Hu G.-X.,CAS Kunming Institute of Botany |
Hu G.-X.,University of Chinese Academy of Sciences |
Balangcod T.D.,University of the Philippines at Baguio |
Xiang C.-L.,CAS Kunming Institute of Botany
Biologia | Year: 2012
Trichome micromorphology of leaves and young stems of nine taxa (including four varieties) of Colquhounia were examined using light and scanning microscopy. Two basic types of trichomes were recognized: eglandular and glandular. Eglandular trichomes are subdivided into simple and branched trichomes. Based on the number of cells and trichome configuration, simple eglandular trichomes are further divided into four forms: unicellular, two-celled, three-celled and more than three-celled trichomes. Based on branching configuration, the branched eglandular trichomes can be separated into three forms: biramous, stellate and dendroid. Glandular trichomes can be divided into two subtypes: capitate and peltate glandular trichomes. Results from this study of morphological diversity of trichomes within Colquhounia lend insight into infrageneric classification and species relationships. Based on the presence of branched trichomes in C. elegans, this species should be transferred from Colquhounia sect. Simplicipili to sect. Colquhounia. We provide a taxonomic key to species of Chinese Colquhounia based on trichome morphology and other important morphological traits. © 2012 Versita Warsaw and Springer-Verlag Wien.
Peralta G.,University of the Philippines at Baguio |
Peralta G.,University of Graz |
Propst G.,University of Graz
ESAIM - Control, Optimisation and Calculus of Variations | Year: 2015
We consider a model describing the flow of a fluid inside an elastic tube that is connected to two tanks. We study the linearized system through semigroup theory. Controlling the pressures in the tanks renders a hyperbolic PDE with boundary control. The linearization induces a one-dimensional linear manifold of equilibria; when those are factored out, the corresponding semigroup is exponentially stable. The location of the eigenvalues in dependence on the viscosity is discussed. Exact boundary controllability of the system is achieved by the Riesz basis approach including generalized eigenvectors. A minimal time for controllability is given. The corresponding result for internal distributed control is stated. © EDP Sciences, SMAI 2015.
Jimenez E.C.,University of the Philippines at Baguio |
Jimenez E.C.,University of Utah |
Olivera B.M.,University of Utah
Peptides | Year: 2010
Six novel peptides from the piscivorous cone snail, Conus parius were purified by reverse-phase HPLC fractionation of crude venom. With the use of matrix-assisted laser desorption ionization mass spectrometry and standard Edman sequencing methods, the peptides were characterized. Two peptides were identified as members of the m-2 and m-4 branches of the M-superfamily and were designated as pr3a and pr3b, while four peptides were identified as members of the O-superfamily and were designated as pr6a, pr6b, pr6c and pr6d. Peptide pr3a differs from the majority of the M-superfamily peptides in the presence of two prolines, which are not modified to 4-trans-hydroxyproline. In peptide pr3b, five amino acids out of the 16 non-cysteine residues are identical with those of μ-GIIIA and μ-PIIIA, suggesting that pr3b may be a divergent μ-conotoxin. Peptide pr6a is notable because of its extreme hydrophobicity. Peptide pr6c has three prolines that are unhydroxylated. Peptides pr6b and pr6d differ from the previously characterized O-superfamily peptides in the presence of an extended N-terminus consisting of six amino acids. Peptides pr3a, pr3b, pr6a and pr6b were demonstrated to be biologically active when injected intraperitoneally in fish. The identification and characterization of these peptides in venom of a fish-hunting species establish the divergence of gene products and their patterns of post-translational modification within superfamilies in a single Conus species. © 2010 Elsevier Inc. All rights reserved.
Sta Maria C.F.L.,University of the Philippines at Baguio
International Journal of Social Ecology and Sustainable Development | Year: 2014
"Locating ourselves in the center of en masse urbanization⋯." Matnog, Sorsogon, Philippines, primarily a coastal area is not exempted from this socio-cultural shift. And in these changes, people, specifically that of the eight Girls, ages 14 to 18 years old living in the periphery of the coast, begin to question this condition of urbanization that has only created varied and severe strands of poverty in their area. "I look at their photographs and listen to their narrative⋯." Using Alice McIntyre's photovoice, the Girls took photographs of spaces that represent the concepts of poverty and development. I let them speak of these spaces and they begin to talk about "development" and "poverty," focusing on the existence of the Pier, the Coast and that of their lives. "Spatiality of the Pier⋯." Taking the postmodern lens, guided by Edward Soja's notions on spatiality is an attempt to view the unfolding of tensions emanating from urban spaces and their representations. The Pier and that of other spaces become the discursive arena that conjugate non-recognition of positions and conditions between the concepts of "poverty" and "development." With the Pier as the most imposing space emerges ambiguity and blurry vision affect how the Girls perceive, conceive and live in and along these spaces. Development as assumed to be an existing and workable paradigm through urbanization promise alteration of their condition does not exist for them. What happens is that "poverty" becomes the constant wherein time and space are in crisis; and, the spatiality of the Girls becomes fragmented and pulverized. "IT": For urbanization as a development agenda does not fulfill its promise to the Girls of Matnog, Sorsogon and to us. This knowledge as conceptualized for them place them in a position and state where they no longer recognize what development is. In this discourse, development, urbanization and spaces that represent them all becomes (in)visible that have become (un)recognizable and (un)familiar for the Girls and for us. This (non)recognition place all these concepts and spaces as an IT. Copyright © 2014, IGI Global.
Nolasco-Javier D.,University of New England of Australia |
Nolasco-Javier D.,University of the Philippines at Baguio |
Kumar L.,University of New England of Australia |
Tengonciang A.M.P.,Earthprobe Incorporated
Natural Hazards | Year: 2015
Among the most landslide prone in the Philippines is the Baguio district, a center of trade, commerce, education and governance. It also has the highest recorded rainfall in the country. Rainfall-induced landslides (RILs) occur yearly and are triggered by rainfall due to southwest monsoon, tropical cyclones and their interactions; and orographic lifting by the Cordillera mountain range. Both natural and human factors contribute to the region’s susceptibility to RIL. Fatalities can reach hundreds, and economic damages may reach billions of dollars per event. The rainfall and reported RIL occurrence were compiled for the period 2000–2013. The characteristics and impact of major RIL such as those instigated by Typhoon Parma in October 2009 are highlighted. Most landslides were associated with tropical cyclones, enhanced monsoon flow and 24-h rainfall that ranged from 73 to 1086 mm, corresponding to average rainfall rates of 3–45 mm per hour. The number of daily-reported landslide incidents ranged from 1 to 41. Slides, debris flows and earth flows were observed as the predominant types. As the observed landslide-triggering rainfall is below or within the range of the observed yearly maximum 24-h rainfall, which is 164–1086 mm, RIL will likely continue to occur annually and pose a major challenge for Baguio. The minimum of 70-mm daily rainfall may serve as a threshold for early landslide advisory. Given the limited number of landslides and analysis of landslide occurrence in relation to other controlling/predisposing factors undertaken, the threshold identified can only be regarded as indicative. © 2015, Springer Science+Business Media Dordrecht.