Protons

Publication Title: 
Journal of Plant Physiology

Two Prunus rootstocks, the Myrobalan plum P 2175 and the interspecific peach-almond hybrid, Felinem, were studied to characterize their biochemical and molecular responses induced under iron-Deficient conditions. Plants of both genotypes were submitted to different treatments using a hydroponic system that permitted removal of Fe from the nutrient solution.

Author(s): 
Gonzalo, María José
Moreno, María Ángeles
Gogorcena, Yolanda
Publication Title: 
Free Radical Biology & Medicine

Energy restriction (ER), without malnutrition, increases maximum life span and retards the development of a broad array of pathophysiological changes in laboratory rodents. The mechanism responsible for the retardation of aging by ER is, however, unknown. One proposed explanation is a reduction in energy expenditure (EE). Reduced EE may increase life span by decreasing the number of oxygen molecules interacting with mitochondria, thereby lowering reactive oxygen species (ROS) production. As a step toward testing this hypothesis, it is important to determine the effect of ER on EE.

Author(s): 
Ramsey, J. J.
Harper, M. E.
Weindruch, R.
Publication Title: 
International Journal of Radiation Oncology, Biology, Physics

PURPOSE: To investigate patients' willingness to participate (WTP) in a randomized controlled trial (RCT) comparing intensity-modulated radiotherapy (IMRT) with proton beam therapy (PBT) for prostate cancer (PCa). METHODS AND MATERIALS: We undertook a qualitative research study in which we prospectively enrolled patients with clinically localized PCa. We used purposive sampling to ensure a diverse sample based on age, race, travel distance, and physician.

Author(s): 
Shah, Anand
Efstathiou, Jason A.
Paly, Jonathan J.
Halpern, Scott D.
Bruner, Deborah W.
Christodouleas, John P.
Coen, John J.
Deville, Curtiland
Vapiwala, Neha
Shipley, William U.
Zietman, Anthony L.
Hahn, Stephen M.
Bekelman, Justin E.
Publication Title: 
Brain Research

Acidification, which occurs in some pathological conditions, such as ischemia and hypoxia often induces neurotoxicity. The activation of acid-sensing ion channels (ASICs), which are highly permeable to calcium, has been considered the main target responsible for calcium overload in ischemic/hypoxic brain. However, the influence of extracellular proton on GABAergic synaptic transmission is not well understood.

Author(s): 
Zhou, Chunyi
Xiao, Cheng
Deng, Chunyu
Hong Ye, Jiang
Publication Title: 
American Journal of Rhinology & Allergy

BACKGROUND: Proton (H+) secretion and the HVCN1 H+ channel are part of the innate host defense mechanism of the airways. The objective of this study was to determine H+ secretion in asthmatic and nonasthmatic patients with chronic rhinosinusitis (CRS) in freshly excised human sinonasal tissue. METHODS: Nasal or sinus mucosa from subjects with three different conditions (normal, CRS, and CRS with asthma) was harvested during sinus surgery. The equilibrium pH and the rate of H+ secretion were measured in an Ussing chamber using the pH-stat titration technique.

Author(s): 
Cho, Do-Yeon
Hajighasemi, Mohammad
Hwang, Peter H.
Illek, Beate
Fischer, Horst
Publication Title: 
Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine / Society of Magnetic Resonance in Medicine

We develop and implement a selective homonuclear polarization transfer method for the detection of 3.0 ppm C-4 GABA resonance by spectroscopic imaging in the human brain at 7T. This single shot method is demonstrated with simulations and phantoms, which achieves comparable efficiency of detection to that of J-difference editing. The macromolecule resonance that commonly co-edits with GABA is suppressed at 7T through use of a narrow band preacquisition suppression pulse.

Author(s): 
Pan, J. W.
Duckrow, R. B.
Spencer, D. D.
Avdievich, N. I.
Hetherington, H. P.
Publication Title: 
Spine

STUDY DESIGN: Comparison of sodium concentration ([Na]) and proton T2 relaxation time between normal and degenerated discs in a rabbit model. OBJECTIVE: The purpose of this article was to evaluate quantitative [Na] and T2 characteristics of discs associated with degenerative changes. SUMMARY OF BACKGROUND DATA: Intervertebral disc degeneration is a common chronic condition that may lead to back pain, limited activity, and disability.

Author(s): 
Moon, Chan Hong
Jacobs, Lloydine
Kim, Jung-Hwan
Sowa, Gwendolyn
Vo, Nam
Kang, James
Bae, Kyongtae Ty
Publication Title: 
Spine

STUDY DESIGN: Development of a dual-tuned proton/sodium radiofrequency (RF) coil for magnetic resonance imaging (MRI) of the rabbit spine and quantification of sodium concentration in intervertebral discs. OBJECTIVE: To develop the dual-tuned proton/sodium MRI of rabbit lumbar spine to investigate proteoglycan matrix content and intervertebral disc degeneration (IDD). SUMMARY OF BACKGROUND DATA: IDD is a common chronic condition that may lead to back pain, limited activity, and disability. Early-stage IDD involves the loss of proteoglycan matrix and water content in the disc.

Author(s): 
Moon, Chan Hong
Kim, Jung-Hwan
Jacobs, Lloydine
Zhao, Tiejun
Sowa, Gwendolyn
Vo, Nam
Kang, James
Bae, Kyongtae Ty
Publication Title: 
Magnetic resonance in chemistry: MRC

The complete and unambiguous (1)H NMR assignments of ten marker constituents of Ginkgo biloba are described. The comprehensive (1)H NMR profiles (fingerprints) of ginkgolide A, ginkgolide B, ginkgolide C, ginkgolide J, bilobalide, quercetin, kaempferol, isorhamnetin, isoquercetin, and rutin in DMSO-d(6) were obtained through the examination of 1D (1)H NMR and 2D (1)H,(1)H-COSY data, in combination with (1)H iterative full spin analysis (HiFSA).

Author(s): 
Napolitano, José G.
Lankin, David C.
Chen, Shao-Nong
Pauli, Guido F.
Publication Title: 
The Journal of Organic Chemistry

This study demonstrates how regio- and diastereo-isomers with near-identical NMR spectra can be distinguished and unambiguously assigned using quantum mechanical driven (1)H iterative Full Spin Analysis (HiFSA). The method is illustrated with four natural products, the flavonolignans silybin A, silybin B, isosilybin A, and isosilybin B, which exhibit extremely similar coupling patterns and chemical shift differences well below the commonly reported level of accuracy of 0.01 ppm.

Author(s): 
Napolitano, José G.
Lankin, David C.
Graf, Tyler N.
Friesen, J. Brent
Chen, Shao-Nong
McAlpine, James B.
Oberlies, Nicholas H.
Pauli, Guido F.

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