Bacterium-bacterium interactions occur at intimate spatial scales on the order of micrometers, but our knowledge of interactions at this level is rudimentary. Antagonism is a potential interaction in such microenvironments. To study the ecological role of antibiosis, we developed a model system involving an antibiotic-producing isolate (SWAT5) derived from a marine particle and its dominant ant...

We analyzed the abundance of mesozooplankton and suspended particulate matter across the deep-water “A-Front” in the southern sector of the California Current System. We characterized the A-Front with two novel devices, a free-fall Moving Vessel Profiler (MVP) and an Underwater Vision Profiler 5 (UVP5), together with quantitative bongo samples analyzed by ZooScan. The MVP permitted real-time vi...

Ultrafast particle and cell concentration is essential to the success of subsequent analytical procedures and the development of miniaturized biological and chemical sensors. Here, surface acoustic wave (SAW) devices were used to excite a MHz-order acoustic wave that propagates into a microlitre droplet to drive spatial concentration and separation of two different sized suspended microparticle...

As part of the U.S. JGOFS EqPac process study beam c profiles were obtained during two time-series occupations of the equator at 14o”W (‘IT008 and lTO12). CTD/transmissometer profiles were routinely performed three times a day, roughly at dawn, noon, and just prior to sunset. Additionally, ‘die1 experiment’ days of intensive profiling (every 3 h) were conducted twice during lTUO8 and three time...

Maritime advances during recent years have shown the importance of and the need for development of ultrasonic methods for the investigation of the transport of suspended marine sediments in rivers and in coastal regions. Two main acoustical procedures have been developed and used for the investigations of suspended sediment qualities during the laboratory studies, (1) high frequency resonance b...

The paper presents an overview of recent publications on the fluvial suspended sediment flux to the Arctic Ocean. The total suspended matter exported from the Russian territory is 102×10 t/year and from the Canadian Arctic is 125×10 t/year. The total suspended matter (TSM) flux to the Arctic (227×10 t/year) is very low, only about 1% of the global flux. Mean concentrations of suspended matter a...

Vehicular exhaust mainly consisting particulate matter sometimes called black carbon pollution is a mixture of solid and liquid components that form tiny particles that float in the air as a result of combustion of fuel. The aim of this study is to evaluate the effect of respirable suspended particulate matter (RSPM/PM10) on the automated count (WBC, TLC, DLC, ESR) and lipid profile (S. Cholest...

Total suspended matter is an important water quality parameter, and plays a key role in water quality evaluation, especially of inland waters. Many different methods have been developed to estimate TSM from remote sensing data, in which empirical methods and model-based methods are two types of commonly used methods. Compared with empirical methods, model-based methods have the advantages of de...