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| 1 | A review on palaeogeographic implications and temporal variation in glaucony composition显示文摘This study presents a review on palaeogeographic implications and temporal variations of glaucony coveringboth modern and ancient records.Phanerozoic glaucony preferably forms in a shelf depositional setting.Deep marine conditions and low seawater temperature discourage formation of glaucony.Around 75%of glaucony is recorded from the Cretaceous to the Holocene sediments,which are related to the abundance of the most common substrates,faecal pellets and bioclasts.TFe_2O_3(total),Al_2O_3,K_2O and MgO contents of glaucony vary appreciably through geological time.While TFe_2O_3 content of most Mesozoic and Cenozoic glaucony exceeds 20%,it is always less than 20%in Precambrian varieties.High K_2O,Al_2O_3,MgO and low TFe_2O_3 distinguish the Precambrian glaucony from its Phanerozoic counterpart.Precambrian glaucony,preferably formed within a K-feldspar substrate,is always rich in potassium irrespective of its degree of evolution,while high K-content in Phanerozoic evolved glaucony indicates significant stratigraphic condensation.K_2O us.TFe_2O_3 relationship of glaucony exhibits three different evolutionary trends corresponding to three common modes of origin.Depositional conditions may influence the composition of glaucony as slightly reducing conditions favour Fe enrichment,whereas oxidising conditions cause Fe depletion in glaucony. | Santanu Banerjee Udita Bansal Anup Vilas Thorat | 2016 | Journal of Palaeogeography2016，5，1： | 10 |
| 2 | Origin and geochemical characterization of the glauconites in the Upper Cretaceous Lameta Formation, Narmada Basin, central India显示文摘This study presents geochemical characteristics of glauconites in estuarine deposits within the Maastrichtian Lameta Formation in central India. Resting conformably over the Bagh Group, the Lameta Formation consists of ~4-5 m thick arenaceous, argillaceous and calcareous green sandstones underlying the Deccan Traps. The sandstone is friable, medium-to coarse-grained, well-sorted and thoroughly crossstratified, and contains marine fossils. Detailed petrography, spectroscopy and mineral chemistry indicates unique chemical composition of glauconite with high K_2O, MgO, Al_2O_3 and moderate TFe_2O_3. Glauconite is formed by the replacement of K-feldspars, initially as stringers in the cleavages and fractures of feldspars. Incipient glauconite subsequently evolves fully, appearing as pellets. Fully-evolved glauconite pellets often leave tiny relics of K-feldspar. XRD exhibits characteristic peak of 10A from basal(001)reflection of glauconite, indicating the 'evolved' character. The K_2O content of glauconites in the Lameta Formation varies from 5.51% to 8.29%, corroborating the 'evolved' to 'highly-evolved' maturation stage.The TFe_2O_3 content of glauconite varies from 12.56% to 18.90%. The PASS-normalized-REE patterns of glauconite exhibit a 'hat-shape' confirming the authigenic origin of glauconites. The slightly-negative to slightly-positive Ce anomaly value and the moderate TFe_2O_3 content of glauconite agree well with a suboxic,estuarine condition. The replacement of K-feldspar by the glauconite contributes towards the high K_2O content. Compositional evolution of glauconites in the Lameta Formation is similar to those observed in many Precambrian sedimentary sequences. | Udita Bansal Santanu Banerjee Dhiren K.Ruidas Kanchan Pande | 2018 | Journal of Palaeogeography2018，7，2： | 3 |
| 3 | Lipid-polymer hybrid nanoparticles: Development & statistical optimization of norfloxacin for topical drug delivery system显示文摘Poly lactic acid is a biodegradable, biocompatible, and non-toxic polymer, widely used in many pharmaceuticalpreparations such as controlled release formulations, parenteral preparations, surgicaltreatment applications, and tissue engineering. In this study, we prepared lipid-polymer hybrid nanoparticlesfor topical and site targeting delivery of Norfloxacin by emulsification solvent evaporationmethod (ESE). The design of experiment (DOE) was done by using software to optimize the result, andthen a surface plot was generated to compare with the practical results. The surface morphology, particlesize, zeta potential and composition of the lipid-polymer hybrid nanoparticles were characterized bySEM, TEM, AFM, and FTIR. The thermal behavior of the lipid-polymer hybrid nanoparticles was characterizedby DSC and TGA. The prepared lipid-polymer hybrid nanoparticles of Norfloxacin exhibited anaverage particle size from 178.6 ± 3.7 nm to 220.8 ± 2.3 nm, and showed very narrow distribution withpolydispersity index ranging from 0.206 ± 0.36 to 0.383 ± 0.66. The surface charge on the lipid-polymerhybrid nanoparticles were confirmed by zeta potential, showed the value from t23.4 ± 1.5 mVto t41.5 ± 3.4 mV. An Antimicrobial study was done against Staphylococcus aureus and Pseudomonasaeruginosa, and the lipid-polymer hybrid nanoparticles showed potential activity against these two.Lipid-polymer hybrid nanoparticles of Norfloxacin showed the %cumulative drug release of 89.72% in24 h. A stability study of the optimized formulation showed the suitable condition for the storage oflipid-polymer hybrid nanoparticles was at 4 ± 2 C/60 ± 5% RH. These results illustrated high potential oflipid-polymer hybrid nanoparticles Norfloxacin for usage as a topical antibiotic drug carriers. | Vivek Dave Renu Bala Yadav Kriti Kushwaha Sachdev Yadav Swapnil Sharma Udita Agrawal | 2017 | Bioactive Materials2017，2，4： | 2 |
| 4 | Prevalence of depression in survivors of acute myocardial infarction显示文摘 | Brett D. Thombs PhD Eric B. Bass MD MPH Daniel E. Ford MD Kerry J. Stewart ED Konstantinos K. Tsilidis MPH Udita Patel MPH James A. Fauerbach PhD David E. Bush MD Dr. Roy C. Ziegelstein MD | 2006 | Journal of General Internal Medicine2006，，1： | 1 |
| 5 | Collagen fibril D-period may change as a function of strain and location in ligament显示文摘 | Udita Kukreti Stephen M Belkoff SM | 2000 | Journal of Biomechanics2000，，3： | 1 |
| 6 | 下一代CMOS纳米线:从原子级到电路级仿真显示文摘本文介绍了一个基于纳米线的环形振荡器电路的完整仿真流程,其中的有源器件运用了原子级器件模拟器对其进行了仿真。该仿真的结果已被证明适合于专门为纳米线/GAA环栅场效应晶体管(FET)制定的有源器件SPICE紧凑模型。最后,本文中把有源器件纳入SPICE网表,其中包括了后端电阻和电容寄生电阻。 | Udita Kapoor Sean CKelly Mark Townsend Derek Kimpton Eric Guichard 欧阳文捷 Sebastien Martini Thierry Poiroux Oliver Rozeau James Charles Daniel Lemus Tillmann Kubis | 2021 | 中国集成电路2021，30，9： | 0 |
| 7 | Assessment of malathion and its effects on leukocytes in human blood samples显示文摘In the present paper,we report a reproducible,cost effective,fast response method for detection of malathion and its effects on leukocytes in different human blood groups.Spectroscopic methods(UV-Vis spectrometry)and Fourier transform infrared coupled with solid phase extraction were applied for analyzing malathion content in human blood plasma.The spiking levels of malathion in the range of 0.1-1.7μg/mL were extracted from blood plasma samples using SPE.The present active functional groups(C=0;P-O-C;-OH;P=S)were also characterized.The recovery rate of malathion was 80%±4.5%.The calculated correlation coefficient was 0.9799,indicating the linearity of the results.The limit of detection(LOD)and limit of quantification(LOQ)were(0.1-1.7)μg/mL and(0.3-1.5)μg/mL,respectively.Malathion<1.0μg/mL showed no significant change while higher levels of malathion exposure(1.5μg/mL and 3.0|ig/mL)reduced the number of white blood cells.In conclusion,the spectroscopic results may be useful to understand the mechanism of other pesticides such as methyl parathion and parathion. | Amit Kumar Sharma Udita Tiwari Mulayam Singh Gaur Rajeev Kumar Tiwari | 2016 | The Journal of Biomedical Research2016，30，1： | 0 |
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