检索结果-南通市图书馆

Sulfonation of Hydroxymethylated Lignin and Its Application

在线全文

学校读者我要写书评

暂无评论

Journal of Bioresources and Bioproducts 2019年第2期4卷 80-88页

作者： weijue GAOD john P.w.INwOODD Pedram FATEHI Department of Chemical Engineering and Green Processes Research Centre Lakehead University955 Oliver RoadThunder Bay P7B5E1Canada

To valorize kraft lignin,hydroxymethylation and sulfonation were applied on this under-utilized,but vastly available,*** hydroxymethylation pretreatment was conducted as means to improve the reactivity of *** sulfonation of hydroxymethylated kraft lignin was investigated by sulfuric acid and sodium sulfite treatments under various *** modified lignin samples were characterized for their charge density,solubility,elemental components,and molecular *** results showed that the hydroxymethylation facilitated the sulfonation by sodium sulfite,yielding a product(SSH-lignin)with the charge density of-1.2 meq/g and water solubility of 10 g/L under the conditions of Ns_(2)SO_(3)/lignin molar ratio of 0.49 mol/mol,95℃and 3 *** the other hand,hydroxymethylation hindered the sulfonation of lignin by sulfuric acid,yielding a product(SAH-lignin)with the charge density of–0.46 meq/g and solubility of 0.9 g/L under the conditions of H_(2)SO_(4)/lignin molar ratio of 14.8 mol/mol,80℃and 1 *** SSH-lignin had a high adsorption on kaolinite(17 mg/g)at a lignin concentration of 40 g/*** sulfonated lignins were also found to be effective coagulant for the cationic dye ethyl violet.

关键词： kraft lignin hydroxymethylation sulfonation adsorption dye removal

Status of the Specialty of Physical and Rehabilitation Medicine

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国康复医学杂志 2010年第9期25卷 819-822页

作者： john L . Melvin, MD MMSc john w. Norbury, MD Jefferson Medical College Department of Rehabilitation Medicine 25 S. 9th StPhiladelphia 19107

The objectives of this paper are to help specialists in Physical and Rehabilitation Medicine plan their careers, influence the future of the PRM specialty and advocate effectively for those with limitations of functioning. The experiences of the authors are the sources of its observations and suggestions. The senior author has had extensive national and international experience in the specialty as a clinician, teacher, researcher, manager, leader and advocate. The junior author adds the insights of one who only recently has become immersed in PRM. The following are suggestions and observations the authors believe could contribute to the future success of individual PRM specialists and the PRM specialty. ①Review and reinforce the significant accomplishments of PRM over the last 70 years. It has significantly expanded the focus of health care to include the importance of functioning. ②Identify the specialty′s current strengths, weaknesses, threats and opportunities. As a clinical specialty, it has expanded nationally and internationally, yet its research contributions remain limited. The absence of an evidence base for much of its activity risks reduced support from payers, yet the population needing its services continues to expand. ③Develop strategies to increase the ability of PRM specialists and PRM to improve the lives of people with or likely to have limitations of functioning. These strategies could include sharing best practices, supporting effectiveness research and developing expert consensus guidelines. The need for physicians who are experts in the strategies of improving the lives of those with complex problems of functioning will continue to expand. This need will assure the continuation of the specialty of PRM as long as it improves the abilities of its members to help those with problems of functioning, and it advocates for those whom its members serve.

关键词：健康检查身体检查医学临床

Lipid metabolism is associated with temperament,corticosteroid,and hematological measures in infant rhesus monkeys(Macaca mulatta)

在线全文

学校读者我要写书评

暂无评论

Zoological Research 2020年第6期41卷 709-714页

作者： john P.Capitanio Frederik Dethloff Christoph w.Turck Department of Psychology University of CaliforniaDavis 95616USA California National Primate Research Center University of CaliforniaDavis 95616USA Max Planck Institute of Psychiatry Munich 80804Germany

DEAR EDITOR,Individuals can differ in how their behavioral and physiological systems are *** fact that these individual differences persist across life suggests they are supported by physical structures that may ***,we explored three datasets associated with health and behavioral outcomes,which were obtained from infant rhesus monkeys during standardized assessment of biobehavioral *** in biobehavioral measures was related to variation in molecular pathways,as assessed by metabolomics.

关键词： infant metabolism Lipid

Photosynthate Unloading from Seed Coats of Phaseolus vulgaris L. an Attempt to Define Conditions Required for Stimulation by Abscisic Acid and Benzylamino Purine

在线全文

学校读者我要写书评

暂无评论

浙江大学学报(农业与生命科学版) 1990年第4期 120-128页

作者： john w.PATRICK Australia Department of Biological Sciences N.S.w.2038 The University of Newcastle

The instablity of the stimulation of photosynthate unloading from seed coats of Phaseolus vulgaris by abscisic acid (ABA ) and benzylamino purine ( BAP ) was studied in terms of experimental conditions. ABA stimulated photosynthate unloading at pH 6 and pH 8 without close dependence upon pH. ABA at a concentration range of 10-5-10-4 mol/L displayed stimulatory effect. However, BAP revealed no effect at a concentration range of 10-6-10-4 mol/L. Experiments designed with different transport time of 14C-photosynthate indicated that ABA might act at the plasma membrane of the unloading cells. Reducing endogenous ABA level by diminishing leaf area did not facilitate the manifestation of exogenous ABA function. Potassium ion stimulated photosynthate unloading from seed coats with highest promotion at 100 mmol/L K+. However, no dependence of ABA stimulation of photosynthate unloading on K+ was found.

关键词： Phaseolus vulgaris L. seed coats photosynthate unloading abscisic acid ( ABA ) benzylamino purine ( BAP )

Integral sliding mode based optimal composite nonlinear feedback control for a class of systems

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Control Theory and Technology 2014年第2期12卷 139-146页

作者： Zhou ZHENG weijie SUN Hui CHEN john T. w. YEOw College of Automation Science and Engineering South China University of Technology

This paper presents an optimization method of designing the integral sliding mode （ISM） based composite nonlinear feedback （CNF） controller for a class of low order linear systems with input saturation. The optimal CNF control is first designed as a nominal control to yield high tracking speed and low overshoot. The selection of all the tuning parameters for the CNF control law is turned into a minimization problem and solved automatically by particle swarm optimization （PSO） algorithm. Subsequently, the discontinuous control law is introduced to reject matched disturbances. Then, the optimal ISM-CNF control law is achieved as the sum of the optimal CNF control law and the discontinuous control law. The effectiveness of the optimal ISM-CNF controller is verified by comparing with a step by step designed one. High tracking performance is achieved by applying the optimal ISM-CNF controller to the tracking control of the micromirror.

关键词： Composite nonlinear feedback Integral sliding mode Input saturation PSO Micromirror

Explicit and Parameterized Episodes of warm-Season Precipitation over the Continental United States

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Atmospheric Sciences 2006年第1期23卷 91-105页

作者： Mitchell w. MONCRIEFF john D. TUTTLE Richard E. CARBONE National Center for Atmospheric Research BoulderColorado 80307-3000U. S. A.

This paper describes explicit and parameterized simulations of midsummer precipitation over the continental United States for two distinct episodes： moderate large-scale forcing and weak forcing. The objective is to demonstrate the capability of explicit convection at currently affordable grid-resolution and compare it with parameterized realizations. Under moderate forcing, 3-kin grid-resolution explicit simulations represent rainfall coherence remarkably well. The observed daily convective generation near the Continental Divide and the subsequent organization and propagation are reproduced qualitatively. The propagation speed, zonal extent and duration of the rainfall streaks compare favorably with their observed counterparts, although the streak frequency is underestimated. The simulations at -10-km grid-resolution applying conventional convective parameterization schemes also replicate reasonably well the diurnal convective regeneration in moderate forcing. The performance of the 3-km grid-resolution model demonstrates the potential of -1-km-resolution explicit cloud-resolving models for the prediction of warm season precipitation for moderately forced environments. In weak forcing conditions, however, predictions of precipitation coherence and diurnal variability are much poorer. This suggests that an even finer resolution explicit model is required to adequately treat convective initiation and upscale organization typical of the warm season over the continental U.S.

关键词： warm-season precipitation explicit simulation convective parameterization

Perception of artificial conspecifics by bearded dragons(Pogona vitticeps)

在线全文

学校读者我要写书评

暂无评论

Integrative Zoology 2019年第2期14卷 214-222页

作者： Anna FROHNwIESER Thomas w.PIKE john C.MURRAY Anna wILKINSON School of Life Sciences University of LincolnLincolnUK School of Computer Science University of LincolnLincolnUK wildlife Research Center Kyoto UniversityKyotoJapan

Artificial animals are increasingly used as conspecific stimuli in animal behavior ***,researchers often have an incomplete understanding of how the species under study perceives conspecifics,and,hence,which features are needed for a stimulus to be perceived *** investigate the features that bearded dragons(Pogona vitticeps)attend to,we measured their lateralized eye use when assessing a successive range of *** ranged through several stages of realism in artificial conspecifics,to see how features such as color,the presence of eyes,body shape and motion influence *** found differences in lateralized eye use depending on the sex of the observing bearded dragon and the artificial conspecific,as well as the artificial conspecific’s ***,this approach can inform the design of robotic animals that elicit biologically-meaningful responses in live animals.

关键词： bearded dragons conspecifics lateralized eye use perception

Artificial nesting habitats as a conservation strategy for turtle populations experiencing global change

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Integrative Zoology 2013年第2期8卷 209-221页

作者： john P.wNEK walter F.BIEN Harold w.AVERY Department of Biology Drexel UniversityPhiladelphiaPennsylvaniaUSA

Diamondback terrapins(Malaclemys terrapin)inhabit estuaries in eastern USA and may tolerate salinity of seawater for short *** North American estuaries are adversely affected by anthropogenic impacts,such as pollution,dredging and invasion by non-native *** nesting areas have been altered or destroyed,causing terrapins to nest on roadsides and artificial islands made of dredged substrate from bottom *** by non-native plants may suppress development and reduce survival of *** Barnegat Bay,New Jersey,USA,there is a mosaic of natural and degraded terrapin nesting *** investigated the effects of dredge soil and shade on the hatching success of diamondback terrapins to determine whether nesting habitat could be increased by using dredged bottom *** year 1,unshaded nests in natural loamy-sand had the highest hatching success(55.2%),while nests in dredge soil produced no *** year 2,nests in unshaded loamy-sand had a hatching success of 85.3%,whereas those in dredge soil,aged 1 year,had a hatching success of 59.4%.Dredge soil improved as an incubation substrate after aging 1 year by the washout of *** temperatures were generally cool and produced mostly male *** dredge soil may provide suitable nesting substrates for diamondback terrapins if used after one year,and may be particularly beneficial if used for constructing islands that provide new nesting sites with reduced access of mammalian predators.

关键词： dredge estuarine turtles hatching success Malaclemys terrapin nesting ecology nest temperature nest substrate shade

Live Long and Prosper：. Roles of Sugar and Sugar Polymers in Seed Vigor

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Molecular Plant 2018年第1期11卷 1-3页

作者： Lu wang john w. Patrick Yong-Ling Ruan School of Biotogicat Sciences University of Tasmania Hobart TAS Australia School of Environmental and Life Sciences University of Newcastle Newcastle NSW Australia

Seed vigor refers to the overall capacity of the seed to （1） germi- nate and emerge after sowing （i.e., germination vigor） and （2） retain this potential during postharvest storage, known as seed longevity. Seed vigor plays vital roles in plant growth and realiza- tion of crop productivity. Long shelf life of seeds and their rapid and uniform germination and seedling emergence are highly desirable commercial traits. Despite its central importance, how seeds acquire their vigor is poorly understood.

关键词： MEDICAGO-TRUNCATULA SEEDS ABIOTIC STRESS PLANTS MATURATION TOLERANCE LONGEVITY FRUCTAN GENE