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Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

An articulated pes from a small parvicursorine alvarezsauroid dinosaur from Inner Mongolia, China

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Hone D. W. E., Choiniere J. N., Tan Q., Xu X.
Acta Palaeontologica Polonica
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2013
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tom 58
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nr 3
A near complete and articulated parvicursorine pes from the Campanian Wulansuhai Formation is described. This pes is referred to the genus Linhenykus and is one of the first foot skeletons to be described for a derived alvarezsaur, providing new information on the first digit of the pes. The evolution of a laterally directed flange of the anterior face of the distal third metatarsal in arctometatarsalian taxa is described and discussed. This flange may have increased stability of the foot during cursorial locomotion and may also provide useful taxonomic and systematic data.
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Aktywność antymikrobiologiczna olejku cynamonowego z chińskiego piołunu stanowiącego składniki aktywnej emulsji powłokotwórczej nanoszonej na celulozowe materiały opakowaniowe

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Tan Q., Barkowiak A., Suminska P.
Opakowanie
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2015
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nr 05
Aktywność antymikrobiologiczna naturalnych substancji aktywnych jest uzależniona od specyficznych warunków środowiskowych, co stanowi istotną informację podczas opracowywania aktywnych powłok nanoszonych na materiały opakowaniowe. W ramach niniejszej pracy oszacowano własności antymikrobiologiczne naturalnych ekstraktów olejku cynamonowego (Cinnamomum cassia) oraz olejku piołunowego (Artemisia argyi) (obie substancje pochodzące z Chin) względem Staphylococcus aureus w zależności od pH (5,0, 7,0, i 8,0) oraz temperatury (4, 20 i 37°C). Podczas badań stwierdzono, że aktywność antymikrobiologiczna zarówno olejku cynamonowego, jak i olejku piołunowego ulega obniżeniu, gdy wzrasta pH emulsji powłokotwórczej, a ich aktywność wzrasta wraz ze wzrostem temperatury Dodatkowo stwierdzono, że olejek cynamonowy jest bardziej stabilny podczas zmian pH i temperatury niż olejek piołunowy.
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Combustion and emissions investigation on low-speed two-stroke marine diesel engine with low sulfur diesel fuel

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Yang Z., Tan Q., Geng P.
Polish Maritime Research
|
2019
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tom 26
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nr 1
With the implementation and expansion of international sulfur emission control areas, effectively promoted the marine low sulfur diesel fuel (MLSDF) used in marine diesel engines. In this study, a large low-speed, two-stroke, cross-head, common rail, electronic fuel injection marine diesel engine (B&W 6S35ME-B9) was used for the study. According to diesel engine’s propulsion characteristics, experiments were launched respectively at 25%, 50%, 75%, 100% load working conditions with marine low sulfur diesel fuel to analyze the fuel consumption, combustion characteristics and emissions (NOx, CO2, CO, HC) characteristics. The results showed that: Marine diesel engine usually took fuel injection after top dead center to ensure their safety control NOx emission. From 25% to 75% load working condition, engine’s combustion timing gradually moved forward and the inflection points of pressure curve after top dead center also followed forward. While it is necessary to control pressure and reduce NOx emission by delaying fuel injection timing at 100% load. Engine’s in-cylinder pressure, temperature, and cumulative heat release were increased with load increasing. Engine’s CO2 and HC emissions were significantly reduced from 25% to 75% load, while they were increased slightly at 100% load. Moreover, the fuel consumption rate had a similar variation and the lowest was only 178 g/kW·h at 75% load of the test engine with MLSDF. HC or CO emissions at four tests’ working conditions were below 1.23 g/kW·h and the maximum difference was 0.2 or 0.4 g/kW·h respectively, which meant that combustion efficiency of the test engine with MLSDF is good. Although the proportion of NOx in exhaust gas increased with engine’s load increasing, but NOx emissions were always between 12.5 and 13.0 g/kW·h, which was less than 14.4 g/kW·h. Thus, the test engine had good emissions performance with MLSDF, which could meet current emission requirements of the International Maritime Organization
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A numerical and experimental study of marine hydrogen-natural gas-diesel tri-fuel engines

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Zhao R., Xu L., Su X., Feng S., Li C., Tan Q., Wang Z.
Polish Maritime Research
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2020
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tom 27
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nr 4
5

Effect of NO3 −: NH4 + ratios on growth, root morphology and leaf metabolism of oilseed rape (Brassica napus L.) seedlings

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Qin S., Sun X., Hu C., Tan Q., Zhao X., Xin J., Wen X.
Acta Physiologiae Plantarum
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2017
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tom 39
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nr 09
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Molybdenum-induced alteration of fatty acids of thylakoid membranes contributed to low temperature tolerance in wheat

76%
Wu S., Wei S., Hu C., Tan Q., Huang T., Sun X.
Acta Physiologiae Plantarum
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2017
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tom 39
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nr 10
7

Drought stress tolerance mediated by zinc-induced antioxidative defense and osmotic adjustment in cotton (Gossypium Hirsutum)

76%
Wu S., Hu C., Tan Q., Li L., Shi K., Zheng Y., Sun X.
Acta Physiologiae Plantarum
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2015
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tom 37
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nr 08
Zinc, as one of the essential microelements in crop plant, plays a crucial role in resistance to drought stress. To acquire a comprehensive of the physiological mechanism of resistance to drought stress enhanced by supplemental Zn in cotton, a hydroponic trial was conducted to investigate the changes in antioxidants and osmoregulation substances under zinc deficient and zinc sufficient conditions after 0, 3, 6 and 48 h of polyethylene glycol 6000-simulated drought stress. The present research showed that supplemental Zn significantly enhanced photosynthetic rate, chlorophyll a, chlorophyll b and dry matter of cotton under polyethylene glycol 6000 simulated drought stress, indicating that supplemental zinc improved the cotton growth. The antioxidant enzymes activities such as catalase, ascorbate peroxidase and superoxide dismutase, and non-enzymatic antioxidants such as carotenoid, reduced glutathione and ascorbic acid were all significantly enhanced and malonaldehyde content was remarkably reduced by supplemental zinc under polyethylene glycol 6000 simulated drought stress, indicating that the capacity of scavenging active oxygen species was improved by supplemental zinc in cotton. The osmoregulation substances such as soluble sugar, proline and soluble protein were all enhanced by supplemental zinc under Polyethylene glycol 6000 simulated drought stress, suggesting that zinc enhanced the osmotic adjustment capacity of cotton. It is implied that supplemental zinc could enhance the resistance to drought stress by inducing the buildup of antioxidative defences and osmotic adjustment ability in cotton.
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Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Osteology of the Late Cretaceous alvarezsauroid Linhenykus monodactylus from China and comments on alvarezsauroid biogeography

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Xu X., Upchurch P., Ma Q., Pittman M., Choiniere J., Sullivan C., Hone D. W. E., Tan Q., Tan L., Xiao D., Han F.
Acta Palaeontologica Polonica
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2013
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tom 58
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nr 1
The alvarezsauroid theropod Linhenykus monodactylus from the Upper Cretaceous of Inner Mongolia, China is the first knownmonodactyl non−avian dinosaur, providing important information on the complex patterns of manual evolution seen in alvarezsauroids. Herewe provide a detailed description of the osteology of this taxon. Linhenykus shows a number of fea− tures that are transitional between parvicursorine and non−parvicursorine alvarezsauroids, but detailed comparisons also re− veal that some characters had a more complex distribution. We also use event−based tree−fitting to perform a quantitative analysis of alvarezsauroid biogeography incorporating several recently discovered taxa. The results suggest that there is no statistical support for previous biogeographic hypotheses that favour pure vicariance or pure dispersal scenarios as explana− tions for the distributions of alvarezsauroids across SouthAmerica, NorthAmerica andAsia. Instead, statistically significant biogeographic reconstructions suggest a dominant role for sympatric (or “within area”) events, combined with a mix of vicariance, dispersal and regional extinction. At present the alvarezsauroid data set is too small to completely resolve the biogeographic history of this group: future studies will need to create larger data sets that encompass additional clades.
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