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Journal articles on the topic 'Activity of K'

Author: Grafiati

Published: 28 May 2022

Last updated: 30 July 2025

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1

Swarts, Herman G. P., Jan B. Koenderink, Harm P. H. Hermsen, Peter H. G. M. Willems, and Jan Joep H. H. M. De Pont. "K+-independent Gastric H+,K+-ATPase Activity." Journal of Biological Chemistry 276, no. 40 (2001): 36909–16. http://dx.doi.org/10.1074/jbc.m103945200.

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2

Larsen, Brian Roland, Rikke Holm, Bente Vilsen, and Nanna MacAulay. "Glutamate transporter activity promotes enhanced Na+/K+-ATPase-mediated extracellular K+management during neuronal activity." Journal of Physiology 594, no. 22 (2016): 6627–41. http://dx.doi.org/10.1113/jp272531.

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3

Gadebe, Moses Lesiba, and Okuthe Paul Kogeda. "Top-K Human Activity Recognition Dataset." International Journal of Interactive Mobile Technologies (iJIM) 14, no. 18 (2020): 68. http://dx.doi.org/10.3991/ijim.v14i18.16965.

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<span lang="EN-US">The availability of Smartphones has increased the possibility of self-monitoring to increase physical activity and behavior change to prevent obesity. However self-monitoring on a Smartphtone comes with some challenges such as unavailability of lightweight classification algorithm, personalized dataset to completely capture bodily postures, subject sensitivity, limited storage and computational power. However, most classification algorithms such as Support Vector Machines, C4.5, Naïve Bayes and K Neighbor relies on larger dataset to accurately predict human activities.

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4

Voltarelli, J. C., R. P. Falcão, I. F. Carvalho, and C. Bottura. "K-Cell Activity in Aplastic Anaemia." Scandinavian Journal of Haematology 30, no. 5 (2009): 451–57. http://dx.doi.org/10.1111/j.1600-0609.1983.tb02533.x.

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5

Kazachenko, V. N., M. E. Astashev, and A. A. Grinevich. "Multifractal analysis of K+ channel activity." Biochemistry (Moscow) Supplement Series A: Membrane and Cell Biology 1, no. 2 (2007): 169–75. http://dx.doi.org/10.1134/s1990747807020109.

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6

Siklós, P., L. Ungár, P. Hercz, K. Tótpál, Á. Németh-Csóka, and T. Garam. "K-cell activity is enhanced intrapartum." Immunology Letters 13, no. 3 (1986): 133–35. http://dx.doi.org/10.1016/0165-2478(86)90045-3.

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7

Čolović, M., D. Krstić, K. Krinulović, et al. "Na+/K+-ATPase: Activity and inhibition." Russian Journal of Physical Chemistry A 83, no. 9 (2009): 1602–8. http://dx.doi.org/10.1134/s0036024409090337.

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8

Dempsey, Laurie A. "Asymmetry in PI(3)K activity." Nature Immunology 19, no. 4 (2018): 316. http://dx.doi.org/10.1038/s41590-018-0079-1.

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9

McDonough, Alicia A., and Robert A. Farley. "Regulation of Na, K-ATPase activity." Current Opinion in Nephrology and Hypertension 2, no. 5 (1993): 725–34. http://dx.doi.org/10.1097/00041552-199309000-00006.

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10

V., M. Gurav, G. Huge K., and C. Kondaya G. "Synthesis and biological activity of 4-thiazolidones." Journal of Indian Chemical Society Vol. 84, Nov 2007 (2007): 1174–75. https://doi.org/10.5281/zenodo.5824811.

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P.G. Department of Chemistry, Yeshwant College, Nanded-431 601, Dist. Nanded, Maharashtra, India Department of Chemistry, K. K. M. College, Manwath-431 505, Dist. Parbhani, Maharashtra, India <em>E-mail </em>: kishorhuge@yahoo.com <em>Manuscript received 30 October 2006, revised 14 August 2007, accepted 22 August 2007</em> Synthesis of some 4-thiazolidones have been carried out and characterised.

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11

Xiong, Zhi-Qi, and Janet L. Stringer. "Sodium Pump Activity, Not Glial Spatial Buffering, Clears Potassium After Epileptiform Activity Induced in the Dentate Gyrus." Journal of Neurophysiology 83, no. 3 (2000): 1443–51. http://dx.doi.org/10.1152/jn.2000.83.3.1443.

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A number of mechanisms have been proposed to play a role in the regulation of activity-dependent variations in extracellular potassium concentration ([K+]o). We tested possible regulatory mechanisms for [K+]o during spontaneous recurrent epileptiform activity induced in the dentate gyrus of hippocampal slices from adult rats by perfusion with 8 mM potassium and 0-added calcium medium in an interface chamber. Local application of tetrodotoxin blocked local [K+]o changes, suggesting that potassium is released and taken up locally. Perfusion with barium or cesium, blockers of the inward rectifyin

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12

Marichal, M. Guerra, A. Rodríguez Del Castillo, P. Martín Vasallo, and E. Battaner Arias. "Characterization of K+-dependent and K+-independentp-nitrophenylphosphatase activity of synaptosomes." Neurochemical Research 18, no. 7 (1993): 751–58. http://dx.doi.org/10.1007/bf00966769.

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13

Alimi, Sheriff. "Voice Activity Detection Using Weighted K-Means Thresholding Algorithm." International Journal of Innovative Technology and Exploring Engineering (IJITEE) 14, no. 4 (2025): 1–7. https://doi.org/10.35940/ijitee.D1051.14040325.

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<strong>Abstract:</strong> Voice activity detection (VAD) separates speech segments from silent segments of an audio signal, and it is valuable for many speech-processing applications because it assists in improving performance and system efficiency; such applications include speech recognition and speaker verification. In this study, K-means, a clustering algorithm, was extended to a thresholding algorithm termed K-means weighted thresholding and was utilized for discriminating voiced/speech segments from silent segments from audio or speech signals. The voice signal was fragmented into frame

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14

Podnar, Hrvoje, Dario Novak, and Ivan Radman. "Effects of a 5-minute classroom-based physical activity on on-task behaviour and physical activity levels." Kinesiology 50, no. 2 (2018): 251–59. http://dx.doi.org/10.26582/k.50.2.17.

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The objective was to explore the effectiveness of a five-minute classroom-based physical activity (5min-Class-PA) to keep student behaviour on task while increasing PA and energy expenditure during school days. The multiple baselines across subjects’ design was implemented to assess on-task behaviour during academic lessons (e.g., Mathematics, Science, Language, Art). Observers were blinded to study condition. A quasi-experimental design was implemented to assess PA volume and energy expenditure using SenseWear Armband body monitor (BodyMedia Inc., Pittsburgh, PA, USA). A convenience sample of

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15

SAKO, Hidenori, Sunao IMANISHI, Makoto ARITA, Tatsuo SHIMADA, Tetsuo HADAMA, and Yuzo UCHIDA. "Unaffected electrogenic Na-K pump activity in "diseased" human atrial fibers, as assessed by intracellular K+ activity." Japanese Journal of Physiology 39, no. 6 (1989): 873–90. http://dx.doi.org/10.2170/jjphysiol.39.873.

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16

Zakharchenko, N. S., A. S. Belous, Y. K. Biryukova, et al. "Immunomodulating and Revascularizing Activity of Kalanchoe pinnata Synergize with Fungicide Activity of Biogenic Peptide Cecropin P1." Journal of Immunology Research 2017 (2017): 1–9. http://dx.doi.org/10.1155/2017/3940743.

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Previously transgenic Kalanchoe pinnata plants producing an antimicrobial peptide cecropin P1 (CecP1) have been reported. Now we report biological testing K. pinnata extracts containing CecP1 as a candidate drug for treatment of wounds infected with Candida albicans. The drug constitutes the whole juice from K. pinnata leaves (not ethanol extract) sterilized with nanofiltration. A microbicide activity of CecP1 against an animal fungal pathogen in vivo was demonstrated for the first time. However, a favorable therapeutic effect of the transgenic K. pinnata extract was attributed to a synergism

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17

PABITRA, KUMAR MANI, DE SUJATA, and KUMAR SANYAL SAROJ. "Studies on Quantity-Intensity Relations of Potassium Availability In some Soils of West Bengal." Journal of Indian Chemical Society Vol. 70, Mar 1993 (1993): 219–22. https://doi.org/10.5281/zenodo.5913911.

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Department of Agricultural Chemistry and Soil Science, Bidhan Chandra Krishi Viswavidyalaya, Kalyani· 741 235 <em>Manuscript received 22 June 1992, revised 12 November 1992, accepted 7 January 1993</em> Studies on quantity/intensity <em>(Q/ I</em>) relations of potassium (K) have been conducted using eight soils of West Bengal with contrasting properties. Several important parameters have been evaluated and their dependence on soil properties discussed. The poolsize of labile K as well as its lability in soils were found to follow the equilibrium activity ratios (\(AR_e^K\)).

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18

Terada, Y., T. Yamada, M. Takayama, et al. "Presence and regulation of Raf-1-K (Kinase), MAPK-K, MAP-K, and S6-K in rat nephron segments." Journal of the American Society of Nephrology 6, no. 6 (1995): 1565–77. http://dx.doi.org/10.1681/asn.v661565.

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Renal nephron segments are heterogeneous, and receptors for endothelin (ET)-1, ET-3, Angiotensin II (AII), epidermal growth factor (EGF), and insulin-like growth factor I distribute differently along the nephron segments. Recently, growth factors and vasoactive substances are reported to stimulate mitogen-activated protein kinase (MAP-K). In this study, we showed that mRNA and proteins of MEK-K, Raf-1-K, MAPK-K, MAP-K (p42 and p44), and S6-K are expressed ubiquitously in intact nephron segment. We demonstrated that four tiers of a cascade composed of the Raf-1-K, MAP-K, MAP-K, and S6-K are sti

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19

Chu, Pei-hsuan, Teng-yi Huang, Jason Williams, and Darrel W. Stafford. "Purification of a Single Peptide with Vitamin K Epoxide to Vitamin K and Vitamin K to Vitamin KH2 Activity." Blood 108, no. 11 (2006): 331. http://dx.doi.org/10.1182/blood.v108.11.331.331.

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Abstract More than 21 million prescriptions for warfarin are written yearly in the US. Yet, in spite of its importance, vitamin K epoxide reductase (VKOR), the target of warfarin, has resisted purification since its identification in 1972. We report the first successful purification and reconstitution of activity of a recombinant human vitamin K epoxide reductase. A series of detergents were screened to determine that best for solubilization of VKOR from microsomes. Detergents tested that were effective in solubilization of VKOR also led to loss of measurable activity. This loss of activity su

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20

Oranusi, Solomon, Adeola Onibokun, Oluwatoyosi Afolabi, et al. "Chemical, microbial and antioxidant activity of Cola lepidota K. Schum fruits." Czech Journal of Food Sciences 38, No. 1 (2020): 11–19. http://dx.doi.org/10.17221/360/2018-cjfs.

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This research was to investigate the chemical composition, antioxidant activity, and microbial profiles of Cola lepidota fruits. One hundred grams each of the fruit exocarp, mesocarp and endocarp were blended and analyses were carried out by the following standard methods. Active acidity and vitamin C contents were 5.5 and 6.34 mg 100 g<sup>–1</sup> in endocarp, 4.5 and 14.39 mg 100 g<sup>–1</sup> in mesocarp and 6.7 and 10.02 mg 100 g<sup>–1</sup> for exocarp. Moisture and carbohydrate contents of 12.31 and 68.72% were in the mesocarp while protein and crud

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21

Noh, Kwang Woo. "Youtube and K Pop fan's Tribute Activity." Journal of the Korea Contents Association 15, no. 6 (2015): 24–32. http://dx.doi.org/10.5392/jkca.2015.15.06.024.

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22

de Villiers, B. L., H. A. Smit, R. C. Lindeque, and J. J. Smit. "Optimizing MCPA (K-salt) activity with adjuvants." South African Journal of Plant and Soil 17, no. 2 (2000): 63–65. http://dx.doi.org/10.1080/02571862.2000.10634869.

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23

Chérel, I., P. Daram, F. Gaymard, C. Horeau, J. B. Thibaud, and H. Sentenac. "Plant K+ channels: structure, activity and function." Biochemical Society Transactions 24, no. 4 (1996): 964–71. http://dx.doi.org/10.1042/bst0240964.

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24

Vieytes, Mariela C., Pablo J. D. Mauas, and Rodrigo F. Díaz. "Chromospheric changes in K stars with activity." Monthly Notices of the Royal Astronomical Society 398, no. 3 (2009): 1495–504. http://dx.doi.org/10.1111/j.1365-2966.2009.15207.x.

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25

Vásárhelyi, B., M. Dobos, A. Nobilis, et al. "Na+/K+-ATPase activity in preterm infants." Pediatric Research 42, no. 3 (1997): 405. http://dx.doi.org/10.1203/00006450-199709000-00139.

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26

Bossard, Mary J., Thaddeus A. Tomaszek, Scott K. Thompson, et al. "Proteolytic Activity of Human Osteoclast Cathepsin K." Journal of Biological Chemistry 271, no. 21 (1996): 12517–24. http://dx.doi.org/10.1074/jbc.271.21.12517.

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27

Rycroft, Michael J. "K. Schindler, Physics of Space Plasma Activity." Surveys in Geophysics 28, no. 5-6 (2007): 407–8. http://dx.doi.org/10.1007/s10712-007-9029-4.

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28

Haviv, Haim, Michael Habeck, Ryuta Kanai, Chikashi Toyoshima, and Steven J. D. Karlish. "Neutral Phospholipids Stimulate Na,K-ATPase Activity." Journal of Biological Chemistry 288, no. 14 (2013): 10073–81. http://dx.doi.org/10.1074/jbc.m112.446997.

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29

Edwards, Gillian, and Arthur H. Weston. "Structure-activity relationships of K+ channel openers." Trends in Pharmacological Sciences 11, no. 10 (1990): 417–22. http://dx.doi.org/10.1016/0165-6147(90)90149-3.

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30

Pedišić, Željko, and Louise L. Hardy. "Physical activity prevalence in Australian children and adolescents:." Kinesiology 49, no. 2 (2017): 135–45. http://dx.doi.org/10.26582/k.49.2.14.

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To illustrate how the differences in measurement protocols affect physical activity (PA) monitoring among Australian children and adolescents aged ~5-17 years, this review aimed to summarize and critically assess the most recent findings from the national and state or territory health surveillance systems and population surveys. We compared methods and results of 21 population surveys identified in an extensive web-based search conducted using the entries ‘Physical Activity’, ‘Surveillance’, ‘Monitoring’, ‘Survey’, ‘Australia’ and the names of Australian states and territories as keywords. A l

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31

Cecchini, Jose A., Javier Fernandez-Río, and Antonio Mendez-Gimenez. "Physical activity, approach-avoidance temperament and depressive symptoms." Kinesiology 51, no. 1 (2019): 60–69. http://dx.doi.org/10.26582/k.51.1.13.

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The goal was to assess the connections between vigorous physical activity (VPA), approach-avoidance temperament and depressive symptoms. Two studies were conducted. Study 1, correlational, to assess the mediating role of both dimensions of temperament, approach-avoidance contrast, between physical activity and depressive symptoms. Participants, 335 college students, completed the International Physical Activity Questionnaire, the Depressive Symptoms Scale (DSS) and the Approach-Avoidance Temperament Questionnaire (Ap-AvTQ). Results showed that approach-avoidance contrast could be considered a

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32

Cheval, L., C. Barlet-Bas, C. Khadouri, E. Feraille, S. Marsy, and A. Doucet. "K(+)-ATPase-mediated Rb+ transport in rat collecting tubule: modulation during K+ deprivation." American Journal of Physiology-Renal Physiology 260, no. 6 (1991): F800—F805. http://dx.doi.org/10.1152/ajprenal.1991.260.6.f800.

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To evaluate the involvement of K(+)-ATPase activity in K+ transport in the terminal segments of the rat nephron, we searched for the existence of a component of Rb+ uptake into microdissected segments of collecting tubule associated with the activity of this ATPase. Results indicated that K(+)-ATPase is stimulated by K+ and by Rb+ in a similar fashion and that it is specifically inhibited by the imidazopyridine Sch 28080 (apparent affinity approximately 5 x 10(-7) M). In both cortical and outer medullary collecting tubules (CCT and MCT) of normal rats, 10(-4) M Sch 28080 significantly inhibite

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33

Min keng He, Min keng He, Jin Zhang Jin Zhang, Fang yan Chen Fang yan Chen, Ke keShu Ke keShu, and Yu bin Tang Yu bin Tang. "One-Pot Fabrication of K-Doped g-C3N4/SiO2Composite with Enhanced Photocatalytic Activity for Degradation of Tetracycline." Journal of the chemical society of pakistan 43, no. 2 (2021): 124. http://dx.doi.org/10.52568/000563/jcsp/43.02.2021.

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K-doped g-C3N4/SiO2composite (SiO2/K-CN) was synthesized by a facile thermal polymerization with potassium chloride, melamine and nano-silica as raw materials. The as-prepared SiO2/K-CN was characterized by various measures. The photocatalytic activity of SiO2/K-CN was tested via the photocatalytic degradation of tetracycline under visible-light irradiation. The results showed that the specific surface area of SiO2/K-CN catalyst was 28.16m2/g, which is larger than that of pristine K-doped g-C3N4. Both K-doping and silica-combination can reduce the recombination rate of photo-generated electron

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34

Min keng He, Min keng He, Jin Zhang Jin Zhang, Fang yan Chen Fang yan Chen, Ke keShu Ke keShu, and Yu bin Tang Yu bin Tang. "One-Pot Fabrication of K-Doped g-C3N4/SiO2Composite with Enhanced Photocatalytic Activity for Degradation of Tetracycline." Journal of the chemical society of pakistan 43, no. 2 (2021): 124. http://dx.doi.org/10.52568/000563.

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K-doped g-C3N4/SiO2composite (SiO2/K-CN) was synthesized by a facile thermal polymerization with potassium chloride, melamine and nano-silica as raw materials. The as-prepared SiO2/K-CN was characterized by various measures. The photocatalytic activity of SiO2/K-CN was tested via the photocatalytic degradation of tetracycline under visible-light irradiation. The results showed that the specific surface area of SiO2/K-CN catalyst was 28.16m2/g, which is larger than that of pristine K-doped g-C3N4. Both K-doping and silica-combination can reduce the recombination rate of photo-generated electron

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35

Szuromi, Phil. "An activity lift for platinum." Science 354, no. 6318 (2016): 1387.11–1389. http://dx.doi.org/10.1126/science.354.6318.1387-k.

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36

Stern, Peter. "Sleep and basal forebrain activity." Science 369, no. 6508 (2020): 1203.11–1205. http://dx.doi.org/10.1126/science.369.6508.1203-k.

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37

Hirota, Yoshihisa, and Yoshitomo Suhara. "New Aspects of Vitamin K Research with Synthetic Ligands: Transcriptional Activity via SXR and Neural Differentiation Activity." International Journal of Molecular Sciences 20, no. 12 (2019): 3006. http://dx.doi.org/10.3390/ijms20123006.

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Vitamin K is classified into three homologs depending on the side-chain structure, with 2-methyl-1,4-naphthoqumone as the basic skeleton. These homologs are vitamin K1 (phylloquinone: PK), derived from plants with a phythyl side chain; vitamin K2 (menaquinone-n: MK-n), derived from intestinal bacteria with an isoprene side chain; and vitamin K3 (menadione: MD), a synthetic product without a side chain. Vitamin K homologs have physiological effects, including in blood coagulation and in osteogenic activity via γ-glutamyl carboxylase and are used clinically. Recent studies have revealed that vit

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38

Stoner, Larry C., and Susan C. Viggiano. "Elevation of basolateral K+induces K+ secretion by apical maxi K+ channels inAmbystoma collecting tubule." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 276, no. 2 (1999): R616—R621. http://dx.doi.org/10.1152/ajpregu.1999.276.2.r616.

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We previously reported that exposure of aquatic-phase Ambystoma tigrinum to a solution containing 50 mM K+(K+ adaptation) caused a nearly 10-fold increase in the number of detectable maxi K+ channels on the apical membrane of their initial collecting tubules. In apparent contradiction to the notion that maxi K+ channels contribute to K+ secretion, these channels were not routinely active at the resting membrane potential (0 mV voltage clamp). To test the possibility that hyperkalemia yields maxi K+ channels that are secreting K+ (i.e., active at 0 mV), we patch-clamped the apical membranes of

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39

Canfield, Victor A., and Robert Levenson. "Domain Swapping between Na,K- and H,K-ATPase Identifies Regions That Specify Na,K-ATPase Activity†." Biochemistry 37, no. 20 (1998): 7509–16. http://dx.doi.org/10.1021/bi980174h.

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40

Awangga, Rolly Maulana, Syafrial Fachri Pane, and Khaera Tunnisa. "Collaboration FMADM And K-Means Clustering To Determine The Activity Proposal In Operational Management Activity." EMITTER International Journal of Engineering Technology 7, no. 1 (2019): 44–54. http://dx.doi.org/10.24003/emitter.v7i1.317.

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Indonesian government agencies under the Ministry of Energy and Mineral Resources still use manual methods in determining and selecting proposals for operational activities to be carried out. This study uses the Decision Support System (DSS) method, namely Fuzzy Multiple Attribute Decision Decision (Fmadm) and K-Means Clustering method in managing Operational Plan activities. Fmadm to select the best alternative from a number of alternatives, alternatives from this study proposed activity proposals, then ranking to determine the optimal alternative. The K-Means Clustering Method to obtain clus

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41

Sánchez-Pay, Alejandro, and David Sanz-Rivas. "Activity patterns in male and female wheelchair tennis matches." Kinesiology 49, no. 1 (2017): 41–46. http://dx.doi.org/10.26582/k.49.1.10.

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The aim of this study was to compare activity patterns between male and female wheelchair tennis (WT) matches. Sixteen singles international WT matches (eight male and eight female) were analysed. Each match was recorded and analysed according to the following variables: total match time (minutes), total set time (minutes), effective playing time (%), total resting time (%), working time: resting time ratio (W:R), resting time between points (seconds), rally duration (seconds), points per set, shots per set, shots per rally, bounces per point, and time between shots (seconds). A Mann-Whitney U

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42

Acampado, Elizabeth, and Madonna Valenzuela. "Physical activity and dietary habits of Filipino college students." Kinesiology 50, no. 1 (2018): 57–67. http://dx.doi.org/10.26582/k.50.1.11.

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No published study has been tracked to date on the physical activity (PA) and dietary habits (DH) of Filipino college students. Thus, this cross-sectional study aimed to determine (1) the prevalence of regular PA among college students in a Philippine setting and (2) the reasons for either adherence to PA or for being inactive, (3) to describe DH of the students, (4) to compare PA involvement and DH across year levels, and (5) to correlate PA and diet behaviors. Data were collected using a self-administered survey questionnaire. Results showed that only 32.8% of the 1,706 students in this stud

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43

Oscar, Mellado-Arbelo, and Ernest Baiget. "Activity profile and physiological demand of padel match play." Kinesiology 54, no. 1 (2022): 51–61. http://dx.doi.org/10.26582/k.54.1.6.

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Padel is a complex sport within which performance relies on the interrelation of multiple factors such as physiological and physical capacities, psychological skills, and tactical and technical knowledge. Padel match involves intermittent whole-body efforts, evidenced by a large number of strokes and repeated high-intensity running actions such as accelerations, decelerations and changes of direction. Due to its recent creation, little is known about the activity and energy demands of padel match play. The purpose of the present study was to systematically review physiological demands of padel

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44

Kanako, Satoh, Nagai Fumiko та Kano Itsu. "Interaction of β-eudesmol with Na+K+-ATPase: inhibition of K+-pNPPase activity". Biochemical Pharmacology 44, № 5 (1992): 993–95. http://dx.doi.org/10.1016/0006-2952(92)90134-5.

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45

Cornelius, Flemming, and Jens Christian Skou. "The effect of cytoplasmic K+ on the activity of the Na+/K+-ATPase." Biochimica et Biophysica Acta (BBA) - Biomembranes 1067, no. 2 (1991): 227–34. http://dx.doi.org/10.1016/0005-2736(91)90048-d.

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46

Safronov, Boris V., and Werner Vogel. "Modulation of delayed rectifier K+ channel activity by external K+ ions inXenopus axon." Pflügers Archiv European Journal of Physiology 430, no. 6 (1995): 879–86. http://dx.doi.org/10.1007/bf01837400.

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47

Javlonabduraimovich, Yuldashev, Ibragimov Shavkat Narzikulovich, Shakhanova Shakhnoza Shavkatovna та Esankulova Bustonoy Sobirovna. "STUDY OF ACUTE TOXICITY AND ANTITUMOR ACTIVITY OF NEW COLCHAMETIN PREPARATION СOLCHAMETIN". International Journal of Medical Sciences And Clinical Research 03, № 03 (2023): 29–36. http://dx.doi.org/10.37547/ijmscr/volume03issue03-05.

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The aim of the study was to study acute toxicity in different methods of administration in mice and rats of a new antitumor preparation "colchametin" (K-2) and its antitumor activity on 2 strains of tumors Material and research methods. Acute toxicity of the preparation K-2 with a single intraperitoneal administration was carried out according to the Litchfield and Wilcoxon method in 60 white infertile mice weighing 202g. both sexes and 60 male and female rats weighing 14010g 5 animals in each group, a total of 120 mice and rats were used. The study of antithumor activity was performed on 12

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48

Gnedin, Yu N. "Chromospheres, activity and magnetic fields." Symposium - International Astronomical Union 189 (1997): 245–52. http://dx.doi.org/10.1017/s0074180900116754.

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Abstract:

This brief review presents the current state of observations of stellar activity effects including the fluxes of chromospheric emission lines: CaII H+K, MgII h+k, SiII 1812 Å multiplet, CIV, as well as radio and X-ray fluxes versus B-V colours and luminosity classes, rotation periods, Rossby number and especially versus the mean magnetic flux density 〈fB〉. Results of stellar magnetic field measurements are presented.

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49

Morita, Hironobu, Nobuhiro Fujiki, Taro Miyahara, Ken Lee, and Kunihiko Tanaka. "Hepatoportal bumetanide-sensitive K+-sensor mechanism controls urinary K+ excretion." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 278, no. 5 (2000): R1134—R1139. http://dx.doi.org/10.1152/ajpregu.2000.278.5.r1134.

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Abstract:

To determine whether a K+-sensor mechanism exists in the hepatoportal region, periarterial hepatic afferent nerve activity responses to intraportal injection of KCl were examined in anesthetized rats. Hepatic afferent nerve activity increased in response to intraportal injection in a K+ concentration-dependent manner, and the increase was attenuated by inhibition of the Na+-K+-2Cl− cotransporter by bumetanide in a dose-dependent manner. These results suggest that a bumetanide-sensitive K+-sensor mechanism exists in the hepatoportal region. Stimulation of this mechanism by intraportal KCl infus

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50

Del Castillo, J. R., V. M. Rajendran, and H. J. Binder. "Apical membrane localization of ouabain-sensitive K(+)-activated ATPase activities in rat distal colon." American Journal of Physiology-Gastrointestinal and Liver Physiology 261, no. 6 (1991): G1005—G1011. http://dx.doi.org/10.1152/ajpgi.1991.261.6.g1005.

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Abstract:

This study sought to establish the presence of K(+)-activated adenosinetriphosphatase (ATPase) activity in the colonic mucosa of the rat distal colon. K(+)-activated ATPase activity was present in apical membranes but not in basolateral membranes. K(+)-activated ATPase activity in apical membranes represented an approximate 10-fold enrichment compared with that in the homogenate. Na(+)-K(+)-activated ATPase activity was also present in homogenate but was enriched less than fourfold in apical membranes. K(+)-activated ATPase activity in apical membranes had both ouabain-sensitive and ouabain-in

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