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Effect of Bradyrhizobium japonicum on Chlorophyll Content, Nodulation, and Plant Growth in Soybean
Roshan Sharma Poudyal,B. N. Prasad 韓國作物學會 2005 Korean journal of crop science Vol.50 No.4
Study on effectiveness of Bradyrhizobium japonicum on soybean [Glycine max (L.) Merr.], local cultivar 'Sathiya' were carried out in the garden soil of Trib-huvan University. Different parameters like nodulation, chlorophyll content in fresh leaves and growth of plant in inoculated and uninoculated plant was studied. Pot experiment was conducted in the green house to evaluate the effectiveness of B. japonicum on soybean. It was observed that B. japonicum inoculation increased the number of nodules, shoot length of plant and total chlorophyll content in fresh leaves of soybean plant. However, root length was decreased in all inoculated plants.
Roshan Kumar Verma,Deepak Sarahan,Gautamjeet Raj Kumar 대한갑상선학회 2020 International Journal of Thyroidology Vol.13 No.2
Follicular variant of papillary carcinoma thyroid is an aggressive variant of papillary carcinoma thyroid. It is morecommonly associated with extrathyroidal extension and regional lymphadenopathy. It can rarely be associated withmicroscopic vascular invasion but tumor thrombus into great veins is a rare phenomenon. We present a caseof 60-year-old male with follicular variant of papillary carcinoma thyroid with tumor thrombosis in superior thyroidvein and internal jugular vein (IJV). We report a case of a 60-year-old male who presented with a large swellingin the lower part of left side of neck for 4 months. Clinical examination revealed a hard swelling of 12x8 cmin left side of neck. Ultrasonography showed a solitary thyroid mass of the left lobe and a dilated left superiorthyroid vein and ipsilateral IJV. Fine-needle aspiration cytology revealed follicular variant of PTC cells. Totalthyroidectomy was done. A tumor thrombus was discovered in the superior thyroid vein and left IJV was foundto be dilated. The left IJV with superior thyroid vein was ligated and excised. The patient recovered well afterthe operation with no local or distant metastasis detected. Follicular variant of PTC commonly spreads to the lymphnodes. Vascular spread via direct intravascular extension through superior thyroid vein is extremely rare. Onpalpation cord like IJV is felt on the involved side. Neck ultrasound play important role in the diagnosis. Aggressivesurgical treatment with IJV ligation above and below the tumor thrombus is recommended to minimize the riskof potentially fatal complications of the intraluminal masses. Intravascular tumor extension into IJV of neck infollicular variant of PTC is rare and can be associated with serious consequences. Total thyroidectomy withthrombectomy with ligation of IJV must be done.
A biopolymer mediated efficient synthesis of cyclic carbonates from epoxides and carbon dioxide
Roshan, Kuruppathparambil Roshith,Mathai, George,Kim, Juntae,Tharun, Jose,Park, Gyung-Ah,Park, Dae-Won The Royal Society of Chemistry 2012 Green chemistry Vol.14 No.10
<P>A promising application of carboxymethyl cellulose (CMC), which is a congener of the cellulose family, as a supporting material for a variety of imidazolium based ionic liquid catalysts in the chemical fixation of CO<SUB>2</SUB> has been studied here. The ionic liquids immobilized on the carboxymethyl cellulose (CMIL) showed high catalytic activity and selectivity in the cycloaddition of carbon dioxide with propylene oxide (PO) resulting in propylene carbonate (PC) under mild and solvent free conditions. A new pathway was proposed based on the density functional theory (DFT) calculations performed at the B3LYP/6-31G (d,p) level, where the carboxyl and hydroxyl moieties on the CMC were found to act synergistically with the halide ions to eventuate in the cycloaddition reaction. The carboxyl group entities on the carboxymethyl cellulose support supposedly stabilize the product complex <I>via</I> strong hydrogen bonds, thereby promoting the reaction. The catalyst system also displayed good reusability.</P> <P>Graphic Abstract</P><P>A DFT assisted study on the co-operative role of carboxyl groups on carboxymethyl cellulose in cycloaddition of CO<SUB>2</SUB> with epoxides. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c2gc35942a'> </P>
Roshan, K.,Jose, T.,Kim, D.,Cherian, K.,Park, D. Royal Society of Chemistry 2014 Catalysis Science & Technology Vol.4 No.4
A novel variety of ionic liquids based on naturally occurring amino acids is expeditiously synthesized in water using microwave energy. The amino acid ionic liquids (AAILs) exhibit eminent catalytic activities towards the synthesis of styrene carbonate from styrene oxide and carbon dioxide at atmospheric pressure. The synergistic interaction of the hydrogen-bonding groups with the nucleophile in the AAIL is believed to be the key factor behind the catalytic cycloaddition. Among the various kinds of AAILs tested, the basic AAILs were found to be the most efficient owing to the presence of extra amino groups that could activate the carbon dioxide molecule by formation of a carbamate salt. The AAILs showed appreciable reusability over four cycles without compromising the selectivity towards styrene carbonate synthesis and hence represents an easily synthesizable series of eco-friendly catalysts for CO2 fixation.
Roshan, Kuruppathparambil Roshith,Kim, Bo Mi,Kathalikkattil, Amal Cherian,Tharun, Jose,Won, Yong Son,Park, Dae Won The Royal Society of Chemistry 2014 Chemical communications Vol.50 No.89
<P>A novel application of alkanolamines, widely employed as CO<SUB>2</SUB> scrubbers in catalyzing the insertion of CO<SUB>2</SUB> into epoxides generating cyclic carbonates in excellent yield and selectivity <I>via</I> the synergistic activity of hydroxyl and amine groups, is unravelled along with computational studies.</P> <P>Graphic Abstract</P><P>A novel use of alkanolamines as catalysts for CO<SUB>2</SUB> conversion to cyclic carbonates under metal- and halide-free conditions. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c4cc04195j'> </P>
Roshan, Kuruppathparambil Roshith,Kathalikkattil, Amal Cherian,Tharun, Jose,Kim, Dong Woo,Won, Yong Sun,Park, Dae Won The Royal Society of Chemistry 2014 Dalton Transactions Vol.43 No.5
<P>Naturally occurring amino acids were identified as efficient co-catalysts for the alkali metal halide-mediated synthesis of cyclic carbonates from carbon dioxide and epoxides under mild, solvent free reaction conditions. The binary system of histidine/potassium iodide gave an appreciable turnover number of 535 for propylene oxide in 3 h. Detailed studies evaluating a variety of amino acids revealed that the basic amino acids afforded better conversion rates. The formation of a seven membered ring involving the zwitterionic ends of the amino acid, the metal halide, and the epoxide was considered to accelerate the catalysis rate. Density functional theory calculations were performed for the first time on amino acid co-catalyzed cycloaddition to provide further evidence for this hypothesis. The iodide ions of the alkali metal halide displayed excellent synergism with the hydrogen bonding groups of the amino acids in the production of cyclic carbonates, whereas bromide and chloride anions functioned less efficiently. The utilization of amino acids to enhance the catalytic activity of the cheap and eco-friendly alkali metal halides for cyclic carbonate synthesis represents a cost-effective, greener route towards the chemical fixation of carbon dioxide.</P> <P>Graphic Abstract</P><P>A DFT study of natural amino acid/KI catalyzed cyclic carbonate synthesis from carbon dioxide and epoxides under mild conditions. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c3dt52830h'> </P>
( Roshan Pradhan ),( Yong Il Kim ),( Jee Heon Jeong ),( Han Gon Choi ),( Chul Soon Yong ),( Jong Oh Kim ) 영남대학교 약품개발연구소 2015 영남대학교 약품개발연구소 연구업적집 Vol.25 No.-
Doxorubicin (DOX)-loaded water-in-oil-in-water (W/O/W) microemulsions were produced using a shirasu.porous.glass (SPG) membrane emulsification technique. Soybean oil was used as the oil phase; polyglycerol polyricinoleate (PGPR) or tetraglycerol polyricinoleate (TGPR) was used as the surfactant to stabilize the feed W/O emulsions, while Tween 20 was used in the external water phase to stabilize oil droplets containing water droplets. Increasing the feed pressure from 50 to 90 kPa increased the particle size of W/O/W emulsions, whereas it was decreased by increasing the agitator speed. The smallest particle sizes of multiple emulsions were obtained at the feed pressure of 50 kPa and agitator speed of 350 rpm. Under this set of conditions, the increase in the concentration of PGPR or TGPR showed a decrease in the particle size of DOX-loaded W/O/W emulsions. The optimized formulation comprising of 5% w/v PGPR and 3% w/v Tween 20 in the oil phase and external water phase, respectively, with 0.5% w/v of DOX had a particle size of 0.440 0.007 μm and polydispersity index of 0.220 0.087, which was supported by the transmission electron microscopy image. The formulations showed a sustained release profile in phosphate buffer solution (pH 7.4). The plasma concentrations of DOX after intravenous administration to rats were prolonged and gave approximately 17-fold higher area under the drug concentration.time curve (AUC) compared to free DOX solution. Thus, these results demonstrated that the SPG membrane emulsification technique could be used as a promising technique to prepare W/O/W microemulsions for delivering DOX with sustained release characteristics and better bioavailability.
Fabrication of a uniformly sized fenofibrate microemulsion by membrane emulsification
( Roshan Pradhan ),( Dong Won Lee ),( Han Gon Choi ),( Chul Soon Yong ),( Jong Oh Kim ) 영남대학교 약품개발연구소 2013 영남대학교 약품개발연구소 연구업적집 Vol.23 No.0
Fenofibrate-loaded microemulsions composed of Labrafil M 1944 CS, Capryol PGMC and fenofibrate as the dispersed phase and Labrasol in demineralised water as the continuous phase were prepared by utilising a Shirasu-porous-glass (SPG) membrane emulsification technique. The process parameters were optimised by adjusting the feed pressure (15-45 kPa), agitator speed (250-800 rpm) and temperature of the continuous phase (25-45°C). As a result, narrowly distributed microemulsions were obtained via SPG membrane emulsification at an agitator speed of 250 rpm, a feed pressure of 30 kPa and a continuous phase temperature of 25°C. Furthermore, TEM images clearly showed that the microemulsionprepared by SPG membrane emulsification had a uniform, spherical morphology with a narrow size distribution. Our results indicated that the SPGmembrane emulsification technique is highly efficient for the preparation of narrowly distributed microemulsions with relatively smaller particle sizes compared with the common stirring method.
COMINIMAXNESS OF LOCAL COHOMOLOGY MODULES WITH RESPECT TO IDEALS OF DIMENSION ONE
Roshan-Shekalgourabi, Hajar The Honam Mathematical Society 2018 호남수학학술지 Vol.40 No.2
Let R be a commutative Noetherian ring, a be an ideal of R and M be an R-module. It is shown that if $Ext^i_R(R/a,M)$ is minimax for all $i{\leq}{\dim}\;M$, then the R-module $Ext^i_R(N,M)$ is minimax for all $i{\geq}0$ and for any finitely generated R-module N with $Supp_R(N){\subseteq}V(a)$ and dim $N{\leq}1$. As a consequence of this result we obtain that for any a-torsion R-module M that $Ext^i_R(R/a,M)$ is minimax for all $i{\leq}dim$ M, all Bass numbers and all Betti numbers of M are finite. This generalizes [8, Corollary 2.7]. Also, some equivalent conditions for the cominimaxness of local cohomology modules with respect to ideals of dimension at most one are given.