【 – 小学作文】
篇一:《八年级学生作文：冬虫夏草》
冬虫夏草冬虫夏草是我们藏族人的重要经济来源之一，特别在牧区，牧民的大部份收入要依托冬虫夏草，可以说冬虫夏草成了我们藏族人的衣食父母。玉树的春天在五六月才算真正到来，而冬虫夏草也在这个时候开始采挖。这时候候高山上的冰雪基本融化，高原大地进入了暖和的季节，冰雪融化了，也就是挖虫草的预兆。这时候候，藏族人会在山顶或半山腰里挂上一些经幡。我不太知道其中的含义。后来听家人说，挂经幡是为了祈祷这一年能够挖到更多的冬虫夏草，收入更多一些。玉树迟来的春天，人们几近感觉不到。春天过后马上是夏天，人们对夏天的期待更切。挖虫草的时候，很多外地人也来玉树做虫草生意或采挖虫草。冬虫夏草在一定程度上丰富了藏人的生活质量。有了钱，可以送孩子上学，可以做生意。夏天挖了很多虫草后，几近整个秋冬不干其他活。冬虫夏草在某种意义上使藏族人变得怠惰了。听说今年虫草未几，这或许是人类把好好的大山给挖坏了，满山的窟窿，遍体鳞伤的草山仿佛只剩下躯壳了，不知道多少年后才能愈合。这样下去，草山变成沙漠了，很多生物、动物难以生存，固然也包括人类。而且一些地方由于虫草发生草山纠纷，打架伤人。冬虫夏草一方面给我们带来了经济上的富裕，一方面也带来很多负面影响。
篇二:《冬虫夏草论文》
Cordyceps Sinensis
Summary: Cordyceps Sinensis is a rare fungus herbal medicine in China. It is a combination of Cordyceps which comes from parasitic fungus in the bat moth larvae. Narrow geographical distribution of wild Cordyceps, low natural parasitism, demanding environmental conditions contribute to its relatively limited resources. Cordyceps Sinensis has potent antioxidant and anti-lipid peroxidation activities. It can strengthen the brain and heart vessel, and protect the liver from damage.
Key words: Cordycepin, micro dialysis, hypoxanthinosine, adenosine
1. Morphological characteristics
Cordyceps Sinensis is a rare fungus herbal medicine in China. It is a bat moth larvae which is parasited by Cordyceps bacteria. The parasitic leads to stiff larvae. Then, stick-shaped fungal sub-blocks will grow from the fossilized larvae in summer if the conditions are supportive. The sub-blocks are usually at the length of 3~11cm. The infertility handle department is 3~8cm in length and 1.5~4mm in diameter. The upper part is slightly expanded and in the shape of a cylinder. The brown part is
1.5~4cm in length. Many perithecias can be seen on it except the apex. Most perithecias are immersed in sub-blocks while apexes are out of them. Apexes are of oval shape, at the length of 250~500 microns and 80~200 microns in diameter. A lot of long-stripe-like daughter cysts are inside the perithecias. Moreover, every perrithecia has eight ascospores which are equipped with septum.。
Cordyceps Sinensis is a combination of entity and hypocrea. It is 9~12cm in all. Entity is like a trimolter . It is 3~6cm in length and 0.4~0.7cm in diameter. It’s saffron yellow , rough and the backside has many horizontal wrinkles while the ventral side has eight pairs of foot among which a half in the middle can be seen easily. The center of fault surface is substantial, white with a little yellow. The circum appears deep yellow. Hypocrea comes from the head of entity。It looks like a stick with a little bend. The upper part of hypocrea is slightly swollen. It is beige or sometimes black brown. Hypocrea is 4~8cm in length and 0.3cm in diameter. Its center is void, pind white , slightly smelly and insipid. Entity which is yellow-bright, plump, yellowish-white in fault surface and short in hypocrea will be
better.
2. Living environment
Cordyceps Sinensis basically originate in Sichuan, Qinghai, Gansu, Guizhou, Yunnan, and Tibet where the elevations are over 3,000 meters with cold climate. When midsummer, snow and ice melting, small and flowery batty moth deposit thousands of eggs on floral leaves. Afterwards, moth eggs become bugs. Then, they get into wet and loose soil, absorb nutrition of radicant and gradually become plump.。 At this time, sphere ascospore will get into bat moth larvae and absorb its nutrition. If bat moth larvae eat leaves which contain Cordyceps fungus, it changes into Cordyceps as well.
Larvae infected by fungus wriggles into spaces 2~3cm away from the earth’s surface and die head up, button down. This is ‘dongchong’. Although the larva has died, fungus in its body grows ceaselessly until fills the whole body. When next summer comes, an aubergine grass comes out from the head of larvae. It is 2~5cm high. There is a pineapple shaped necator at the top. This is ‘xiacao’. Cordyceps are the plumpest and of the highest value now. So it is the best time for picking.
3. Compositions and effects
(1). Chemical composition
Modern Research of Pharmacology indicates that 25%。Cordyceps produced in Qinghai contains 7% Cordycepic acid, 28.9% carbohydrate, 8.4% lipid and 25% protein.
Cordycepic acid is mainly used to treat cerebral edema and keep out ARF. It promotes the metabolism and improves blood microcirculation. It can also decrease blood sugar and ease blood pressure.
82.2% of Cordyceps is unsaturated fatty acid. Besides, it contains vitamin B12, fungisterol, hexosal alcohol and many kinds of alkaloid.
North Cordyceps contain 0.536g Cordycepin while wild ones contain 0.006g. Cordycepin can be used to resist cancer and virus. It is also to be used as antioxidant, deoxyribonucleaseinhibitor, bioactivitor and antimycotics.
North Cordyceps contains rich protein and 19 kinds of amino acid as well. A large number of vitamins must not be neglected. Moreover, the content of VE is higher than mushrooms. The
content of VA is 13 times the quantity of which in pork liver. The content of VB2 is 4.038 times as much as which in ginsengs. The content of VC is 7 times more than which in mushrooms. Vitamin is an essential metabolite to maintain normal function of human body. However, it can’t be synthesized in the body. Only food can provide vitamin to maintain the balance of metabolism. North Cordyceps contain more than 17 kinds of trace elements.
(2). Main effects
A. Adjusting the organism immunity system；
B. Anti-tumor;
C. Antifatigue and improving cell energy;
D. Regulating cardiac function;
E. Enhancing liver function;
F. Regulating respiratory system;
G. Protecting renal function;
H. Regulating hematopoiesis function;
I. Adjusting the lipid;
4. Medical applications and new discoveries
(1). Medical applications
It is applied for deficiency of kidney-yang with impotence or lumbago. With its unique feature of warm but not dry in nature, both invigorating the kidney and strengthening yang, and supplementing the essence. It is frequently adopted as medicinal herbs for supplementing deficiency. For deficiency of the kidney with impotence or emission, it is used together with Bajitian, and Tusizi; for deficiency of the kidney with soreness in waist and knees, with Eucommia Bark, etc.
It is applied for deficiency of the lung or deficiency of both the lung and kidney with chornic cough, dyspnea, or cough with blood-tinged sputum. For chornic cough with blood-tinged sputum, it is used together with Shashen, Ejiao and Chuanbeimu, etc; for dyspnea or palpitation, with Ginseng, hutaorou, etc.
In addition, it is also used for weakness after disease, spontaneous sweating or chillness, etc., and stewed with chicken, duck or pork, etc., which has a remarkable nutritious effect.
(2). New discoveries
A. Pharmacokinetics of Adenosine and Cordycepin, a Bioactive
Constituent of Cordyceps Sinensis in Rat
Cordycepin is a bioactive constituent of Cordyceps Sinensis that has been shown to regulate homeostatic function. As an adenosine
analogue, it is possible Cordycepin goes through a similar metabolic pathway to that of adenosine. To investigate this hypothesis, a sensitive liquid chromatography with photodiode-array detector (HPLC-PDA) coupled to a micro dialysis sampling system was developed to monitor Cordycepin and adenosine in rat blood and liver. Other endogenous nucleosides were simultaneously measured to further understand the downstream metabolic pathway. The experiments were divided into six parallel groups for drug administration: (1) normal saline vehicle, (2) adenosine, (3) Cordycepin, (4) normal saline + erythro-9-(2-hydroxy-3-nonyl) adenine (EHNA; a potent adenosine deaminase inhibitor), (5) adenosine + EHNA, and (6) Cordycepin + EHNA. The pharmacokinetic results suggest that the levels of both adenosine and Cordycepin decreased rapidly in blood around 30 min after drug administration. When adenosine was given, the concentrations of adenosine metabolites, hypoxanthinosine and hypoxanthine, increased in rat blood. This phenomenon was inhibited by EHNA pretreatment. An unidentified peak was observed in the blood and liver samples after Cordycepin administration. The decline of this unidentified peak paralleled the decreased of the concentration of Cordycepin, and it was not observed in the presence of the adenosine deaminase inhibitor. It is concluded that adenosine and Cordycepin had short elimination half-lives and high rates of clearance and their biotransformation was suppressed by EHNA.
B. Regulatory Mechanisms of Cordyceps Sinensis on
Steroidogenesis in MA-10 Mouse Leydig Tumor Cells
Cordyceps Sinensis is an herbal medicine that increases Steroidogenesis in Leydig cells and improves male reproductive dysfunction. We have found that CS stimulates Leydig cell Steroidogenesis through the protein kinase A and protein kinase C signaling pathways. In the present study, we sought to determine the mechanisms of CS-stimulated Steroidogenesis in MA-10 mouse Leydig tumor cells. Using pharmacological approaches, we found that de novo protein synthesis, protein transcription, a calcium signal, and a mitochondria electrochemical gradient were required for CS-stimulated Steroidogenesis in MA-10 cells. mRNA expression of Steroidogenesis acute regulatory protein was activated by CS. However, CS had an adversary effect on P450 side-chain cleavage enzyme activity, but not in 3-hydroxysteroid dehydrogenase enzyme, in regulating MA-10 cell Steroidogenesis. In conclusion, de novo
protein synthesis, increased Steroidogenesis acute regulatory protein mRNA expression, and the mitochondria electrochemical gradient were involved in CS-stimulated Steroidogenesis in MA-10 cells.
C. Molecular phylogeny of the entomopathogenic fungi of the
genus Cordyceps and its evolutionary implications
Cordyceps is an endoparasite ascomycetous genus containing approximately 450 species with a diversity of insect hosts, traditionally included in the family Clavicipitaceae of Ascomycota. Establishing the relationships among species with a varied range of morphologies and hosts is of importance to our understanding of the phylogeny and co-evolution of parasites and hosts in entomopathogenic ascomycetes.To this end, we used a combination of molecular index and morphological characters from 40 representative species to carry out comprehensive molecular phylogenetic analyses. Based on the phylogenetic tree, we used the program DISCRETE for inferring the rates of evolution and finding ancestral states of morphological character. The phylogenetic analyses revealed two important points. (i) Types of perithecia attached to stroma reflected an evolutionary trend in Cordyceps. The vertically immersed perithecia form was the ancestral state, superficial and obliquely immersed perithecia were derived characters, obliquely immersed was irreversible. Species with obliquely immersed perithecia were in a closely related group and were the derived group. (ii) A strong correlation between fungal relatedness and the microhabitat supported the hypothesis that the host jumps through commingling in soil microhabitats. Based on the results of these analyses, host switching explains the diversity of entomopathogenic fungi of the genus Cordyceps.{家乡的冬虫夏草作文}.
5. Domestic and international evaluations
Cordyceps became famous because of its powerful aphrodisiac effects. Recent studies performed at Beijing Medical University of China and in Japan have shown a 64% success rate among men suffering from impotence, vs. 24% in the placebo group.
In the ancient China, Cordyceps was highly recommended as one of the most effective medicines for all illness. Due to its anti-aging and cure-all properties, it can be compared to ginseng, reishi and deer velvet. In general, Cordyceps is a tonic that helps the body build strength, improve the organic functioning, strengthen the immune system and bring longevity.
篇三:《我的家乡》{家乡的冬虫夏草作文}.
大美青海，魅力海西
德令哈市实验小学八年级（3）班 崔玉琰
ⅹⅹ同学：
你好，我是青海省海西州德令哈市实验小学八年级（3）班的一名学生，尽管我们相隔千里，素不相识，但是我相信通过书信交往一定会成为好朋友。首先，我介绍一下我美丽而神圣的家乡—–大美青海！
我的家乡德令哈位于柴达木盆地，这里虽然是盆地，但这里也是海拔3000米以上的青藏高原地带，居住在高原上的人们，自然而然的流露出大自然所赋予的那种热情、奔放、豪迈、勇敢的个性，而动物和植物也有大自然所打造的坚韧与耐寒的特性。这里的动植物大部分都是名贵的中药材，如红景天、藏红花、佛手参、藏雪莲、冬虫夏草、鹿茸、麝香等等都有着很高的药用价值。
除此之外，我们这里还有很多的迷人自然风景区，虽然比不上南方的山川秀丽，北方的银装素裹，但那是大自然所赋予的天然景区，如青海湖、金子海、哈里哈图、贝壳梁、外星人遗址等都是一个又一个神奇而令人向往的地方，自然也流传着许多神话故事。其中的可鲁可湖和托素湖是两个很神奇而美丽的湖泊，可鲁可湖和托素湖的蒙古语的意思是“多草的笈笈滩”和“酥油湖”的意思，它们之间由一条小河相连，当地的人们把它们称为“情人湖”。虽然两个湖连
在一起，但它们却完全不同。可鲁可湖是一个水草肥美的淡水湖，而托素湖却属于高原咸水湖，岸边别说是耐碱的胡杨，就连一颗草也没有，可以说是一片不毛之地的荒漠。因此，根据两个湖的名字和湖水的性质，当地流传着一个美丽传说。古时候，有一对恩爱的夫妻，一次丈夫外出卖盐，久久不归，担心的妻子千辛万苦沿途寻找，结果发现自己的丈夫死在了回家的路上，悲痛万分的妻子泣泪而哭。几天后，人们看到悲痛过度的妻子死在丈夫的身旁，后来，丈夫化为没有植被的托素湖，妻子化为植被茂盛的可鲁可湖。听到这些，你觉得我的家乡—-青海无限美吗！
欢迎五湖四海的朋友到我的家乡—-大美青海来做客。 此致
敬礼
你的朋友：崔玉琰{家乡的冬虫夏草作文}.
二〇一二年八月十一日
篇四:《小学作文：坏坏的食虫草》
坏坏的食虫草
上个星期六，妈妈买了一份食虫草的种子。包装袋上有它的照片：能捉昆虫、有尖锐的牙齿、很大的嘴巴！我想象着有一天食虫草长大了，不时咧着嘴坏坏对我笑的样子！
我把土放进花盆里，播种，然后盖上薄薄的一层土，再浇水，最后放在阳台晒……十几天过去了，叶芽始终没有长出来，我和妈妈终于明白：种子是假的！唯利是图的小贩愚弄了我们！可恶！
篇五:《介绍一种家乡的特产作文教学设计》
《介绍一种家乡的特产》{家乡的冬虫夏草作文}.
作文教学设计
北师大版三年级下册第七单元
《介绍一种家乡的特产》
作文教学设计
一、教材简析：
此次习作为小学语文北师大版三年级下册第七单元“特产”的“笔下生花”内容之一。此次作文是写家乡的一种特产，要求不但要写出特产的特点，更要写出“我”对这种特产的观察和体验，这是一次状物作文的练习。要让学生把握特产的特征，教师首先就要带领学生进行认真细致地观察，发现特产在形态、颜色、味道、用途等方面的特点。
二、习作要求：
1、介绍一种家乡的特产。
2、抓住特点，写出这种特产的形状、颜色、大小、作用等。
3、表达出自己的喜爱之情。
4、培养学生热爱家乡的思想感情。
三、教学重、难点分析：
1、重点：
（1）抓住特点写家乡的一种特产，能写出这种特产在形态、颜色、味道等方面的特点。
（2）培养学生热爱家乡的思想感情。
2、难点：指导学生分步骤进行观察，写出自己的观察和体验，突出“我爱家乡”的主题。{家乡的冬虫夏草作文}.
四、教具准备：PPT课件、各种特产的实物或图片等。
五、设计总述：
充分利用课内外学习资源，尊重学生的认识、体验，引导学生观察体会特产的形态、颜色、味道，让他们联系生活实际自己去发现
和感受，写出自己的所见、所闻、所感，表达对家乡的热爱。
六、教学过程：
（一）激趣导入：我们伟大的祖国，历史悠久，地域广阔、山河
壮丽、物产丰富，从雄奇的塞北到秀丽的江南，各地的特产数不胜数。
1、板书：特产
师：什么是特产？
生根据自己的理解回答。
师总结：某地或某国特有的或特别著名的产品就叫特产。
2、你知道全国各地有哪些特产？（生答）
3、同学们知道的特产真多，想看看老师收集的特产么？
课件出示：水果方面的特产——新疆哈密瓜、烟台苹果、上海水
蜜桃、广东荔枝、福建龙眼、余姚杨梅、海南椰子
工艺品类的：安徽铁画；
丝织品类的：湖南湘绣；
手工艺品类的：北京面人；
食品加工类的：北京烤鸭、德州扒鸡、平遥牛肉、兰州牛肉面、
天津大麻花、内蒙古奶皮；
药材类的：藏红花、宁夏枸杞、青海冬虫夏草、云南白药；
观赏类的：洛阳牡丹；
酒类：贵州茅台酒；
矿物类的：新疆和田玉；
文房四宝：湖笔、徽墨、宣纸、端砚
4、同学们看到这么多特产，羡慕吧？其实咱们家乡的特产也很
多，板书：“家乡的”（书写于“特产”）前面。谁能说说？（生答）
7、我们南阳地处中原，四季分明，物华天宝，特产很多
出示课件：南阳黄牛、独山玉石、独玉雕、南阳烙画、南阳出师
表、南阳三宝、还有地方特产（社旗小磨油、马山柿饼、界中米醋）；水果类的有内乡樱桃、大寨草莓、西峡猕猴桃；南阳的名吃（镇平烧鸡、南阳油茶、博望锅盔、方城烩面、唐河凉粉、桐河桐蛋）
8、看到这么多家乡的特产，你有什么感受？（自豪、骄傲）
9、同学们，随着改革开放，南阳正走出国门走向世界，肯定会有很多外地人来到我们南阳观光旅游，大家愿不愿意把这些特产推荐给来自五湖四海的人们？让更多的人来欣赏和购买我们家乡的特产，提高家乡的知名度，让我们的家乡尽快富裕起来？（愿意）那么我们今天就安排大家介绍家乡的特产。
出示课件：习作要求
1、介绍一种家乡的特产。
2、抓住特点，写出这种特产的形状、颜色、大小、 作用等。
3、表达出自己的喜爱之情。
（二）、习作指导
1、同学们知道怎样介绍吗？昨天，我们学习了《我爱故乡的杨
梅》，谁还记得这课的写法？
生答，师总结，出示课件（《我爱故乡的杨梅》）：
2、回顾课文，总结写