Medicine and Health Sciences Commons^™

Changes In Heart Rate Associated With Contest Outcome In Agonistic Encounters In Lobsters, Jesus Hernandez-Falcon, Alo Basu, Siddhartan Govindasamy, Edward Kravitz

Siddhartan Govindasamy

1. Agonistic contests between lobsters housed together in a confined space progress through encounters of increasing intensity until a dominance relationship is established. Once this relationship is established, losing animals continually retreat from the advances of winners. 2. These encounters are likely to consume much energy in both winning and losing animals. Therefore, one might expect involvement of many physiological systems before, during and after fights. Here, we report effects of agonistic encounters on cardiac frequency in winning and losing adult lobsters involved in dyadic interactions. 3. The results show that: (i) small but significant increases in heart rate are …

Reviewing The American University Law Review On Extraterritoriality: A Critical Response To Viki Economides, Note, Tianrui Group Co. V. Itc: The Dubious Status Of Extraterritoriality And The Domestic Industry Requirement Requirement Of Section 337(Link), Jonathan R. K. Stroud

Jonathan R. K. Stroud

Recently, the Federal Circuit upheld the Commission’s decision to exclude goods based on a trade secret violation that largely happened abroad. The American University Law Review critiqued that decision on two grounds: First, that a presumption against extraterritorial application of U.S. law applied; and second, that licensing alone could not establish a domestic industry. The American University Law Review's critique remains incomplete, however, as the Federal Circuit correctly decided the case for at least two reasons. first, the Federal Circuit correctly applied the “extraterritorial presumption” canon of construction; and second, the recent Federal Circuit decision in InterDigital Communications LLC v. …

Eight Is Enough?: The Ethics Of The California Octuplets Case, Scott Paeth

Scott R. Paeth

The recent California octuplets case raises a number of important issues that need to be addressed in the context of the increasingly widespread practice of in vitro fertilization. This paper explores some of those issues as looked at from the perspective of protestant theological ethics and public theology, examining the moral responsibilities of the various participants in the process, both before and after the octuplets’ birth, including the mother, her doctors, the health care bureaucracy, the wider society, and the media. Each of these participants failed in significant respects to consider the ethical implications of the births in this complicated …

The Distinguishing Characteristics Of Narrative Identity In Adults With Features Of Borderline Personality Disorder: An Empirical Investigation, Jonathan Adler

Jonathan M. Adler

While identity disturbance has long been considered one of the defining features of Borderline Personality Disorder (BPD), the present study marks only the third empirical investigation to assess it and the first to do so from the perspective of research on narrative identity. Drawing on the rich tradition of studying narrative identity, the present study examined identity disturbance in a group of 40 mid-life adults, 20 with features of BPD and a matched sample of 20 without BPD. Extensive life story interviews were analyzed for a variety of narrative elements and the themes of agency, communion fulfillment (but not communion), …

Rapid Inversion: Running Animals And Robots Swing Like A Pendulum Under Ledges, Jean-Michel Mongeau, Brian Mcrae, Ardian Jusufi, Paul Birkmeyer, Aaron M. Hoover, Ronald Fearing, Robert J. Full

Aaron M. Hoover

Escaping from predators often demands that animals rapidly negotiate complex environments. The smallest animals attain relatively fast speeds with high frequency leg cycling, wing flapping or body undulations, but absolute speeds are slow compared to larger animals. Instead, small animals benefit from the advantages of enhanced maneuverability in part due to scaling. Here, we report a novel behavior in small, legged runners that may facilitate their escape by disappearance from predators. We video recorded cockroaches and geckos rapidly running up an incline toward a ledge, digitized their motion and created a simple model to generalize the behavior. Both species ran …

Hovering Energetics And Thermal Balance In Anna's Hummingbirds (Calypte Anna), Dennis Evangelista, Maria J. Fernandez, Madalyn S. Berns, Aaron M. Hoover, Robert Dudley

Aaron M. Hoover

We studied the energetics of hover-feeding Anna's hummingbirds, using three different simultaneous techniques: heat loss as estimated via thermal imaging, metabolic rate as measured at a feeder mask using flow-through respirometry, and aerodynamic power estimated from wingbeat kinematic data. These three methods yielded comparable estimates of power output at ambient air temperatures ranging from 18 degrees to 26 degrees C, whereas heat imbalance at higher air temperatures (up to 34 degrees C) suggested loss by mechanisms other than convection and radiation from the body, such as evaporative cooling and enthalpy rise associated with exhaled air and excreted water and convective …

Lumbar Vertebral Density And Mechanical Properties In Aged Ovariectomized Rats Treated With Estrogen And Norethindrone Or Norgestimate, Carla Vanin, Neil Maclusky, Debbie Chachra, Mehran Kasra, Marc Grynpas, Robert Casper

Debbie Chachra

OBJECTIVE: This study was designed to investigate the effects of estrogen alone or combined with two different progestins, norethindrone or norgestimate, on bone density and compressive mechanical properties in an aged rat model.

STUDY DESIGN: Twenty 11-month-old female Sprague-Dawley rats were sham operated (intact control) and 80 wee overiectomized. Three groups of 20 ovariectomized rats were implanted with Silastic silicon rubber (Dow Corning, Midland, Mich.) capsules containing 5% estradiol (wt/wt) in cholesterol. All rats in the intact control (group 1) and the ovariectomized (group 2) and the first of the overiectomized plus estrogen (group 3) groups were injected subcutaneously daily …

The Effect Of Different Hormone Replacement Therapy Regimens On The Mechanical Properties Of Rat Vertebrae, Debbie Chachra, M. Kasra, Carla Vanin, N. Maclusky, R. Casper, Marc Grynpas

Debbie Chachra

The purpose of this study was to examine the effects of estrogen replacement, in concert with three different progestin regimens, on the mechanical properties of rat lumbar vertebrae. Ninety-two Sprague-Dawley rats (11 months old) were divided into six groups for treatment. The first group was an intact control, the second group (OVX) was ovariectomized only, and the third group (estrogen-only) was ovariectomized and received continuous estrogen through a 17-estradiol implant. The remaining groups were ovariectomized and received estrogen and progestin (norethindrone, NET) therapy; 3 g of NET was injected daily (estrogen plus continuous NET), or 6 g of NET was …

Radiation Dose Distributions In Three Dimensions From Tomographic Optical Density Scanning Of Polymer Gels: Ii. Optical Properties Of The Bang Polymer Gel, Yevgeniya Zastavker, Marek Maryanski, John Gore

Yevgeniya V. Zastavker

A newly developed method of radiation dosimetry makes use of the optical properties of polymer gels. The dose-response mechanism relies on the production of light-scattering polymer micro-particles in the gel at each site of radiation absorption. The scattering produces an attenuation of transmitted light intensity that is directly related to the dose and independent of dose rate. For the BANG polymer gel (bis, acrylamide, nitrogen, and gelatin) the shape of the dose-response curve depends on the fraction of the cross-linking monomer in the initial mixture and on the wavelength of light. At 500 nm the attenuation coefficient (μ) increases by …

Allelic Deletion On Chromosome 17p13.3 In Early Ovarian Cancer, Nancy Phillips, Michelle Ziegler, Diane Radford, Keri Fair, Todd Steinbrueck, Francisco Xynos, Helen Donis-Keller

Helen Donis-Keller

Multiple chromosome 17 loci may be involved in ovarian carcinogenesis. Fifty-seven sporadic ovarian epithelial tumors were examined for loss of heterozygosity at 15 loci on chromosome 17p. Eighty % (39 of 49) of informative tumors had allelic loss in 17p13.3 at D17S30, D17S28, or both loci within this region, including 3 of 7 tumors of low malignant potential and 4 of 5 nonmetastatic carcinomas. The smallest region of overlapping deletion extends from D17S28 to D17S30, a distance of 15 kb. Furthermore, several tumors have breakpoints within the region detected by the D17S30 probe. Chromosome 17p13.3 genes with potential tumor suppressor …

The Long-Term Effects Of Water Fluoridation On The Human Skeleton, Debbie Chachra, H. Limeback, T. Willett, Marc Grynpas

Debbie Chachra

Municipal water fluoridation has notably reduced the incidence of dental caries and is widely considered a public health success. However, ingested fluoride is sequestered into bone, as well as teeth, and data on the long-term effect of exposure to these very low doses of fluoride remain inconclusive. Epidemiological studies suggest that effects of fluoride on bone are minimal. We hypothesized that the direct measurement of bone tissue from individuals residing in municipalities with and without fluoridated water would reveal a relationship between fluoride content and structural or mechanical properties of bone. However, consonant with the epidemiological data, only a weak …

Tensional Forces Influence Gene Expression And Sutural State Of Rat Calvariae In Vitro, S. Tholpady, T. Freyman, Debbie Chachra, R. Ogle

Debbie Chachra

BACKGROUND:

Theories regarding the cause of craniosynostosis that are more than 15 years old cite the role that tensional forces play in the normal and abnormal development of the cranial suture. These theories highlight the effect of stress bands originating from the skull base to the vertex, guiding sutural development.

METHODS:

In this study, the normally fusing posterior intrafrontal suture of the rat was subjected to 3 mN of tensional force for 30 minutes per day. The suture was then assessed for patency, proliferation, apoptosis, and transforming growth factor (TGF)-beta signaling components.

RESULTS:

Sutures that were subjected to tensional force …

Letter To The Editor: Adderall Abuse Sets Add Patients Back, Andrew Blitman

Andrew Blitman

No abstract provided.

Myelopoiesis In Spleen Producing Distinct Dendritic-Like Cells, Jonathan Tan, Helen O'Neill

Jonathan Tan

Dendritic cells (DC) represent a heterogeneous class of antigen presenting cells (APC). Previously we reported a distinct myeloid dendritic-like cell present in spleen, as an in vivo counterpart to cells produced in murine spleen long-term cultures (LTC-DC). These cells, named 'L-DC', were found to be functionally and phenotypically distinct from conventional (c)DC, plasmacytoid (p)DC and monocytes. These results suggested that spleen may represent a niche for development of L-DC from endogenous progenitors. Adult murine spleen has now been investigated for the presence of L-DC progenitors. Lineage-negative (Lin)-ckitlo and Lin-ckithi progenitor subsets were identified as candidate populations, and tested for ability …

Suburban Poverty: Barriers To Services And Injury Prevention Among Marginalized Women Who Use Methamphetamine, Miriam W. Boeri, Benjamin Tyndall, Denise R. Woodall

Miriam W. Boeri

Objective: This paper aims to identify the needed healthcare and social services barriers for women living in suburban communities who are using or have used methamphetamine. Drug users are vulnerable to injury, violence and transmission of infectious diseases, and having access to healthcare has been shown to positively influence prevention and intervention among this population. Yet little is known regarding the social context of suburban drug users, their risks behaviors, and their access to healthcare. Methods: The data collection involved participant observation in the field, face-to-face interviews and focus groups. Audio-recorded in-depth life histories, drug use histories, and resource needs …

The Cost Of Treating Addiction From The Client's Perspective: Results From A Multi-Modality Application Of The Client Datcap, Kathryn Mccollister, Michael French, Jeffrey Pyne, Brenda Booth, Richard Rapp, Carey Carr

Michael T. French

There is a considerable disparity between the number of individuals who need substance abuse treatment and the number who actually receive it. This is partly due to the fact that many individuals with substance use disorders do not perceive a need for formal treatment. Another contributing factor, however, is a discrepancy between the real and perceived cost of services. Although many cost evaluations of substance abuse treatment have been conducted from the treatment provider perspective, less is known about the client-specific costs of attending treatment (e.g., lost work and leisure time, transportation, out-of-pocket and in-kind payments). Concerns about financial and …

Spleen As A Site For Hematopoiesis Of A Distinct Antigen Presenting Cell Type, Helen O'Neill, Kristin Griffiths, Pravin Periasamy, Rebecca Hinton, Ying-Ying Hey, Sawang Petvises, Jonathan Tan

Jonathan Tan

While spleen and other secondary tissue sites contribute to hematopoiesis, the nature of cells produced and the environment under which this happens are not fully defined. Evidence is reviewed here for hematopoiesis occurring in the spleen microenvironment leading to the production of tissue-specific antigen presenting cells. The novel dendritic-like cell identified in spleen is phenotypically and functionally distinct from other described antigen presenting cells. In order to identify these cells as distinct, it has been necessary to show that their lineage origin and progenitors differ from that of other known dendritic and myeloid cell types. The spleen therefore represents a …

Identification Of A Novel Antigen Cross-Presenting Cell In Spleen: A Counterpart To Cells Produced In Long-Term Culture, Jonathan Tan, Ben Quah, Kristin Griffiths, Pravin Periasamy, Yingying Hey, Helen O'Neill

Jonathan Tan

Antigen-presenting cells (APC), like dendritic cells (DC), are essential for T-cell activation, leading to immunity or tolerance. Multiple DC subsets each play a unique role in the immune response. Here, a novel splenic dendritic-like APC has been characterized in mice that has immune function and cell surface phenotype distinct from other, described DC subsets. These were identified as a cell type continuously produced in spleen long-term cultures (LTC) and have anin vivoequivalent cell type in mice, namely 'L-DC'. This study characterizes LTC-DC in terms of marker phenotype and function, and compares them with L-DC and other known splenic DC and …

A House Of Many Rooms: Healing Practice And The Ontology Of Health In Hmong Tradition And The Diaspora, Sam Grey

Sam Grey

Culture – the foundation of views about health and healing – is subject to modification, translation, and adaptation as it grapples with changes in its geographic, economic, and socio-political context. For the Hmong, an Indigenous people with a millennia-long history of regional and international migration, it can be said that their cultural context has been change itself. Given the empiricist certainty that Indigenous medical systems will invariably yield to modern education and the increased availability of biomedical services, the perpetuation of various traditional elements in the medical culture of the Hmong is nothing short of remarkable. As minorities in a …

Clinical Evaluation Of Keratin-Gelatin Composite Film For Wound Healing In Cats, Arul Jothi N., Thilagar S, Khaled M.A Hussin, Gayathri Thevi S, Sastry T.P

Khaled M.A Hussin