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Selective Laser Sintering of Kaolin and Ceramics on Its Base

材料科学与工程（中英文版） 2010年第2期4卷 1-8页

作者： Marina Vlasova Pedro Antonio Marquez Aguilar Mykola Kakazey Erick Adrian Juarez-Arellano Vladimir Stetsenko tamara tomila Katerina Voitsehovsky Center of Investigation in Enginnering and Applied Sciences of the Autonomous University of the State of Morelos （CIICAp-UAEM） Av. Universidad Cuernavaca 1001 Mexico Institute for Problems of Materials Science National Academy of Sciences of Ukraine 3 Krzhyzhanovsky St. Kiev 252680 Ukraine Universidad del Papaloapan Circuito Central 200 Parque Industrial Tuxtepec 68301 Mexico

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MYB34, MYB51, and MYB 122 Distinctly Regulate Indolic Glucosinolate Biosynthesis in Arabidopsis thaliana

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Molecular Plant 2014年第5期7卷 814-828页

作者： Henning Frerigmann tamara Gigolashvili Botanical Institute and Cluster of Excellence on Plant Sciences (CEPLAS) University of Cologne Cologne Biocenter D-50674 Cologne Germany

The MYB34, MYB51, and MYB122 transcription factors are known to regulate indolic glucosinolate （IG） biosynthesis in Arabidopsis thaliana. To determine the distinct regulatory potential of MYB34, MYB51, and MYB122, the accumulation of IGs in different parts of plants and upon treatment with plant hormones were analyzed in A. thaliana seedlings. It was shown that MYB34, MYB51, and MYB122 act together to control the biosynthesis of 13M in shoots and roots, with MYB34 controlling biosynthesis of IGs mainly in the roots, MYB51 regulating biosynthesis in shoots, and MYB122 having an accessory role in the biosynthesis of IGs. Analysis of glucosinolate levels in seedlings of myb34, myb51, myb122, myb34 myb51 double, and myb34 myb51 myb122 triple knockout mutants grown in the presence of abscisic acid （ABA）, salicylic acid （SA）, jasmonate （JA）, or ethylene （ET） revealed that：（1） MYB51 is the central regulator of IG synthesis upon SA and ET signaling, （2） MYB34 is the key regulator upon ABA and JA signaling, and （3） MYB122 plays only a minor role in JA/ET-induced glucosinolate biosynthesis. The myb34 myb51 myb122 triple mutant is devoid of IGs, indicating that these three MYB factors are indispensable for IG production under standard growth conditions.

关键词： indolic glucosinolates regulation R2R3 MYB the triple myb34 myb51 myb122 mutant.

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Resource discovery in distributed digital libraries through visual knowledge navigation

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2005年第11期6卷 1306-1311页

作者： AHMAD Faisal SUMNER tamara Department of Computer Science University of Colorado Colorado 80309-0430 USADepartment of Computer Science University of Colorado Colorado 80309-0430 USA

In order to support users to search and browse for various resources, digital libraries are composed of discovery systems which provide user interface and information retrieve system. Recent researches in Information Retrieval have investi- gated different techniques through improving precision and recall to enhance the effectiveness of discovery system in digital libraries. In this paper, we present our work to enhance discovery system effectiveness with a different approach, through resource discovery based on visual knowledge navigation. In our Strand Map Services project under National Science Digital Library, we introduce the visual resource discovery system called conceptual browsing interfaces, to help educators and learners to locate, comprehend and use educational resources in digital libraries. The paper begins with a short introduction of the Strand Map Services. Then we illustrate the service architecture, the design and implementation of its major components. We will focus our discussion of how the visualization system of the Strand Map Services supports the visual knowledge navigation for distributed digital libraries. This includes the knowledge acquisition of the conceptual browsing interfaces, different knowledge representa- tions in the system perspective and user interface perspective, visualization system modules, algorithm and Web services inte- gration to use visual knowledge navigation to enhance resource discovery in digital libraries.

关键词： Discovery system Digital libraries Visualization Concept space Web services

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Improved Feistel-based ciphers for wireless sensor network security

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第8期9卷 1111-1117页

作者： tamara PAZYNYUK George S. OREKU Department of Computer Science and Engineering Harbin Institute of TechnologyHarbin 150006 China

Wireless sensor networks (WSNs) are exposed to a variety of attacks. The quality and complexity of attacks are rising day by day. The proposed work aims at showing how the complexity of modern attacks is growing accordingly, leading to a similar rise in methods of resistance. Limitations in computational and battery power in sensor nodes are constraints on the diversity of security mechanisms. We must apply only suitable mechanisms to WSN where our approach was motivated by the application of an improved Feistel scheme. The modified accelerated-cipher design uses data-dependent permutations, and can be used for fast hardware, firmware, software and WSN encryption systems. The approach presented showed that ciphers using this approach are less likely to suffer intrusion of differential cryptanalysis than currently used popular WSN ciphers like DES, Camellia and so on.

关键词： Security Cipher Wireless sensor network (WSN) Feistel scheme

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Inventory of unintentional POPs emission from anthropogenic sources in Antarctica

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Advances in Polar Science 2022年第2期33卷 156-166页

作者： Sergey KAKAREKA tamara KUKHARCHYK Institute for Nature Management National Academy of Sciences of Belarus-Laboratory on Transboundary PollutionSkoriny 10 Minsk 220076Belarus

In spite of remote location and very limited human activities,Antarctica is affected by persistent organic pollutants(POPs).POPs investigation in Antarctica has a comparatively long history,but there are still large knowledge gaps in assessment of their emission into *** the paper the results of the first inventory of unintentional POPs emission from anthropogenic sources in Antarctica for modern period and preliminary estimate for the late 1980s are *** of dioxin/furans(PCDD/Fs)emission in different media,as well as polychlorinated biphenyls(PCBs)and hexachlorobenzene(HCB)in air is based on methodology of emission factors and indicators of human *** following sources of POPs emission have been estimated:power generation and heating,waste incineration,mobile sources and open burning of waste(in the past).According to the data obtained,annual PCDD/Fs air emission for modern period comprises 60.74 mg toxic equivalent(TEQ),PCBs-5.09 mg TEQ,and HCB-457.6 *** 2.5 mg TEQ of dioxin/furans is released to residues,so total PCDD/Fs emission is amounted 63.23 mg *** incineration makes the greatest contribution to POPs emission(96% of PCDD/Fs,98%of PCBs and 36% of HCB air emission).In late 1980s open burning of waste was the major source of *** assessment shows that over a 30-year period air emissions of PCDD/Fs decreased about 13 times,PCBs-15 times and HCB-57 times,primarily due to the prohibition of open burning of waste in compliance with the Protocol on Environmental Protection to the Antarctic Treaty requirements.

关键词： persistent organic pollutants emission inventory PCDD/Fs PCBs HCB

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New insights into the regulation of cholesterol eft from the sperm membrane

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Asian Journal of Andrology 2015年第4期17卷 561-567页

作者： tamara Leahy Bart M Gadella Faculty of Veterinary Science University of Sydney 2006 Sydney Australia Department of Farm Animal Health and of Biochemistry and Cell Biology Faculty ofVeterinary Medicine Utrecht University Yalelaan 2 3584 CM Utrecht The Netherlands.

Cholesterol is an essential component of the mammalian plasma membrane because it promotes membrane stability without comprising membrane fluidity. Given this important cellular role, cholesterol levels are tightly controlled at multiple levels. It has been clearly shown that cholesterol redistribution and depletion from the sperm membrane is a key part of the spermatozoon＇s preparation for fertilization. Some factors that regulate these events are described （e.g., bicarbonate, calcium） but the mechanisms underlying cholesterol export are poorly understood. How does a hydrophobic cholesterol molecule inserted in the sperm plasma membrane enter the energetically unfavorable aqueous surroundings？ This review will provide an overview of knowledge in this area and highlight our gaps in understanding. The overall aim is to better understand cholesterol redistribution in the sperm plasma membrane, its relation to the possible activation of a cholesterol transporter and the role of cholesterol acceptors. Armed with such knowledlze, sl）erm handlin~ techniques can be adapted to better prepare spermatozoa for in vitro and in vivo fertilization.

关键词： ATP binding cassette transporters albumin high-density lipoprotein lipid rafts membrane fluidity membranemicrodomains membrane packing oxysterols reverse cholesterol transport sterol transporters

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On the criteria to create a susceptibility map to debris flow at a regional scale using Flow-R

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Journal of Mountain Science 2017年第4期14卷 621-635页

作者： PASTORELLO Roberta MICHELINI tamara D'AGOSTINO Vincenzo Department of Land EnvironmentAgriculture and Forestry(TeSAF)University of Padova35020 LegnaroItaly

Studies on susceptibility to debris flows at regional scale （ioo-looo km2） are important for the protection and management of mountain areas. To reach this objective, routing models, mainly based on land topography, can be used to predict susceptible areas rapidly while necessitating few input data. In this research, Flow-R model is implemented to create the susceptibility map for the debris flow of the Vizze Valley （BZ, North-Eastern Italy; 134 km^2）. The analysis considers the model application at local scale for three sub-catchments and then it explores the model upsealing at the regional scale by verifying two methods to generate the source areas of debris-flow initiation. Using data of an extreme event occurred in the Vizze Valley （4 August 2012） and historical information, the modeling verification highlights that the propagation parameters are relatively simple to set in order to obtain correct runout distances. A double DTM filtering - using a threshold for the upslope contributing area （0.1 km^2） and a threshold for the terrain-slope angle （15°） provides a satisfactory prediction of source areas and susceptibility map within the geological conditions of the Vizze Valley.

关键词： Debris flow Susceptibility map Flow-R Triggering areas Regional scale Alpine valley

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Stop flow lithography synthesis of non-spherical metal oxide particles

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Particuology 2014年第3期12卷 91-97页

作者： David Baah Tobias Donnell Julaunica Tigner tamara Floyd-Smith Materials Science & Engineering Department Tuskegee UniversityTuskegeeAL 36088USA Chemical Engineering Department Tuskegee UniversityTuskegeeAL 36088USA

Non-spherical micron and hand-sized particles and their composites have become essential in select application areas of optics, wear resistance, personnel protection, chemical mechanical polishing, and biomedicine. In this paper, the synthesis of composite and ceramic non-spherical particles using stop flow lithography is reported. Precursor suspensions of poly（ethylene glycol） diacrylate, 2-hydroxy- 2-methylpropiophenone and SiO2 or Al2O3 are prepared. The precursor suspension flows through a microfluidic device mounted on an upright microscope and is polymerized in an automated process. A photomask patterned with transparent geometric features, which define the cross-sectional shapes of the particles, masks the UV light to synthesize micron sized particles. Particles with axial dimensions ranging from 35 to 167μm were synthesized. Control of device channel depth and objective lens magnification enables the manipulation of the particle size. Composite particles in triangular, square, pentagonal, hexagonal, and circular cross sections were synthesized. Subsequently, the transformation of the composite particles into the corresponding metal oxide particles was achieved through polymer burn-offand sintering.

关键词： Microfluidics Stop flow lithography Electron microscopy

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Ad libitum water consumption prevents exercise-associated hyponatremia and protects against dehydration in soldiers performing a 40-km route-march

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Military Medical Research 2019年第3期6卷 201-207页

作者： Heinrich WNolte Kim Nolte tamara Hew-Butler Movement Physiology Research Laboratory School of PhysiologyFaculty of Health SciencesUniversity of the WitwatersrandJohannesburgSouth Africa Division Biokinetics and Sport Science Department of PhysiologyUniversity of PretoriaPretoriaSouth Africa Division of Kinesiology Wayne State UniversityDetroitMIUSA.

Background: It remains unclear if ad libitum water drinking, as a hydration strategy, prevents exercise-associated hyponatremia(EAH) during prolonged exercise. The aim of this study was to determine the incidence of EAH within the broader context of fluid regulation among soldiers performing a 40-km route-march ingesting water ad ***: Twenty-eight healthy male soldiers participated in this observational trial. Pre-and post-exercise body mass, blood and urine samples were collected. Blood samples were assessed for serum sodium([Na+]), glucose, creatinine, urea nitrogen(BUN), plasma osmolality, creatine kinase(CK), and plasma arginine vasopressin(AVP) concentrations. Plasma volume(PV) was calculated using hematocrit and hemoglobin. Urine samples were analyzed for osmolality and (Na+)Water intake was assessed by weighing bottles before, during and after the march. The mean relative humidity was 55.7%(21.9–94.3%) and the mean dry bulb temperature was 27.1°C(19.5°C-37.0°C) during the ***: Twenty-five soldiers(72±10 kg)(Mean±SD) completed the march in 09:11±00:43(hr:min). Participants consumed 736±259 ml/h of water and lost 2.8±0.9 kg(4.0%±1.4%, P<0.05) of body mass. Significant(pre-march vs. post-march;P<0.05) decreases in serum [Na+](141 mmol/L vs. 136 mmol/L), plasma osmolality(303 m Osmol/kg H2O vs. 298 m Osmol/kg H2O), and serum creatinine(111 μmol/L vs. 101 μmol/L) and urine [Na+](168 mmol/L vs. 142 mmol/L), as well as significant increases in plasma AVP(2 pg/ml vs. 11 pg/ml), plasma CK(1423 U/L vs. 3894 U/L) and urine osmolality(1035 m Osmol/kg H2O vs. 1097 m Osmol/kg H2O) were found. The soldier(72 kg) with the lowest postexercise sodium level completed the march in 08:38. He drank 800 ml/h, lost 2% body mass, and demonstrated(prepost) increases in plasma osmolality(294–314 m Osmol/kg H2O), BUN(20–30 mg/dl), AVP(2–16 pg/ml) and PV(41%). His urine osmolality decreased from 1114 m Osmol/kg H2O to 1110 m Osmol/kg H2O. No participants finished

关键词： Serum sodium concentration Exercise-associated hyponatremia Arginine vasopressin Fluid balance Electrolyte balance Military

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Transplanted: Chinese Herbal Medicine in the United States, 1800-1911

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Chinese Medicine and Culture 2023年第4期6卷 357-366页

作者： tamara Venit Shelton History Department Claremont McKenna CollegeClaremontCA 91711USA

Chinese medicine has a long history in the United States, dating back to its colonial period and extending up to the present. This essay focuses on the earliest generation of practitioners of traditional Chinese medicine in the United States. Although acupuncture is the modality most commonly associated with Chinese medicine in today's medical marketplace, up until the 1970s, Chinese healers in the United States typically specialized in herbalism. Well before mass emigration from China to the United States began, Chinese material medica crossed the oceans, in both directions: Chinese medicinal teas and herbs came west while Appalachian ginseng went east. Beginning in the 1850s, Chinese immigrants came to the United States and transplanted their health practices, sometimes quite literally by propagating medicinal plants in their adopted home. Over time, Chinese doctors learned how to sell their services to non-Chinese patients by presenting herbalism as “nature's remedies.”

关键词： American medicine Alternative medicine Chinese herbalism Natural medicine

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