Primena mulitipnih inokulata u održivoj proizvodnji pšenice

The experiments were carried out three alternative varieties of wheat Tr. aestivum ssp. compactumima, Triticum spelt and Triticum durum three years of research with the application of organic fertilizers and microbial inoculum in order to maintain the biological value of the land. In the study determined the most important microbiological parameters changes in soil (total number of microbes and Azotobacter) and grain yield. At the end, it was concluded that wheat variety Tr.aestivum ssp. compactum has the best association with the rhizosphere population, and that the variety Triticum spelta has the highest grain yields under different agroecological conditions.U istraživanjima su korišćene tri alternativne sorte pšenice Tr. aestivum ssp. compactumima, Triticum spelta, i Triticum durum u tri godine istraživanja sa primenom organskog đubriva i mikrobiološkog inokulata u cilju održavanja biogenosti zemljišta. U toku istraživanja određivani su najznačajniji mikrobiološki parametri promena u zemljištu (ukupan broj mikroba i brojnost azotobaktera), kao i visina prinosa gajenih biljaka. Na kraju rada zaključeno je da sorta Tr.aestivum ssp. compactumima ima najbolju asocijaciju sa rizosfernom populacijom, a da sorta Triticum spelta ostvaruje najveće prinose u različitim agroekološkim uslovima

ODREĐIVANJE HEMIJSKOG SASTAVA RAZLIČITIH EKSTRAKATA ČUVARKUĆE

Sempervivum tectorum has a similar effect as aloe vera, which is known in the treatment of various skin diseases. This herb is considered one of the safest remedies for a wide range of skin diseases. Due to its anti-inflammatory and antiseptic properties, it also serves as an excellent first aid for burns, stings and bites, because it provides quick relief and calming. Freshly squeezed juice from the leaves of the houseplant is used in the treatment of nervous disorders, epilepsy and restless dreams. The leaves are edible and can be used as an addition to salads or stews. They are not particularly tasty, but as they are rich in water, they can be put in a juicer together with other fruits or vegetables and become a refreshing drink. It is used in folk herbal medicine and as a medicine. The aim of this study was to determine the moisture content, total extracted substances, extract density, vitamin C, organic acids and proteins in house extracts.Publishe

ISPITIVANJE EKSTRAKATA ORIGANA DOBIJENIH RAZLIČITIM METODAMA

Oregano is used in the production of specific aromatic cheeses, meat products and dough dishes, for the production of medicinal preparations, fragrant soaps, colognes and perfumes. Special interest in oregano in recent years is related to the results of a study of its biological activities, which indicate a wide range of antibacterial, fungicidal, antiviral and antioxidant properties. The subject of this paper is the examination of extracts of plant species of oregano (Origanum vulgare), with the aim of determining the method that is most popular for extracting this plant species and which gives the best yields of extracts. The content of extracted substances in each extract, the content of vitamin C as well as the content of organic acids were determined.Publishe

Finite element analysis of devitalized teeth

Elimination of a large part of dental tissues during root canal treatment affects the mechanical behavior of devitalized teeth. The present study addresses how much dentin removal affects changes in mechanical behaviors of the intact tooth and tooth with root canal treatment. In order to estimate the tooth weakening, we performed aн experimental assessment of critical force and numerical Finite Element Method (FEM) analysis with the intention to analyze stresses distributions. The results showed that root canal treatment had significant influence on stress distributions. By analysis of retrieved results, it is concluded that this study is an efficient framework which could be applied in a number of different cases, so that practitioners could analyze and prepare the treatment with more certainty.Publishe

Uticaj različitih varijanti đubrenja na kvantitet i kvalitet zrna pšenice

The research examined the effect of different ways of fertilization on the 1000 grain yield and protein content of wheat. For research was used wheat variety Pobeda. The experiment was set in two variants with and without diazotrophs. For both variants was performed before seeding fertilization and tilled complex NPK fertilizer in four levels with a ratio of nutrients 8:24:16 and variant Đ2 250 kg ha-1, Đ3-375 kg ha-1 and Đ4 500 kg ha-1. During supplemental feeding wheat entered the urea in an amount of Đ2-108 kg ha-1 Đ3-196 kg ha-1 Đ4-260 kg ha-1. Inoculation of seeds with a mixture of different types of diazotrophs (Azotobacter chroococcum, Azospirillum lipoferum, Pseudomonas fluorosciencs, Bacillus subtilis) was conducted before seeding. The same a mixture of diazotrophe was conducted with foliar treatment in the phase of tillering in an amount of tillering 5 l ha-1. At the end of the vegetation it has been established that the studied traits were increased in the variant with the application diazotrophs in all variants of fertilization. 1000 grain weight was increased by 5,54%. The highest 1000 grain weight was the variants Đ2 39,5 g. The height yield with inoculation was increased by 7.78%. There is a correlative relationship between nitrogen dose and the yield. The regression line shows the trend of rising yields, which was not in high correlation with large amounts of mineral nitrogen. The protein content was increased by 7.38%.U istraživanjima je ispitivan uticaj različitih načina đubrenja na masu 1000 zrna, visinu prinosa pšenice i sadržaj proteina. Za istraživanja se koristila pšenica sorte Pobeda. Ogled je postavljen u dve varijante sa i bez primene diazotrofa. Za obe varijante ogleda obavljeno je predsetveno đubrenje i zaorano kompleksno NPK mineralno đubrivo u četiri nivoa sa odnosom hraniva 8:24:16 i to za varijantu Đ2 250 kg ha-1, Đ3-375 kg ha-1 i Đ4 500 kg ha-1. Prilikom prihrane pšenice uneta je urea u količini Đ2-108 kg ha-1 Đ3-196 kg ha-1 Đ4-260 kg ha-1. Pred setvu je obavljena inokulacija semena sa smešom različitih vrsta diazotrofa Azotobacter chroococcum, Azospirillum lipoferum, Pseudomonas fluorosciencs, Bacillus subtilis. Istom smešom diazotrofa je obavljen folijarni tretman u fazi vlatanja u količini od 5 l ha-1. Na kraju vegetacije utvrđeno je da su ispitivane osobine bile povećane u varijanti sa primenom diazotrofa u svim varijantama đubrenja. Masa 1000 zrna bila povećana za 5,54%. Najveća masa 1000 zrna bila pri đubrenju Đ2 39,5 g. Visina prinosa pri inokulaciji bila je poveća za 7,78%. Postojala je korelativna zavisnost između količina primenjenog azota i visine prinosa, a linija regresije pokazuje trend rasta prinosa koji nije bio u visokoj korelaciji sa velikim količinama mineralnog azota. Sadržaj proteina bio je povećan za 7,38%

Uticaj međuredne kultivacije i vremena osnovne obrade zemljišta na prinos soje

Timely and correct application of agro technical measures in the production of soybean is a condition for obtaining high and stable yields, both in favorable years and in unfavorable years for production. The aim of this research is to examine the influence of interrelated cultivation and the time of basic soil treatment on soybean yield. One intermediate cultivation increases the yield by an average of 2.45%, by 2.08% for autumn cultivation and 2.82% for spring basic land cultivation. Two intercropping cultivars increase the average yield by 3.54%, by 2.59% for autumn harvesting and 4.49% for spring basic soil cultivation. Spring ground cultivation reduced the yield of 21.33%, and the decrease ranged from 6.45% in favorable year, to 36.21% in the unfavorable year for soybean production.Pravovremena i pravilna primena agrotehničkih mera u proizvodnji soje je uslov za dobijanje visokih i stabilnih prinosa, kako u povoljnim godinama, tako i u nepovoljnim godinama za proizvodnju. Cilj ovih istraživanja je sagledavanje uticaja međuredne kultivacije i vremena osnovne obrade zemljišta na prinos soje. Jedna međuredna kultivacija povećava prinos u proseku za 2,45% i to za 2,08% kod jesenje osnovne obrade i 2,82% kod prolećne osnovne obrade zemljišta. Dve međuredne kultivacije povećavaju prinos soje u proseku za 3,54% i to za 2,59% kod jesenje osnovne obrade i 4,49% kod prolećne osnovne obrade zemljišta. Prolećna osnovna obrada zemljišta smanjuje prinos 21,33%, a smanjenje se kretalo od 6,45% u povoljnoj godini, do 36,21% u nepovoljnoj godini za proizvodnju soje

Uticaj primene vodenih ekstrakata na prinos u organskoj proizvodnji soje

Biennial soya research was done in the surroundings of Bačka Topola. The field experiment was set by a replicate randomised complete block design. The goal was to determine the influence of aqueous plant extracts on soybean grain yield in an organic breeding system. A variance analasys was done and the central values between applied treatments were tested by a test of least significant differences. The applied treatment revealed a very significant influence. There were statistically significant differences between all variants. The yield was highest whilst a foliar application of a fermented nettle and common comfrey combination, which was performed in three repetitions that had time gaps of two weeks in between.Dvogodišnja istraživanja sa sojom, sprovedena su u okolini Bačke Topole. Poljski eksperimentalni ogled bio je postavljen po dizajnu slučajnog blok sistema. Cilj je bio da se utvrdi uticaj vodenih biljnih ekstarkata na prinos zrna soje u organskom sistemu gajenja. Urađena je analiza varijanse, a srednje vrednosti između primenjenih tretmana testirane su testom najmanje značajnih razlika. Primenjeni tretman ispoljio je statistički vrlo značajan uticaj. Između svih varijanti postojale su statistički zanačajne razlike. Najviši prinos ostvaren je kod folijarno primenjene kombinacija fermentisane korive i gaveza u tri navrata sa po dve nedelje razmaka između primena

Trauma of the frontal region is influenced by the volume of frontal sinuses. A finite element study

Anatomy of frontal sinuses varies individually, from differences in volume and shape to a rare case when the sinuses are absent. However, there are scarce data related to influence of these variations on impact generated fracture pattern. Therefore, the aim of this study was to analyse the influence of frontal sinus volume on the stress distribution and fracture pattern in the frontal region. The study included four representative Finite Element models of the skull. Reference model was built on the basis of computed tomography scans of a human head with normally developed frontal sinuses. By modifying the reference model, three additional models were generated: a model without sinuses, with hypoplasic, and with hyperplasic sinuses. A 7.7 kN force was applied perpendicularly to the forehead of each model, in order to simulate a frontal impact. The results demonstrated that the distribution of impact stress in frontal region depends on the frontal sinus volume. The anterior sinus wall showed the highest fragility in case with hyperplasic sinuses, whereas posterior wall/inner plate showed more fragility in cases with hypoplasic and undeveloped sinuses. Well-developed frontal sinuses might, through absorption of the impact energy by anterior wall, protect the posterior wall and intracranial contents.This work was supported in part by grants from the Serbian Ministry of Education, Science and Technological Development III45005, III41007, ON174028 and EU project FP7 ICT SIFEM 600933

Kinematics of gait:new method for angle estimation based on accelerometers

A new method for estimation of angles of leg segments and joints, which uses accelerometer arrays attached to body segments, is described. An array consists of two accelerometers mounted on a rigid rod. The absolute angle of each body segment was determined by band pass filtering of the differences between signals from parallel axes from two accelerometers mounted on the same rod. Joint angles were evaluated by subtracting absolute angles of the neighboring segments. This method eliminates the need for double integration as well as the drift typical for double integration. The efficiency of the algorithm is illustrated by experimental results involving healthy subjects who walked on a treadmill at various speeds, ranging between 0.15 m/s and 2.0 m/s. The validation was performed by comparing the estimated joint angles with the joint angles measured with flexible goniometers. The discrepancies were assessed by the differences between the two sets of data (obtained to be below 6 degrees) and by the Pearson correlation coefficient (greater than 0.97 for the knee angle and greater than 0.85 for the ankle angle)