Hibiscus elatus (blue mahoe).

Author(s):  
Julissa Rojas-Sandoval

Abstract The Caribbean tree H. elatus, known as blue mahoe or majagua, is a highly valued, fast-growing timber species that has adapted to a wide range of sites and is often used in reforestation. It produces excellent timber for high-grade furniture, but can also be used as a windbreak. Ease of germination results in successful plantation establishment. It could be grown on a larger scale as a plantation crop but suffers from epicormic branching and sweep. H. elatus is also grown for ornamental and shade purposes and is the national tree of Jamaica.

Author(s):  
Daina Ramey Berry ◽  
Nakia D. Parker

This chapter analyzes the lives of enslaved women in the nineteenth-century United States and the Caribbean, an era characterized by the massive expansion of the institution of chattel slavery. Framing the discussion through the themes of labor, commodification, sexuality, and resistance, this chapter highlights the wide range of lived experiences of enslaved women in the Atlantic World. Enslaved women’s productive and reproductive labor fueled the global machinery of capitalism and the market economy. Although enslaved women endured the constant exploitation and commodification of their bodies, many actively resisted their enslavement and carved out supportive and sustaining familial, marital, and kinship bonds. In addition, this essay explains how white, native, and black women could be complicit in the perpetuation of chattel slavery as enslavers and slave traders. Considering women in their roles as the oppressed and the oppressors contributes and expands historical understandings of gender and sexuality in relation to slavery.


2021 ◽  
Vol 11 (14) ◽  
pp. 6445
Author(s):  
David Ibarra ◽  
Raquel Martín-Sampedro ◽  
Bernd Wicklein ◽  
Úrsula Fillat ◽  
María E. Eugenio

Motivated by the negative impact of fossil fuel consumption on the environment, the need arises to produce materials and energy from renewable sources. Cellulose, the main biopolymer on Earth, plays a key role in this context, serving as a platform for the development of biofuels, chemicals and novel materials. Among the latter, micro- and nanocellulose have been receiving increasing attention in the last few years. Their many attractive properties, i.e., thermal stability, high mechanical resistance, barrier properties, lightweight, optical transparency and ease of chemical modification, allow their use in a wide range of applications, such as paper or polymer reinforcement, packaging, construction, membranes, bioplastics, bioengineering, optics and electronics. In view of the increasing demand for traditional wood pulp (e.g., obtained from eucalypt, birch, pine, spruce) for micro/nanocellulose production, dedicated crops and agricultural residues can be interesting as raw materials for this purpose. This work aims at achieving microfibrillated cellulose production from fast-growing poplar and olive tree pruning using physical pretreatment (PFI refining) before the microfibrillation stage. Both raw materials yielded microfibrillated cellulose with similar properties to that obtained from a commercial industrial eucalypt pulp, producing films with high mechanical properties and low wettability. According to these properties, different applications for cellulose microfibers suspensions and films are discussed.


Metabolites ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 133
Author(s):  
Artem D. Rogachev ◽  
Nikolay A. Alemasov ◽  
Vladimir A. Ivanisenko ◽  
Nikita V. Ivanisenko ◽  
Evgeniy V. Gaisler ◽  
...  

This work compares the metabolic profiles of plasma and the cerebrospinal fluid (CSF) of the patients with high-grade (III and IV) gliomas and the conditionally healthy controls using the wide-range targeted screening of low molecular metabolites by HPLC-MS/MS. The obtained data were analyzed using robust linear regression with Huber’s M-estimates, and a number of metabolites with correlated content in plasma and CSF was identified. The statistical analysis shows a significant correlation of metabolite content in plasma and CSF samples for the majority of metabolites. Several metabolites were shown to have high correlation in the control samples, but not in the glioma patients. This can be due to the specific metabolic processes in the glioma patients or to the damaged integrity of blood-brain barrier. The results of our study may be useful for the understanding of molecular mechanisms underlying the development of gliomas, as well as for the search of potential biomarkers for the minimally invasive diagnostic procedures of gliomas.


2016 ◽  
Vol 21 (2) ◽  
pp. 365-377
Author(s):  
Luis Eduardo Rojas Murcia ◽  
Juan E. Carvajal Cogollo ◽  
Javier Alejandro Cabrejo Bello

<p>Con el fin de caracterizar la distribución horizontal (repartición de los hábitats) y la utilización del recurso alimentario (tipo y tamaño de las presas) del ensamblaje de reptiles del bosque seco estacional al norte de la región Caribe de Colombia, en el departamento del Cesar, se realizaron cinco salidas de campo con una duración de doce días cada una. Los muestreos se realizaron en jornadas diurnas y nocturnas, en un diseño de transectos replicados a lo largo de diferentes hábitats que incluyeron: pastizales, bordes e interiores de bosque. Se realizaron análisis descriptivos de uso de hábitat en un perfil de vegetación por cada época climática y análisis de amplitud y sobreposición de nicho. Se registraron 38 especies de 14 familias del orden Squamata. Las especies se distribuyeron de manera homogénea entre zonas abiertas y boscosas. Se encontraron registros de 31 categorías de presa en 109 estómagos de seis especies de serpientes (61 estómagos) y siete de lagartos (48 estómagos) con un porcentaje de estómagos vacíos de 38 %. Las presas de mayor importancia para los lagartos fueron Coleoptera y Araneae, y para las serpientes fueron los anfibios. La mayoría de las especies presentaron un amplio espectro de dieta y entre especies similares, como entre Anolis auratus y A. gaigei, se presentó uso de recursos similares. En síntesis, el ensamblaje de reptiles presentó una distribución homogénea en los hábitats evaluados (áreas abiertas y boscosas) y el recurso alimentario fue variado entre las diferentes especies; la estacionalidad de la zona presenta un papel fundamental en la estructura del ensamblaje de reptiles, presentándose menos abundancia durante la época seca, tanto en las áreas abiertas como en las boscosas.</p><p><strong>Reptiles from the Seasonal Dry Forest the Caribbean Region: Distribution of Habitat and use of Food Resource</strong></p><p><strong>ABSTRACT</strong></p><p>We assessed the horizontal distribution and use of the food resource of the reptile’s assemblage of the seasonal tropical dry forest in the North of the Caribbean region of Colombia, department of Cesar. Five fieldtrips of 12 days each were performed, sampling was diurnal and nocturnal, following a transect design replicated along different habitats including grasslands, edge and interior of forest. We performed descriptive analyzes of habitat use, using a profile of vegetation by each climatic period; we also did an analysis of amplitude and niche overlap. We recorded 38 species of 14 families of the Squamata order. Species distributed evenly between open and forested areas. Record of 31 categories of prey in 109 stomachs of six species snakes (61 stomachs) and seven of lizards (48 stomachs) with a percentage of empty stomachs of 38 % was found. The preys of greater importance for the lizards were Coleoptera and Araneae and for snakes, amphibians. Most of the species presented a wide range of diet and between similar species, such as Anolis auratus and A. gaigei, found a similar use of resources. In summary, the assembly of reptiles presented a homogeneous distribution in the habitats evaluated (forested and open areas) and the food resource varied among the different species; the seasonality of the area plays a fundamental role on the structure of this reptile assembly with less abundance during the dry season in both, open and forested habitats.</p>


Author(s):  
Raquel Pinto ◽  
André Cardoso ◽  
Sara Ribeiro ◽  
Carlos Brandão ◽  
João Gaspar ◽  
...  

Microelectromechanical Systems (MEMS) are a fast growing technology for sensor and actuator miniaturization finding more and more commercial opportunities by having an important role in the field of Internet of Things (IoT). On the same note, Fan-out Wafer Level Packaging (FOWLP), namely WLFO technology of NANIUM, which is based on Infineon/ Intel eWLB technology, is also finding further applications, not only due to its high performance, low cost, high flexibility, but also due to its versatility to allow the integration of different types of components in the same small form-factor package. Despite its great potential it is still off limits to the more sensitive components as micro-mechanical devices and some type of sensors, which are vulnerable to temperature and pressure. In the interest of increasing FOWLP versatility and enabling the integration of MEMS, new methods of assembling and processing are continuously searched for. Dielectrics currently used for redistribution layer construction need to be cured at temperatures above 200°C, making it one of the major boundary for low temperature processing. In addition, in order to accomplish a wide range of dielectric thicknesses in the same package it is often necessary to stack very different types of dielectrics with impact on bill of materials complexity and cost. In this work, done in cooperation with the International Iberian Nanotechnology Laboratory (INL), we describe the implementation of commercially available SU-8 photoresist as a structural material in FOWLP, allowing lower processing temperature and reduced internal package stress, thus enabling the integration of components such as MEMS/MOEMS, magneto-resistive devices and micro-batteries. While SU-8 photoresist was first designed for the microelectronics industry, it is currently highly used in the fabrication of microfluidics as well as microelectromechanical systems (MEMS) and BIO-MEMS due to its high biocompatibility and wide range of available thicknesses in the same product family. Its good thermal and chemical resistance and also mechanical and rheological properties, make it suitable to be used as a structural material, and moreover it cures at 150°C, which is key for the applications targeted. Unprecedentedly, SU-8 photoresist is tested in this work as a structural dielectric for the redistribution layers on 300mm fan-out wafers. Main concerns during the evaluation of the new WLFO dielectric focused on processability quality; adhesion to multi-material substrate and metals (copper, aluminium, gold, ¦); between layers of very different thicknesses; and overall reliability. During preliminary runs, processability on 300 mm fan-out wafers was evaluated by testing different coating and soft bake conditions, exposure settings, post-exposure parameters, up to developing setup. The outputs are not only on process conditions and results but also on WLFO design rules. For the first time, a set of conditions has been defined that allows processing SU-8 on WLFO, with thickness values ranging from 1 um to 150 um. The introduction of SU-8 in WLFO is a breakthrough in this fast-growing advanced packaging technology platform as it opens vast opportunities for sensor integration in WLP technology.


Author(s):  
Sadie J. Ryan ◽  
Catherine A. Lippi ◽  
Kevin L. Bardosh ◽  
Erika F. Frydenlund ◽  
Holly D. Gaff ◽  
...  

Vector borne diseases (VBDs) are often seen by the highly developed nations of the world as an issue of poor tropical countries. While framing the problem this way—through the paradigm of a poverty-trap—may leverage aid and motivate political will toward disease control, it misses a wide range of socio-political contexts both driving, and driven by, vector borne diseases. In this chapter, we present a series of global vignettes, to illustrate different facets of the broad remit of social drivers and interactions with VBDs. We approach the urban social-ecological context in Latin America and the Caribbean, impacts and aftermath of natural disasters such as earthquakes and tropical storms, struggles with trust in intervention implementation in Haiti, and drivers and impacts of ruminant arbovirus emergence events in Europe. We conclude that incorporating an understanding of social context, including political history and cultural perceptions, is a key part of VBD research and intervention practice.


PLoS ONE ◽  
2011 ◽  
Vol 6 (10) ◽  
pp. e25493 ◽  
Author(s):  
Agustín Ciapponi ◽  
Ariel Bardach ◽  
Demián Glujovsky ◽  
Luz Gibbons ◽  
María Alejandra Picconi

Author(s):  
Peter Lehr

Until rather recently, piracy as a form of seaborne organized crime seemed to be a phenomenon of the past—something that was relegated to a great number of books, some comics, and, of course, the silver screen: many Hollywood blockbusters revolve around pirates as larger-than-life swashbuckling characters, played for example by Douglas Fairbanks (The Black Pirate, 1926), Errol Flynn (Captain Blood, 1935), Yul Brynner (The Buccaneer, 1958), or Johnny Depp (Pirates of the Caribbean franchise, 2003 onward). Even the Muppets had a (comedy) go at pirates with Muppets Treasure Island (1996). That “real” pirates still exist and pose a formidable danger to seafarers at least in some parts of the world was known only to a small group of people outside the mariner community such as legal experts and some scholars, mainly from history departments. This blissful ignorance was swept away by the advent of Somali piracy between 2005 and 2008: suddenly, “real” pirates made headlines again, sparking a renewed interest in all things pirate, modern or not. It also resulted in a wave of publications focusing on modern pirates, trying to make sense out of why this age-old menace had returned with a vengeance. Even for specialists, this burgeoning literature, ranging from books aimed at the wider public and offering general overviews to very specialized research articles appealing to equally specialized audiences, it is difficult to keep track. This bibliography aims at referencing the leading works, in order to offer the reader a quick access to the vast repository of knowledge which is nowadays available. It will commence with general overviews, to then move to the most dangerous regional hot-spots of current piracy, which are West Africa (Gulf of Guinea), East Africa (Gulf of Aden and Somali Basin), and Southeast Asia (Straits of Malacca and Singapore plus South China Sea). Also, some secondary hot spots such as the Persian/Arabian Gulf and the Sundarbans at the bottom of the Bay of Bengal are referenced as well, although not much has been written about these manifestations of piracy. This is followed by works on root causes (why do people become pirates in modern times?), and works on modern pirates’ modus operandi, in particular their weapons and tactics (what do modern pirates do?). Finally, the focus will shift from piracy to counter-piracy at sea, on land, and at court—the latter part also including publications dealing with legal definitions of piracy such as included in the United Nations Law of the Sea Convention (LoSC). As regards the nature of the sources referenced, it should be noted that in order to reach out to a wide range of audiences, not only academic and scholarly publications are included, but also publications with a more journalistic approach that aim at the general public. Furthermore, great care was taken to include publications which are easily accessible—also for the benefit of a wider audience.


2020 ◽  
Vol 9 (3) ◽  
pp. 165
Author(s):  
Gregorio Rosario Michel ◽  
Santiago Muñoz Tapia ◽  
Fernando Manzano Aybar ◽  
Vladimir Guzmán Javier ◽  
Joep Crompvoets

In recent years, a growing number of stakeholders have been taking part in the generation and delivery of geospatial information and services to reduce the impact of severe natural disasters on the communities. This is mainly due to a huge demand for accurate, current and relevant knowledge about the impacted areas for a wide range of applications in risk-informed decision makings. The aim of this paper is to identify users’ requirements for emergency mapping team (EMT) operations in the Dominican Republic (DR). An online survey was applied to collect data from key users involved in the Inter-Institutional Geospatial Information Team in DR. Our findings suggest a set of users’ requirements for EMT operations: (1) standardization; (2) establishing and maintaining a spatial data infrastructure; (3) partnership; (4) effective communication among stakeholders; and (5) capacity building. A better understanding of the users’ requirements and the associated information workflows will lead to a superior level of readiness for EMT operations in DR. This knowledge will support future studies/practices at the local and national levels in the Caribbean region, which share similar challenges in terms of natural hazards and development issues.


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