با سلام خدمت کاربران در صورتی که با خطای سیستم پرداخت بانکی مواجه شدید از طریق کارت به کارت (6037997535328901 بانک ملی ناصر خنجری ) مقاله خود را دریافت کنید (تا مشکل رفع گردد).
ردیف | عنوان | نوع |
---|---|---|
1 |
Encapsulation of olive leaf phenolics within electrosprayed whey protein nanoparticles; production and characterization
محصور کردن فنل های برگ زیتون در نانوذرات پروتئین آب پنیر با الکتروپراس; تولید و توصیف-2020 Nanoencapsulation is an emerging research field in different disciplines including food, pharmaceutical, and
cosmetic industries. In this work, nanoparticles containing olive leaf extract (OLE) were prepared from whey
protein concentrate (WPC) via electrospraying and the impact of core and wall concentration on the morphology,
encapsulation efficiency, zeta potential, particle size, and polydispersity index (PDI) of capsules was studied.
Also, chemical structure and phenolic profile of final nanocarriers was analyzed by Fourier-transform infrared
spectroscopy (FTIR), and high performance liquid chromatography (HPLC), respectively. Our results showed that
spherical nanoparticles were obtained through electrospraying and their size was dependent on applied levels of
WPC and OLE. Encapsulation efficiency increased significantly (P < 0.05) at higher contents of OLE and WPC. All
produced particles had a negative zeta potential. FTIR data revealed no new spectrum in the encapsulated
samples and only a new peak (at 611.23 cm???? 1) was observed for 15% WPC particles containing 1000 ppm
phenolics. The mean size of electrosprayed WPC nanoparticles was 232.3–659.8 nm with a PDI of 0.074–0.650,
revealing a heterogeneous nanoparticle population. By increasing WPC (from 15% to 30%), smaller particles
were observed with higher encapsulation efficiencies. Also, increasing the OLE (from 500 to 1000 ppm) resulted
in bigger particles. HPLC analysis showed that nanocarriers of 15% WPC loaded with 500 ppm phenolics had the
highest content of oleuropein (138 mg/kg), tyrosol (42 mg/kg) and caffeic acid (36 mg/kg); but the highest level
of hydroxytyrosol (94 mg/kg) was found in particles with a composition of 15% WPC and 1000 ppm phenolics. Keywords: Electrospraying | Nanoencapsulation | Phenolic compounds | Whey proteins | Nanocarriers |
مقاله انگلیسی |
2 |
Review on performance assessment of phase change materials in buildings for thermal management through passive approach
مروری بر ارزیابی عملکرد مواد تغییر فاز در ساختمانها برای مدیریت حرارتی از طریق رویکرد غیرفعال-2020 Latent heat energy storage (LHES) systems using phase change materials (PCMs) are well known for its
excellent thermal energy storage and release during melting and solidifications respectively. PCMs can
be efficiently deployed in applications where significant temperature difference exists in the system
for intermittent thermal energy storage. Several research contributions has been made on integrating
PCMs in buildings for thermal management, as it enhances building thermal inertia, reduces maximum
heat flux, shifts peak energy demand, reduces temperature fluctuations of air, etc., owing to its isothermal
behavior and high energy storage density during phase change. Results of several research articles reveal
that incorporation of PCM in buildings could significantly improve indoor comfort conditions and reduce
energy demand of Heating ventilation and air conditioning (HVAC) systems, provided appropriate PCM
selection, encapsulation methods, location deployed etc. This review paper is devoted to elucidate various
facts attributing PCM integration in buildings for thermal management through passive approach.
The facts includes performance of PCMs in buildings in terms of heat gain reduction, temperature attenuation,
peak energy demand shifting and energy saving potential, encapsulation deployed, are discussed
and presented in order to expedite the interpretation for future researchers, who took their research work
in the field of building thermal energy management. Keywords: Phase change material | Passive approach | Thermal energy management | PCM Encapsulation | Buildings |
مقاله انگلیسی |
3 |
Shape-stable thermo-responsive nano Fe3O4/fatty acids/PET composite phase-change material for thermal energy management and saving applications
شکل دهی به پایدار نانو Fe3O4 با پاسخگویی حرارتی / اسیدهای چرب / مواد تغییر فاز کامپوزیت PET برای مدیریت انرژی حرارتی و صرفه جویی در برنامه های کاربردی-2020 Organic phase change materials are sensitive to temperature calling thermo-responsive materials having ability
of thermal energy storage/release in a warm/cold medium through latent heat, indicating proper potential for
better thermal energy management. Nonetheless, leakage during melting and undesirable thermal conductivity
are considered as two major disadvantages. Herein, for the first time, a simple one-step route is suggested for
preparing novel shape-stable nano Fe3O4/fatty acids/PET composite can be utilized in thermal energy saving
and management applications. This is based on simultaneous embedment of fatty acids as phase change materials
into polyester (PET) fibers as supporting material and formation of iron oxide nanoparticles. The present
approach not only obviates two stated drawbacks but also it is free from separately forming or providing nanoparticles
and utilizing micro/nano encapsulation or electrospinning which may contain toxic chemicals. It is
further conducted in one-single step preferring in the view of both economic and environmental aspects. The
composites indicated promising phase temperature intervals of 36.3–54.1 and 26.9–35.5 °C for melting and
freezing with latent heats of 40.3–59.7 and 40.1–58.2 J/g, respectively. The embedment of iron oxide nanoparticles
resulted in thermal conductivity elevation around 44.5–85.8%. The prepared samples displayed good thermal endurance and reliability after 100 thermal treatments. They also had no leakage even after 120 min at
75 °C revealed their appropriate leakage-proof property in real usages. Overall, the paper introduces an affordable
one-step mode for fabricating shape-stable nano-enhanced composite with proper thermal features for
practical thermal energy management and saving applications. Keywords: Phase change materials | Thermal conductivity | Thermal management and storage | Fatty acid | Iron oxide nanoparticles |
مقاله انگلیسی |
4 |
Combined heat and power system intelligent economic dispatch: A deep reinforcement learning approach
توزیع اقتصادی سیستم گرمایشی و هوشمند: یک رویکرد یادگیری تقویتی عمیق-2020 This paper proposed a Deep Reinforcement learning (DRL) approach for Combined Heat and Power (CHP)
system economic dispatch which obtain adaptability for different operating scenarios and significantly decrease
the computational complexity without affecting accuracy. In the respect of problem description, a vast of
Combined Heat and Power (CHP) economic dispatch problems are modeled as a high-dimensional and nonsmooth
objective function with a large number of non-linear constraints for which powerful optimization algorithms
and considerable time are required to solve it. In order to reduce the solution time, most engineering
applications choose to linearize the optimization target and devices model. To avoid complicated linearization
process, this paper models CHP economic dispatch problems as Markov Decision Process (MDP) that making the
model highly encapsulated to preserve the input and output characteristics of various devices. Furthermore, we
improve an advanced deep reinforcement learning algorithm: distributed proximal policy optimization (DPPO),
to make it applicable to CHP economic dispatch problem. Based on this algorithm, the agent will be trained to
explore optimal dispatch strategies for different operation scenarios and respond to system emergencies efficiently.
In the utility phase, the trained agent will generate optimal control strategy in real time based on current
system state. Compared with existing optimization methods, advantages of DRL methods are mainly reflected in
the following three aspects: 1) Adaptability: under the premise of the same network topology, the trained agent
can handle the economic scheduling problem in various operating scenarios without recalculation. 2) High
encapsulation: The user only needs to input the operating state to get the control strategy, while the optimization
algorithm needs to re-write the constraints and other formulas for different situations. 3) Time scale flexibility: It
can be applied to both the day-ahead optimized scheduling and the real-time control. The proposed method is
applied to two test system with different characteristics. The results demonstrate that the DRL method could
handle with varieties of operating situations while get better optimization performance than most of other
algorithms. Keywords: Combined heat and power economic dispatch | Deep reinforcement learning | Proximal policy optimization |
مقاله انگلیسی |
5 |
ساختار یک قفس پروتئینی باکتریایی قوی و کاربرد آن بهعنوان یک پلت فرم بیوکاتالیستی همهکاره از طریق کپسوله سازی آنزیم
سال انتشار: 2020 - تعداد صفحات فایل pdf انگلیسی: 6 - تعداد صفحات فایل doc فارسی: 17 با استفاده از یک انکاپسولین تازه کشفشده از Mycolicibacterium hassiacum ، چندین بیوکاتالیست در این قفس پروتئینی قوی بستهبندی شدند. مشخص شد که تولید انکاپسولین بهعنوان پروتئین نوترکیب آسان است. با روشن شدن ساختار کریستالی آن مشخص شد که این یک قفس پروتئینی کروی 60 پروترومری (قطر 23 نانومتر) با منافذ باریک است. با ایجاد یک روش بیان همزمان و جداسازی مؤثر، میتوان اثر بستهبندی انواع بیوکاتالیست ها را ارزیابی کرد. نشان داده شد که نتایج کپسول سازی در ثبات بسیار بالاتری از بیوکاتالیست ها وجود دارد. بیشتر بیوکاتالیست¬های حاوی کوفاکتورهای هدفدار در انکاپسولین فعال باقی ماندهاند. به دلیل محدود بودن قطرهای منافذ انکاپسولین (9-5 آنگستروم)، قفس پروتئین از آنزیمهای کپسوله شده در برابر ترکیبات حجیم محافظت میکند. این کار تحقیقاتی نشان میدهد که انکاپسولین¬ها ممکن است ابزار ارزشمندی برای تنظیم خواص بیوکاتالیست ها مانند ثبات و ویژگی بستر باشد.
کلیدواژهها: کپسوله سازی | ساختار کریستالی | پایداری آنزیم | تجزیهوتحلیل زیستی | کوفاکتور |
مقاله ترجمه شده |
6 |
Immune recognition, antimicrobial and opsonic activities mediated by a sialic acid binding lectin from Ruditapes philippinarum
تشخیص ایمنی ، فعالیت ضد میکروبی و اپسونیک به واسطه یک لکتین اتصال اسید سیالیک از Ruditapes philippinarum-2019 In the present study, a sialic acid-binding lectin was identified and characterized from Manila clam Ruditapes
philippinarum (designed as RpSABL-1). Multiple alignments strongly suggested that RpSABL-1 was a new member
of the sialic acid-binding lectin family. In non-stimulated clams, RpSABL-1 transcripts were constitutively expressed
in all five tested tissues, especially in hepatopancreas. After Vibrio anguillarum challenge, the expression
of RpSABL-1 mRNA was significantly up-regulated at 6 h (P < 0.05), 12 h (P < 0.01) and 24 h (P < 0.01).
Recombinant RpSABL-1 protein (rRpSABL-1) displayed apparent binding activities towards lipopolysaccharides
(LPS) and peptidoglycan (PGN), but not to glucan or chitin in vitro. Coinciding with the PAMPs binding assay,
rRpSABL-1 exhibited obvious agglutination activities against Gram-positive bacterium Staphyloccocus aureus,
Gram-negative bacteria Escherichia coli, V. anguillarum and Vibrio harveyi. Meanwhile, rRpSABL-1 showed antibacterial
activities against E. coli, and biofilm formation of E. coli could also be inhibited after incubated with
rRpSABL-1. Moreover, the encapsulation, phagocytosis and chemotactic ability of hemocytes could be enhanced
by rRpSABL-1. All these results suggested that RpSABL-1 could function as a pattern recognition receptor with
versatile functions in the innate immune responses of R. philippinarum. Keywords: Ruditapes philippinarum | Sialic acid-binding lectin | Pattern recognition receptor | Immune recognition |
مقاله انگلیسی |
7 |
A sialic acid-binding lectin with bactericidal and opsonic activities from Ruditapes philippinarum
لکتین با اسید سیالیک با فعالیتهای ضد باکتری و اپسونیک از Ruditapes Philippinarum-2019 In the present study, a sialic acid-binding lectin was cloned and characterized from Manila clam Ruditapes
philippinarum (designed as RpSabl). The open reading frame of RpSabl encoded a polypeptide of 162 amino acids
with a calculated molecular mass of 17.7 kDa. Analysis of the conserved domain suggested that RpSabl was a
new member of the sialic acid-binding lectins family. In non-stimulated clams, RpSabl transcripts were constitutively
expressed in all five tested tissues, especially in hepatopancreas. After Vibrio anguillarum challenge,
the expression of RpSabl mRNA in hepatopancreas was significantly up-regulated at 3 h (3.8-fold, P < 0.05), 6 h
(4.9-fold, P < 0.05), 12 h (12.3-fold, P < 0.01) and 24 h (9.7-fold, P < 0.01), while RpSabl transcripts in
hemocytes was only significantly up-regulated at 6 h (8.5-Fold, P < 0.01). RNAi-mediated knockdown of
RpSabl transcripts affected the survival rates of Manila clam against V. anguillarum, perhaps mainly due to the
inhibited expression of antibacterial effectors (e.g. lysozyme and defensin). Moreover, recombinant protein of
RpSabl (rRpSabl) possessed binding activities towards lipopolysaccharides (LPS), peptidoglycan (PGN) and
glucan in vitro. Coinciding with the Pathogen-associated molecular patterns (PAMPs) binding assay, rRpSabl
displayed broad bacterial-agglutination properties towards Vibrio harveyi, Vibrio splendidus, V. anguillarum,
Enterobacter cloacae and Aeromonas hydrophila. Meanwhile, the phagocytosis and encapsulation ability of hemocytes
could be significantly enhanced by rRpSabl incubation. All these results showed that RpSabl could
function as a versatile molecule involved in the innate immune responses of R. philippinarum. Keywords: Ruditapes philippinarum | Sialic acid-binding lectin | Pattern recognition receptor | Immune recognition |
مقاله انگلیسی |
8 |
Practical considerations for the encapsulation of multi-enzyme cargos within the bacterial microcompartment for metabolic engineering
ملاحظات عملی برای کپسوله سازی محموله چند آنزیمی در microcompartment باکتریایی برای مهندسی متابولیک-2017 Subcellular organization, the sequestration of enzymes and
metabolites within a synthetic organelle, is an important
emerging technology for the optimization of microbial hosts for
industrial applications. The bacterial microcompartment (MCP)
performs this sequestration function to enhance various native
metabolic processes. The defining feature of the MCP is a
protein shell surrounding a series of enzymes. To apply the
MCP for metabolic engineering, efforts in the field are directed
towards localizing enzymes within the MCP. There have been
recent advances in the understanding of protein interactions
involved in MCP assembly, the application of encapsulation
mediating peptides to model cargos, and control over loading
of such cargos. With these techniques, it is possible to
encapsulate multi-enzyme cascades.
|
مقاله انگلیسی |
9 |
توانایی نیکوتین در قرار دادن پیوگلیتازون در داخل نانولوله کربنی : بررسی با کمک دینامیک مولکولی وتئوری تابع چگالی
سال انتشار: 2016 - تعداد صفحات فایل pdf انگلیسی: 42 - تعداد صفحات فایل doc فارسی: 28 |
مقاله ترجمه شده |
10 |
خواص ساختاری، انرژی و الکترونی از احاطه کردن داروی پنسیل امین بر روی نانولوله کربنی بر مبنی چشم اندازی از vdW-DF
سال انتشار: 2015 - تعداد صفحات فایل pdf انگلیسی: 8 - تعداد صفحات فایل doc فارسی: 18 اصل اول محاسبات تابع دانسیته واندروالس vdW-DF با استفاده از تابع GGA/PBE و تابع پایه DZP در بسته های SIESTA برای بررسی احاطه کردن داروی پنسیل امین بر روی نانولوله کربنی تک دیواره صندلی و زیگزاکی اجرا می شود. نتایج بدست امده نشان می دهد که اتصال دارو در اطراف نانولوله کربنی تک دیواره زیگزاکی SWCNT در مقایسه همراه با همتای صندلی خودش معروف تر است. ادرس در اینجا نقشی از برهمکنش vdW برای داروی پنسیل امین در زمان گنجاندن دارو در نانولوله کربنی است. لازم به ذکر است که احاطه کردن از نیروی vdW می تواند در خواص پیوندی موثر باشد. ساختار الکترونی و جمعیت بار مولیکن برای بررسی انرژی بیشتر کمپلکس های معروف انالیز می شود که نشان داده می شود که احاطه کردن پنسیل امین تغییرات ارامی در خواص الکترونیک از SWCNT دارد و بدیهی است انتقالات برای دارو با نانولوله در طی فرایند احاطه سازی بهتر است. توصیف مقدار فعالیت جهانی مانند الکترونگاتیویته X، سختی جهانی ، نرمی جهانی S، پتانسیل الکترو شیمیایی و شاخص الکترون خواهی محاسبه می شود. پیش بینی شده است که این یافته ها راه جدید و مقداری اطلاعات برای کمک در مطالعات ازمایشگاهی و کاربردهای اینده ایجاد می کند. |
مقاله ترجمه شده |