بزرگمهر پارسه

ایران، کشوری وسیع با تنوع زمین‌شناختی و جغرافیایی فراوان، در دل خود رشته کوه‌های باشکوه و تأثیرگذاری را جای داده است که نه تنها بر منظر طبیعی آن حکمرانی می‌کنند، بلکه بر سبک زندگی، فرهنگ، و اقتصاد مردمانش نیز اثرگذار هستند. در نقشه جغرافیایی ایران، این رشته کوه‌ها به وضوح قابل مشاهده‌اند و نقش مهمی در شکل‌گیری اقلیم‌های مختلف در این کشور دارند.

رشته کوه البرز

البرز، که از نواحی شمال غربی تا شمال شرقی ایران کشیده شده، مرز طبیعی بین دریای خزر و فلات مرکزی ایران را تشکیل می‌دهد. این رشته کوه نه تنها به خاطر ارتفاعات بلندش، بلکه به دلیل تأثیرش بر اقلیم منطقه شناخته شده است. قله دماوند که بلندترین قله ایران و خاورمیانه است، در این رشته کوه قرار دارد و با ارتفاع ۵۶۱۰ متر، نمادی از افتخار ملی به شمار می‌رود. البرز مکانی است برای تنوع زیستی فراوان و دارای جنگل‌های انبوه و متراکمی است که در مناطق پایین‌دست خود میزبان تعداد زیادی از گونه‌های گیاهی و جانوری مختلف است.

رشته کوه زاگرس

زاگرس، که از شمال غربی تا جنوب شرقی ایران امتداد یافته، دیگر رشته کوه عظیم و مهم ایران است. این رشته کوه، که بخش عمده‌ای از غرب و جنوب غربی کشور را دربرمی‌گیرد، برای داشتن منابع طبیعی نظیر نفت و گاز بسیار مهم است. زاگرس به دلیل داشتن جنگل‌ها و مراتع وسیع، محلی مناسب برای دامداری و کشاورزی است. این رشته کوه همچنین به خاطر غنی بودن از تنوع گیاهی و جانوری معروف است و می‌توان گفت که یکی از مهم‌ترین عوامل شکل‌گیری تمدن‌های کهن در این ناحیه بوده است.

رشته کوه تخت سلیمان

رشته کوه تخت سلیمان، که در شمال شرقی ایران واقع شده، به دلیل داشتن مناظر طبیعی خیره‌کننده و اهمیت تاریخی و فرهنگی فراوان، مورد توجه قرار دارد. این منطقه که شامل چشمه‌های آب گرم و معدنی است، نقش مهمی در تاریخ ایران داشته و به عنوان مکانی برای پرستش و زیارت در دوران باستان شناخته می‌شده است.

رشته کوه هزار مسجد

رشته کوه هزار مسجد که در شمال شرقی کشور قرار گرفته، به دلیل وجود تپه‌ها و کوه‌پایه‌های پوشیده از جنگل، منطقه‌ای مهم برای حفاظت از حیات وحش و گونه‌های مختلف گیاهی است. این منطقه به عنوان یکی از زیباترین و دست‌نخورده‌ترین نقاط جغرافیایی ایران شناخته شده و برای پژوهشگران طبیعت و علاقه‌مندان به کوه‌نوردی جذاب است.

جمع‌بندی

رشته کوه‌های ایران نه تنها به خاطر زیبایی‌های طبیعی‌شان شهره هستند، بلکه به دلیل تأثیرات عمیقی که بر جغرافیا، اقلیم، فرهنگ و اقتصاد ایران دارند، از اهمیت ویژه‌ای برخوردارند. این کوه‌ها، که در نقشه جغرافیایی ایران به وضوح نمایان هستند، از جمله میراث‌های طبیعی این کشور محسوب می‌شوند که نقش مهمی در شکل‌گیری و توسعه تاریخی و مدرن ایران داشته‌اند.

 

In the ever-evolving landscape of entrepreneurship, the ability to carve one's path is a defining characteristic of successful business leaders. This process, often referred to as "Path Creation," is integral to the ethos of innovative entrepreneurship. In this blog post, we'll explore the concept of path creation and how it plays a vital role in shaping the trajectory of visionary entrepreneurs.

Defining Path Creation:

Path creation involves the deliberate act of breaking away from conventional norms and forging a unique, uncharted course. Instead of following established paths, entrepreneurs who embrace path creation actively seek to create new opportunities and paradigms. It is about envisioning possibilities beyond the existing boundaries and having the courage to explore unexplored territories.

The Essence of Innovative Entrepreneurship:

1. Thinking Beyond Boundaries: Innovative entrepreneurship is synonymous with thinking beyond the traditional boundaries of business. Entrepreneurs who engage in path creation are not content with the status quo; they challenge existing norms and explore untapped markets, envisioning opportunities that others may overlook.

2. Embracing Risk and Uncertainty: Path creation is not for the faint of heart. It involves navigating uncharted waters, embracing risk, and thriving in uncertainty. Innovative entrepreneurs understand that the journey to success often involves stepping into the unknown, and they view challenges as opportunities for growth rather than obstacles.

3. Creating Market Niches: Instead of entering crowded markets, entrepreneurs practicing path creation identify and create their niches. This involves understanding unique customer needs, anticipating future trends, and offering products or services that fill gaps in the market. By doing so, they not only differentiate themselves but also become trendsetters.

4. Building a Culture of Innovation: Path creation is not confined to products or services; it extends to organizational culture. Successful entrepreneurs foster a culture of innovation within their teams, encouraging employees to think creatively, challenge assumptions, and contribute ideas that can shape the company's path forward.

How Path Creation Fuels Innovative Entrepreneurship:

1. Disruption as a Catalyst: Path creation often leads to disruptive innovations. By challenging established norms, entrepreneurs create opportunities for revolutionary changes in industries. This disruption can give rise to groundbreaking products, services, and business models that redefine market dynamics.

2. Adaptability in a Dynamic Environment: The entrepreneurial journey is rife with unforeseen challenges. Entrepreneurs who engage in path creation develop a mindset of adaptability, enabling them to pivot and adjust their strategies in response to changing market conditions. This adaptability is a key driver of long-term success.

3. Inspiring Others to Follow: Path creation has a ripple effect, inspiring others to break free from conventional thinking. Innovative entrepreneurs become trailblazers, setting a precedent for others to follow suit. This not only fosters a culture of innovation within industries but also contributes to the overall advancement of business ecosystems.

Conclusion

In the realm of innovative entrepreneurship, path creation is the compass that guides visionaries towards unexplored frontiers. It is about embracing uncertainty, challenging norms, and creating opportunities where none existed before. Aspiring entrepreneurs should recognize the power of path creation as a transformative force that not only shapes their ventures but also influences the broader landscape of business and innovation. By boldly forging new paths, entrepreneurs become the architects of their success and the architects of a future where innovation knows no bounds.

In the realm of architectural design, innovation knows no bounds. The convergence of technology and creativity has given rise to novel concepts, and one such cutting-edge marvel is the Aggregation Tensile Structure. Powered by computational design tools like Grasshopper, this architectural approach redefines the relationship between form, function, and aesthetics.

Aggregation Tensile Structures are a groundbreaking concept that draws inspiration from natural processes, such as cell growth and aggregation patterns. These structures are characterized by their intricate network of interconnected components, resembling a woven fabric of architectural elements. Unlike traditional rigid structures, aggregation tensile structures derive their strength and stability from tension forces, allowing for strikingly unique and fluid forms that challenge conventional design norms.

At the heart of bringing these awe-inspiring structures to life lies Grasshopper, a visual programming language and environment within Rhinoceros 3D. Grasshopper empowers architects, engineers, and designers to create, manipulate, and optimize complex geometries with remarkable precision and efficiency. Its algorithmic approach aligns perfectly with the intricate calculations required for designing aggregation tensile structures.

The process begins by defining the base geometry and the underlying parameters within Grasshopper. By leveraging parametric modeling, designers can experiment with a myriad of variables, such as component size, connection points, and tension distribution. The software then utilizes computational algorithms to simulate the behavior of the structure under different conditions, ensuring its structural integrity and performance.

One of the most fascinating aspects of Aggregation Tensile Structures is their adaptability to various contexts. Whether envisioning large-scale pavilions, futuristic building facades, or avant-garde installations, these structures can be tailored to meet specific design objectives while harmonizing with their surroundings.

As technology continues to evolve, the boundaries of architectural innovation expand exponentially. Aggregation Tensile Structures represent a fusion of nature-inspired design, computational prowess, and engineering excellence. With Grasshopper as the driving force, architects can delve into the realm of limitless possibilities, shaping the skylines of the future with structures that captivate the eye and challenge the mind.

In conclusion, Aggregation Tensile Structures exemplify the power of computational design tools like Grasshopper to transform architectural visions into reality. This revolutionary approach marries the elegance of natural forms with the precision of digital design, pushing the boundaries of what's achievable in architecture. As we gaze toward a horizon where buildings become living art, aggregation tensile structures stand at the forefront of this exciting architectural evolution.

In the ever-evolving landscape of SEO, staying abreast of Google's algorithm changes is crucial for maintaining and enhancing a website's visibility. One such algorithm that has been a cornerstone of Google's ranking system is PageRank. In this comprehensive guide, we'll delve into how changes in Google's algorithms, especially updates to PageRank, impact the way external links are evaluated for SEO purposes.

Understanding the PageRank Algorithm

Before we dive into the impact of algorithm changes, let's first grasp the fundamentals of the PageRank algorithm. Developed by Google's co-founders Larry Page and Sergey Brin, PageRank was introduced as a way to measure the importance of webpages based on the quantity and quality of links pointing to them.

1. Original PageRank Model

In its original form, PageRank worked on the principle that a link from one page to another was akin to a vote of confidence. Not all votes were equal, though; the importance of a vote depended on the PageRank of the linking page. The higher the PageRank of the linking page, the more valuable the vote.

2. Evolving Beyond Quantity to Quality

Over time, Google has refined its approach. While the quantity of links remains a factor, the emphasis has shifted towards the quality and relevance of links. Google aims to reward pages that are not only linked to widely but also linked to by authoritative and contextually relevant sources.

Impact of Algorithm Changes on External Link Evaluation

As Google continues to refine its algorithms, particularly PageRank, the way external links are evaluated for SEO purposes undergoes significant changes. Let's explore these impacts in detail.

1. Emphasis on Content Relevance

Recent updates to the PageRank algorithm have placed a greater emphasis on content relevance. Links from pages that are thematically aligned with the linked-to content now carry more weight. This shift reflects Google's commitment to delivering highly relevant results to users.

2. Contextual Signals from Linking Pages

Algorithm changes have led to a deeper analysis of contextual signals from linking pages. It's not just about the link itself; Google assesses the overall content, context, and user experience of the linking page to determine the relevance and authority it contributes to the linked content.

3. Diversity in Link Profiles

While quantity still matters, the emphasis has shifted towards a diverse and natural link profile. Websites with an assortment of high-quality links from various authoritative sources within their industry are now favored. This diversity ensures a well-rounded and comprehensive link portfolio.

4. Importance of Trustworthiness and Authority

Trustworthiness and authority have become paramount in link evaluation. Google's algorithms now weigh links from trusted, authoritative sources more heavily. Links from government sites, educational institutions, and established industry authorities are considered highly valuable.

5. User Experience Signals

Algorithm updates have integrated user experience signals into the evaluation of external links. This includes factors such as bounce rate, time on page, and overall engagement. Links that contribute to a positive user experience are rewarded, while those leading to irrelevant or low-quality content may be penalized.

6. Social Signals and Brand Authority

The integration of social signals and brand authority into link evaluation is a notable shift. Google recognizes the impact of social media shares and brand mentions as indicators of a page's popularity and relevance. Strong brand signals can enhance the authority of external links.

Strategies to Navigate Algorithm Changes in External Linking SEO

Given the evolving nature of Google's algorithms, SEO practitioners must adapt their strategies to navigate these changes effectively. Here are strategies to ensure your external link building remains resilient in the face of algorithmic updates:

1. Focus on Content Quality and Relevance

Place a premium on creating high-quality, relevant content that naturally attracts links. Content should address user intent, provide value, and align with the thematic focus of your website.

2. Build Relationships with Niche Authorities

Strategic relationship-building with authoritative figures and websites within your industry pays dividends. Links from respected sources carry more weight, signaling to Google that your content is a valuable resource within its niche.

3. Implement Contextual Linking Strategies

Instead of pursuing links for the sake of quantity, prioritize contextual linking. Seek opportunities to naturally integrate links within the content where they enhance the user's understanding and experience.

4. Monitor and Adapt to Algorithm Updates

Stay informed about algorithm updates and adjust your strategy accordingly. Regularly monitor industry publications, Google announcements, and SEO forums to stay ahead of changes that may impact link evaluation.

5. Diversify Your Link Portfolio

Aim for a diverse link portfolio that includes a mix of dofollow and nofollow links from various authoritative sources. This diversity not only aligns with Google's preferences but also mitigates risks associated with relying on a single source or type of link.

6. Leverage Social Media and Branding

Integrate social media into your link-building strategy. Actively promote your content on social platforms, engage with your audience, and cultivate a strong brand presence. Social signals contribute to the overall authority of your content.

7. Regularly Audit Your Link Profile

Conduct regular link audits to identify and address any potentially harmful or irrelevant links. Tools like Google Search Console, Ahrefs, and SEMrush can provide insights into the health of your link profile.

8. Prioritize User Experience

Ensure that your website provides a positive user experience. Pages linked to should load quickly, offer valuable content, and encourage user engagement. Positive user signals contribute to the perceived authority of your content.

9. Stay Ethical in Your Practices

Adhere to ethical and white-hat SEO practices. Avoid engaging in manipulative tactics, such as buying links or participating in link schemes, as these can lead to penalties and long-term damage to your website's reputation.

10. Continuously Adapt and Learn

SEO is a dynamic field, and adaptability is key to success. Stay curious, continuously learn about changes in the SEO landscape, and be willing to adjust your strategies based on evolving best practices.

Conclusion: Navigating the Seas of SEO Evolution

As Google's algorithms continue to evolve, so too must our approach to external link building. The days of relying solely on the quantity of links are behind us. Today, it's about the quality, relevance, and context of those links.

By understanding the impact of algorithm changes on external link evaluation and implementing strategic, user-focused, and ethical practices, SEO practitioners can navigate the seas of SEO evolution with confidence. In a landscape where change is constant, adaptability and a commitment to delivering value to users will remain the guiding principles for sustainable SEO success.

Hey game developers and digital dreamweavers! ???? Ready to take your Unity project to the next level without burning a hole in your pocket? Look no further! Today, we're diving into the Unity Asset Free world again, but this time, let's pick out some shining stars that can add that extra oomph to your game.

1. Fantasy Environment Pack:

Ever dreamed of creating a mystical fantasy world for your game? Well, dreams do come true with the Fantasy Environment Pack. This Unity Asset Free gem comes loaded with enchanting landscapes, magical flora, and ethereal lighting effects. Transform your game into a realm of wonder and adventure with just a few clicks.

2. Unity Particle Pack:

Spice up your game's visuals with the Unity Particle Pack. From vibrant explosions to mesmerizing particle effects, this asset pack is a game-changer (pun intended). Whether you're working on a space odyssey or a fantasy epic, these particles will add that wow factor, making your game visually stunning.

3. Standard Assets (Characters):

Need some cool characters to populate your game world? Look no further than Unity's own Standard Assets – Characters package. With a variety of ready-to-use character controllers, animations, and models, you can populate your game with diverse and dynamic characters without spending a dime.

4. Post Processing Stack:

Want to give your game a professional, polished look? The Post Processing Stack is here to save the day. This Unity Asset Free package allows you to add effects like bloom, depth of field, and color grading, giving your game that cinematic feel. It's like having your own post-production studio right in Unity.

5. Cinemachine:

Lights, camera, action! Cinemachine is a Unity Asset Free marvel that empowers you with robust camera systems. Create dynamic and cinematic camera sequences with ease. Whether you're aiming for a classic RPG feel or an action-packed thriller, Cinemachine will be your director's chair.

Tips for Maximizing Unity Asset Free:

• Stay Updated: Unity Asset Free offerings change and grow over time. Make it a habit to check the Asset Store regularly for new additions.

• Explore Community Forums: Connect with fellow developers to discover hidden gems and get tips on how to use assets effectively. The Unity community is a goldmine of knowledge and support.

• Give Credit: If you're using assets created by others, it's always a good practice to check the licensing agreements and give credit where it's due. It's a win-win for everyone.

So, there you have it – five Unity Asset Free treasures waiting to be unearthed. Dive in, experiment, and let your creativity run wild. With these assets in your arsenal, your Unity game is bound for greatness. Happy developing! ????

Head and neck cancer is one of the most common cancers worldwide (fifth leading incidence). Radiotherapy and cetuximab are considered the standard treatment. However, locoregional defects are a significant challenge in improving and controlling the condition and occur in forty percent of the patients within the first two years of the treatment.

Recently, several radiomic studies have been proposed to better identify patients in a non-invasive manner by using available images such as those obtained for diagnosis and planning treatment. These studies are based on positron emission tomography (PET) and computed tomography (CT) imaging.

HECKTOR was created in 2020 to provide an opportunity to compare automated algorithms dedicated to tumor segmentation in FDG PET/CT multidimensional images.

The HECKTOR Challenge is an excellent opportunity for professionals working on three-dimensional segmentation algorithms to present GTV tumor segmentation approaches in PET/CT scans, focusing on oral and pharyngeal cancers.

The 1st edition of the HECKTOR challenge was performed using a data set of 254 patients from 5 centers and attracted about 20 people to participate. In 2021, Hector’s challenge was repeated with a larger data set (325 patients from 6 centers) with the addition of a second task. The 2nd edition of the HECKTOR challenge was successfully held with twice the number of participants, 40 for the first task and 30 participants for the second task.

Following the success of the first two HECKTOR Challenges in 2020 and 2021, this challenge will again be held at the 25th International Conference on Medical Image Computing and Intervention (MICCAI) 2022.

This challenge version also includes fully automatic lymph node diagnosis and segmentation in addition to the primary tumor. The data set is expected to have more than a thousand patients collected from 9 different centers.

قبل از هر كاري، بهتر از ان را روي خاك تست كنيد زيرا نيترات كلسيم بيش از اندازه هم مي‌تواند باعث بروز مشكلات مختلفي شود.

براي جلوگيري از فساد ميوه‌ها، مي‌توانيد قبل از كاشتن، يك لايه از ان را روي خاك بپاشيد.

بعد از رشد گياهان و قبل از ميوه دادن، دوباره از آن استفاده كنيد. در اين زمان بهتر است از محلول رقيق‌تر ان استفاده كنيد. اين كار باعث مي‌شود كه سلول‌هاي گياهان در برابر فساد و ايجاد مشكلاتي چون گند زدن شكوفه جلوگيري كند.

بسياري از باغچه‌بان‌ها گياهاني كه به ميزان كلسيم حساس هستند را بيشتر از گياهان ديگر در معرض نيترات كلسيم قرار مي‌دهند. بعد از رشد هم بسته به نياز، مي‌توانيد يك يا دوبار ديگر هم از ان استفاده كنيد.

به طور كلي، بايد ميزان متعادل براي هر گياه را پيدا كنيد.

گياهاني مانند سيب، گوجه و فلفل از جمله گياهاني هستند كه نيترات كلسيم مي‌تواند به رشد آن‌ها كمك كند.

نيترات كلسيم و آب را با چه نسبتي تركيب كنيم؟

به ازاي هر ليتر، بهتر است فقط يك قاشق غذاخوري نيترات كلسيم استفاده كنيد و تا زماني كه به طور كامل حل شود، آن را هم بزنيد.

بهترين شكل استفاده از نيترات كلسيم، به شكل اسپري است زيرا سريع‌تر جذب گياه شده و از بروز مشكلات جلوگيري مي‌كند.

در تركيب با سولفات منيزيم مي‌تواند كمبود منيزيم را هم رفع كند. براي اين كار بايد اين دو محلول را با نسبت ۱.۵ تا ۲ كيلوگرم به ۹۵ ليتر تركيب كرد.

به عنوان مكمل، از ۱.۶ كيلوگرم در هر ۳۰.۵ متر استفاده كنيد. كود را با خاك مخلوط كنيد، مراقب باشيد كه محلول را به شاخ و برگ نپاشيد.

منطقه‌اي مي خواهيد كلسيم نيترات به ان اضافه كنيد را به خوبي آبياري كرده تا مواد مغذي شروع به نفوذ به خاك كنند و به ريشه گياه برسند.

براي يك محلول پاشي براي رفع كمبود كلسيم و افزودن نيتروژن، ۱ فنجان نيترات كلسيم را به ۹۴.۵ ليتر اضافه كنيد. زماني كه آفتاب كم است و گياهان به اندازه كافي آبياري شده‌اند، محلول را روي خاك اسپري كنيد.

هورمون هاي گياهي در حقيقت مواد آلي هستند كه در يك سري از بافت‌هاي گياه ساخته شده و در ديگر بافت‌هاي آن مورد استفاده قرار مي‌گيرند. اين هورمون‌ها به‌عنوان مواد غذايي براي گياه شناخته نمي‌شوند، بلكه برخي از فرايندهاي گياهي را تنظيم مي‌كنند. به‌عبارت‌ديگر، هورمون هاي گياهي كه فيتوهورمون نيز نام دارند، درون بافت‌هاي گياهي از جمله بافت مريستمي ساخته مي‌شوند و سپس به بافت هدف مي‌روند و فرآيند خاصي را تنظيم مي‌كنند. اكنون شايد اين سؤال براي شما مطرح شود كه آيا هورمون‌ها تنها درون گياه ساخته مي‌شوند؟

در واقع هورمون‌ها هم به‌صورت طبيعي درون گياه و هم به‌صورت شيميايي ساخته مي‌شوند و روي گياه مورد استفاده قرار مي‌گيرند. پيش از هر چيز، بهتر است كه به معرفي هورمون هاي گياهي و كاربرد آن‌ها بپردازيم.

هورمون اكسين

قسمت‌هايي از گياه كه فرايندهاي رشد گياه در آنجا بيشتر است، هورمون اكسين بيشتري توليد مي‌كنند. به‌عبارت‌ديگر، ميزان توليد اكسين در مريستم‌هاي نوك ساقه، نوك ريشه و كامبيوم‌ها بسيار زياد است. اندول استيك، يكي از فراوان‌ترين اكسين‌هايي است كه به‌صورت طبيعي ساخته مي‌شود.

اكسين‌ها كاربردهاي زيادي دارند. براي مثال، افزايش رشد سلول‌هاي گياهي، كنترل ريزش برگ و ميوه در فصل پاييز، افزايش گلدهي گياهان روز بلند و توقف گلدهي گياهان روز كوتاه، افزايش سنتز پروتئين و غيره. اكسين‌ها با غلظت كم، به رشد ريشه گياهان كمك مي‌كند و اگر غلظت آن زياد شود، مانع از رشد ريشه خواهد شد.

هورمون جيبرلين

اين هورمون، به‌صورت طبيعي در ريشه و برگ‌هاي گياه ساخته مي‌شود. جيبرلين‌ها تمامي فرايندهاي رشد و نمو گياهان، از رويش دانه تا توليد ميوه را تحت تأثير قرار مي‌دهند. در همه بخش‌هاي گياه، هورمون جيبرلين وجود دارد ولي تجمع بيشتر آن‌ها در دانه‌هاي نارس مشاهده شده است.

اين هورمون در طويل شدن سلول‌هاي گياهي، افزايش گلدهي گياهان روز بلند و توقف گلدهي گياهان روز كوتاه نقش مهمي دارند. علاوه‌برآن، غلظت‌هاي متفاوتي از اين هورمون بر رشد ريشه گياهان تأثير دارد، باعث بزرگ‌شدن اندازه ميوه در درخت‌هاي ميوه مي‌شوند، فرايند رسيده شدن ميوه‌ها را به تأخير مي‌اندازند و رشد برگ گياهان را افزايش مي‌دهند.

هورمون هاي گياهي در حقيقت مواد آلي هستند كه در يك سري از بافت‌هاي گياه ساخته شده و در ديگر بافت‌هاي آن مورد استفاده قرار مي‌گيرند. اين هورمون‌ها به‌عنوان مواد غذايي براي گياه شناخته نمي‌شوند، بلكه برخي از فرايندهاي گياهي را تنظيم مي‌كنند. به‌عبارت‌ديگر، هورمون هاي گياهي كه فيتوهورمون نيز نام دارند، درون بافت‌هاي گياهي از جمله بافت مريستمي ساخته مي‌شوند و سپس به بافت هدف مي‌روند و فرآيند خاصي را تنظيم مي‌كنند. اكنون شايد اين سؤال براي شما مطرح شود كه آيا هورمون‌ها تنها درون گياه ساخته مي‌شوند؟

در واقع هورمون‌ها هم به‌صورت طبيعي درون گياه و هم به‌صورت شيميايي ساخته مي‌شوند و روي گياه مورد استفاده قرار مي‌گيرند. پيش از هر چيز، بهتر است كه به معرفي هورمون هاي گياهي و كاربرد آن‌ها بپردازيم.

هورمون اكسين

قسمت‌هايي از گياه كه فرايندهاي رشد گياه در آنجا بيشتر است، هورمون اكسين بيشتري توليد مي‌كنند. به‌عبارت‌ديگر، ميزان توليد اكسين در مريستم‌هاي نوك ساقه، نوك ريشه و كامبيوم‌ها بسيار زياد است. اندول استيك، يكي از فراوان‌ترين اكسين‌هايي است كه به‌صورت طبيعي ساخته مي‌شود.

اكسين‌ها كاربردهاي زيادي دارند. براي مثال، افزايش رشد سلول‌هاي گياهي، كنترل ريزش برگ و ميوه در فصل پاييز، افزايش گلدهي گياهان روز بلند و توقف گلدهي گياهان روز كوتاه، افزايش سنتز پروتئين و غيره. اكسين‌ها با غلظت كم، به رشد ريشه گياهان كمك مي‌كند و اگر غلظت آن زياد شود، مانع از رشد ريشه خواهد شد.

هورمون جيبرلين

اين هورمون، به‌صورت طبيعي در ريشه و برگ‌هاي گياه ساخته مي‌شود. جيبرلين‌ها تمامي فرايندهاي رشد و نمو گياهان، از رويش دانه تا توليد ميوه را تحت تأثير قرار مي‌دهند. در همه بخش‌هاي گياه، هورمون جيبرلين وجود دارد ولي تجمع بيشتر آن‌ها در دانه‌هاي نارس مشاهده شده است.

اين هورمون در طويل شدن سلول‌هاي گياهي، افزايش گلدهي گياهان روز بلند و توقف گلدهي گياهان روز كوتاه نقش مهمي دارند. علاوه‌برآن، غلظت‌هاي متفاوتي از اين هورمون بر رشد ريشه گياهان تأثير دارد، باعث بزرگ‌شدن اندازه ميوه در درخت‌هاي ميوه مي‌شوند، فرايند رسيده شدن ميوه‌ها را به تأخير مي‌اندازند و رشد برگ گياهان را افزايش مي‌دهند.

1. مشاوره در گزينش قطعات الكترونيكي
2. تامين قطعات الكترونيك خاص
3. دسترسي بي واسطه به توليدكنندگان اصلي و معتبر
4. خريد قطعه از كارخانه با شرط بازگشت
5. گارانتي قطعات وارداتي
6. ارائه قيمت هاي رقابتي در مقايسه با ساير تامين كنندگان
7. خريد و حمل سريع قطعات الكترونيكي به كشور در صورت نياز مشتري
8. كمترين هزينه حمل و انتقال به كشور با استفاده از روشهاي مناسب
9. تضمين كيفيت قطعات و كنترل در مبدا