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1.
Saudi J Biol Sci ; 27(12): 3514-3528, 2020 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-33304163

RESUMO

Pomegranate (Punica granatum L.) is an important fruit crop, rich in fiber, vitamins, antioxidants, minerals and source of different biologically active compounds. The bacterial blight caused by Xanthomonas axonopodispv. punicae is a serious threat to the crop leading to 60-80% yield loss under epiphytotic conditions. In this work, we have generated comparative transcriptome profile to mark the gene expression signatures during resistance and susceptible interactions. We analyzed leaf and fruits samples of moderately resistant genotype (IC 524207) and susceptible variety (Bhagawa) of pomegranate at three progressive infection stages upon inoculation with the pathogen. RNA-Seq with the Illumina HiSeq 2500 platform revealed 1,88,337 non-redundant (nr) transcript sequences from raw sequencing data, for a total of 34,626 unigenes with size >2 kb. Moreover, 85.3% unigenes were annotated in at least one of the seven databases examined. Comparative analysis of gene-expression signatures in resistant and susceptible varieties showed that the genes known to be involved in defense mechanism in plants were up-regulated in resistant variety. Gene Ontology (GO) analysis successfully annotated 90,485 pomegranate unigenes, of which 68,464 were assigned to biological, 78,107 unigenes molecular function and 44,414 to cellular components. Significantly enriched GO terms in DEGs were related to oxidations reduction biological process, protein binding and oxidoreductase activity. This transcriptome data on pomegranate could help in understanding resistance and susceptibility nature of cultivars and further detailed fine mapping and functional validation of identified candidate gene would provide scope for resistance breeding programme in pomegranate.

2.
Data Brief ; 33: 106472, 2020 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-33241092

RESUMO

We propose a dataset to investigate the relationship between the fill level of bottles and tiny machine learning algorithms. Tiny machine learning is represented by any Artificial Intelligence algorithm (spanning from conventional decision tree classifiers to artificial neural networks) that can be deployed into a resource constrained micro controller unit (MCU). The data presented has been originally collected for a joint research project by STMicroelectronics and Sesovera.ai. This article describes the recorded image data of bottles with 4 levels of filling. The bottles contain sodium chloride sterile liquid for intravenous administration. One subject of investigation using this dataset could be the classification of the liquid fill level, for example, to ease continuous human visual monitoring which may represent an onerous time-consuming task. Automating the task can help to increase the human work productivity thus saving time. Under normal circumstances, human visual monitoring of the saline level in the bottle is required from time to time. When the saline liquid in the bottle is fully consumed, and the bottle is not replaced or the infusion process stopped immediately, the difference between the patient's blood pressure and the empty saline bottle could cause an outward rush of blood into the saline.

3.
Phytopathology ; 110(4): 726-733, 2020 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-31898928

RESUMO

Pathogen secreted cell-wall-degrading enzymes (CWDEs) induce plant innate immune responses. The expression of rice transcription factor APETALA2/ethylene response factor-152 (OsAP2/ERF152) is enhanced in leaves upon treatment with different CWDEs and upon wounding. Ectopic expression of OsAP2/ERF152 in Arabidopsis leads to induction of immune responses such as callose deposition and upregulation of both salicylic acid- and jasmonic acid/ethylene-responsive defense genes. Arabidopsis transgenics expressing OsAP2/ERF152 exhibited resistance to infections caused by both bacterial and fungal pathogens (Pseudomonas syringae pv. tomato DC3000 and Rhizoctonia solani AG1-IA, respectively). Ectopic expression of OsAP2/ERF152 results in transient activation of mitogen-activated protein kinases 3/6 (MPK3/6), which could be leading to the induction of a broad range immunity in Arabidopsis.


Assuntos
Proteínas de Arabidopsis , Arabidopsis , Micoses , Expressão Ectópica do Gene , Regulação da Expressão Gênica de Plantas , Humanos , Doenças das Plantas , Pseudomonas syringae , Ácido Salicílico
4.
ACS Omega ; 4(13): 15348-15358, 2019 Sep 24.
Artigo em Inglês | MEDLINE | ID: mdl-31572833

RESUMO

Shape memory polymers (SMPs) are an exciting class of stimuli-responsive smart materials that demonstrate reactive and reversible changes in mechanical property, usually by switching between different states due to external stimuli. We report on the development of a polyurethane-based SMP foam for effective pressure redistribution that demonstrates controllable changes in dynamic pressure redistribution capability at a low transition temperature (∼24 °C)-ideally suited to matching modulations in body contact pressure for dynamic pressure relief (e.g., for alleviation or pressure ulcer effects). The resultant SMP material has been extensively characterized by a series of tests including stress-strain testing, compression testing, dynamic mechanical analysis, optical microscopy, UV-visible absorbance spectroscopy, variable-temperature areal pressure distribution, Fourier transform infrared spectroscopy, Raman spectroscopy, X-ray diffraction, differential scanning calorimetry, dynamic thermogravimetric analysis, and 1H nuclear magnetic resonance spectroscopy. The foam system exhibits high responsivity when tested for plantar pressure modulation with significant potential in pressure ulcers treatment. Efficient pressure redistribution (∼80% reduction in interface pressure), high stress response (∼30% applied stress is stored in fixity and released on recovery), and excellent deformation recovery (∼100%) are demonstrated in addition to significant cycling ability without performance loss. By providing highly effective pressure redistribution and modulation when in contact with the body's surface, this SMP foam offers novel mechanisms for alleviating the risk of pressure ulcers.

5.
Artigo em Inglês | MEDLINE | ID: mdl-30805314

RESUMO

Host- as well as parasite-specific factors are equally crucial in allowing either the Leishmania parasites to dominate, or host macrophages to resist infection. To identify such factors, we infected murine peritoneal macrophages with either the virulent (vAG83) or the non-virulent (nvAG83) parasites of L. donovani. Then, through dual RNA-seq, we simultaneously elucidated the transcriptomic changes occurring both in the host and the parasites. Through Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis of the differentially expressed (DE) genes, we showed that the vAG83-infected macrophages exhibit biased anti-inflammatory responses compared to the macrophages infected with the nvAG83. Moreover, the vAG83-infected macrophages displayed suppression of many important cellular processes, including protein synthesis. Further, through protein-protein interaction study, we showed significant downregulation in the expression of many hubs and hub-bottleneck genes in macrophages infected with vAG83 as compared to nvAG83. Cell signaling study showed that these two parasites activated the MAPK and PI3K-AKT signaling pathways differentially in the host cells. Through gene ontology analyses of the parasite-specific genes, we discovered that the genes for virulent factors and parasite survival were significantly upregulated in the intracellular amastigotes of vAG83. In contrast, genes involved in the immune stimulations, and those involved in negative regulation of the cell cycle and transcriptional regulation, were upregulated in the nvAG83. Collectively, these results depicted a differential regulation in the host and the parasite-specific molecules during in vitro persistence and clearance of the parasites.


Assuntos
Perfilação da Expressão Gênica , Interações Hospedeiro-Patógeno , Leishmania donovani/crescimento & desenvolvimento , Leishmania donovani/imunologia , Macrófagos Peritoneais/imunologia , Macrófagos Peritoneais/parasitologia , Análise de Sequência de RNA , Animais , Células Cultivadas , Biologia Computacional , Camundongos , Anotação de Sequência Molecular
6.
Am J Trop Med Hyg ; 99(5): 1162-1164, 2018 11.
Artigo em Inglês | MEDLINE | ID: mdl-30203740

RESUMO

The diagnosis of visceral leishmaniasis (VL) is one of the foremost barriers in the control of this disease, as demonstration of the parasite by splenic/bone marrow aspiration is relatively difficult and requires expertise and laboratory support. The aim of the present study was to find a noninvasive diagnostic approach using the existing recombinant kinesine-39 (rK-39) immunochromatographic nitrocellulose strips test (ICT) with a human sweat specimen for the diagnosis of VL. The investigation was carried out on specimens (blood, sweat, and urine) collected from 58 confirmed VL, 50 confirmed post kala-azar dermal leishmaniasis (PKDL), 36 healthy control, and 35 patients from other diseases. The data obtained from this study reveal that 96.6% clinically confirmed active VL participants were found to be positive when tested against a sweat specimen. Interestingly, the scenario was similar when tested against a blood specimen (96.6% positive by rK-39). Moreover, a test of both sweats and blood specimens from 50 PKDL participants resulted in 100% positivity, whereas no healthy control participants were found to be rK-39 positive. The sensitivity of the rK-39 ICT in sweat specimen was 94.7%, whereas the specificity was 100% in healthy controls from endemic, nonendemic, and other infectious diseases, respectively. No difference was observed in sweat specimen of VL and PKDL cases which signifies its reliability. However, further evaluation of this method on a larger scale could enhance the reliability of the proposed model so that it could be used efficiently in VL management and eradication.


Assuntos
Cromatografia de Afinidade/métodos , Testes Imunológicos/métodos , Leishmaniose Cutânea/diagnóstico , Leishmaniose Visceral/diagnóstico , Suor/parasitologia , Anticorpos Antiprotozoários/sangue , Cromatografia de Afinidade/instrumentação , Colódio , Humanos , Testes Imunológicos/instrumentação , Leishmaniose Cutânea/sangue , Leishmaniose Cutânea/urina , Leishmaniose Visceral/sangue , Leishmaniose Visceral/urina , Fitas Reagentes , Reprodutibilidade dos Testes , Sensibilidade e Especificidade
7.
Mater Sci Eng C Mater Biol Appl ; 91: 263-273, 2018 Oct 01.
Artigo em Inglês | MEDLINE | ID: mdl-30033255

RESUMO

Compression treatment for the patients with chronic disorders such as venous ulcers and varicose veins needs the proper and adequate level of pressure sustainability. This has been a great challenge for health practitioners and stocking manufacturers even till today. There is an imperious need of any research, where internal compression pressure can be controlled or readjusted externally. In line with this, for the first time this study is focused mainly to design and optimize the smart stocking structure by integrating the stress-memory polymeric filament as a main load bearing element. Six different structures were employed to prepare the stocking fabric tubes. All the structures were investigated for pressure analysis and studied the effect of physical parameters such as temperature, strain, and leg radius. It is possible to control the level of massage effect by varying the stocking structures. An empirical relationship is derived, which provides the knowledge for how to control the stocking pressure with structural modifications like never done before. The effect of massage function on blood flow velocity in the popliteal vein on lower limb was objectively measured by Doppler ultrasound scanning. This study also sheds the insight of stocking structural modification for pressure control and provide the benchmark for achieving the efficient compression. This advanced stress-memory polymeric filaments based multifunctional compression stocking provides static pressure, massage effect, and easy size fitting in a more controlled manner for smart compression therapy.


Assuntos
Massagem , Teste de Materiais , Polímeros , Meias de Compressão , Humanos , Pressão
8.
J Clin Diagn Res ; 11(7): ED31-ED32, 2017 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-28892918

RESUMO

A 47-year-old male presented with haematuria and flank pain for two weeks. Ultrasonography and renal scan revealed a poorly functioning left kidney with multiple calculi. Simple nephrectomy was performed and the specimen revealed a mass in his renal pelvis which showed both carcinomatous and sarcomatous components on microscopy. The sarcomatous component consisted of diffuse pleomorphic osteoblasts with intervening lacy osteoid, giving an osteosarcoma-like appearance. These areas of tumour were strongly positive for vimentin and osteopontin. The carcinomatous component was transitional cell carcinoma. Patchy areas of squamous cell carcinoma which were positive for pancytokeratin on immunostaining were also seen. Few weeks later, the patient presented with metastatic lesions in the sacrum. After nephrectomy, the patient underwent palliative radiotherapy of the spine followed by sunitinib therapy. A month later, there was recurrence at the site of surgery. The patient succumbed to his illness within five months of diagnosis. This report describes an extremely rare case of carcinoma, renal pelvis with predominantly osteosarcomatous areas.

9.
J Mater Chem B ; 5(10): 1905-1916, 2017 Mar 14.
Artigo em Inglês | MEDLINE | ID: mdl-32263944

RESUMO

Shape memory polymers are stimulus responsive smart materials that can be applied in several forms such as films, fibers, and foams for a wide range of applications. Novel stress-memory behavior at a fiber level is yet to be uncovered, which would be favorable to control stress in the broad horizon of smart materials for numerous functions. In this work, a semi-crystalline segmented polyurethane was synthesized to prepare filaments/fibres and films. A rational experimental design was established and the stress-memory behavior of both the films and filaments was systematically studied for comparison. Tensile stress-memory programming was performed at three strain levels (20%, 40%, and 60%) to record the memory stress response as a function of temperature with time. The characterization of the thermal and mechanical properties of the stress-memory programmed specimens has objectively proven the reason behind the higher stress response in the filaments than in the films. Melt spinning has induced perfect crystallization with ordered polymer packing and enabled maximum memory stress to be retrieved in the filaments. The evolution of memory stress follows a linear trend with an increase in strain and temperature (r2 = 0.91-1). In addition, pressure related studies were also carried out for smart filament integrative fabrics to realize stress-memory behavior. This unprecedented and novel approach of unveiling the memory behavior specifically at the filament level will enable material scientists to comprehend the fundamental aspects for precise optimization and control of memory stress in smart structures for applications such as compression stockings that require stimuli responsive force.

10.
J Clin Diagn Res ; 10(3): ED13-4, 2016 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-27134885

RESUMO

Fine Needle Aspiration (FNA) is a simple, inexpensive and innocuous diagnostic tool. It is increasingly accepted in daily medical practice. We report a case of Gaucher's disease diagnosed by FNA of enlarged spleen in a seven-year-old male presented with complaints of fever, on and off irregular bowel habits, abdominal distension and asymmetric gaze for four years and decreased vision in night for last one year. The diagnosis was based on the finding of large, macrophage like cells with abundant, pale, fibrillary cytoplasm and small nuclei. The patient had no family history of Gaucher's disease, and the diagnosis was not suspected clinically.

11.
Biomaterials ; 75: 174-181, 2016 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-26513411

RESUMO

Proper level of pressure or compression generated by medical stocking or hosiery is the key element for successful treatment or management of chronic venous disorders such as oedema, leg ulcers, etc. However achieving the recommended compression level and, more importantly, sustaining it using stockings has been a major challenge to the health practitioners supervising the treatment. This work aims to investigate and design a smart compression stocking using shape-memory polymer that allows externally controlling the pressure level in the wrapped position on the leg. Based on thermodynamical rubber theories, we first derived several criteria that have to be satisfied simultaneously in order to achieve the controlled pressure adjustment using external heat stimuli. We then presented a case where such a stocking is developed using a blend yarn consists of selected shape-memory polyurethane and nylon filaments. Extensive experimental work has also been conducted to demonstrate the feasibility and explore the influencing factors involved.


Assuntos
Polímeros/química , Meias de Compressão , Doenças Vasculares/terapia , Humanos , Dinâmica não Linear , Poliuretanos/química , Pressão , Estresse Mecânico , Temperatura , Fatores de Tempo
12.
Mater Sci Eng C Mater Biol Appl ; 57: 215-21, 2015 Dec 01.
Artigo em Inglês | MEDLINE | ID: mdl-26354257

RESUMO

BACKGROUND: Padding bandage is an essential component of the multi-layer compression system used for chronic venous management. Padding plays a critical role in managing pressure over bony prominences and ensuring uniform pressure distribution around the limb circumference. Moreover, it helps in the management of heat, moisture and body fluids or exudates during the course of treatment to provide comfort to the patients. OBJECTIVE: To study the effect of structural and constructional parameters on the compressional (pressure absorption or distribution) and comfort (air, moisture and heat transmission) characteristics of the padding. METHODS: This research focuses on the examination of polypropylene based nonwoven padding samples. Critical factors, i.e., fiber linear density, needling density and mass per unit area, have been chosen for this study to find their significance on the performance of padding. Simple laboratory based methods have been proposed to examine pressure reduction and comfort characteristics of the padding. RESULTS: Pressure absorption by the padding decreases with increase in mass per unit area and needling density of the padding. A padding composed of thicker fiber absorbs more pressure compared to padding made from thinner fiber. On examining comfort, it was found that the air and moisture vapor transmission increase with decrease in mass per unit area and needling density but have opposite effects with fiber linear density (p<0.01). The heat transmission decreases with increase in both mass per unit area and fiber linear density but has opposite effect for needling density. CONCLUSION: Padding composed of thick fiber with low mass per unit area and needling density could be more effective in pressure management and ensuring comfort. These results could be very useful for health practitioners, fabric engineers and manufactures to understand the significance of fibrous materials and their role in compression management, and could be further used as design consideration to optimized padding performance.


Assuntos
Bandagens Compressivas , Polipropilenos/química , Água/química , Absorção Fisico-Química , Ar , Módulo de Elasticidade , Desenho de Equipamento , Análise de Falha de Equipamento , Dureza , Teste de Materiais , Satisfação do Paciente , Permeabilidade , Pressão , Condutividade Térmica
13.
J Biomater Appl ; 30(5): 589-98, 2015 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-26228389

RESUMO

Padding is an essential component in a multilayer compression bandaging system, used inside the compression bandage through which substantial amount of pressure is exerted on the limb of patient for treatment of venous leg ulcers. As a result, the liquid transmission behavior of padding is also critical in managing body fluids or sweat exuded from the affected limb, reducing the excessive moisture build-up around the wound and thereby ensuring comfort to and hence a better compliance from the patients. This study investigates the in-plane fluid transport characteristics of needle-punched nonwoven padding bandages. It first reviewed the existing studies related to the problems, and discussed their limits and possible improvements in dealing with complex fluid transport issues in textile porous media. The measurement of fluid transport under different pressure levels was then done using a newly designed apparatus capable of simultaneously tracing the liquid in-plane spreading along different directions, and obtaining several transport characteristics of a testing sample, e.g. the liquid flow anisotropy, the rate of movement, the area of wet surface with time, etc. Also the effects of several important factors, such as the levels of pressure applied, the specimen bulk density, and needling density of the padding products, have been experimentally investigated. In addition, based on an extended Lucas-Washburn theory, we calculated the liquid flow distance, both instantaneous speed and a more useful time-averaged speed v(av) at any given direction, and also defined a flow anisotropy index I(A) as a convenient parameter to represent the material flow anisotropy. The applications of v(av) and I(A) to actual samples have demonstrated the usefulness of these parameters in characterizing the flow nature and behavior of the materials.


Assuntos
Bandagens Compressivas , Desenho de Equipamento , Hidrodinâmica , Teste de Materiais/instrumentação , Pressão , Molhabilidade
14.
J Clin Diagn Res ; 8(4): FD03-4, 2014 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-24959454

RESUMO

We report a rare case of virilizing cystic juvenile granulosa cell tumour of the ovary diagnosed by histopathological examination in a 17-year-old female presented with mass abdomen for two months, growing of the hairs on the face and abdomen and deepening of voice for one year.

15.
J Lab Physicians ; 5(1): 60-2, 2013 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-24014973

RESUMO

Schwannoma affect mainly head, neck, and flexor aspect of the limbs. Neurogenic tumors arising from the brachial plexus are rare and axillary schwannoma is extremely uncommon. Cystic degeneration is common in longstanding cases and which when aspirated may yield only macrophages or lymphocytes leading to false diagnosis of the case in spite of strong clinical suspicion. We report one such rare case of a solitary axillary schwannoma with extensive cystic degeneration, which was misdiagnosed on fine needle aspiration cytology and subsequently confirmed by the histopathological examination and immunohistochemistry.

16.
Biorheology ; 50(1-2): 83-94, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-23619155

RESUMO

BACKGROUND: Internal stress in a compression bandage wrapped over a limb in vitro is expected to reduce over time because of fatigue which may occur due to repetitive and prolonged variations in the extension of the bandage during posture change and exercise. This phenomenon may cause significant variation in the sub-bandage pressure over time. OBJECTIVE: To examine the effect of composition and construction of material on the sub-bandage pressure variation over time in the dynamic state of a limb in the laboratory. METHODS: Yarns comprising fibers of polyester, viscose, cotton and elastomeric yarn were used to prepare different knitted bandage samples having varying thread densities in the structure. A leg-segment prototype was used for the measurement of the interface pressure over a mannequin limb to analyse different bandages under similar dynamic conditions. RESULTS: The pressure drop in the dynamic state of the mannequin limb was greater than that in the static state. The mean pressure drop in 2 h in the dynamic state was greater by >30% for bandages made of pure cotton or viscose yarns than for bandages having elastomeric yarns in their structure. At the same applied tension, increasing the number of yarns per unit length in the bandage structure resulted in a smaller drop in pressure in the dynamic mode. CONCLUSION: Elastomeric yarn improves the elasticity and fatigue resistance of the bandage. Therefore, these yarns should be used in bandages to obtain sustained compression effects under dynamic conditions.


Assuntos
Bandagens Compressivas , Extremidades/irrigação sanguínea , Modelos Anatômicos , Doenças Vasculares/terapia , Humanos , Pressão , Estresse Mecânico
17.
Diagn Cytopathol ; 41(2): 150-2, 2013 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-21671412

RESUMO

We report a case of isolated cervical leishmanial lymphadenopathy diagnosed by fine-needle aspiration cytology (FNAC) in apparently cured case of visceral leishmaniasis. A 28-year-old female presented with cervical lymphnode enlargement to surgery outpatient department and was subjected for FNAC. Smear showed numerous Leishmania donovani bodies in the cytoplasm of macrophages and giant cells, and extracellular spaces. She was treated by Amphotericin B for alternate 14 days and the size of the lymphnode regressed. She was found asymptomatic for 1 year of follow-up.


Assuntos
Leishmaniose Visceral/patologia , Linfonodos/parasitologia , Doenças Linfáticas/parasitologia , Adulto , Anfotericina B/uso terapêutico , Antiprotozoários/uso terapêutico , Biópsia por Agulha Fina , Citoplasma/parasitologia , Intervalo Livre de Doença , Feminino , Células Gigantes/parasitologia , Células Gigantes/patologia , Humanos , Leishmania donovani , Leishmaniose Visceral/diagnóstico , Leishmaniose Visceral/tratamento farmacológico , Linfonodos/patologia , Macrófagos/parasitologia , Macrófagos/patologia , Pescoço , Recidiva , Resultado do Tratamento
18.
J Biomech Eng ; 134(9): 094501, 2012 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-22938375

RESUMO

Understanding the stress relaxation behavior of the compression bandage could be very useful in determining the behavior of the interface pressure exerted by the bandage on a limb during the course of the compression treatment. There has been no comprehensive study in the literature to investigate the pressure profile (interface pressure with time) generated by a compression bandage when applied at different levels of strain. The present study attempts to describe the pressure profile, with the use of a quasi-linear viscoelastic model, generated by a compression bandage during compression therapy. The quasi-linear viscoelastic (QLV) theory proposed by Fung (Fung, 1972, "Stress Strain History Relations of Soft Tissues in Simple Elongation," Biomechanics: Its Foundations and Objectives, Y. C. Fung, N. Perrone, and M. Anliker, eds., Prentice-Hall, Englewood Cliffs, NJ, pp. 181-207). was used to model the nonlinear time- and history-dependent relaxation behavior of the bandage using the ramp strain approach. The regression analysis was done to find the correlation between the pressure profile and the relaxation behavior of the bandage. The parameters of the QLV model, describing the relaxation behavior of the bandage, were used to determine the pressure profile generated by the bandage at different levels of strain. The relaxation behaviors of the bandage at different levels of strain were well described by the QLV model parameters. A high correlation coefficient (nearly 0.98) shows a good correlation of the pressure profile with the stress relaxation behavior of the bandage.The prediction of the pressure profile using the QLV model parameters were in agreement with the experimental data. The pressure profile generated by a compression bandage could be predicted using the QLV model describing the nonlinear relaxation behavior of the bandage. This new application of the QLV theory helps in evaluating the bandage performance during compression therapy as scientific wound care management.


Assuntos
Bandagens Compressivas , Elasticidade , Pressão , Modelos Lineares , Análise de Regressão , Viscosidade
19.
Bull Environ Contam Toxicol ; 89(2): 344-7, 2012 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-22729719

RESUMO

Cyhalofop-butyl is a recently registered herbicide from the aryloxyphenoxy propionate group in India to control a wide range of grass weed species at various growth stages in rice crop. Field experiment with rice variety Pusa Sugandh 5 was conducted at IARI, New Delhi. Rice crop was sprayed thrice with cyhalofopa-butyl at 40, 60 and 80 g ha(-1) at the 10, 20 and 30 DAS. Harvest soil samples were extracted and analysed for cyhalofop-butyl and cyhalofop acid residues by HPLC using CH(3)OH:H(2)O (80:20) mobile phase at a flow rate of 1 mL min(-1) at 240 nm wavelength using PDA detector. In harvest soil the residues were below the detectable limits.


Assuntos
Butanos/análise , Nitrilas/análise , Resíduos de Praguicidas/análise , Solo/análise , Butanos/metabolismo , Cromatografia Líquida de Alta Pressão , Produtos Agrícolas , Herbicidas/análise , Herbicidas/química , Índia , Nitrilas/metabolismo , Oryza , Solo/química
20.
Biorheology ; 49(1): 1-13, 2012.
Artigo em Inglês | MEDLINE | ID: mdl-22513864

RESUMO

The efficacy of compression therapy using compression bandages is highly dependent on the level of compression applied and the sustenance of the pressure during the course of treatment. This study attempts to predict the pressure profile generated by compression bandages using constitutive equations describing relaxation behavior of viscoelastic materials. It is observed that this pressure profile is highly correlated with the stress relaxation behavior of the bandage. To model the pressure profile, the stress relaxation behavior of compression bandages was studied and modeled using three mechanical models: the Maxwell model, the standard linear solid model and the two-component Maxwell model with a nonlinear spring. It was observed that the models with more component values explained the experimental relaxation curves better. The parameters used for modelling relaxation behavior were used to describe the pressure profile, which is significantly dependent on the longitudinal stress relaxation behavior of the bandage, using the modified Laplace's law equation. This approach thus helps in evaluating the bandage performance with time during compression therapy as novel wound care management.


Assuntos
Bandagens Compressivas , Doenças Linfáticas/terapia , Modelos Estatísticos , Doenças Vasculares/terapia , Pressão , Estresse Mecânico
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