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Distribution and Productivity of naturalized Alfalfa in Mixed-grass Prairie

American Journal of Plant Sciences 2019年第6期10卷 1030-1047页

作者： Lan Xu Arvid Boe Patricia S. Johnson Roger n. gates Christopher g. Misar Department of natural Resource Management South Dakota State University Brookings SD USA Department of Agronomy Horticulture and Plant Science South Dakota State University Brookings SD USA Department of natural Resource Management South Dakota State University West River Ag Center Rapid City SD USA College of Agricultural and Environmental Sciences Whitfield County Extension University of Georgia Dalton GA USA USDA-ARS northern Crop Science Laboratory Fargo ND USA

Alfalfa (Medicago sativa L.) is an important forage and conservation crop in north America but occurrences of naturalized alfalfa in rangelands are rare. A naturalized population of yellow-flowered alfalfa in mixed-grass prairie on the grand River national grassland in South Dakota has potential agricultural value for the region. Despite this value, the distribution pattern of this alfalfa among and within native plant communities in the northern great Plains is unknown. Field studies were conducted from 2003 through 2006 along topographic positions at two sites where yellow-flowered alfalfa was naturalized to evaluate the relationships of yellow-flowered alfalfa on biomass production, cover, species diversity, and alfalfa seedbank distribution characteristics. High yellow-flowered alfalfa cover (>50%) was associated with increased total biomass and occurred exclusively in swales and toeslopes that had silty loam soils. However, species diversity and non-alfalfa biomass were reduced when yellow-flowered alfalfa cover was high. Yellow-flowered alfalfa cover was lower and species richness was higher on backslopes and shoulder areas where sandy loam soils were present. A strong positive linear association existed between yellow-flowered alfalfa cover and alfalfa seedbank density (r values ranged from 0.76 to 0.82, P greater than 99% of the seeds were viable but germination rate was only 4%, indicating a high percentage of hard seed in this alfalfa population. naturalized yellow-flowered alfalfa was a dominant component of a stable, low diversity plant community composed of mainly introduced species in rich soils of swales/toeslopes that contributed to forage production and quality in mixed-grass prairie in the northern great Plains.

关键词： Biomass Production Diversity Falcata Lucerne Rangelands Seed Bank Species Richness

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EnVIROnMEnTAL ISSUES In THE AgRO BASED InDIAn PULP & PAPER InDUSTRY

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天津科技大学学报 2004年第S2期 168-173页

作者： S. Panwar,n.Endlay,S.Mishra,R.M.Mathur,A.g.Kulkarni ScientistsCentral Pulp & Paper Research InstituteSaharanpur -247001 (U.P.) India ScientistsCentral Pulp & Paper Research InstituteSaharanpur -247001 (U.P.) India ScientistsCentral Pulp & Paper Research InstituteSaharanpur -247001 (U.P.) India ScientistsCentral Pulp & Paper Research InstituteSaharanpur -247001 (U.P.) India ScientistsCentral Pulp & Paper Research InstituteSaharanpur -247001 (U.P.) India

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Synthesis and Characterization of Polysulfone Hydrogels

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Journal of Surface Engineered Materials and Advanced Technology 2014年第4期4卷 227-236页

作者： Francis n. Muya Lisebo Phelane Priscilla g. L. Baker Emmanuel I. Iwuoha SensorLab Department of Chemistry University of the Western Cape Bellville South Africa

Polysulfone (PSF) membranes are frequently used in ultrafiltration, due totheirchemical and structural stability and mechanical robustness. Despite these advantages, successful utilization of this membrane technology has been greatly limited by the susceptibility of these membranes to fouling, due totheirhydrophobic nature. Here we report on the synthesis and characterisation of hydrophilic PSF membrane materials prepared by incorporation of polyvinyl alcohol, through chemical crosslinking to produce mechanically and chemically stable PSF hydrogels. The hydrogel composition was controlled at three different ratios to evaluate the effect of the PSF contributioni.e.25:75, 50:50 and 75:25. PSF hydrogels were characterized using high resolution scanningelectronmicroscopy (HR-SEM), cyclicvoltammetry (CV), and drop shape analysis techniques. The polysulfone hydrogels formed showed a decrease in contact angle by 50% for all hydrogels regardless of their polysulfone contribution, confirming an improvement in hydrophilic nature. The electron diffusion and ionic transport properties of thehydrogels as immobilised thin films in aqueous solutions,wereevaluated using cyclic voltammetry.

关键词： Hydrogels Polysulfone Polyvinyl Alcohol Scanning Electron Microscopy Atomic Force Microscopy Contact Angle

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Electroluminescence Device to Implement the Clipped Hopfield neural network

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Semiconductor Photonics and Technology 1996年第2期2卷 124-129页

作者： XU Z g,CHEn Z X,JI A n,SHUAI J W(Xiamen University, Xiamen 361005,CHn)

The method,which used an electroluminescent device to implement the clipped Hopfield neural network,is presented in *** electroluminescence devices are used to represent the neurons and the photodetectors are used to represent the connection *** characteristics of the electroluminescence device and the photodetector are *** the characteristics of this system is discussed briefly.

关键词： Electroluminescent Devices neural nets neurons

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Shock compression and spallation damage of high-entropy alloy Al_(0.1)CoCrFeni

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Journal of Materials Science & Technology 2022年第33期128卷 1-9页

作者： n.B.Zhang J.Xu Z.D.Feng Y.F.Sun J.Y.Huang X.J.Zhao X.H.Yao S.Chen L.Lu S.n.Luo Key Laboratory of Advanced Technologies of Materials Ministry of EducationSouthwest Jiaotong UniversityChengdu 610031China The Peac Institute of Multiscale Sciences Chengdu 610031China Department of Engineering Mechanics South China University of TechnologyGuangzhou 510641China

Shock compression and spallation damage of a face-center cubic phase high-entropy alloy(HEA)Al_(0.1)CoCrFeni were investigated via plate impact experiments along with free surface velocity *** samples were characterized with transmission electron microscopy and electron backscatter *** Hugoniot equation of state and spall strength at different impact strengths were *** exists a power-law relation between spall strength and strain *** spall strength of Al_(0.1)CoCrFeni HEA is about 50%higher than those of previously studied HEAs and comparable to those widely applied structural stainless steels at the same shock *** glide and stacking faults are the important deformation mechanisms in the Al_(0.1)CoCrFeni *** are only observed at high shock *** in the Al_(0.1)CoCrFeni HEA is ductile in *** are nucleated preferentially in grain interiors,and the intragranular voids show a strong dependence on grain boundary misorientation and peak stress.

关键词： Al_(0.1)CoCrFeni High-entropy alloy Hugoniot Spall damage Microstructure

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EnVIROnMEnTAL ISSUES In THE AgRO BASED InDIAn PULP & PAPER InDUSTRY

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天津科技大学学报 2004年第A2期19卷 166-171页

作者： S. Panwar n.Endlay S.Mishra R.M.Mathur A.g.Kulkarni ScientistsCentral Pulp & Paper Research InstituteSaharanpur -247001 (U.P.) India ScientistsCentral Pulp & Paper Research InstituteSaharanpur -247001 (U.P.) IndiaScientistsCentral Pulp & Paper Research InstituteSaharanpur -247001 (U.P.) IndiaScientistsCentral Pulp & Paper Research InstituteSaharanpur -247001 (U.P.) IndiaScientistsCentral Pulp & Paper Research InstituteSaharanpur -247001 (U.P.) India

InTRODUCTIOnThe Indian Pulp & Paper Industry is more than a century old industry . The first paper mill was established in the year 1832 and today the number has grown to more than 400 in the organised sector which are located through out the country . In addition there are another 500 pulp & paper mills in the unorganized sector. The Indian pulp & paper industry can be categorised into large, medium and small depending on the scale of operation as indicated in Table -IMost of the large mills established initially were based on woody raw materials.

关键词：印度制浆业造纸业原材料生产技术环境保护污染治理

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“Streets of Fire”revisited:contact burns

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Burns & Trauma 2019年第1期7卷 295-308页

作者： Areta Kowal-Vern Marc R.Matthews Karen n.Richey Kathy Ruiz Michael Peck Arpana Jain Kevin n.Foster Arizona Burn Center Maricopa Medical CenterDepartment of SurgeryMaricopa Integrated Health System2601 E.Roosevelt StreetPhoenixArizona 85008USA Research Department Maricopa Integrated Health SystemPhoenixArizona 85008USA

Background:Pavement-street contact burns are *** study compared recent contact burns to those published in“Pavement temperature and burns:Streets of Fire”in *** hypothesis was that there were a significantly increased number of pavement-street burns,as a result of increased ambient temperatures,and that motor vehicle crash(MVC)contact burns were less severe than pavements-street ***:This was a retrospective burn center registry study of naturally heated surface contact burns during May to September from 2016 to *** analyses were performed with one-way analysis of variance(AnOVA)and Maximum Likelihood chi-squared for age,percent of total burn surface area(%TBSA),treatment,hospitalization,comorbidities,hospital charges,mortality,ambient,and surface temperatures(pavement,asphalt,rocks).Results:In the 1995 study,median ambient temperatures were 106(range 100–113)°F compared to the 108(range 86–119)°F highest noon temperature in the current *** ambient temperature differences were recorded on days with pavement burn admissions compared to days without these *** were 225 pavement,27 MVC,15 road rash,and 103 other contact *** major injuries in the pavement group were due to being“down”(unknown reason),falls,and *** to the others,the pavement group was older,56+years,pnd had smaller burns but similar length of *** percent of the 225 pavement group patients with full-thickness burns required skin *** were 13(6%)fatalities in the pavement group vs 1(4%)in the MVC group,p=*** were secondary to sepsis,shock,cardiac,respiratory,or kidney *** to survivors,the non-survivors had a significantly higher%TBSA(10%vs 4%),p=0.01,and lower glasgow Coma Scores(10 vs 15),p=***:There was a median 2°F increase in ambient temperature since *** increase in pavement burn admissions was multi-factorial:higher temperatures,population,and the number of old

关键词： Pavement Concrete Asphalt Contact burns Road rash Streets Highways Sand Rocks

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Effect of nitrogen Fertilization on Yield and Quality of Aromatic Rice in north-Western Indo-gangetic Plains

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Journal of Agricultural Science and Technology(B) 2011年第3期1卷 363-371页

作者： g. Mahajan M. S. gill n. Sharma T. S. Bharaj Rice Section Punjab Agricultural University Ludhiana 141004 India Directorate of Ext. Education Punjab Agricultural University Ludhiana 141004 India

Most of the aromatic rice cultivars are susceptible to disease, insect-pest attack and are more prone to lodging. Therefore, nitrogen is the key input for increasing the productivity of aromatic rice. Research analyzing the effects of n level on yield and quality characteristics of modem aromatic cultivars in the north-western Indo-gangetic Plains is not well documented. Therefore, the present study was conducted to optimise the n levels for higher yield and better quality of the modem aromatic rice cultivars. The mean grain yield increased by 22.5% when plots were supplemented with 40 kg/ha of n application as compared to control （unfertilized）. Among cultivars, Punjab Mehak 1 registered highest yield （5.3 t/ha） followed by Pusa Basmati 1121 （4.78 t/ha） and Punjab Basmati 2 （4.66 t/ha） respectively. Interactive effect between n levels and cultivars on grain yield revealed that in Punjab Mehak l, grain yield responded significantly up to 60 kg/ha of n application as compared to Pusa Basmati 1121 and Punjab Basmati 2 where it responded only upto 40 kg/ha of n application. All the quality characteristic found to be improved with n application, whereas amylose content decreased with 60 kg/ha of n application as compared to 20 and 40 kg/ha of n application.

关键词： Aromatic rice cultivars head rice recovery milling characteristics amylose content ASV score.

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Microsatellite Analysis of <i>Panax ginseng</i>natural Populations in Russia

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Chinese Medicine 2014年第4期5卷 231-243页

作者： galina D. Reunova Olga g. Koren Tamara I. Muzarok Yury n. Zhuravlev Department of Biotechnology Institute of Biology and Soil Science Far Eastern Branch of the Russian Academy of Sciences Vladivostok Russia

Panax ginseng C.A. Meyer is an endangered species in Russia. To restore this species, effective protective measures, including the reintroduction into favorable habitats, must be worked out considering the specificity of genetic structure of ginseng populations. One hundred and thirty-nine P. ginseng plants were collected from the forests of nine administrative areas of Primorsky Territory of Russia and transferred to a collection nursery for further investigation. Microsatellite markers were used to study the genetic diversity and the genetic structure of ginseng populations. For populations studied with SSR, the number of observed alleles was ranging from 15 to 25, allelic richness from 1.83 to 3.04, polymorphic loci from 62.5% to 87.7%, observed heterozygosity from 0.410 to 0.512 (an average of 0.453) and expected heterozygosity from 0.304 to 0.479, with an average of 0.393. The values of the inbreeding coefficient within populations (Fis) ranged from -0.447 to 0.056, and their average value was -0.296. genetic differentiation among populations was significant (Fst = 0.115) but an isolation-by-distance pattern was not detected. UPgMA and MS-tree confirmed the presence of genetic structure within P. ginseng and visualized genetic relationships of populations with similar pattern. STRUCTURE analysis revealed the genetic admixture between different ginseng populations. It was established with SSR markers that P. ginseng still preserves substantial genetic resources although all populations are largely exhausted. Because ginseng populations are significantly differentiated all of them should be restored. Considering the admixture of ginseng populations it would be advisable to apply the individual assignment test to verify the content of indigenous populations and to identify the "true" population plants to serve as stock material for reintroduction.

关键词： Panax ginseng genetic Diversity genetic Structure Microsatellites

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步进高度测量技术(英文)

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纳米技术与精密工程 2004年第3期2卷 196-202页

作者： ORJI n g RAJA J 美国北卡罗来纳大学机械工程与制造科学系美国夏洛特28223

回顾了步进高度测量技术在纳米计量中的应用 .分析了在步进高度测量技术中的一些分析方法、算法和误差源 ,表明了不同的算法会导致不同的结果 .提出了步进高度测量中的最佳操作过程 .

关键词：步进高度原子力显微镜纳米计量误差分析

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