A5102887517- Echinoderm biology and ecology
- Advanced Battery Materials and Technologies
- Marine Biology and Environmental Chemistry
- Marine and coastal plant biology
- Fuel Cells and Related Materials
- Marine Bivalve and Aquaculture Studies
- Conducting polymers and applications
- Advanced Battery Technologies Research
- Solid-state spectroscopy and crystallography
- Coral and Marine Ecosystems Studies
- Soil and Unsaturated Flow
- Marine Sponges and Natural Products
- Electrocatalysts for Energy Conversion
- Cephalopods and Marine Biology
- Advancements in Battery Materials
- Pharmaceutical and Antibiotic Environmental Impacts
- Water Quality and Resources Studies
- Polyamine Metabolism and Applications
- Layered Double Hydroxides Synthesis and Applications
- Chemical Thermodynamics and Molecular Structure
- Ocean Acidification Effects and Responses
- Ionic liquids properties and applications
- Synthesis and properties of polymers
- Aquatic Invertebrate Ecology and Behavior
- Aquaculture Nutrition and Growth
University of New Hampshire
2004-2021
Pennsylvania State University
2005-2020
United States Geological Survey
2013-2015
United States Department of the Interior
2014
DEVCOM Army Research Laboratory
1993-2006
Drexel University
2005
University of Pennsylvania
2005
Clinical Physiology Associates
1998
University of South Florida
1998
Saint Leo University
1998
Transcriptome and genome data from twenty stony coral species a selection of reference bilaterians were studied to elucidate evolutionary history. We identified genes that encode the proteins responsible for precipitation aggregation aragonite skeleton on which organisms live, revealed network environmental sensors coordinate responses host animals temperature, light, pH. Furthermore, we describe variety stress-related pathways, including apoptotic pathways allow detoxify reactive oxygen...
Transport properties of sulfonated poly(styrene-b-isobutylene-b-styrene) (S-SIBS) triblock copolymers were examined as a function ion-exchange capacity (IEC), specifically at high IECs (up to ∼2 mequiv/g). The proton conductivity S-SIBS was ∼1 order magnitude higher than polystyrene similar and 3-fold Nafion 117 an IEC 2 mequiv/g. However, all polymers in this study possessed selectivities (i.e., conductivity/methanol permeability) regardless chemistry or morphology. Small-angle X-ray...
Abstract Anticipated increases in precipitation intensity due to climate change may affect hydrological controls on soil N 2 O fluxes, resulting a feedback between and greenhouse gas emissions. We evaluated hydrologic emissions during experimental water table fluctuations large, intact columns amended with 100 kg ha −1 KNO 3 ‐N. Soil were collected from three landscape positions that vary biogeochemical properties ( = 12 columns). flooded bottom surface simulate are typical for this site,...
The ionic conductivity of a solid polymer electrolyte based on lithium salt dissolved in poly(ethylene oxide) (PEO) host was significantly improved with the use plasticizing agents. Either salt, solvent, or combinations both were incorporated into free‐standing solution‐cast films . greatest enhancement observed when and solvent (diethyl phthalate) combined, most notable improvement occurring below melting temperature PEO (≈66°C). Conductivity increased from at 20°C to addition plasticizers.
All echinoderms have unique hydraulic structures called tube feet, known for their roles in light sensitivity, respiration, chemoreception and locomotion. In the green sea urchin, most distal portion of these feet contain five ossicles arranged as a collector with its concave surface facing towards ambient light. These are perforated lined pigment cells that express PAX6 protein is universally involved development eyes sensory organs other bilaterians. Polymerase chain reaction (PCR)-based...
Here we characterize the germinal epithelia of both sexes Strongylocentrotus droebachiensis, green sea urchin, throughout its annual gametogenic cycle, using light and electron microscopy cytochemistry. In sexes, include two interacting cellular populations: nutritive phagocytes (NPs) germ cells. After spring spawning, NPs accumulate nutrients; amitotic oogonia often mitotic spermatogonia occur in clusters beneath NPs; subsequent stages are residual or absent. During summer, NP nutrients...
Abstract Sixty‐seven specimens of the common North Atlantic asteroid, Asterias vulgaris , were collected at seasonal intervals over a 2‐year period and their testes observed with both light electron microscopy. In germinal epithelium, predictable series interactions between versatile somatic cells is repeated annually in relation to sequential events spermatogenesis. For example, massive proliferation differentiation spermatogenic depend on elaboration thousands columns, which are distinct...
Summary Individuals of the sea star Asterias vulgaris from New Hampshire were maintained under two contrasting regimes seasonally changing photoperiod. In one regime lights turned on and off in phase with local sunrise sunset; other, daily photoperiod was kept 6 months out ambient photo- period. When dissected after being for 18 months, gametogenic condition out-of-phase animals found to be that in-phase animals. This experiment demonstrates photoperiodic regulation reproduction is important...
Somatic portions of gonads in two phanerozonian sea-stars, Ctenodiscus crispatus and Hippasteria phrygiana, were similar all aspects gross structure histology seen previously both forcipulate spinulosan asteroids. For the first time, detailed ultrastructural observations have been made cells tissues that reveal several features believed to be universal occurrence These include flagellated-collar visceral peritoneum other coelomically derived epithelia, muscular-flagellated-collar genital...
The results reported here provide a detailed account of the general morphology and histology male female gonads sea-star Asterias vulgaris. reproductive system this (normal five-rayed specimens) consists 10 separate units, each located proximally on lateral wall ray, one either side ray. Each unit is composed gonad, gonoduct, genital branches aboral haemal coelomic rings. gonad single bag-like structure with several protrusions (termed major minor acini) extending from its surface. Its two...