• Title/Summary/Keyword: S-1

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SUMMING AND DOMINATED OPERATORS ON A CARTESIAN PRODUCT OF c0 (𝓧) SPACES

  • Badea, Gabriela;Popa, Dumitru
    • Journal of the Korean Mathematical Society
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    • v.54 no.3
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    • pp.967-986
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    • 2017
  • We give the necessary condition for an operator defined on a cartesian product of $c_0(\mathcal{X})$ spaces to be summing or dominated and we show that for the multiplication operators this condition is also sufficient. By using these results, we show that ${\Pi}_s(c_0,{\ldots},c_0;c_0)$ contains a copy of $l_s(l^m_2{\mid}m{\in}\mathbb{N})$ for s > 2 or a copy of $1_s(l^m_1{\mid}{\in}\mathbb{N})$, for any $l{\leq}S$ < ${\infty}$. Also ${\Delta}_{s_1,{\ldots},s_n}(c_0,{\ldots},c_0;c_0)$ contains a copy of $l_{{\upsilon}_n(s_1,{\ldots},s_n)}$ if ${\upsilon}_n(s_1,{\ldots},s_n){\leq}2$ or a copy of $l_{{\upsilon}_n(s_1,{\ldots},s_n)}(l^m_2{\mid}m{\in}\mathbb{N})$ if 2 < ${\upsilon}_n(s_1,{\ldots},s_n)$, where ${\frac{1}{{\upsilon}_n(s_1,{\ldots},s_n})}={\frac{1}{s_1}}+{\cdots}+{\frac{1}{s_n}}$. We find also the necessary and sufficient conditions for bilinear operators induced by some method of summability to be 1-summing or 2-dominated.

A Report on the Salmonella Cultures Collected in Korea (1972) (1972년도(年度) 한국(韓國)에서 분리(分離)된 쌀모넬라 균속(菌屬)에 관(關)한 보고(報告))

  • Kim, Young-Ja;Kim, Ki-Hong;Ryu, Young-Hat
    • The Journal of the Korean Society for Microbiology
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    • v.8 no.1
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    • pp.1-5
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    • 1973
  • The authors identified 833 Salmonella cultures collected from various parts of the country in 1972. The procedures for the morphological and biochemical tests and for the serological determinations were performed by means of the conventional screening methods recommended by the National Center for Disease Control in U.S.A. The results of the laboratory tests were summerized as follows: 1. Of 833 Salmonella cultures, 1 S. paratyphi A, 1 S. nitra, 1 S. kiel, 1 S. abortusequi, 6 S. paratyphi B, 5 S. abony, 4 S. caledon, 13 S. typhimurium, 2 S. coeln, 1 S. oranienburg, 1 S. thompson, 1 S. bonn, 1 S. gabon, 1 S. colorado, 1 S. richmond, 2 S. berta, 20 S. enteritidis, 1 S. regent, 1 S. london were identified besides 769 cultures of S. typhi. 2. The antibiotics sensitivity tests by means of Ericsson's disc method using seven kinds of antibiotics were carried out, i.e. chloramphenicol, ampicillin, which were widely in common use in the country and the results were compared with that of Salmonella cultures isolated in 1971 as shown in table 4.

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Chromosome Studies on Several Wild Sepcies of Drosophilidae (야생 초파리 수종의 염색체에 관한 연구)

  • 강영선;김영진;방규환
    • The Korean Journal of Zoology
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    • v.7 no.2
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    • pp.13-18
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    • 1964
  • The chromosomes of thirteen wild forms of Drosophila obtained from Kwangnung in Kyunggi Province, Korea were investigated with the ganglion cells of both male and female larvae using the aceto-lactic orcein squashed method. The male chromosome patterns of the species observed in the present study are summarized as follows:

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Synthetic Studies on the Nucleophilic Addition of 1-Methyl-5-mercapto-1,2,3,4-tetrazole to Vinylsulfilimines (Vinylsulfilimine유도체에 대한 1-methyl-5-mercapto-1,2,3,4-tetrazole의 친핵성 첨가물에 관한 연구)

  • Tae-Rin Kim;So-Young Lee;Sang-Yong Pyun
    • Journal of the Korean Chemical Society
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    • v.36 no.2
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    • pp.318-323
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    • 1992
  • Following seven new nucleophilic adducts of sulfilimine compounds were prepared by the addition of 1-methyl-5-mercapto-1,2,3,4-tetrazole to vinylsulfilimine derivatives; S-Phenyl-S-2-(1-methyl-1,2,3,4-tetrazole-5-thio)-ethyl-N-p-tosylsulfilimine, S-p-tolyl-S-2-(1-methyl-1,2,3,4-tetrazole-5-thio)-ethyl-N-p-tosylsulfilimine, S-m-tolyl-S-2-(1-methyl-1,2,3,4-tetrazole-5-thio)-ethyl-N-p-tosylsulfilimine, S-p-chlorophenyl-S-2-(1-methyl-1,2,3,4-tetrazole-5-thio)-ethyl-N-p-tosylsulfilimine, S-p-bromophenyl-S-2-(1-methyl-1,2,3,4-tetrazole-5-thio)-ethyl-N-p-tosylsulfilimine, S-p-methoxyphenyl-S-2-(1-methyl-1,2,3,4-tetrazole-5-thio)-ethyl-N-p-tosylsulfilimine and S-p-nitrophenyl-S-2-(1-methyl-1,2,3,4-tetrazole-5-thio)-ethyl-N-p-tosylsulfilimine. The structures of these adducts were confirmed by elemental analyses, MP, UV, IR-and NMR-Spectra.

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Analysis of a Sphingosine 1-phosphate Receptor $hS1P_3$ in Rat Hepatoma Cells

  • Im, Dong-Soon
    • The Korean Journal of Physiology and Pharmacology
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    • v.6 no.3
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    • pp.139-142
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    • 2002
  • To examine intracellular signaling of human $S1P_3\;(hS1P_3),$ a sphingosine 1-phosphate (S1P) receptor in plasma membrane, $hS1P_3$ DNA was transfected into RH7777 rat hepatoma cell line, and the inhibition of forskolin-induced cAMP accumulation and activation of MAP kinases by S1P were tested. In $hS1P_3$ transformants, S1P inhibited forskolin-induced activation of adenylyl cyclase activity by about 80% and activated MAP kinases in dose-dependent and pertussis-toxin (PTX) sensitive manners. In oocytes expressing $hS1P_3$ receptor, S1P evoked $Cl^-$ conductance. These data suggested that PTX-sensitive G proteins are involved in $hS1P_3-mediated$ signaling, especially the positive action of S1P in cell proliferation. The potential advantages of rat hepatoma cells for the research of sphingosine 1-phosphate receptor are discussed.

Synthesis of Nucleophilic Adducts of Thiols(II). Addition of Thioglycolic Acid to ${\beta}$-Nitrostyrene Derivatives (Thiol의 친핵성 첨가물의 합성 (제2보). ${\beta}$-nitrostyrene 유도체에 대한 Thioglycolic Acid의 친핵성 첨가반응)

  • Tae-Rin Kim;Tae-Sung Huh;In-Sup Han
    • Journal of the Korean Chemical Society
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    • v.25 no.6
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    • pp.390-393
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    • 1981
  • Eight new compounds were prepared by the addition reaction of thioglycolic acid to ${\beta}$-nitrostyrene and its derivatives. s-[2-Nitro-1-phenylethyl]-thioglycolic acid; s-[2-nitro-1-(p-methyl)phenylethyl]-thioglycolic acid; s-[2-nitro-1-(p-methoxy)phenylethyl]-thioglycolic acid; s-[2-nitro-1-(p-chloro)phenylethyl]-thioglycolic acid; s-[2-nitro-1-(p-bromo)phenylethyl]-thioglycolic acid; s-[2-nitro-1-(p-nitro)phenylethyl]-thioglycolic acid; s-[2-nitro-1-(3-methoxy-4-ethoxy)phenylethyl]-thioglycolic acid; s-[2-nitro-1-(3,4,5-trimethoxy)phenylethyl]-thioglycolic acid; The structure of these compound were identified by elemental analysis, UV, IR and NMR spectral data.

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Pro-apoptotic Effects of S100A8 and S100A9 on human FIP1L1-PDGFRα+ Eosinophilic Leukemia Cells

  • Lee, Ji-Sook
    • Biomedical Science Letters
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    • v.27 no.2
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    • pp.95-98
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    • 2021
  • The S100 family proteins act as inducers of cancer cell apoptosis and inflammatory mediators. This study examined the pro-apoptotic mechanism caused by S100A8 and S100A9 in human FIP1L1-PDGFRα-positive eosinophilic leukemia cells. S100A8 and S100A9 elicited the death of EoL-1 cells in a time and dose-dependent manner. The activation of PDGFRα was suppressed by a decrease in PDGFRα after treatment with S100A8 and S100A9. Cycloheximide, a translation inhibitor, suppressed PDGFRα expression from 1 h to 5 h, and a co-treatment with S100A8 and S100A9 boosted the decrease in expression. The phosphorylation and expression of STAT5 decreased after treatment with S100A8 and S100A9 in EoL-1 and imatinib-resistant (EoL-1-IR) cells. S100A8 and S100A9 induced the chemotaxis of EoL-1 cells but did not affect the chemoattraction of EoL-1-IR. These findings indicate the cell death mechanism due to S100 family proteins and the development of leukemia therapy using S100A8 and S100A9.

A Study on the Amino Acid Contents of Edible Mushrooms (식용(食用)버섯류(類)의 아미노산(酸)에 관(關)한 연구(硏究))

  • Pyo, Myoung-Yun;Ro, Ihl-Hyeob
    • Journal of Nutrition and Health
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    • v.8 no.1
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    • pp.47-59
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    • 1975
  • Free amino acids in extracts and total amino acids in hydrolysates of eleven species of edible mushrooms were analyzed by amino acid autoanalyzer (Technicon PNC-1 Type). All these 11 species of mushroom can be repesented for convenience sake as follows. S-1; Agaricus campestris Fr. S-2: Agaricus campestris S-3; Pholiota nameko(I. Ito) S. Ito et Imai S-4; Auricularia auricula-judae(Fr.) $Qu{\acute{e}}l$ S-5; Tremella fuciformis Berk. S-6; Tricholoma matsutake(S. Ito et Imai) Sing. S-7; Pleurotus ostreatus Fr. $Qu{\acute{e}}l$ S-8; Lentinus edodes Berk Sing. S-9; Ramaria botrytis (Pers.) Ricken S-10; Coprinus comatus(Fr.) S.F, Gray S-11; Gyrophora esculenta The results obtained from this study are as follows. 1) 17 kinds of amino acid, including 7 kinds of essential amino acid in human nutrition except tryptophan were identified and quantified. 2) Of all free amino acids contained in mushrooms, glutamic acid is the richest, and then comes Ala, Thr, Pro and Lys in that order. There were no found Cys'and His in S-9;His in S-1; Met and Arg in S-11; Cys and Met in S-5;Pro, Cys, Met, Lys and Arg in S-4. Of all total amino acids which are closely related with nutritional valuation, glutamic acid is the richest, and then comes Asp, Ala, Arg, Leu, Thr, Gly in that order. Especially S-1 and S-2 contain high quantity $o{\acute{i}}$ proline in both free and total amino acids. 3) Cotents of ammonia in extracts of mushrooms in decreasing order in S-1, S-10, S-8, S-2, S-7, S-6, and S-2, S-6, S-8, S-9, S-1 in hydrolysates of mushrooms. 4) Gross Contents of free amino acid in extracts is high in decreasing order in S-10, S-1, S-7, S-6, S-8, and total amino acid in hydrolysates is high in S-10, S-2, S-2, S-8, S-1, S-9, S-6. 5) Besides 17 kinds of amino acid, 5 kinds of unknown amino acid are found in extracts and hydrolysates.

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First-principles Study on the Half-metallicity and Magnetism of the (001) Surfaces of (AlP)1/(CrP)1 Superlattice ((AlP)1/(CrP)1 초격자계에서 (001) 표면의 자성과 반쪽금속성에 대한 제일원리 연구)

  • Bialek, Beata;Lee, Jae Il
    • Journal of the Korean Magnetics Society
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    • v.25 no.6
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    • pp.175-179
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    • 2015
  • The half-metallicity and magnetism of the (001) surfaces of $(AlP)_1/(CrP)_1$ superlattice were investigated by means of FLAPW (Full-potential Liniarized Augmented Plane Wave) method. We considered four types of (001) surface termination, i.e., Al(S)-, Cr(S)-, P(S)Al(S-1)- and P(S)Cr(S-1)-term systems. We found that only Cr(S)-term system maintains the half-metallicity at the surface as only this system has the calculated magnetic moment of integer number of bohr magnetons. The magnetic moment of Cr(S) atom in the system was $3.02{\mu}_B$ which was increased from the bulk value by the effects of band narrowing and increased spin-splitting at the surface. The electronic density of states of the P(S) atom in the P(S)Al(S-1)-term showed very sharp surface states due to the broken $p_z$ bonds at the surface. We found there is still a strong p-d hybridization between the P(S) and Cr(S-1) layers in the P(S)Cr(S-1)-term which causes a considerable increase of magnetic moment of P(S) atom.

Synthesis and Optical Properties of Ca1-xSrxS:Ce Phosphors (Ca1-xSrxS:Ce 형광체의 합성과 광 특성)

  • Heo, Yeong-Deok;Seong, Hye-Jin;Do, Yeong-Rak
    • Journal of the Korean Chemical Society
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    • v.50 no.6
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    • pp.471-476
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    • 2006
  • series of Ca1-xSrxS:Ce phosphors were synthesized by solid-state reactions. The Ca1-xSrxS:Ce phosphors have a strong absorption in region from 430 nm to 470 nm. The emission peaks of CaS:Ce are located at 510 nm and 570 nm. The partial replacement of Ca by Sr in Ca1-xSrxS:Ce causes a blue shift of emission wavelengths. The Ca1-xSrxS:Ce can be used as bluish green and yellow emitting phosphors for white light emitting diodes (LEDs) pumped by the blue LED. We reported the optical properties of Ca1-xSrxS:Ce phosphors for application in phosphor converted white LEDs.