实验报告英文
Title: Experimental Report on the Effects of Different Factors on Plant Growth
Introduction:
In this experimental report, we aim to investigate the impacts of various factors on plant growth. Understanding the interplay between these factors enables us to make informed decisions in optimizing plant growth and improving agricultural practices. By applying scientific methods and analyzing the results, we can uncover valuable insights that contribute to enhancing crop productivity and sustainability.
Experiment 1: Light Intensity
To study the influence of light intensity on plant growth, we set up three groups of plants exposed to different light conditions: high, medium, and low intensity. The plants were monitored for a period of four weeks, measuring growth rate, leaf color, and overall health. It was observed that plants subjected to high light intensity exhibited faster growth rates, greener leaves, and robust health compared to the other groups. This suggests that light intensity significantly affects photosynthesis and overall plant development.
Experiment 2: Soil Moisture
The second experiment aimed to assess the effect of soil moisture on plant growth. Planting identical seeds in three pots with varying moisture levels, we carefully controlled the amount of water supplied to each plant. After six weeks, the plants receiving moderate moisture showed the most promising results with healthy growth, vibrant foliage, and root development. Too much or too little moisture hindered plant growth, highlighting the importance of maintaining optimal soil moisture levels for healthy plant growth.
Experiment 3: Nutrient Availability
Another crucial factor that impacts plant growth is nutrient availability. For this experiment, we used three groups of plants: one receiving a balanced nutrient solution, another with a deficiency in one key nutrient, and a third group without any added nutrients. The plants receiving the balanced nutrient solution exhibited vigorous growth, greener leaves, and higher yields. However, the plants with nutrient deficiencies displayed stunted growth, yellowing leaves, and reduced productivity. These findings emphasize the significance of adequate nutrient supply for plant development and crop quality.
Experiment 4: Temperature Variations
Temperature fluctuation is a significant climatic factor affecting plant growth. We conducted a comparative study using different temperature regimes: low, moderate, and high. After eight weeks, it was observed that plants grown under moderate temperature conditions displayed the best growth parameters, with healthy foliage, sturdy stems, and optimal leaf size. Extreme temperatures, both low and high, negatively impacted plant growth, leading to reduced productivity and physiological stress.
Conclusion:
This experimental report highlights the influential role of various factors on plant growth, underscoring the need for meticulous control and optimization in agricultural practices. Understanding the impacts of light intensity, soil moisture, nutrient availability, and temperature variations can guide farmers and researchers in maximizing crop yields, improving food security, and promoting sustainable agricultural practices. By carefully manipulating these factors based on scientific principles, we can contribute to the development of innovative agricultural techniques that ensure efficient resource utilization and minimal environmental impact.
化学实验报告英文 Chemical Experiment Report Introduction: Chemical experiments play a crucial role in the field of chemistry as they allow scientists to observe and understand the behavior of various substances and their reactions. This report aims to present the findings and observations from a recent chemical experiment conducted in the laboratory. Experimental Procedure: The experiment focused on the synthesis of a compound through a series of chemical reactions. Firstly, the required chemicals were gathered, including reactants, catalysts, and solvents. Careful measurements were made to ensure the accurate mixing of the substances. The experiment involved several steps, each with specific reaction conditions and timeframes. The reactions were conducted in a controlled environment, maintaining a constant temperature and pressure. The progress of each reaction was monitored using various analytical techniques, such as spectroscopy and chromatography. Results and Observations: The experiment yielded fascinating results and provided valuable insights into the chemical properties of the substances involved. The reaction kinetics were carefully studied, and the reaction rates were determined. This information can be crucial in understanding the efficiency of the reaction and optimizing the
英文滴定实验报告 英文滴定实验报告 Introduction Titration is a widely used technique in analytical chemistry to determine the concentration of a substance in a solution. In this experiment, we aimed to determine the concentration of hydrochloric acid (HCl) by titrating it with a standardized solution of sodium hydroxide (NaOH). The reaction between HCl and NaOH is a classic example of an acid-base reaction, where the acid (HCl) reacts with the base (NaOH) to form water and a salt. Experimental Procedure 1. Preparation of Standard Solution To prepare the standardized solution of NaOH, we weighed a specific amount of solid NaOH and dissolved it in distilled water. The solution was then transferred to a volumetric flask and diluted to the mark with distilled water. This ensured that we had a known concentration of NaOH for the titration. 2. Preparation of Acid Solution In order to determine the concentration of HCl, we prepared a known volume of HCl solution. This solution was then added to a conical flask. 3. Titration Process Using a burette, we carefully added the standardized NaOH solution to the conical flask containing the HCl solution. We added the NaOH solution drop by drop, while continuously swirling the flask to ensure thorough mixing. The
英语作文,实验报告[5篇材料] 第一篇：英语作文,实验报告 请根据下列内容，写一篇短文，说明整个实验的内容。 实验目的：不打烂鸡蛋取走蛋壳 实验器材：一个玻璃杯，一个小锅，水，一个鸡蛋，醋(vinegar)约250毫升 实验步骤：1.把鸡蛋放在锅中煮十五分钟左右； 2.把煮熟的鸡蛋放到玻璃杯中； 3.往玻璃杯中倒醋，醋要漫过鸡蛋； 4.让鸡蛋仔醋中浸泡24小时。 实验结果：24小时后，鸡蛋壳完全消失。 实验结论：醋中的酸性物质(acid)与蛋壳中的碳酸钙(calcium carbonate)反应生成二氧化碳(carbon dioxide)，蛋壳(shell)消失。 注意：词数：100—120。 写作指导：文章体裁是_______,因此时态可以是_______,全文可以这样分段： 内容及要点信息常用句型及词汇： 实验目的：the aim of the experiment is to…;in order to find out…;we carry out an experiment to…;with the purpose of…;in the hope of 实验器材：you need…;the following things are neededwill be used 实验步骤或方法：cookboil,fill…in,weigh,wait,place,react反应,form；first,first of all,next,second,after that,finally, in the end,at last, for 15minutes,24hours later… 实验结论：from this we can conclude…we can learn from the experiment…we can find out that…the result is…you can seediscover… 连词成句，再用上恰当的过渡词连句成篇：
高中英语作文：实验报告 第一篇：高中英语作文：实验报告 烧水的实验报告英语作文范文一 Water Boiling Aim: 1.To find out / observe the temperature when water is boiling. 2.To find out what happens when water is boiling.Apparatus: a test tube, water, thermometer, Bunsen burner Method: 1.Half-fill the test tube with water. 2.Put the thermometer in the test tube with water. 3.Heat the water in the test tube and watch the reading of the thermometer.Result: When the temperature reaches 100 degrees centigrade, bubbles begin to appear.Conclusion: 1.Water boils when the temperature reaches 100 degrees centigrade. 2.A lot of bubbles appear during the boiling.范文二The aim of the experiment is to observe the temperature when water boils and what happens in water during boiling.T o carry out the experiment, you need the following equipment: a test tube, water, thermometer and Bunsen burner.First, half-fill the test tube with water.Then put the thermometer in it.Finally, heat the water, and observe the number / reading of thermometer.Now you can see that when the temperature reaches 100 degrees centigrade, plenty of bubbles form on the water surface.So we can draw a conclusion: water starts boiling at 100 degrees centigrade;in addition, plenty of bubbles appear during boiling.
求一篇英文的化学实验报告范文（ Chemistry Lab sample (This is one of my Chemistry 11 lab assignment。) Title: Cooling and Heating Curves of a Pure Substance Objectives: to investigate the cooling process for liquid paradichlorobenzene to investigate the heating process for solid paradichlorobenzene Materials: Apparatus: rin stand and ring support buret clamp bunsen burner; wire gauze with ceramic centre; test tube(18mm*150mm); beaker(400ml); 2 thermometers; lab apron; safety goggles. Reagent: paradichlorobenzene Procedure: Data and observations: So generally, its the data you record throughout the lab. Data table should be customized for each lab. Conclusion: Questions and follow-up questions: Answer any question assigned at the back of the lab After all, this is only a high school lab example. If you are looking for a university chem lab template, i guess it would be more spesific in details。 well, generally, it goes like that. you can write your own one as long as you think you make clear of what you do. Have fun with it. 求一份英文实习report(300字左右) 这是范文这学期是我任教的第一学期，我担任初一级七班，八班的英语教学。 由于教学经验颇浅。因此，我对教学工作不敢怠慢，认真学习，深入研究教法，虚心向前辈学习。 经过一个学期的努力，获取了很多宝贵的教学经验。以下是我在本学期的教学情况。 因此，了解和分析学生情况，有针对地教对教学成功与否至关重要。最初接触教学的时候，我还不懂得了解学生对教学的重要性，只是专心研究书本，教材，想方设法令课堂生动，学生易接受。
英文实验报告的格式和写法 英文实验报告的格式和写法 一份最标准的实验报告的格式： 1. Abstract 2. Introduction 3. Method 4. Results 5. Discussion 6. Conclusion 7. Reference Abstract 摘要摘要，就是整篇文章摘出来的要。 强烈建议整篇文章写完后再写摘要。 把文章每个部分选一些句子出来就可以拼凑成一个abstract了。 一个abstract 的模板： 1 一两句话说明这个实验的主要理论依据，或者实验需要证明的假说。 2 一两句话说一下这个理论或者假说的相关的研究。 3 两三句话描述一下实验 4 两三句话概括一下实验结果 5 一句话说一个结论，解释一下这个实验的意义或结果的重要性 转一个别人的example: Does a child’s focus correlate with barometr ic pressure? if so, does it correlate positively or negatively? Tucker (1999) hypothesized a negative correlation, but this assertion has never been tested. Our team used the MISHA CPT to measure the focus of a group of 150 third-grade students. we divided
the students into three groups of 50 students. one group took the MISHA CPT when barometric pressure was low, another group took it when barometric pressure was neutral, and the final group took it when barometric pressure was high. the results found that children focused significantly better when barometric pressure was low than when barometric pressure was neutral or high. the results suggest that when diagnosing ADHD, practitioners should give the CPT when barometric pressure is neutral. Introduction Introduction以实验目的为开头，解释一下这个实验需要证明的东西。具体实验目的视全篇实验报告长度而定，几段到几页都有的。 实验目的写完后介绍实验基本理论。介绍一下前人或者文献里的相近相关的实验，写一下他们的成果以及不到位的地方。（well, 如果是学校安排的每年都要做的实验就写写类似相关实验的优劣吧），这部分注意写reference。 然后介绍一下实验过程。如果实验用了一些非常见的仪器，也可以在这个部分做一个简要介绍。 再转一篇我认为写得很好的Introduction example Introduction In this lab, we explore the theory of optimal foraging and the theory of central place foraging using beavers as the model animal. Foraging refers to the mammalian behavior associated with searching for food. The optimal foraging theory assumes that animals feed in a way that maximizes their net rate of energy intake per unit time (Pyke et al. 1977). An animal may either maximize its daily energy intake (energy maximizer) or minimize the time spent feeding (time minimizer) in order to meet minimum requirements. Herbivores commonly behave as energy maximizers (Belovsky 1986) and accomplish this maximizing behavior by choosing food that is of high quality and has low-search and low-handling time (Pyke et al. 1977). The central place theory is used to describe animals that collect food and store it in a fixed location in their home range, the central place (Jenkins 1980). The factors
英文版的化学实验报告 英文版的化学实验报告 Introduction: Chemical experiments are an essential part of scientific research and education. They provide valuable insights into various chemical reactions and help us understand the properties and behavior of different substances. In this report, we will discuss the process and findings of a chemical experiment conducted to investigate the reaction between hydrochloric acid and sodium hydroxide. Experimental Procedure: 1. Materials: The materials used in the experiment included hydrochloric acid (HCl), sodium hydroxide (NaOH), distilled water, a burette, a conical flask, a pH meter, and a magnetic stirrer. 2. Preparation: A solution of hydrochloric acid was prepared by diluting a given volume of concentrated hydrochloric acid with distilled water. Similarly, a sodium hydroxide solution was prepared by dissolving a specific amount of sodium hydroxide pellets in distilled water. 3. Setup: The burette was filled with the sodium hydroxide solution, and the conical flask was placed on the magnetic stirrer. The pH meter was calibrated according to the manufacturer's instructions. 4. Titration: The hydrochloric acid solution was slowly added to the conical flask while stirring continuously. The pH meter was used to monitor the change in pH during the titration process. The addition of hydrochloric acid was stopped when
Determination of heavy metals in soil by atomic absorption spectrometry（AAS) Name: XuFei Group: The 3rd group Date: Sep。 20th 2012 Part 1 The introduction 1。1The purposes （1）Learn how to operate the atomic absorption spectrometry; （2)Learn how to do the pretreatment of soil samples; （3)Get familiar with the application of atomic absorption spectrometry。 1.2The principles Atomic Absorption Spectrometry (AAS) is a technique for measuring quantities of chemical elements present in environmental samples by measuring the absorbed radiation by the chemical element of interest。 This is done by reading the spectra produced when the sample is excited by radiation. The atoms absorb ultraviolet or visible light and make transitions to higher energy levels 。 Atomic absorption methods measure the amount of energy in the form of photons of light that are absorbed by the sample。 A detector measures the wavelengths of light transmitted by the sample， and compares them to the wavelengths which originally passed through the sample。 A signal processor then integrates the changes in wavelength absorbed， which appear in the readout as peaks of energy absorption at discrete wavelengths. The energy required for an electron to leave an atom is known as ionization energy and is specific to each chemical element。 When an electron moves from one energy level to another within the atom， a photon is emitted with energy E. Atoms of an element
实验报告格式英文 实验报告格式英文 Introduction In scientific research, conducting experiments is a crucial step in gathering data and analyzing results. To effectively communicate the findings, it is essential to follow a specific format for writing an experimental report. This article aims to provide a comprehensive guide on the format of an experimental report in English. Title and Abstract The title of the experimental report should be concise and accurately reflect the content of the study. It should be followed by an abstract, which provides a brief summary of the experiment's objectives, methods, and key findings. The abstract should be concise, informative, and no more than 200 words. Introduction The introduction section sets the context for the experiment and provides background information on the topic. It should clearly state the research question or hypothesis that the experiment aims to address. Additionally, it should highlight the significance of the study and its potential contributions to the field. Methods In this section, the experimental procedures and materials used should be described in detail. This includes information on the study design, sample size,
Preparation of Aspirin Purpose of experiment Understand principles and methods of preparation of aspirin Laboratory supplies Acetic anhydride Salicylic acid Strong phosphoric acid Cold water Ice water Distilled water Graduated cylinder Dryer Distillation flasks Alcohol lamp Tripod Asbestos nets Thermometer Rubber plugs Condenser tube Rubber hose Horn tube Erlenmeyer flask Glue applicator Beaker Filter paper Buchner funnel Smoke filter Vacuum pump filter Glass rods Pallet scales Experimental principle and steps Step one : Take 20ml acetic anhydride in the dry distillation of the distillation flask. Take the steam out of 138 °c above the fractions of 6ml and the rest of the collection.As Figure : Phenomena: 136 °c began to slip out of the liquid, to 138 °c will be able to collect the required fraction. Discussion.: New distilled acetic anhydride, as long the acetic anhydride may contain acetic acid, will affect the response. The distillation is not using oil-bath heating, oil-bath heating is designed to control temperature, distillation of acetic anhydride is direct to let its temperature rises. Step two : Take 4 grams of salicylic acid in the Erlenmeyer flask placed in a dry, 6ml new distilled acetic anhydride, and then add 10 drops of concentrated phosphoric acid drops, control heating at 75 ° c water bath for 20 minutes.After this heat, pour the hot water 5ml, full shock, then poured into the 60ml cold water, in the ice water to cool for 15 minutes and see. Phenomena: Water-bath heating finishes, powder reaction of salicylic acid out,
关于英文版化学实验报告 篇一：英文版化学实验报告 Title: Preparation of Fe scrap from waste (NH4) 2SO4.FeSO4.6H2O The purpose of the experiment Learn the method used scrap iron preparation of ferrous ammonium sulfate. Familiar with the water bath, filtered, and evaporated under reduced pressure and crystallization basic working. The experimental principle, the iron and sulfuric acid to generate reactive ferrous sulfate, ferrous sulfate and ammonium sulfate in an aqueous solution of equal molar interaction, becomes less soluble blue generate ferrous ammonium sulfate. Fe+H2SO4=FeSO4+H2 (gas) FeSO4+ (NH4)2SO4+6H2O=(NH4)2SO4.FeSO4.6H2O Usually ferrous rocks are easily oxidized in air, but after the formation of relatively stable perfunctory, not to be oxidized. Experiment to use instruments, scales, constant temperature water bath, pumps, basins, cups, 10ml graduated cylinder, asbestos mesh, glass, tripod, alcohol lamp, funnel. Iron pieces to a solid pharmaceutical use, use of acid ammonium sulfate and 3mol / l of sulfuric acid, concentrated sulfuric acid. The experiment was divided into four steps. The first step Said iron powder 4g into a beaker and then 50ml 10ml, 3mol / L H2SO4 was added to the same beaker. The second step will be the beaker is heated to no more bubbles, and then filtered hot and the filtrate was then filled in 100ml beaker. The third step, called 4g (NH4)2SO4, and the resulting
化学实验报告英文版 Chemical Experiment Report Introduction: In this experiment, the aim was to investigate the effects of different concentrations of a reactant on the rate of a chemical reaction. The reaction between hydrochloric acid (HCl) and sodium thiosulfate (Na2S2O3) was chosen as the model system. The rate of this reaction can be determined by measuring the time taken for the solution to become opaque due to the formation of a precipitate of sulfur. Materials and Methods: 1. Chemicals: - Hydrochloric acid (HCl) - Sodium thiosulfate (Na2S2O3) - Distilled water 2. Apparatus: - Beakers - Stopwatch - Measuring cylinder - Glass rod - Pipette 3. Procedure: 1. Prepare five different solutions of sodium thiosulfate with concentrations
薄层色谱实验报告英文版 Thin Layer Chromatography Experiment Report Introduction: Thin layer chromatography (TLC) is a widely used analytical technique in chemistry for separating and identifying different components of a mixture. It is a simple and quick method that involves the separation of compounds based on their polarity and their interaction with a stationary phase and a mobile phase. In this experiment, we used TLC to separate and identify the components of a mixture of food dyes. Materials and Methods: The materials used in this experiment were a TLC plate, a mixture of food dyes, a developing chamber, and a solvent system consisting of ethyl acetate and hexane in a 1:1 ratio. The TLC plate was first marked with a pencil line about 1 cm from the bottom. A small amount of the mixture of food dyes was spotted on the pencil line using a capillary tube. The TLC plate was then placed in the developing chamber with the solvent system. The solvent system was allowed to move up the plate by capillary action until it reached the top. The plate was then removed from the chamber and allowed to dry. The separated components were then visualized using a UV lamp. Results: The TLC plate showed the separation of the components of the mixture of food dyes. The components were identified based on their Rf values, which is the ratio
大学物理实验报告 Ferroelectric Control of Spin Polarization ABS TR AC T A current drawback of spintronics is the large power that is usually required for magnetic writing, in contrast with nanoelectronics, which relies on “zero-current,” gate-controlled operations. Efforts have been made to control the spin-relaxation rate, the Curie temperature, or the magnetic anisotropy with a gate voltage, but these effects are usually small and volatile. We used ferroelectric tunnel junctions with ferromagnetic electrodes to demonstrate local, large, and nonvolatile control of carrier spin polarization by electrically switching ferroelectric polarization. Our results represent a giant type of interfacial magnetoelectric coupling and suggest a low-power approach for spin-based information control. Controlling the spin degree of freedom by purely electrical means is currently an important challenge in spintronics (1, 2). Approaches based on spin-transfer torque (3) have proven very successful in controlling the direction of magnetization in a ferromagnetic layer, but they require the injection of high current densities. An ideal solution would rely on the application of an electric field across an insulator, as in existing nanoelectronics. Early experiments have demonstrated the volatile modulation of spin-based properties with a gate voltage applied through a dielectric. Notable examples include the gate control of the spin-orbit interaction in III-V quantum wells (4), the Curie temperature T C (5), or the magnetic anisotropy (6) in magnetic semiconductors with carrier-mediated exchange interactions; for example, (Ga,Mn)As or (In,Mn)As. Electric field–induced modifications of magnetic anisotropy at room temperature have also been reported recently in ultrathin Fe-based layers (7, 8). A nonvolatile extension of this approach involves replacing the gate dielectric by a ferroelectric and taking advantage of the hysteretic response of its order parameter (polarization) with an electric field. When combined with (Ga,Mn)As channels, for instance, a remanent control of T C over a few kelvin was achieved through polarization-driven charge depletion/accumulation (9, 10), and the magnetic anisotropy was modified by the coupling of piezoelectricity and magnetostriction (11, 12). Indications of an electrical control of magnetization have also been provided in magnetoelectric heterostructures at room temperature (13–17). Recently, several theoretical studies have predicted that large variations of magnetic properties may occur at interfaces between ferroelectrics and high-T C ferromagnets such as Fe (18–20), Co2MnSi (21), or Fe3O4 (22). Changing the direction of the ferroelectric polarization has been predicted to influence not only the interfacial anisotropy and magnetization, but also the spin polarization. Spin polarization [i.e., the normalized difference in the density of states (DOS) of majority and minority spin carriers at the Fermi level (E F)] is typically the key parameter controlling the response of spintronics systems, epitomized by magnetic tunnel junctions in which the tunnel magnetoresistance (TMR) is related to the electrode spin polarization by the Jullière formula (23). These predictions suggest that the nonvolatile character of ferroelectrics at the heart of ferroelectric random access memory technology (24) may be exploited in spintronics devices such as magnetic random access memories or spin field-effect transistors (2). However, the nonvolatile electrical control of spin polarization has not yet been demonstrated. We address thi s issue experimentally by probing the spin polarization of electrons tunneling from an Fe electrode through ultrathin ferroelectric BaTiO3 (BTO) tunnel barriers (Fig. 1A). The BTO polarization