IPA Awardees for January 2012

Ceferino P. Maala and Elma F. Llanto
Department of Basic Veterinary Sciences
College of Veterinary Medicine
UP Los Baños

Histological and histochemical characterization of the lingual glands of the Philippine water buffalo, Bubalis bubalus (Linnaeus, 1758) (Artiodactyla: Bovidae). The Philippine Journal of Veterinary Medicine, 48 (2): 57-62, 2011

The microscopic anatomy and the reactions of the secretory units (acini) of the lingual glands of the Philippine water buffalo (carabao) were studied using Hematoxylin and Eosin (H & E), Humason’s mucicarmine, Periodic Acid Schiff (PAS), Alcian Blue (AB) pH 1.0 and 2.5 stained sections. The H & E stained sections were utilized for the description of the microscopic anatomy of the glands, while the special stains (Humason’s mucicarmine, PAS and AB pH 1.0 and 2.5) were used for the determination of the presence of mucin and for establishing types of mucopolysaccharides present in the secretory unit of the lingual glands. The results of the study showed that the microscopic anatomy of the lingual glands of the Philippine water buffalo was consistent with previous findings in other ruminants. The glands found in the lamina propria-submucosa and in between muscle bundle were made up of several lobules some of which were pure serous and pure mucous, others were mixed. No intercalated and striated ducts were observed. The reactions observed in PAS and AB pH 1.0 and 2.5 special stains revealed the presence of neutral, sulfated and weakly acidic polysaccharides. The importance of these polysaccharides is not yet understood. The observations in H & E, Humason’s mucicarmine, ABpH 1.0 and 2.5 stained sections showed that the lingual glands in the Philippine water buffalo are predominantly mucuous. The lingual together with the palatine, pharyngeal, labial and buccal glands belong to the minor salivary glands in the body. They contribute to about 10% of the total salivary secretions and as well as most of the mucus components of the saliva.

Link to the article http://journals.uplb.edu.ph/index.php/PJVM/article/view/659



Rose Ann B. Concepcion, Carla B. Dimalanta, Graciano P. Yumul and Decibel V. Faustino-Eslava
National Institute of Geological Sciences
College of Science
UP Diliman

Petrography, geochemistry, and tectonics of a rifted fragment of Mainland Asia: evidence from the Lasala Formation, Mindoro Island, Philippines. International Journal of Earth Sciences, 101 (1): 273-290, January 2012.

The Philippines is a melting pot of numerous ethnic groups. In terms of races, the Filipino blood sprung from a combination of various immigrants, traders and colonizers who came to the country. As diverse as its people, the Philippine archipelago is also composed of different geologic terranes. In present-day configuration, much of the eastern part of the Philippine belongs to the Philippine Mobile Belt, a seismically active region of island-arc affinity. On the other hand, the western part of the archipelago belongs to the continent-derived Palawan Continental Block, which is a relatively stable block that originated from the southeastern China. The two terranes collided sometime in the Miocene.

Numerous studies have suggested that the boundary of this arc-continent collision event can be traced across Romblon Island Group. within northwest Panay and along Mindoro island. However in previous studies, the boundary of this arc-continent collision across the latter remained uncertain. In our recent investigation of the petrographic features and whole rock geochemical compositions of the Lasala Formation observed in Northwest Mindoro, we are able to establish the whole of Mindoro island as part of Palawan Continental Block.

Link to the article: http://link.springer.com/article/10.1007/s00531-011-0643-5
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