OsSQD1 at the crossroads of phosphate and sulfur metabolism affects plant morphology and lipid composition in response to phosphate deprivation

2020 ◽  
Vol 43 (7) ◽  
pp. 1669-1690 ◽  
Author(s):  
Yafei Sun ◽  
Ajay Jain ◽  
Yong Xue ◽  
Xiaowen Wang ◽  
Gengmao Zhao ◽  
...  
Keyword(s):  
Lipid Composition ◽  
Sulfur Metabolism ◽  
Plant Morphology ◽  
Phosphate Deprivation

Inhibition of Platelet Aggregation by Ethanol in Vitro Shows Specificity for Aggregating Agent Used and Is Influenced by Platelet Lipid Composition

1982 ◽  
Vol 48 (01) ◽  
pp. 049-053 ◽  
Author(s):  
C G Fenn ◽  
J M Littleton
Keyword(s):  
Platelet Aggregation ◽  
Lipid Composition ◽  
Saturated Fatty Acids ◽  
Calcium Ionophore ◽  
Cholesterol Content ◽  
Membrane Lipid ◽  
Calcium Ionophore A23187 ◽  
Ionophore A23187 ◽  
Increased Sensitivity

SummaryEthanol at physiologically tolerable concentrations inhibited platelet aggregation in vitro in a relatively specific way, which may be influenced by platelet membrane lipid composition. Aggregation to collagen, calcium ionophore A23187 and thrombin (low doses) were often markedly inhibited by ethanol, adrenaline and ADP responses were little affected, and aggregation to exogenous arachidonic acid was actually potentiated by ethanol. Aggregation to collagen, thrombin and A23187 was inhibited more by ethanol in platelets enriched with saturated fatty acids than in those enriched with unsaturated fats. Platelets enriched with cholesterol showed increased sensitivity to ADP, arachidonate and adrenaline but this increase in cholesterol content did not appear to influence the inhibition by ethanol of platelet responses. The results suggest that ethanol may inhibit aggregation by an effect on membrane fluidity and/or calcium mobilization resulting in decreased activity of a membrane-bound phospholipase.

Pengembangan buku ajar praktikum mata kuliah morfologi tumbuhan di laboratorium biologi

2016 ◽  
Vol 1 (1) ◽  
pp. 1
Author(s):  
Suraida Suraida
Keyword(s):  
Research And Development ◽  
Learning Process ◽  
Teaching And Learning ◽  
Lesson Plan ◽  
Plant Morphology ◽  
The State ◽  
State Institute ◽  
Plan Execution ◽  
Islamic Studies ◽  
Biology Laboratory

Abstrak Penelitian ini dilakukan karena proses pembelajaran di laboratorium Biologi IAIN STS Jambi yang masih minim sarana prasarana yang ada di laboratorium, sehingga menghambat proses pembelajaran khususnya untuk mata kuliah Morfologi Tumbuhan. Penelitian ini bertujuan mengembangkan buku ajar praktikum dan mengetahui praktikalitasnya. Jenis Penelitian ini adalah penelitian pengembangan (Research and Development) dengan menggunakan 4-D Models yang terdiri dari 4 tahap yaitu Define, Design, Develop dan Disseminate. Karena adanya keterbatasan waktu dan biaya maka tahap disseminate tidak dilakukan. Produk yang dikembangkan berupa buku ajar praktikum yang divalidasi oleh validator. Produk yang telah divalidasi dan dinyatakan valid oleh validator, kemudian diujicobakan pada proses pembelajaran yang bertujuan untuk melihat nilai praktis buku ajar praktikum di laboratorium Biologi. Analisis data yang digunakan adalah data deskriptif untuk memvalidasi perangkat pembelajaran oleh pakar pendidikan. Selain itu juga diteliti data praktikalitas penggunaan perangkat pembelajaran ini yang diperoleh dari observasi dosen dan respon siswa. Nilai validitas produk 83,31% yang dikategorikan valid. Sementara nilai kepraktisan berdasarkan data observasi keterlaksanaan SAP, angket respon dosen dan siswa dikategorikan sangat baik atau sangat praktis. Penelitian menyimpulkan bahwa perangkat pembelajaran di Laboratorium Biologi yang dikembangkan adalah valid dan sangat praktis digunakan baik dosen maupun siswa. Kata Kunci : Pengembangan, buku ajar praktikum, laboratorium biologi Abstract [The development of a course book for plant morphology at biology laboratory] This research was triggered by the limited facilities of the biology laboratory at the State Institute of Islamic Studies Sulthan Thaha Saifuddin Jambi which became a constrain in the teaching and learning process of Plant Morphology classroom sessions. The objective of this research was to develop a course book as well as to reveal its practicality. The researcher did a research and development using 4-D Models consisting of four stages namely; define, design, develop, and disseminate. Considering the limitation of time and finance, the disseminate stage was not executed. The test revealed the validity score of the product was 83,31% which categorized as good. For its practicality, the product was considered as very good based on observation of lesson plan execution and lecturers’ and students’ response. In summary, the course book developed for the course at Biology Laboratory was categorized as valid and practical to be used by both students and lecturers. Keywords: development, a course book, biology laboratory

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