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您的检索式：作者名="Devender Kumar"
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| 1 | Oxide ancillary ligand-based europium β-diketonate complexes and their enhanced luminosity显示文摘Ternary materials of europium complex with2,2,6,6-tetramethyl-3,5-heptanedione(tmhd) ligand and aqua ligand as ancillary ligands have been prepared and characterized for various optoelectronic characteristics.Reactions of hydrated complex [Eu(tmhd)_(3)(H_(2)O)_(2)] proceeded with triphenylphosphine oxide(TPPO) and pyridine-N-oxide(PNO) ancillary ligands were studied to develop novel complexes. The prepared complexes show good thermal stability. A comparative investigation of preparedmaterials[Eu(tmhd)_(3)(H_(2)O)_(2)],[Eu(tmhd)_(3)(TPPO)_(2)] and [Eu(tmhd)_(3)(PNO)_(2)] was conducted for their luminescent behaviors in order to obtain the role of ancillary ligand in the enhancement of illumination amount generated from europium(Eu^(3+)) ion. Color coordinates of prepared ternary complexes such as[Eu(tmhd)_(3)(H_(2)O)_(2)]with(x = 0.54,y = 0.32),[Eu(tmhd)_(3)(TPPO)_(2)] with(x = 0.56, y = 0.32) and[Eu(tmhd)_(3)(PNO)_(2)] with(x = 0.57, y = 0.33) indicated that these materials exhibited bright red emission in visible region spectrum. The complexes show a proficient energy transport pathway from the ligands to the innermost Eu^(3+)by means of an ancillary ligand-sensitized luminescence process. Interaction between the metal and ligand results in a distinguished effect on quantum efficiency(η) as well as on Judd–Ofelt intensity factor(Ω_(2)) of the prepared materials. | Devender Singh Shri Bhagwan Anuj Dalal Kapeesha Nehra Raman Kumar Saini Kapoor Singh Anura Priyajith Simantilleke Sumit Kumar Ishwar Singh | 2021 | Rare Metals2021，40，10： | 1 |
| 2 | Pelvic arterial embolization in obstetric hemorrhage显示文摘AIM: To analyze safety and efficacy of pelvic arterial embolization(PAE) in preventing and treating obstetrical hemorrhage.METHODS: A consecutive study of eight cases undergoing pelvic artery embolization from January 2010 to October 2012 in Department of Obstetric and Gynecology of Maulana Azad Medical College for intractable obstetric hemorrhage was done. All embolization were carried out in cath lab of cardiology Department at associated GB Pant Hospital.RESULTS: Clinical success was defined as arrest of bleeding after PAE without need for repeat PAE or additional surgery which was 75% in our series. PAE was successful in controlling obstetrical hemorrhage in all except one who had mortality. Other had hysterectomy due to secondary hemorrhage. Five resumed menstruation. None of the women intended to conceive, hence are practicing contraception. CONCLUSION: PAE is minimally invasive procedure which should be offered early for hemostasis in intractable obstetrical haemorrhage unresponsive to uterotonic. It is a fertility sparing option with minor complications. | Vidhi Chaudhary Poonam Sachdeva Raksha Arora Devender Kumar Priya Karanth | 2013 | World Journal of Obstetrics and Gynecology2013，2，4： | 1 |
| 3 | Mitigation of the impacts of electric vehicle charging on energy-star ratings for residential buildings in India显示文摘The star-labelling programme for residential buildings was introduced by India in 2020 and applies to all residential buildings with no lower limit on the built-up area or electrical demand.The energy-star label for a residential building is awarded against the notified standard by the regulatory body and electric vehicles(EVs)have not been accommodated as a load for residential buildings.The en-ergy consumption of an existing residential building is taken from a study already carried out and compared with the requirement of the Indian residential star-labelling programme with an EV as a plugged-in load.An annual energy gap of 6060 kWh for the existing residential buildings considered in this study for five-star building energy labels increases to 7784 kWh if the EV load is added to the building load.The residential building will lose two energy stars if it caters to the EV load and,to bridge this energy gap,the replace-ment of existing electrical appliances with five-star-rated energy appliances,employing grid-connected rooftop solar photovoltaics(PV)and retrofit of the building envelope are considered.The techno-economic potential of rooftop solar PV and building envelope retrofitting for existing residential buildings is explored using RETScreen®and eQUEST software,respectively.The study establishes that the installation of rooftop solar PV can accommodate the additional load of EVs and can bridge half and three-quarters of the energy gap to achieve five energy stars for an existing building with and without EVs,respectively.It is the most economical option among the options explored in this study.The target Energy Performance Index is achievable by high-end energy consumers(12000 kWh/year)by additional measures,the replacement of inefficient electrical appliances and building envelope retrofitting in addition to the installation of rooftop solar PV. | Rakesh Dalal Devender Kumar Saini | 2023 | Clean Energy2023，7，5： | 0 |
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