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...

Natural helper (NH) cells are recently discovered innate immune cells that confer protective type 2 immunity during helminth infection and mediate influenza-induced airway hypersensitivity. Little is known about the ontogeny of NH cells. We report in this study that NH cells derive from bone marrow lymphoid progenitors. Using RAG-1Cre/ROSA26(YFP) mice, we show that most NH cells are marked with...

Inspired by biosilicification, biomimetic polymer-silica nanocomposite has aroused a lot of interest from the viewpoints of both scientific research and technological applications. In this study, a novel dual functional polymer, NH₂-Alginate, is synthesized through an oxidation-amination-reduction process. The "catalysis function" ensures the as-prepared NH₂-Alginate inducing biomimetic mineral...

Activation of rat proteinase-activated receptor 2 (PAR2) by trypsin involves the unmasking of the tethered sequence S(37)LIGRL(42) that either tethered or on its own as a free peptide, activates PAR2. We aimed to determine whether different peptide sequences acting either as trypsin-revealed tethered ligands or as soluble peptides had the same relative activities for triggering the receptor. A ...