Carbon partitioning in the leaves of Cucumis sativus L., a stachyose translocating plant, was influenced by the presence or absence of a single growing fruit on the plant. Fruit growth was very rapid with rates of fresh weight gain as high as 3.3 grams per hour. Fruit growth was highly competitive with vegetative growth as indicated by lower fresh weights of leaf blades, petioles, stem internod...

Cell expansion in plants requires cell wall biosynthesis and rearrangement. During periods of rapid elongation, such as during the growth of etiolated hypocotyls and primary root tips, cells respond dramatically to perturbation of either of these processes. There is growing evidence that this response is initiated by a cell wall integrity-sensing mechanism and dedicated signaling pathway rather...

The final steps of spermidine and spermine biosynthesis involve the addition of an aminopropyl group from S-methyladenosylhomocysteamine (decarboxylated S-adenosyl-L -methionine) to putrescine and spermidine respectively 91-33 _ The reactions, forming 5’-methylthioadenosie as a secondary product, are catalyzed by two distinct synthases [4-7]_ Thus far, studies concerning polyamine metabolism ha...

conclusions although lap had good performance in early diagnosis of gas, a combination of clinical findings, including tonsillar exudates, petechiae with results of rapid antigen test or culture is necessary for clinician judgment. throat culture is the gold standard test for detecting group a streptococcal infection, but rapid test is a good replacement for culture. objectives the aim of this ...

background and objectives: tuberculosis (tb) is a major problem in the world. treatment and control of tb needs detection of the mycobacterium tuberculosis (mt) in the proper samples. while smear doesn’t have enough sensitivity, culture and pcr are expensive, time consuming and unavailable in many centers. recent development of a rapid tb antigen detection test (prtbk) at pasteur institute of i...

In this paper, we focused on the green synthesis of titanium dioxide (TiO2) nanoparticles via an ecofriendly process using Citrus limon extract. Several analytical techniques were used to characterize prepared samples: X-ray diffraction (XRD), infrared spectroscopy, Raman Scanning Electron Microscopy (SEM) and photoelectrons spectroscopy (XPS). XRD diffractograms revealed anatase crystal struct...

In this study, we used khat (Catha edulis) leaf extract as a reducing and stabilizing agent for the biosynthesis of zinc oxide nanoparticles (ZnO NPs). The rapid color change solution to pale yellow UV-visible absorption peak at 322 nm confirmed initial formation ZnO NPs. FTIR spectrum analysis revealed contribution bioreduction Zn2+ ions stretching vibration 480 cm-1 also confirms XRD showed c...

Microbial biorefineries to produce chemicals from renewable feedstock provides attractive advantages, including mild reaction conditions and sustainable manufacturing. However, low-efficiency always result in an uncompetitive biological process compared the current petrochemical process. Thus, improving microbial capacity maximize product yield, productivity, titer has been recognized as a cent...

in the present study, a simple, fast and eco-friendly biosynthesis of silver nanoparticles (agnps) using   mentha langifolia leaf extract as the reducing agent was investigated. nanoparticles forming were indicated by the color changes in solution and were confirmed by uv-vis spectrum, ft-ir analysis and scanning electron microscopic (sem) micrograph. the average particle size of produced agnps...

Sensitive monitoring of the target products during biosynthesis process is crucial, and facile analytical approaches are urgently needed. Herein, phosphatidylserine (PS) was chosen as model target, a colorimetric aptasensor developed for rapid quantitation in samples. A chimeric aptamer constructed with two homogeneous original PS aptamers. Specific recognition between results desorption from s...