Hydrogen sulfide (H2S) produced by commensal sulfate-reducing bacteria, which are often members of normal colonic microbiota, represents an environmental insult to the intestinal epithelium potentially contributing to chronic intestinal disorders that are dependent on gene-environment interactions. For example, epidemiologic studies reveal either persistent sulfate-reducing bacteria colonizatio...

Herein we present an unusual phosphine-free method to fabricate water soluble CdSeS nanocrystals in cubic structure. In this method, glycerin was used as a stabilizing agent replacing tri-n-octylphosphine oxide (TOPO). Water solution of Na2SeO3 in polyethylene glycol was utilized as Se source. 3-Mercaptopropionic acid (MPA) provides S source. The phosphine-free Se and S sources were found to be...

The Na atmosphere of I0 requires a Na-S-O phase in the outer surface layers. Considering the various mechanisms for extraction of Na to the surface, the possible primary phases are Na20, Na2S•, and Na2SO4. However, regardless of the primary phases brought o the surface, the shallow cruslal recycling of material implied by the ongoing volcanism will tend to produce thermochemical equilibrium and...

Water cadmium (Cd) pollution has widely aroused concerns due to high Cd toxicity in water bodies and its serious health risks humans. Adsorption been identified as an effective utilized technology for purification with heavy metal pollution. To develop a newly adsorbent of modified zeolite that can easily effectively purify Cd-polluted water, NaOH modification (JZ), high-temperature (HZ), humic...

The Spartina alterniflora invasion across the southeast coast in China significantly reduced vegetation diversity and generated associated ecological problems. Sulfur (S) is a vital nutrient, while sulfide phytotoxic impact of S. on soil S cycle remains unclear. Therefore, this study aims to investigate impacts microbial communities. Both field investigation lab-scale experiments were conducted...

Synthesis of large-scale, uniform, easily transferable, and highly crystalline monolayer (1L) molybdenum disulfide (MoS2) on different substrates is a challenge could decide its suitability for opto-electronic device applications. Herein, we report facile NaCl-assisted Chemical Vapor Deposition (CVD) synthesis high-quality MoS2 amorphous, layered substrates. Optical microscopy Raman spectroscop...

The use of enzymes for hair loosening in leather processing provides a cleaner option. However, there is need to improve the efficiency of these unit operations involving bioprocess by way of process intensification techniques, such as, the use of ultrasound. In this paper, the use of ultrasound has been studied in native enzyme papain (A) based hair-loosening system and compared with commercia...

Leaves of Catharanthus roseus (L) G. Don (72 kg) were collected from a field grown in the Karachi Uni­ versity campus. The crude alkaloids (134 g) obtained from the alcoholic extract of the air-dried leaves (24 kg) of the plant, were dissolved in chloroform (450 ml) and extracted with pH 3 phosphate buffer (1 1). The chloroform layer was dried (anhydrous Na2S 0 4), concentrated to 1/3 of its or...

We report Hubble Space Telescope optical to near-infrared transmission spectroscopy of the hot-Jupiter WASP-6b, measured with the Space Telescope Imaging Spectrograph and Spitzer’s InfraRed Array Camera. The resulting spectrum covers the range 0.29–4.5μm. We find evidence for modest stellar activity of WASP-6 and take it into account in the transmission spectrum. The overall main characteristic...