oalib

OALib Journal期刊

ISSN: 2333-9721

费用:99美元

投稿

匹配条件: “Manabendra” ,找到相关结果约25条。
列表显示的所有文章,均可免费获取
第1页/共25条
每页显示
A Comparative Study of Closure of Tympanic Membrane Perforation between Chemical Cauterization and Fat Plug Myringoplasty  [PDF]
Manabendra Debnath, Swagata Khanna
International Journal of Otolaryngology and Head & Neck Surgery (IJOHNS) , 2013, DOI: 10.4236/ijohns.2013.26052
Abstract:

The purpose of closure of small dry tympanic membrane perforations is to restore the continuity of the tympanic membrane in order to improve hearing and decrease the incidence of middle ear infections. Small and cost effective procedures like Chemical Cauterization and Fat Plug Myringoplasty have been found to be effective in healing small central perforations with significant hearing improvement. A study was carried out in 69 patients with central perforations in the Department of ENT, Gauhati Medical College & Hospital for the duration of 1 year from August 11 to July 12. Out of 69 patients, 36 underwent Chemical Cauterization and 33 Fat Plug Myringoplasty. Pre-and post-operative hearing assessments of each patient were done and statistically analyzed. The success rate was found to be 83.33% and 90.9% respectively. In both groups, there was statistically significant hearing improvement with a P value 0.01. From our study, it was found that the two procedures are simple, reliable and also lessened the morbidity of the patient. Thus we recommend the use of these two official procedures for the treatment of central perforations of tympanic membrane less than 5 mm.

SPONTANEOUS PNEUMOTHORAX SECONDARY TO COPD
MANABENDRA BISWAS
The Professional Medical Journal , 2007,
Abstract: Introduction: The high recurrence rate of spontaneous pneumothorax secondary to COPD highlightsthe need for the prevention of recurrence with cheap and cost effective method. Chemical pleurodesis with tetracyclinehydrochlorides may be a good option for the prevention of recurrence of pneumothorax and thereby enablessatisfactory patient outcome. Objectives: (i) To compare the recurrence rate of spontaneous pneumothorax treatedwith chemical pleurodesis with tetracycline hydrochloride and tube thoracostomy alone. (ii) To make a standard protocolfor management. Study design: A prospective randomized case control study. Setting: The dept. of thoracic surgeryof the National Institute of Diseases of the Chest and Hospital (NIDCH), Dhaka, Bangladesh. Period: From January2003 to December 2003. Material & Methods: Sixty patients with spontaneous pneumothorax, secondary to COPD.After randomization, 30 patients were treated with tube thoracostomy followed by pleurodesis with tetracyclinehydrochloride and another 30 patients of control group were treated with tube thoracostomy alone. Results: Patientswere followed up upto 6 months and were looked for recurrence. Patients with spontaneous pneumothorax were of4 to 6 decades of life and most of them were th th male. Most patients presented with moderate size of pneumothoraxand required 91-110 hours for lung expansion after tube thoracostomy. Recurrence rate of spontaneous pneumothoraxsecondary to COPD in the tetracycline group was 3.3%, whereas in control group it was 30%. Intrapleural instillationof tetracycline hydrochloride significantly reduces the recurrence of spontaneous pneumothorax secondary to COPD.(P=0.015). Morbidity related to tetracycline was negligible. Moreover, tetracycline is cheap, easily available, non-toxic, well tolerated. Conclusion: It is concluded that recurrence rate of spontaneous pneumothorax secondary to COPDcan be reduced effectively by chemical pleurodesis with tetracycline hydrochloride without any significant morbidity related to tetracycline hydrochloride and it is also very cost effective.
PHOTO-DEGRADATION OF WATER BORNE ACRYLIC COATED MODIFIED AND NON-MODIFIED WOOD DURING ARTIFICIAL LIGHT EXPOSURE
Manabendra Deka,Marko Petric
BioResources , 2008,
Abstract: A series of experiments were carried out to investigate photo-degradation of thermally modified (at 210oC and minus 0.9 bars for two hours) and non-modified spruce wood [Picea abies L (Karst)], coated with transparent and semitransparent (with 3% pigment content) acrylic coatings during artificial UV light irradiation for 200 hours. Photo-degradation was evaluated in terms of colour changes throughout the irradiation period at an interval of 50 hours, along with IR and EPR spectroscopic study. One set of modified and non-modified woods was painted with coatings, while the other set was covered with free films made of coatings, just to simulate coated wood. The colour changes for both modified and non-modified wood samples without paint-coat or free film cover were comparable to that of wood samples with paint-coat and free film cover for transparent coat type, which indicated its ineffective-ness to prevent photo-degradation of wood underneath. However, the colour changes for both modified and non-modified wood samples with paint-coat and free film cover were much lower than those of samples without paint-coat or free film cover for semitransparent coat type, which might be due to hindrance of transmission of light energy through pigment to reach the underlying wood surface. On the other hand, whole substrate-coating system showed better photo-stability, when thermally modified wood was used as substrate. However, the colour changes of paint-coated and free-film covered samples for both modified and non modified woods might be due to colour changes of wood specimen underneath, because free films of both the coat types showed negligible colour change during UV irradiation.
Performance of a Score-Stove with a Kerosene Burner and the Effect of Pressurization of the Working Fluid  [PDF]
Md Ehsan, Manabendra Sarker, Rifath Mahmud, Paul H. Riley
Journal of Power and Energy Engineering (JPEE) , 2015, DOI: 10.4236/jpee.2015.34063
Abstract:

Score-StoveTM a clean-burning cooking stove that also generates electricity was tested using a pressurized kerosene burner. The Score-Stove works on the principle of thermo-acoustics to gen- erate small-scale electricity. The device having hot-end, cold-end and regenerator acts in a way similar to a stirling cycle generating acoustic power, which is then converted to electricity using a linear actuator. It can supply small power for applications such as LED lighting, mobile phone charging and radios particularly in rural areas without grid electricity as well as improving house- hold air pollution. After assessing the needs of the rural communities through a survey, tea-stalls and small restaurants owners were identified as clients with the most potential of using the stove in Bangladesh. Bangladesh University of Engineering and Technology ((BUET) modified a Score- Stove to use both wood and a pressurized kerosene burner of a design that is widely used for cooking in rural areas of Bangladesh. The design was adapted to meet performance needs such as: heating rate, cooking efficiency, energy distribution, electric power generation, exhaust emissions and time taken to boil water using standardized water boiling tests. Performance was also compared with conventional (non-electrically generating) stoves that use a pressurized kerosene burn- er. The Score-Stove performance was then evaluated while increasing the pressure of the sealed working fluid (air in this case) from atmospheric to about 1.4 bar. The pressurization was found to almost double the power generation. An arrangement for utilizing cooling water waste heat was also devised in order to improve the thermal performance of the stove by 18%. Technical deficiencies are documented and recommendations for improvements and future research in order to obtain wider end-user acceptance are made.

Keratosis Follicularis Spinulosa Decalvans
Ramanan Cherukot,Ghorpade Ashok,Das Manabendra Nath
Indian Journal of Dermatology , 1998,
Abstract: A 22 year old girl with keratosis follicularis spinulosa decalvans (KFSD) is reported. The skin lesions and histopathological findings were classical.
IN VITRO PROPAGATION OF DIPTERIS WALLICHII (R.BR.) T. MOORE: A HOPE FOR CONSERVATION OF AN ENDANGERED PTERIDOPHYTE
Singha, Kh. Bharati,Dutta Choudhury,Manabendra,Mazumder
International Research Journal of Pharmacy , 2013, DOI: 10.7897/2230-8407.04346
Abstract: The pteridophytes include the fern and fern allies which jointly create the necessary environment for human life on earth with other green plants. Dipteris wallichii (R.Br.) T. Moore is a rare and endemic pteridophyte of North East India. It is also facing severe threats due to its habitat destruction. Tribals destroy the plant in large numbers for preparing their wine drinking pipes. An in vitro protocol for micropropagation of D.wallichii Moore was carried out using standard Murashige and Skoog medium for spore germination and further cell proliferation. It was observed that supplementation of phytohormones mainly auxins (Indole-3-Acetic Acid) were favourable for sporophyte development from prothallus. Further growth and differentiation of the prothallus and sporophyte were recorded for various hormone concentrations and combinations and was observed to be best in 0.15 mg/L IAA + 0.20 mg/L KIN.
“On-Water” Catalyst-Free Ecofriendly Synthesis of the Hantzsch Dihydropyridines
Amit Pramanik,Manabendra Saha,Sanjay Bhar
ISRN Organic Chemistry , 2012, DOI: 10.5402/2012/342738
Abstract:
“On-Water” Catalyst-Free Ecofriendly Synthesis of the Hantzsch Dihydropyridines
Amit Pramanik,Manabendra Saha,Sanjay Bhar
ISRN Organic Chemistry , 2012, DOI: 10.5402/2012/342738
Abstract: An eco-friendly “on-water” protocol for efficient catalyst-free synthesis of the Hantzsch dihydropyridines from aryl, heteroaryl, alkyl, and vinylogous aldehydes has been developed with minimum auxiliary substances, toxic reagents, organic solvents, and disposal problems. 1. Introduction 4-Substituted 1,4-dihydropyridine framework has emerged as one of the most prolific chemotypes in the recent computational analysis of medicinal chemistry database due to its multifarious pharmaceutical applications. They serve as important analogues of NADH coenzymes [1] exhibiting neuroprotectant [2] and platelet anticoagulatory activity [3]. These compounds often act as cerebral anti-ischemic [3] agents in the treatments of Alzheimer’s disease and as chemosensitizers [4] in tumour therapy. Due to their high efficiency as Ca2+ channel blockers, the Hantzsch dihydropyridines also find immense applications in the treatment of cardiovascular disorders and hypertension [5]. 1,4-Dihydropyridine skeleton is also present in many vasodilator, bronchodilator, antiatherosclerotic, antitumor, antidiabetic, geroprotective, and hepatoprotective agents. Moreover, these compounds serve as important synthetic intermediates [6, 7] for the preparation of various pyridine derivatives through oxidative aromatization sequences. A number of synthetic protocols for the construction of the dihydropyridine skeleton are available in the literature using ammonia [8], refluxing ammonium hydroxide in a closed vessel microwave synthesizer [9], urea-silica gel [10], ammonium acetate in ethanol under microwave irradiation [11], ammonium hydroxide in ethanol [12], 2,4,6-trichloro-1,3,5-triazine [13], magnesium nitride [14] in water at an elevated temperature in a sealed vessel using stoichiometric excess of organic reactants, and many others. Many of the aforesaid protocols use expensive and toxic reagents (often in excess amounts than required for reaction stoichiometry), have complicated reaction setup, require long reaction times, and form byproducts due to various side reactions. Often these reactions are performed in various organic solvents posing a serious threat of fire hazard, especially when they are carried out under microwave irradiation. Several solvent-free protocols [10] have been developed using supported reagents, but still they require toxic organic solvents during product isolation. Also the disposal of the left-over inorganic supports remains problematic [10] which causes perturbation in the environment. In recent times, ammonium acetate has been judiciously utilized [15, 16] as a
Ethnobotany of the Monpa ethnic group at Arunachal Pradesh, India
Nima D Namsa, Manabendra Mandal, Sumpam Tangjang, Subhash C Mandal
Journal of Ethnobiology and Ethnomedicine , 2011, DOI: 10.1186/1746-4269-7-31
Abstract: Field research was conducted between April 2006 and March 2009 with randomly selected 124 key informants using semi-structured questionnaire. The data obtained was analyzed through informant consensus factor (FIC) to determine the homogeneity of informant's knowledge on medicinal plants.We documented 50 plants species belonging to 29 families used for treating 22 human and 4 veterinary ailments. Of the medicinal plants reported, the most common growth form was herbs (40%) followed by shrubs, trees, and climbers. Leaves were most frequently used plant parts. The consensus analysis revealed that the dermatological ailments have the highest FIC (0.56) and the gastro-intestinal diseases have FIC (0.43). FIC values indicated that there was high agreement in the use of plants in dermatological and gastro-intestinal ailments category among the users. Gymnocladus assamicus is a critically rare and endangered species used as disinfectant for cleaning wounds and parasites like leeches and lice on livestocks. Two plant species (Illicium griffithii and Rubia cordifolia) are commonly used for traditional dyeing of clothes and food items. Some of the edible plants recorded in this study were known for their treatment against high blood pressure (Clerodendron colebrookianum), diabetes mellitus (Momordica charantia), and intestinal parasitic worms like round and tape worms (Lindera neesiana, Solanum etiopicum, and Solanum indicum). The Monpas of Arunachal Pradesh have traditionally been using Daphne papyracea for preparing hand-made paper for painting and writing religious scripts in Buddhist monasteries. Three plant species (Derris scandens, Aesculus assamica, and Polygonum hydropiper) were frequently used to poison fish during the month of June-July every year and the underground tuber of Aconitum ferrox is widely used in arrow poisoning to kill ferocious animals like bear, wild pigs, gaur and deer. The most frequently cited plant species; Buddleja asiatica and Hedyotis scandens
Systematic investigations on the reduction of 4-aryl-4-oxoesters to 1-aryl-1,4-butanediols with methanolic sodium borohydride
Subrata Kumar Chaudhuri,Manabendra Saha,Amit Saha,Sanjay Bhar
Beilstein Journal of Organic Chemistry , 2010, DOI: 10.3762/bjoc.6.94
Abstract: 4-Aryl-4-oxoesters undergo facile reduction of both the keto and the ester groups with methanolic NaBH4 at room temperature to yield the corresponding 1-aryl-1,4-butanediols whereas 4-alkyl-4-oxoesters furnish the corresponding 1,4-butanolides via selective reduction of the keto moiety. Results of a detailed and systematic investigation of the reaction are described.
第1页/共25条
每页显示


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.