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Beyond the receptor

Molecular Plant 2008年第2期1卷 195-197页

作者： russell jones

Had this Special Issue on plant hormones been published 5 years ago, it is likely that details about biosynthetic pathways would have taken center stage. As articles in this issue show, however, the field of plant hor... 详细信息

关键词： BrASSINOSTErOIDS GENES

Correlation between plasmid DNA damage induced by PM_(10) and trace metals in inhalable particulate matters in Beijing air

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Science China Earth Sciences 2006年第12期49卷 1323-1331页

作者： T. P. jones L. Merolla r. J. richard Department of Earth Ocean and Planetary Sciences Cardiff UniversityCardiff CF10 3YE UK School of Biosciences Cardiff University PO Box 911 Cardiff CF10 3US UK

Based on the study of Beijing PM10 bioreactivity with the newly developed plasmid DNA assay method, and analysis for trace elements of PM10, the cause of plasmid DNA damage by PM10 was investigated. The study showed that plasmid DNA oxidative damages by PM10 are of difference in different seasons at various areas. The concentrations of TM50 of PM10 in whole samples respectively collected at urban and comparison sites during winter were 900 μg mL?1 and 74 μg mL?1, while those in their corresponding soluble fractions were 540 μg mL?1 and 86 μg mL?1. In contrast, TM50 contents of PM10 from summer whole samples at urban areas and comparison sites were 116 μg mL?1 and 210 μg mL?1, whereas those in their soluble fractions were 180 μg mL?1 and 306 μg mL?1. The difference of bioreactivity of Beijing PM10 resulted from the variation of trace elements. The oxidative damage of plasmid DNA caused by Pb, Zn, As in PM10 (whole sample) was relatively strong. TM50 and Mn, V, Zn display stronger correlation in the soluble fraction. It implies that Zn could be the major trace element in Beijing PM10 which contributes to oxidative damage to plasmid DNA.

关键词： Beijing PM10 trace metals correlation health effect.

Effects of vertical position on trematode parasitism in larval anurans

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Current Zoology 2019年第6期65卷 657-664页

作者： Jacob r.jones Camille L.STEENrOD John A.MArINO Jr. Biology Department Bradley UniversityPeoriaILUSA Department of Geography University of MarylandCollege ParkMDUSA

Spatial distributions of animals can affect interactions with their natural enemies,such as parasites,and thus have important implications for host-parasite *** spatial variation in infection risk has been explored in many systems at the landscape scale,less attention has been paid to spatial structure at smaller ***,we explore a hypothesized relationship between a common spatial variable,vertical position,and risk of parasite infection in a model aquatic system,larval frogs(rana)and trematode(Digenea)*** position is relevant to this system given evidence that the densities of snail first intermediate hosts,tadpole second intermediate hosts,and trematode infective stages can vary with *** test the effects of depth on infection risk of larval frogs by trematodes,we performed two enclosure experiments,one in the laboratory and one in the field,in which larval frogs in cages just below the water surface or near the bottom of the water column were exposed to *** with near-surface cages,mean infection load(number of cysts)in tadpoles in near-bottom cages was 83%higher after 48-h exposures in the laboratory and 730%higher after 10-day exposures in the *** findings thus indicate that infection risk depends on depth,which may have adaptive significance,as tadpoles have previously been shown to change vertical position in response to parasite *** results motivate future work examining vertical variation in infection risk and may have broader implications for host-parasite dynamics and evolution of host and parasite behavior.

关键词： avoidance behavior cercariae Echinostomatidae host-parasite interactions rana spatial structure

Combustion reactivity of rice Husk: An Experimental and Numerical Investigation

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Journal of Thermal Science 1993年第2期2卷 152-156页

作者： Q.T.Pham I.r.Brown J.C.jones School of Chemical Engineering and Industrial Chemistry University of New South Wales Australia

The combustion reactivity of rice husk from New South Wales, Australia was measured by heating cubical baskets in controlled environment and monitoring the centre temperature. Frank-Kamenetskii's ignition theory was used to calculate the activation energy. results agreed well with tests on other cellulosic materials, Numerical simulations of temperature changes were carried out, using a special technique to deal with non-linearities in the heat conduction equation. The numerical results indicate that the time factor should be taken into account when evaluating self-combustion risks.

关键词： combustion reactivity kinetics rice husk heat conduction numerical method.

Satiety testing: ready for the clinic?

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World Journal of Gastroenterology 2008年第35期14卷 5371-5376页

作者： Michael P jones Division of Gastroenterology Northwestern UniversityChicagoIL 60611United States

Drink tests are advocated as an inexpensive, nonivasive technique to assess gastric function in patients with a variety of upper digestive symptoms. Many patients with dyspeptic complaints will achieve satiation or develop symptoms at ingested volumes below those typically required to achieve these endpoints in controls. Substantial variation in test performance exists and a greater degree of standardization is required. Additionally, it remains unclear exactly what drink tests measure as correlations with measures of gastric sensation, accomodation and emptying are modest at best. Finally, results of drink tests do not guide therpay. At present, these tests are best reserved for research studies and are not advocated for use in clinical practice.

关键词： Drink test Dyspepsia Gastroparesis

resolution beyond classical limits with spatial frequency heterodyning

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Chinese Optics Letters 2006年第3期4卷 148-151页

作者： A.Mudassar A.r.Harvey A.H.Greenaway J.D.C.jones School of Engineering and Physical Sciences Heriot-Watt UniversityUK

A technique for coherent imaging based on spatial frequency heterodyning is described. Three images corresponding to three physical measurements are recorded. For the first measurement, a scene is simply illuminated with a coherent beam and for measurements 2 and 3, the scene is projected with cosine and sine fringes, respectively. Due to spatial frequency heterodyning, upper and lower side hand information falls in the pass band of the imager. These bands are separated and correct phases and positions are assigned to these bands in the spatial frequency domain. An extension of bandwidth is achieved in the frequency domain and the inverse frequency domain data then give a high resolution coherent image.

关键词： resolution beyond classical limits with spatial frequency heterodyning

GENErATION AND MAINTENANCE OF A FIELD rEVErSED CONFIGUrATION BY MEANS OF A rOTATING MAGNETIC FIELD

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Chinese Physics Letters 1987年第10期4卷 461-464页

作者： A.Knight WU Cheng I.r.jones School of Physical Sciences The Flinders University of South AustraliaBedford ParkS.A.5042

An experiment in which a rotating magnetic field was used to drive current in a cylindrical device was *** driven current was of sufficient size to reverse the applied axial *** an equilibrium could equally well be termed a field reversed configuration(FrC).In this experiment the FrC lifetime appeared to be limited by the duration of the rotating field pulse(40ms)with no evidence of gross instabilities.

关键词： field rotating reversed

A method for automatic tuning of flight simulator motion platforms

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International Journal of Modeling, Simulation, and Scientific Computing 2017年第4期8卷 43-63页

作者： Michael jones German Aerospace Center Braunschweig NiedersachsenGermany

When tuning motion platforms,subjective opinion is usually regarded as sufficient for most applications,as it should provide verification that no false cueing ***,often systems are not configured to fully utilize the available motion for the desired *** paper presents a new method to objectively tune simulation motion *** usage of the available platform motion space is shown through an example of its application to a specific mission *** difference in motion filter settings for two simulator platform geometries is *** displays the suitability of the platforms for completion of the two-axis lateral reposition task.

关键词： Simulation flight motion optimization

AN ANALYSIS oF THE SHEAr FAILUrE OF rIGID-LINEAr HArDENING BEAMS UNDEr IMPULSIVE LOADING

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Acta Mechanica Sinica 1996年第4期12卷 338-348页

作者：王礼立 Norman jones Ningbo University Ningbo 315211China and also University of Science and Technology of ChinaHefei 230026China Impact research Centre Department of Mechanical EngineeringUniversity of Liverpool.P.O.Box 147Liverpool L69 3BXU.K.

A theoretical rigid-plastic analysis for the dynamic shear failure of beams under impulsive loading is presented when using a travelling plastic shear hinge model which tabes into account material strain hardening. The maximum dynamic shear strain and shear strain-rate can be predicted in addition to the permanent transverse deflections and other parameters. The conditions for the three modes of shear failure, i.e., excess deflection failure, excess shear strain failure and adiabatic shear failure are analyzed. The special case of an infinitesimally small plastic zone is discussed and compared with Nonaka's solution for a rigid, perfectly plastic material. The results can also be generalized to examine the dynamic response of fibre-reinforced beams.

关键词： shear failure rigid-linear hardening plastic beam dynamic response impulsive loading adiabatic shear