Crossed wires: diatom phosphate sensing mechanisms coordinate nitrogen metabolism.

Phytoplankton can encounter dynamic changes in their environment including fluctuating nutrient supply, and therefore require survival mechanisms to compete for such growth-limiting resources. Diatoms, single-celled eukaryotic microalgae, are typically first responders when crucial macronutrients phosphorus (P) and nitrogen (N) enter the marine environment and therefore must have tightly regulated nutrient sensory systems. While nutrient starvation responses have been described, comparatively little is known about diatom nutrient sensing mechanisms.

Cryptic bacterial pathogens of diatoms peak during senescence of a winter diatom bloom.

Diatoms are globally abundant microalgae that form extensive blooms in aquatic ecosystems. Certain bacteria behave antagonistically towards diatoms, killing or inhibiting their growth. Despite their crucial implications to diatom blooms and population health, knowledge of diatom antagonists in the environment is fundamentally lacking.

Exploring the onset of B -based mutualisms using a recently evolved Chlamydomonas auxotroph and B -producing bacteria.

Cobalamin (vitamin B ) is a cofactor for essential metabolic reactions in multiple eukaryotic taxa, including major primary producers such as algae, and yet only prokaryotes can produce it. Many bacteria can colonize the algal phycosphere, forming stable communities that gain preferential access to photosynthate and in return provide compounds such as B . Extended coexistence can then drive gene loss, leading to greater algal-bacterial interdependence.

A Novel Ca Signaling Pathway Coordinates Environmental Phosphorus Sensing and Nitrogen Metabolism in Marine Diatoms.

Diatoms are a diverse and globally important phytoplankton group, responsible for an estimated 20% of carbon fixation on Earth. They frequently form spatially extensive phytoplankton blooms, responding rapidly to increased availability of nutrients, including phosphorus (P) and nitrogen (N). Although it is well established that diatoms are common first responders to nutrient influxes in aquatic ecosystems, little is known of the sensory mechanisms that they employ for nutrient perception.

A Different Lens: Evaluating Quality of Care From the Consumer Perspective.

CMS continues to push on measuring and reporting information from the consumer perspective for Medicare Advantage and Part D contracts. Others will follow, and we can expect more emphasis on member-reported outcomes and experience measures across all lines of business.

Investigation of alleged health incidents associated with land application of sewage sludges.

The majority of U.S. sewage sludges are disposed by application to land for use as a soil amendment.

Organic chemicals in sewage sludges.

Sewage sludges are residues resulting from the treatment of wastewater released from various sources including homes, industries, medical facilities, street runoff and businesses. Sewage sludges contain nutrients and organic matter that can provide soil benefits and are widely used as soil amendments. They also, however, contain contaminants including metals, pathogens, and organic pollutants.

Risk perception, risk communication, and stakeholder involvement for biosolids management and research.

An individual's perception of risk develops from his or her values, beliefs, and experiences. Social scientists have identified factors that affect perceptions of risk, such as whether the risk is knowable (uncertainty), voluntary (can the individual control exposure?), and equitable (how fairly is the risk distributed?). There are measurable differences in how technical experts and citizen stakeholders define and assess risk.

Interdisciplinary development of a preconception health curriculum for four medical specialties.

A group of obstetricians and gynecologists, along with physicians from three other medical specialties, nurses, and midwives, developed a curriculum on preconception health care for women. This curriculum was specifically aimed at residents in obstetrics and gynecology, internal medicine, pediatrics, and family medicine. The curriculum was designed to convince these physicians that they needed to participate in promotion of preconception health for many reasons, such as the need to teach women to take folic acid daily because it significantly decreases the incidence of neural tube defects.