LabsLand হল অনলাইন উপলভ্য বাস্তব পরীক্ষাগারগুলির একটি বিশ্বব্যাপী নেটওয়ার্ক। শিক্ষার্থীরা (স্কুল, বিশ্ববিদ্যালয় এবং আজীবন শেখার প্ল্যাটফর্মগুলিতে) তাদের ল্যাপটপ, ট্যাবলেট বা ফোন ব্যবহার করে ইন্টারনেটের মাধ্যমে প্রকৃত পরীক্ষাগারগুলিতে অ্যাক্সেস করতে পারে।

গবেষণাগারগুলি রিয়েল-টাইম (Arduino, FPGA...) হয় যা সারা বিশ্বের বিভিন্ন একাধিক বিশ্ববিদ্যালয়ে অবস্থিত। নির্দিষ্ট ক্ষেত্রে (ফজিক্স, জীববিজ্ঞান, রসায়ন) ল্যাবগুলি হল LabsLand আল্ট্রাকন্ট্রেন্ট ল্যাব, তাই বিশ্ববিদ্যালয়টি ল্যাবরেটরিতে যা করা যায় তার সম্ভাব্য সমস্ত সংমিশ্রণ (কিছু ক্ষেত্রে, কয়েক হাজার) রেকর্ড করেছে এবং এটি ইন্টারেক্টিভ উপায়ে উপলব্ধ করে।

প্রতিটি ক্ষেত্রে, পরীক্ষাগারটি সর্বদা বাস্তব (নকল করা নয়) এবং ওয়েবের মাধ্যমে উপলব্ধ (আপনার কোনও হার্ডওয়্যার পাওয়ার, শিপিংয়ের সাথে মোকাবিলা করার প্রয়োজন নেই ইত্যাদি)।

নিম্নলিখিত ভিডিওতে দেখুন কিভাবে একটি সাধারণ ব্যবহারকারীর সেশন কাজ করেঃ

Summary

This laboratory setup allows students to measure the concentration of carbon dioxide inside a sealed chamber containing seeds of similar size to each other. Students can choose between different experimental conditions: seeds previously soaked in distilled water or in an acetic acid solution at room temperature (24 ± 1)°C, or unsoaked seeds (not activated).

 

Versions of this laboratory

In this version of the laboratory, students, in a manner similar to a traditional hands-on experiment, will need to collect data from the sensor readings and draw their own plots or create their own spreadsheets to analyze and draw conclusions, as it does not include any plots nor allows students to download data.

There is an alternative version of the laboratory (Cellular Respiration with Plot) in which a plot is displayed at the end of each experiment and students can download the data onto a spreadsheet.

 

Carbon dioxide release in plant respiration

Cellular respiration is one of the vital functions carried out by all cells, through which various organic compounds are broken down and the energy needed for other processes is released.

The exchange of gases at a macroscopic level is evidence of the energy transformation processes that occur in cells. In the presence of oxygen, carbon dioxide is released as a byproduct of cellular respiration. This emission of carbon dioxide is essential for understanding the metabolism of living beings and its consequences in ecosystems.

 

Seed Activation

The imbibition or absorption of water by seeds is an essential process for activating their metabolism and for breaking dormancy, thus preparing the seed for germination. This phenomenon occurs by immersing the seeds in water or aqueous solutions for a specified period, such as soaking in distilled water or acetic acid. The duration and conditions of imbibition directly influence the metabolic activation of the seed, which is reflected in the rate of carbon dioxide release during the cellular respiration process. The metabolic rate can vary depending on the species and chosen imbibition conditions.

 

Experiments & Setup

The experimental device is equipped with a gaseous carbon dioxide sensor and a hermetic chamber. Students have the option to select from the three previously detailed seed activation experimental conditions.

In all experiments, seeds of the same species with similar sizes are used, which facilitates the comparison of results.

 

Learning Objectives

• Understand the scientific endeavor through the development of a controlled experiment and the interpretation of data related to biological processes.
• Relate the release of carbon dioxide under different experimental conditions to cellular respiration, differentiating the levels of organization of matter.
• Identify cellular respiration as an essential characteristic of living beings and understand the importance of the energy transformations it entails.

Summary

This laboratory setup allows students to measure the concentration of carbon dioxide inside a sealed chamber containing seeds of similar size to each other. Students can choose between different experimental conditions: seeds previously soaked in distilled water or in an acetic acid solution at room temperature (24 ± 1)°C, or unsoaked seeds (not activated).

 

Versions of this laboratory

This version of the laboratory displays a plot at the end of each experiment and allows students to download the data in a spreadsheet. This allows students to analyze the results without needing to gather and plot the data themselves.

An alternative version of the lab exists (Cellular Respiration) in which the plot and the data are not available. That way, in order to analyse the results and reach proper conclusions, students need to gather and plot the data themselves from the discrete sensor readings, similarly to how they would do so in a traditional hands-on lab.

 

Carbon dioxide release in plant respiration

Cellular respiration is one of the vital functions carried out by all cells, through which various organic compounds are broken down and the energy needed for other processes is released.

The exchange of gases at a macroscopic level is evidence of the energy transformation processes that occur in cells. In the presence of oxygen, carbon dioxide is released as a byproduct of cellular respiration. This emission of carbon dioxide is essential for understanding the metabolism of living beings and its consequences in ecosystems.

 

Seed Activation

The imbibition or absorption of water by seeds is an essential process for activating their metabolism and for breaking dormancy, thus preparing the seed for germination. This phenomenon occurs by immersing the seeds in water or aqueous solutions for a specified period, such as soaking in distilled water or acetic acid. The duration and conditions of imbibition directly influence the metabolic activation of the seed, which is reflected in the rate of carbon dioxide release during the cellular respiration process. The metabolic rate can vary depending on the species and chosen imbibition conditions.

 

Experiments & Setup

The experimental device is equipped with a gaseous carbon dioxide sensor and a hermetic chamber. Students have the option to select from the three previously detailed seed activation experimental conditions.

In all experiments, seeds of the same species with similar sizes are used, which facilitates the comparison of results.

 

Learning Objectives

• Understand the scientific endeavor through the development of a controlled experiment and the interpretation of data related to biological processes.
• Relate the release of carbon dioxide under different experimental conditions to cellular respiration, differentiating the levels of organization of matter.
• Identify cellular respiration as an essential characteristic of living beings and understand the importance of the energy transformations it entails.

In the Microscope Laboratory, you can explore a variety of samples using basic microscopy techniques. Learn how to operate the microscope, including adjusting focus, managing lighting, and changing lenses to control zoom levels. Observe different plant and animal tissue samples, gain hands-on experience with essential microscopy features, and deepen your understanding of how microscopes work. This version of the lab includes a preparation phase but it is optional and can be skipped.

In the Microscope Laboratory, you can explore a variety of samples using basic microscopy techniques. Learn how to operate the microscope, including adjusting focus, managing lighting, and changing lenses to control zoom levels. Observe different plant and animal tissue samples, gain hands-on experience with essential microscopy features, and deepen your understanding of how microscopes work. In this version of the Microscope lab, successfully preparing the sample is mandatory before controlling the microscope itself.

Planarians are flatworms that can be used to study the effect of different substances on the nervous system. In this remote laboratory, you can choose the solution into which to place the planarian worms. The solutions are aqueous and have different exitatory or inhibitory substances, with different concentrations, dissolved into them.

In this version of the planarians laboratory there is a manual tally counter that students can use to count the number of times the planarians cross a line (to estimate their activity level).

Planarians are flatworms that can be used to study the effect of different substances on the nervous system. In this remote laboratory, you can choose the solution into which to place the planarian worms. The solutions are aqueous and have different exitatory or inhibitory substances, with different concentrations, dissolved into them.

In this version of the planarians laboratory, the number of times the planarian worms cross the lines is counted automatically.

Planarians are flatworms that can be used to study the effect of different substances on the nervous system. In this remote laboratory, you can choose the solution into which to place the planarian worms. The solutions are aqueous and have different exitatory or inhibitory substances, with different concentrations, dissolved into them.

In this version of the laboratory, the names of the substances are not displayed. The challenge can thus be to determine which substance is which, by measuring the activity level of the planarians in each unknown substance.

Through this remote laboratory you can control the samples under observation of a microscope. The available samples allow to analyze 6 different samples of leaves, comparing their different pigments and colorations