18 research outputs found

    Calcium-regulated processes in plant organelles

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    Calcium-regulated processes in plant organelles

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    Consumer Evaluations Of Beautification Products: Effects Of Extrinsic Cues

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    This study investigates the influence of extrinsic cues, i.e. brand image, perceived price, perceived quality, and perceived country of origin on consumers' evaluative judgments for beautification products. Multi-item measures were used for data collection. Results revealed that three extrinsic cues: brand image, perceived quality, and perceived country of origin have positive and significant influence on consumers' brand evaluation of beautification brands. Only perceived price has shown no such influence on consumers' brand evaluation. Finally, unanswered questions and future research directions are presented

    The High Light Response in Arabidopsis Requires the Calcium Sensor Protein CAS, a Target of STN7-and STN8-Mediated Phosphorylation

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    Reversible phosphorylation of thylakoid proteins contributes to photoacclimation responses in photosynthetic organisms, enabling the fine-tuning of light harvesting under changing light conditions and promoting the onset of photoprotective processes. However, the precise functional role of many of the described phosphorylation events on thylakoid proteins remains elusive. The calcium sensor receptor protein (CAS) has previously been indicated as one of the targets of the state transition kinase 8 (STN8). Here we show that in Arabidopsis thaliana, CAS is also phosphorylated by the state transition kinase 7 (STN7), as well as by another, so-far unknown, Ca2+-dependent kinase. Phosphoproteomics analysis and in vitro phosphorylation assays on CAS variants identified the phylogenetically conserved residues Thr-376, Ser-378, and Thr-380 as the major phosphorylation sites of the STN kinases. Spectroscopic analyses of chlorophyll fluorescence emission at 77K further showed that, while the cas mutant is not affected in state transition, it displays a persistent strong excitation of PSI under high light exposure, similar to the phenotype previously observed in other mutants defective in photoacclimation mechanisms. Together with the observation of a strong concomitant phosphorylation of light harvesting complex II (LHCII) and photosynthetic core proteins under high irradiance in the cas mutant this suggests a role for CAS in the STN7/STN8/TAP38 network of phosphorylation-mediated photoacclimation processes in Arabidopsis

    The evaluation between vitamin D level and pelvic organ prolapse in post-menopausal women

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    Background: Vitamin D is important for skeletal integrity and optimal muscle function. The high incidence and prevalence of vitamin D deficiency and pelvic organ prolapse have been found in postmenopausal women, raising the question of whether the entities are related. The aim of the study was to evaluation between vitamin D level and pelvic organ prolapse in post-menopausal women. Methods: This case control study has been designed and conducted in the Department of Obstetrics and Gynecology, BSMMU to investigate the level of vitamin D in patients with and without pelvic organ prolapse to explore the association of vitamin D with pelvic organ prolapse. After taking informed written consent the serum vitamin D level of all participants was measured by CMIA technology with flexible assay protocols at Biochemistry and Molecular Biology department of the same institute. Statistical analysis of the results was obtained by using window-based computer software devised with Statistical Packages for Social Sciences (SPSS-24). Results: The study population was divided into two groups, a case group (n=74) consisting of patients with pelvic organ prolapse and a control group (n=74) comprising of women without pelvic organ prolapse. A total 148 participants of 52 years or older attending the out or inpatient department were enrolled in the study. Mean±SD level of Vitamin D in the case group was 13.96±5.18 ng/ml and in the control, group was 21.08±5.77 ng/ml respectively. The difference was statistically significant (p<0.05). Moreover, the vitamin D levels were inversely proportionate with the severity of pelvic organ prolapse. Conclusions: Vitamin D deficiency may be an important systemic factor associated with pelvic organ prolapse. Measuring vitamin D levels in postmenopausal women and replenishing deficiencies may also be important for the pelvic floor

    INOSITOL (1,3,4) TRIPHOSPHATE 5/6 KINASE1-Dependent Inositol Polyphosphates Regulate Auxin Responses in Arabidopsis

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    The combinatorial phosphorylation of myo-inositol results in the generation of different inositol phosphates (InsPs), of which phytic acid (InsP6) is the most abundant species in eukaryotes. InsP6 is also an important precursor of the higher phosphorylated inositol pyrophosphates (PP-InsPs), such as InsP7 and InsP8, which are characterized by a diphosphate moiety and are also ubiquitously found in eukaryotic cells. While PP-InsPs regulate various cellular processes in animals and yeast, their biosynthesis and functions in plants has remained largely elusive because plant genomes do not encode canonical InsP6 kinases. Recent work has shown that Arabidopsis (Arabidopsis thaliana) INOSITOL (1,3,4) TRIPHOSPHATE 5/6 KINASE1 (ITPK1) and ITPK2 display in vitro InsP6 kinase activity and that, in planta, ITPK1 stimulates 5-InsP7 and InsP8 synthesis and regulates phosphate starvation responses. Here we report a critical role of ITPK1 in auxin-related processes that is independent of the ITPK1-controlled regulation of phosphate starvation responses. Those processes include primary root elongation, root hair development, leaf venation, thermomorphogenic and gravitropic responses, and sensitivity to exogenously applied auxin. We found that the recombinant auxin receptor complex, consisting of the F-Box protein TRANSPORT INHIBITOR RESPONSE1 (TIR1), ARABIDOPSIS SKP1 HOMOLOGUE 1 (ASK1) and the transcriptional repressor INDOLE-3-ACETIC ACID INDUCIBLE 7 (IAA7), binds to anionic inositol polyphosphates with high affinity. We further identified a physical interaction between ITPK1 and TIR1, suggesting a localized production of 5-InsP7, or another ITPK1-dependent InsP/PP-InsP isomer, to activate the auxin receptor complex. Finally, we demonstrate that ITPK1 and ITPK2 function redundantly to control auxin responses, as deduced from the auxin-insensitive phenotypes of itpk1 itpk2 double mutant plants. Our findings expand the mechanistic understanding of auxin perception and suggest that distinct inositol polyphosphates generated near auxin receptors help to fine-tune auxin sensitivity in plants

    Review of the adaptive re-use of three colonial buildings in Dhaka, Bangladesh

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    Adaptive reuse is a process of redevelopment and regeneration of historic building that can be reuse for new purposes which provides social, environmental and economic benefits. Bangladesh have experienced long colonial past (1757 to 1947). During colonial period developed many significant buildings with colonial style and character. These buildings had strong impact on society, culture and history. However, many of these colonial buildings are not conserving and well documented for future generation. As a result, several colonial buildings are gradually decaying and abandonedor used by illegal people. Very few buildings are conserving and reusing by the government however, most of these buildings are in critical condition. In this study, we evaluated the current situations of conservation and adaptive reuse of three British colonial buildings (Ahsan Monzil, Curzon Hall and Ruplal House) in Dhaka, Bangladesh. To get the optimum result, three British colonial buildings selected as sample and qualitative methods applied for study. Interview, documents study and observation are the three main techniques for qualitative method, which applied for data collection. In order to identify the challenges or problems between the conservation practice and current condition of adaptive reuse, have analyzed in existing framework or guide lines that provided by the government of Bangladesh and international conservation principles, which delivered by the UNESCO, ICOMOS, ICCOROM and international Charters. Based on the data collections have revealed multiple causes, which severely effects to the longevity and adaptive reuse of British colonial buildings, such as: lack of proper planning and guidelines by the government, insufficient fund, lack of expert technical people, ignorance of implementation, weaken of monitoring system and lack of people’s awareness. In such a deplorable condition, it is essential to reform the government framework, which followed by the international guidelines that provided by the international organizations and at the same time can full fill the all aspects and needs of Bangladesh’s colonial buildings adaptive reuse. If the government and related authorities initiates these types of actions, the people will get multiple benefits from adaptive reuse of colonial buildings, such as economic, social, cultural, job opportunity, recreational, environmental and logical connection with the past and future generation

    Protective effect of tomato against adrenaline-induced myocardial infarction in rats

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    Lycopene, a carotenoid rich in tomato fruit (ripe), is an effective antioxidant and free radical scavenger. In this study n-hexane extract of tomato was evaluated for its protective action against oxidative stress in experimental myocardial infarction induced by administration of adrenaline in rats. Adrenaline produced significant elevation of malondialdehyde content of heart, an indicator of lipid peroxidation, with a significant rise in serum aspartate aminotransferase (AST) level and different grades of necrotic changes in myocardium. Rats were treated with two doses of n-hexane extract of tomato, intragastrically daily for one month prior to administration of adrenaline on the 31 st and 32 nd day. Pretreatment of tomato extract (1 mg/kg, 2 mg/kg) and vitamin E (50 mg/kg) significantly reduced the malondialdehyde concentration in heart and significantly lowered the serum AST level in adrenaline treated rats. Myocardial necrosis was significantly prevented by pretreatment. These results suggest that n-hexane extract of tomato possesses antioxidative property that may protect heart against catecholamine induced myocardial infarction
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