Salix herbacea L. fragmented small population in the N-Apennines (Italy): response to human trampling disturbance

2006 ◽  
Vol 15 (12) ◽  
pp. 3881-3893 ◽  
Author(s):  
Graziano Rossi ◽  
Gilberto Parolo ◽  
Laura A. Zonta ◽  
Julie A. Crawford ◽  
Andrea Leonardi
2019 ◽  
Vol 56 (6) ◽  
pp. 1389-1399 ◽  
Author(s):  
Nathalie Isabelle Chardon ◽  
Christian Rixen ◽  
Sonja Wipf ◽  
Daniel Forest Doak

Author(s):  
Ali Hameed Al-Badri

Appendicitis is a common and urgentsurgical illness with protean manifestations,generous overlap with other clinical syndromes,and significant morbidity,whichincreases with diagnostic delay. No single sign,symptom,or diagnostic test accurately confirms the diagnosis ofappendiceal inflammation in all cases. The surgeon's goals are to evaluate a relatively small population of patients referred for suspected appendicitis and to minimize the negative appendectomy rate without increasing the incidence of perforation. The emergency department clinician must evaluate the larger group of patients who present to the ED with abdominal pain of all etiologies with the goal of approaching 100% sensitivity for the diagnosis in a time-,cost-,and consultation-efficient manner.IN 1886Reginald fitz, pathologist 1st described the clinical condition of A.A.Fewyears laterCharles mcBurney describe the clinical finding ofA.A.55% of patients presented with classical symptom of A.A so complication occurbecauseof atypical presentation which due to variation in app. Position, age of patient & degree of inflammation.Migrating pain 80% sensitive and specific Vomiting 50% Nausea60 -90 %Anorexia 75 % Diarrhea18 % 32 % has similar attach 90 % RLQ tenderness Marklesign 74 %Dunphy's sign (sharp pain in the RLQ elicited by a voluntary cough) may be helpful in making the clinical diagnosis of localized peritonitis. Similarly,RLQ pain in response to percussion of a remote quadrant of the abdomen,or to firm percussion of the patient's heel,suggests peritoneal Inflammation


2020 ◽  
Vol 15 (6) ◽  
pp. 482-491 ◽  
Author(s):  
Milena Kostadinova ◽  
Milena Mourdjeva

Mesenchymal stem/stromal cells (MSCs) are localized throughout the adult body as a small population in the stroma of the tissue concerned. In injury, tissue damage, or tumor formation, they are activated and leave their niche to migrate to the site of injury, where they release a plethora of growth factors, cytokines, and other bioactive molecules. With the accumulation of data about the interaction between MSCs and tumor cells, the dualistic role of MSCs remains unclear. However, a large number of studies have demonstrated the natural anti-tumor properties inherent in MSCs, so this is the basis for intensive research for new methods using MSCs as a tool to suppress cancer cell development. This review focuses specifically on advanced approaches in modifying MSCs to become a powerful, precision- targeted tool for killing cancer cells, but not normal healthy cells. Suppression of tumor growth by MSCs can be accomplished by inducing apoptosis or cell cycle arrest, suppressing tumor angiogenesis, or blocking mechanisms mediating metastasis. In addition, the chemosensitivity of cancer cells may be increased so that the dose of the chemotherapeutic agent used could be significantly reduced.


NASPA Journal ◽  
2004 ◽  
Vol 41 (2) ◽  
Author(s):  
Phyllis McCluskey-Titus ◽  
Tony W. Cawthon

A research study was conducted using the small population of current graduate preparation faculty who were both NASPA members and former student affairs practitioners (n=38). The purpose of this study was to discover the benefits and challenges faced by practitioners when moving from an administrative position to a full-time faculty position in a student personnel preparation program. The following subjects were considered in this study: factors respondents considered when moving to a full-time faculty position, challenges respondents encountered in making the career change, differences between former administrative positions and current faculty positions, and type of preparation respondents reported were necessary for success in a faculty role. Some of the positive differences respondents described included: control over their quality of life, the ability to focus on teaching and research, and the ability to contribute to the profession. Certain challenges were recounted by respondents such as adjusting to the faculty culture and work expectations, development of a research agenda, having fewer resources as a full-time faculty member, and a difference in quality and nature of relationships.


Public Voices ◽  
2017 ◽  
Vol 5 (3) ◽  
pp. 3
Author(s):  
Mark Peterson

"Distance education" at the college level is well over a century old.  It has served the needs of a numerically large, but proportionately small population of learners who have eschewed the campus classroom.  These correspondence school enrollees, educational TV watchers, and audiocassette listeners have had only modest impact on the structure, mission, and strategy of the institutions serving them.  But that is now changing, and changing very dramatically.  The advent of the Internet, interactive television technology, and web-based instructional software, coupled with administrative and political perceptions of educational reformation and fiscal efficiency, may be causing nothing less than a revolution in higher education.  By applying a feminist model of assessment called "unthinking technology," that is to say, exploring the potential, but unthought of socio-political aspects of this technological revolution, this paper raises significant questions about the security of the traditional academic enterprise.  "The Politics of Distance Education" urges a pro-active embrace of these technologies by the academy in order to enable a legitimate "competency for grievance" so that the protection of the validity of higher education, and legitimacy of the academic profession can be ethically defended and publicly respected, rather than being viewed as mulish resistance to the inevitable.


Author(s):  
Richard Frankham ◽  
Jonathan D. Ballou ◽  
Katherine Ralls ◽  
Mark D. B. Eldridge ◽  
Michele R. Dudash ◽  
...  

Genetic management of fragmented populations involves the application of evolutionary genetic theory and knowledge to alleviate problems due to inbreeding and loss of genetic diversity in small population fragments. Populations evolve through the effects of mutation, natural selection, chance (genetic drift) and gene flow (migration). Large outbreeding, sexually reproducing populations typically contain substantial genetic diversity, while small populations typically contain reduced levels. Genetic impacts of small population size on inbreeding, loss of genetic diversity and population differentiation are determined by the genetically effective population size, which is usually much smaller than the number of individuals.


Author(s):  
Matthew C. Fitzpatrick ◽  
Aaron M. Ellison

Climatic change likely will exacerbate current threats to carnivorous plants. However, estimating the severity of climatic change is challenged by the unique ecology of carnivorous plants, including habitat specialization, dispersal limitation, small ranges, and small population sizes. We discuss and apply methods for modeling species distributions to overcome these challenges and quantify the vulnerability of carnivorous plants to rapid climatic change. Results suggest that climatic change will reduce habitat suitability for most carnivorous plants. Models also project increases in habitat suitability for many species, but the extent to which these increases may offset habitat losses will depend on whether individuals can disperse to and establish in newly suitable habitats outside of their current distribution. Reducing existing stressors and protecting habitats where numerous carnivorous plant species occur may ameliorate impacts of climatic change on this unique group of plants.


Author(s):  
Donald DeVito ◽  
Gertrude Bien-Aime ◽  
Hannah Ehrli ◽  
Jamie Schumacher

Haiti has experienced a series of catastrophic natural disasters in recent decades, resulting in significant loss of life and long-term damage to infrastructure. One critical outcome of these disasters is that there are approximately 400,000 orphans in the small population of just over 10 million. Throughout Haiti, children with disabilities are often considered cursed, and thus are rejected by the community in which they live. Haitian children with disabilities need creative and educational activities that will help them grow, develop, enjoy their lives, and become accepted members of the community. This chapter on the Haitian Center for Inclusive Education presents a case study of social media engagement and music learning, with an emphasis on social justice that has contributed to sustainable efforts.


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