Humarain: A new dimeric gallic acid glycoside from Punica granatum L. bark     

Mudasir Ahmad Tantray  Seema Akbar  Reehana Khan  Khurshid Ahmad Tariq  Abdul Sami Shawl 《Fitoterapia》2009

A new dimeric gallic acid glycoside named Humarain (1) was isolated from stem bark of Punica granatum. The structure of the compound was determined by spectroscopic data including 1D and 2D NMR spectral analysis.  相似文献   

Improved high-performance liquid chromatography (HPLC) method for qualitative and quantitative analysis of allantoin in Zea mays     

Haghi G  Arshi R  Safaei A 《Journal of agricultural and food chemistry》2008,56(4):1205-1209

A high-performance liquid chromatography (HPLC) method for the qualitative and quantitative analysis of allantoin in silk and seed of Zea mays has been developed. Allantoin separation in crude extract was achieved using a C 18 column and phosphate buffer solution (pH 3.0) as a mobile phase at ambient temperature at a flow rate of 1.0 mL/min and detected at 210 nm. The results showed that the amount of allantoin in samples was between 14 and 271 mg/100 g of dry plant material. A comprehensive validation of the method including sensitivity, linearity, repeatability, and recovery was conducted. The calibration curve was linear over the range of 0.2-200 microg/mL with a correlation coefficient of r2>0.999. Limit of detection (LOD, S/N=3) and limit of quantification (LOQ) values of the allantoin were 0.05 and 0.2 microg/mL (1.0 and 4.0 ng) respectively. The relative standard deviation (RSD) value of the repeatability was reported within 1.2%. The average recovery of allantoin added to samples was 100.6% with RSD of 1.5%.  相似文献   

灌溉及株距间的交互作用对甘蔗产量、蔗糖含量的影响(英文)     

Md.AkbarHossain  吉永安俊  赵廷宁  A.H.M.DelwarHossain  Md.AbdulMatin 《中国林学(英文版)》1999,(2)

为研究孟加拉干旱区灌溉方式、株距及其交互作用对甘蔗分蘖数量、可榨甘蔗数量、甘蔗产量以及蔗糖含量的影响 ,在孟加拉第 11农业生态区的洪积平原上进行了为期 3年的栽培试验 .试验株距分别为 30 ,4 5,6 0和 75cm ,试验灌溉方式为天然降雨配合点灌和漫灌 .试验区按裂区试验法进行布置 ,灌溉方式则按小区布设 ,株距试验布置在主试验区 .试验结果表明 ,灌溉方式、栽植株距以及它们之间的交互作用对甘蔗产量、含糖量有显著影响 .就株距而言 ,4 5cm的株距可以获得最高的甘蔗产量(75 81t·hm- 2 ) .同样 ,在雨养、点灌及漫灌三种灌溉方式中 ,漫灌的甘蔗产量最高 (91 2 7t·hm- 2 ) .最好的栽培技术组合为 4 5cm株距配合漫灌 ,甘蔗分蘖数、可榨甘蔗数、甘蔗产量、产糖量以及投入产出比分别高达 2 0 3× 10 3株·hm- 2 ,115 53× 10 3株·hm- 2 ,10 1 6 4t·hm- 2 ,8 45t·hm- 2 和 5 52∶1  相似文献   

Continued presentation of cases of Schmallenberg virus in sheep in England     

Steinbach F  Dastjerdi A  Drew T  Cook A  Davies I 《The Veterinary record》2012,170(21):547

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Acylated flavonol glycosides from Epimedium elatum, a plant endemic to the Western Himalayas     

Tantry MA  Dar JA  Idris A  Akbar S  Shawl AS 《Fitoterapia》2012,83(4):665-670

Herba Epimedii is a well-known Botanical preparation used over long time in traditional Chinese medicine. The extracts and chemical constituents from Epimedium species are aphrodisiac as well as to treat many ailments. Chemical investigation of lonely species growing in Kashmir Himalaya Epimedium elatum was undertaken to evaluate its chemical profile. Two unusual substituted acylated flavonol glycosides named Elatoside A (1) and Elatoside B (2) have been isolated from the ethanolic extract of E. elatum along with 23 previously known ones (3-25). All isolates were evaluated for antimicrobial and PPAR-γ ligand binding activity, and some of them appeared to be modestly active.  相似文献   

Morphometrical study of polysialylated neural cell adhesion molecule positive cells in rat pups hippocampus following induction of seizure during pregnancy     

Rajabzadeh AA  Bideskan AR  Haghir H  Fazel AR 《Iranian Biomedical Journal》2011,15(4):157-163

Background:The polysialylated neural cell adhesion molecule (PSA-NCAM) is expressed in developing brain. Fetal brain damage is caused by different conditions such as seizure and hypoxia. The present study was designed to investigate the effect of maternal seizures on the number of PSA-NCAM positive cells in pup''s hippocampus. Methods: Female Wistar rats were divided into four groups: (a) kindled rats which received PTZ (40 mg/kg, i.p.) during pregnancy from embryonic day 14-19 (E14-E19) every 48 h, (b) kindled rats which did not receive PTZ during pregnancy, (c) non-kindle, pregnant rats which received PTZ injection (40 mg/kg, i.p.) during pregnancy from E14 to E19 every 48 h, and (d) non-kindle, pregnant rats which received injection with an equal volume of normal saline as sham controls. At postnatal day 14 (PD₁₄), rat pups were perfused, and their brain were fixed, embedded and coronal sections stained by immunohistochemistry method. The number of PSA-NCAM positive cells per unit area in the pup''s hippocampus was counted. Results: The number of PSA-NCAM positive cells in the CA1, CA3, and DG fields of pup''s hippocampus, which was obtained from mothers who experienced PTZ injection during pregnancy, was decreased approximately 2.6 (P = 0.001), 2 (P = 0.001), and 2.1 (P = 0.001) times compared with non-PTZ treated maternal groups, respectively. Conclusions: Our study showed that maternal seizures reduced the number of neurons and also PSA-NCAM positive cells per unit area in the offspring hippocampus that it may cause impairment in hippocampal functions.Key Words: Epilepsy, Polysialylated neural cell adhesion molecule (PSA-NCAM), Hippocampus, Seizures  相似文献   

Regulation of defense responses via heat shock transcription factors in Cucumis sativus L. against Botrytis cinerea     

Kharisma  Agung Dian  Arofatullah  Nur Akbar  Yamane  Kenji  Tanabata  Sayuri  Sato  Tatsuo 《Journal of General Plant Pathology》2022,88(1):17-28

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Response of sunflower and soybean to infection with Sclerotinia sclerotiorum with addition of organic amendments     

Asadabadi  Ramin Safaei  Hage-Ahmed  Karin  Steinkellner  Siegrid 《植物病害和植物保护杂志》2022,129(6):1367-1376

Journal of Plant Diseases and Protection - The addition of compost, green waste biochar, and wood biochar to a pathosystem consisting of Sclerotinia sclerotiorum (Lib.) de Bary and two susceptible...  相似文献   

Does the Relief of Glucose Toxicity Act As a Mediator in Proliferative Actions of Vanadium on Pancreatic Islet Beta Cells in Streptozocin Diabetic Rats?     

Leila Pirmoradi  Mohammad Taghi Mohammadi  Akbar Safaei  Fakhardin Mesbah  Gholam Abbas Dehghani 《Iranian Biomedical Journal》2014,18(3):173-180

Background: Data shows vanadium protects pancreatic beta cells (BC) from diabetic animals. Whether this effect is direct or through the relief of glucose toxicity is not clear. This study evaluated the potential effect of oral vanadyl sulfate (vanadium) on glycemic status and pancreatic BC of normal and diabetic rats. Methods: Rats were divided into five groups of normal and diabetic. Diabetes was induced with streptozocin (40 mg/kg, i.v.). Normal rats used water (CN) or vanadium (1 mg/ml VOSO₄, VTN). Diabetic rats used water (CD), water plus daily neutral protamine Hagedorn insulin injection (80 U/kg, ITD) or vanadium (VTD). Blood samples were taken for blood glucose (BG, mg/dL) and insulin (ng/dL) measurements. After two months, the pancreata of sacrificed rats were prepared for islet staining. Results: Pre-treated normal BG was 88 ± 2, and diabetic BG was 395 ± 9. The final BG in CD, VTD, and ITD was 509 ± 22, 138 ± 14, and 141 ± 14, respectively. Insulin in VTN (0.75 ± 0.01) and VTD (0.78 ± 0.01) was similar, higher than CD (0.51 ± 0.07) but lower than CN (2.51 ± 0.02). VTN islets compared to CN had larger size and denser central core insulin immunoreactivity with plentiful BC. CD and ITD islets were atrophied and had scattered insulin immunoreactivity spots and low BC mass. VTD islets were almost similar to CN. Conclusion: Besides insulin-like activity, vanadium protected pancreatic islet BC, and the relief of glucose toxicity happening with vanadium had a little role in this action. Key Words: Vanadium, Rats, Diabetes, Protection, Beta cells  相似文献   

Pelagia noctiluca (Scyphozoa) Crude Venom Injection Elicits Oxidative Stress and Inflammatory Response in Rats     

Giuseppe Bruschetta  Daniela Impellizzeri  Rossana Morabito  Angela Marino  Akbar Ahmad  Nunziacarla Spanò  Giuseppa La Spada  Salvatore Cuzzocrea  Emanuela Esposito 《Marine drugs》2014,12(4):2182-2204

Cnidarian toxins represent a rich source of biologically active compounds. Since they may act via oxidative stress events, the aim of the present study was to verify whether crude venom, extracted from the jellyfish Pelagia noctiluca, elicits inflammation and oxidative stress processes, known to be mediated by Reactive Oxygen Species (ROS) production, in rats. In a first set of experiments, the animals were injected with crude venom (at three different doses 6, 30 and 60 µg/kg, suspended in saline solution, i.v.) to test the mortality and possible blood pressure changes. In a second set of experiments, to confirm that Pelagia noctiluca crude venom enhances ROS formation and may contribute to the pathophysiology of inflammation, crude venom-injected animals (30 µg/kg) were also treated with tempol, a powerful antioxidant (100 mg/kg i.p., 30 and 60 min after crude venom). Administration of tempol after crude venom challenge, caused a significant reduction of each parameter related to inflammation. The potential effect of Pelagia noctiluca crude venom in the systemic inflammation process has been here demonstrated, adding novel information about its biological activity.  相似文献