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تعداد نتایج: 369829 فیلتر نتایج به سال:
گلیکوزیدها شکلی از متابولیت های ثانویه هستند که دارای تنوع ساختاری وسیعی هستند و در مواردی، در متابولیسم اولیه گیاهان نیز نقش دارند. گلیکوزیدهای استویول که تنها در گیاه استویا تولید می شود، به عنوان شیرین کننده طبیعی در صنایع غذایی و دارویی اهمیت ویژه ای دارند. سنتز استویول از مسیر ترپنوئیدی کلروپلاستی آغاز شده و با تولید آن از کائورنوئیک اسید توسط کائورنوئیک اسید 13-هیدروکسیلاز به سنتز گلیکوزی...
Influence of Resistance Training on Blood Pressure in Patients with Metabolic Syndrome and Menopause
This study investigated the chronic and acute influence of resistance exercise on blood pressure in women with metabolic syndrome before and after climacteric. Twenty sedentary women, nine non-menopausal (RNM) and 11 menopausal (RM), performed training for 12 weeks. Meanwhile, 23 controls, 11 not menopausal (CNM) and 12 menopausal (CM), remained sedentary. Blood pressure was measured before and...
Three new compounds, apetalumosides C₁ (1), D (2), and 1-thio--d-glucopyranosyl(1→1)-1-thio-α-d-glucopyranoside (3), together with twenty-two known ones (4-25) were obtained from the seeds of Lepidium apetalum Willd. Among the known isolates, 5-8, 10-13, 16-20, and 25 were obtained from the genus for the first time; 4, 14, 15, and 21-24 were isolated from the species for the first time. Meanwhi...
Chemical constituents investigation on the seeds of Machilus yunnanensis led to two new phenolic compounds 8-O-acetyl-phenylethanoid-4-O-β-D-glucopyranoside (1) and (E)-2,3-bis(4-hydroxyphenyl)acrylaldehyde (2), together with 16 known compounds. Their structures were elucidated on the basis of spectroscopic data analysis (IR, MS, 1D, and 2D NMR). Meanwhile, compounds 1-3, 6-13, 17, and 18 were ...
An extremely sensitive fluorescence sensor has been developed for selectively detection of mercury ions based on metallophilic Hg(2+)-Au(+) interactions, which results in an effective release of pre-adsorbed rhodamine 6G (R6G) molecules from the nanoporous gold substrate, associated with a significant decrease of fluorescence intensity. The optical sensor has a detection sensitivity down to 0.6...
Hoping to sharply cut HIV/AIDS transmission rates in the U.S., the Centers for Disease Control and Prevention (CDC) took the unusual step of recommending that doctors ask all patients from ages 13 to 64 whether they want to be tested for the virus. One in four Americans living with HIV don't know they are infected; for them, early diagnosis could mean early treatment and longer lives. Antiretr...
A novel liquid dye 2-((2E,5E)-2,5-bis(4-(methyl(2,5, 8,11-tetraoxatridecan-13-yl)amino)benzylidene)cyclopentylidene) malononitrile (TO-BDCM) was synthesized by incorporating two oligo(ethenyl glycol) groups into the backbone of a prototype malononitrile derivative (BDCM) for the purpose of increasing its solubility in organic solvents. The nonlinear absorption properties of this liquid dye on 1...
1.امتیاز دهی به لاشه های مبتلا به انتریت نکروتیک: موارد درگیر بر اساس علایم کالبدگشایی موجود در روده بویژه ژژنوم شناسایی شده و با توجه به شدت جراحات امتیاز دهی میشود 2-جمع آوری تاریخچه کامل گله،توسط پرسشنامه. 3-جداسازی،کشت و تایپینگ: 1-جداسازی باکتری کلستریدیوم پرفرنجنس ازروده مرغ های تلف شده و یا درگیر با فرم حاد بیماری آنتریت نکروتیک که در این طرح شامل ده نمونه در طول یک سال میشود ....
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