Kazuhide Hayakawa

ORCID: 0000-0001-9434-9729
Publications
Citations
Views
---
Saved
---
About
Contact & Profiles
Research Areas
  • Marine and coastal ecosystems
  • Aquatic Ecosystems and Phytoplankton Dynamics
  • Isotope Analysis in Ecology
  • Microbial Community Ecology and Physiology
  • Marine Biology and Ecology Research
  • Water Quality Monitoring and Analysis
  • Soil and Water Nutrient Dynamics
  • Environmental Chemistry and Analysis
  • Water Quality and Pollution Assessment
  • Geology and Paleoclimatology Research
  • Aquatic Ecosystems and Biodiversity
  • Groundwater and Isotope Geochemistry
  • Atmospheric chemistry and aerosols
  • Marine Bivalve and Aquaculture Studies
  • Algal biology and biofuel production
  • Metallurgy and Material Science
  • Biocrusts and Microbial Ecology
  • Toxic Organic Pollutants Impact
  • Adsorption, diffusion, and thermodynamic properties of materials
  • Fish Ecology and Management Studies
  • Analytical Chemistry and Chromatography
  • Aquatic Invertebrate Ecology and Behavior
  • Coral and Marine Ecosystems Studies
  • Pharmaceutical and Antibiotic Environmental Impacts
  • Hydrology and Watershed Management Studies

Massachusetts General Hospital
2025

Harvard University
2025

Lake Biwa Museum
2013-2024

Environmental Research Institute
2015-2023

Kyoto University of Advanced Science
2012

Shiga University
2012

Kyoto University
2010

Tokyo University of Agriculture and Technology
2010

National Fisheries University
2005

Rutgers, The State University of New Jersey
1977-2000

Laboratory studies are increasingly indicating that the quality of nutrient-limited algae is suboptimal for zooplankton production. However, little known about how affected by nutrient limitation phytoplankton in more natural situations. To test phosphorus (P) growth under realistic food conditions, we performed a set 5-d experiments using Daphnia dentifera and suspended particulate matter (seston) from three lakes at Experimental Lakes Area (Ontario, Canada). Neonate fed 6 h per day on...

10.1890/0012-9658(2001)082[0898:nlrfqf]2.0.co;2 article EN Ecology 2001-03-01

Abstract. Ocean acidification, a complex phenomenon that lowers seawater pH, is the net outcome of several contributions. They include dissolution increasing atmospheric CO2 adds up with dissolved inorganic carbon (dissolved CO2, H2CO3, HCO3−, and CO32−) generated upon mineralization primary producers (PP) organic matter (DOM). The aquatic processes leading to are substantially affected by increased DOM nutrients via terrestrial runoff, acidic rainfall, PP algal blooms, nitrification,...

10.5194/bg-13-1767-2016 article EN cc-by Biogeosciences 2016-03-23

This paper analyzes the various design parameters of thermal conductivity (k) probe and makes recommendations for applications nonfrozen food materials. The k is a simplified application line-heat source theory, but this simplification contributes to instrument error which can be minimized by paying particular attention size probes materials construction. As diameter decreases, its accuracy increases; however, small are difficult make. Therefore, it recommended that users their using highest...

10.1016/0260-8774(94)00088-3 article EN cc-by-nc-nd Journal of Food Engineering 1996-01-01

The dynamics of fluorescent dissolved organic matter (FDOM) in the large monomictic freshwater Lake Biwa (surface area 675 km 2 , maximum depth 104 m) was studied from December 2010 to 2011. protein‐like FDOM (FDOM T ) and carbon (DOC) showed epilimnetic accumulation 4.42 ± 0.22 quinine sulfate units [QSU] 6.30 0.04 QSU; DOC 80.8 2.7 µmol L −1 102.7 3.5 between nutrient‐replete winter mixing nutrient‐depleted stratified periods. This is attributed reduced heterotrophic activity following...

10.4319/lo.2013.58.6.2262 article EN Limnology and Oceanography 2013-11-01

10.1016/j.jphotobiol.2007.11.008 article EN Journal of Photochemistry and Photobiology B Biology 2008-01-23

Abstract. Ocean acidification, a complex phenomenon that lowers seawater pH, is the net outcome of several contributions. They include dissolution increasing atmospheric CO2 adds up with dissolved inorganic carbon (dissolved CO2, H2CO3, HCO3−, and CO32−) generated upon mineralization primary producers (PP) organic matter (DOM). The aquatic processes leading to are substantially affected by increased DOM nutrients via terrestrial runoff, acidic rainfall, PP algal blooms, nitrification,...

10.5194/bgd-12-10939-2015 preprint EN cc-by 2015-07-13

ABSTRACT: There are many dried foods of hollow cylinder‐shapes in the market. Hygrostress cracks form these during drying without a careful process control. The objective present work was to develop simulation method for heat and moisture transfer cylinder‐food coupled with hygrophysical changes. A modified Luikov's model used development together virtual minimization principle, critical tensile stress criterion crack formation, crack‐tip‐opening angle propagation. developed, computerized...

10.1111/j.1365-2621.2000.tb16000.x article EN Journal of Food Science 2000-03-01

The importance of diurnal stratification for the formation cyanobacterial blooms was examined using large enclosures (180 m 3 ) in a shallow bay Lake Biwa, Japan 1995 and 1997. Three different mixing regimes were set up: covered with transparent plastic sheet to prevent wind from causing turbulence water column loss heat radiation continuously stratified, those artificially mixed pumps each day disrupt never controls which stratified diurnally, Concentration dissolved inorganic nitrogen...

10.1127/archiv-hydrobiol/150/2001/491 article EN Fundamental and Applied Limnology / Archiv für Hydrobiologie 2001-01-20

To understand the behavior of fluorescent whitening agents (FWAs) in a lake environment, we measured quantities two FWAs, DSBP, and DAS1, water samples collected monthly from six depths column, sediment trap sample, core sample Lake Biwa, largest Japan, sewage, effluent, river lake's catchment. We conducted sunlight exposure experiment developed method to estimate degree photodegradation by using DSBP/DAS1 ratio environmental samples. The observed seasonal pattern vertical distributions FWAs...

10.1021/es100465v article EN Environmental Science & Technology 2010-09-01
Coming Soon ...