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A green technique that emerged as a promise in the degradation of numerous organic contaminants is photocatalysis. The aim of this study concerns photocatalytic degradation of organic using titanium dioxide nano particles (TiO2 NPs) which syntheses from ilmenite by different leaching methods using different ingredients such as HCl, HNO3 and Aqua Regia. The affecting factors such as rate of addition, reaction time, ilmenite grain size, acid to ilmenite ratio and reaction temperature were conducted. Comprehensive physicochemical characterization of Ilmenite and TiO2 NPs were conducted using different analytical techniques such as XRD, XRF, SEM, TEM and FTIR. Photocatalytic degradation of organics is confirmed by studies of affecting factors on the effectiveness of TiO2 NPs such as dose, agitation forces, light intensity, initial concentration, pH, time, and temperature. The removal percentages of TSS, COD, BOD and TN of organics were explored. From the results the maximum removal percentage of TSS were 97.3 and 96.9% before and after secondary treatment conducted using ferric chloride (FC). The maximum removal percentage of TKN, BOD, and COD before secondary treatment were conducted using mixture of TiO2 NPs, FC, and chitosan, which reached 44.2, 44 and 46.3%, respectively. The maximum removal percentage of TKN, BOD, and COD after secondary treatment were conducted using mixture of TiO2 NPs, FC, and chitosan, which reached 94.9, 99.7 and 99.6%, respectively. Overall, the results derived from this investigation suggest that the TiO2 NPs/UV holds significant advanced treatment of sewage water, making it a viable choice for water reuse applications.
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Diabetes is a chronic illness that can become debilitating owing to its microvascular and macrovascular complications. Its prevalence is increasing and so is its cost. Diabetes, particularly type 2, appears to have a very close relationship with obesity. While lifestyle modifications, exercises, and current therapeutics have substantially improved clinical outcomes, the need for new therapeutics and regimens continue to exist. Several new medications and regimens for diabetes, obesity, and diabesity are showing promising results in advanced clinical trials. For type 1 diabetes mellitus (T1DM), they include teplizumab, ustekinumab, jakinibs, and cell therapies, whereas for type 2 diabetes mellitus (T2DM), they include once-weakly insulin, tirzepatide, high oral dose of semaglutide, orforglipron, retatrutide, CagriSema, and survodutide. Given their structural and mechanistic diversity as well as their substantial efficacy and safety profiles, these medications and regimens are paradigm shifting and promise a brighter future. They will likely enable better disease prevention and management. This review will provide details about each of the above strategies to keep the scientific community up to date about progress in the fields of diabetes and obesity.
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Diabetes Mellitus Tipo 2 , Hipoglucemiantes , Obesidad , Humanos , Obesidad/tratamiento farmacológico , Hipoglucemiantes/uso terapéutico , Diabetes Mellitus Tipo 2/tratamiento farmacológico , Diabetes Mellitus Tipo 1/tratamiento farmacológico , Fármacos Antiobesidad/uso terapéuticoRESUMEN
Background: Idiopathic achalasia is a common and well-recognized primary esophageal motility disorder with unknown etiology and is characterized by the abnormality of esophageal body peristalsis associated with an impaired relaxation of the lower esophageal sphincter (LES). The aim of this study is to explore the correlation between Helicobacter pylori and idiopathic achalasia. Methods: This study was conducted on 700 patients, with dysphagia, regurgitation, and non-cardiac chest pain (NCCP), who met our inclusion criteria. The mean ± SD age was 39.8 ± 11 (13-80 years), and 60% (420) of the participants were female. Of the participants, 108 had idiopathic achalasia and 105 were normal participants who were placed in the case and control groups, respectively. They were enrolled in the study based on high-resolution manometry. H. pylori was confirmed by a histological study. In the biopsy, specimens were taken by esophagogastroduodenoscopy. Results: Our results revealed that 71.3% and 45% of the participants were H. Pylori positive in the case and control groups, respectively. The odds ratio (OR) was 3.3 (95% CI: 1.80-5.99, P < 0.05), indicating a statistically significant association between H. Pylori infection and the group classification. The dominant presenting symptoms in achalasia were dysphagia (97.2%) and NCCP (80.5%), but regurgitation (65.7%) was a dominant symptom in the normal participants. Conclusions and Inferences: Diverse autoimmune and apoptotic phenomena induced by H. Pylori influence the pathogenesis of idiopathic achalasia, suggesting an underlying link between H. Pylori infection and idiopathic achalasia. This correlation should be confirmed by other clinical and experimental studies.
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BACKGROUND: Although delayed cord clamping (DCC) is a recent WHO recommendation, early cord clamping (ECC) is still a routine practice in many countries. Limited researches studied the effect of delayed cord clamping on oxidative stress in term neonates; In this study we aim to assess the influence of cord clamping either early or late on oxidative stress in term neonates and to evaluate the association of oxidative stress and cord blood lipids. METHODS: One-hundred mothers and their term neonates were included in the present study. Umbilical cord blood samples were collected from the umbilical vein and umbilical artery immediately following labor. RESULTS: Total cholesterol, total triglycerides and phospholipids levels were significantly higher in the ECC group than the DCC group (p < 0.001 in all). Plasma total antioxidant status was higher in the DCC group than the ECC group (p < 0.001). While, plasma hydroperoxides were lower in the DCC group than the ECC group (p < 0.001). Levels of erythrocytes catalase cytosol, superoxide dismutase and glutathione peroxidase were significantly higher in the DCC group than the ECC group (p < 0.001). CONCLUSION: DCC was associated with a decrease in cord blood lipids and an augmented antioxidant activity. This suggests the protective effect of DCC on the future health of the term neonates and supports the application of DCC in active management of 3rd stage of labor in term neonates.
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Sangre Fetal/metabolismo , Estrés Oxidativo , Nacimiento a Término/sangre , Cordón Umbilical , Adulto , Catalasa/sangre , HDL-Colesterol/sangre , LDL-Colesterol/sangre , Constricción , Estudios Transversales , Femenino , Glutatión Peroxidasa/sangre , Humanos , Recién Nacido , Masculino , Fosfolípidos/sangre , Superóxido Dismutasa/sangre , Factores de Tiempo , Triglicéridos/sangreRESUMEN
OBJECTIVE: To evaluate vitamin D levels in Saudi newborns utilizing umbilical cord samples, and to benchmark the results with international figures. METHODS: This cross-sectional study was carried out at King Khalid University Hospital, Riyadh, Saudi Arabia between November 2013 and March 2013. Vitamin D levels were assessed in the umbilical cord of healthy term neonates born above 2.5 kg from healthy pregnant mothers. Gestational age (GA), birth weight, gender, levels of sun exposure, and consumption of vitamin D rich food data were collected. Our primary outcome was the percentage of newborns with vitamin D deficiency (vitamin D level below 25 nmol/l). Association of vitamin D deficiency with sun exposure and consumption of vitamin D rich food was tested using a Chi-squared test. RESULTS: Umbilical samples of 200 newborns were obtained. The average birth weight was 3.2 kg. Deficient vitamin D levels were detected in 59% of the sample. Almost 90% of included newborns had vitamin D levels below 50 nmol/l. We found no association of vitamin D deficiency status to level of sun exposure or to consumption of vitamin D rich food. CONCLUSION: Vitamin D deficiency is very common in Saudi newborns at hospital, and is consistent with regional data. Efforts to assess and treat vitamin D deficiency during pregnancy and provide adequate supplementation to newborns are necessary to rectify such a public health concern.
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Centros de Atención Terciaria , Deficiencia de Vitamina D/epidemiología , Estudios Transversales , Humanos , Recién Nacido , Arabia Saudita/epidemiologíaRESUMEN
By means of liquid chromatography-electrospray ionization (LC-ESI) mass spectrometry two glucosinolates, glucoiberin and 3-hydroxy,4(α-L-rhamnopyranosyloxy) benzyl glucosinolate, were identified in the aqueous extract of Brassica oleraceae L var. italica. Further, two compounds were isolated after enzymatic hydrolysis of the aqueous extract by myrosinase, one of them was identified as 4-vinyl-3-pyrazolidinone. The second compound (sulphoraphane) 1-isothiocyanate-4-methyl-sulphinyl butane, converted to the most stable form of thiourea (sulphoraphane thiourea). The crude extract (80% alcohol extract) of broccoli florets was examined for cytotoxic activity against different human cancer cell lines, it showed good inhibition of colon cancer (IC(50) 3.88 µg/mL). On the other hand each of the successive extracts (petroleum ether, chloroform, ethyl acetate and ethanol) showed no significant cytotoxic activity. When myrosinase hydrolysate was tested for cytotoxic activity on the colon cancer cell line it showed very high activity - 95% lethality up to 0.78 µg/mL.
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Antineoplásicos/farmacología , Brassica/química , Glucosinolatos/química , Isotiocianatos/farmacología , Extractos Vegetales/farmacología , Antineoplásicos/química , Antineoplásicos/aislamiento & purificación , Línea Celular Tumoral , Supervivencia Celular/efectos de los fármacos , Cromatografía Liquida , Neoplasias del Colon/tratamiento farmacológico , Flores/química , Glucosinolatos/aislamiento & purificación , Glicósido Hidrolasas/metabolismo , Humanos , Hidrólisis , Concentración 50 Inhibidora , Isotiocianatos/química , Isotiocianatos/aislamiento & purificación , Extractos Vegetales/química , Extractos Vegetales/aislamiento & purificación , Pirazolonas/química , Pirazolonas/aislamiento & purificación , Espectrometría de Masa por Ionización de Electrospray , Sulfóxidos , Tiourea/química , Tiourea/aislamiento & purificaciónRESUMEN
The objectives of the present study are to evaluate guar gum in combination with hydroxyl propyl methylcellulose (HPMC) as compression coat for colonic delivery of prednisolone as well as improving the mechanical properties of the compressed coated tablets. The core tablets containing 5 mg prednisolone were compression coated with 125 mg of coating materials consisted of guar gum alone or mixtures of guar gum in combination with different ratios of HPMC. The compressed coated tablets were evaluated for their mechanical properties, in vitro drug release and in vivo performance in human volunteers. The compressed coated tablets with coats containing HPMC exhibited acceptable mechanical properties. In vitro drug release studies in pH 7.4 phosphate-buffered saline medium containing 2% (w/v) rat caecal content have shown that increase in concentration of HPMC in the prepared coats from 10% to 20% resulted in an increase in the release rate. However, further increase in HPMC concentration to constitute 30% caused a reduction in the release rate. Based on the drug release results, tablets coated with coat consisted of 80% guar gum and 20% HPMC were selected for in vivo evaluation. In vivo gamma scintigraphic study on human volunteers using technetium-99m-diethylenetriamine pentaacetic acid as a tracer was performed. The results showed that tablets remained intact in stomach and small intestine, however partial and complete release of the tracer occurred in the colon. In conclusion, guar gum in combination with HPMC would be successfully used as a carrier for drug delivery to the colon.
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The objective of this study was to determine the antimicrobial effect of a combination of potassium lactate and sodium diacetate (0, 1.8, 3, and 4.5%; PURASAL P Opti. Form 4, 60% solution) on the survival and growth of Listeria monocytogenes Scott A in pH-adjusted broth (5.5, 6.0, 6.5, and 7.0) stored at 4, 10, 17, 24, 30, and 37 degrees C. Appropriate dilutions of broth were enumerated by spiral plating on tryptose agar and counted with an automated colony counter. Growth data were iteratively fit, using nonlinear regression analysis to a three-phase linear model, using GraphPad PRISM. At pH 5.5, the combination of lactate-diacetate fully inhibited (P < 0.001) the growth of L. monocytogenes at all four levels and six temperatures. At pH 6.0, addition of 1.8% lactate-diacetate reduced (P < 0.001) the specific growth rate of L. monocytogenes and increased lag time; however, 3 and 4.5% completely inhibited the growth at the six temperatures studied. Efficacy of the lactate-diacetate mixture was decreased as pH increased and incubation temperature increased. Thus, at pH 6.5, at least 3% was required to retard (P < 0.001) the growth of L. monocytogenes in broth. There was a limited effect of the lactate-diacetate level on the specific growth rate of the pathogen at pH 7.0. However, 1.8 and 3% significantly lengthened the lag time at 4 and 10 degrees C. These results suggest that 1.8% of lactate-diacetate mixture can be used as a substantial hurdle to the growth of L. monocytogenes when refrigerated temperatures are maintained for products with pH less than 6.5.
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Manipulación de Alimentos/métodos , Conservación de Alimentos/métodos , Lactatos/farmacología , Listeria monocytogenes/crecimiento & desarrollo , Acetato de Sodio/farmacología , Recuento de Colonia Microbiana , Medios de Cultivo/química , Relación Dosis-Respuesta a Droga , Microbiología de Alimentos , Conservantes de Alimentos/farmacología , Concentración de Iones de Hidrógeno , Listeria monocytogenes/efectos de los fármacos , Temperatura , Factores de TiempoRESUMEN
Four apigenin glycosides were isolated from the ethyl acetate extract of the leaves of Mayodendron igneum Fam.Bignoniaceae. They were identified as apigenin 7-O-glucoside; 6-methoxy apigenin-7-O-glucoside; 6-methoxy apigenin-7-O-rhamnoglucoside and 6-hydroxy apigenin-7-O-rhamnoglucoside. In addition an isoflavone glycoside was isolated, and identified as genistin 5,4'-methyl ether. Ethanol (80%) extract of Mayodendron igneum leaves exhibited significant anti-inflammatory and analgesic activities. LD(50) determination of the extract indicated the safety of the leaves of the plant.
RESUMEN
Ethyl acetate and ethanol extracts of unflowering aerial part of Macfadyena unguis-cati L. (Fam. Bignoniaceae) were found to be rich in phenolic compounds. From ethyl acetate extract, six flavonoids were identified, 8, methoxy, acacetin, 7-O glucoside; 6, methoxy apigenin 7-O glucoside; 4'-O methyl scutellarin, 6-O apiosyl galactoside; acacetin, 7-O glucosyl, 8-C rhamnosyl, 3-O-alpha arabinofuranoside; 4'-methyl, 6- methoxy kaempferol, 7-O, 8-C diglucoside and vicenin II were isolated, while 6, methoxy, acacetin 7-O glucoside; and quercitrin were isolated from ethanol extract. These compounds were characterized and identified by their physicochemical and spectral data. The crude ethanol extract exhibited significant anti-inflammatory activity (80.47%) and moderate cytotoxic activity against lung cell line.
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In this paper, the authors offer a classification of benign fatty tumours of the upper limb. There are three histologically distinct types of fat cells: immature fat cells which give rise to lipoblastomas, mature brown fat cells which give rise to hibernomas and mature white fat cells which give rise to lipomas. Lipomas are the most common and they are sub-classified according to the anatomic site of fat cells into dermal, subcutaneous and sub-fascial lipomas; or tumours directly related to muscle, bone, synovium or nerve. Finally, the authors review 67 patients with benign fatty tumours of the upper limb and provide clinical examples of these tumours including their characteristic histological and radiological features.
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Lipoma/clasificación , Lipoma/diagnóstico , Extremidad Superior/patología , Adolescente , Adulto , Anciano , Niño , Preescolar , Femenino , Humanos , Lipoma/cirugía , Lipomatosis/clasificación , Lipomatosis/diagnóstico , Lipomatosis/cirugía , Imagen por Resonancia Magnética , Masculino , Persona de Mediana Edad , Neoplasias de los Músculos/clasificación , Neoplasias de los Músculos/diagnóstico , Neoplasias de los Músculos/cirugía , Síndromes de Compresión Nerviosa/etiología , Dolor/etiología , Neoplasias del Sistema Nervioso Periférico/clasificación , Neoplasias del Sistema Nervioso Periférico/diagnóstico , Neoplasias del Sistema Nervioso Periférico/cirugía , Neoplasias Cutáneas/clasificación , Neoplasias Cutáneas/diagnóstico , Neoplasias Cutáneas/cirugía , Neoplasias de los Tejidos Blandos/clasificación , Neoplasias de los Tejidos Blandos/diagnóstico , Neoplasias de los Tejidos Blandos/cirugía , Tendones/patología , Tendones/cirugía , Extremidad Superior/cirugíaRESUMEN
A unique case of total foot-to-hand transfer, including the calcaneus, in an 8 month-old infant with monodactyly is described. Several technical and psychological aspects of the case are also discussed.
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Deformidades Congénitas del Pie/cirugía , Pie/trasplante , Deformidades Congénitas de la Mano/cirugía , Amputación Quirúrgica , Femenino , Antebrazo/irrigación sanguínea , Humanos , Lactante , Pierna/cirugía , Arteria Cubital/anomalíasRESUMEN
This paper describes a unique fracture pattern of the proximal phalanx in children that has not been specifically studied in the literature. Volarly, the fracture line passes through the phalangeal neck and then the fracture line passes dorsally to include a dorsal flange of the metaphysis. Fractures were classified into three types: type I fractures were undisplaced with no finger deformity; type II fractures were mildly displaced in the antero-posterior plane without lateral angulation or scissoring; while type III fractures were severely displaced or had associated lateral angulation or scissoring deformity. Over a 6-year-period, nine cases were seen by the authors. The mechanism of injury was by entrapping the digit in a closing door in all cases. The mean age of patients was 5 years. Types I and II fractures were seen in five children and all were treated by splinting with an excellent outcome. Two children with type III fractures were treated with closed reduction and either splinting (one case) or k-wire (one case), and both had a poor initial outcome. The remaining two children with type III fractures were treated with open reduction and internal fixation with an excellent outcome. Differences between these fractures and the classic phalangeal neck fractures are discussed.
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Traumatismos de los Dedos/diagnóstico por imagen , Fracturas Óseas/diagnóstico por imagen , Niño , Preescolar , Femenino , Traumatismos de los Dedos/cirugía , Fijación de Fractura/métodos , Humanos , Puntaje de Gravedad del Traumatismo , Masculino , Radiografía , Estudios Retrospectivos , Resultado del TratamientoRESUMEN
A technique of correction of Stahl's ear is presented and is compared with other techniques reported in the literature.
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Cartílago/trasplante , Oído Externo/anomalías , Oído Externo/cirugía , Procedimientos de Cirugía Plástica/métodos , Niño , HumanosRESUMEN
Literature reports reveal that the issue of whether cyclodextrins may act as skin permeation enhancers has not been resolved. Accordingly, in vitro skin transport studies were conducted to address this question. Corticosterone (3H-CS and/or non-radiolabeled CS) was chosen as the model permeant for transport experiments with hairless mouse skin (HMS) and with a synthetic cellulose membrane of 500 molecular weight cut off (MWCO), the latter to help establish baseline behavior. Hydroxypropyl-beta-cyclodextrin (HPbetaCD) was selected as the representative cyclodextrin. The CS/HPbetaCD complexation constant was determined both from solubility data (saturation conditions) in phosphate buffered saline (PBS), pH 7.4 and with data obtained from PBS/silicone polymer partitioning experiments, the latter experiments permitting the determination of the complexation constant at low CS concentrations. These results were used in the calculations of the free CS concentrations in the donor chamber of the transport experiments. The CS transport experiments were conducted at CS solubility saturation and under supersaturation (resulting from autoclaving at 121 degrees C) conditions as well at very low (tracer level) concentrations. The effect of polyvinylpyrrolidone as a solution additive was also evaluated. The following were the key outcomes of this study. Contrary to literature reports, there was no evidence that HPbetaCD is an enhancer for CS transport through HMS. The CS permeability coefficient values obtained with HMS in all of the experiments were found to be the same within experimental error when calculated on the basis of the free CS concentration as the driving force for permeation. The constancy of the permeability coefficient in the presence and absence of HPbetaCD is interpreted to mean that, in these experiments, HPbetaCD did not alter the barrier properties of HMS stratum corneum to any significant extent nor did it enhance CS transport in any other manner such as by a carrier mechanism involving the aqueous boundary layer or by a carrier mechanism within the stratum corneum.
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Adyuvantes Farmacéuticos/farmacología , Celulosa/análogos & derivados , Corticosterona/farmacocinética , Ciclodextrinas/farmacología , beta-Ciclodextrinas , 2-Hidroxipropil-beta-Ciclodextrina , Adyuvantes Farmacéuticos/química , Administración Cutánea , Animales , Transporte Biológico , Celulosa/química , Corticosterona/química , Ciclodextrinas/química , Estabilidad de Medicamentos , Femenino , Calor , Técnicas In Vitro , Membranas Artificiales , Ratones , Ratones Pelados , Permeabilidad , Povidona/química , Povidona/farmacología , Absorción Cutánea/efectos de los fármacos , SolubilidadRESUMEN
Two tuft fractures of the distal phalanx had a unique fracture pattern with significant displacement of the proximal fracture fragment into the pulp of the finger. Both fractures were irreducible by closed means, probably due to entrapment of bony spikes within the fibrous septa of the pulp or overlapping of the proximal and distal fracture fragments.
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Traumatismos de los Dedos/cirugía , Fijación Interna de Fracturas/métodos , Fracturas Óseas/cirugía , Adulto , Hilos Ortopédicos , Niño , Femenino , Traumatismos de los Dedos/diagnóstico por imagen , Humanos , Masculino , RadiografíaRESUMEN
High tensions of carbon monoxide (CO), relative to oxygen, were used as a tool to investigate the mechanism of chemotransduction. In an in vitro whole organ, rat carotid body preparation, CO increased sinus nerve chemoafferent discharge in the dark, an effect that was significantly reduced (by ca 70 %) by bright white light and by the removal of extracellular Ca(2+) from the superfusate or by the addition of either Ni(2+) (2 mM) or methoxyverapamil (100 microM). Addition of the P(2) purinoceptor antagonist pyridoxalphosphate-6-azophenyl-2',4'-disulphonic acid (50 microM) also significantly reduced the neural response to CO. In perforated patch, whole-cell recordings of isolated rat type I cells, CO induced a depolarisation of ca 11 mV and a decrease in the amplitude of an outward current around and above the resting membrane potential. Membrane conductance between -50 and -60 mV was significantly reduced by ca 40 % by CO. These effects were not photolabile and were present also when a 'blocking solution' containing TEA, 4-AP, Ni(2+) and zero extracellular Ca(2+) was used. In conventional whole-cell recordings, CO only decreased current amplitudes above +10 mV and was without effect around the resting membrane potential. These data demonstrate a direct effect of CO upon type I cell K(+) conductances and strongly suggest an effect upon a background, leak conductance that requires an intracellular mediator. The photolabile effect of CO only upon afferent neural discharge adds further evidence to a dual site of action of CO with a separate action at the afferent nerve terminal that, additionally, requires the permissive action of the neurotransmitter ATP.
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Monóxido de Carbono/farmacología , Cuerpo Carotídeo/efectos de los fármacos , Cuerpo Carotídeo/fisiología , Fosfato de Piridoxal/análogos & derivados , Animales , Calcio/metabolismo , Técnicas In Vitro , Luz , Potenciales de la Membrana/efectos de los fármacos , Potenciales de la Membrana/fisiología , Potenciales de la Membrana/efectos de la radiación , Técnicas de Placa-Clamp , Inhibidores de Agregación Plaquetaria/farmacología , Potasio/metabolismo , Antagonistas del Receptor Purinérgico P2 , Fosfato de Piridoxal/farmacología , Ratas , Receptores Purinérgicos P2/fisiología , Sistemas de Mensajero Secundario/fisiología , Estimulación QuímicaRESUMEN
OBJECTIVE: The Medpor implant (Porex Surgical, College Park, GA) is a porous polyethylene that has been used safely in areas in the head and neck. Medpor allows the in-growth of capillaries and soft tissue and reduces the risk of infection and extrusion. This study was undertaken to evaluate the use of the Medpor implant in laryngotracheal reconstruction and to compare epithelialization of the trachea following two different methods at various intervals. METHODS: Eight beagles were divided into two groups. The first group underwent laryngotracheoplasty using the Medpor implant only, whereas the second group had the Medpor implant lined with a strap muscle flap. One animal from each group was sacrificed at 5-, 7-, 9-, and 12-month intervals. The degree of stenosis, inflammation, and epithelialization were compared. RESULTS: The Medpor implant can safely be used to reconstruct the trachea in this animal model. There is less stenosis and better epithelialization when the Medpor implant is lined with a strap muscle flap. CONCLUSION: The Medpor implant can safely be used in laryngotracheal reconstruction in beagles.
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Materiales Biocompatibles , Laringoestenosis/cirugía , Polietilenos , Prótesis e Implantes , Estenosis Traqueal/cirugía , Animales , Perros , Mucosa Respiratoria/crecimiento & desarrolloRESUMEN
GC/MS analysis of the volatiles produced by the action of endogenous myrosinase in Cleome chrysantha Decne. herb, showed three major components, 1-isocyano-4-methyl benzene, gamma-muurolene and (cis) nerolidole (21.72%, 12.15% and 10.39%, respectively). 1-isocyano-4-methyl benzene is not produced from myrosinase treated seeds of Cleome chrysantha Decne., while muurolene and nerolidole were found at higher concentrations 16.1% and 13.67%, respectively. Some other isothiocyanates identified in the seeds and leaves, but in low percentages, were 2-methylbutyl isothiocyanate, 4-methylthiobutyl isothiocyanate and isothiocyanatomethyl benzene. Enzymatic hydrolysis of the ethanol extract of Cleome chrysantha Decne., produced two non-volatile isothiocyanates, 4, 6-dimethyltetrahydro-1,3-oxazine-2-thione and N-(-4-methyl-sulphinyl-3-butenyl) isothiocyanate which was established by aniline and methanolic ammonia to give the stable form of phenyl thiourea. They were identified by their spectroscopic data. These two isothiocyanates and the volatiles of the herb showed good antimicrobial activity against E. coli, Pseudomonas putida and Rhizobium meloloti (gram-negative bacteria) and moderate activity against Bacillus subtilis and Streptococcus lactis (gram-positive bacteria).
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Glicósido Hidrolasas/metabolismo , Isotiocianatos/análisis , Extractos Vegetales/farmacología , Plantas/química , Antibacterianos , Antiinfecciosos/farmacología , Bacterias/efectos de los fármacos , Isotiocianatos/farmacología , Pruebas de Sensibilidad Microbiana , Extractos Vegetales/química , Saccharomyces cerevisiae/efectos de los fármacosRESUMEN
The total herb of Diplotaxis harra Forsk. on treatment with myrosinase produces isopropyl isothiocyanate and 3- butenyl isothiocyanate in addition to (the non-volatile) 2-hydroxy-3-butenyl isothiocyanate which could be obtained as 5-vinyl-2-oxazolidinethione (goitrin) and methyl 4-isothiocyanatobutyrate (Erypestrin). On treating Erucaria microcarpa Boiss, herb with myrosinase, it produces isopropyl isothiocyanate, butyl isothiocyanate and benzyl isothiocyanate in addition to the non-volatile 8-methylsulphinyloctyl isothiocyanate (hirsutin). The plant extracts contain high percentages of arachidonic and palmitic acids, nonadecane, cholesterol, stigmasterol and B-sitosterol. The volatile constituents of D. harra and E. microcarpa showed higher activity against yeasts than Gram +ve, Gram -ve bacteria and fungi. The nonmethylated fatty acids of the two herbs showed higher activity against Gram +ve and Gram -ve bacteria than yeasts and fungi.