Miracle-dz/UniFAR-FTUs huggingface dataset:
Effective double-ended chelating agents: crystal structures of N,N,N′,N′-tetraacetyl diamino derivatives and their chelates

Crystal structure determinations of six N,N,N′,N′-tetraacetyl diamino derivatives, N,N,N′,N′-tetraacetyl m-xylylenediamine 1, N,N,N′,N′-tetraacetyl p-xylylenediamine 2, N,N,N′,N′-tetraacetyl 1,5-diaminonaphthalene 3, N,N,N′,N′-tetraacetyl 1,4-diaminocyclohexane 4, N,N,N′,N′-tetraacetyl 1,4-diaminobutane 5 and N,N,N′,N′-tetraacetyl 1,8-diaminooctane 6 have been carried out. In all these compounds the anti–syn configuration, in each DAA group, is preferred and the two DAA groups, at each end of the extended ligand, are coplanar with respect to one another. Further, the syntheses and crystal structures of two metal complexes [Cu(N,N,N′,N′-tetraacetyl 1,4-diaminobutane)2(H2O)2](ClO4)25a and [Zn(N,N,N′,N′-tetraacetyl 1,6-diaminohexane)2(H2O)2](ClO4)27 are also reported. Single crystal analysis confirmed that the N,N,N′,N′-tetraacetyl diamino derivatives act as bis-chelating, double-ended ligands. In an unbound state all the tetraacetyl derivatives adopt the expected anti–syn configuration but on complex formation this configuration of the ligand changes to anti–anti resulting in the formation of chelate complexes.
INVARIANT PROPERTIES OF ABSORPTION PROFILES IN SPORANGIOPHORES OF Phycomyces blakesleeanus UNDER BALANCING BILATERAL ILLUMINATION

Abstract— Absorption spectra and spectra of the refractive indices were separately measured for cytoplasm and vacuole of Phycomyces blakesleeanus in the wavelengths domains 300 to 750 nm and 250 to 750 nm respectively. These data were then used to simulate absorption profiles for different orientations of the photoreceptor for measured action spectra for phototropic balance. The photoreceptor was assumed to be a flavin. Using the reference wavelengths 394, 450 and 507 nm as an example it is shown that the absorption profiles have, independent of the photoreceptor orientation, invariant properties. Under bilateral balancing illumination the symmetry of the absorption profiles is conserved and the total amount of energy absorbed at proximal and distal sides is an invariant under a symmetry transformation front to the rear side.
DETERMINATION OF ACTIVE INGREDIENTS OF PHYLLANTHUS URINARIA BY CAPILLARY ELECTROPHORESIS WITH AMPEROMETRIC DETECTION

A method based on capillary electrophoresis with amperometric detection was developed for the separation and determination of rutin, quercetin, ferulic acid, caffeic acid, and gallic acid in Phyllanthus urinaria. The effects of the acidity and the concentration of the running buffer, separation voltage, injection time, and detection potential were investigated to acquire the optimum conditions. The detection electrode was a 90-µm diameter platinum microelectrode at a detection potential of +1.00 V (versus Ag/AgCl). The five analytes could be well separated within 27 min in a 50 cm length fused-silica capillary at a separation voltage of 15 kV in a 10 mmol/l borate buffer (pH 9.0). The response was linear over about three orders of magnitude with detection limits (S/N = 3) ranging from 0.4 µM to 5.9 µM for all the analytes. The proposed method was successfully applied to the analysis of active ingredients in Phyllanthus urinaria with satisfactory assay results.
Enhanced convective and film boiling heat transfer by surface gas injection

Heat transfer measurements were made for stable film boiling of water over a horizontal, flat stainless steel plate from the minimum film boiling point temperature, T{sub SURFACE} {approximately}500K, to T{sub SURFACE} {approximately}950K. The pressure at the plate was approximately 1 atmosphere and the temperature of the water pool was maintained at saturation. The data were compared to the Berenson film-boiling model, which was developed for minimum film-boiling-point conditions. The model accurately represented the data near the minimum film-boiling point and at the highest temperatures measured, as long it was corrected for the heat transferred by radiation. On the average, the experimental data lay within {plus_minus}7% of the model. Measurements of heat transfer were made without film boiling for nitrogen jetting into an overlying pool of water from nine 1-mm- diameter holes, drilled in the heat transfer plate. The heat flux was maintained constant at approximately 26.4 kW/m{sup 2}. For water-pool heights of less than 6cm the heat transfer coefficient deceased linearly with a decrease in heights. Above 6cm the heat transfer coefficient was unaffected. For the entire range of gas velocities measured [0 to 8.5 cm/s], the magnitude of the magnitude of the heat transfer coefficient only changed by approximatelymore » 20%. The heat transfer data bound the Konsetov model for turbulent pool heat transfer which was developed for vertical heat transfer surfaces. This agreement suggests that surface orientation may not be important when the gas jets do not locally affect the surface heat transfer. Finally, a database was developed for heat transfer from the plate with both film boiling and gas jetting occurring simultaneously, in a pool of water maintained at its saturation temperature. The effect of passing nitrogen through established film boiling is to increase the heat transfer from that surface. 60 refs.« less
Youths’ coping with cyberhate: Roles of parental mediation and family support

Adolescents around the world are increasingly exposed to cyberhate. More knowledge is needed to understand how adolescents cope with cyberhate and how they can be supported when exposed. To this end, the present study investigated the associations between parental mediation of Internet use and adolescents’ problem-focused coping strategies for hypothetical cyberhate victimization while considering family support as a moderator of these relationships. The sample consisted of self-reports of 5,960 adolescents between 12-18 years old (M=14.94; SD=1.61; females: 50.7%) from Cyprus, Germany, Greece, India, Spain, South Korea, and Thailand. A structural equation model was used to investigate the relationship among parental mediation, family support, and coping with cyberhate. Findings showed a positive relationship between instructive parental mediation and adolescents’ problem-focused coping strategies, and a negative relationship between restrictive parental mediation and adolescents’ capability to cope productively with cyberhate. In addition, family support strengthened the positive relationship between instructive parental mediation and adolescents’ use of coping strategies and attenuated the negative relationship between restrictive parental mediation and adolescents’ use of coping strategies. The findings highlight the need for parental education training and underscore the importance of family support for increasing adolescents’ ability to cope productively with cyberhate. Adolescentes de todo el mundo están cada vez más expuestos al ciberodio. Se necesita más conocimiento para comprender cómo los y las adolescentes afrontan estas experiencias. El presente estudio investigó la relación entre la mediación parental en el uso de Internet y las estrategias de afrontamiento entre adolescentes centradas en el problema en una hipotética victimización en ciberodio, al tiempo que se consideró el apoyo familiar como moderador de estas relaciones. La muestra estuvo formada por 5.960 adolescentes de entre 12 y 18 años que completaron autoinformes (M=14,94; DE=1,61; mujeres: 50,7%) de Chipre, Alemania, Grecia, India, España, Corea del Sur y Tailandia. Se estimó un modelo de ecuaciones estructurales para investigar la relación entre mediación parental, apoyo social y afrontamiento. Se halló una relación positiva entre la mediación parental instructiva y el uso de estrategias de afrontamiento centradas en el problema y una relación negativa entre la mediación parental restrictiva y la capacidad de los adolescentes para afrontar de forma adecuada el ciberodio. Además, el apoyo familiar moderó estas relaciones, incrementando la relación entre mediación instructiva y afrontamiento y disminuyendo la relación entre mediación restrictiva y afrontamiento de ciberodio. Los hallazgos enfatizan la necesidad de proporcionar información a los padres y ponen de manifiesto la importancia de que las familias fomenten la habilidad de los adolescentes para afrontar de manera adecuada el ciberodio.
Inferring the evolutionary stages of the internal structures of NGC 7538 S and IRS1 from chemistry

To unambiguously diagnose the detailed physical mechanisms and the evolutionary status of high-mass star-forming regions (HMSFRs), we have performed 0.4" ($\sim1000$ AU) resolution observations towards NGC7538S and IRS1, using the Plateau de Bure Interferometer (PdBI). This paper presents a joint analysis of the 1.37 mm continuum emission and the line intensity of 15 molecular species. Assuming local thermal equilibrium, we derived molecular column densities and molecular abundances for each internal gas substructure which is spatially resolved. These derived quantities are compared with a suite of 1-D gas-grain models. NGC7538S is resolved into at least three dense gas condensations. Despite the comparable continuum intensity of these condensations, their differing molecular line emission is suggestive of an overall chemical evolutionary trend from the northeast to the southeast. Since these condensations are embedded within the same parent gas core, their differing chemical properties are the most likely due to the different warm-up histories, rather than the different dynamic timescales. Despite remaining spatially unresolved, in IRS1 we detect abundant complex organic molecules, indicating that IRS1 is the most chemically evolved hot molecular core presented here. We observe a continuum that is dominated by absorption features with at least three strong emission lines, potentially from $\rm CH_3OH$. The $\rm CH_3OH$ lines which are purely in emission have higher excitation than the ones showing purely absorption. Potential reasons for that difference are discussed. This is the first comprehensive comparison of observations of the high-mass cores NGC7538S and IRS1 and a chemical model. We have found that different chemical evolutionary stages can coexist in the same natal gas core. Our achievement illustrates the strength of chemical analysis for understanding HMSFRs.
GENETIC STUDIES ON GROWTH, EARLINESS YIELD AND ITS COMPONENTS, AND SEED QUALITY IN BROAD BEAN (Vicia faba L.)

A 4 x 4 diallel cross with reciprocals was performed among four cultivars of broad bean (Vicia faba, L.), i.e., two Spanish cultivars named Luz de otono and Reina mora, one local cultivar called Giza planka, and a selected line, cv. (Sabaaty). The four parents and their 12 F1 hybrids and reciprocal crosses were evaluated in a field experiment designed in a randomized complete block with 3 replicates. This investigation was carried out during the winter seasons of 2005/2006, 2006/2007 and 2007/2008 under field conditions at Sabaheya Horticultural Research Station, Alexandria Governorate, Egypt. The main objectives were to evaluate the average degree of heterosis in the crosses in addition to the estimation of combining ability and its components. The obtained results reflected generally that all of the first hybrid generations, including the reciprocal crosses, tended to show values either higher than those of their respective lower parental values or deviated towards their higher parental values for the vegetative growth characters. The results indicated also that all of the F1 hybrid populations were either more than their mid-or high- parental values for total yield and all its components characters. Positive heterosis estimates, relative to mid-parents, were detected in most of the F1 hybrids for vegetative growth characters. Concerning total yield and its components, positive heterotic effects were noticed on most of the first hybrid generations, including reciprocals. The results indicated also that both general combining ability G.C. A. (additive effects) and specific combining ability S.C. A. (non-additive effects) appeared to be important in controlling the expression of all studied characters; but with relatively more important roles for S.C. A. effects. The results indicated also that the parental cultivar Reina mora (P1) could be considered as a good general combiner for breeding to earliness, vegetative characters and yield and its components. The combinations of P1 X P2, P1 X P3, and P2 X P3 exhibited significant positive values for the most characters of vegetative growth, yield and its components. Correlation values among pairs of characters exhibited that number of pods/plant and pod weight should to be the first concern for improving yield of faba bean.
Effects of Calcium Nitrate and IAA on Calcium Concentration and Quality of Satsuma Mandarin Fruit

Experiment was carried out with the fruit of Kamei satsuma mandarin cultivar. Calcium nitrate [Ca(NO3)2], IAA, and IAA + Ca(NO3)2 were sprayed at the stages of full bloom. 1 week and 3 weeks after full bloom, and 2 weeks before harvest. The calcium concentrations in the whole fruit, rind and pulp in different phases were investigated, and their fruit quality was analyzed in comparison with fruit infiltrated with Ca(NO3)2 after harvest and fruit of full ripe harvest. The results showed: 1) Ca concentrations in the rind of all spray treatments increased at 51 days after full bloom (DAFB) and 112 DAFB, whereas Ca concentrations in the whole fruit were not significantly different among sprays and control. At usual harvest, Ca concentrations in the whole fruit and pulp of all sprays were significantly higher than those of control. 2) Soluble solids content (SSC) and titratable acidity (TA) of spray treatments were all statistically lower than those of control, while soluble sugar (SS) concentration, mean single fruit weight, rind color parameters and relative inductivity of sprays did not differ significantly among sprays and control, SS/TA of all spray treatments were significantly higher than that of control. 3) At 30 days after usual harvest, Vc of IAA + Ca(NO3)2 spray and postharvest Ca infiltration treatments, and SSC and SS of full ripe fruit were all significantly higher than those of control and other treatments.
Optical switching in the twin-guide travelling-wave laser amplifier

Detailed calculations have been made of the optical switching behaviour in twin-guide travelling-wave laser amplifiers driven with equal current in each guide. For typical device parameters, appropriate to 1.55 μm InGaAsP devices, the analysis indicates that the switching occurs at about one quarter of the saturated power, which in practice means at about 1 mW for an unsaturated gain of 26 dB. The factors influencing this switching power are discussed and some suggestions offered as to ways of reducing the value.
Ambiente de ensino de redes de computadores baseado em nuvem

Na area de redes de computadores, a montagem de laboratorios fisicos para as aulas praticas das disciplinas pode ser proibitivamente cara, alem de exigir uma constante atualizacao do hardware. Softwares como o Netkit permitem a criacao de laboratorios virtuais de redes utilizando-se apenas um computador, contudo necessitam de uma etapa de configuracao que pode ser complexa e demandam, de qualquer forma, maquinas fisicas individualizadas por aluno. Este trabalho apresenta um ambiente em nuvem para ensino de redes de computadores, que permite executar o Netkit em maquinas virtuais pre-configuradas na nuvem Amazon AWS. Alem disso, e disponibilizado um portal na Web com diversos roteiros de laboratorios prontos para serem instanciados na nuvem e utilizados de qualquer lugar.
Effects of Diesel Exhaust Particles on Left Ventricular Function in Isoproterenol-Induced Myocardial Injury and Healthy Rats

The associations between ambient particulate matter with an aerodiameter less than 2.5 μ m (PM2.5) and congestive heart failure (CHF) have been reported. However, the underlying mechanisms remain unclear. We investigated the effect of diesel exhaust particles (DEPs) on left ventricular function in isoproterenol (ISO)-induced myocardial injury and healthy rats. Male Sprague-Dawley (SD) rats were injected with ISO or normal saline. Seven days later, both groups were further assigned to receive either DEPs or normal saline by intratracheal instillation (IT). Echocardiography was used to measure fractional shortening (FS) and left ventricular end-diastolic diameter (LVDd) 24 h before and after IT in each rat. Fractional shortening (FS) was significantly decreased in SD rats treated with ISO as compared to those treated with normal saline (p < .05, t-test). When FS and LVDd before and after treatment were compared in each rat, there was no difference for normal saline treatment in healthy or ISO groups. However, there was significantly lower FS before and after DEPs exposure in both groups (p < .05, paired t-test). When using SD rats treated with normal saline as a reference group, both SD rats treated with DEPs and ISO rats treated with normal saline had lower FS (p < .05 and.0001, respectively, t-test), while ISO rats treated with DEPs had the lowest FS (p < .0001, t-test). Echocardiographic assessment revealed that left ventricular function was impaired by acute DEPs exposure, and this LV function was further compromised in rats with preexisting ISO-induced myocardial injury.
Decreasing Effect of Fructus Xanthii Aqueous Extract on Blood Glucose in Tested Mice

These experiments studied the decreasing effects of Fructus Xanthii on blood glucose in tested mice and dose-effect relationship.Tested Kunming mice were given three doses of fructus xanthii which were high-dose group(2.5g/kg),mid-dose group(1.9g/kg),and low-dose group(1.25g/kg). Others were positive control group(Chinese medicine),tested control group and normal control group.All mice were given drugs by ig under room temperature for ten days.Then blood glucose was determined by the enzyme method and observed the change on blood glucose in tested mice.Glucose levels of three dose-groups were lower than that of the tested control group.Fructus Xanthii could regulate glucose and make it stable.The study showed the hypoglycemic effect of Fructus Xanthii on blood glucose in mice.And effects of three doses is positive to three doses from 1.25g/kg to 2.5g/kg.
Synthesis, Characterization and Properties of Asymmetrical Porphyrin with [p-Flourobenzoyl]-m-Ethyloxy] Phenyl and its Metal Complexes

A new asymmetrical 5-[p-(4-flourobenzoyloxy)-m-ethyloxy] phenyl-10, 15, 20–triphenyl porphyrin and its transition metal (Zn, Cu, Ni, Co, Mn) complexes were synthesized. Their constitute and structure were characterized by elemental analyses, UV-vis, IR, molar conductances and 1H NMR. Optical properties were discussed by fluorescence spectrum, and their high thermal stability was explained by thermal analytical results.
RESEARCH OF EFFICIENCY OF PURIFICATION OF ETHANE-ETHYLENE CUT COMING FROM STEAM CRACKING FROM ACETILENIC COMPOUNDS ON DIFFERENT CATALYSTS

Physicochemical properties of Pd-containing catalysts of hydrogenation were studied. The process of selective hydrogenation of acetylene in ethane-ethylene cut coming from steam cracking on foreign industrial catalysts № 111 and № 222 and domestic experimental catalyst № 277 with content of carbon monoxide in feed, equal to 0; 0,002; 0,02 % wt. was stud- ied. The influence of carbon monoxide on process of selective hydrogenation of acetylenic com- pounds in ethane-ethylene cut was studied.
Influence of Pasteurization and Fat Composition of Milk on the Volatile Compounds and Flavor Characteristics of a Semi-hard Cheese

The effects of pasteurization and fat composition were studied simultaneously during the manufacture of experimental semi-hard cheeses. Two different fat compositions were obtained by collecting milk in the spring from cows that grazed pasture on farms located on the plain and from cows that were fed hay on farms located in the mountains. Pasteurized milk was compared with raw milk, and creams from the two groups of cows were compared. The sensory profile of all of the cheeses showed predominantly milky flavors. The raw milk cheeses had a more intense flavor than the pasteurized milk cheeses. This difference was supported by the profiles of volatile compounds. Raw milk cheeses were characterized by higher amounts of numerous alcohols, fatty acids, and sulfur compounds, and pasteurized milk cheeses were characterized by higher amounts of ketones. These differences were related to the high level of indigenous microflora in raw milk cheeses. Alkenes were found to be more abundant in the cheeses from milk of cows grazing pasture and terpenes were more abundant in the cheeses from milk of cows fed hay, but flavor differences between these cheeses were very slight.
BIOLOGICAL ACTIVITY OF METHANOLIC AND AQ UEOUS EXTRACT OF GLYCOSMIS MAURITIANA AND STREBLUS ASPER

The present study focus on evaluations of the anti - oxidant property of few medicinal plants like Glycosmis mauritiana and Streblus asper and assay of bioactive compounds respons ible for its activity. Among these DPPH radical scavenging activity was highest with G.mauritiana with 93%, catalase activity with 1.0mg of protein , and acid phosphatase inhibition was highest with S.asper with alcoholic extract. K eywords : DPPH, Acid phosp hatase, catalase, bio - active compounds .
Hazard analysis and critical control points (HACCP) in the production of cassava (Manihot esculenta, Crantz) chips

oC). The pH and cyanide content of fresh roots and dried cassava chips were determined. The results showed that the mean pH of peeled fresh cassava roots and dried cassava chips ranged from 2.66-3.00 and 2.78-3.12 respectively; there was no significant differences (p>0.05) in their mean score, however, a correlation ‘r’ (p=0.05) was established between pH and cyanide content. There was marked reduction in cyanide content following drying (unpeeled-68 to 155; peeled-32 to 55; dried chips-21 to 39). Fresh local cassava variety root had higher level of cyanide content (155mg HCN/kg) indicating higher risk of toxicity. The result of the study also showed that drying significantly reduced the cyanide content during production of cassava chips and use of HACCP concepts in dried cassava chip production has been shown to be effective in reducing its cyanide content.
Transition Metal Solubilities in WC in Cemented Carbide Materials

Solubilities of different transition metals in WC in cemented carbides at around 1700 K were determined with atom probe tomography. Ta had the highest solubility, followed by Nb, Cr, and V, all with atom fractions in the 10−3 range. Ti and Mn showed lower, yet detectable, solubilities in the 10−6 or 10−5 range. Zr and Co solubilities were too low to be measured. The results were compared with the theoretically calculated solubilities using density functional theory. These calculations predicted that Ta, Nb, V, and Cr should have the highest solubility, all in the 10−4 or 10−3 range. Ti was predicted to have a lower solubility (10−5 range) and Co, Hf, and Zr even lower (10−8 or 10−7 range).