Analysis of rDNA Regions of Five Freshwater Unionid Mussel Species in Presque Isle Bay,Southeastern Lake Erie

Population structure and fecundity of freshwater mussels can be difficult to assess due to the benthic habitat and complex life cycles of these organisms. However, rapid and reliable classification of unionids can be accomplished with polymerase chain reaction if species-specific DNA primers are established. In this report we describe the sequence analysis of the ITS1 and ITS2 regions from five mussel species (Amblema plicata, Fusconia flava, Lampsilis siliquoidea, Ligumia nasuta, and Pyganodon grandis) isolated from a refuge in Lake Erie. Sequence comparison revealed strong similarities between A. plicata and F. flava and between L. siliquoidea and L.nasuta. P. grandis contained regions of additional DNA not present within the other species. Our study confirmed the placement of Ligumia nasuta within the Lampsilinae. The analysis also revealed DNA sequences within the ITS1 and ITS2 regions that are species-specific. Thus, the development of species-specific PCR primers can be utilized for analysis of adult populations and for glochidia on host fish.     

SHIP HYDRODYNAMICS BASIC RESEARCH IN THE UNITED STATES

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消费者属性对产品造型相似度认知的影响

目的 研究消费者属性对产品造型相似度认知的影响,为优化产品造型空间,提高人们对其认知的一致性提供依据。方法 首先,采用传统的方法,筛选出四十三个家用加湿器样本,构建产品造型空间,邀请七十三位被试,根据造型相似度将其进行多层分类,获取样本间造型相似度数据及被试属性数据;其次,基于轮廓分析法,依次分析不同属性下各组被试对各样本造型相似度认知的一致性;最后,根据异常样本的分布情况,分析各属性对产品造型相似度认知的影响程度。结论 生活形态属性对被试产品造型相似度认知的影响显著,异常率达20%以上,并且强于人口综合特征的影响;学历、性别、专业背景则基本无影响。应引入生活形态因素,检验人们对产品样本造型认知的一致性,进一步优化产品造型空间。     

A perturbation technique to model InGaAs/InP and GaAs FETs for millimeter-wave integrated circuits

A perturbation method is described to analytically model the electrical behavior of submicron FETs for millimeter-wave circuit applications. The approach includes the determination of the two-dimensional potential distribution in a non-rectangular depletion region. The result is used to derive analytical expressions for the threshold voltage and transconductance of FETs.     

Development and validation of the Cognitive Status Examination.

The Cognitive Status Examination (CSE) provides a valid, structured format to assess cognitive status. The exam is composed of 58 items representing six cognitive, motor, and sensory areas. The initial study evaluated 197 patients, and the validity study evaluated 296 patients. In both studies, the exam significantly discriminated the brain-damaged from the psychiatric and medical groups. The relation of scores to age and education as well as the effects of demographics on group discrimination are examined. A distribution of cutting scores for screening purposes is presented. The advantage of using items from diverse cognitive areas is discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Palm kernel shell as fuel for burning bricks

The use of an agricultural waste product, palm kernel shell, as a fuel for firing bricks is explored as a means of reducing environmental degradation and depletion of scarce firewood in Ghana. A simple but efficient methodology of clamp firing bricks using the new fuel is developed and tested. The resulting bricks are analysed for physical properties and suitability for construction use. The viability of palm kernel shell as a fuel for small-scale brick industries is considered. On etudie actuellement au Ghana les possibilites d'utilisation d'un dechet agricole, en l'occurrence, les coquilles de noix de palme, comme combustible dans les briqueteries; une telle solution permettrait de reduire la degradation de l'environnement et de diminuer l'appauvrissement des maigres reserves en bois de chauffage du pays. A cet effet, on met au point une methodologie simple mais efficace de cuisson des briques en brulant des dechets de coquilles de noix de palme. On analyse les proprietes physiques de ces briques et on verifie qu'elles conviennent a la construction. On etudie la viabilite de la coquille de noix de palme pour l'alimentation en combustible des petites briqueteries.     

Some Observations on Conductivity and Flocculation in Bismuth Subnitrate Suspensions

Bismuth subnitrate suspensions from 2 to 6% solids were flocculated with monobasic potassium phosphate. Their conductivity appeared to follow colloid theory as judged by the linear relationship observed between the suspension conductivity and the supernatant conductivity. However, no correlation was observed between this relationship and flocculation behavior. An alternate plotting technique revealed a correlation between flocculation and conductivity. The onset of flocculation as determined by sediment heights and optical microscopy was observed to coincide with a discontinuity in a conductivity versus electrolyte concentration plot. For bismuth subnitrate suspensions prepared with either potassium or aluminum chloride there was observed a gradual change in the state of aggregation from nonflocculated to flocculated on aging. This change was correlated with changes in the suspension conductivity and was interpreted on the basis of a hydrolysis of bismuth subnitrate catalyzed by chloride ions. Previous subnitrate is not flocculated by aluminum chloride. This study suggests that conductivity can be used in evaluating and developing suspensions of pharmaceutical interest.     

Relationships between Image Synthesis and Analysis Towards Unification?

Image analysis and image synthesis have evolved on separate tracks, at different paces. There is however an increasing awareness of the numerous and growing overlaps between the two fields. By detailing the various areas where such overlaps might be found this report wishes to promote unification of analysis and synthesis into "imagery".
Three ways of looking for common ground are presented: common theoretical background , common areas of study , and common applications . They show that the distinction between image synthesis and image analysis has outlived its usefulness. The absolute differences can be discarded; what remains is a great commonality of interest.     

Neurobehavioral indicators of early brain insult in high-risk neonates.

Neurobehavioral (NB) performance was evaluated in 248 neurologically at-risk neonates at neonatal intensive care unit discharge to investigate the relation between behavior and brain insult. Six brain insult groups were defined on the basis of findings from cranial ultrasonography and brainstem auditory evoked response tests. The NB evaluation consisted of a modification and condensation of the Einstein Neonatal NB Assessment Scale and the assessment of activated motor patterns described by Katona. Logistic regression analysis of normal vs. abnormal judgments of behavioral categories revealed that, independent of the effects of prematurity, different patterns of NB abnormalities were associated with different degrees and types of brain insult. (PsycINFO Database Record (c) 2011 APA, all rights reserved)