The filamentous phage fd was studied by both contact- and tapping-mode atomic force microscopy under conditions of controlled variations in relative humidity and changes in the applied tip force. By spin-coating freshly cleaved mica with phage containing solutions having very low salt content followed by rapid humidity control, stable and reliable sample preparation was achieved. The apparent h...

The relative humidity at the surface of a soil is calculated as a function of time from a realistic, exactly solvable model for unsaturated fluid flow. When the evaporation rate is constant, as in the atmosphere-controlled phase, the surface relative humidity suddenly drops at a particular time, even though the humidity–time function is differentiable. This sudden transition still occurs, but i...

The use of proteins and peptides as human therapeutics has been increased in recent years. Lipase is a relatively homogeneous proteinaceous enzyme indicated in maldigestion. The purpose of the present study was to evaluate the effect of humidity along with compactional pressure on the enzymatic activity of wheat germ lipase. Samples of lipase powder were kept at different relative humidity (RH)...

The effects of relative humidity and temperature on moisture sorption rate and stability profile of sodium bicarbonate powder exposed to various storage conditions were investigated using gravimetrical and acid-titration methods. In the study, samples were placed in desiccators, which contained various saturated salt solutions to generate desired levels of relative humidity, denoted as RH, rang...

[1] Simulations of warming climates with coupled climate models exhibit strong land-ocean contrasts in changes in surface temperature and relative humidity, but little land-ocean contrast in changes in equivalent potential temperature. A theory that assumes equal changes in equivalent potential temperature over land and ocean captures the simulated land-ocean warming contrast in the tropics if ...

Zhang et al. (2005) present a parameterization for what they term the "growth factor" of a sea salt aerosol particle relative to its formation diameter, which they assert "is a function of relative humidity alone" and independent of an arbitrary reference relative humidity. Here we note that this growth factor implicitly assumes an arbitrary reference relative humidity through the salinity of t...

In the course of investigating RNA metabolism in greening plastids of unexpanded leaves of jack bean (Canavalia ensiformis [L.] DC.) seedlings, it was found that relative humidity had to be controlled in order to obtain reproducible rates of chlorophyll accumulation and 'H-uracil incorporation into newly synthesized RNA. Under high relative humidity conditions, chlorophyll accumulation occurred...

BACKGROUND Nosocomial infections constitute a global health problem. OBJECTIVES To explore the relationship between nosocomial infection rates (NIRs) and climatic factors including temperature and relative humidity in Guangzhou area of China. METHODS 30892 patients in our hospital in 2009 were investigated for nosocomial infection status, and the contemporaneous temperature and relative hum...

An inkjet-printed relative humidity sensor based on capacitive changes which responds to different humidity levels in the environment is presented in this work. The inkjet-printed silver interdigitated electrodes configuration on the paper substrate allowed for the fabrication of a functional proof-of-concept of the relative humidity sensor, by using the paper itself as a sensing material. The ...

BACKGROUND Epidemiological studies investigating the role of fine particulate matter (PM2.5; aerodynamic diameter <2.5 μm) in triggering acute coronary events, including out-of-hospital cardiac arrests and ischemic heart disease (IHD), during wildfires have been inconclusive. METHODS AND RESULTS We examined the associations of out-of-hospital cardiac arrests, IHD, acute myocardial infarction,...