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https://www.readbyqxmd.com/read/28319149/walking-and-talking-the-tree-of-life-why-and-how-to-teach-about-biodiversity
#1
Cissy J Ballen, Harry W Greene
Taxonomic details of diversity are an essential scaffolding for biology education, yet outdated methods for teaching the tree of life (TOL), as implied by textbook content and usage, are still commonly employed. Here, we show that the traditional approach only vaguely represents evolutionary relationships, fails to denote major events in the history of life, and relies heavily on memorizing near-meaningless taxonomic ranks. Conversely, a clade-based strategy-focused on common ancestry, monophyletic groups, and derived functional traits-is explicitly based on Darwin's "descent with modification," provides students with a rational system for organizing the details of biodiversity, and readily lends itself to active learning techniques...
March 2017: PLoS Biology
https://www.readbyqxmd.com/read/28315036/diagnosing-chronic-pancreatitis
#2
REVIEW
Ahmad Anaizi, Phil A Hart, Darwin L Conwell
Diagnosing CP can range from routine in those with severe disease and obvious calcifications on CT imaging to elusive in those patients with early changes in CP. The workup of suspected CP should follow a progressively noninvasive to more invasive STEP-wise approach in a patient with a suspicious clinical presentation and risk factors that raise their pretest probability of disease. After a thorough history and physical examination, basic laboratories should be obtained such as lipase, amylase, metabolic panel, and indirect PFTs (fecal elastase-1, serum trypsin)...
March 17, 2017: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/28303238/feasibility-of-a-peer-led-asthma-and-smoking-prevention-project-in-australian-schools-with-high-indigenous-youth
#3
Gabrielle B McCallum, Anne B Chang, Cate A Wilson, Helen L Petsky, Jan Saunders, Susan J Pizzutto, Siew Choo Su, Smita Shah
BACKGROUND: The high global burden of asthma and tobacco smoking among Indigenous people may potentially be reduced by appropriate interventions that target prevention of tobacco smoke uptake and improved asthma management. The latter includes targeted treatment based on airway inflammation. We undertook a feasibility study in two Darwin schools with a high proportion of Indigenous youth to determine the feasibility of an innovative, peer-led, school-based education program called the Asthma and Smoking Prevention Project (ASPP)...
2017: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/28296037/laboratory-risk-indicator-for-necrotizing-fasciitis-score-for-early-diagnosis-of-necrotizing-fasciitis-in-darwin
#4
Vignesh Narasimhan, Geraldine Ooi, Stephanie Weidlich, Phillip Carson
BACKGROUND: Soft tissue infections are a major health burden in the Top End of the Northern Territory of Australia. Necrotizing fasciitis (NF) is associated with mortality rates from 8 to 40%. Early recognition and aggressive surgical debridement are the cornerstones of successful treatment. The Laboratory Risk Indicator for Necrotizing Fasciitis (LRINEC) score, developed by Wong et al., uses six routine biochemical variables to aid early diagnosis. We aim to assess the diagnostic efficacy of the LRINEC score in our population...
March 15, 2017: ANZ Journal of Surgery
https://www.readbyqxmd.com/read/28288773/serological-detection-of-antibodies-to-anaplasma-spp-borrelia-burgdorferi-sensu-lato-and-ehrlichia-canis-and-of-dirofilaria-immitis-antigen-in-dogs-from-costa-rica
#5
Víctor M Montenegro, Marta C Bonilla, Darwin Kaminsky, Juan José Romero-Zúñiga, Susanne Siebert, Friederike Krämer
In a study in Costa Rica 314 serum samples from dogs throughout all seven provinces were tested using a commercial kit for the detection of circulating antibodies against Anaplasma spp., Borrelia burgdorferi sensu lato and Ehrlichia canis, and of circulating antigen of Dirofilaria immitis. A total of 6.4% (20/314) and 38.2% (120/314) were positive for Anaplasma spp. (An) and E. canis (Ec) antibodies. Overall, 8.0% (25/314) were positive for D. immitis (Di) antigen. One single dog reacted positive with B. burgdorferi s...
March 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28286093/needle-based-confocal-laser-endomicroscopy-for-the-diagnosis-of-pancreatic-cystic-lesions-an-international-external-interobserver-and-intraobserver-study-with-videos
#6
Somashekar G Krishna, William R Brugge, John M Dewitt, Pradermchai Kongkam, Bertrand Napoleon, Carlos Robles-Medranda, Damien Tan, Samer El-Dika, Sean McCarthy, Jon Walker, Mary E Dillhoff, Andrei Manilchuk, Carl Schmidt, Benjamin Swanson, Zarine K Shah, Phil A Hart, Darwin L Conwell
BACKGROUND AND AIMS: EUS-guided nCLE characteristics of common types of PCLs have been identified; however surgical histopathology was available in a minority of subjects. We sought to assess the performance characteristics of EUS-nCLE for differentiating mucinous from non-mucinous PCLs in a larger series of subjects with a definitive diagnosis. METHODS: Six endosonographers (nCLE experience >30 cases each) blinded to all clinical data, reviewed nCLE images of PCLs from 29 subjects with surgical (n=23) or clinical (n=6) correlation...
March 9, 2017: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/28285769/mutations-in-the-spliceosome-component-cwc27-cause-retinal-degeneration-with-or-without-additional-developmental-anomalies
#7
Mingchu Xu, Yajing Angela Xie, Hana Abouzeid, Christopher T Gordon, Alessia Fiorentino, Zixi Sun, Anna Lehman, Ihab S Osman, Rachayata Dharmat, Rosa Riveiro-Alvarez, Linda Bapst-Wicht, Darwin Babino, Gavin Arno, Virginia Busetto, Li Zhao, Hui Li, Miguel A Lopez-Martinez, Liliana F Azevedo, Laurence Hubert, Nikolas Pontikos, Aiden Eblimit, Isabel Lorda-Sanchez, Valeria Kheir, Vincent Plagnol, Myriam Oufadem, Zachry T Soens, Lizhu Yang, Christine Bole-Feysot, Rolph Pfundt, Nathalie Allaman-Pillet, Patrick Nitschké, Michael E Cheetham, Stanislas Lyonnet, Smriti A Agrawal, Huajin Li, Gaëtan Pinton, Michel Michaelides, Claude Besmond, Yumei Li, Zhisheng Yuan, Johannes von Lintig, Andrew R Webster, Hervé Le Hir, Peter Stoilov, Jeanne Amiel, Alison J Hardcastle, Carmen Ayuso, Ruifang Sui, Rui Chen, Rando Allikmets, Daniel F Schorderet
Pre-mRNA splicing factors play a fundamental role in regulating transcript diversity both temporally and spatially. Genetic defects in several spliceosome components have been linked to a set of non-overlapping spliceosomopathy phenotypes in humans, among which skeletal developmental defects and non-syndromic retinitis pigmentosa (RP) are frequent findings. Here we report that defects in spliceosome-associated protein CWC27 are associated with a spectrum of disease phenotypes ranging from isolated RP to severe syndromic forms...
March 6, 2017: American Journal of Human Genetics
https://www.readbyqxmd.com/read/28281169/complications-of-chronic-pancreatitis
#8
REVIEW
Mitchell L Ramsey, Darwin L Conwell, Phil A Hart
Chronic pancreatitis is a disease that leads to irreversible changes in the pancreatic morphology and function. The loss of function can lead to diabetes mellitus and exocrine pancreatic insufficiency. The inflammation and fibrosis can also lead to other complications including a chronic abdominal pain syndrome, metabolic bone disease, and pancretic cancer. This article reviews our current understanding of the mechanisms and management of these complications of chronic pancreatitis.
March 9, 2017: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/28272735/digest-old-world-climates-give-rise-to-young-lizard-skulls
#9
Amanda K Powers
Shared environmental pressures often give rise to the convergence of morphological characters in unrelated and geographically distinct species. Darwin (1859) wrote that "analogous variation" of traits in different organisms could be explained by similar influences or challenges in their environment. Convergence of traits can be driven by adaptive radiation when animals invade similar ecological feeding niches and consequently converge on similar morphologies, such as broader beak shape in seed-crushing species of Darwin's finches (Grant, 1999)...
March 8, 2017: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/28269440/novel-modular-2-dof-microsurgical-forceps-for-transoral-laser-microsurgeries-ergonomic-design-and-preliminary-evaluation
#10
Manish Chauhan, Giacinto Barresi, Nikhil Deshpande, Darwin G Caldwell, Leonardo S Mattos
Transoral Laser Microsurgeries (TLM) demand a great level of control and precision in intraoperative tissue manipulation. The optimal eradication of the diseased tissue is possible only with coordinated control of the laser aiming for incision and the microsurgical tools for orienting and stretching the tissue. However, the traditional microsurgical tools are long, single purpose, one degree-of-freedom (DOF), rigid tools with small range of motion and a normal grasping handle inducing non-ergonomic usage. This paper presents a novel, modular microsurgical tool to overcome the challenges of the traditional tools and improve the surgeon-tool usage experience...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269426/robot-assisted-microsurgical-forceps-with-haptic-feedback-for-transoral-laser-microsurgery
#11
Nikhil Deshpande, Manish Chauhan, Claudio Pacchierotti, Domenico Prattichizzo, Darwin G Caldwell, Leonardo S Mattos
In this paper, a novel, motorized, multi-degrees-of-freedom (DoF), microsurgical forceps tool is presented, which is based on a master-slave teleoperation architecture. The slave device is a 7-DoF manipulator with: (i) 6-DoF positioning and orientation, (ii) 1 open/close gripper DoF; and (iii) an integrated force/torque sensor for tissue grip-force measurement. The master device is a 7-DoF haptic interface which teleoperates the slave device, and provides haptic feedback in its gripper interface. The combination of the device and the surgeon interface replaces the manual, hand-held device providing easy-to-use and ergonomic tissue control, simplifying the surgical tasks...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268158/academic-pancreas-centers-of-excellence-guidance-from-a-multidisciplinary-chronic-pancreatitis-working-group-at-pancreasfest
#12
Sunil G Sheth, Darwin L Conwell, David C Whitcomb, Matthew Alsante, Michelle A Anderson, Jamie Barkin, Randall Brand, Gregory A Cote, Steven D Freedman, Andres Gelrud, Fred Gorelick, Linda S Lee, Katherine Morgan, Stephen Pandol, Vikesh K Singh, Dhiraj Yadav, C Mel Wilcox, Phil A Hart
Chronic pancreatitis (CP) is a progressive inflammatory disease, which leads to loss of pancreatic function and other disease-related morbidities. A group of academic physicians and scientists developed comprehensive guidance statements regarding the management of CP that include its epidemiology, diagnosis, medical treatment, surgical treatment, and screening. The statements were developed through literature review, deliberation, and consensus opinion. These statements were ultimately used to develop a conceptual framework for the multidisciplinary management of chronic pancreatitis referred to as an academic pancreas center of excellence (APCOE)...
February 28, 2017: Pancreatology: Official Journal of the International Association of Pancreatology (IAP) ... [et Al.]
https://www.readbyqxmd.com/read/28265984/methodological-advances-in-auxin-and-cytokinin-biology
#13
Andrej Hurný, Eva Benková
The history of auxin and cytokinin biology including the initial discoveries by father-son duo Charles Darwin and Francis Darwin (1880), and Gottlieb Haberlandt (1919) is a beautiful demonstration of unceasing continuity of research. Novel findings are integrated into existing hypotheses and models and deepen our understanding of biological principles. At the same time new questions are triggered and hand to hand with this new methodologies are developed to address these new challenges.
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28264306/a-cryptic-invasion-in-the-western-atlantic-presence-of-the-fouling-barnacle-i-megabalanus-i-zebra-darwin-1854-crustacea-cirripedia-in-the-caribbean-sea
#14
Fabio Bettini Pitombo, Judith Gobin, Nivia Maria Nunes Abreu, Alana Jute
The barnacle Megabalanus zebra is largely known from ship hulls, with little information on its biology, ecology, and natural range. We identify M. zebra here from the southern Caribbean, based upon specimens collected as early as 2002. Challenges associated with identifying megabalinine species have delayed recognition of this species as distinct from other Caribbean Megabalanus. Sequenced material of M. zebra from Curaçao did not match M. zebra GenBank sequences that could be verified by descriptions or vouchered material...
February 26, 2017: Zootaxa
https://www.readbyqxmd.com/read/28255893/surface-engineering-of-nanoparticles-to-create-synthetic-antibodies
#15
Linda Chio, Darwin Yang, Markita Landry
Surface engineering of nanoparticles has recently emerged as a promising technique for synthetic molecular recognition of biological analytes. In particular, the use of synthetic heteropolymers adsorbed onto the surface of a nanoparticle can yield selective detection of a molecular target. Synthetic molecular recognition has unique advantages in leveraging the photostability, versatility, and exceptional chemical stability of nanomaterials. In particular, single-walled carbon nanotubes (SWNT) exhibit a large Stokes shift and near infrared emission for maximum biological sample transparency...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28250807/the-darwin-cure-for-apiculture-natural-selection-and-managed-honeybee-health
#16
Peter Neumann, Tjeerd Blacquière
Recent major losses of managed honeybee, Apis mellifera, colonies at a global scale have resulted in a multitude of research efforts to identify the underlying mechanisms. Numerous factors acting singly and/or in combination have been identified, ranging from pathogens, over nutrition to pesticides. However, the role of apiculture in limiting natural selection has largely been ignored. This is unfortunate, because honeybees are more exposed to environmental stressors compared to other livestock and management can severely compromise bee health...
March 2017: Evolutionary Applications
https://www.readbyqxmd.com/read/28250182/vine-tendrils-use-contact-chemoreception-to-avoid-conspecific-leaves
#17
Yuya Fukano
Movement and growth habit of climbing plants have attracted attention since the time of Charles Darwin; however, there are no reports on whether plants can choose suitable hosts or avoid unsuitable ones based on chemoreception. Here, I show that the tendrils of Cayratia japonica (Vitaceae) appear to avoid conspecific leaves using contact chemoreception for oxalates, which are highly concentrated in C. japonica leaves. The coiling experiments show that C. japonica has a flexible plastic response to avoid coiling around conspecific leaves...
March 15, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28247258/making-heredity-matter-samuel-butler-s-idea-of-unconscious-memory
#18
Cristiano Turbil
Butler's idea of evolution was developed over the publication of four books, several articles and essays between 1863 and 1890. These publications, although never achieving the success expected by Butler, proposed a psychological elaboration of evolution (robustly enforced by Lamarck's philosophy), called 'unconscious memory'. This was strongly in contrast with the materialistic approach suggested by Darwin's natural selection. Starting with a historical introduction, this paper aspires to ascertain the logic, meaning and significance of Butler's idea of 'unconscious memory' in the post-Darwinian physiological and psychological Pan-European discussion...
February 28, 2017: Journal of the History of Biology
https://www.readbyqxmd.com/read/28244497/quality-of-life-in-chronic-pancreatitis-is-determined-by-constant-pain-disability-unemployment-current-smoking-and-associated-co-morbidities
#19
Jorge D Machicado, Stephen T Amann, Michelle A Anderson, Judah Abberbock, Stuart Sherman, Darwin L Conwell, Gregory A Cote, Vikesh K Singh, Michele D Lewis, Samer Alkaade, Bimaljit S Sandhu, Nalini M Guda, Thiruvengadam Muniraj, Gong Tang, John Baillie, Randall E Brand, Timothy B Gardner, Andres Gelrud, Christopher E Forsmark, Peter A Banks, Adam Slivka, C Mel Wilcox, David C Whitcomb, Dhiraj Yadav
OBJECTIVES: Chronic pancreatitis (CP) has a profound independent effect on quality of life (QOL). Our aim was to identify factors that impact the QOL in CP patients. METHODS: We used data on 1,024 CP patients enrolled in the three NAPS2 studies. Information on demographics, risk factors, co-morbidities, disease phenotype, and treatments was obtained from responses to structured questionnaires. Physical and mental component summary (PCS and MCS, respectively) scores generated using responses to the Short Form-12 (SF-12) survey were used to assess QOL at enrollment...
February 28, 2017: American Journal of Gastroenterology
https://www.readbyqxmd.com/read/28242737/unchanging-visions-the-effects-and-limitations-of-ocular-stillness
#20
REVIEW
Susana Martinez-Conde, Stephen L Macknik
Scientists have pondered the perceptual effects of ocular motion, and those of its counterpart, ocular stillness, for over 200 years. The unremitting 'trembling of the eye' that occurs even during gaze fixation was first noted by Jurin in 1738. In 1794, Erasmus Darwin documented that gaze fixation produces perceptual fading, a phenomenon rediscovered in 1804 by Ignaz Paul Vital Troxler. Studies in the twentieth century established that Jurin's 'eye trembling' consisted of three main types of 'fixational' eye movements, now called microsaccades (or fixational saccades), drifts and tremor...
April 19, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
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