Spectroscopy of Chemically Linked Dimers:1,3-(1,1’-Dinaphthyl)propane in a Naphthalene Host

Results of absorption, fluorescence and selective-excitation experiments on the chemically linked dimer 1,3-(1,1'-dinaphthyl)propane in a naphthalene host at 1.8 K are presented. This system is shown to consist of two translationally inequivalent pairs of the naphthalene moiety, occupying non-substitutional sites in the host lattice. This gives rise to two sets of dimer absorptions, split by 40 and 97 cm -1

Investigation of the stability, radiation, and structure of laminar coflow diffusion flames of CH4/NH3 mixtures

The stability, radiation, and structure of laminar axisymmetric CH4/NH3/air diffusion flames have been studied using photographic images, spectrally resolved measurements of flame radiation, and the spatial distribution of temperature and major species mole fractions obtained by spontaneous Raman scattering. The fit procedure for the Raman spectra of NH3 includes a hitherto unquantified overtone feature, whose inclusion in the fit significantly improves the NH3 fraction obtained. Nitrogen is used to replace NH3 to separate chemical effects of NH3 addition from those due to dilution. The results show that NH3 addition drastically reduces radiation from carbon-containing species, with progressively increasing strong chemiluminescence from excited NO2 and NH2, indicating a substantial change in flame chemistry. While the Rayleigh/Mie scattering from soot particles is still observed in the Raman spectra at 28% NH3 addition, 46% NH3 in the fuel is seen to suppresses soot formation effectively. The measured axial and radial profiles of temperature and major species indicate a substantial contribution from radial transport from the reaction zone, seriously complicating the relation between composition, mixture fraction, and the corresponding equilibrium temperature and mole fractions

(Non)Equilibrium of OH and Differential Transport in MILD Combustion:Measured and Computed OH Fractions in a Laminar Methane/Nitrogen Jet in Hot Coflow

Spatial distributions of temperature, major species, and OH mole fractions under moderate or intense low-oxygen-dilution (MILD) conditions in a laminar-jet-in-hot-coflow configuration were measured using spontaneous Raman and laser-induced-fluorescence methods. A preheated mixture of 18% CH4/82% N2 at 1100 K was used as fuel, while the products of a laminar, flat, premixed burner-stabilized flame with an equivalence ratio of 0.8 at 1550 K were used as the oxidizer. For comparison, experiments replacing the fuel by pure N2 were also performed. The measurements are compared with the results of numerical simulations performed using the GRI-Mech 3.0 chemical mechanism and a multicomponent mixture-averaged transport model. Analysis of the data shows that the maximum axial and radial temperature and OH mole fraction occur on the lean side of the stoichiometric mixture fraction. MILD combustion generates maximum OH mole fractions of ∼700 ppm in the radial profiles close to the burner exit and ∼300 ppm along the centerline, more than five times lower than those measured in equivalent methane/air diffusion flames. Overall, good qualitative and quantitative agreement is found between the results of detailed computations and experiments, with the maximum differences observed in the axial OH profiles, which are just outside the estimated experimental uncertainty. Analysis of the computational results shows that differential diffusion hinders the use of the mixture fraction to estimate the equilibrium temperature and species fractions, causing an overestimation of the stoichiometric temperature by ∼200 K. Calculating the equilibrium quantities based on the local (computed) species fractions shows an axial temperature profile that differs from that experimentally/computationally determined by less than 25 K. The analysis further shows that the measured OH mole fractions are roughly three times higher than the (locally determined) equilibrium value

Ефективність застосування альфасорбу у годівлі поросят

Mycotoxins cause severe diseases in organisms of human and animals. They are difficult to diagnose, cause great economic damage. Sorbents are able to effectively bind and remove from the body through the digestive tract with a therapeutic or prophylactic purpose various endogenous and ekzogenous substances, microorganisms and they toxins, supermolecular structures and cells. The aim of the work is to study the effectiveness of use of Alfasorb for the neutralization of mixed fodders affected by mycotoxins and they impact on blood’s indexes and productive qualities of piglets of Large White Breed. Experience was conducted on 30 ty piglets. Animals of the control group received mixed feed that was produced in the conditions of the farm. The pigs of experimental group in addition to the basic diet received Alfasorb. We determined blood’s indexes for study the effect of feed additive Alfasorb on the physiological state of animals at 4 months of age. A morphological and histological study of liver was carried out. The analysis of the average daily weight gain of piglets showed that it was higher in period of growth in the animals of experimental group. In the animals of the experimental groups there was an increase in the number of red blood cells in comparison with the control. An unreliable decrease in blood serum levels which characterize the level of intermediate metabolism of proteins in the body (content of urea, creatinine and common bilirubin) was established in the animals of the experimental group as compared to the control group respectively by 22.83% ( td = 0.98, P ≤ 0.05), 7.12% (td = 1.92, P ≤ 0.05) and by 20.54% (td = 0.86, P ≤ 0.05). Most hepatocytes had large nucleus and intense color of the cytoplasm. This indicates the absence of alterative processes in the body. The results of the studies make it possible to assert that the inclusion the 0.2% Alfasorb to the compound of feed which contaminated with mycotoxins significantly reduces their negative effect on the piglets organism, has a positive effect on the growth rate, on the course of metabolic processes, also it promotes an increase in the liver of medium-sized hepatocyte nuclei, stimulates biosynthetic processes in that cells and ensures the formation of a full structure of histohematological barriers in the organism.Мікотоксини спричиняють різні захворювання в організмі людини та тварин. Вони важко діагностуються та призводять до великих економічних збитків. Сорбенти здатні ефективно зв’язувати та виводити з організму через травний тракт з профілактичною чи терапевтичною метою різні ендогенні та екзогенні субстанції, мікроорганізми та їх токсини, складні молекулярні структури та клітини. Мета роботи – дослідити ефективність застосування альфасорбу для нейтралізації комбікормів, уражених мікотоксинами, та їх вплив на показники крові та продуктивні якості поросят великої білої породи. Дослід проводили на 30-ти поросятах. Тварини контрольної групи отримували комбікорм, що виробляється в умовах ферми. Поросята дослідної групи у додаток до основного раціону одержували альфасорб. Ми вивчали показники крові для визначення впливу кормової добавки альфасорб та фізіологічний стан тварин 4-місячного віку. Було проведено морфологічне і гістологічне дослідження печінки. Аналіз середньодобових приростів поросят показав, що вони були більшими у період росту тварин експериментальної групи. У тварин дослідної групи була більшою кількість еритроцитів, у порівнянні з контролем. Встановлено зниження у сироватці крові тварин дослідної групи показників, що характеризують проміжний обмін (вміст сечовини, креатиніну та загального білірубіну), у порівнянні з контрольною групою відповідно 22,83% (td = 0,98, P ≤ 0,05), 7,12% (td = 1,92, P ≤ 0,05) and by 20,54% (td = 0,86, P ≤ 0,05). Більшість гепатоцитів мали великі ядра та інтенсивне забарвлення цитоплазми. Це вказує на відсутність альтеративних процесів в організмі. Результати досліджень дозволяють зробити висновок, що включення 0,2% альфасорбу до складу корму, контамінованого мікотоксинами, значно зменшує їх негативний вплив на організм поросят, позитивно впливає на прирости, перебіг метаболічних процесів, також сприяє, зниженню у печінці середніх розмірів ядер гепатоцитів, стимулює біосинтетичні процеси у цих клітинах та забезпечує формування повної структури гістогематологічних бар’єрів у організмі

Growth of Soot Volume Fraction and Aggregate Size in 1D Premixed C2H4/Air Flames Studied by Laser-Induced Incandescence and Angle-Dependent Light Scattering

The growth of soot volume fraction and aggregate size was studied in burner-stabilized premixed C2H4/air flames with equivalence ratios between 2.0 and 2.35 as function of height above the burner using laser-induced incandescence (LII) to measure soot volume fractions and angle-dependent light scattering (ADLS) to measure corresponding aggregate sizes. Flame temperatures were varied at fixed equivalence ratio by changing the exit velocity of the unburned gas mixture. Temperatures were measured using spontaneous Raman scattering in flames with equivalence ratios up to phi = 2.1, with results showing good correspondence (within 50 K) with temperatures calculated using the San Diego mechanism. Both the soot volume fraction and radius of gyration strongly increase in richer flames. Furthermore, both show a nonmonotonic dependence on flame temperature, with a maximum occurring at similar to 1675 K for the volume fraction and similar to 1700 K for the radius of gyration. The measurement results were compared with calculations using two different semiempirical two-equation models of soot formation. Numerical calculations using both mechanisms substantially overpredict the measured soot volume fractions, although the models do better in richer flames. The model accounting for particle coagulation overpredicts the measured radii of gyration substantially for all equivalence ratios, although the calculated values improve at phi = 2.35

A method for obtaining spectral characteristics of wood in the far infrared range of the spectrum

The article presents facts about the importance of knowing the spectral characteristics of biotechnological raw materials, as this will allow highly effi cient management of the technological processing process. The article describes the tools for obtaining interferograms of the object of study. The main instrument is the Fourier spectrometer infrared FSM 2201. An algorithm for conducting experiments to obtain spectral characteristics with selected laboratory equipment has been developed. Spectral characteristics in the far infrared range were obtained for oak, aspen, pine and birch wood species using the proposed method. Extremes in the range from 9400 nm to 9700 nm are of particular interest, since the absorption in this range is 100 %. The developed technique for obtaining spectral characteristics will allow the formation of reference data for the main types of wood, which will provide effective information and methodological support in the development of energy-saving dewatering modes, infrared technology for drying biotechnological raw materials.В статье приведены факты о важности знания спектральных характеристик биотехнологического сырья, так как это позволит высокоэффективно управлять технологическим процессом переработки. Приведено описание инструментария для получения интерферограмм объекта исследования, основным из которых является Фурье-спектрометр инфракрасный ФСМ 2201. На основе подборки лабораторного оборудования разработан алгоритм проведения экспериментов получения спектральных характеристик. Для пород древесины дуба, осины, сосны и березы по предлагаемой методике получены спектральные характеристики в дальней области ИК-спектра, наибольший интерес из которых представляют собой экстремумы в диапазоне от 9400 до 9700 нм, так как поглощение в данном диапазоне – 100 %. Разработанная методика получения спектральных характеристик позволит сформировать справочные данные для основных пород древесины, которые будут оказывать эффективную информационно-методическую поддержку при разработке энергосберегающих режимов обезвоживания, инфракрасной техники для сушки биотехнологического сырья

Hospital and outpatient clinic utilization among older people in the 3-5 years following the initiation of continuing care: a longitudinal cohort study

Background: Few studies have investigated the subsequent rate of hospital and outpatient clinic utilization in those who receive continuing care and have documented frequent usage over one year. Such knowledge may be helpful in identifying those who would benefit from preventive interventions. The aim of this study was to investigate and compare the subsequent rate of hospital and outpatient clinic utilization among older people with 0, 1, 2, 3 or more hospital stays in the first year following the initiation of continuing care. A further aim was to compare these groups regarding demographic data, health complaints, functional and cognitive ability, informal care and mortality. Methods: A total of 1079 people, aged 65 years or older, who received a decision regarding the initiation of continuing care during the years 2001, 2002 or 2003 were investigated. Four groups were created based on whether they had 0, 1, 2 or >= 3 hospital stays in the first year following the initiation of continuing care and were investigated regarding the rate of hospital and outpatient clinic utilization in the subsequent 3-5 years. Results: Fifty seven percent of the sample had no hospital stay during the first year following the initiation of continuing care, 20% had 1 stay, 10% had 2 stays and 13% had three or more hospital stays (range: 3-13). Those with >= 3 hospital stays in the first year continued to have the significantly highest rate of hospital and outpatient care utilization in the subsequent years. This group accounted for 57% of hospital stays in the first year, 27% in the second year and 18% in the third year. In this group the risk of having >= 3 hospital stays in the second year was 27% and 12% in the third year. Conclusions: There is a clear need for interventions targeted on prevention of frequent hospital and outpatient clinic utilization among those who are high users of hospital care in the first year after the initiation of continuing care. Perhaps an increased availability of medically skilled staff in the day to day care of these people in the municipalities could prevent frequent hospital and outpatient clinic utilization, especially hospital readmissions

Conflict of Interest in Clinical Practice Guideline Development: A Systematic Review

Background: There is an emerging literature on the existence and effect of industry relationships on physician and researcher behavior. Much less is known, however, about the effects of these relationships and other conflicts of interest (COI) on clinical practice guideline (CPG) development and recommendations. We performed a systematic review of the prevalence of COI and its effect on CPG recommendations. Methodology/Principal Findings: We searched Medline (1980 to March, 2011) for studies that examined the effect of COI on CPG development and/or recommendations. Data synthesis was qualitative. Twelve studies fulfilled inclusion criteria; 9 were conducted in the US. All studies reported on financial relationships of CPG authors with the pharmaceutical industry; 1 study also examined relationships with diagnostic testing and insurance companies. The majority of guidelines had authors with industry affiliations, including consultancies (authors with relationship, range 6–80%); research support (4–78%); equity/stock ownership (2–17%); or any COI (56–87%). Four studies reported multiple types of financial interactions for individual authors (number of types per author: range 2 to 10 or more). Data on the effect of COI on CPG recommendations were confined to case studies wherein authors with specific financial ties appeared to benefit from the related CPG recommendations. In a single study, few authors believed that their relationships influenced their recommendations. No studies reported on intellectual COI in CPGs