نتایج جستجو برای: two cultivated pea lands
تعداد نتایج: 2471048 فیلتر نتایج به سال:
Global temperature is increasing, especially over northern lands (>50 N), owing to positive feedbacks1. As this increase is most pronounced in winter, temperature seasonality (ST)—conventionally defined as the difference between summer and winter temperatures—is diminishing over time2, a phenomenon that is analogous to its equatorward decline at an annual scale. The initiation, termination and ...
1. Pea aphids (Acyrthosiphon pisum Harris; Hemiptera: Aphididae) exhibit transgenerational wing polyphenism, in which unwinged females produce genetically identical winged offspring in response to environmental cues such as overcrowding and predation risk that indicate poor habitat quality. 2. Laboratory experiments were carried out to explore the intensity of the wing polyphenic response of pe...
A significant stimulation (2- to 2.5-fold) of AdoMet synthetase was witnessed in glibberellicd acid (GA3, 1 microM)-treated epicotyls of the dwarf pea (Pisum sativum). This was accompanied by a 2.4-fold increase in the endogenous pool of S-adenosylmethionine. Both abscisic acid (10 microM) and cycloheximide (20 micrograms/ml) inhibited the GA3-mediated enhancement of AdoMet synthetase activity....
C-6 oxidation genes play a key role in the regulation of biologically active brassinosteroid (BR) levels in the plant. They control BR activation, which involves the C-6 oxidation of 6-deoxocastasterone (6-DeoxoCS) to castasterone (CS) and in some cases the further conversion of CS to brassinolide (BL). C-6 oxidation is controlled by the CYP85A family of cytochrome P450s, and to date, two CYP85...
To date, the standard treatment for chronic thromboembolic pulmonary hypertension (CTEPH) has been surgical pulmonary endarterectomy (PEA) followed by life-time anticoagulation therapy [1]. However, excellent results with PEA have been limited to select centres with experience and expertise; many patients who are possible candidates for PEA at expert centres would be considered ineligible in ma...
Focal cerebral ischemia (FCI) induces rapid neuronal death in the ischemic core, which gradually expands toward the penumbra, partly as the result of a neuroinflammatory response. It is known that propagation of neuroinflammation involves microglial cells, the resident macrophages of the brain, which are highly motile when activated by specific signals. However, the signals that increase microg...
Herbal medicine use is widely popular in Canada, in part because of growing interest in health promotion and folk healing in the general population, disenchantment with some biomedical therapies, and public awareness of herbal remedies due to advertising and media reports. Many therapeutic herbs are gathered from their natural habitats; few are widely cultivated. In addition, some consumers exp...
Abstract Organic cations influence the crystal packing and, less commonly, electronic structure of hybrid organic–inorganic materials. Two new compounds prepared from solution, (PEA)SbCl 6 and (PEA) 4 Sb 2 Cl 12 (PEA=phenylethylammonium), demonstrate how aromatic PEA cation modifies structures relative to inorganic antimony chlorides. In ethylammonium conformation results in a polar chiral stru...
Global temperature is increasing, especially over northern lands (> 50 ◦ N), owing to positive feedbacks1. As this in-‐ crease is most pronounced in winter, temperature seasonality (ST)—conventionally defined as the difference between sum-‐ mer and winter temperatures—is diminishing over time2, a phenomenon that is analogous to its equatorward decline at an annual scale. The initiation, termi...
استخراج مواد معطر از مواد طبیعی یک فرآیند مهم صنعتی است . در اینگونه فرآیندها از یک ماده آلی بعنوان واسطه استخراج استفاده می شود. ملکول اغلب مواد معطر هیدروفوب (آبگریز) بوده و حلالیت ناچیزی در آب دارند. در سال 1970 برای استخراج آبمیوه و عصاره مواد معطر از co2 مایع استفاده شد. بزودی این موضوع کشف شد که حالت بحرانی واسطه مناسبتری برای استخراج است و استخراج با سیال فوق بحرانی امروزه نقش مهمی را در...
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