Plankton-feeding aggregation and occasional cleaning by adult butterflyfish, Chaetodon striatus (Chaetodontidae), in Southwestern Atlantic

Butterflyfishes of the genus Chaetodon (Chaetodontidae) are mostly bottom-feeders, and juveniles of some Pacific species are known to clean other fish, Herein we report on occasional cleaning by adult individuals of the Western Atlantic butterflyfish Chaetodon striatus, during their plankton-feeding aggregation, Four species of reef fish solicited cleaning to the butterflyfish amidst the aggregation.

Frequent p53 mutations and occasional loss of chromosome 4 in invasive bladder carcinoma induced by N-butyl-N-(4-hydroxybutil)nitrosamine in B6D2F1 mice

B6D2F1 mice (45/group) were treated with N-butyl-N-(4- hydroxybutyl)nitrosamine (BBN) or uracil as follows: Group 1 received 0.05% BBN in drinking water for the entire experiment, Group 2 received 5 mg of BBN by gastric gavage in 0.1 mL of 20% ethanol twice per week for 10 wk, Group 3 received a 2.5% uracil-containing diet for the entire experiment, and Group 4 was controls (received 0.1 mL of 20% ethanol by gavage twice per week for 10 wk). The surviving mice in Group 1 were killed after week 26 and those in the other groups after week 30. By week 15, three of 11 Group 1 and one of 15 Group 2 mice had bladder carcinoma. By 26 and 30 wk, respectively, invasive carcinomas were observed in 33 of 34 and six of 21 mice in Groups 1 and 2 and renal pelvic carcinomas in 11 of 34 and three of 21 mice in Groups 1 and 2. Four of 19 uracil-treated mice had bladder nodular hyperplasia. By polymerase chain reaction-single-strand conformation polymorphism and sequence analyses, 16 of 20 and two of five bladder carcinomas from Groups 1 and 2, respectively, showed mutations in the p53 gene. Ha-ras mutation was present in one case. Loss of heterozygosity analysis with simple-sequence length polymorphism markers for chromosome 4 showed that 10 of 21, two of 15, and nine of 13 mice in Groups 1-3, respectively, had heterozygous or homozygous deletions. B6D2F1 mice are therefore susceptible to the urothelial carcinogenic effects of BBN and develop frequent p53 mutations and chromosome 4 deletions. Chromosome 4 deletions were also seen with uracil.

BADGERS (Taxidea taxus) AS OCCASIONAL PESTS IN AGRICULTURE

The badger (Taxidea taxus). because of its strong propensity for digging, is considered North America's fossorial carnivore, feeding mostly on ground squirrels, pocket gophers, and mice throughout much of the western and midwestern continent. Badger excavations, primarily in search of food, produce mounds and deep holes which can damage alfalfa and other crops and damage farm equipment and water systems. Depredations include poultry, waterfowl, and eggs. Overall, the badger is considered a relatively minor vertebrate pest. As a furbearer it is considered a renewable natural resource. Most local pest problems are currently reduced through leghold trapping and shooting. Habitat modification through continuous rodent control is effective and a long-lasting badger control method.

Occasional white boarding : examining the effects of physics students' understanding of motion graphs

The Modeling method of teaching has demonstrated well--‐documented success in the improvement of student learning. The teacher/researcher in this study was introduced to Modeling through the use of a technique called White Boarding. Without formal training, the researcher began using the White Boarding technique for a limited number of laboratory experiences with his high school physics classes. The question that arose and was investigated in this study is “What specific aspects of the White Boarding process support student understanding?” For the purposes of this study, the White Boarding process was broken down into three aspects – the Analysis of data through the use of Logger Pro software, the Preparation of White Boards, and the Presentations each group gave about their specific lab data. The lab used in this study, an Acceleration of Gravity Lab, was chosen because of the documented difficulties students experience in the graphing of motion. In the lab, students filmed a given motion, utilized Logger Pro software to analyze the motion, prepared a White Board that described the motion with position--‐time and velocity--‐time graphs, and then presented their findings to the rest of the class. The Presentation included a class discussion with minimal contribution from the teacher. The three different aspects of the White Boarding experience – Analysis, Preparation, and Presentation – were compared through the use of student learning logs, video analysis of the Presentations, and follow--‐up interviews with participants. The information and observations gathered were used to determine the level of understanding of each participant during each phase of the lab. The researcher then looked for improvement in the level of student understanding, the number of “aha” moments students had, and the students’ perceptions about which phase was most important to their learning. The results suggest that while all three phases of the White Boarding experience play a part in the learning process for students, the Presentations provided the most significant changes. The implications for instruction are discussed.

David Einhorn : Memorial Volume ; seclected sermons and addresses

ed. by Kaufmann Kohler. A biographical essay by Kaufmann Kohler. A memorial oration by Emil G. Hirsch

Un grand rabbin francais Benjamin Lipman ... : (1819-1886) : Biographie, sermons, allocutions, lettres pastorales, lettres, notes

par Armand Lipman

Anglo-Jewish memories and other sermons

by Hermann Adler

Sermons et allocutions adressés à la jeunesse israélite

par Zadoc Kahn

Steering or drifting-which? : Sermons and discourses

by Israel Herbert Levinthal

Sermons by American rabbis

ed. and. published under the auspices of the Central Conference of American Rabbis

Sermones : Sobre los Lay Sermons de S. T. Coleridge

Entre 1816 y 1817, un lapso de la historia inglesa política y socialmente complejo, Coleridge pública dos curiosos textos bajo el titulo de Sermones Laicos, además de su Biographia Literaria, una recopilación de sus poemas, una obra de teatro y una nueva edición de su periódico The Friend. Los Sermones son curiosos artefactos de interpretación de la cultura que utilizan los libros proféticos de la Biblia y las nociones fundamentales de la filosofía trascendental para leer los problemas socio políticos de la escena contemporánea. Esa difícil combinación en la figura del Intelectual-Profeta deja un molde para críticos futuros como Thomas Carlyle, Thomas De Quincey, Matthew Arnold y T.S. Eliot.

Sermones : Sobre los Lay Sermons de S. T. Coleridge

Entre 1816 y 1817, un lapso de la historia inglesa política y socialmente complejo, Coleridge pública dos curiosos textos bajo el titulo de Sermones Laicos, además de su Biographia Literaria, una recopilación de sus poemas, una obra de teatro y una nueva edición de su periódico The Friend. Los Sermones son curiosos artefactos de interpretación de la cultura que utilizan los libros proféticos de la Biblia y las nociones fundamentales de la filosofía trascendental para leer los problemas socio políticos de la escena contemporánea. Esa difícil combinación en la figura del Intelectual-Profeta deja un molde para críticos futuros como Thomas Carlyle, Thomas De Quincey, Matthew Arnold y T.S. Eliot.

Sermones : Sobre los Lay Sermons de S. T. Coleridge

Entre 1816 y 1817, un lapso de la historia inglesa política y socialmente complejo, Coleridge pública dos curiosos textos bajo el titulo de Sermones Laicos, además de su Biographia Literaria, una recopilación de sus poemas, una obra de teatro y una nueva edición de su periódico The Friend. Los Sermones son curiosos artefactos de interpretación de la cultura que utilizan los libros proféticos de la Biblia y las nociones fundamentales de la filosofía trascendental para leer los problemas socio políticos de la escena contemporánea. Esa difícil combinación en la figura del Intelectual-Profeta deja un molde para críticos futuros como Thomas Carlyle, Thomas De Quincey, Matthew Arnold y T.S. Eliot.

Value, quality, purchasing habits and repurchase intention in B2C: differences between frequent and occasional purchasers

Este estudio propone un modelo integrador de la recompra en comercio electrónico (B2C), basado en la teoría de la confirmación de expectativas, tomando como partida el modelo de Bhattacherjee extendido con el modelo de satisfacción Cronin. El modelo de investigación se ha probado con 536 compradores españoles, usando análisis multigrupo. El modelo fue capaz de explicar más del setenta por ciento de la varianza de la intención de recompra. Como resultados, la relación entre la calidad y la satisfacción es no significativa para todos los tipos de consumidores y la relación entre la utilidad y la recompra es no significativa sólo para los compradores más frecuentes. Algunas ideas para llevar a la práctica son presentadas a modo de discusión.