California State University, Long Beach

About: California State University, Long Beach is a education organization based out in Long Beach, California, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 10036 authors who have published 13933 publications receiving 377394 citations. The organization is also known as: Cal State Long Beach & Long Beach State.

Plant peptides and peptidomics.

Abstract: Extracellular plant peptides perform a large variety of functions, including signalling and defence. Intracellular peptides often have physiological functions or may merely be the products of general proteolysis. Plant peptides have been identified and, in part, functionally characterized through biochemical and genetic studies, which are lengthy and in some cases impractical. Peptidomics is a branch of proteomics that has been developed over the last 5 years, and has been used mainly to study neuropeptides in animals and the degradome of proteases. Peptidomics is a fast, efficient methodology that can detect minute and transient amounts of peptides and identify their post-translational modifications. This review describes known plant peptides and introduces the use of peptidomics for the detection of novel plant peptides.

Detection of human polyomaviruses and papillomaviruses in prostatic tissue reveals the prostate as a habitat for multiple viral infections.

Abstract: BACKGROUND To determine whether human polyomavirus (hPy) genomes are present in prostate tissues, we have carried out a polymerase chain reaction (PCR) screening in two sets of prostate samples, archival and fresh frozen, as well as performing in situ hybridization (ISH). The frozen prostate samples as well as the urine from the same patients were also screened for human papillomavirus (HPV) sequences. METHODS Highly sensitive nested-PCR assays were used. The detection of subpopulations of JC virus (JCV) -transcriptional control regions (TCRs) was also evaluated by Southern analysis and by direct DNA sequencing. An in situ hybridization technique was also used to detect JCV DNA in prostatic tissue. RESULTS The paraffin-embedded archival samples gave variable, unsatisfactory results. Results from the fresh frozen samples, however, were consistent and were frequently positive for JCV and less frequent for BK virus DNA. ISH confirmed the presence of JCV DNA in prostatic glandular epithelium. The TCR region of JCV from prostate tissue and urine from prostate cancer patients showed the presence of both archetypal and rearranged TCRs, including several new sequence variants. HPV DNA was also frequently detected and in some cases also mixed with hPy DNA from frozen tissue and urine. CONCLUSION The use of fresh frozen samples proved to be essential for consistent and reproducible detection of HPV and hPy viral DNAs. The presence of JCV DNA by ISH and the occurrence of a subpopulation of JCV TCR regions suggests that the prostate is a site for virus replication. The prostate is a complex habitat where mixed infections with oncogenic DNA viruses frequently occur and opens the discussion to the potential role of these viruses in the cancer of the prostate. Prostate 53: 263–276, 2002. © 2002 Wiley-Liss, Inc.

A Chicana Feminist Epistemology Revisited: Cultivating Ideas a Generation Later

Abstract: this article, the authors simultaneously examine how education scholars have taken up the call for (re)articulating Chicana feminist epistemological perspectives in their research and speak back to Dolores Delgado Bernal's 1998 Harvard Educational Review article, “Using a Chicana Feminist Epistemology in Educational Research.” They address the ways in which Chicana scholars draw on their ways of knowing to unsettle dominant modes of analysis, create decolonizing methodologies, and build upon what it means to utilize Chicana feminist epistemology in educational research. Moreover, they demonstrate how such work provides new narratives that embody alternative paradigms in education research. These alternative paradigms are aligned with the scholarship of Gloria Anzaldua, especially her theoretical concepts of nepantla, El Mundo Zurdo, and Coyolxauhqui. Finally, the authors offer researcher reflections that further explore the tensions and possibilities inherent in employing Chicana feminist epistemologies i...

Parental Strategies in Contrasting Cultural Settings: Families in México and “El Norte”

Abstract: A “culturally relevant pedagogy” has been recommended to enhance the achievement of Latino students in American schools In practice, this pedagogy is often based on a view of the home culture as static and in conflict with mainstream culture The present study compares the child-rearing practices and values of Mexican immigrants raising their children in the United States with those of their siblings who are raising children in Mexico The study contributes to the theories of culture, documenting the dynamic nature of cultural practices on both sides of the border and examining the implications of cultural change of different types for practice in language minority education

Port Dynamic Empty Container Reuse

Abstract: In this paper, empty container movements in the Los Angeles and Long Beach (LA/LB) port area are studied in an effort to reduce congestion by optimizing the empty container reuse. The dynamic empty container reuse is modeled analytically, and techniques are developed to optimize empty container operations. Several case studies based on current and projected demand in the LA/LB port area are used to evaluate the proposed techniques. Simulation results demonstrate that significant cost and congestion reductions can be achieved in the area, through reuse of empty containers.