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2022

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Isolation And Characterization Of Culturable Endophytic Plant Growth-Promoting Bacillus Species From Mentha Longifolia L., Burak Alaylar Jan 2022

Isolation And Characterization Of Culturable Endophytic Plant Growth-Promoting Bacillus Species From Mentha Longifolia L., Burak Alaylar

Turkish Journal of Agriculture and Forestry

Plant growth-promoting bacteria is one of the most popular promising alternative fertilizers for sustainable agriculture. Hence, it is preferred by agriculturalists today due to its nontoxic, eco-friendly, and affordable costs as well as its benefits on agricultural products. Among these microorganisms, Bacillus is a widely known and investigated genus in rhizosphere of plenty of agricultural products. In the current study, endophytic Bacillus strains were isolated from the root, stem, and leaves of healthy Mentha longifolia L. in Palandöken Mountain, Erzurum-Turkey and evaluated their plant growth promoting parameters such as nitrogen fixation, phosphate solubilization, IAA, siderophore, ACC deaminase, HCN production, and …

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Cover And Contents Jan 2022

Cover And Contents

Turkish Journal of Agriculture and Forestry

No abstract provided.

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Multidimensional Scaling Analysis Of Sensory Characteristics And Quantitative Traits Inwild Apricots, Rabi̇a Albayrak Deli̇ali̇oğlu, Hati̇ce Dumanoğlu, Veli̇ Erdoğan, Sai̇d Efe Dost, Ali̇ Kesi̇k, Zahi̇de Kocabaş Jan 2022

Multidimensional Scaling Analysis Of Sensory Characteristics And Quantitative Traits Inwild Apricots, Rabi̇a Albayrak Deli̇ali̇oğlu, Hati̇ce Dumanoğlu, Veli̇ Erdoğan, Sai̇d Efe Dost, Ali̇ Kesi̇k, Zahi̇de Kocabaş

Turkish Journal of Agriculture and Forestry

The Cappadocia Region in Central Anatolia, Turkey is rich in wild apricot genetic resources. In this study, a multivariate analysis method of metric and nonmetric multidimensional scaling analysis (MDS) was used to classify 43 wild apricot genotypes and 5 standard cultivars by using Euclidean distance. MDS was applied, based on dissimilarities, to quantitative traits of weight, height, width and thickness of fruit, stone and kernel weight, flesh/stone ratio, total soluble solids content, titratable acidity and pH in fruit juice, and sensory attributes of fruit size and shape, cavity depth, suture (cheek line), fruit apex, fruit attractiveness, skin pubescence, ground and …

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Ameliorative Effects Of Nitric Oxide On Growth, Physiology And Biochemistry Of Chickpeaplants Under Salinity Stress, Esi̇n Dadaşoğlu Jan 2022

Ameliorative Effects Of Nitric Oxide On Growth, Physiology And Biochemistry Of Chickpeaplants Under Salinity Stress, Esi̇n Dadaşoğlu

Turkish Journal of Agriculture and Forestry

Salinity is one of the major environmental constraints affecting agriculture in major regions of the world. This study was conducted to evaluate the effect of exogenous nitric oxide (NO) treatments on two chickpea cultivars (Cagatay and Inci) under salt stress conditions. Different NO doses (0. 75 and 100 μM sodium nitroprusside (SNP)) as an NO source were applied to chickpea plants grown under saline (presence of 50 and 100 mM of NaCl) and nonsaline conditions. In this study, plant shoot fresh and dry weight, root fresh and dry weight, chlorophyll a, b, total chlorophyll, chlorophyll reading value (CRV), relative water …

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Characterization Of Volatile Compounds Nongrafted And Pumpkin-Grafted Bitter Gourd(Momordica Charantia L.), Arzu Karataş, Yusuf Şavşatli Jan 2022

Characterization Of Volatile Compounds Nongrafted And Pumpkin-Grafted Bitter Gourd(Momordica Charantia L.), Arzu Karataş, Yusuf Şavşatli

Turkish Journal of Agriculture and Forestry

Bitter melon (Momordica charantia L.) is a unique vegetable-fruit possessing several multifarious health benefits. In this study, the plant extraction obtained from grafted bitter gourd onto pumpkin (Cucurbita maxima) and nongrafted bitter gourd cultivated under greenhouse conditions were evaluated for their constituents of volatile compounds. Gas chromatography-mass spectrometry (SPMEGC-MS) techniques were employed to determine these compounds in the leaves (young, middle, and old-age) and fruits (unripe and ripe) of bitter gourd. The volatile compounds in the leaves of pumpkin during the three stages mentioned above were also investigated. Overall, 72 in leaves and 56 in fruits of bitter gourd compounds …

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Morphological Characterisation And Volatile Analysis Of Turkish Garlic Genotypes, Selen Akan Jan 2022

Morphological Characterisation And Volatile Analysis Of Turkish Garlic Genotypes, Selen Akan

Turkish Journal of Agriculture and Forestry

Garlic is one of the most important vegetables and used for nutrient and medicinal purposes since ancient times. Deficiency in the detection of high-quality garlic genotypes with a rich biochemical profile is one of the main constraints in limiting the production. Currently, the selection and identification of promising garlic genotypes is a popular target, and to reach the best results it is necessary to clarify discrimination. This study aims to discriminate the garlic genotypes obtained from different cultivation locations in Turkey. For that purpose, firstly, morphological characters including biometric parameters were measured based on 18 morphological traits. Particular correlations related …

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The Effects Of Melatonin Application On The Drought Stress Of Different Citrus Rootstocks, Nazan Korkmaz, Mehmet Ati̇lla Aşkin, Hakan Altunlu, Mehmet Polat, Volkan Okatan, İbrahi̇m Kahramanoğlu Jan 2022

The Effects Of Melatonin Application On The Drought Stress Of Different Citrus Rootstocks, Nazan Korkmaz, Mehmet Ati̇lla Aşkin, Hakan Altunlu, Mehmet Polat, Volkan Okatan, İbrahi̇m Kahramanoğlu

Turkish Journal of Agriculture and Forestry

Drought is among the most crucial limiting factors for crop production and is considered a major threat to food security. Rootstock selection is an important approach for drought management. This research was aimed to study the responses of important rootstocks against drought stress and to examine the impacts of melatonin application on the drought stress of these rootstocks. Carrizo citrange, fying dragon, and sour orange were selected for the current study. To test the drought stress, three different irrigation regimes were applicated separately to each rootstock as 100%, 75%, and 50% of water requirement. The melatonin was then tested on …

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Assessment Of Safflower Genotypes For Individual And Combined Effects Of Drought And Salinity Stress At Early Seedling Growth Stages, Fatma Kayaçeti̇n Jan 2022

Assessment Of Safflower Genotypes For Individual And Combined Effects Of Drought And Salinity Stress At Early Seedling Growth Stages, Fatma Kayaçeti̇n

Turkish Journal of Agriculture and Forestry

Safflower is a highly valued oilseed crop. Safflower oil is a source of monounsaturated and polyunsaturated fatty acids which are important for a plurality of industries including the edible vegetable oil industry. Safflower is highly resistant to salinity and drought stress, which impede seed germination. Two safflower cultivars and 4 lines were screened against nine levels of osmotic stress treatments (using NaCl0 and PEG 60000 (control), NaCl-0.2, NaCl-0.4, PEG 6000-0.2, PEG 6000-0.4, PEG 6000-0.2+NaCl-0.2, PEG 6000-0.2+NaCl-0.4, PEG 6000-0.4+NaCl-0.2, PEG 6000-0.4+NaCl-0.4 MPa) for 8 days at seed germination stage. The osmotic stress was observed to induce a negative effect on the …

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Integrated Application Of Plant Growth Promoting Rhizobacteria And Biochar Improves Salt Tolerance In Eggplant Seedlings, Razi̇ye Kul Jan 2022

Integrated Application Of Plant Growth Promoting Rhizobacteria And Biochar Improves Salt Tolerance In Eggplant Seedlings, Razi̇ye Kul

Turkish Journal of Agriculture and Forestry

A pot study was conducted to determine the effects of the combination of plant growth promoting rhizobacteria (PGPR) and biochar on the growth, physiological, and biochemical characteristics of eggplant seedlings under salinity stress. The greenhouse experiment included two salinity levels of NaCl [S0 (0 mM NaCl) and S1 (100 mM NaCl)], three biochar levels [B0 (non-biochar), B1 (5%) and B2 (10%)] and two PGPR [R0 (non-PGPR), R1 (combination of Bacillus megaterium TV-6D, Paenibacillus polymyxa KIN- 37, and Pantoea agglomerans RK92). Results showed that plant growth, relative leaf water content (LRWC), and chlorophyll content of eggplant seedlings decreased significantly, while malondialdehyde …

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Biochemical Content Of Cherry Laurel (Prunus Laurocerasus L.) Fruits With Edible Coatings Based On Caseinat, Semperfresh And Lecithin, Yasemi̇n Yavuz Abanoz, Zühal Okcu Jan 2022

Biochemical Content Of Cherry Laurel (Prunus Laurocerasus L.) Fruits With Edible Coatings Based On Caseinat, Semperfresh And Lecithin, Yasemi̇n Yavuz Abanoz, Zühal Okcu

Turkish Journal of Agriculture and Forestry

Cherry laurel is one of the most important cherry species and naturally grown in Black sea region in Turkey. Its fruits are sold at high price in local markets in northern parts of Turkey. Cherry laurel fruits are very perishable with a limited shelf life due to a high metabolic activity and susceptibility to mechanical damage and microbial attack. The effect of edible coatings (EC) based on caseinat, Semperfresh and lecithin on the fruit quality, bioactive content and antioxidant activity of cherry laurel fruits stored at 4 ± 1 °C for 15 days was evaluated. The EC fruits compared with …

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Cover And Contents Jan 2022

Cover And Contents

Turkish Journal of Agriculture and Forestry

No abstract provided.

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Some Fermentation Parameters Affecting The Cell Growth Of Saccharomyces Cerevisiae And The Qualities Of Black Rice Beverage, Aung Pyae Jan 2022

Some Fermentation Parameters Affecting The Cell Growth Of Saccharomyces Cerevisiae And The Qualities Of Black Rice Beverage, Aung Pyae

Chulalongkorn University Theses and Dissertations (Chula ETD)

Black rice (Hom Nil: Oryza sativa) is well-known for their health benefits thanks to their high content in proteins, fibers, vitamins and minerals as well as their abundance in phenolic compounds. These compounds contribute to the color and antioxidant properties of the black rice. Thus, the aim of the study was to conduct fermentation on black rice using two varieties of yeast strains, Saccharomyces cerevisiae SC90 and M30, over the course of 10 days comparing temperature and sucrose adding. The obtained data can be utilized in designing and developing a functional fermented beverage with black rice. In the process, black …

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Effects Of Thai Traditional Formularies Medicine Treatment In The Breast Cancer Mouse Model, Ariya Khamwut Jan 2022

Effects Of Thai Traditional Formularies Medicine Treatment In The Breast Cancer Mouse Model, Ariya Khamwut

Chulalongkorn University Theses and Dissertations (Chula ETD)

Breast cancer (BC) is an important global health problem impacting women globally. Standard treatments are also limited, so developing novel alternative therapies is needed. Thai traditional formulary medicines (TTFMs) comprise various herbs, which have been reported to contain anti-cancer properties to treat several types of cancer. The TTFM recipes utilized in the current investigation were taken from the traditional Thai medicine scripture, Atisaravak scripture. These TTFMs have been used to treat cancer and digestive systems disorders. Nevertheless, the impact of TTFMs' anti-cancer activities on breast cancer is poorly understood. Moreover, the underlying molecular mechanism of TTFM still needs to be …

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Revisiting Clickers: In-Class Questions Followed By At-Home Reflections Are Associated With Higher Student Performance On Related Exam Questions, Dana L. Kirkwood-Watts, Emily K. Bremers, Emily Robinson, Kathleen R. Brazeal, Brian A. Couch Jan 2022

Revisiting Clickers: In-Class Questions Followed By At-Home Reflections Are Associated With Higher Student Performance On Related Exam Questions, Dana L. Kirkwood-Watts, Emily K. Bremers, Emily Robinson, Kathleen R. Brazeal, Brian A. Couch

School of Biological Sciences: Faculty Publications

Clicker questions are a commonly used active learning technique that stimulates student interactions to help advance understanding of key concepts. Clicker questions are often administered with an initial vote, peer discussion, and a second vote, followed by broader classroom explanation. While clickers can promote learning, some studies have questioned whether students maintain this performance on later exams, highlighting the need to further understand how student answer patterns relate to their understanding of the material and to identify ways for clickers to benefit a broader range of students. Systematic requizzing of concepts during at-home assignments represents a promising mechanism to improve …

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Effect Of Cinnamon And Nutmeg Essential Oils On The Smoked Meat (Se'i Sapi) Quality, Ulil Afidah Jan 2022

Effect Of Cinnamon And Nutmeg Essential Oils On The Smoked Meat (Se'i Sapi) Quality, Ulil Afidah

Chulalongkorn University Theses and Dissertations (Chula ETD)

Se’i sapi is a traditional Indonesian smoked meat product that is normally degraded by both microorganisms and lipid oxidation. The aim of this study was to determine the effect of essential oils on the quality of sterilized se’i sapi. Firstly, antioxidant activity and total phenolic compounds of cinnamon (CEO) and nutmeg (NEO) essential oils, and liquid smoke were investigated. It was found that CEO and NEO had good potential on their antioxidant activities, while liquid smoke exhibited very low antioxidant activity. Total phenolic content of CEO and NEO showed a high value, which were 110.64 and 109.13 mg GAE/g, respectively. …

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The Observation Of Relative Occlusal Forces Of Posterior Implant-Supported Fixed Prostheses In Tooth-Borne And Distal End Circumstance By Using T-Scan System : A Prospective Study, Jinjudhapak Thongdee Jan 2022

The Observation Of Relative Occlusal Forces Of Posterior Implant-Supported Fixed Prostheses In Tooth-Borne And Distal End Circumstance By Using T-Scan System : A Prospective Study, Jinjudhapak Thongdee

Chulalongkorn University Theses and Dissertations (Chula ETD)

Objectives: to assess the relative occlusal forces (ROF) of posterior implants in two different occlusion designs in tooth-borne and distal end circumstances over time using the T-scan system and to compare the marginal bone loss in those situations and designs over time. Material and methods: Twenty patients requiring single posterior or distal end implants were randomly assigned to two groups: Implant-protected occlusion (IPO) or load (LOAD). The ROFs were measured using a T-scan on five occasions. Custom-made jigs were used to collect periapical parallel x-rays. The implant platforms were used as a reference to assess marginal bone loss. Results: In …

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A Comparison Of Shear Bond Strength On Human Dentin Using Acrylic Resin Cement And Self-Adhesive Resin Cements With The Use Of Universal Adhesives, Phatcha Maiwatana Jan 2022

A Comparison Of Shear Bond Strength On Human Dentin Using Acrylic Resin Cement And Self-Adhesive Resin Cements With The Use Of Universal Adhesives, Phatcha Maiwatana

Chulalongkorn University Theses and Dissertations (Chula ETD)

Objective: To evaluate the shear bond strength of human dentin with two different phosphate-monomer containing self-adhesive resin cements, an acrylic resin cement, and the effect of universal adhesive pretreatment on human dentin. Materials and Methods: Fifty extracted human third molars with the superficial dentin exposure at the buccal side were prepared. Resin composite cylinders with 2.38 mm diameter were cemented with 5 groups of resin cements and universal adhesives: Rely X U200, Single Bond Universal Adhesive with Rely X U200, Panavia SA Luting Multi, Clearfil Tri-S Bond Universal Quick with Panavia SA Luting Multi, and Super Bond C&B. Then, the …

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Translation And Validation Of A Thai Version Of The Xerostomia Inventory, Chotima Lapnimitanun Jan 2022

Translation And Validation Of A Thai Version Of The Xerostomia Inventory, Chotima Lapnimitanun

Chulalongkorn University Theses and Dissertations (Chula ETD)

Objective: This study aimed to translate and validate the Xerostomia Inventory (XI) and Summated Xerostomia Inventory (SXI) -Thai version in Thai middle-aged and older adults Methods: This study was a cross-sectional study which consisted of translation and validation phases. The XI and SXI were cross-culturally forward and backward translated and validated in 200 middle-aged and older Thai adults. The validity relied on the content, construct, and criterion validity. The reliability was determined by internal consistency. Results: The translation was done with good content validity. Both discriminant validity, which can distinguish between xerostomia and non-xerostomia groups, and the convergent validity, which …

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Anti-Neuroinflammatory Effects And Underlying Mechanismsof Cleistocalyx Nervosum Var. Paniala Extracts In Microglia Cells, Sakawrat Janpaijit Jan 2022

Anti-Neuroinflammatory Effects And Underlying Mechanismsof Cleistocalyx Nervosum Var. Paniala Extracts In Microglia Cells, Sakawrat Janpaijit

Chulalongkorn University Theses and Dissertations (Chula ETD)

Sustained inflammatory responses have been implicated in various neurodegenerative disorders. Cleistocalyx nervosum var. paniala (CN), an edible berry, has been reported to exhibit several beneficial properties. However, only limited research is available on this fruit seed, which is classified as agricultural food waste. We therefore focused on the anti-neuroinflammatory effects and underlying mechanism of C. nervosum var. paniala seed extract (CNSE) on BV-2 mouse microglial cells induced by lipopolysaccharide (LPS) or tumor necrosis factor-alpha (TNF-α). CN seeds were extracted in 95% ethanol by Soxhlet extraction. HPLC was carried out to identified resveratrol (RESV) in CNSE. For cell-based studies, the expression …

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Association Between Cotinine Levels And The Semen Quality Among Male Tobacco Farmers In Sukhothai Province, Thailand, Anu Surach Jan 2022

Association Between Cotinine Levels And The Semen Quality Among Male Tobacco Farmers In Sukhothai Province, Thailand, Anu Surach

Chulalongkorn University Theses and Dissertations (Chula ETD)

Thai traditional tobacco is one of the greatest public health problems. Tobacco leaves contains nicotine that may impacts on the quality of life of tobacco farmers. The study aimed to explore the association of work-related factors on salivary cotinine levels and semen quality among male tobacco farmers in Sukhothai Province, Thailand. This was a longitudinal study of 62 participants aged 20-40 years without reproductive disease, chronic disease, obesity, and psychiatric disease in Sukhothai Province, Thailand. Data were collected three times during processing of cultivation tobacco growing in March to May 2022. A self-administered questionnaire was used to collect on individual …

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Stimuli-Responsive Chitosan-Based Hydrogels For Antibiotic Delivery, Tu Tran Vo Minh Jan 2022

Stimuli-Responsive Chitosan-Based Hydrogels For Antibiotic Delivery, Tu Tran Vo Minh

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study aims to investigate hydrogels fabricated via green approaches for drug delivery application. Biocompatible polymer-based drug delivery systems (DDS) have gained popularity in recent years because of their ability to improve the efficacy and safety of drug delivery by providing targeted and sustained release of drugs to reduce the frequency of dosing, making it more convenient for patients. Chitosan is one of the polymers commonly used for this purpose due to their higher water retention and porosity, which create space for loading medicine into the matrix. However, the potential utilization of endogenous and exogenous stimuli controlling drug release still …

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ข้อจํากัดของกระบวนการคัดค้านภายใต้กฎหมายสิทธิบัตรไทย, ปรีณาภา ศิริพานิช Jan 2022

ข้อจํากัดของกระบวนการคัดค้านภายใต้กฎหมายสิทธิบัตรไทย, ปรีณาภา ศิริพานิช

Chulalongkorn University Theses and Dissertations (Chula ETD)

กระบวนการคัดค้านตามมาตรา 31 ถึงมาตรา 32 ในพระราชบัญญัติสิทธิบัตร พ.ศ. 2522 (และฉบับแก้ไขเพิ่มเติม) และมาตรา 32/2 ตามร่างพระราชบัญญัติสิทธิบัตร (ฉบับที่ ... ) พ.ศ. .... ที่อยู่ระหว่าง การพิจารณา มีเจตนารมณ์ให้บุคคลภายนอกเข้ามามีส่วนร่วมในกระบวนการตรวจสอบสิทธิบัตร และ ในทางกลับกัน เพื่อสร้างความแน่นอนให้กับคุณภาพของกระบวนการรับจดทะเบียนสิทธิบัตร แต่ในประเทศไทย จำนวนการยื่นคำคัดค้านมีสัดส่วนค่อนข้างน้อยเมื่อเทียบกับปริมาณการยื่นคำขอรับสิทธิบัตร ทั้งบทบัญญัติที่เกี่ยวข้องยังไม่ชัดเจนทำให้การดำเนินการไม่แน่นอน บทบัญญัติเกี่ยวกับกระบวนการคัดค้านในกฎหมายสิทธิบัตรไทยจึงเป็นประเด็นที่ควรศึกษาทบทวนถึงความสอดคล้องเหมาะสมกับบริบทของประเทศไทยในปัจจุบัน เมื่อศึกษากระบวนการคัดค้านตามบทบัญญัติของกฎหมายไทยเปรียบเทียบกับกระบวนการคัดค้านรูปแบบต่าง ๆ ในต่างประเทศ โดยเลือกกฎหมายสิทธิบัตรออสเตรเลีย ญี่ปุ่น สหรัฐอเมริกา อินเดีย และสิงคโปร์ มาเป็นกรณีศึกษา ประกอบกับคำวินิจฉัยของอธิบดีกรมทรัพย์สินทางปัญญาและคณะกรรมการสิทธิบัตร รวมถึงข้อมูลทางสถิติเกี่ยวกับกระบวนการคัดค้านและข้อมูลจากการสัมภาษณ์ผู้เชี่ยวชาญด้านสิทธิบัตร พบว่าบทบัญญัติของกฎหมายสิทธิบัตรไทยในปัจจุบันทำให้เกิดอุปสรรคในการดำเนินการแก่คู่กรณีทั้งสองฝ่าย ทั้งร่างกฎหมายสิทธิบัตรยังอาจก่อให้เกิดประเด็นปัญหาที่ทำให้การดำเนินการไม่สอดคล้องกับเจตนารมณ์ของกระบวนการ นอกจากนี้ บทบัญญัติของกฎหมายยังขาดแนวทางที่ชัดเจนในการดำเนินการของคู่กรณีและการพิจารณาของพนักงานเจ้าหน้าที่อีกด้วย วิทยานิพนธ์นี้จึงเสนอให้ประเทศไทยแก้ไขเพิ่มเติมบทบัญญัติเกี่ยวกับกระบวนการคัดค้าน เพื่อลดทอนข้อจำกัดอันสร้างความไม่เป็นธรรมแก่คู่กรณีและเป็นอุปสรรคในการให้กระบวนการคัดค้านบรรลุเป้าหมายตามเจตนารมณ์ของกฎหมาย เพื่อส่งเสริมให้กฎหมายสิทธิบัตรสนับสนุนให้เกิดการคิดค้นพัฒนา และเปิดเผยการประดิษฐ์สู่สาธารณชน อันจะนำไปสู่การพัฒนาอย่างยั่งยืน

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Synthesis Of Functionalized Porphyrins For Application As Soft Materials, Dumrongsak Aryuwananon Jan 2022

Synthesis Of Functionalized Porphyrins For Application As Soft Materials, Dumrongsak Aryuwananon

Chulalongkorn University Theses and Dissertations (Chula ETD)

The series of functionalized porphyrins was designed and synthesized by varying para-substituents on meso-position of porphyrin ring as ether, ester, and urea with three different long alkyl chains (3-5, 7-9, 11). Afterwards, metalation of porphyrin derivatives by some 3d metals to serve as soft materials, liquid crystal, and axial ligands were introduced to provide spin-crossover property. Each series of functionalized porphyrin derivatives with three different chain lengths (3-5, 7-9, 11) and their Co(II) (3-5a,7-9a), Ni(II) (3-5b,7-9b), and Fe (III) (3-5c,7-9c) complexes were characterized by spectroscopic techniques consisting of NMR, IR, UV-visible and MS. The desired compounds were studied their mesomorphic …

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Superhydrophobic Polydimethylsiloxane For Fabrication Of Digital Magnetofluidics, Pakakan Ngernpradab Jan 2022

Superhydrophobic Polydimethylsiloxane For Fabrication Of Digital Magnetofluidics, Pakakan Ngernpradab

Chulalongkorn University Theses and Dissertations (Chula ETD)

In this work, polydimethylsiloxane (PDMS), a well-known material for microfluidic devices, was used to fabricate a digital magnetofluidic device. The use of PDMS material allows for easy fabrication and flexibility. The superhydrophobic property of PDMS surface was easily achieved using a one-pot method by reduction between chloroauric acid and sodium formate. The superhydrophobic property of PDMS surface was investigated using water contact angle (WCA) and contact angle hysteresis, which were found to be 163.9° and 0°, respectively, indicating the superhydrophobic surface. The morphology of gold coated PDMS surface was characterized using a scanning electron microscope (SEM), an X-ray diffractometer (XRD), …

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The Influence Of Extracellular Matrix On Human Periodontal Ligament Stem Cell Properties, Daneeya Na Nan Jan 2022

The Influence Of Extracellular Matrix On Human Periodontal Ligament Stem Cell Properties, Daneeya Na Nan

Chulalongkorn University Theses and Dissertations (Chula ETD)

The periodontal ligament (PDL) is a crucial tissue connecting teeth to surrounding alveolar bone, withstanding the mechanical forces of mastication, speech, and deglutition. The extracellular matrix (ECM) of the PDL plays a critical role in maintaining PDL cell stability and function in response to external forces. Mechanotransduction, the process by which cells convert mechanical signals into biochemical signals, is essential for PDL cells to sense and respond to mechanical stimuli. The ECM is a critical mediator of mechanotransduction, as it is responsible for transmitting mechanical forces to cells and regulating cellular responses to mechanical stress. Matricellular proteins, such as periostin …

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Application Of Potassium, Zinc And Boron As Potential Plant Growth Modulators In Gossypium Hirsutum L. Under Heat Stress, Muhammad Sarwar, M Farrukh Saleem, Basharat Ali, Muhammad Hamzah Saleem, Muhammad Rizwan, Kamal Usman, Ali El Keblawy, Asjad Ali, Muhammad Afzal, Mohamed S. Sheteiwy, Shafaqat Ali Jan 2022

Application Of Potassium, Zinc And Boron As Potential Plant Growth Modulators In Gossypium Hirsutum L. Under Heat Stress, Muhammad Sarwar, M Farrukh Saleem, Basharat Ali, Muhammad Hamzah Saleem, Muhammad Rizwan, Kamal Usman, Ali El Keblawy, Asjad Ali, Muhammad Afzal, Mohamed S. Sheteiwy, Shafaqat Ali

Turkish Journal of Agriculture and Forestry

High temperature stress at reproductive stages of cotton crop severely affects the yield and quality of cotton crop under changing climatic conditions. To alleviate the adverse effects of high temperature stress on cotton crop, the regulatory effects of potassium (K), zinc (Zn), and boron (B) were assessed by applying different temperature regimes at three reproductive stages of cotton crop under field and glass house conditions. Cotton plants were subjected to low (32/20 °C ± 2), medium (38/24 °C ± 2), and high (45/30 °C ± 2) temperatures under glasshouse, but sown at specific dates in field to provide different temperatures …

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Computational Modeling Of Benzyl Alcohol Oxidation Coupled With Hydrogen Production In A Photoelectrochemical Reactor, Thorfhan Hanamorn Jan 2022

Computational Modeling Of Benzyl Alcohol Oxidation Coupled With Hydrogen Production In A Photoelectrochemical Reactor, Thorfhan Hanamorn

Chulalongkorn University Theses and Dissertations (Chula ETD)

In photoelectrochemical (PEC) cells, hydrogen production at the cathode must be coupled with the oxidation reaction at the anode. Selective oxidation of benzyl alcohol into benzaldehyde is an attractive alternative pathway due to its lower overpotential than the traditional oxygen evolution reaction (OER). In this work, simulation of selective oxidation of benzyl alcohol into benzaldehyde paired with hydrogen production in 2 chambers of 2-dimensional PEC reactor was studied using COMSOL Multiphysics (5.6). Charge transport and electrochemical kinetics were simulated using Nernst Planck’s and Butler Volmer's equations, respectively. The results have showed that hydrogen and benzaldehyde concentrations on electrode surfaces increased …

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Réduction Des Risques Lors Des Interventions En Espace Clos : Développement D’Une Base De Connaissances Sur La Prévention Intrinsèque Et La Protection Collective, Damien Burlet-Vienney, Yuvin Chinniah, Ali Bahloul, Andrés Felipe González Cortés, Capucine Ouellet, Abdallah Ben Mosbah Jan 2022

Réduction Des Risques Lors Des Interventions En Espace Clos : Développement D’Une Base De Connaissances Sur La Prévention Intrinsèque Et La Protection Collective, Damien Burlet-Vienney, Yuvin Chinniah, Ali Bahloul, Andrés Felipe González Cortés, Capucine Ouellet, Abdallah Ben Mosbah

Rapports de recherche scientifique

Les espaces clos parmi les plus courants dans les milieux de travail au Québec sont les réservoirs, les cuves, les puits d’accès, les égouts, les tuyaux et les citernes. Les entrées en espace clos sont effectuées, entre autres, pour des raisons de maintenance (p. ex. : réparation, inspection, nettoyage, déblocage). Les risques pour la santé et la sécurité des travailleurs impliqués sont variés : atmosphérique, chimique, biologique, mécanique, physique ou liés à une chute ou au non-respect des principes ergonomiques. Dans le cadre de ce projet, une moyenne de 2,6 décès par an en espace clos au Québec sur la …

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Recyclage Primaire Des Matières Résiduelles Électroniques Au Québec : Portrait De La Santé Et De La Sécurité Du Travail Et Appréciation Du Risque Sanitaire, Sabrina Gravel, Bouchra Bakhiyi, Joseph Zayed, Sylvie Gravel, Daniel Côté, Brigitte Roberge, Jacques Lavoie, Loïc Wingert, France Labrèche Jan 2022

Recyclage Primaire Des Matières Résiduelles Électroniques Au Québec : Portrait De La Santé Et De La Sécurité Du Travail Et Appréciation Du Risque Sanitaire, Sabrina Gravel, Bouchra Bakhiyi, Joseph Zayed, Sylvie Gravel, Daniel Côté, Brigitte Roberge, Jacques Lavoie, Loïc Wingert, France Labrèche

Rapports de recherche scientifique

En raison de l’utilisation croissante de composants et d’appareils électriques et électroniques, de même que de leur durée de vie relativement courte, la quantité de matières résiduelles électroniques ne cesse d’augmenter. Conséquemment, le nombre d’entreprises spécialisées dans le recyclage électronique (e-recyclage) est en nette croissance au Québec, comme ailleurs dans le monde. Ces entreprises emploient des travailleurs qui ont pour tâche de démonter les appareils afin d’en trier les composants qui seront subséquemment valorisés ou éliminés de manière sécuritaire. Ces tâches peuvent cependant entraîner l’exposition des travailleurs à un mélange de substances potentiellement toxiques, comprenant entre autres des poussières, des …

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Kinetic Mechanism Of Indigo-Producing Indole Monooxygenase From Acinetobacter Baumannii, Kanyarat Suksomjaisaman Jan 2022

Kinetic Mechanism Of Indigo-Producing Indole Monooxygenase From Acinetobacter Baumannii, Kanyarat Suksomjaisaman

Chulalongkorn University Theses and Dissertations (Chula ETD)

Indole, a bicyclic compound comprising a fused benzene and pyrrole ring, serves as a fundamental component in numerous natural compounds. Additionally, indole holds significant importance in industrial applications, particularly in the production of pharmaceutical drugs and agrochemicals. Flavin-dependent indole monooxygenase is an enzyme responsible for hydroxylation of the indole ring. Indole monooxygenase is a two-components: flavoprotein reductase containing FAD as a cofactor, and monooxygenase. The reductase component utilizes NADH to catalyze flavin reduction and transfers the reduced flavin to the monooxygenase component. The hydroxylation of indole by monooxygenase reduced FAD and oxygen as substrates. In this study, we cloned the …

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