Search Results - (Author, Cooperation:E. Levine)

2018-01-27

Nature Publishing Group (NPG)

2041-1723

Biology

Chemistry and Pharmacology

Natural Sciences in General

Physics

2018-06-27

MDPI Publishing

1661-7827

1660-4601

Energy, Environment Protection, Nuclear Power Engineering

Medicine

2012-06-05

Nature Publishing Group (NPG)

0028-0836

1476-4687

Biology

Chemistry and Pharmacology

Medicine

Natural Sciences in General

Physics

Animals ; Argonaute Proteins/metabolism ; Base Sequence ; Cell Aging/*physiology ; Drosophila Proteins/biosynthesis/genetics/*metabolism ; Drosophila melanogaster/*cytology/genetics/*metabolism ; Female ; Male ; MicroRNAs/*genetics ; Organ Specificity ; RNA Helicases/metabolism ; RNA, Messenger/genetics/metabolism ; RNA, Small Interfering/antagonists & inhibitors/genetics/metabolism ; RNA-Binding Proteins/biosynthesis/genetics/*metabolism ; Ribonuclease III/metabolism ; Stem Cell Niche/genetics/*physiology ; Testis/*cytology ; Transcription Factors/genetics/metabolism

2018-09-11

Nature Publishing Group (NPG)

2041-1723

Biology

Chemistry and Pharmacology

Natural Sciences in General

Physics

2015-06-20

American Association for the Advancement of Science (AAAS)

0036-8075

1095-9203

Biology

Chemistry and Pharmacology

Computer Science

Medicine

Natural Sciences in General

Physics

Animals ; Caenorhabditis elegans/*embryology/genetics/metabolism ; Caenorhabditis elegans Proteins/*metabolism ; Chromatin/*metabolism ; *Gene Expression Regulation, Developmental ; Genes, Helminth ; RNA Polymerase II/*metabolism ; Trans-Activators/*metabolism ; Transcription Initiation Site ; Transcriptome

0003-2670

Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Chemistry and Pharmacology

Electronic Resource

1471-4159

Blackwell Publishing Journal Backfiles 1879-2005

Medicine

Experimental induction of neurofibrillary tangles was demonstrated several years ago in the central nervous system of rabbits injected with aluminum salts. In the current studies, neuroblastoma cells, capable of morphologic and biochemical differentiation in monolayer culture, have been exposed to medium containing aluminum phosphate; such treatment resulted in an abundant accumulation of 100 Å neurofilaments after 6 days of continous exposure to the aluminum salt. While growth rates and incorporation of radioactive thymidine in treated cells remained similar to controls, total cellular protein, and incorporation of radioactive leucine were significantly increased. Paradoxically, when the protein content of aluminum-treated cultures was maximal, these cultures contained about 20 per cent less ribosomal RNA per cell than in control cultures. In addition, activity of an important neuronal protein, i.e. acetylcholinesterase, was depressed in treated cultures to a level below control values. Both temporal and morphologic similarities between treated neuroblastoma cultures and animals injected with aluminum salts suggest that the observed changes in macromolecular synthesis in cell culture are relevant to in vivo studies.

Electronic Resource

1365-4632

Blackwell Publishing Journal Backfiles 1879-2005

Medicine

Electronic Resource

1749-6632

Blackwell Publishing Journal Backfiles 1879-2005

Natural Sciences in General

Let X be a finite set of positive real variables. For each subset A of X, let πA =πXɛA x, and let s̀m denote the elementary symmetric polynomial of degree m in X. A Sperner collection on X is a family of subsets such that no one contains another. Two unrelated proofs that ΣAɛΓπA/s̀|A|≤ 1 are provided, where Γ is a Sperner on X, and |A| denotes the cardinality of A. This and other results which represent generalizations of a theorem of E. Sperner are discussed.

Electronic Resource

0006-291X

Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Biology

Chemistry and Pharmacology

Physics

Electronic Resource

0006-291X

Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Biology

Chemistry and Pharmacology

Physics

Electronic Resource

0022-2011

Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Biology

Electronic Resource

0012-1606

Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Biology

Electronic Resource

0006-291X

Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Biology

Chemistry and Pharmacology

Physics

Electronic Resource

0006-291X

Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Biology

Chemistry and Pharmacology

Physics

Electronic Resource

0261-2194

Agrotis ipsilon ; Zea mays ; plant recovery ; soil insecticides

Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Electronic Resource

1434-6036

Springer Online Journal Archives 1860-2000

Physics

Abstract. The recently introduced correspondence between one-dimensional two-species driven models and the Zero-Range Process is extended to study the case where the densities of the two species need not be equal. The correspondence is formulated through the length dependence of the current emitted from a particle domain. A direct numerical method for evaluating this current is introduced, and used to test the assumptions underlying this approach. In addition, a model for isolated domain dynamics is introduced, which provides a simple way to calculate the current also for the non-equal density case. This approach is demonstrated and applied to a particular two-species model, where a phase separation transition line is calculated.

Electronic Resource

1570-7458

Corn rootworms ; Diabrotica virgifera virgifera ; rearing ; fungal colonization ; mold control

Springer Online Journal Archives 1860-2000

Biology

Résumé Les œufs de D. virgifera virgifera sont généralement colonisés par un ensemble d'espèces de champignon, lors de leur incubation au laboratoire sur papier filtre ou papier buvard. Cylindrocarpon destructans (Zins.) Scholten prédomine parmi les espèces identifiées: plus de 95% des cas observés. La colonisation par des champignons réduit souvent considérablement le taux d'éclosion. L'influence du type de papier, de l'ébullition préalable, du substrat (papier ou sol), du pH, et de fongicides chimiques a été examinée. Ni le type de papier, ni son ébullition préalable ne modifient les taux d'éclosion et de contamination par les champignons. Lors de l'incubation à la surface du sol, le taux d'éclosion est significativement plus élevé et le nombre d'œufs contaminés significativement plus faible (P〈0.05) que sur papier filtre. Lorsque les œufs sont placés dans le sol, plus le temps de séjour est long, plus le taux d'éclosion est élevé et plus la colonisation par les champignons est faible. Le taux d'éclosion est significativement plus bas à pH 3 qu'aux pH de 4 à 8 et dans l'eau distillée. Les traitements des œufs au bénomyl et au thiram réduisent significativement les taux de contamination fongique par rapport au témoin (eau distillée). Les taux de contamination après traitement avec d'autres fongicides sont les mêmes que celui du témoin; par contre, les taux d'éclosion après traitement au bénomyl, au formaldéhyde, à l'eau de Javel, ou à l'éthanol sont significativement supérieurs à ceux des témoins. Le thiram élimine presque totalement la moisissure (0.5% de colonisation), mais tue presque tous les œufs (95.3%). L'effet fongique de bénomyl ne diffère pas significativement de celui du thiram. Le nombre de jours précédent la première éclosion, 50% d'éclosions, et la dernière éclosion des œufs traités au bénomyl ne diffère pas significativement de celui des témoins. Les traitements au bénomyl, à l'hypochlorite de sodium, au formaldéhyde n'affectent pas significativement les larves ayant émergé de ces œufs. A la lumière de ces résultats, le bénomyl semble le fongicide le plus efficace contre les champignons contaminant les œufs de D. virgifera virgifera au laboratoire.

Abstract When incubated on filter or blotter paper in the laboratory, eggs of the western corn rootworm, Diabrotica virgifera virgifera LeConte (Coleoptera, Chrysomelidae), were usually colonized and killed by the fungus Cylindrocarpon destructans (Zins.) Scholten. The effects of type of paper used during incubation and boiling, rearing substrate (paper or soil), pH, and antimicrobial chemicals on percent egg hatch and fungal colonization were evaluated. Neither paper type nor boiling the paper affected hatch or fungal colonization. Significantly (P〈0.05) higher numbers of eggs hatched and fungi colonized lower numbers of eggs when eggs were incubated on the soil surface than when they were incubated on filter paper. In treatments where eggs were placed within soil, the longer the eggs remained in the soil, the greater the percent egg hatch and the lower the incidence of fungal colonization. Egg hatch was significantly lower and fungal colonization significantly higher at pH 3 than at pH 4 through 8 and distilled water. Treatment of eggs with benomyl significantly reduced fungal colonization and increased hatch while not affecting the number of days required for initial, 50%, and last hatch of eggs or larval survival.

Electronic Resource

0191-6599

Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

History

Political Science

Electronic Resource

1432-2161

Ewing tumor ; Rib ; Computed tomography

Springer Online Journal Archives 1860-2000

Medicine

Abstract The ribs are frequent sites of primary Ewing tumor accounting for about 10–12% of all cases. The lesions may be predominantly lytic or sclerotic or show a combination of bone destruction and secondary reactive changes. In some patients bony changes are subtle and are obscured initially by frequently associated large extrapleural masses or pleural fluid. These patients may present clinically with findings secondary to compression of mediastinal structures by the soft tissue masses. Computed tomography (CT) is of great value in the diagnosis of such difficult cases and better demonstrates the tumor extent and relationships than other available imaging modalities. CT is also of considerable help in determining the optimal time for en bloc tumor resection. Many tumors are initially considered non-resectable due to extensive involvement of the lung, the mediastinum, or the diaphragm. CT accurately documents tumor regression during preoperative courses of chemotherapy.

Electronic Resource