lymphcentres at ferret
No full textThe muscular lymph centers from the cervico-cephalic region emerge with the muscles and in specialty literature there is little information regarding muscles at the ferret, hence why in this study we have also referred to this morphological segment. In the cephalic region, the skin muscles existing at the ferret do not present significant differences to those existing in domestic carnivores, but the masticatory muscles have some peculiarities. The temporal muscle, masseter muscle and digastric muscle are highly developed. On the surface of the masseter muscle is identified a lymphonodular group covered by the skin muscle and tegument. Due to topography, it was considered that this lymphonodular group represents the parotid lymph center, although some authors do not even mention the presence of this lymph center in the ferret. At the ventral edge of the parotid gland and at the mandibular cranio-dorsal edge there is a mandibular lymph center formed by two lymphonodular structures. The retropharyngeal lymph center is represented by a single lymph node. In the cervical region the superficial cervical lymph center was identified, formed by a single structure. Although in speciality literature the presence of the profound cervical lymph center is not signalled, the structure was identified in two from the total of four corpses used
Estimation of laparotomic incision lengh in corelation with uterine size
Get PDFThe objective of this article is to find a way to estimate the lengh of the laparotomic incision after the size of the organ that needs to be removed was measured using an ultrasound machine. Incision size is a very important aspect in post-surgery recovery. A small incision leads to a faster recovery, reduces the risc of post-surgery infections, it leads to less pain for the animal and a lesser inflamatory response. An incision made at first too small needs to be lengthened until it gets to the proppers size and that means extending the time of surgery, producing unnecesary trauma by makeing multiple cuts and increasing the risk of error. We used a total of 25 queens and 18 bitches for this study. We performed an ultrasound exam on each animal and determened the size of the uterine horns and ovaries. Than we used the area of the largest section to estimate the lengh of the incision
Colostrum management practices in some Romanian dairy farms
Get PDFWhen calves are born they have no innate immunity so consumption of an adequate volume of high-quality colostrum in the firs hours of life is vital to a dairy calf’s ability to survive and become a productive herd member. Colostrum handing and feeding are essential management protocols for dairy producers. The aims of this study were to investigate current colostrum management practices in Romanian dairy farms using a questionnaire-based that was sent to 30 dairy veterinarians from all over the country between March and June 2019. The questionnaire objective was to describe colostrum management practices carried out in Romanian dairy farms and to identify weaknesses in these areas that may affect calf health and welfare by comparing the results with the current industry recommendations. The way colostrum is managed and fed to calves has changed a lot in recent years in Romania. More operations are removing calves from their dams immediately after birth (83,3%), which decreases the risk of direct disease transmission. Colostrum quality is being evaluated on a higher percentage of operations (63,3%), but the passive transfer of immunoglobulins into the blood of cattle is still tested in a few cases (26,7%). Knowing all these current colostrum practices on our dairy farms help us to identify the possible mistakes that are made and to find solutions to improve the management of colostrum and reducing the morbidity and mortality rates of newborn calves
Soluţii ecologice privind monitorizarea poluării atmosferice urbane cu ajutorul arborilor bioindicatori pe aliniamentele stradale principale din municipiul Iaşi
No full textRecent data underline that the evolution of the urban environment in Iaşi was mostly based ondeveloping the street system infrastructurein detriment of the urban green areas, what ledinevitablyto the intensification of traffic and holding back the interest for developing in a sustainable mode a network ofurban green areas.In many European countries a program of monitoringinvolving bioindicating trees is already implemented, based on the response of these ”sentinel trees” to harsher life conditions of the intensetraffic and poluted streets compared to the rest of the green areas.The present study aims the importance of dendrological street plantations through their positive impact on the fight against direct pollution toward the pedestrian traffic.The observations were conducted in alignmentsplantations from three main boulevards in Iaşi, underlining the insufficiencyof woody vegetation, the precarious health state of most of the mature specimens, caused by improperly branch cutting, discontinuity of the greenvegetation lines or the lack of them. The paper will propose solutions and landscaping measures meant to improve the quality and safety of the pedestrian traffic along the considered boulevards
Assesment of the integration mode of the sustainable development in European rural area and North-Est region
No full textWithin the rural development, the agriculture of Romania holds an important weight, detaching itself by the contribution to the realization of the gross domestic product, as well as by about 29% of the employed population, returning 0.43 ha / inhabitant, compared to 0.21 ha / inhabitant in European Union. This explains why agriculture is a very attractive and profitable branch. In this context, the strategy of sustainable rural development and the increase of the performance and the competitiveness of the agricultural production at national, regional or local level, must start from the economic-financial analysis of the situation of the agricultural sector, according to which to proceed to the adoption of those measures that lead, firstly, to the increase of agricultural production and, secondly, to its efficiency by attracting European funds. The paper aims to identify the way of approaching sustainable development within the regional development strategies, having as a case study the North-East Region, and to evaluate the implementation of the strategic objectives, at regional level and in the rural environment. The main objectives come to meet the goal set by: the conceptual delimitation of sustainable development in a global, European and national context; assessing the dimension of the sustainable development phenomenon at global, European and national level; assessing the inter-correlation between the regional strategic objectives and the sustainable development objectives for the North-East Region (2007-2013 and 2014-2020); the projection of the evolution of the result indicators of the regional strategy for the period 2007-2020 (with target indicators for 2022), which highlights the contribution to ensuring regional and rural sustainable development, compared to the evolutionary trend from 2000-2013 and 2014-2020; identifying strategic proposals for ensuring regional and rural sustainable development
Evaluation of the therapeutic potential of some apicultural products with essential oils for cutaneous wounds in cats and dogs
No full textHoney represents a valuable product, which has been widely used for its therapeutic benefits in various disease conditions. Moreover, honeydew honey has been scientifically recognised for its antioxidant, anti- microbial and wound healing properties and it is used clinically, as a topical treatment for wound infections. In addition to this, a plethora of studies have revealed that propolis, sea buckthorn essential oil and thyme essential oil are basic aids in the treatment of wounds and other skin conditions. The aim of the present research was to determine the clinical effectiveness of two natural dressings, based on honeydew honey, combined either with soft propolis extract and thyme essential oil, either with sea buckthorn essential oil, with the purpose of minimizing the antibioresistance phenomenon within the small animal clinics. Their therapeutic value has been evaluated in feline and canine distinct types of cutaneous wounds, by topical application. The honeydew honey, soft propolis extract and sea buckthorn essential oil were provided by "Apilife Sibiu" company, located in Romania, while the thyme essential oil was purchased from "Young Living" company. The products were applied on uncomplicated acute and complicated cutaneous wounds in dogs and cats. In the treatment of six patients with uncomplicated acute wounds, we found an inceased efficacy of the dressing containing honeydew honey and sea buckthorn essential oil, while in the treatment of six patients with complicated cutaneous wounds, the dressing based on honeydew honey, soft propolis extract and thyme essential oil has proven to be highly effective. All in all, based on the results obtained in conjunction with other studies in the field, we recommend the implementation of apicultural products with addition of essential oils in the prevention and therapy of various forms of cutaneous wounds in animals