scholarly journals Groundwater chemical anomalies connected with the Kamchatka earthquake (M=7.1) on March 1992

2006 ◽  
Vol 6 (5) ◽  
pp. 853-859 ◽  
Author(s):  
P. F. Biagi ◽  
L. Castellana ◽  
A. Minafra ◽  
G. Maggipinto ◽  
T. Maggipinto ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Sampling Rate ◽  
Capital City ◽  
Geochemical Data ◽  
Deep Wells ◽  
Geochemical Parameters ◽  
Peak Energy ◽  
Before And After ◽  
Kamchatka Earthquake ◽  
Chemical Anomalies

Abstract. The energy released by the earthquakes occurred in the seismogenetic area of the southern Kamchatka (Russia) from January 1977 to December 2004, reveals an increase in the peak energy in the period 1992–1999. This increase is related to the occurrence of seven earthquakes with magnitude ranging from 6.9 to 7.7; the first of these earthquakes happened on 2 March 1992 with M=7.1. For many years, hydro-geochemical data have been collected with a mean sampling rate of three days, in the form of the most common ions and gases in the water of deep wells and natural springs of a network operating in the south area of the Kamchatka, where the capital city Petropavlovsk is located. The collected data were analysed and differences in the trend and in the spectral content of some hydro-geochemical parameters at the springs were pointed out before and after the occurrence of the March 1992 earthquake, indicating clear post-seismic effects. Then an evident increase in the Carbon Dioxide and in the Hydrogen content appeared practically at each measurement site during the two-four years preceding the earthquake, so that long term precursors can be claimed. Finally, an anomalous decrease in the Carbon Dioxide content at the springs was revealed two/three months prior the earthquake, as a middle term precursor. The earthquake on March 1992 was the event nearest (90–120 km) to the measurement sites that happened in last thirty years.

scholarly journals Geochemical features of the organic matter from Jurassic sediments of the Nadym‑Taz interfluve

Georesursy ◽  
2020 ◽  
Vol 22 (3) ◽  
pp. 21-27
Author(s):  
Lyubov S. Borisova ◽  
Alexander N. Fomin ◽  
Ekaterina S. Yaroslavtseva
Keyword(s):  
Organic Matter ◽  
Sedimentary Cover ◽  
Lower Jurassic ◽  
Geochemical Data ◽  
The North ◽  
Deep Wells ◽  
Geochemical Parameters ◽  
Insoluble Organic Matter ◽  
Bazhenov Horizon ◽  
Rock Eval

This paper deals with the evaluation of oil-generation potential derived from the geochemical data on deep-buried Jurassic sedimentary rocks of the Nadym-Taz interfluve being part of the West Siberian petroleum basin (PB). The study provides analysis of samples from ultra-deep and deep wells that penetrated the Mesozoic-Cenozoic sedimentary cover in the north of the central part of PB (En-Yakhinsky, Evo-Yakhinsky, Yarudeysky, Tyumensky areas, etc.). The research focuses on the insoluble organic matter (OM) from Upper, Middle and Lower Jurassic sediments (54 samples). A comprehensive study of the kerogen by elemental, isotope analyses and pyrolysis Rock-Eval allowed obtaining the data critical for determining the genetic type of OM, its thermal maturity and residual petroleum generating potential. Using the Surfer and Corel Draw software, schematic maps and diagrams of variations in the most informative (i.e. area-specific and depth-dependent) geochemical parameters of the kerogen on the studied area and also down the section (from the Upper to the Lower Jurassic) were constructed and analyzed. The obtained geochemical data indicate that in the Jurassic sediments of the Nadym-Tazovsky interfluve, the highest OM generation potential is found in the Bazhenov horizon, as well as in individual members of the Malyshevsky, Leontievsky, Sharapovsky and Kiterbyutsky horizons. Based upon the level of OM maturity in the Upper and Middle Jurassic sediments, deposits of mainly oil and fat gases could be preserved, and in the Lower Jurassic – deposits of fat and dry gases.

Carbon Capture Performance of Amino-Modified MIL-101 at Room Temperature

2013 ◽  
Vol 395-396 ◽  
pp. 637-640
Author(s):  
Yi Yang ◽  
Zheng Ping Wang ◽  
Ling Meng ◽  
Lian Jun Wang
Keyword(s):  
Carbon Dioxide ◽  
Specific Surface ◽  
Pore Structure ◽  
Carbon Capture ◽  
Room Temperature ◽  
Ambient Pressure ◽  
Metal Organic Framework ◽  
Adsorption Properties ◽  
Carbon Dioxide Adsorption ◽  
Before And After

MIL-101, a metal-organic framework material, was synthesized by the high-temperature hydrothermal method. Triethylenetetramine (TETA) modification enabled the effective grafting of an amino group onto the surface of the materials and their pore structure. The crystal structure, micromorphology, specific surface area, and pore structure of the samples before and after modification were analyzed with an X-ray diffractometer, scanning electron microscope, specific surface and aperture tester, and infrared spectrometer. The carbon dioxide adsorption properties of the samples were determined by a thermal analyzer before and after TETA modification. Results show that moderate amino modification can effectively improve the microporous structure of MIL-101 and its carbon dioxide adsorption properties. After modification, the capacity of MIL-101 to adsorb carbon dioxide decreased only by 0.61 wt%, and a high adsorption capacity of 9.45 wt% was maintained after six cycles of adsorption testing at room temperature and ambient pressure.

Split face comparative study of microneedling with platelet rich plasma versus Fractional carbon dioxide laser with platelet rich plasma in treatment of atrophic post acne scars

QJM ◽  
2021 ◽  
Vol 114 (Supplement_1) ◽  
Author(s):  
Mohamed Abd Elnaeem Sallam ◽  
Khaled El Zawahry ◽  
Abdul Rahman Muhammed Ali Mustafa
Keyword(s):  
Carbon Dioxide ◽  
Co2 Laser ◽  
Carbon Dioxide Laser ◽  
Platelet Rich Plasma ◽  
Fractional Co2 Laser ◽  
Acne Scars ◽  
Significant Difference ◽  
Before And After ◽  
The Face ◽  
Fractional Carbon Dioxide Laser

Abstract Background Acne scars, is a challenge for dermatologists, despite having multiple treatment modalities like microneedling, dermabrasion, Fractional CO2 Laser, dermal fillers, etc. However, monotherapy has been hardly satisfactory because of the polymorphism seen with the scars. Objective Comparison between microneedling with platelet rich plasma versus Fractional carbon dioxide laser with platelet rich plasma in treatment of atrophic post acne scars. Patients and methods This study was carried out in department of dermatology, venereology and andrology, in Kobry El-Kobba Military complex during the period (from September 2018 to July 2020 ) on 20 patients of both sexes aged from 20 to 60 years old presenting with Goodman and Baron Grade II, III, IV acne scars . Results The study revealed a statistically significant difference (p = 0.017) between Goodman and Baron scar grades on the right side of the face before and after treatment indicating that microneedling with platelet rich plasma was effective in improving acne scars. Also, there is a statistically significant difference (p = 0.010) between Goodman and Baron scar grades on the left side of the face before and after treatment, indicating that fractional CO2 laser with platelet rich plasma was effective in improving acne scars. Conclusion and recommendation Further controlled and randomized studies are needed to validate our findings in a larger cohort of patients and longer follow up. Also, number of sessions might be more than 3 sessions.

Investigation of opportunistic pathogens in municipal drinking water under different supply and treatment regimes

2004 ◽  
Vol 50 (1) ◽  
pp. 83-90 ◽  
Author(s):  
M. Pryor ◽  
S. Springthorpe ◽  
S. Riffard ◽  
T. Brooks ◽  
Y. Huo ◽  
...  
Keyword(s):  
Drinking Water ◽  
Distribution System ◽  
Microbiological Quality ◽  
Opportunistic Pathogens ◽  
Treatment Regimes ◽  
Point Of Use ◽  
Deep Wells ◽  
Before And After ◽  
Legionella Species ◽  
Biofilm Bacteria

Changing regulations to lower disinfectant byproducts in drinking water is forcing utilities to switch disinfection from chlorine to monochloramine. It is generally unknown whether this will impact positively or negatively on the microbiological quality of drinking water. A utility in Florida, using water with relatively high organic carbon levels from deep wells in several wellfields, made the decision to change its disinfection regime from chlorine to chloramine in order to meet the new regulations. To assess the impacts of such a change on the microbiology of its water supplies, it undertook a number of studies before and after the change. In particular, the presence of the opportunistic pathogens Legionella and Mycobacterium, and also the composition of drinking-water biofilms, were examined. A preliminary synthesis and summary of these results are presented here. Legionella species were widely distributed in source waters and in the distribution system when chlorine was the disinfectant. In some samples they seemed to be among the dominant biofilm bacteria. Following the change to monochloramine, legionellae were not detected in the distribution system during several months of survey; however, they remained detectable at point of use, although with less species diversity. A variety of mycobacteria (21 types) were widely distributed in the distribution system when chlorine was the disinfectant, but these seemed to increase in dominance after chloramination was instituted. At point of use, only four species of mycobacteria were detected. Other changes occurring with chloramination included (a) an altered biofilm composition, (b) increased numbers of total coliforms and heterotrophs and (c) nitrification of water storage tanks. The results suggested that consideration should be given to the microbiological effects of changing disinfection regimes in drinking-water and distribution system biofilms.

Breathing in brief exercise

1960 ◽  
Vol 15 (4) ◽  
pp. 583-588 ◽  
Author(s):  
F. N. Craig ◽  
E. G. Cummings
Keyword(s):  
Carbon Dioxide ◽  
Oxygen Uptake ◽  
Respiratory Exchange Ratio ◽  
Metabolic Cost ◽  
Carbon Dioxide Tension ◽  
Minute Volume ◽  
Carbon Dioxide Output ◽  
Respiratory Minute Volume ◽  
Before And After

Two men ran for 20 or 60 seconds while inhaling air, oxygen or 4% carbon dioxide. Inspired respiratory minute volume was determined for each breath. Ventilation increased suddenly in the first breath with minimal changes in end-expiratory carbon dioxide tension and respiratory exchange ratio to a rate that remained constant for 20 seconds before increasing further. The rate of carbon dioxide output was uniform during the first 20 seconds. A 12% grade did not increase ventilation or oxygen uptake during runs of 20 seconds, but in the first minute of recovery, ventilation was 64% greater than after level runs. Inhalation of oxygen inhibited ventilation by 24% in the 20-second periods before and after the end of a 60-second run. Inhalation of carbon dioxide begun at rest produced increments in ventilation and end-expiratory carbon dioxide tension that varied little during running and recovery. In the 20-second runs ventilation varied with speed but appeared independent of ultimate metabolic cost. Submitted on January 21, 1960

scholarly journals Evaluation of pain in outpatient diagnostic hysteroscopy with gas

2010 ◽  
Vol 8 (1) ◽  
pp. 24-28
Author(s):  
Daniela Barreto Fraguglia Quental Diniz ◽  
Daniella de Batista Depes ◽  
Ana Maria Gomes dos Santos ◽  
Simone Denise David ◽  
Salete Yatabe ◽  
...  
Keyword(s):  
Social Sciences ◽  
Carbon Dioxide ◽  
Vaginal Delivery ◽  
Carbon Dioxide Gas ◽  
Verbal Scale ◽  
Experienced Pain ◽  
The Social ◽  
Before And After ◽  
Study Power ◽  
Diagnostic Hysteroscopy

ABSTRACT Objective: To evaluate the intensity of pain reported by patients undergoing outpatient diagnostic hysteroscopy. Methods: Exam performed with a 5-mm lens hysteroscope, vaginal speculum, tenaculum and uterine distention with carbon dioxide gas. Before and after the examination, patients were interviewed to define, in a verbal scale from 0 to 10, pain values that they expected to feel and that they experienced after the end, and also if they would repeat it if indicated. Data were analyzed using Statistical Package for the Social Sciences 15.0, statistic significance was defined as p < 0.05 with a study power of 95%. Results: Fifty-eight patients were included with mean age of 50.9 years, with 32.8% at postmenopause and 6.9% nulliparous. Among those with previous deliveries, mean parity was 2.21 and at least one vaginal delivery had occurred in 63.8%. Only 24.1% of patients knew how the exam would be done, 62.1% needed an endometrial sample and the result was considered satisfactory in 89.7%. The means of expected and experienced pain were similar (6.0 versus 6.1), and 91.4% of women would repeat the hysteroscopy if necessary. The only factor associated with less pain after the exam was previous vaginal delivery, with a decrease of pain score from 7.1 to 5.5 (p = 0.03). Mean pain was significantly lower in those who agreed to repeat the exam (5.8 versus 9.4; p = 0.003). Conclusions: Outpatient diagnostic hysteroscopy with gas can be associated with moderate but tolerable discomfort and satisfactory results.

Ventilatory responses to carbon dioxide at low and high levels of oxygen are elevated after episodic hypoxia in men compared with women

2004 ◽  
Vol 97 (5) ◽  
pp. 1673-1680 ◽  
Author(s):  
Chris Morelli ◽  
M. Safwan Badr ◽  
Jason H. Mateika
Keyword(s):  
Carbon Dioxide ◽  
Ventilatory Response ◽  
Minute Ventilation ◽  
High Oxygen ◽  
Set Point ◽  
Ventilatory Responses ◽  
Episodic Hypoxia ◽  
Before And After ◽  
Oxygen Gas ◽  
End Tidal

We hypothesized that the acute ventilatory response to carbon dioxide in the presence of low and high levels of oxygen would increase to a greater extent in men compared with women after exposure to episodic hypoxia. Eleven healthy men and women of similar race, age, and body mass index completed a series of rebreathing trials before and after exposure to eight 4-min episodes of hypoxia. During the rebreathing trials, subjects initially hyperventilated to reduce the end-tidal partial pressure of carbon dioxide (PetCO2) below 25 Torr. Subjects then rebreathed from a bag containing a normocapnic (42 Torr), low (50 Torr), or high oxygen gas mixture (150 Torr). During the trials, PetCO2 increased while the selected level of oxygen was maintained. The point at which minute ventilation began to rise in a linear fashion as PetCO2 increased was considered to be the carbon dioxide set point. The ventilatory response below and above this point was determined. The results showed that the ventilatory response to carbon dioxide above the set point was increased in men compared with women before exposure to episodic hypoxia, independent of the oxygen level that was maintained during the rebreathing trials (50 Torr: men, 5.19 ± 0.82 vs. women, 4.70 ± 0.77 l·min−1·Torr−1; 150 Torr: men, 4.33 ± 1.15 vs. women, 3.21 ± 0.58 l·min−1·Torr−1). Moreover, relative to baseline measures, the ventilatory response to carbon dioxide in the presence of low and high oxygen levels increased to a greater extent in men compared with women after exposure to episodic hypoxia (50 Torr: men, 9.52 ± 1.40 vs. women, 5.97 ± 0.71 l·min−1·Torr−1; 150 Torr: men, 5.73 ± 0.81 vs. women, 3.83 ± 0.56 l·min−1·Torr−1). Thus we conclude that enhancement of the acute ventilatory response to carbon dioxide after episodic hypoxia is sex dependent.

scholarly journals PENGARUH PENDIDIKAN KESEHATAN TERHADAP PENINGKATAN PENGETAHUAN DAN PENURUNAN KEPADATAN TIKUS DI SUMURBOTO, KECAMATAN BANYUMANIK, SEMARANG

2019 ◽  
Vol 11 (1) ◽  
pp. 47-52
Author(s):  
Martini Martini ◽  
Sri Yuliawati ◽  
Retno Hestiningsih ◽  
Nissa Kusariana ◽  
Sudjut Haryanto
Keyword(s):  
Health Education ◽  
Educational Intervention ◽  
Case Fatality ◽  
Knowledge Score ◽  
Capital City ◽  
Education Intervention ◽  
Research Subjects ◽  
Central Java ◽  
Health Education Intervention ◽  
Before And After

Semarang, the capital city of Central Java Province, is one of the endemic areas in Indonesia with increasing case fatality rate in the last three years. Accordingly, the educational intervention is fundamentally requested. The aim of the study was to evaluate the influence of health education intervention on  the community knowledge improvement and its implication for reducing the rat populations. The study was performed using field experiment with pretest and post test designs. A total of 55 cadres and housewives joining on the various education program at Sumurboto Village, Banyumanik Sub district, Semarang was used as research subjects. The health education interventions introduced in the study were counselling and mentoring. ,Data were analyzed using paired t-test. The results revealed that the knowledge of the subject research significantly increased and the rat populations significantly decreased after being given the educational intervention. The rat species identified in Sumurboto Village were Rattus norvegicus, R. tanezumi, R. exulans and Suncus murinus. The knowledge score before and after the intervention was 80.87 and 88.83 respectively. Meanwhile, the rat populations measured by trap success method reduced from 8% to 6% after the intervention. Nevertheless, the rat population in Sumurboto Village is considerably relative high indicating that the village possessed a high risk on leptospirosis attack. It is strongly suggested that the health education intervention in the community should be regularly maintained in order to accelerate the knowledge of leptospirosis and reduce the rat populations.   

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