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Baranwal Ajay Kumar,Masutani Hideaki,Sugita Hidetaka,Kanda Hiroyuki,Kanaya Shusaku,Shibayama Naoyuki,Sanehira Yoshitaka,Ikegami Masashi,Numata Youhei,Yamada Kouji,Miyasaka Tsutomu,Umeyama Tomokazu,Ima 나노기술연구협의회 2017 Nano Convergence Vol.4 No.26
Research of CH3NH3PbI3 perovskite solar cells had significant attention as the candidate of new future energy. Due to the toxicity, however, lead (Pb) free photon harvesting layer should be discovered to replace the present CH3NH3PbI3 perovskite. In place of lead, we have tried antimony (Sb) and bismuth (Bi) with organic and metal monovalent cations (CH3NH3 +, Ag+ and Cu+). Therefore, in this work, lead-free photo-absorber layers of (CH3NH3)3Bi2I9, (CH3NH3)3Sb2I9, (CH3NH3)3SbBiI9, Ag3BiI6, Ag3BiI3(SCN)3 and Cu3BiI6 were processed by solution deposition way to be solar cells. About the structure of solar cells, we have compared the normal (n-i-p: TiO2-perovskite-spiro OMeTAD) and inverted (p-i-n: NiO-perovskite-PCBM) structures. The normal (n-i-p)-structured solar cells performed better conversion efficiencies, basically. But, these environmental friendly photon absorber layers showed the uneven surface morphology with a particular grow pattern depend on the substrate (TiO2 or NiO). We have considered that the unevenness of surface morphology can deteriorate the photovoltaic performance and can hinder future prospect of these lead-free photon harvesting layers. However, we found new interesting finding about the progress of devices by the interface of NiO/Sb3+ and TiO2/Cu3BiI6, which should be addressed in the future study.
Singh, Yanglem Herojit,Sharma, Susheel Kumar,Sinha, Bireswar,Baranwal, Virendra Kumar,Singh, N. Bidyananda,Chanu, Ngathem Taibangnganbi,Roy, Subhra S.,Ansari, Meraj A.,Ningombam, Arati,Devi, Ph. Sobit The Korean Society of Plant Pathology 2019 Plant Pathology Journal Vol.35 No.6
The genetic variability of 'Candidatus Liberibacter asiaticus' (CLas) population associated with huanglongbing (HLB) disease of citrus in North Eastern (NE) region of India, a geographically locked region, and home for the diversity of many citrus species was analyzed on the basis of tandem repeat numbers (TRN) in variable CLIBASIA_01645 genomic loci. Fifty-five CLas strains sampled from different groves of NE Hill (NEH) region of India were in single amplicon group, but there was remarkable genetic variability in TRNs. The TRN in HLB-associated CLas strains varied from 0-21 and two novel repeat motifs were also identified. Among the NE population of CLas, TRN5 and TRN9 were most frequent (total frequency of 36.36%) followed by TRN4 (14.55%) and TRN6, TNR7 with a frequency of 12.73% each. Class II type CLas genotypes (5 < TRN ≤ 10) had highest prevalence (frequency of 60.00%) in the samples characterized in present study. Class I (TRN ≤ 5) genotypes were second highest prevalent (29.09%) in the NEH region. Further analysis of genetic diversity parameters using Nei's measure (H value) indicated wide genetic diversity in the CLas strains of NE India (H value of 0.58-0.86). Manipur CLas strains had highest genetic variability (0.86) as compared to Eastern, Southern and Central India. The R10 values (TRN ≤ 10/TRN > 10) of NE CLas population was 10.43 (73/7), higher from other regions of India. Present study conclusively reported the occurrence of high genetic variability in TRN of CLas population in North East Indian citrus groves which have evolved to adapt to the specific ecological niche.
Shibayama Naoyuki,Kanda Hiroyuki,Yusa Shin-ichi,Fukumoto Shota,Baranwal Ajay K.,Segawa Hiroshi,Miyasaka Tsutomu,Ito Seigo 나노기술연구협의회 2017 Nano Convergence Vol.4 No.18
We confirmed the influence of ZnO nanoparticle size and residual water on performance of all inorganic perovskite solar cells. By decreasing the size of the ZnO nanoparticles, the short-circuit current density (Jsc) and open circuit photovoltage (Voc) values are increased and the conversion efficiency is improved. Although the Voc value is not affected by the influence of residual water in the solution for preparing the ZnO layer, the Jsc value drops greatly. As a result, it was found that it is important to use the oxide nanoparticles with a small particle diameter and to reduce the water content in the oxide forming material in order to manufacture a highly efficient all inorganic perovskite solar cells.
Amalendu Ghosh,Amrita Das,Ruben Lepcha,Kaushik Majumdar,V.K. Baranwal 한국응용곤충학회 2015 Journal of Asia-Pacific Entomology Vol.18 No.3
Darjeeling hills and Dooars of West Bengal (India) are well known for production of mandarin orange and lime. Citrus tristeza virus (CTV) is wide spread in this region. Role of insect vectors in spreading CTV in this region has not been studied so far. Therefore, a study on identification of insect vectors along with their temporal and spatial distributionwas undertaken. Five aphid species were identified fromcitrus orchards of Darjeeling and Dooars viz. Toxoptera citricida, T. aurantii, Aphis gossypii, Myzus persicae and Brachycaudus helichrysi. T. citricida was found predominant in the orchards of lower altitude and was responsible for maximum spread of CTV. T. aurantii was dominant in the citrus orchards at high altitude (N500 m). Incidence of CTV was higher in the orchards where T. citricida was present either alone or with other species. Under caged conditions, T. citricida was more efficient to transmit CTV than the other aphid species. Occurrences of all aphid species were highly influenced by the advent of new flushes.
Study of a novel phenolic-ester as antioxidant additive in lube, biodiesel and blended diesel
Raj K. Singh,Aruna Kukrety,Om P. Sharma,Siddharth Baranwal,Neeraj Atray,Siddharth S. Ray 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.37 No.-
A novel phenolic-ester denoted as Bz–4–tBz was synthesized by esterification reaction between the1,2,4,5-benzenetetracarboxylic acid and 3,5-di-tert-butyl-4-hydroxybenyl alcohol in N,N0-dimethyla-cetamide using N,N0-dicyclohexylcarbodiimide as catalyst. The Bz–4–tBz was evaluated as antioxidantin polyol by the rotatory bomb oxidation test while the Rancimat test were also done for evaluating theantioxidant potential in the biodiesel (B100) and blended diesel (B20). The RBOT time of polyol wasobserved to be increased from 6.72 min to 17.42 min when blended 2000 mg/kg Bz–4–tBz in it. Theoxidation stability of biodiesel (B100) and blended diesel (B20) was also found to be increased.
Yanglem Herojit Singh,Susheel Kumar Sharma,Bireswar Sinha,Virendra Kumar Baranwal,N. Bidyananda Singh,Ngathem Taibangnganbi Chanu,Subhra S. Roy,Meraj A. Ansari,Arati Ningombam,Ph. Sobita Devi,Ashis Ku 한국식물병리학회 2019 Plant Pathology Journal Vol.35 No.6
The genetic variability of ‘Candidatus Liberibacter asiaticus’ (CLas) population associated with huanglongbing (HLB) disease of citrus in North Eastern (NE) region of India, a geographically locked region, and home for the diversity of many citrus species was analyzed on the basis of tandem repeat numbers (TRN) in variable CLIBASIA_01645 genomic loci. Fifty-five CLas strains sampled from different groves of NE Hill (NEH) region of India were in single amplicon group, but there was remarkable genetic variability in TRNs. The TRN in HLB-associated CLas strains varied from 0-21 and two novel repeat motifs were also identified. Among the NE population of CLas, TRN5 and TRN9 were most frequent (total frequency of 36.36%) followed by TRN4 (14.55%) and TRN6, TNR7 with a frequency of 12.73% each. Class II type CLas genotypes (5 < TRN ≤ 10) had highest prevalence (frequency of 60.00%) in the samples characterized in present study. Class I (TRN ≤ 5) genotypes were second highest prevalent (29.09%) in the NEH region. Further analysis of genetic diversity parameters using Nei’s measure (H value) indicated wide genetic diversity in the CLas strains of NE India (H value of 0.58-0.86). Manipur CLas strains had highest genetic variability (0.86) as compared to Eastern, Southern and Central India. The R10 values (TRN ≤ 10/TRN > 10) of NE CLas population was 10.43 (73/7), higher from other regions of India. Present study conclusively reported the occurrence of high genetic variability in TRN of CLas population in North East Indian citrus groves which have evolved to adapt to the specific ecological niche.
Gallagher, S.J.,Reuning, L.,Himmler, T.,Henderiks, J.,De Vleeschouwer, D.,Groeneveld, J.,Rastegar Lari, A.,Fulthorpe, C.S.,Bogus, K.,Renema, W.,McGregor, H.V.,Kominz, M.A.,Auer, G.,Baranwal, S.,Casta& Elsevier 2018 Quaternary science reviews Vol.200 No.-
<P><B>Abstract</B></P> <P>Marine ooids are iconic indicators of shallow seawater carbonate saturation state, and their formation has traditionally been ascribed to physicochemical processes. The Indo-Pacific stands out as a region devoid of oolites, particularly during the Quaternary: the “ooid enigma”. Here we present results from recent coring by the International Ocean Discovery Program (IODP Expedition 356) off west Australia that shows that ooid horizons are common in Pleistocene strata up to 730,000 years old. Extensive “ooid factories” were created due to the presence of long-lived tidally influenced flat–topped tropical platforms suitable for intermittent ooid accretion over hundreds to thousands of years during highstands and times of lower sea level. This work suggests marine ooids may actually be more common in Indo-Pacific than previously reported. Past global ocean alkalinity was elevated during Pleistocene glacial periods and continental climate was generally more arid in the Indo-Pacific region compared to interglacials and the Holocene. Therefore, increased aridity associated with higher alkalinity conditions during the glacials facilitated ooid precipitation on adjacent tropical carbonate platforms particularly offshore from arid Australia. This confluence of factors suggests that more “ooid factories” may be encountered by further coring Indo-Pacific regions with Pleistocene flat long-lived carbonate shelves. However, Indo-Pacific Quaternary ooid occurrences outside Australia are rare, suggesting that the Northwest Shelf may be a unique archive of this non-skeletal precipitate. Further investigations into the petrography and geochemistry of pre-Holocene ooid occurrences will provide insights into their origin and the relative role of biotic, physicochemical and other factors in their formation.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Oolites are rare in the Indo-Pacific, particularly during the Quaternary: the “ooid enigma”. </LI> <LI> IODP Expedition 356 off west Australia cored common ooid horizons in strata up to 730,000 years old. </LI> <LI> Extensive “ooid factories” were deposited on tidally influenced flat–topped tropical platforms. </LI> <LI> Oolites were deposited during low and high sea levels in generally arid conditions. </LI> <LI> More “ooid factories” may be found by coring regions with flat long-lived carbonate shelves. </LI> </UL> </P>