Search Results - (Author, Cooperation:D. Suh)

2012-11-20

American Association for the Advancement of Science (AAAS)

0036-8075

1095-9203

Biology

Chemistry and Pharmacology

Computer Science

Medicine

Natural Sciences in General

Physics

Absorption ; Electricity ; Hot Temperature ; Hydrogen/chemistry ; *Muscle Contraction ; Muscles/*chemistry/ultrastructure ; *Nanotubes, Carbon ; Optics and Photonics ; Photons ; *Tensile Strength

1089-7623

AIP Digital Archive

Physics

Electrical Engineering, Measurement and Control Technology

We propose simple configurations to measure the thermoelectric power and the four-probe resistivity simultaneously for different types of samples.© 1998 American Institute of Physics.

Electronic Resource

1365-2230

Blackwell Publishing Journal Backfiles 1879-2005

Medicine

Summary Psoriasis is recognized as a chronic, relapsing disorder of the skin, and its clinical course is influenced by various environmental factors. However, only a few articles have addressed the effect of low epidermal hydration status as an exacerbating factor of psoriasis. Our study was performed to investigate the relationship between subjective assessment and quantified data regarding dryness parameters in psoriasis patients. Seventy psoriasis patients were enrolled in our study. Subjective assessments were undertaken by evaluating the extent of involvement, erythema, scale and infiltration of individual lesions. Functional status of stratum corneum was evaluated by measuring electrical capacitance and conductance of the lesional and uninvolved skin of psoriatic patients. In addition, measurement of trans-epidermal water loss was performed. The results showed poor hydration status and barrier function in involved psoriatic epidermis compared with the uninvolved skin. Subjective assessment showed fairly good correlation with the quantified values. In conclusion, the degree of dryness in psoriatic skin lesions − which we presume to be one of the aggravating factors of psoriasis − seemed to be related to disease severity.

Electronic Resource

1089-7690

AIP Digital Archive

Physics

Chemistry and Pharmacology

The magnetoconductivity of two kinds of iodine doped helical polyacetylene, R- and S-polyacetylene, were investigated to understand the effect of the intrafibril and the interfibrillar interaction in the polyacetylene system. The zero-field resistivity ratio, ρr=ρ(1.2 K)/ρ(300 K), is comparable to that of stretch-oriented high-density polyacetylene film, which indicates the partial alignment of chains inside a polymer fiber. At low magnetic fields, the small negative component of magnetoconductivity (positive magnetoresistance) was observed and its magnitude increases as the ρr value increases. In the high field region, the magnetoconductivity is positive and it clearly shows the linear dependence on the magnetic field up to H=30 T. The linear field dependence of magnetoconductivity is different from what is expected in the three-dimensional localization-interaction picture. For the same ρr value samples, the magnitude of negative magnetoconductivity of S-polyacetylene is much bigger than that of R-polyacetylene, which could be attributed to the difference in the degree of helicity determining the strength of interfibrillar interaction. © 2001 American Institute of Physics.

Electronic Resource

1750-3841

Blackwell Publishing Journal Backfiles 1879-2005

Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Process Engineering, Biotechnology, Nutrition Technology

: The intense and complex flavor characteristics of soy sauce makes it very difficult to obtain a comprehensive sensory profiling, and an effective descriptive analysis protocol for soy sauce products has not yet been established. The aims of this study were (1) to establish an objective, effective, and powerful descriptive analysis procedure that can be used to understand the sensory characteristics of soy sauce products and (2) to evaluate the sensory characteristics of 6 fermented type soy sauces with high market share in Korea. The test procedures, reference standards, and definitions for the descriptive terms of soy sauces were developed by 8 trained panelists. Panelists developed 11 aroma attributes, 10 flavor attributes, and 1 mouth feel attribute for evaluating the sensory characteristics of soy sauces. The data set were statistically analyzed by analysis of variance and principal component analysis. There were significant differences among the soy sauce samples in the intensity of all the sensory attributes. The 1st and 2nd principal component (PC) explained 53.6% and 23.5% of the total variation, respectively. The basic taste attributes and fermented/chemical attributes were the dominant attributes defining PC1 and PC2 axes, respectively.

Electronic Resource

1365-2133

Blackwell Publishing Journal Backfiles 1879-2005

Medicine

Background  There are many reports of patients with a severe hydroa vacciniforme (HV)-like eruption in which cutaneous lesions occur in both sun-exposed and non-exposed areas, unlike in true HV. Several patients have died from a malignant haematological neoplasm. In most cases, a latent Epstein–Barr virus (EBV) infection has been detected in the skin lesions.Objectives  To describe the clinical and laboratory features of six additional patients with an EBV-associated HV-like eruption.Methods  The clinical, histological and immunohistochemical features were reviewed. T-cell receptor γ gene rearrangements were studied using polymerase chain reaction (PCR) and heteroduplex analysis. In-situ hybridization was performed to detect mRNA for EBV in skin biopsy specimens. PCR was performed to screen for EBV infection in the skin lesions of three patients and blood of two patients. Photoprovocation with repeated ultraviolet (UV) A exposure was performed in three patients.Results  The severity of the skin lesions and the clinical course varied among the patients. Skin lesions were induced by repeated UVA exposure in three patients and a latent EBV infection was demonstrated in the photoprovoked lesions.Conclusions  Three different clinical courses were found in six patients with an HV-like eruption associated with chronic EBV infection: (i) spontaneous remission; (ii) clearing after photoprotection; and (iii) continuous recurrence irrespective of sun exposure. It is possible that there are two patterns of HV-like eruption associated with chronic EBV infection. One is characterized by recurrent necrotic papulovesicles of the face and the other by nodules and facial swelling. It was demonstrated that the skin lesions could be triggered by repeated UVA exposure in the patients showing recurrent necrotic papulovesicles of the face.

Electronic Resource

0006-291X

Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Biology

Chemistry and Pharmacology

Physics

Electronic Resource

0006-291X

Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Biology

Chemistry and Pharmacology

Physics

Electronic Resource

1432-0509

Key words: Intestines, radiography—Small intestine, gastrointestinal examination

Springer Online Journal Archives 1860-2000

Medicine

Abstract. Background: To evaluate and optimize a modified small bowel follow-through examination (SBFT) by using an oral administration of a large amount (600 mL) of methylcellulose after taking a small amount of barium. Methods: Ninety-nine normal subjects underwent modified SBFT with an oral administration of 600 mL of 0.5% methylcellulose after taking 100 mL of 120% or 100, 150, or 200 mL of 70% w/v barium. The transradiancy and distensibility of the bowel and the transit time were compared with those of 39 other normal subjects who underwent conventional SBFT with 500 mL of 70% w/v barium. Results: Except for two subjects who developed diarrhea immediately after examination, no patients complained of acute symptoms, such as abdominal pain or vomiting. Modified SBFT was much superior to conventional series for obtaining good bowel transradiancy and rapid transit time (range = 37–49 min), but bowel distention was not significantly improved. The use of 150 mL of 70% w/v barium was better than the other three modified techniques for achieving good bowel transradiancy, rapid transit time, and less occurrence of flocculation. Conclusion: Modified SBFT is a simple method for easily improving the image quality in terms of bowel transradiancy and transit time.

Electronic Resource

1432-0509

Key words: Gastrointestinal edema—Edema cirrhosis—Colon edema—CT.

Springer Online Journal Archives 1860-2000

Medicine

Abstract Background: To evaluate the computed tomographic (CT) features of colonic wall thickening in cirrhotic patients and to determine their prognostic value. Methods: We retrospectively reviewed 28 cirrhotic patients with colonic wall thickening (≥10 mm) on CT. Twenty-six of the 28 patients had hepatocellular carcinoma. The severity of hepatic dysfunction was determined by using the Child–Pugh classification. We analyzed the patterns of bowel wall thickening and degree of portal hypertension on CT and the survival periods after initial CT detection of colonic wall thickening. Results: The involved segment of the colon was diffusely thickened with either scalloped or nodular circumferential configuration. In all patients, the thickened colonic wall enhanced poorly. Although the ascending colon was involved in all patients, the transverse (n= 14) or descending (n= 5) colon was also simultaneously involved. Most patients exhibited an advanced stage of portal hypertension on CT. The median survival period of 25 patients who expired was 34 days, and 21 patients (84%) expired within 3 months. Conclusions: Colonic wall thickening on CT can be used as one of the indicators of poor prognosis in cirrhotic patients. Advanced liver cirrhosis with significantly severe dysfunction is the likely cause of mortality. Therefore, a less aggressive therapeutic approach is recommended if hepatocellular carcinoma is coexistent in these patients.

Electronic Resource

1432-1920

Spinal cord ; Infarction ; Magnetic resonance imaging

Springer Online Journal Archives 1860-2000

Medicine

Abstract WE report the MRI findings in two patients with presumed cervical spinal cord infarcts in the anterior spinal artery territory. MRI revealed abnormal signal intensities and/or band-like enhancement in the anterior two-thirds of the cervical spinal cord, corresponding to the vascular territory of the anterior spinal artery. Clinically there was an anterior spinal cord syndrome.

Electronic Resource

1432-1920

Key words Spinal cord ; Infarction ; Magnetic resonance imaging

Springer Online Journal Archives 1860-2000

Medicine

Abstract WE report the MRI findings in two patients with presumed cervical spinal cord infarcts in the anterior spinal artery territory. MRI revealed abnormal signal intensities and/or band-like enhancement in the anterior two-thirds of the cervical spinal cord, corresponding to the vascular territory of the anterior spinal artery. Clinically there was an anterior spinal cord syndrome.

Electronic Resource

1432-1920

Cysticercosis ; MR

Springer Online Journal Archives 1860-2000

Medicine

Summary MR and CT features of neurocysticercosis are variable and depend fundametally on the stage in evolution of the infection, location, number and size of the worm. The authors retrospectively evaluated MR images obtained on a 2.0T superconducting unit in 22 neurocysticercosis patients and observed various MR features including some new findings. A variety of MR findings are presented with special reference to six case reports. The features include: (1) a large simple cyst containing both internal septations and a scolex; (2) suprasellar racemose cysts mimicking other cysts, (3) a fourth ventricular cyst readily depicted by aid of CSF flow-void in the sagittal plane; (4) degenerating cysts showing “white target” appearance; (5) granulomatous lesions having a “black target” appearance; and (6) a meningitic form showing Gd-DTPA enhancement of basal cisterns and of a subacute infarct.

Electronic Resource

1432-1920

Key words Granulation, arachnoid ; Sinuses, venous ; Computed tomography ; Magnetic resonance imaging ; Magnetic resonance venography

Springer Online Journal Archives 1860-2000

Medicine

Abstract We report CT, MRI and angiographic findings of an arachnoid granulation in the straight sinus in a young man. Its density and signal intensity were isodense and isointense with cerebrospinal fluid on CT and MRI, respectively. The lesion appeared as a filling defect on MR venography and conventional angiography.

Electronic Resource

1432-1424

Key words: Trachea — K+ channels — Basolateral membrane — cAMP

Springer Online Journal Archives 1860-2000

Biology

Chemistry and Pharmacology

Abstract. To study K+ channels in the basolateral membrane of chloride-secreting epithelia, rat tracheal epithelial monolayers were cultured on permeable filters and mounted into an Ussing chamber system. The mucosal membrane was permeabilized with nystatin (180 μg/ml) in the symmetrical high K+ (145 mm) Ringer solution. During measurement of the macroscopic K+ conductance properties of the basolateral membrane under a transepithelial voltage clamp, we detected at least two types of K+ currents: one is an inwardly rectifying K+ current and the other is a slowly activating outwardly rectifying K+ current. The inwardly rectifying K+ current is inhibited by Ba2+. The slowly activating K+ current was potentiated by cAMP and inhibited by clofilium, phorbol 12-myristae 13-acetate (PMA) and lowering temperature. This is consistent with the biophysical characteristics of I SK channel. RT-PCR analysis revealed the presence of I SK cDNA in the rat trachea epithelia. Although 0.1 mm Ba2+ only had minimal affect on short-circuit current (I sc) induced by cAMP in intact epithelia, 0.1 mm clofilium strongly inhibited it. These results indicate that I SK might be important for maintaining cAMP-induced chloride secretion in the rat trachea epithelia.

Electronic Resource

1432-2242

Triticum aestivum ; Agropyron ; (Elytrigia, Thinopyrum) ; Intergeneric hybridization ; Crossability ; Wide crosses

Springer Online Journal Archives 1860-2000

Biology

Summary Intergeneric hybrids between Triticum aestivum L. and conventional rhizomatous Agropyron species were produced in variable frequencies. They were recovered in high percentage frequencies for T. aestivum cultivars with A. acutum (14.6%), A. intermedium (48.0%), A. pulcherrimum (53.3%), and A. trichophorum (46.6%). The crossability percentages with the highly crossable cultivar ‘Chinese Spring’ for these Agropyron species accessions were 33.12%, 65.0%, 53.3%, and 65.4%, respectively. Autosyndetic associations of two of their three genomes gave mean meiotic chromosome association data of 17.0 I (univalents) +1.53 II (ring bivalents) + 7.04 II (rod bivalents) +1.43 III (trivalents) +0.05 IV (quadrivalents) +0.01 IV (pentavalents) for A. acutum and of 21.8 I + 1.56 II (rings) +7.22 II (rods) +0.84 III + 0.04 IV for A. intermedium. Chromosome pairing at metaphase I was comparatively lower for A. pulcherrimum (34.4 I + 0.2 II (rings) +3.4 II (rods) +0.14 III) and A. trichophorum (36.7 I + 0.35 II (rings) +2.26 II (rods) + 0.04 III) hybrids with T. aestivum. Hybrids of wheat with A. campestre and A. repens were obtained in low frequency. Direct crossing did not permit T. aestivum/ A. desertorum hybridization. However, by utilizing the 2n=10x=70 A. repens/A. desertorum amphiploid as the pollen source, hybridization with T. aestivum did indeed occur. Aneuploidy was prevalent in this hybrid combination while all other hybrid combinations were apparently normal.

Electronic Resource

1432-1777

Springer Online Journal Archives 1860-2000

Biology

Medicine

Electronic Resource

1432-1777

Springer Online Journal Archives 1860-2000

Biology

Medicine

Electronic Resource

1432-1777

Springer Online Journal Archives 1860-2000

Biology

Medicine

Electronic Resource