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Abstract  

The thermal degradation characteristics of head-to-head poly(styrene) [HHPS] should provide insight with respect to the impact of head-to-head placement on the thermal stability of traditional atactic head-to-tail polymer [HTPS]. The synthesis of head-to-head poly(styrene) must be accomplished indirectly. The head-to-head polymer is most satisfactorily obtained by dissolving metal reduction of poly(2,3-diphenyl-1,3-butadiene) [PDBD] generated by radical polymerization of the corresponding diene monomer. Full saturation of the polymer mainchain requires several iterations of the reduction procedure. Since the decomposition of poly(2,3-diphenyl-1,3-butadiene) is prominent at 374C and that for head-to-head poly(styrene) is similarly facile at 406C, it seemed feasible that TG of partially hydrogenated PDBD might be utilized as a convenient means of monitoring the extent of hydrogenation. This has been demonstrated for various levels of unsaturation remaining - from approximately 90 to less than 10%. Within this range the peak areas from the DTG plots of the partially hydrogenated polymer provide a good reflection of the ratio of unsaturated to saturated units in the polymer. Even low levels of unsaturation in the polymer may be detected by the asymmetry of the decomposition peak for the polymer.

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The blowfly Lucilia sericata (Meigen, 1826) (Diptera: Calliphoridae) is the primary agent of cutaneous myiasis of sheep in northern Europe, southern Africa, Australia and New Zealand. As the application of chemicals has several disadvantages, alternative control measures of traumatic myiasis of livestock must be developed. In this study, the use of entomopathogenic nematodes (EPNs) as potential biocontrol agents against second instar larvae of Lucilia sericata was considered. The following nematode species were tested: Heterorhabditis bacteriophora (IS 5, HHU 1, Hmo1, HNC 1, HAZ 36, Hbrecon, HHU 2, HAZ 29, HHP 88, HHU 3, HHU 4 and HGua), Steinernema intermedia, NC513 strain of S. glaserii, S. anomali, S. riobrave, Steinernema sp. and 5 strains of S. feltiae (22, Vija Norway, HU 1, scp, and IS 6). None of the examined EPN species or strains showed larvicidal efficacy at 37°C (no killing effect was observed in the case of the two heat-tolerant strains - H. bacteriophora and S. feltiae) against L. sericata larvae. At lower temperatures (20°C and 25°C) only strainsof S. feltiae were found to be active. The overall odds ratios calculated for L. sericata maggots to contract S. feltiae nematode infection show significant (p < 0.05) effect only in the case of strains HU 1, 22 and IS 6. In the case of strains HU 1 and 22 parasitic forms of S. feltiae could be detected in the dead larvae of L. sericata. Strain IS 6 (and also Vija Norway at 20°C) penetrated and killed fly larvae, but only adult forms of the nematode occurred in the cadavers.

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. Dispos. 2008 36 1088 1096 B. Li, T. Zhang, Z. Xu, H.H.P. Fang , Anal. Chim. Acta

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grain . Insect Sci. 13 : 421 – 429 . Severin , H.H.P. 1931 . Modes of antilops transmission by beet leaf beetle Eutettix tenellus (Baker) . Hilgardia 6

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Az iskola-egészségügyi ellátórendszer szerepe a gyermekkori elhízás prevenciójában – egy pilotvizsgálat tanulságai

The role of the school health care system in the prevention of childhood obesity – lessons of a pilot study

Orvosi Hetilap
Authors:
Lilla Matkovics
and
Edit Czeglédi

from: https://net.jogtar.hu/jogszabaly?docid=a1200020.emm [accessed: 06. 01. 2022]. [Hungarian] 11 Somhegyi A. Holistic Health Promotion (HHP): Present situation

Open access

SBA-15 silicas containing sucrose

Chemical, structural, and thermal studies

Journal of Thermal Analysis and Calorimetry
Authors:
M. Barczak
,
M. Oszust-Cieniuch
,
P. Borowski
,
Z. Fekner
, and
E. Zięba

. 14. Yiu , HHP , Wright , P , Botting , NP 2001 Enzyme immobilisation using SBA-15 mesoporous molecular sieves with functionalised surfaces . J Mol Catal B 15 : 81 – 92 10.1016/S1381-1177(01)00011-X

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, hospitalisations, and deaths due to zoonoses in 2018 were 359,692, 41,203, and 572, respectively ( EFSA, 2019 ), but the real numbers are likely to be much higher. Relatively new physical technologies (e.g. ionising radiation, high hydrostatic pressure – HHP, or

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. , Mitton , T. , & Vorkink , K. ( 2010 ). Expected idiosyncratic skewness . Review of Financial Studies, 23 ( 1 ), 169 – 202 . doi: 10.1093/rfs/hhp041

Open access