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    Tytuł:
    Effect of Karanja biodiesel blends on the characteristics of diesel engine
    Autorzy:
    Yadav, Sandeep
    Kumar, Amit
    Chaudhary, Abhilasha
    Powiązania:
    https://bibliotekanauki.pl/articles/2176951.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    Diesel engine
    Karanja biodiesel
    performance
    combustion
    emission
    silnik Diesla
    biodiesel Karanja
    wydajność
    spalanie
    emisja
    Opis:
    Extensive research is being conducted to create and use a wide range of alternative fuels to accommodate the world's growing energy needs. The objective of this experimental investigation was to analyze the effects of Karanja biodiesel blends on the performance, combustion, and emission characteristics of a compression ignition (CI) engine vis-a-vis neat diesel. Important physical parameters of Karanja oil were examined experimentally after transesterification and determined to be within acceptable limits. BTE of Karanja biodiesel blends was about 3-8% lower than diesel. For Karanja biodiesel blends, BSFC was about 2-9% higher than diesel but exhaust gas temperature and volumetric efficiency were lower. Emissions characteristics such as nitrogen oxides, hydrocarbons, and carbon monoxide were also analyzed for various tested fuels. Karanja biodiesel blends resulted in lesser CO and HC formation. Nonetheless, NOx emissions were around 10% greater than diesel. Peak cylinder pressure, heat release rate, and maximum rate of pressure rise versus crank angle were among the combustion characteristics parameters considered in this study. Combustion analysis revealed that for Karanja biodiesel blends heat release rate and peak cylinder pressure were lower than for neat diesel. Findings indicate that Karanja biodiesel can be considered a viable diesel engine fuel.
    Źródło:
    Zeszyty Naukowe. Transport / Politechnika Śląska; 2022, 115; 249--264
    0209-3324
    2450-1549
    Pojawia się w:
    Zeszyty Naukowe. Transport / Politechnika Śląska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Anaesthetic management of a pregnant women taking sildenafil for intra uterine growth retardation undergoing caesarean section: a case report
    Autorzy:
    Kumar, Sandeep
    Nayak, Sudhansu Sekhar
    Yadav, Usha
    Yadav, Rupesh
    Powiązania:
    https://bibliotekanauki.pl/articles/29432032.pdf
    Data publikacji:
    2024-03-31
    Wydawca:
    Towarzystwo Pomocy Doraźnej
    Tematy:
    Caesarean section
    hypotension
    sildenafil
    anaesthesia
    Opis:
    The role of Sildenafil was found in the potential weight gain of the foetus in pregnant women with intrauterine growth retardation (IUGR). Sildenafil acted by inhibiting phosphodiesterase type 5 (PDE5), which was an important enzyme responsible for the degradation of Cyclic guanosine monophosphate (cGMP), resulting in prolongation of action of cGMP and therefore prolonged smooth muscle relaxation and vasodilation of smooth muscle. The mechanism behind the beneficial effect on IUGR was its vasodilator action and, hence, an increase in uteroplacental circulation. But the main issue during anaesthesia was fear of severe hypotension, ocular side effects, and bleeding due to the effect of sildenafil. which was expected in pregnant women taking Sildenafil for intrauterine growth retardation undergoing caesarean section. Severe hypotension was due to augmentation of hypotensive effect of sildenafil and regional anaesthesia. A 29-year-old female, previously healthy, non-smoking, at 33 weeks’ period of gestation presented with complaints of headache and pedal edema in third trimester and was diagnosed with gestational hypertension. On the 28th day of admission, she had episodes of elevated blood pressure. The patient was considered for emergency caesarean section after taking high-risk consent. Techniques for cesarean sections include the single shot spinal technique, epidural catheter technique, or the combined spinal-epidural technique (CSE). While spinal anaesthesia offers a simpler approach with a faster and more reliable onset of surgical anaesthesia, it may be associated with abrupt hemodynamic changes. On the contrary, epidural anaesthesia allows for a gradual onset of sympathectomy, titrated dosing, and postoperative analgesia. In this case, the decision was made to opt for epidural anaesthesia over spinal approach was made to allow for careful drug titration and enhance hemodynamic stability. We conclude that graded epidural epidural anaesthesia played an important role in the prevention of hypotension that was expected in pregnant women taking Sildenafil for intrauterine growth retardation undergoing caesarean section.
    Źródło:
    Critical Care Innovations; 2024, 7, 1; 49-53
    2545-2533
    Pojawia się w:
    Critical Care Innovations
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-2 z 2

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