Steering effects on growth instability during step-flow growth of Cu on Cu(1,1,17)

Kinetic Monte Carlo simulation in conjunction with molecular dynamics simulation is utilized to study the effect of the steered deposition on the growth of Cu on Cu(1,1,17). It is found that the deposition flux becomes inhomogeneous in step train direction and the inhomogeneity depends on the deposition angle, when the deposition is made along that direction. Steering effect is found to always increase the growth instability, with respect to the case of homogeneous deposition. Further, the growth instability depends on the deposition angle and direction, showing minimum at a certain deposition angle off-normal to (001) terrace, and shows a strong correlation with the inhomogeneous deposition flux. The increase of the growth instability is ascribed to the strengthened step Erlich Schwoebel barrier effects that is caused by the enhanced deposition flux near descending step edge due to the steering effect.Comment: 5 page

Stimulated wave of polarization in spin chains

Stimulated wave of polarization, triggered by a flip of a single spin, presents a simple model of quantum amplification. Previously, it has been found that such wave can be excited in a 1D Ising chain with nearest-neighbor interactions, irradiated by a weak resonant transverse field. Here we explore models with more realistic Hamiltonians, in particular, with natural dipole-dipole interactions. Results of simulations for 1D spin chains and rings with up to nine spins are presented.Comment: 15 pages, 5 figure

One loop renormalization for the axial Ward-Takahashi identity in Domain-wall QCD

We calculate one-loop correction to the axial Ward-Takahashi identity given by Furman and Shamir in domain-wall QCD. It is shown perturbatively that the renormalized axial Ward-Takahashi identity is satisfied without fine tuning and the ``conserved'' axial current receives no renormalization, giving $Z_A=1$. This fact will simplify the calculation of the pion decay constant in numerical simulations since the decay constant defined by this current needs no lattice renormalization factor.Comment: 16 pages, 3 axodraw.sty figure

Biochemical indicators, quality and safety of domestic and wild pig slaughter products

Animal husbandry is one of the important branches of agricultural production, which plays an important role in the formation of food security of Ukraine and providing the population with important types of food. The correct methodical approach to the inspection of organs and tissues of slaughtered animals allows to avoid errors in the diagnosis of various diseases, in the sanitary assessment of slaughter products, to prevent meat losses and the release of food products that are dangerous for humans. Analyzing the requirements of the modern market and the priority directions for the development of trade relations between the countries of the European Union for our country, it should be noted that the responsibility for the export and import of products of animal origin and the control of the production of high-quality and safe products is entrusted to the specialist of the state veterinary service. Organoleptic analysis of slaughter products is an important component of inspection. In addition, it should be noted that determining the degree of freshness of meat for a long time was carried out only with the help of the organoleptic method. It has been proven that organoleptic indicators provide comprehensive information for determining the good quality of meat. The quality of meat or its nutritional value refers to the chemical composition of the fleshy part, which includes muscle, fat and connective tissue. The chemical composition, energy value, digestibility, taste, culinary and other properties of meat depend on the ratio of these tissues. The quality of meat is influenced by the breed of animals, sex, age, fatness, the nature of fattening, conditions of transportation and pre-slaughter aging, methods of stunning, degree of exsanguination, etc. The article presents materials related to the inspection of animal slaughter products in the Zhytomyr region (agro-food market in the city of Olevsk). The study was carried out as part of the research work of the department of normal and pathological morphology, hygiene and expertise “Monitoring the content of toxic substances in drinking water, feed and their impact on the body of cattle and the quality and safety of products”, state registration number – 0120U101318. The purpose of the study is to inspect the slaughter products of domestic and wild pigs in the agro-food market of the Zhytomyr region. The task of the work was to determine the organoleptic, physico-chemical and microbiological indicators of slaughter products of domestic and wild pigs. The testing laboratory of veterinary and sanitary examination in the market carries out significant work on the inspection of animal slaughter products, which ensures the release of good-quality products for the population. As a result of the inspection of the slaughter products of domestic and wild pigs, it was established that all meat samples according to organoleptic parameters corresponded to the parameters of fresh high-quality meat, the reaction to peroxidase was positive, the pH of the meat ranged from 5.9 to 6.1. No trichinella was detected during trichinoscopy of pork samples. Veterinary and sanitary examination of livestock products on the markets is carried out only by veterinary medicine specialists of state laboratories or other state institutions of veterinary medicine. The laboratory carries out mandatory quality and safety control of all controlled products sold, including food products of animal origin intended for human consumption. In this regard, it is important to carry out inspection, sanitary evaluation of slaughter products of slaughter animals and determination of morphological characteristics of meat of domestic and wild pigs

Study of the activity of sunflower honey against a mixed microbial association isolated from bees with signs of dyspepsia in laboratory conditions

Beekeeping is one of the essential branches of agriculture in Ukraine, the main activity of which is aimed at breeding bees and obtaining honey and other products beneficial for human health. Maintaining the physiological state of bee colonies at the proper level is one of the essential tasks of veterinary medicine doctors and beekeepers. Compliance with veterinary and sanitary requirements at bee farms is the basis of preventing infectious pathologies in bee colonies. Since the body of insects has a fast metabolism, any infectious pathology quickly acquires a massive manifestation. One indicative symptom of infectious damage to the “gut” of bees is dyspepsia. Diarrhea, anorexia, and loss of productivity are observed in bees in this condition. The market of means to prevent such pathological manifestations in beekeeping is relatively narrow. The healing and favorable properties of honey, manifested in pain-relieving, antimicrobial and anti-inflammatory effects, have been known since ancient times. Sunflower honey differs from other types in a wide range of components, particularly phytoncides, which inhibit the growth of pathogenic microorganisms. Therefore, the main goal of the experiment was a laboratory study of the effect of different concentrations of sunflower honey sieve on the mixed microbial association isolated from bees with signs of dyspepsia. The activity of sunflower honey in laboratory conditions was studied by the disco-diffusion method in Petri dishes on MPA medium (meat-peptone agar). To obtain syrup from sunflower honey, sunflower honey was diluted with distilled water in a ratio of 1:1, working solutions were prepared from sunflower honey syrup in dilutions of 1:2, 1:4, 1:10, 1:100. The data analysis indicates the bacteriostatic activity of the syrup from sunflower honey in all studied concentrations concerning the mixed microbial association. Moreover, the largest diameter of the growth inhibition zone of the studied microorganisms was noted when the syrup from sunflower honey was diluted in a ratio of 1:10 (19.2 ± 0.42 mm). In turn, the antagonistic effect of the syrup from sunflower honey was observed in all dilutions concerning the mixed microbial association, where the largest diameter of the antagonism was 19.6 ± 0.27 mm when the disc was impregnated with the native working solution. Thus, it is promising to accumulate and identify a pure culture antagonist concerning a mixed culture of bacteria isolated during bee diarrhea to further create a pharmacological agent for preventing infectious pathologies of bees in unhealthy apiaries

ОСОБЛИВОСТІ СІЛЬСЬКОГОСПОДАРСЬКОГО ВИКОРИСТАННЯ ДЕРНОВО-КАРБОНАТНИХ ҐРУНТІВ (РЕНДЗИН) ВОЛИНСЬКОГО ПОЛІССЯ

The features of sod-carbonate soils (rendzin) and their contiguity to Upper Cretaceous deposits within the boundaries of the Volyn Polissia are considered. The research was conducted in two areas and similar results were obtained. The term "rendziny" is briefly explained and their genesis, soil profile morphology, humus reserves, processes of humus formation and dehumification are defined. The most lasting effect of humus accumulation is noted when organic fertilizers are applied. This indicates that the use of organic and organo-mineral fertilizer systems leads to the stabilization of humus accumulation in the arable layer of the humus horizon.To maintain a high level of humus formation, it is necessary to apply organic fertilizers, and for a high degree of enrichment of humus with nitrogen, it is necessary to supplement them with mineral fertilizers. Of all the applied fertilization systems, the most optimal is the organo-mineral (combined) system (N60P60K120+8.9 t/ha of manure), which contributes to the formation of a powerful humus horizon characterized by the highest thermodynamic stability of the humus complex.The transformation of colloidal forms of humus was noted. When plowing rendzin on control (without fertilizers), the content of GH in the plowed layer decreases by 2 times, which indicates increased mineralization due to plowing. The use of fertilizer systems makes it possible to restrain PG mineralization by 16–40%, and the organo-mineral system exerts a great influence on its stabilization.     Розглянуто особливості дерново-карбонатних ґрунтів (рендзин), їхню приуроченість до верхньокрейдових відкладень у межах Волинського Полісся. Дослідження проведено на двох площах та отримано аналогічні результати. Коротко пояснено термін «рендзини» і визначено їх генезу, морфологію грунтового профілю, запаси гумусу, процеси утворення гумусу та дегуміфікації. Найбільш тривалим ефект накопичення гумусу відзначається при внесенні органічних добрив. Це свідчить про те, що застосування органічної та органо-мінеральної системи добрива призводить до стабілізації накопичення гумусу в орному шарі гумусового горизонту.Для підтримки високого рівня утворення гумусу необхідно обов'язково вносити органічні добрива, а для високого ступеня збагачення гумусу азотом необхідно доповнювати їх мінеральними добривами. З усіх застосовуваних систем удобрення найбільш оптимальною є органо-мінеральна (комбінована) система (N60P60K120+8,9 т/га гною), яка сприяє утворенню потужного гумусового горизонту, що характеризується найвищою термодинамічною стійкістю гумусового комплексу.Відзначено трансформацію колоїдних форм гумусу. При розорюванні рендзин на контролі (без добрив) вміст ПГ у орному шарі зменшується у 2 рази, що свідчить про підвищену мінералізацію внаслідок розорювання. Застосування систем добрива дозволяє стримувати мінералізацію ПГ на 16–40%, причому великий вплив на його стабілізацію чинить органо-мінеральна система

Novel synovial fluid recovery method allows for quantification of a marker of arthritis in mice

SummaryObjectiveWe evaluated three methodologies – a calcium sodium alginate compound (CSAC), polyacrylate beads (PABs), and Whatman paper recovery (WPR) – for the ability to recover synovial fluid (SF) from mouse knees in a manner that facilitated biochemical marker analysis.MethodsPilot testing of each of these recovery vehicles was conducted using small volumes of waste human SF. CSAC emerged as the method of choice, and was used to recover and quantify SF from the knees of C57BL/6 mice (n=12), six of which were given left knee articular fractures. SF concentrations of cartilage oligomeric matrix protein (COMP) were measured by enzyme-linked immunosorbent assay.ResultsThe mean concentration ratio [(COMPleft knee)/(COMPright knee)] was higher in the mice subjected to articular fracture when compared to the non-fracture mice (P=0.026). The mean total COMP ratio (taking into account the quantitative recovery of SF) best discriminated between fracture and non-fracture knees (P=0.004).ConclusionsOur results provide the first direct evidence of accelerated joint tissue turnover in a mouse model responding to acute joint injury. These data strongly suggest that mouse SF recovery is feasible and that biomarker analysis of collected SF samples can augment traditional histological analyses in mouse models of arthritis

The multiple quantum NMR dynamics in systems of equivalent spins with the dipolar ordered initial state

The multiple quantum (MQ) NMR dynamics in the system of equivalent spins with the dipolar ordered initial state is considered. The high symmetry of the MQ Hamiltonian is used in order to develop the analytical and numerical methods for an investigation of the MQ NMR dynamics in the systems consisting of hundreds of spins from "the first principles". We obtain the dependence of the intensities of the MQ NMR coherences on their orders (profiles of the MQ NMR coherences) for the systems of $200 - 600$ spins. It is shown that these profiles may be well approximated by the exponential distribution functions. We also compare the MQ NMR dynamics in the systems of equivalent spins having two different initial states, namely the dipolar ordered state and the thermal equilibrium state in the strong external magnetic field.Comment: 11 pages 4 figure

Entanglement in nuclear quadrupole resonance

Entangled quantum states are an important element of quantum information techniques. We determine the requirements for states of quadrupolar nuclei with spins >1/2 to be entangled. It was shown that entanglement is achieved at low temperature by applying a magnetic field to a quadrupolar nuclei possess quadrupole moments, which interacts with the electricfield gradient produced by the charge distribution in their surroundings.Comment: 9 pages, 5 figure