34 Because of the tradition of using honey as an antimicrobial medicament, we investigated 35 the effect of natural honey (NH) on Streptococcus mutans growth, viability and biofilm 36 formation compared to an artificial honey (AH). AH contained the sugars at the concentrations 37 reported for NH. NH and AH concentrations were obtained by serial dilution with tryptic soy 38 broth (TSB). Several ...

Aquaporin (AQP)8-facilitated transport of NH(3) has been suggested recently by increased NH(3) permeability in Xenopus oocytes and yeast expressing human or rat AQP8. We tested the proposed roles of AQP8-facilitated NH(3) transport in mammalian physiology by comparative phenotype studies in wild-type vs. AQP8-null mice. AQP8-facilitated NH(3) transport was confirmed in mammalian cell cultures e...

NH(4)(+) transport by the distal nephron and NH(4)(+) detoxification by the liver are critical for achieving regulation of acid-base balance and to avoid hyperammonemic hepatic encephalopathy, respectively. Therefore, it has been proposed that rhesus type B glycoprotein (Rhbg), a member of the Mep/Amt/Rh NH(3) channel superfamily, may be involved in some forms of distal tubular acidosis and con...

Photosynthesis, primary productivity, N content, and N(2) fixation were determined as a function of applied NH(4) (+) in peas (Pisum sativum L. cv. Alaska) which were inoculated or not inoculated with Rhizobium leguminosarum. Cabon dioxide exchange rate (CER) increased 10-fold, total N content 7-fold, and total dry weight 3-fold in 26-day-old uninoculated plants as applied NH(4) (+) was increas...

Nowadays metal-organic frameworks with multiple luminescent centers are very fascinating as multifunctional luminescent material because of their luminescence properties, which could be systematically tuned by deliberate use of organic ligands and metal ions. In this research, we explored a microporous mixed-ligand MOF for highly selective and sensitive detection of metal ions. A two-fold inter...

The disruption of K(+) transport and accumulation is symptomatic of NH(4)(+) toxicity in plants. In this study, the influence of K(+) supply (0.02-40 mM) and nitrogen source (10 mM NH(4)(+) or NO(3)(-)) on root plasma membrane K(+) fluxes and cytosolic K(+) pools, plant growth, and whole-plant K(+) distribution in the NH(4)(+)-tolerant plant species rice (Oryza sativa L.) was examined. Using th...

1 Department of Computer Science, Dartmouth College, Hanover, NH 03755, USA 2 Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115, USA 3 Department of Chemistry, Dartmouth College, Hanover, NH 03755, USA 4 Department of Biological Sciences, Dartmouth College, Hanover, NH 03755, USA 5 Corresponding authors. 6211 Sudikoff Laboratory, Hanover, NH...

Nguyen Duc Thuy Pham Minh Ha Tãm t3⁄4t: Bμi b ̧o tr×nh bμy mét sè kinh nghiÖm ® ̧nh gi ̧ b ̈ng th«ng chia sÎ cho lo1i h×nh dÞch vô tèc ®é bÝt biÕn ®æi (VBR), tèc ®é bÝt kh«ng ®æi (CBR), vμ tèc ®é bÝt cã thÓ ® ̧p øng (ABR). Dùa tran c ̧c kÕt qu¶ ph©n tÝch vμ tÝnh to ̧n lý thuyÕt cña c ̧c nghian cøu tr−íc ®ã, c ̧c thùc nghiÖm ®−îc tiÕn hμnh b»ng ph−¬ng ph ̧p m« pháng nh»m kiÓm tra vμ ® ̧nh gi ̧ c ̧c kÕt qu¶ p...