Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 86
Filtrar
1.
Trop Anim Health Prod ; 55(2): 131, 2023 Mar 24.
Artículo en Inglés | MEDLINE | ID: mdl-36964324

RESUMEN

The present study was designed to assess the interrelationship between hematological, serum biochemical, and endocrinological profiles and oxidative stress markers and lactational stages in crossbred (CB) dairy cows of Andaman and Nicobar Islands (ANI). Healthy (n = 6) CB cows (50-62.50% exotic inheritance; Holstein Friesian × Andaman local) of 4th parity with age of 7-9 years and body weight of 350-400 kg were selected from Cattle Breeding Farm, ICAR-Central Island Agricultural Research Institute (ICAR-CIARI), Port Blair, ANI. These experimental cows were synchronized with Ovsynch protocol, and parturition was planned to happen in the month of May-June. Lactation was allowed for 305 days. Hematological profiles, serum biochemical profiles, oxidative stress markers and endocrinological profiles were measured at a 15-day interval from day 07 to 305 of lactation (after 6 days of colostrum). The lactation period was divided into first (day 07 to 90), second (day 91 to 180), and third (day 181 to 305) stage of lactation. Average daily milk yield (L) did not vary among the stages of lactations; however, first (8.56 ± 1.26) and second (9.79 ± 0.87) stages had higher milk yield compared to third (7.93 ± 0.79) stage of lactation. Hematological profiles did not vary among the stages of lactation; however, these values were within the range of bovine species at lactation. Serum glucose, triglyceride, total cholesterol, total protein, globulin, and blood urea nitrogen (BUN) increased (P < 0.05) and albumin and creatinine decreased (P < 0.05) gradually as lactation stages advanced. Activity of aspartate aminotransferase (AST), alanine aminotransferase (ALT), and alkaline phosphatase (ALP) and concentration of calcium, phosphorous, and magnesium were nearly similar among the stages of lactation. Similarly, triiodothyronine (T3), and thyroxine (T4) increased and prolactin and cortisol decreased (P < 0.05) gradually as stages of lactation advanced. Total antioxidant capacity (TAC) increased and malondialdehyde (MDA) decreased (P < 0.05) as lactation stages advanced. The results of the present study indicated that the lactating CB cows suffered nutritional stress (deficiency of protein, carbohydrate, lipids, and minerals), physiological stress (higher cortisol), oxidative stress (higher MDA and deficiency of total antioxidant capacity), and hormonal imbalance (higher prolactin and cortisol and deficiency of thyroid hormones) during the early stages of lactation. Thus, the first and second stages are more stressful events compared to the third stage of lactation in the CB cows in ANI. Therefore, regular monitoring of blood components and accordingly suitable feeding strategies with balanced nutrients and minerals, supplementation of suitable antioxidants, and appropriate management practices need to be implemented to mitigate these stresses and to prevent metabolic disorders with maximum milk production during different stages of lactation in CB cows under humid tropical island ecosystem of Andaman and Nicobar Islands.


Asunto(s)
Antioxidantes , Lactancia , Embarazo , Femenino , Bovinos , Animales , Lactancia/fisiología , Antioxidantes/metabolismo , Hidrocortisona , Prolactina/metabolismo , Ecosistema , Complejo Hierro-Dextran/metabolismo , Leche/metabolismo , Estrés Oxidativo
2.
Reprod Biol ; 23(1): 100730, 2023 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-36640628

RESUMEN

Teressa goat is a unique goat breed in Andaman and Nicobar Islands (ANI) of India. Effects of Flaxseed oil (FSO) supplementation in body weight (BW), scrotal circumference (SC), testicular volume (TV) and testicular weight (TW), endocrinological profiles, sex behavioural profiles (SBPs), oxidative stress markers and semen production and its quality profiles in rainy and dry summer season were studied in Teressa goat. Male goats (n = 12) of 3-4 years old were equally divided into control and treated groups. Treated animals received 25 mL FSO per day. Oral drenching of FSO was done in the morning before feeding the concentrate ration. Body weight, scrotal circumference, TV and TW were measured in bucks of FSO treated and untreated during rainy and dry summer seasons. Blood follicle stimulating hormone (FSH), luteinizing hormone (LH), testosterone, thyroid stimulating hormone (TSH), triiodothyronine (T3), thyroxine (T4), cortisol and prolactin, total antioxidant capacity (TAC), superoxide dismutase (SOD), catalase (CAT), glutathione (GSH) and malondialdehyde (MDA) were measured in bucks of FSO treated and untreated during rainy and dry summer seasons. Libido score (LS), mating ability score (MAS) and sex behavioural score (SBS) were estimated at time of semen collection in bucks of FSO treated and untreated during rainy and dry summer seasons. Semen samples (n = 100; 50 semen samples from each season; each 25 semen samples from control and treatment groups per season) were collected and analysed for semen quality profiles. One-way ANOVA (control rainy, control dry, treated rainy and treated dry) revealed that BW, SC, TV and TW, FSH, LH, testosterone, TSH, T3 and T4 were higher (P < 0.05) and cortisol and prolactin were lower (P < 0.05) in FSO treated bucks of rainy season followed by untreated bucks of rainy season, FSO treated bucks of dry summer season and were lower (P < 0.05) in untreated bucks of dry summer season. Similarly, TAC, CAT, SOD and GSH, LS, MAS and SBS, and volume, pH, sperm concentration, mass activity, total motility (TM), viability, acrosomal integrity (AcI), plasma membrane integrity (PMI) and nuclear integrity (NI) were higher (P < 0.05) and MDA and TSA were lower (P < 0.05) in FSO treated bucks of rainy season followed by FSO treated bucks of dry summer season, untreated bucks of rainy season and were lower (P < 0.05) in untreated bucks of dry summer season. The results of the present study indicated that the breeding bucks suffered physiological stress (higher cortisol), oxidative stress (higher MDA and deficiency of antioxidants), hormonal imbalance (higher prolactin and cortisol and deficiency of gonadotropins, gonadal hormone and thyroid hormones) and infertility due to poor libido and poor semen production and its quality profiles during dry summer season. Thus, dry summer was more stressful season compared to rainy season for the goat bucks. FSO supplementation mitigated these stresses and improved the scrotal and testicular biometrics, libido, antioxidants, hormones and semen quality profiles in Teressa goat bucks. The current study concluded that FSO effectively improved the hormones, libido, antioxidant profiles, and scrotal and testicular biometrics with cascading beneficial effects on semen quality profiles in Teressa goat bucks under humid tropical island ecosystem of Andaman and Nicobar Islands.


Asunto(s)
Análisis de Semen , Semen , Animales , Masculino , Antioxidantes/farmacología , Aceite de Linaza/farmacología , Espermatozoides , Hidrocortisona , Libido , Prolactina , Cabras/fisiología , Ecosistema , Islas , Testosterona , Estaciones del Año , Hormona Folículo Estimulante/farmacología , Hormona Luteinizante , Biometría , Tirotropina/farmacología , Peso Corporal
3.
Theriogenology ; 166: 46-54, 2021 May.
Artículo en Inglés | MEDLINE | ID: mdl-33684782

RESUMEN

Mithun (Bos frontalis) is a unique domestic free-range bovine species available in North Eastern hilly (NEH) regions of India and is reared for its protein rich meat. Mithun suffers severe non-cyclical population fluctuations; however, it is not yet declared as endangered species. Mithun follows some sort of seasonality based on the calving trend and semen production, although it is a perennial breeder. However, there is need to study the rhythmic changes of endocrine profiles to understand the hormone flow pattern in mithun to select the suitable time for blood collection to assess the exact endocrine profiles and to select the suitable time for natural breeding or semen collection by artificial methods for further research, conservation and propagation of its germplasm. Therefore, the present study was designed to evaluate the reproductive as well as metabolic endocrinological profiles in 24:00 h in intact adult mithun bulls during different seasons (winter, spring, summer and autumn) to know the rhythmic changes and flow pattern of the endocrinological profiles to improve its reproductive efficiency. Experimental mithun bulls (n = 6; age: 5-6 years; body condition score: 5-6 out of 10, classified as good) were selected for the study. Endocrinological profiles, follicle stimulating hormone (FSH), luteinizing hormone/interstitial cell stimulating hormone (LH/ICSH), testosterone, cortisol, thyroxine (T4), insulin like growth factor-1 (IGF-1), prolactin and melatonin (MT) were estimated at 04:00 h interval for one whole day in four seasons. The analysis was completed in two different ways as different times of collection (08:00, 12:00, 16:00, 20:00, 24:00 and 04:00 h) and day (08:00 to 16:00 h) & night time (20:00 to 04:00 h) collections. Repeated measures ANOVA analysis revealed that the bulls in winter and spring had significantly (p < 0.05) higher FSH, LH, testosterone, T4, IGF-1 and MT than those in summer whereas the bulls in summer had significantly higher cortisol and prolactin than those in winter and spring seasons. Similarly FSH, LH, testosterone, T4, IGF-1 and MT were significantly (p < 0.05) higher in night than in day time collections whereas cortisol and prolactin were significantly (p < 0.05) higher in day than in night time collections in different seasons. Correlation analysis revealed that FSH, LH, testosterone, T4, IGF-1 and MT had significant (p < 0.05) positive correlation with each other whereas these had significant (p < 0.05) negative correlation with cortisol and prolactin. The study concludes that season and time of blood collection had significant effect on the endocrinological profiles in mithun bulls. Estimation of FSH, LH, testosterone, T4, IGF-1 and MT during night time and cortisol and prolactin during day time was more appropriate to get correct value of the endocrinological profiles. Spring and winter have significantly greater beneficial effects than summer on reproduction and artificial breeding programs in mithun species in the semi-intensive management in the present location.


Asunto(s)
Hormona Folículo Estimulante , Hormona Luteinizante , Animales , Bovinos , India , Masculino , Prolactina , Estaciones del Año , Semen , Testosterona
4.
Theriogenology ; 154: 1-10, 2020 Sep 15.
Artículo en Inglés | MEDLINE | ID: mdl-32470703

RESUMEN

Mithun (Bos frontalis) is a unique domestic free-range bovine species available in North Eastern hilly (NEH) regions of India and is reared for its protein rich meat. Although, mithun suffers from severe non-cyclical population fluctuations, it is not yet declared as endangered. Therefore, present study was conducted to assess the effect of slow release subcutaneous exogenous melatonin (MT) implant on sexual behaviour, scrotal circumference (SC) and testicular parameters, endocrinological profiles and antioxidant and oxidative stress profiles in mithun during different seasons (winter, spring, summer and autumn) to improve its reproductive efficiency. Experimental mithun bulls (5-6 years of age) were selected and divided randomly into two groups, Gr I: Control (n = 6) and Gr II: Treatment (n = 6; melatonin implant @ 18mg/50 kg B. Wt). Scrotal circumference and testicular parameters [total testicular volume and weight], endocrinological profiles [follicle stimulating hormone (FSH), luteinizing hormone/interstitial cell stimulating hormone (LH/ICSH), testosterone, thyroxine (T4), cortisol, prolactin and melatonin (MT)], sex behaviour profiles [libido score, mating ability score and sexual behaviour score], antioxidant profiles [total antioxidant capacity (TAC), catalase (CAT), glutathione (GSH), glutathione reductase (GSHRx) and superoxide dismutase (SOD)] and oxidative stress profile [malondialdehyde (MDA)] were estimated. Statistical analysis revealed that these experimental profiles differed between treatment and control groups within the seasons and among the seasons within the experimental groups. FSH, LH, testosterone, T4 and MT were higher and cortisol and prolactin were lower in spring and winter than in summer season. Concentration of FSH, LH, testosterone and MT were higher and concentration of T4, cortisol and prolactin were lower in MT treated than in untreated control group. Similarly, sexual behavioural scores, SC, testicular parameters and antioxidant profiles were higher and oxidative stress profile was lower in MT treated than in untreated control group and in winter and spring than in summer season. The study concluded that exogenous slow-release melatonin implantation and spring and winter seasons had significant beneficial effects in improvement of the antioxidant profiles, minimization of oxidative stress with cascading beneficial effects on endocrinological profiles, SC, testicular parameters and libido, which will improve the semen production, higher sperm cryo-survivability and fertility rate in mithun species.


Asunto(s)
Melatonina , Animales , Antioxidantes , Bovinos , India , Libido , Masculino , Melatonina/farmacología , Estrés Oxidativo , Estaciones del Año , Testículo , Testosterona
5.
Protein J ; 39(3): 291-300, 2020 06.
Artículo en Inglés | MEDLINE | ID: mdl-32124138

RESUMEN

For proteome analyses, the tissue samples are mostly preserved either snap frozen or formalin-fixed, paraffin-embedded form. Use of RNAlater-a non-toxic solution primarily used to stabilize the RNA content of samples-in tissue preservation for proteome analysis recently described equally reliable with snap-frozen preservation in human tissues. Even though RNALater storage has great potential in the preservation of Peripheral Blood Mononuclear Cells (PBMC), its impact on the results of proteome analysis is poorly described at qualitative and quantitative measures. The present study investigated protein profiles of RNAlater preserved and fresh PBMCs using three extraction buffers viz. Triton X-100, RIPA and SDS. Proteins are separated in SDS-PAGE and quantified using densitometry. On an average 19.3 bands from fresh and 15.6 bands from RNAlater storage cells were obtained with a molecular weight ranging from 25 to > 250 kDa. RNAlater storage generated a fewer number and lesser quantity of low molecular weight proteins while yielded a similar or high quantity of high molecular weight protein fractions. The principal component analysis showed that Triton X-100 is inferior as compared to SDS and RIPA with respect to their protein bands and quantity yielded. While RNAlater is effective in preserving PBMC for proteome analysis, our findings warrant caution in its use in proteomics experiments especially if the target is low molecular weight proteins.


Asunto(s)
Leucocitos Mononucleares/química , Proteoma/aislamiento & purificación , ARN/química , Conservación de Tejido/métodos , Animales , Bovinos , Mezclas Complejas/química , Electroforesis en Gel de Poliacrilamida , Microextracción en Fase Líquida/métodos , Peso Molecular , Octoxinol/química , Conservadores Farmacéuticos/química , Cultivo Primario de Células , Análisis de Componente Principal , Proteoma/química , Proteoma/clasificación , ARN/aislamiento & purificación , Dodecil Sulfato de Sodio/química
6.
J Clin Diagn Res ; 7(8): 1599-603, 2013 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-24086850

RESUMEN

BACKGROUND: Echocardiographic determination of Left Ventricle Mass (LVM) - an important marker of cardiovascular disease, has been given a lot of importance in clinical diagnosis and in planning of treatment. Clinically asymptomatic compensated hypertensives show some pathological findings which are indicative of left ventricular dysfunction. METHODS: The study population of 106 males, after a detailed clinical examination, were evaluated by echocardiography and were classified as per the body mass index classification of WHO Western Pacific Region in 2000 for Asian population. Fasting blood samples were taken to estimate blood sugar and lipid profile. RESULTS: It was observed that subjects in normal range of body mass index <45 years (23.68%) and >45 years (16.1%), subjects of overweight <45 years (15.7%) and >45 years (10.29%) and obese I and II<45 years (60.52%) and >45 years (73.52%). The comparison between left ventricular mass which was indexed to height(2.7) in subjects who were <45 years and >45years was observed to be statistically significant (p<0.03). On comparing LVM/ht(2.7) of normal BMI group with that of those with higher BMIs, it was noted to be significantly different (p<0.009), which was suggestive of adverse effects of increasing BMI on LVM. It was also observed that persons with increased BMIs showed changes in left ventricular geometry - 30.13% had concentric hypertrophy, 17.80% had concentric remodeling, 8.21% had eccentric hypertrophy and that 38.35% had normal left ventricle geometry. CONCLUSION: The present study therefore, indicated that it was better to do an echocardiographic screening of asymptomatic subjects who had even a marginal increase in blood pressure and BMI, to diagnose potential cardiac dysfunction.

7.
Rev. bras. ciênc. mov ; 20(1): 41-46, jan.-mar. 2012.
Artículo en Portugués | LILACS | ID: lil-733983

RESUMEN

Verificar o efeito da prática de 10 sessões de caminhada sobre a qualidade de vida e auto-eficácia de mulheres com Síndrome da Fibromialgia (FM). Método: Participaram do estudo oito mulheres com diagnóstico clínico de FM, selecionadas de forma não-probabilística intencional. As avaliações foram realizadas antes e após 10 sessões da prática de caminhada. Os instrumentos utilizados foram o Questionário Sócio-demográfico e Clínico, o Questionário de Impacto da Fibromialgia e a Escalade Auto-eficácia para Dor Crônica. Após a verificação da normalidade através do teste Shapiro-Wilk, osdados foram tratados com estatística descritiva (freqüência, média e desvio padrão) e inferencial (teste t de Student e teste de Pearson). Resultados: A média de idade das participantes foi de 49 anos (+12,8), o impacto da síndrome da fibromialgia na qualidade de vida no pré-teste foi de 53,64 pontos e no pós-teste de 51,99 pontos (p=0,73) e a Auto-eficácia no pré-teste foi de 147,57 pontos e no pós-teste foi de 172,27 pontos (p=0,15). Em relação aos três domínios deste questionário, apenas o domínio da Auto-eficácia para lidar com outros sintomas apresentou diferença significativa entre o pré e pós-teste (p=0,02). Houve correlação negativa pós-teste (r=-0,72; p=0,042) entre o impacto da fibromialgia e a auto-eficácia. Conclusão: Apesar do curto período de intervenção realizado, a prática de caminhada melhorou o domínio da auto-eficácia para lidar com outros sintomas em mulheres com FM. Em relação à qualidade de vida, não ocorreram melhoras.


Objective: Verify the effect of practical of 10 walk sessions on the quality life and self efficacy of women with Fibromyalgia Syndrome (FM). Method: eight women with clinical diagnosis of FM had participated of the study. The evaluations were before and after 10 sessions of the practical of walking. The used instruments were the “Questionário Sócio-Demográfico e Clínico”, “The Fibromyalgia Impact Questionnaire”, and the “Chronic Pain Self-efficacy Scale”. After the verification of normality through the Shapiro-Wilk test, the data were dealt with descriptive statistics (frequency, average and deviation standard), test t and Pearson. Results: The average of age of the participants was of 49 years (±12,8), the impact of the fibromyalgia syndrome in the quality of life in the daily pay-test was of 53,64 points and in the after-test of 51,99 points (p=0,73) and the self-efficacy in the daily pay-test was of 147,57 points and in the after test was of 172,27 points (p=0,15). In respect to the three domains of this questionnaire, only the domain of the self-efficacy to deal with other symptoms presented significant difference between the daily pay and after-test (p=0,02). After test had negative correlation (r=-0,72; p=0,042) on the impact of the fibromyalgia and self-efficacy. Conclusion: Although the small number of accomplished sessions (10 sessions), the practical of walking improved the domain of the self-efficacy to deal with other symptoms in women with FM. In the analysis of the quality of life, had not occurred improvements.


Asunto(s)
Humanos , Femenino , Persona de Mediana Edad , Eficacia , Ejercicio Físico , Fibromialgia , Calidad de Vida , Caminata , Intervención en la Crisis (Psiquiatría) , Enfermedad , Dolor
8.
Theriogenology ; 75(6): 1005-15, 2011 Apr 01.
Artículo en Inglés | MEDLINE | ID: mdl-21196036

RESUMEN

Oviduct-specific glycoprotein (oviductin) plays an important role during fertilization and early embryonic development. The oviductin cDNA was successfully cloned and sequenced in goat, which possessed an open reading frame of 1620 nucleotides representing 539 amino acids. Predicted amino acid sequence showed very high identity with sheep (97%) followed by cow (94%), porcine (77%), hamster (69%), human (66%), rabbit (65%), mouse (64%) and baboon (62%). The bioinformatics analysis of the sequences revealed the presence of a signal sequence of 21 amino acids, one potential N-linked glycosylation site at position 402, 21 potential O-linked glycosylation sites and 36 potential phosphorylation sites. The native oviductin was purified from the oviductal tissue, which showed three distinct bands on SDS-PAGE and western blot (MW ~60-95 kDa). The predicted molecular weight of goat oviductin was 57.5 kDa, calculated from the amino acid sequences. The observed higher molecular weight has been attributed to the presence of large number of potential O-linked glycosylation sites. The lower concentration (10 µg/mL) of oviductin increased the cleavage rate, morula and blastocyst yield significantly (P < 0.05) as compared to higher concentration (100 µg/mL). Goat oviductin retarded the activity of pronase (0.1%) on zona solubility of oocytes significantly (P < 0.01).


Asunto(s)
Desarrollo Embrionario , Glicoproteínas/farmacología , Cabras/embriología , Secuencia de Aminoácidos , Animales , Secuencia de Bases , Western Blotting , Clonación Molecular , Biología Computacional , Secuencia Conservada , Técnicas de Cultivo de Embriones/veterinaria , Trompas Uterinas/metabolismo , Femenino , Fertilización In Vitro/veterinaria , Glicoproteínas/química , Glicoproteínas/aislamiento & purificación , Glicosilación , Masculino , Datos de Secuencia Molecular , Fosforilación , Análisis de Secuencia de ADN , Análisis de Secuencia de Proteína , Zona Pelúcida/química
9.
Reprod Domest Anim ; 46(4): 699-704, 2011 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-21134007

RESUMEN

The present investigation was carried out to find an efficient chemically assisted procedure for enucleation of goat oocytes related to handmade cloning (HMC) technique. After 22-h in vitro maturation, oocytes were incubated with 0.5 µg/ml demecolcine for 2 h. Cumulus cells were removed by pipetting and vortexing in 0.5 mg/ml hyaluronidase, and zona pellucida were digested with pronase. Oocytes with extrusion cones were subjected to oriented bisection. One-third of the cytoplasm with the extrusion cone was removed with a micro blade. The remaining cytoplasts were used as recipients in HMC. Goat foetal fibroblasts were used as nuclear donors. The overall efficiency measured as the number of cytoplasts obtained per total number of oocytes used was significantly (p < 0.05) higher in chemically assisted handmade enucleation (CAHE) than oriented handmade enucleation without demecolcine (OHE) (80.02 ± 1.292% vs. 72.9 ± 1.00%, respectively, mean ± SEM). The reconstructed and activated embryos were cultured in embryo development medium (EDM) for 7 days. Fusion, cleavage and blastocyst development rate were 71.63 ± 1.95%, 92.94 ± 0.91% and 23.78 ± 3.33% (mean ± SEM), respectively which did not differ significantly from those achieved with random handmade enucleation and OHE. In conclusion, chemically assisted enucleation is a highly efficient and reliable enucleation method for goat HMC which eliminates the need of expensive equipment (inverted fluorescence microscope) and potentially harmful chromatin staining and ultraviolet (UV) irradiation for cytoplast selection.


Asunto(s)
Clonación de Organismos/veterinaria , Demecolcina/farmacología , Cabras , Oocitos/citología , Oocitos/fisiología , Animales , Núcleo Celular/efectos de los fármacos , Clonación de Organismos/métodos , Técnicas de Transferencia Nuclear
10.
Indian J Exp Biol ; 47(8): 635-42, 2009 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-19775069

RESUMEN

With an aim to isolate, culture and characterize goat embryonic stem cell-like cells derived from in vitro fertilized goat blastocysts, slaughterhouse derived goat oocytes were in vitro matured in maturation medium in 5% CO2 air at 38.5 degrees C. Matured oocytes were fertilized in vitro with fresh capacitated spermatozoa. Total 636 (36.5%) cleaved embryos were obtained which were further co-cultured with goat oviductal epithelial cells (GOEC) for 7-10 days. GOEC culture system was better for formation of morula (150; 44.3%) and hatched blastocyst (13; 3.8%) than embryo development medium culture system, [morula (69; 23.1%) and hatched blastocyst (5; 1.6%)]. Out of total blastocysts (48) the primary colonies were formed in 23.3% (7/30) blastocysts, and 66.6% (12/18) of hatched blastocysts. The cells of the inner cell mass (ICM) derived primary colonies were small, aggregated and tightly packed in nature forming embryoid bodies on further subculture. The colonies were stained to see the expression of alkaline phosphatase and positive result was obtained. Goat embryonic stem cell like outgrowths were also characterized for Oct-4 expression and positive result was found. It could be concluded that ICM cells were isolated from in vitro fertilized goat blastocysts and cultured for embryonic stem cell-like cells and expression of alkaline phosphatase and Oct-4 in these cells were positive.


Asunto(s)
Blastocisto/citología , Técnicas de Cultivo de Embriones/métodos , Mórula/citología , Células Madre/citología , Fosfatasa Alcalina/metabolismo , Animales , Técnicas de Cultivo de Célula/métodos , Proliferación Celular , Células Cultivadas , Técnicas de Cocultivo , Embrión de Mamíferos/citología , Embrión de Mamíferos/metabolismo , Desarrollo Embrionario , Células Madre Embrionarias/citología , Células Madre Embrionarias/metabolismo , Femenino , Fertilización In Vitro , Regulación del Desarrollo de la Expresión Génica , Cabras , Masculino , Mórula/metabolismo , Factor 3 de Transcripción de Unión a Octámeros/genética , Oocitos/citología , Oviductos/citología , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa , Células Madre/metabolismo
11.
J Microsc ; 235(2): 119-23, 2009 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-19659905

RESUMEN

We describe a very simple but elegant approach to two-photon fluorescence signal enhancement by intensity modulation with immediate application in two-photon laser-scanning fluorescence microscopy. This method of enhancement shows potential application in any microscopic technique that result from non-linear photon absorption and plays a pivotal role in live cell imaging.


Asunto(s)
Células Endoteliales/citología , Microscopía Fluorescente/métodos , Animales , Bovinos , Núcleo Celular/ultraestructura , Coloración y Etiquetado/métodos , Tubulina (Proteína)/ultraestructura
12.
J Microsc ; 233(2): 320-5, 2009 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-19220698

RESUMEN

We describe a novel method of optical imaging by exploiting simple ideas borrowed from pulsed optics. We show that the use of ultrafast pulsed one-photon excitation in laser-scanning fluorescence microscopy dramatically brings together several advantages offered by two widely used present day microscopic techniques, confocal and multi-photon fluorescence microscopy. The method appears as a novel tool in the context of laser-scanning fluorescence microscopy by having a 'built-in' 3D spatial resolution.


Asunto(s)
Microscopía Confocal/métodos , Microscopía de Fluorescencia por Excitación Multifotónica/métodos , Animales , Bovinos , Células Endoteliales/ultraestructura , Colorantes Fluorescentes/metabolismo , Imagenología Tridimensional , Inmunoglobulina G/metabolismo , Ratones , Microtúbulos/ultraestructura , Fotones , Arteria Pulmonar/citología , Arteria Pulmonar/ultraestructura
13.
Indian J Physiol Pharmacol ; 51(3): 249-54, 2007.
Artículo en Inglés | MEDLINE | ID: mdl-18341221

RESUMEN

Lung function tests were performed on apparently healthy, non-smoking male volunteers aged 16-50 years normally staying in Varanasi city area. The volunteers were divided into five groups according to their age (16-19 yr, 20-25 yr, 26-30 yr, 31-35 yr, 40-50 yr). Anthropometric determinants (height and weight) and respiratory performance (vital capacity and peak expiratory flow rate) were recorded in the year 1982 and 2004. No significant (P>0.05) difference in height, weight and body mass index was detected between the age matched groups in the year 1982 and 2004. The Vital capacity (VC) was measured in 483 and 387 volunteers in the year 1982 and 2004 respectively; peak expiratory flow rate (PEFR) was measured in 200 and 388 subjects in the year 1982 and 2004 respectively. Both VC and PEFR were found to be reduced in the year 2004 as compared to those measured in 1982 from the similar population matched for age groups. They were significantly (P<0.001) lower (20-23% less for VC and 4-14% less for PEFR) in the 20-30 years age group. There was also significant (P<0.05) decrease in PEFR for the population of 16-19 years age group studied in 2004 compared to that of 1982. Significant (P<0.001) deterioration in VC per meter of height was observed in the population above 20 years of age. The mean values of VC (ml/m height) ranging from 2119.27 +/- 316.64 (20-25 years age group) to 1923.29 +/- 225.43 (40-50 years age group) in 1982 have dropped to 1896.54 +/- 289.50 and 1593.64 +/- 419.36 for the respective age groups in 2004. Similarly, mean value of PEFR (L/ min) was found to be reduced from 523.67 +/- 64.69 in 1982 to 471.44 +/- 85.25 in 2004 for the same age groups of 20-25 years. Similar reduction was also recorded for 16-19 yr group and 26-30 yr group of population. Air-pollution and sedentary lifestyles in the population of this city may be probable reasons for the decline in respiratory performance.


Asunto(s)
Ápice del Flujo Espiratorio/fisiología , Salud Urbana/estadística & datos numéricos , Capacidad Vital/fisiología , Adolescente , Adulto , Factores de Edad , Ciudades , Estudios Transversales , Humanos , Masculino , Persona de Mediana Edad , Insuficiencia Respiratoria/diagnóstico , Insuficiencia Respiratoria/fisiopatología , Espirometría/métodos , Factores de Tiempo
14.
Epidemiol Infect ; 133(3): 439-47, 2005 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-15962550

RESUMEN

Escherichia coli O157 outbreaks were identified in Minnesota in February 2003 involving seven persons and in Colorado in July 2003 involving 13 persons. Case isolates from the two states had matching pulsed-field gel electrophoresis (PFGE) patterns. Independent case-control studies linked infections in each outbreak with eating alfalfa sprouts that were traced to the same seed distributor. The Colorado sprouter reportedly complied with the Food and Drug Administration (FDA) sprout guidance, whereas the Minnesota sprouter did not. These investigations revealed that increased compliance with existing FDA guidance is needed and that additional research is needed to improve the alfalfa seed decontamination process. This reaffirms the FDA recommendation that raw alfalfa sprouts should be considered potentially contaminated and avoided by persons at high-risk such as the elderly, young children, and immunocompromised persons. PFGE played an essential role in linking these two temporally and geographically distinct E. coli O157 outbreaks.


Asunto(s)
Brotes de Enfermedades , Infecciones por Escherichia coli/epidemiología , Escherichia coli O157/aislamiento & purificación , Microbiología de Alimentos , Enfermedades Transmitidas por los Alimentos/epidemiología , Adulto , Estudios de Casos y Controles , Colorado/epidemiología , Infecciones por Escherichia coli/etiología , Infecciones por Escherichia coli/microbiología , Femenino , Enfermedades Transmitidas por los Alimentos/etiología , Enfermedades Transmitidas por los Alimentos/microbiología , Humanos , Masculino , Medicago sativa , Persona de Mediana Edad , Minnesota/epidemiología , Semillas
15.
Artículo en Inglés | MEDLINE | ID: mdl-15649813

RESUMEN

From the critical analyses of Raman and infrared spectra, different normal modes of vibration of diphenylmethane (DPM) have been identified. The near ultraviolet absorption spectra of the molecule are found to consist of two band systems, one around 220 nm and the other around 270 nm with respective f-values 5.23 x 10(-2) and 6.44 x 10(-3). The first system is broad and shows few diffuse structures, whereas the later one exhibits very well-resolved structure. They are respectively assigned as 1L(a) and 1L(b) bands. The Raman excitation profiles of several normal modes have been analyzed to get structural and other information of different excited electronic states.


Asunto(s)
Compuestos de Bencidrilo/química , Espectrofotometría/métodos , Ciclohexanos/química , Difusión , Electrones , Modelos Químicos , Modelos Estadísticos , Espectrometría Raman , Factores de Tiempo , Rayos Ultravioleta
16.
Ars pharm ; 44(3): 257-269, 2003. ilus, tab
Artículo en En | IBECS | ID: ibc-25371

RESUMEN

El comino (Cuminum cyminum) es un ingrediente habitual en la comida india. Ha sido usado desde hace mucho tiempo en la medicina tradicional para curar la diarrea, dispepsia y trastornos gástricos, así como agente antiséptico. Estudios realizados en nuestro laboratorio han mostrado que el comino tiene una potente actividad antimicrobiana sobre diversas especies de bacterias y hongos, tanto patógenas como no patógenas. Los estudios químicos realizados indican que la mayor parte de esta actividad antimicrobiana es debida al cuminaldehido [p-isopropil benzaldehido] presente en el fruto desecado de esta planta. Los estudios de concentración mínima inhibitoria (CMI) con el cuminaldehido aislado (comparado con el cuminaldehido patrón) indican que es efectivo sobre diferentes microorganismos, incluyendo cepas de bacterias, levaduras y hongos (AU)


Asunto(s)
Extractos Vegetales/farmacología , Bacterias , Hongos , Especias , Antibacterianos/farmacología , Apiaceae/química , Apiaceae/clasificación
17.
Am J Public Health ; 91(10): 1686-93, 2001 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-11574336

RESUMEN

OBJECTIVES: This study reports on Eat for Life, a multicomponent intervention to increase fruit and vegetable consumption among African Americans that was delivered through Black churches. METHODS: Fourteen churches were randomly assigned to 3 treatment conditions: (1) comparison, (2) self-help intervention with 1 telephone cue call, and (3) self-help with 1 cue call and 3 counseling calls. The telephone counseling in group 3 was based on motivational interviewing. The primary outcome, assessed at baseline and 1-year follow-up, was fruit and vegetable intake as assessed by 3 food frequency questionnaires. RESULTS: Change in fruit and vegetable intake was significantly greater in the motivational interviewing group than in the comparison and self-help groups. The net difference between the motivational interviewing and comparison groups was 1.38, 1.03, and 1.21 servings of fruits and vegetables per day for the 2-item, 7-item, and 36-item food frequency questionnaires, respectively. The net difference between the motivational interviewing and self-help groups was 1.14, 1.10, and 0.97 servings for the 2-item, 7-item, and 36-item food frequency questionnaires, respectively. CONCLUSIONS: Motivational interviewing appears to be a promising strategy for modifying dietary behavior, and Black churches are an excellent setting to implement and evaluate health promotion programs.


Asunto(s)
Negro o Afroamericano/psicología , Dieta/psicología , Frutas , Entrevista Psicológica , Motivación , Religión y Psicología , Verduras , Consejo , Femenino , Frutas/uso terapéutico , Humanos , Masculino , Evaluación de Resultado en la Atención de Salud , Comunicación Persuasiva , Fitoterapia , Verduras/uso terapéutico
18.
Spectrochim Acta A Mol Biomol Spectrosc ; 57(7): 1427-41, 2001 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-11446698

RESUMEN

Using steady state/time resolved spectroscopic and electrochemical techniques the spectroscopic and photophysical studies were made on a novel synthesized selenophene compound SeP in nonpolar methylcyclohexane (MCH), polar aprotic acetonitrile (ACN) and polar protic ethanol (EtOH) solvents at the ambient temperature as well as at 77 K. Both from the studies on unimolecular and bimolecular photoprocesses this selenophene compound was found to possess several electronic levels, 1Bb, 1La, 1Lb (all are of pi pi* nature and 1Lb is hidden within 1La band envelop like the characteristics of most of the acenes) and 1(nO pi*) state arising due to carbonyl oxygen atom. In polar ACN environment this nO pi* state disappears because it moves within the envelop of intense 1La band due to large destabilization. Large overlapping of different band systems within the 1La band of SeP was confirmed from the observed depolarization effect. The lack of phosphorescence of SeP both in MCH and EtOH rigid glassy matrix at 77 K has been inferred due to large vibronic interactions between closely lying triplets of the corresponding 1nO pi* and 1Lb states. From the bimolecular investigations, it reveals that SeP acts as a good electron donor in presence of the well known electron acceptor 9 cyanoanthracene (9CNA). Transient absorption spectra measured by laser flash photolysis technique demonstrate the formation of ion-pair when the acceptor is excited. From the analysis of the fluorescence quenching data it seemingly indicates that the major contribution in the diminution of the fluorescence intensity of the acceptor 9CNA in presence of SeP is not only due to the photoinduced electron transfer (ET) but also originates from static type (instantaneous) quenching processes along with external heavy atom effect. The possibility of occurrence of photoinduced ET reaction in Marcus inverted region is hinted.


Asunto(s)
Benzopiranos/química , Compuestos de Organoselenio/química , Fotoquímica/métodos , Acetonitrilos/química , Electroquímica , Etanol/química , Luminiscencia , Solventes/química , Espectrometría de Fluorescencia , Temperatura
19.
Ars pharm ; 42(3/4): 209-220, jul. 2001. tab, graf
Artículo en En | IBECS | ID: ibc-23472

RESUMEN

Entre las diferentes especies de Illicium, Illicium verum Hook.f., conocido vulgarmente como anís estrellado, posee potentes propiedades antimicrobianas. Los estudios químicos realizados indican que la mayor parte de esta actividad antimicrobiana se debe al anetol [1-metoxi-4-(1-propenil)-benceno] presente en el fruto desecado de esta planta. Ensayos de concentración mínima inhibitoria (CMI) con el anetol aislado, en comparación con un patrón de anetol, indicaron que es efectivo sobre diferentes microorganismos, entre los que se encuentran cepas de bacterias, levaduras y hongos (AU)


Asunto(s)
Humanos , Anetol Tritiona/farmacología , Apiaceae/química , Pruebas de Sensibilidad Microbiana , Antibacterianos/farmacología
20.
Spectrochim Acta A Mol Biomol Spectrosc ; 57(3): 545-9, 2001 Mar 01.
Artículo en Inglés | MEDLINE | ID: mdl-11300566

RESUMEN

Computational work has been done for a bichromophore (4MBA) comprising a donor 4-methoxy-benzo[b]thiophene (4MBT) and an acceptor molecule p-chloro-acetophenone (pclA) linked together by a HC=CH bond which shows large hyperpolarizability. The charge transfer in this bichromophoric system is computed by semiemperical theoretical calculation. Ground state and excited state dipole moment difference of the bichromophore 4MBA indicates a large electron transfer probability.


Asunto(s)
Espectrofotometría , Tiofenos/química , omegacloroacetofenona/química , Fenómenos Químicos , Química Física , Electrones , Modelos Químicos , Estructura Molecular , Fármacos Fotosensibilizantes/química
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA