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1.
ACS Omega ; 6(23): 14903-14910, 2021 Jun 15.
Artigo em Inglês | MEDLINE | ID: mdl-34151072

RESUMO

Manganese nodules from ocean bed are potential resources of Cu, Ni, and Co for which land-based deposits are scarce in India. The present work describes a novel approach of using glycerol, a nontoxic biomass-derived reductant, for the reductive acid leaching of manganese nodules. Parameters such as acid concentration, time, temperature, and pulp density were optimized for leaching. The optimal leaching conditions were found to be 10% (w/v) pulp density and 10% (v/v) H2SO4 at 80 °C with 1% (v/v) glycerol yielding >95% of Ni and >98% Cu, Co, and Mn extraction within an hour. Kinetic analysis of the data based on the initial rate method showed that the leaching process was chemical reaction-controlled with an apparent activation energy of 55.47 kJ/mol. Various oxidation intermediates of glycerol formed during leaching were identified using mass spectrometry and Raman spectroscopy, and a probable oxidation pathway of glycerol during the leaching process has been elucidated based on the analysis. Glycerol was oxidized to glyceraldehyde, glyceric acid, tartronic acid, dihydroxyacetone, hydroxy pyruvic acid, glyoxalic acid, oxalic acid, and finally converted to CO2 during leaching. The fast reaction kinetics, near-complete dissolution of manganese, and other associated metals in the nodule can be attributed to the participation of all intermediate products of glycerol oxidation in redox reactions with MnO2, enhancing the overall reduction leaching efficiency.

2.
Sci Rep ; 11(1): 191, 2021 01 08.
Artigo em Inglês | MEDLINE | ID: mdl-33420257

RESUMO

Micronutrient deficiencies and stunting rates are high in many low-income countries. Increasing and diversifying food intake are often challenging for small-scale farmers in lowland areas as flooding often results in crop losses and drowning of livestock. A cluster-randomised controlled trial was conducted over 12-months in Bangladesh, involving 150 small-scale duck rearing households, including 50 control, and 50 households each in two intervention arms. Interventions focussing on improving duck health and duck nutrition were applied on a village level. Data analysis focussed on assessing the impact of interventions on duck mortality, sales and consumption, and on dietary diversity of household members. Improved duck rearing increased the consumption and the sales of ducks. Household selling more ducks were more likely to purchase and consume milk products, contributing to an improved households' dietary diversity. Our results suggest that improving duck rearing can provide a suitable and sustainable alternative to maintain and improve dietary diversity of households in flood-prone areas.


Assuntos
Agricultura , Patos , Estado Nutricional , Animais , Feminino , Humanos , Masculino , Desnutrição/epidemiologia
3.
J Stroke Cerebrovasc Dis ; 29(8): 104957, 2020 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-32689603

RESUMO

INTRODUCTION: Clinical spectrum of Moyamoya angiopathy (MMA) differs across populations with different ethnicity. This study, the largest one done among Indian population was undertaken to assess clinico-radiological profile of MMA patients in eastern India. METHODS: A single centre cross-sectional study was undertaken among 76 MMA cases. Each patient was evaluated for epidemiological, clinical and radiological characteristics. SPSS 25 was used for statistical analysis. P < 0.05 was taken as statistically significant. RESULTS: 36 (47.4%) were children without gender preponderance. There were female predominance among adults (male:female = 1:2.33). Mean age at onset of first neurological symptoms for children was 4.2 ± 2.0years, followed by 34.9 ± 58.2months of latency with final diagnosis at the mean age of 7.4 ± 3.5years. For adults, mean age of onset of first neurological symptoms was 31.5 ± 12.3years, followed by 14.7 ± 41.7months time gap and diagnosed at the mean age of 33.5 ± 12.5years. There was a statistically significant difference between child and adult regarding the diagnostic latency (p = 0.035). Fixed motor weakness (FMW) was the predominant symptom across the whole disease course. Among children predominant first neurological symptom was fixed motor weakness (FMW) (52.8%), followed by seizures (22.2%). FMW was predominant (55%) first neurological complaint, followed by headache (22.5%) among adults. Seizure was more prevalent among children both as first (p = 0.002) and presenting symptom at the time of diagnosis (p = 0.048). Over the course of the disease seizure was more common among children (p = 0.001), while headache was more common among adults (p = 0.017). Recurrence of symptoms was more common among children (p = 0.059). Infarcts were more common among children (91.7%) than adults (72.5%), while hemorrhage was seen only among adults (25%) (p = 0.004). Isolated cerebral cortex was involved more commonly among children (59.4%) than adults (36.1%), while isolated subcortical involvement was seen only among adults (19.4%) (p = 0.016). Majority of the MMA cases were of Suzuki stage 4 (39.5%) and 5 (27.6%). Brain atrophy was associated with diagnostic latency (p = 0.009). CONCLUSION: Indian Moyamoya presents similar to disease presentation in Caucasian and Japanese patients. It is a frequently overlooked cause of stroke in young, often with various non-motor presentations, failure to recognize which leads to delay in diagnosis. Radiological burden disproportionate to number of acute vascular events, with subtle neurological manifestations like headache or seizure, often with cognitive decline, should raise suspicion of MMA.


Assuntos
Doença de Moyamoya/diagnóstico , Sistema Nervoso/fisiopatologia , Exame Neurológico , Avaliação de Sintomas , Adolescente , Adulto , Idade de Início , Criança , Pré-Escolar , Estudos Transversais , Diagnóstico Tardio , Feminino , Humanos , Índia/epidemiologia , Lactente , Masculino , Pessoa de Meia-Idade , Doença de Moyamoya/epidemiologia , Doença de Moyamoya/fisiopatologia , Sistema Nervoso/diagnóstico por imagem , Valor Preditivo dos Testes , Prevalência , Prognóstico , Fatores de Risco , Adulto Jovem
4.
J Neurol ; 266(11): 2838-2847, 2019 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-31422456

RESUMO

INTRODUCTION: Moyamoya angiopathy (MMA) is a rare cerebrovascular disease with progressive bilateral narrowing of intracranial parts of the internal carotid artery and proximal parts of the anterior and middle cerebral artery resulting in recurrent hemodynamic ischemic attacks, strokes and hemorrhages. If associated with other diseases, it is called Moyamoya syndrome (MMS). Until now, MMS has rarely been described with thalassemia. METHODS: Of the 75 cases of MMA collected in our Indian center in the last 3 years, 4 new patients with the rare cooccurence of thalassemia and MMS were found. Thalassemia cases were confirmed by hemoglobin electrophoresis and MMA was diagnosed on the basis of MR angiography. Other known secondary causes of MMA were ruled out by relevant investigations. Thirteen previously reported cases of thalassemia and MMA were retrieved by literature search in PubMed and Google Scholar using the keywords "Moyamoya" AND "thalassemia". Subsequently all the data were analyzed and compared by using descriptive statistics. RESULTS: Analysis of our 4 cases and those 13 found in the literature showed early childhood diagnosis of thalassemia and in most cases later manifestation of MMS in the age of 14.5 + 10.72 years (mean + SD) in our cases and with 10.97 + 6.47 years in previous cases. While 9 out of the former 13 and 3 of our 4 cases showed obvious infarcts in brain imaging, 1 case with HbE-ß-thalassemia presented with intracerebral hemorrhage. Hemiplegia/hemiparesis was present among all of our 4 cases, while it was present in 69.23% cases of the previous 13 reports. Neither transfusion dependence nor the history of splenectomy was found to be associated with MMA development. CONCLUSION: These four new cases of MMS in thalassemia enlarged our knowledge about MMS in patients with thalassemia. MMS is a relevant complication in patients with thalassemia and early detection is essential to avoid disability.


Assuntos
Doença de Moyamoya/etiologia , Talassemia/complicações , Adolescente , Adulto , Criança , Feminino , Humanos , Masculino
5.
Anim Biotechnol ; 30(4): 342-351, 2019 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-30444171

RESUMO

ABSTARCT The neuropeptide kisspeptin (Kp) through its receptor Kiss1r regulates the HPG axis by controlling GnRH release. Since buffalo is a seasonal breeder with problems of delayed puberty and postpartum anestrus, we characterized the Kiss1 and Kiss1r and investigated the immunolocalization in the hypothalamus and corpus luteum (CL). Kiss1 and Kiss1r genes were amplified from gDNA covering the coding region, cloned and sequenced with accession numbers MF168937 and MG820539, respectively. The Kiss1 DNA sequence had two exonic segment contained coding sequence (cds); 408 bp encoding a predicted protein of 136 aa with conservation of Kp-10 and shared 94.5-98.3% identity with ruminants. Kiss1r DNA sequence consisted of five exons with a cds of 1134 bp encoding a protein of 378 aa. Phylogenetic analysis of Kiss1 and Kiss1r revealed that it formed a monophyletic clade with cattle, which branched from sheep and goat. Immunofluorescence study revealed the presence of Kiss1 and Kiss1r in the neuronal soma and perinuclear area of preoptic and arcuate regions of the hypothalamus and luteal cells of the CL. This is the first report on molecular characterization of bubaline Kiss1 and Kiss1r genes that confirmed the presence of conserved Kp-10 like other ruminants and kisspeptinergic system is present in the hypothalamus and CL.


Assuntos
Búfalos/genética , Corpo Lúteo/metabolismo , Hipotálamo/metabolismo , Kisspeptinas/genética , Receptores de Kisspeptina-1/genética , Animais , Sequência de Bases , Búfalos/metabolismo , Feminino , Kisspeptinas/química , Kisspeptinas/metabolismo , Filogenia , Receptores de Kisspeptina-1/química , Receptores de Kisspeptina-1/metabolismo
6.
Vet Immunol Immunopathol ; 205: 65-71, 2018 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-30459003

RESUMO

Inflammatory markers of endometrial origin are valuable in order to differentiate the pyometra from cystic endometrial hyperplasia in the bitch. In the present study, we hypothesized that histological categorization would distinguish the differential regulation of the proinflammatory genes in the endometrium of bitches with pyometra. Ovariohysterectomy was done on bitches with confirmatory diagnosis of pyometra (n = 18). Using endometrium to myometrium ratio of 0.79 as threshold, the uteri (n = 8/group) were categorized into hyperplastic pyometra (HP) and atrophic pyometra (AP). Two samples were excluded as the diagnosis was inconclusive. In parallel, endometrial tissue was collected for total RNA extraction to study the differential expression of TLR4, IL-6, IL-8, COX-2 and PGFS through real time PCR. Diestrus uterus of non-pyometra bitches (n = 6) served as control. The mean fold change (2-ΔΔCt) for the target genes was determined using ß-actin as endogenous control and non-pyometra uterus as calibrator group. Except TLR4, other inflammatory genes were upregulated significantly by 1.82 to 3.74 times in the AP as compared to HP with maximum upregulation of COX-2 and PGFS. Further, correlation matrix with Spearman's rho revealed that IL-8 had strong positive correlation with COX-2 and PGFS in the AP group (P < 0.05). It is concluded that histological grading of pyometra into HP and AP revealed differential regulation of inflammatory cytokines and enzymes in the PG synthetic pathway in the canine endometrium that has diagnostic potential under clinical settings.


Assuntos
Citocinas/genética , Doenças do Cão/imunologia , Hiperplasia Endometrial/imunologia , Endométrio/imunologia , Prostaglandinas/genética , Animais , Ciclo-Oxigenase 2/genética , Cães , Feminino , Histerectomia , Inflamação , Interleucina-6/genética , Reação em Cadeia da Polimerase , Piometra/imunologia , Receptor 4 Toll-Like/genética , Regulação para Cima , Útero/imunologia
7.
J Phys Chem A ; 122(38): 7532-7539, 2018 Sep 27.
Artigo em Inglês | MEDLINE | ID: mdl-30180569

RESUMO

Tuning photoluminescence properties is of prime importance for designing efficient light emitting diode (LED) materials. Here, we perform a computational study on the effect of normal N-heterocyclic carbene (NHC) and abnormal mesoionic carbene (MIC) ligands on the photoluminescence properties of some Ir(III) complexes, which are very promising LED materials. We find MIC as the privileged ligand in designing triplet emitters. The strong σ-donating and moderate π-accepting properties of MIC render a lower access to the nonemissive triplet metal-centered state (3MC), resulting in lowering the nonradiative rate constant ( knr) and correspondingly achieving higher quantum efficiency. We also demonstrate that the judicial choice of ancillary ligand can improve the efficiency of these materials even further. This quantum chemical investigation focuses on the importance of MIC as cyclometalating ligand and the substantial effects of ancillary ligands in controlling the color tuning and quantum efficiency for optoelectronic applications.

8.
Phys Chem Chem Phys ; 19(43): 29629-29640, 2017 Nov 08.
Artigo em Inglês | MEDLINE | ID: mdl-29083423

RESUMO

We investigate, for the first time, a number of iridium(iii) complexes formed with an isomeric triazine based imidazolium carbene (imi-trzn) ligand and their corresponding photophysical properties for efficient blue organic light emitting diodes (OLEDs). In this process, we choose phenylpyridine or bipyridine as an ancillary ligand and vary the positions of the nitrogens in the other cyclometalated ligands, imi-trzn. Density functional theory (DFT) and time-dependent DFT have been employed to elucidate the effect of different isomers of the imi-trzn ligand on the emission color tuning and quantum efficiency. The different isomers of the cyclometalating ligand chelate with Ir(iii) through different coordinating sites and form cationic and neutral complexes. The results demonstrate that the complexes formed with an N-coordinating site of the ligand are more stable compared to the complexes formed through a C-coordinating site. However, the quantum efficiency shows a reverse trend. We further find that 3ILCT transition character along with some 3MLCT is required for the design of efficient phosphors with higher radiative and lower non-radiative decay rates. These results might be helpful for the design of novel and more efficient blue emitters for OLED applications using strategic modification of ligands.

9.
J Family Med Prim Care ; 6(1): 131-135, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-29026765

RESUMO

CONTEXT: Maternal anxiety has an association with low birth weight. However, studies are scarce to determine any association between maternal anxiety and fetal growth. AIMS: This study aims to determine the effect of maternal anxiety on fetal growth, measured by gestational age-dependent increase in fetal abdominal circumference (AC). The secondary objective is to determine the effect of maternal anxiety on other fetal parameters (biparietal diameter [BPD], head circumference [HC], femur length [FL]). SETTINGS AND DESIGN: This cross-sectional study was conducted in a tertiary care hospital, Kolkata. MATERIALS AND METHODS: Four hundred and ten pregnant mothers, between 14 and 40 weeks of gestation, were interviewed with socioeconomic and obstetric profile questionnaire and examined for anthropometric profile and presence and severity of pallor. Anxiety was assessed using Generalized Anxiety Disorder-7 (GAD) questionnaire. HC, AC, BPD, and FL were measured by ultrasound biometry. ANALYSIS USED: A multivariable logistic regression analysis was done to determine the predictors of small-for-gestational-age (SGA). A robust mediation analysis was done to determine mediating effect of anxiety on gestational age-dependent increase in fetal AC. RESULTS: Mild (odds ratio [OR]Adjusted = 6.23, [2.41, 16.15]) and moderate (ORAdjusted = 22.42, [5.00, 100.57]) anxiety was significantly associated with SGA fetus. Anxiety increased with the progression of gestation (ßGAD: 0.011 [0.007-0.015]) and it had a negative effect on fetal growth (standardized indirect effect of gestational age-mediated by anxiety on AC: -0.037 [-0.059, -0.022]). Anxiety also attenuated gestational age-dependent increment of HC. CONCLUSION: Mother's anxiety has a gestational age-dependent temporally incremental negative effect on fetal growth and brain development.

10.
Gene ; 581(1): 75-84, 2016 Apr 25.
Artigo em Inglês | MEDLINE | ID: mdl-26794448

RESUMO

BACKGROUND: Caveolin-1 (CAV1) is an important structural component of cellular caveolae involved in cell signaling. CAV1 gene on/off regulatory mechanism in multiple diseases, including cancer is not clearly understood. The tumor suppressor versus oncogene paradox of CAV1 during tumor development tempted us to investigate the role for the epigenetic drift of CAV1 gene regulation. METHODS: We have analyzed CAV1 gene expression and associated epigenetic marks (DNA methylation and histone 3 modifications) in the CAV1 promoter in two colon cancer cell lines, under treatment with well established epigenetic modulators, AZA, SAM, TSA and SFN at varying concentrations. CAV1 gene promoter DNA methylation and histone modifications were analyzed by DNA methylation specific PCR, bisulphite modification of DNA and ChIP analyses following PCR respectively. RESULTS: Ectopic expression of CAV1 by epigenetic modulators inhibits colon cancer cell growth. CAV1 promoter DNA remains unmethylated before and after treatment with epigenetic modulators, which confirmed that DNA methylation is not the regulator of CAV1 expression in colon cancer. There was enrichment of H3K4me3 and H3K9AcS10P and depletion of H3K9me3 modifications around the CAV1 promoter. CONCLUSIONS: Our data provides novel insight into the regulation of CAV1 gene by histone H3 modifications and enhance the amplitude of the cancer epigenome.


Assuntos
Caveolina 1/genética , Neoplasias do Colo/genética , Epigênese Genética , Histonas/metabolismo , Apoptose , Linhagem Celular Tumoral , Neoplasias do Colo/patologia , Ilhas de CpG , Epigênese Genética/efeitos dos fármacos , Humanos , Regiões Promotoras Genéticas
13.
Vet Res Commun ; 38(2): 171-6, 2014 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-24531997

RESUMO

Endometritis is one of the leading causes of infertility in the cattle and buffalo and innate immune mechanism plays an important role in clearing the infection. In this regard, endometrial expression and function of Toll Like Receptors (TLR) are focus of investigation in the recent years. In this study, we report the transcriptional profiles of TLR4 and 5 in the buffalo endometrium during the follicular, early, mid and late luteal phases of estrous cycle and 'subclinical and clinical endometritis' and also at true anestrus (n = 10 for each stage) using RT-PCR and qRT-PCR as they are the ligands for the lipopolysaccharide and flagellin components of E.coli, the most common cause of postpartum endometritis. We found a significant positive correlation between TLR4 and 5 in all the groups (r = 0.696-0.803; P < 0.05) except late luteal phase (r = 0.522; P > 0.05). Chi-square analysis showed that the qualitative expression of endometrial TLR4 and 5 transcripts was significantly associated with the phase of estrous cycle and also with uterine infection (P < 0.05). Further, using true anestrus category as a calibrator group, relative quantitation of TLR4 and 5 revealed that the transcriptional expression of TLR4 and 5 genes were highly upregulated (24.6-83.3 folds) during endometritis conditions and moderately upregulated during mid-luteal phase (6.8-16.2) of the estrous cycle (P < 0.05). The results suggested a role of progesterone in the expression of TLR4 and 5.


Assuntos
Búfalos/genética , Endométrio/fisiopatologia , Infecções por Escherichia coli/veterinária , Ciclo Estral/genética , Receptor 4 Toll-Like/genética , Receptor 5 Toll-Like/genética , Doenças Uterinas/veterinária , Animais , Endométrio/microbiologia , Endométrio/patologia , Infecções por Escherichia coli/genética , Infecções por Escherichia coli/imunologia , Infecções por Escherichia coli/microbiologia , Infecções por Escherichia coli/patologia , Feminino , Doenças Uterinas/genética , Doenças Uterinas/imunologia , Doenças Uterinas/microbiologia , Doenças Uterinas/patologia
14.
Trop Anim Health Prod ; 45(3): 805-10, 2013 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-23070685

RESUMO

A vast majority of the world buffalo resource is concentrated in tropical and subtropical countries. Apart from heat stress and poor nutritional availability, endometritis is one of the most commonly encountered reproductive problems limiting fertility and consequently productive potential of the species. As demonstrated recently, endometritis impairs growth and follicular fluid composition of the largest follicle in buffalo. In the present study, the effect of endometritis on luteal development, function, nitric oxide (NO), and ascorbic acid was investigated. Reproductive tracts were collected from 90 cyclic buffaloes at an abattoir and grouped into endometritic (n = 36) or non-endometritic (n = 54) buffaloes based on physical examination of uterine mucus, white side test, and uterine cytology. Samples with pus-containing mucus, positive reaction on white side test, and/or >5 % neutrophils were considered to be positive for endometritis. Corpora lutea were enucleated, weighed, classified into stages I to IV, and assayed for progesterone (P(4)), NO, and ascorbic acid concentrations. Endometritic buffaloes had lesser (P < 0.0001) luteal weight and P(4), NO, and ascorbic acid concentrations than non-endometritic buffaloes. The findings indicated that endometritis impairs corpus luteum development and function in buffalo. Reduced luteal NO and ascorbic acid concentrations during endometritis are novel findings.


Assuntos
Ácido Ascórbico/metabolismo , Búfalos , Corpo Lúteo/fisiopatologia , Endometrite/veterinária , Óxido Nítrico/metabolismo , Progesterona/metabolismo , Animais , Corpo Lúteo/crescimento & desenvolvimento , Corpo Lúteo/metabolismo , Endometrite/fisiopatologia , Feminino , Líquido Folicular/metabolismo , Folículo Ovariano/crescimento & desenvolvimento , Folículo Ovariano/metabolismo , Folículo Ovariano/fisiopatologia
15.
Trop Anim Health Prod ; 44(1): 125-31, 2012 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-21643661

RESUMO

The objective of this study was to examine the follicular characteristics and intrafollicular concentrations of nitric oxide and ascorbic acid during ovarian acyclicity in buffaloes. Ovaries were collected from 56 acyclic and 95 cyclic buffaloes at slaughter, surface follicle number was counted and follicles were classified into small (5.0-6.9 mm), medium (7.0-9.9 mm), and large (≥ 10.0 mm) size categories based on their diameter. Follicular fluid was aspirated and assayed for nitric oxide, ascorbic acid, estradiol, and progesterone. Acyclic buffaloes had a higher (P<0.05) number of medium-sized follicles and a lower (P<0.001) number of large follicles than the cyclic ones. In acyclic animals, the number of large follicles was lower (P<0.01) than in medium size category which in turn was lower (P<0.001) than the number of small follicles. In contrast, the number of medium and large follicles was not different (P>0.05) in the cyclic control. However, the number of small-sized follicles was higher (P<0.001) compared to the other two categories. The incidence of large-sized follicles was lower (P<0.05) in acyclic buffalo population compared to the cyclic control. Evaluation of estrogenic status demonstrated that all the follicles of acyclic buffaloes are estrogen-inactive (E (2)/P (4) ratio<1). Small- and medium-sized follicles of acyclic buffaloes had higher concentrations of nitric oxide (P<0.05 and P<0.001, respectively) and lower concentrations of ascorbic acid (P<0.05 and P<0.01, respectively) than the corresponding size estrogen-active follicles of their cyclic counterparts. In conclusion, this study indicates that follicular development continues during acyclicity in buffaloes. Although follicles in some acyclic buffaloes attain a size corresponding to morphological dominance, they are unable to achieve functional dominance, perhaps due to an altered balance of intrafollicular nitric oxide and ascorbic acid and, as a result, these follicles instead of progressing to ovulation undergo atresia.


Assuntos
Ácido Ascórbico/metabolismo , Búfalos/metabolismo , Ciclo Estral , Óxido Nítrico/metabolismo , Folículo Ovariano/anatomia & histologia , Folículo Ovariano/metabolismo , Animais , Búfalos/anatomia & histologia , Estradiol/metabolismo , Feminino , Líquido Folicular/química , Líquido Folicular/metabolismo , Tamanho do Órgão , Progesterona/metabolismo
16.
Vet Res Commun ; 34(6): 511-8, 2010 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-20582729

RESUMO

In the present study, changes in luteal fresh weight and concentration of collagen in cyclic buffalo corpus luteum were investigated at 4 stages of its growth and development/regression. The collagen concentration was determined by estimating hydroxyproline, a collagen specific amino acid present in luteal tissues. The mean fresh weight increased (P < 0.001) over the luteal phase, reached maximum at late-luteal stage and decreased (P < 0.001) subsequently at follicular stage. The weight of the mature CL was 2.5 times heavier than the CL haemorrhagicum and regressing CL. Results showed that cyclic buffalo CL contains collagen at all 4 stages of development during oestrous cycle. The collagen in luteal tissues constitutes about 0.9% to 1.2% of luteal fresh weight with the highest content appearing in mature tissue. The concentration of collagen increased (P < 0.001) with the stages of CL development over the luteal phase and the highest concentration was recorded at follicular phase with the decline of luteal weight. The total content of collagen per CL also showed the same trend during luteal phase but decreased at follicular phase with the loss of luteal tissues. In conclusion, collagen concentration in cyclic buffalo CL changes with the growth and development of CL across the oestrous cycle. The synthesis of collagen is faster between early- to mid-luteal stage than mid- to late-luteal stage.


Assuntos
Búfalos/fisiologia , Colágeno/metabolismo , Corpo Lúteo/metabolismo , Animais , Ciclo Estral/fisiologia , Feminino , Hidroxiprolina/metabolismo
17.
Indian J Gastroenterol ; 27(1): 22-8, 2008.
Artigo em Inglês | MEDLINE | ID: mdl-18541934

RESUMO

AIMS: To study the profile of irritable bowel syndrome (IBS), and the frequency of such symptoms among the general population, in India. METHODS: In this prospective, multi-center study, data were obtained from 2785 patients with chronic lower gastrointestinal symptoms (complainants) with no alarm feature and negative investigations for organic causes visiting physicians at 30 centers, and from 4500 community subjects (non-complainants), using separate questionnaires. RESULTS: Most complainants were middle-aged (mean age 39.4 years) and male (1891; 68%). The common symptoms were: abdominal pain or discomfort (1958; 70%), abdominal fullness (1951; 70%); subjective feeling of constipation (1404 of 2656; 53%), or diarrhea (1252 of 2656, 47%), incomplete evacuation (2134; 77%), mucus with stools (1506; 54%), straining at stools (1271; 46%), epigastric pain (1364; 49%) and milk intolerance (906; 32%). Median stool frequency was similar in patients who felt they had constipation or those who felt they had diarrhea. Information to subtype symptoms using standard criteria was available in 1301 patients; of these, 507 (39%) had constipation-predominant IBS ( 3 3 stools/day) and 744 (57%) had indeterminate symptoms. Among non-complainants, most subjects reported daily defecation frequency of one (2520 [56%]) or two (1535 [34%]). Among non-complainants, 567 (12.6%) reported abdominal pain, 503 (11%) irregular bowel, 1030 (23%) incomplete evacuation, 167 (4%) mucus and 846 (18%) straining at stools; a combination of abdominal pain or discomfort relieved by defecation, and incomplete evacuation was present in 189/4500 (4.2%) community subjects. CONCLUSIONS: Most patients with IBS in India are middle-aged men, and have a sense of incomplete evacuation and mucus with stools. Abdominal pain or discomfort is frequent but not universal. Importantly, stool frequency was similar irrespective of whether the patients felt having constipation or diarrhea. Most (90%) non-complainant subjects had 1 or 2 stools per day; symptoms complex suggestive of IBS was present in 4.2% of community subjects.


Assuntos
Síndrome do Intestino Irritável/epidemiologia , Adulto , Feminino , Gastroenterologia , Humanos , Índia/epidemiologia , Síndrome do Intestino Irritável/fisiopatologia , Masculino , Estudos Prospectivos , Sociedades Médicas
18.
Org Lett ; 9(3): 401-4, 2007 Feb 01.
Artigo em Inglês | MEDLINE | ID: mdl-17249772

RESUMO

[reaction: see text] The syntheses of bicyclic diaminopyridines 3 and 4 and tricyclic triaminopyridines 5 and 6, two novel series of nucleophilic catalysts, are described. Arguments are made for predicting the superiority of these catalysts over DMAP and even 2, the best esterification catalyst reported to date. The efficiencies of DMAP, PPY, and 2-6 in catalyzing the esterification of tertiary alcohols were compared. As predicted, 5 and 6 were about 6-fold more effective than DMAP and slightly better than 2.


Assuntos
4-Aminopiridina/análogos & derivados , Bloqueadores dos Canais de Potássio/síntese química , 4-Aminopiridina/análise , 4-Aminopiridina/síntese química , Álcoois/química , Catálise , Ésteres/química , Cinética , Ligantes , Modelos Químicos , Estereoisomerismo
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