Emmanuel Pacheco Leaño

• PhD Environmental Technology
• Professor at Central Mindanao University-Institute of Biological Sciences

Substrate bioavailabity is one of the critical factors that determine the relative biohydrogen (bioH2) yield in fermentative hydrogen production and bioelectricity output in a microbial fuel cell (MFC). In the present undertaking, batch bioH2 production and MFC-based biolectricity generation from ultrasonically pretreated palm oil mill effluent (PO...

Batch production of biohydrogen from cassava wastewater pretreated with (i) sonication, (ii) OPTIMASH BG® (enzyme), and (iii) α-amylase (enzyme) were investigated using anaerobic seed sludge subjected to heat pretreatment at 105 °C for 90 min. Hydrogen yield at pH 7.0 for cassava wastewater pretreated with sonication for 45 min using anaerobic seed...

Despite herpetological surveys conducted in Mindanao, scanty data are known about the Philautus species in montane forests as well as its account in southern Mindanao. Species accounts of Philautus sampled from the montane forest of Marilog District in Southern Mindanao with notes on it microhabitats were provided. Belt-transect sampling and microh...

The genus Threciscus Bolívar, 1887 (Tetrigidae: Ophiotettigini) was a monotypic genus endemic for the Philippines and included only T. pugionatus (Stål, 1877). Here, after examination of series of specimens, we conclude that T. pugionatus is morphologically close to Spartolus tricostatus Bolívar, 1887 and we move the species back to the genus Spart...

Diotarus Stål, 1887 (Tetrigidae: Cladonotinae) is a genus of pygmy grasshoppers with four species, all of which are inhabiting the Philippines with one species known also from Sulawesi. Diotarus verrucifer Stål, 1877 was originally described from Semper's collection and from an unknown location from the Philippines. The species has been reported on...

The immune system plays an essential role in aging. Polygala fallax Hemsl. (PFH) enhances the immune response and promotes immune function. The study aimed to investigate whether PFH had a positive effect on the immune function of aging mice to delay aging. Kunming mice were selected to establish an aging mouse model by intraperitoneal injection of...

Abstract.The study was undertaken with the notion that pulse, as the smallest undividable unitof calling frogs/toads and a static variable, is a relevant parameter forspecies recognition,particularly pulse rates and number of pulses per call. Thus, would help shed light in thereassessment of the identity of theAnsoniaspecies complex. The pulse char...

Mount Apo Natural Park (MANP) is an important forest reserve in most part of Region XI and XII because of its watershed importance. However, the MANP may also threatened by habitat modification that may alter most of its water resource. Thus, this study was conducted to assess the abundance of freshwater fish and analyze the physico-chemical proper...

Butterflies are important biological and ecological indicators of a healthy environment. They also play a vital role in the pollination of many economically important farm crops and forest trees. The study provided a checklist of butterflies in Marilog District, its diversity and ecological and local status. A combination of belt transect and oppor...

ABSTRACT Marilog Forest Reserve is one of the priority areas on conservation by the conservation international as it is recognized as an important biodiversity area. It is known to its cold ambience, zero visibility fogs and big resorts built along the main road. Thus, the study was conducted to determine the diversity, ecological and conservation...

Study on physicochemical properties and freshwater fish was conducted in Lake Duminagat, a lone small crater lake of Mount Malindang Natural Park with a total area of 8.04 hectares. Temperature, pH, oxidation reduction potential (ORP), electrical conductivity, turbidity, dissolved oxygen (DO) and total dissolved solids of (TDS) were the water param...

Study on physicochemical properties and freshwater fish was conducted in Lake Duminagat, a lone small crater lake of Mount Malindang Natural Park with a total area of 8.04 hectares. Temperature, pH, oxidation reduction potential (ORP), electrical conductivity, turbidity, dissolved oxygen (DO) and total dissolved solids of (TDS) were the water param...

Healthy riverine systems provide ecological services that can be translated into human use and consumption. However, human activities cause environmental degradation limiting available pristine water supply and raising public health concerns. In the present study, four tributaries surrounding Mt. Matutum Protected Landscape (MMPL) were selected (Gl...

The utilization of environmental friendly coagulant is widened which can be proposed as an imperative option for water treatment. In this study, the efficiency of Chitosan, a natural organic coagulant in pre-treating Active Carbon Effluent (ACE) as alternative to conventional metal based coagulants in terms of Turbidity (T), Chemical Oxygen Demand...

When metal salts coagulants are used in wastewater treatment it may result in adverse effects for the receiving water body. Moreover, the sludge produced in the coagulation step may not be reused because of the presence of the metals, thus the necessity of a proper disposal will increase the management costs. Recently, the utilization of environmen...

Abstract The present paper is part of the rapid biodiversity assessment in Mainit Hot Spring Protected Landscape (MHSPL), Nabunturan, Compostela Valley Province Philippines within the months of December 2012 and February 2013. Transect walk survey or visual encounter, mist netting, and live trapping methods were employed to 5 sampling sites namely,...

When metal salts coagulants are used in wastewater treatment it may result in adverse effects for the receiving water body. Moreover, the sludge produced in the coagulation step may not be reused because of the presence of the metals, thus the necessity of a proper disposal will increase the management costs. Recently, the utilization of environmen...

Various pretreatment methods including heat have been conducted on the mixed inoculums to enrich hydrogen producing bacteria (HPB). This study investigated the use of heat as pretreatment method for the anaerobic sludge at 105oC ranging from 45, 60, 90 and 120 minutes to determine the optimum time to suppress methanogenic activity and enhance hydro...

Inventory and assessment of aquatic biodiversity were conducted in Alanib River in Mt. Kitanglad, Bukidnon, which is one of the Long Term Ecological Research (LTER) sites in Mindanao. The species richness and abundance of fishes, macroinvertebrates, plankton and also vascular plants in the riparian vegetation were evaluated in relation to the influ...

Batch production experiments on biohydrogen from Palm Oil Mill Effluent (POME) pretreated with (i) OPTIMASH BG® (enzyme) and (ii) Tween 80® (surfactant) were carried out using anaerobic seed sludge subjected to heat pretreatment at 105 °C for 90 min. Batch experiments were also conducted in a double chamber microbial fuel cell separated by a Proton...

In the framework of the 'Rapid Biodiversity Survey of Mainit Hot Spring Protected Landscape' by the Research and Development Center of Assumption College of Nabunturan an annotated lists of Bryophytes with 54 species representing 41 genera and 26 families and thirty (30) species of Lichens under 16 genera and 12 families were documented from nine s...

In this study, batch production of electricity using anaerobic sludge from a beverage factory subjected to heat pretreatment at 105°C for 90 minutes was investigated. Cassava wastewater with a COD value of 32,000 mg/L subjected to pretreatment with (i) sonication and (ii) α-amylase (enzyme) was used as a substrate. Experiments were conducted in a d...

A positive relationship between avifaunal distribution and vegetation may be interrupted by habitat disturbances as environmental stresses. Hence, general pattern of avifaunal distribution across elevational gradients was qualitatively characterized. Vegetation ranging from lowland, montane and mossy forest was explored for bird utilization. A comb...

We conducted a survey of the amphibians and reptiles found in lowland dipterocarp forest of the Philippines. We used line transect and visual encounter surveys to study eight sites located in dipterocarp, montane, and mossy forests. We found 15 reptiles (one order and six families) and nine amphibians (one order and five families). Endemicity in lo...

Mt. Hamiguitan Wildlife Sanctuary is identified as one of the biodiversity hotspots in Mindanao Faunal Region. To know the relative distribution of mammals in the area, transect survey, mist-netting and live-trapping of non-volant and volant mammals, respectively were conducted from July 2006 to March 2007 in different vegetative cover and elevatio...