Neutrinos from supernovae: experimental status and perspectives

I discuss the state of the art in the search for neutrinos from galactic stellar collapses and the future perspectives of this field. The implications for the neutrino physics of a high statistics supernova neutrino burst detection by the network of detectors operating around the world are also reviewed.Comment: 19 pages, 12 figures. Extended version of talk given at IInd International Workshop on Matter, Anti-Matter and Dark Matter, Trento (Italy), 29-30 October 2001. A reduced version will appear in Int. J. of Mod. Phys.

The Ladies\u27 Garment Worker Speaks Volumes for the Woman Worker and Writer

The nine volumes of The Ladies’ Garment Worker, put through text analysis, would help find the voice of the International Ladies Garment Workers’ Union through their own publications. On a CUNY Commons site this analysis would provide digital images of each publication along with a timeline of frequently-used words and phrases that connect to each other; this analysis would establish the main “voice” and identity of the ILGWU women that would create a personified entity during these the issue that is analyzed, which is Volume 1 that was published throughout 1901. The identity of women workers, even under the unionization of the International Ladies Garment Workers Union is defined by unsafe work conditions and sexual harassment that led to sex slavery. Women workers became political and social activists in becoming strikers and part of a union that developed the “voice” of sisterhood and a rise for justice through these nine issues

The histology of dermal glands of mating Breviceps with comments on their possible functional value in microhylids (Amphibia: Anura)

During mating male and female Breviceps become ‘glued’ together. The distribution of multicellular dermal glands varies between the sexes. The mate has a large number of holocrine glands on the ventrum, while the female has similar glands on the dorsum of the back. II thus appears that both sexes contribute to the ‘glueing’ mechanism. New hypotheses to explain the adhesion between the sexes are proposed, viz., that the shift to terrestrial habils and subterranean laying in Breviceps have secondarily resulted in male si2e diminution. In other microhylids which adhere during aquatic oviposition, yet demonstrate a terrestrial morphology and habits, bouyancy is suggested to be of primary functional value.Material digitalizado en SEDICI gracias a la colaboración del Dr. Jorge Williams (FCNM-UNLP).Facultad de Ciencias Naturales y Muse

The histology of dermal glands of mating Breviceps with comments on their possible functional value in microhylids (Amphibia: Anura)

During mating male and female Breviceps become ‘glued’ together. The distribution of multicellular dermal glands varies between the sexes. The mate has a large number of holocrine glands on the ventrum, while the female has similar glands on the dorsum of the back. II thus appears that both sexes contribute to the ‘glueing’ mechanism. New hypotheses to explain the adhesion between the sexes are proposed, viz., that the shift to terrestrial habils and subterranean laying in Breviceps have secondarily resulted in male si2e diminution. In other microhylids which adhere during aquatic oviposition, yet demonstrate a terrestrial morphology and habits, bouyancy is suggested to be of primary functional value.Material digitalizado en SEDICI gracias a la colaboración del Dr. Jorge Williams (FCNM-UNLP).Facultad de Ciencias Naturales y Muse

Development of an in vitro model on cellular adhesion on granular natural bone mineral under dynamic seeding condition- A pilot study

Adhesion of osteogenic cells on biomaterials can be studied with static in vitro models, whereas models representing dynamic seeding conditions are rare. Herein, we present an in vitro model to study cell adhesion on granular biomaterials under dynamic seeding conditions. Radiolabeled osteogenic MC3T3-E1 cells were allowed to adhere to granules of natural bovine bone mineral (NBM) under constant rotation. Adhesion of MC3T3-E1 cells was determined by liquid scintillation counting, and cell morphology was visualized by scanning electron microscopy. Cell viability was determined by MTT assay under static and dynamic conditions, at room and body temperature, and in the presence or absence of serum. We show here that MC3T3-E1 cells rapidly adhere to NBM, reaching a peak 3 h after seeding. Attached cells display characteristic signs of spreading. Five to ten percent of total radioactivity remained on NBM after the removal of nonadherent cells. Viability is maintained at room temperature and under rotation for upto 3 h. This data suggests that the dynamic in vitro model presented here provides a tool to study cell adhesion on granular biomaterial

Rectificación taxonómica y nomenclatural del presente status del taxon Liolaemus melanops Burmeister 1888

The real status of the localised Liolaemus melanops Burmeister 1888 from Quelé Curá, Chubut, on the basis of its rediscovered original type, previously given as lost, is established. A reconsideration of the population units included in a general taxon “melanops”, is carried out. The formerly synonymized Liolaemus goetschi Müller & Hellmich 1938 from Río Negro sandy habitats is revalidated as separated species from L. melanops

High energy neutrinos from a slow jet model of core collapse supernovae

It has been hypothesized recently that core collapse supernovae are triggered by mildly relativistic jets following observations of radio properties of these explosions. Association of a jet, similar to a gamma-ray burst jet but only slower, allows shock acceleration of particles to high energy and non-thermal neutrino emission from a supernova. Detection of these high energy neutrinos in upcoming kilometer scale Cherenkov detectors may be the only direct way to probe inside these astrophysical phenomena as electromagnetic radiation is thermal and contains little information. Calculation of high energy neutrino signal from a simple and slow jet model buried inside the pre-supernova star is reviewed here. The detection prospect of these neutrinos in water or ice detector is also discussed in this brief review. Jetted core collapse supernovae in nearby galaxies may provide the strongest high energy neutrino signal from point sources.Comment: 17 pages, 5 figures, invited brief revie

Patagonian herpetology: XII. The iguanids of the Liolaemus fitzingeri group in Chubut: serological data and taxonomic position

Immunological tests and morphological observations are carried out on the polymorphic populations of Liolaemus fitzingeri melanops, from Peninsula Valdés and Puerto Madryn (Chubut). The identity of this form and the sympatric specimens referred to Liolaemus goetschi Müller and Hellmich is supported. The probable active speciation of the fitzingeri complex is pointed out, in accordance with the increasing serological distance between the still recognized subspecific taxa Liolaemus fitzingeri fitzingeri, Liolaemus fitzingeri canqueli and Liolaemus fitzingeri melanops.Material digitalizado en SEDICI gracias a la colaboración del Dr. Jorge Williams (FCNM-UNLP).Facultad de Ciencias Naturales y Muse

Patagonian herpetology. XV. Further immunological research on Argentine iguanids of the Liolaemus fitzingeri group

Immunological tests by means of the precipitin reactions support nearby serological relationships between the Liolaemus (fitzingeri) melanops populations from Chubut and the populations belonging to the same morphological group found North of the Colorado River (Argentina). Cross-reactions between samples from Mendoza (Carrizal), San Juan (Bermejo), La Rioja (Baldecitos, Talampaya) provinces and samples from Chubut (Puerto Madryn) emphasize a very high percentage of identical specific antigens. Evolutive trends of this peculiar and widespread group of psammophilous iguanid lizards are briefly analyzed.Material digitalizado en SEDICI gracias a la colaboración del Dr. Jorge Williams (FCNM-UNLP).Facultad de Ciencias Naturales y Muse

Patagonian herpetology. XV. Further immunological research on Argentine iguanids of the Liolaemus fitzingeri group

Immunological tests by means of the precipitin reactions support nearby serological relationships between the Liolaemus (fitzingeri) melanops populations from Chubut and the populations belonging to the same morphological group found North of the Colorado River (Argentina). Cross-reactions between samples from Mendoza (Carrizal), San Juan (Bermejo), La Rioja (Baldecitos, Talampaya) provinces and samples from Chubut (Puerto Madryn) emphasize a very high percentage of identical specific antigens. Evolutive trends of this peculiar and widespread group of psammophilous iguanid lizards are briefly analyzed.Material digitalizado en SEDICI gracias a la colaboración del Dr. Jorge Williams (FCNM-UNLP).Facultad de Ciencias Naturales y Muse