福尔马林是啥?

Posted 2023-05-05

参考技术A 问题一：福尔马林是什么? 福尔马林是甲醛的水溶液，是蛋白质凝固剂.其药效与使用时的温度、环境有关，水温在23℃～26℃时，48小时最大安全浓度为56PPm，一般实际使用时泼洒30PPm是无害的，水温在28℃以上时，药效对水中浮游生物有杀灭作用.福尔马林为无色液体，有防腐功能，如尸体防腐等作用。用于养鱼方面，按比例稀释水中，可以激活疲惫鱼只，使其更加活跃，但不适宜入口及接触脸面。 日前有老人误服中毒案例。为了防止过量的福尔马林对人体造成危害，国家质量技术监督检验检疫总局日前出台了在国内销售的纤维制品(包括面料及辅料)福尔马林含量标准并从明年1月1日起正式实施。
福尔马林在纤维制品中主要用于染色助剂以及提高防皱、防缩效果的树脂整理剂。医学专家认为，它是一种慢性中毒药物，长期接触低剂量的福尔马林会引起慢性呼吸道疾病、女性月经紊乱、新生儿体质降低甚至鼻咽癌等病症。高浓度的福尔马林对神经系统、免疫系统、肝脏等都有毒害作用。
人民网－江南时报2002年12月23日

问题二：福尔马林是什么东西？干什么用的? 福尔马林是甲醛的水溶液，是蛋白质凝固剂.其药效与使用时的温度、环境有关，水温在23℃～26℃时，48小时最大安全浓度为56PPm，一般实际使用时泼洒30PPm是无害的，水温在28℃以上时，药效对水中浮游生物有杀灭作用.福尔马林为无色液体，有防腐功能，如尸体防腐等作用。用于养鱼方面，按比例稀释水中，可以激活疲惫鱼只，使其更加活跃，但不适宜入口及接触脸面。 日前有老人误服中毒案例。为了防止过量的福尔马林对人体造成危害，国家质量技术监督检验检疫总局日前出台了在国内销售的纤维制品(包括面料及辅料)福尔马林含量标准并从明年1月1日起正式实施。 福尔马林在纤维制品中主要用于染色助剂以及提高防皱、防缩效果的树脂整理剂。医学专家认为，它是一种慢性中毒药物，长期接触低剂量的福尔马林会引起慢性呼吸道疾病、女性月经紊乱、新生儿体质降低甚至鼻咽癌等病症。高浓度的福尔马林对神经系统、免疫系统、肝脏等都有毒害作用。

问题三：福尔马林是干什么用的？ 福尔马林的用处根据浓度不同有两个方面，一憨是百分之四的浓度用来杀真菌，比如泡脚脚气呀。二,是百分之四十的浓度用来防腐，如医学上防止解剖的尸体腐烂等。但是福尔马林是强防腐剂,防腐效果相当好,但是也是强致癌物,所以不得用于食品防腐。

问题四：福尔马林到底是什么味道啊 因内含的甲醛挥发性很强，开瓶后一下子就会散发出强烈的刺鼻味道 福尔马林基本性质： ”福尔马林〃〈formalin；福美林〉是”甲醛〃〈formaldehyde〉的水溶液，外观无色透明，具有腐蚀性，且因内含的甲醛挥发性很强，开瓶后一下子就会散发出强烈的刺鼻味道。而甲醛则是一种高 *** 性有毒气体，具易燃性及腐蚀性，在一般空气里均能测出微量，相当易溶于水，制造上通常利用化工方法氧化甲醇〈Methauol；木精〉而得。甲醇氧化之后可得甲醛，而甲醛继续氧化之后可得甲酸〈formic acid；蚁酸〉。三者皆为毒性物质，在剂量相同的情形下，以对人体的毒性而言，毒性比为甲醇：甲醛：甲酸 = 1：30：6 ，即甲酸的毒性为甲醇之六倍，而甲醛的毒性为甲醇之三十倍。 而福尔马林不可接触强氧化剂、强碱、酚类、尿素等物质，易引起化学反应造成危险。 福尔马林的使用涵盖之层面其实相当广泛，其中因甲醛能与蛋白质的氨基结合，使蛋白质凝固，因此在医药上可做为检验时的组织固定剂、以及防腐剂等。在浓度与剂量足够时，此特性对大部分微生物都具破坏能力，所以也常做为一种消毒剂。而福尔马林在工业上的使用，性质也相当多，例如运用于制作黏着剂、染剂、涂料等，所衍生出来的产品在我们的生活中其实相当容易接触到〈亦是气喘之可能过敏源〉。畜牧业也常利用福尔马林搭配”高锰酸钾〃〈Potassium permanganate〉来进行寮舍或鸡蛋孵化前的甲醛熏烟消毒。至于用在鱼病治疗上，至少有八十年以上的历史，对体外寄生虫与真菌、细菌甚至病毒的感染，都有不错的作用力。它的主要优点是便宜，且对病原体等能做迅速而有效的处理。 目前市面上常见到的福尔马林，甲醛含量浓度大约在24 % ~ 40 %之间，在医药上，福尔马林的定义多指浓度35%或37%以上的甲醛水溶液。 对人体可能的伤害： 据很多医学报告指出，若人体皮肤直接接触福尔马林时，可能会引发过敏反应、皮肤炎或是湿疹，尤其工作上需长期接触福尔马林的人，经常会有此类现象出现，因此需避免皮肤直接碰触，不慎碰触应速用清水冲洗。甲醛挥发性很强，对眼睛有强 *** 性，具有伤害力，若不慎福尔马林液接触眼部时，请速用大量清水冲洗至少15分钟以上，并尽速就医。而若不慎吸入时，会 *** 口、鼻与呼吸道黏膜组织，轻则疼痛咳嗽，重则呼吸道发炎，甚至肺水肿，也请就医检查为宜。若不慎误饮，量多则有致命之可能。超过安全数值的甲醛及其氧化产物甲酸，均会对人体造成危害，相关急救措施于使用福尔马林前均应先寻求专业咨询，以确保自身安全。 很多科学研究与动物实验早已指出，长期接触福尔马林可能会导致癌症，其已被列为是一种”疑似致癌物质〃！微量甲醛在人体内基本上残留性不强，代谢速度不慢，约35%可代谢为甲酸，而在尿液里以甲酸盐类的型态排出，其余65%可继续代谢为二氧化碳与水排除，但最大的问题是：可能会造成细胞的变性！且细菌、人体分离细胞或动物细胞基因突变测试呈阳性反应，亦不能排除有致生物畸型可能！

问题五：化学中什么是福尔马林?有何用途 甲醛（分子式：HCHO）亦称蚁醛，是最简单的醛类，通常情况下是一种可燃、无色及有 *** 性的气体。易溶于水、醇和醚。35～40％的甲醛水溶液叫做福尔马林。

问题六：福尔马林是什么？有什么作用？ 求解 详细 福尔马林″〈formalin；福美林〉是 甲醛 ″〈formaldehyde〉(HCHO))的水溶液，外观无色透明，具有 腐蚀性 ，且因内含的甲醛挥发性很强，开瓶后一下子就会散发出强烈的刺鼻味道。甲醛含量为35%至40%(一般是37%)的水溶液，也加入10%~15%的 甲醇 防止聚合。具有防腐、消毒和漂白的功能。不同领域有不同作用。
名称
福尔马林″〈formalin；福美林〉通用名： 福尔马林
学名： 甲醛
英文名： Formaldehyde， methanol
汉语拼音： Jia Quan
主要成份： 甲醛
结构式 ：
分子式 ：CH2O
分子量 ：30.03
性状
有 *** 性气味的无色液体。 甲醛 是一种易溶于水的高 *** 性有毒气体，具有易燃性及 腐蚀性 ，在 空气 里一般能测出微量。在甲醛制造方面通常利用氧化甲醇的 化工 方法制得。甲醇 氧化 之后可得甲醛，而甲醛继续氧化之后可得 甲酸 。三者皆为 毒性 物质，在剂量相同的情形下，以对人体的毒性而言，毒性比为甲醇：甲醛：甲酸 = 1：30：6，即甲酸的毒性为 甲醇 之六倍，而甲醛的毒性为甲醇之三十倍。 而福尔马林不可接触 强氧化剂 、强碱、酚类、 尿素 等物质，易引起 化学反应 造成危险。药理作用 ：35～40%的甲醛水溶液叫做福尔马林，阻止细胞 *** 白的合成，抑制细胞分裂及抑制细胞核和细胞浆的合成，导致 微生物 的死亡。用途：能有效地杀死 细菌 繁殖体，也能杀死芽胞（如炭疽芽胞），以及抵抗力强的结核杆菌、病毒。多用于畜禽棚舍、仓库、卵化室、皮毛、衣物、器具等的熏蒸消毒和标本、尸体防腐；也用于胃肠道制酵。
用途
福尔马林的使用涵盖之层面其实相当广泛，其中因甲醛能与 蛋白质 的氨基结合，使蛋白质凝固，因此在医药上可做为检验时的组织固定剂、以及 防腐剂 等。在 浓度 与剂量足够时，此特性对大部分微生物都具破坏能力，所以也常做为一种 消毒剂 。而福尔马林在工业上的使用，性质也相当多，例如运用于制作黏着剂、染剂、 涂料 等，所衍生出来的产品在我们的生活中其实相当容易接触到〈亦是气喘之可能过敏源〉。畜牧业也常利用福尔马林搭配 高锰酸钾 ″〈Potassium permanganate〉来进行寮舍或鸡蛋孵化前的甲醛熏烟消毒。至于用在 鱼病 治疗上，至少有八十年以上的历史，对体外寄生虫与真菌、细菌甚至病毒的感染，都有不错的作用力。它的主要优点是便宜，且对病原体等能做迅速而有效的处理。
并且福尔马林在医学上也是有极大用途的，尸体解剖前，为了完好保存，也要浸泡在福尔马林里面。
目前市面上常见到的福尔马林，甲醛含量浓度大约在24 % ~ 40 %之间，在医药上，福尔马林的定义多指浓度35%或37%以上的 甲醛水溶液 。
福尔马林是甲醛的水溶液，是蛋白质凝固剂。其药效与使用时的温度、环境有关，水温在23℃～26℃时，48小时最大 安全浓度 为56PPm，一般实际使用时泼洒30PPm是无害的，水温在28℃以上时，药效对水中浮游生物有杀灭作用.福尔马林为无色液体，有防腐功能，如尸体防腐等作用。用于养鱼方面，按比例稀释水中，可以激活疲惫鱼只，使其更加活跃，但不适宜入口及接触脸面。 日前有老人误服中毒案例。为了防止过量的福尔马林对人体造成危害，国家 质量技术监督 检验检疫总局出台了在国内销售的纤维制品(包括面料及辅料)福尔马林含量标准并从2003年1月1日起正式实施。 不可保存食物。
福尔马林在纤维制品中主要用于染色助剂以及提高防皱、防缩效果的 树脂整理剂 。医学专家认为，它是一种慢性中 ......>>

问题七：福尔马林是什么味道的？ ＂福尔马林″〈formalin；福美林〉是＂甲醛″〈formaldehyde〉(HCHO))的水溶液，外观无色透明，具有腐蚀性，且因内含的甲醛挥发性很强，开瓶后一下子就会散发出强烈的刺鼻味道。而甲醛则是一种高 *** 性有毒气体，具易燃性及腐蚀性，在一般空气里均能测出微量，相当易溶于水，制造上通常利用化工方法氧化甲醇〈Methauol；木精〉而得。甲醇氧化之后可得甲醛，而甲醛继续氧化之后可得甲酸〈formic acid；蚁酸〉。三者皆为毒性物质，在剂量相同的情形下，以对人体的毒性而言，毒性比为甲醇：甲醛：甲酸 = 1：30：6，即甲酸的毒性为甲醇之五倍，而甲醛的毒性为甲醇之三鼎倍。 而福尔马林不可接触强氧化剂、强碱、酚类、尿素等物质，易引起化学反应造成危险。

问题八：福尔马林是什么？(⊙ө⊙) 福尔马林也叫“甲醛”，是一种强防腐剂，可用于浸泡动物尸体使之不腐烂。
“甲醛”也是现今多种胶合剂的主要原料。据说“甲醛”有很强的至癌性。

问题九：福尔马林的化学名称叫什么 福尔马林″〈formalin；福美林〉是＂甲醛″〈formaldehyde〉(HCHO))的水溶液，外观无色透明，具有腐蚀性，且因内含的甲醛挥发性很强，开瓶后一下子就会散发出强烈的刺鼻味道。甲醛含量为35%至40%(一般是37%)的水溶液，也加入10%~15%的甲醇防止聚合。具有防腐、消毒和漂白的功能。不同领域有不同作用。

问题十：福尔马林是什么? 福尔马林是甲醛的水溶液，是蛋白质凝固剂.其药效与使用时的温度、环境有关，水温在23℃～26℃时，48小时最大安全浓度为56PPm，一般实际使用时泼洒30PPm是无害的，水温在28℃以上时，药效对水中浮游生物有杀灭作用.福尔马林为无色液体，有防腐功能，如尸体防腐等作用。用于养鱼方面，按比例稀释水中，可以激活疲惫鱼只，使其更加活跃，但不适宜入口及接触脸面。 日前有老人误服中毒案例。为了防止过量的福尔马林对人体造成危害，国家质量技术监督检验检疫总局日前出台了在国内销售的纤维制品(包括面料及辅料)福尔马林含量标准并从明年1月1日起正式实施。
福尔马林在纤维制品中主要用于染色助剂以及提高防皱、防缩效果的树脂整理剂。医学专家认为，它是一种慢性中毒药物，长期接触低剂量的福尔马林会引起慢性呼吸道疾病、女性月经紊乱、新生儿体质降低甚至鼻咽癌等病症。高浓度的福尔马林对神经系统、免疫系统、肝脏等都有毒害作用。
人民网－江南时报2002年12月23日

求福尔摩斯英文小报的材料

求福尔摩斯英文小报的材料
只要是英文的资料就可以了啦

参考技术A Computer

A device that receives, processes, and presents information. The two basic types of computers are analog and digital.

Although generally not regarded as such, the most prevalent computer is the simple mechanical analog computer, in which

gears, levers, ratchets, and pawls perform mathematical operations—for example, the speedometer and the watt-hour meter

(used to measure accumulated electrical usage). The general public has become much more aware of the digital computer with

the rapid proliferation of the hand-held calculator and a large variety of intelligent devices and especially with exposure

to the Internet and the World Wide Web. See also Calculators; Internet; World Wide Web.

An analog computer uses inputs that are proportional to the instantaneous value of variable quantities, combines these inputs

in a predetermined way, and produces outputs that are a continuously varying function of the inputs and the processing. These

outputs are then displayed or connected to another device to cause action, as in the case of a speed governor or other

control device. Small electronic analog computers are frequently used as components in control systems. If the analog

computer is built solely for one purpose, it is termed a special-purpose electronic analog computer. In any analog computer

the key concepts involve special versus general-purpose computer designs, and the technology utilized to construct the

computer itself, mechanical or electronic. See also Analog computer.

In contrast, a digital computer uses symbolic representations of its variables. The arithmetic unit is constructed to follow

the rules of one (or more) number systems. Further, the digital computer uses individual discrete states to represent the

digits of the number system chosen. A digital computer can easily store and manipulate numbers, letters, images, sounds, or

graphical information represented by a symbolic code. Through the use of the stored program, the digital computer achieves a

degree of flexibility unequaled by any other computing or data-processing device.

The advent of the relatively inexpensive and readily available personal computer, and the combination of the computer and

communications, such as by the use of networks, have dramatically expanded computer applications. The most common application

now is probably text and word processing, followed by electronic mail. See also Electronic mail; Local-area networks;

Microcomputer; Word processing.

Computers have begun to meet the barrier imposed by the speed of light in achieving higher speeds. This has led to research

and development in the areas of parallel computers (in order to accomplish more in parallel rather than by serial

computation) and distributed computers (taking advantage of network connections to spread the work around, thus achieving

more parallelism). Continuing demand for more processing power has led to significant changes in computer hardware and

software architectures, both to increase the speed of basic operations and to reduce the overall processing time. See also

Computer systems architecture; Concurrent processing; Distributed systems (computers); Multiprocessing; Supercomputer.

PC (Personal Computer)

PC is any laptop or desktop computer such as a Windows machine or a Macintosh.

In contrast to the more generic definition above, PC typically refers to an x86-based desktop or laptop computer, almost all

of which run under Windows. PC hardware and operating systems are primarily governed by Intel and Microsoft; however, there

are numerous other strong influences. The PC represents the world's largest computer base. More than a billion of them are

connected to the Internet, with shipments of new PCs exceeding a quarter million units per year.
PCs are sold by large vendors such as Dell and HP, as well as by thousands of small and large computer dealers who assemble

them from standard parts. Ironically, IBM launched the PC in 1981 and exited the business in 2004, selling its PC division to

Chinese-based Lenovo.

PC Clients and Servers

The term PC typically refers to the user's desktop or laptop computer, which is called a "client" machine. However, x86-based

machines are also widely used for servers, running server versions of Windows such as Windows 2000 and Windows Server, as

well as Linux, Unix and other operating systems. See x86-based system.

The IBM PC

IBM launched the PC in 1981, and competitors immediately tried to create PC clones. Except for Compaq, most attempts failed

until 1985, when the BIOS chip in the PC was successfully cloned and made available to others. From then on, true compatibles

were made by numerous vendors, and the PC industry was established.

In the 1980s, it was a personal computer. In the 1990s, it became a powerful controversy.

The innocent initials PC, which at various times have signified per cent, post card, and propositional calculus, have been

widely used for personal computer (1977) ever since IBM introduced the IBM PC early in the 1980s. The abbreviation PC (1978)

has largely displaced personal computer as the standard term, and both have made the former name microcomputer (1971) nearly

obsolete.

Meanwhile, however, in the long-running policy clash in politics and culture between left and right, liberal and

conservative, PC has become a booby-trapped label for politically correct attitudes that liberals advocate as sensitive and

conservatives condemn as overly euphemistic. Should we be sensitive to every possible instance of -isms like racism (1936),

Sexism (1969), and heightism (prejudice against short people), for example? Should our schools be Multicultural (1941)?

Should we use the term chair instead of chairman, and first-year student instead of freshman? Are healthy people just

temporarily abled? The extremes get silly, but the questions have serious implications for the body politic and our own

lives.

Sherlock Holmes, Fictional Detective

Born: 1887
Birthplace: Fiction
Best Known As: The most famous detective in English literature
Sherlock Holmes is the fictional creation of Sir Arthur Conan Doyle, who wrote about the detective in a series of 60 stories

published between 1887 and 1927. Holmes was famous for his extra-keen powers of observation and deduction, which he used to

solve perplexing crimes and mysteries. He operated from his flat at 221b Baker Street in London, assisted by his friend Dr.

Watson. The nefarious criminal Professor Moriarty appears as Holmes's antagonist in some of the tales. Sherlock Holmes was an

immediate hit in Doyle's day and remains so popular that he is sometimes mistaken for a real historical figure. Among the

most famous Holmes stories are A Study in Scarlet (the first Sherlock Holmes story, 1887) and The Hound of the Baskervilles

(1902).

Holmes was played by actor Basil Rathbone in a popular series of movies from 1939-46. In the 1980s and 1990s Holmes was

portrayed on television by Jeremy Brett... Holmes has an older brother, Mycroft, who appears in a few of the stories. Mycroft

has powers of deduction which are supposedly even greater than Sherlock's, but lacks the energy to pursue them.

Sherlock Holmes is a fictional detective of the late 19th and early 20th centuries who made his first published appearance in

1887. He was devised by Scottish author and physician Sir Arthur Conan Doyle. Holmes is famous for his prowess at using logic

and astute observation to solve cases. He is perhaps the most famous fictional detective, and indeed one of the best known

and universally recognisable literary characters.

Conan Doyle wrote four novels and fifty-six short-stories featuring his creation. Almost all were narrated by Holmes' friend

and biographer, Dr. John H. Watson, with the exception of two narrated by Holmes himself and two more written in the third

person. The stories first appeared in magazine serialisation, notably in The Strand, over a period of forty years. This was a

common form of publication at the time: Charles Dickens' works were issued in a similar fashion. The stories cover a period

from around 1878 up to 1903, with a final case in 1914. They are read as much for their characterisation and the stylised

late-Victorian world in which they take place as for the mysteries themselves.

More actors have portrayed Sherlock Holmes than any other character, and by 1964, according to a report in The Times, the

worldwide sales of the stories were running second only to the Bible[citation needed].

Overview
Sherlock Holmes described himself as a "consulting detective," an expert brought into cases too difficult for other

(typically official) investigators; we are told that he can often solve a problem without leaving his home. Naturally, this

aspect is minimized in the stories, which tend to focus on the more interesting cases that require actual legwork. He

specializes in solving unusual cases using his extraordinary powers of observation and logical reasoning, and frequently

demonstrates these abilities to new clients by making on-the-spot deductions about their personalities and recent activities.

This simple marketing strategy rarely fails to impress and build confidence in his services (see below).

Sir Arthur Conan Doyle credited the conception of Holmes to his teacher at the medical school of Edinburgh University, the

gifted surgeon and forensic detective, Joseph Bell (forensic science being a relatively new field at the time). However, some

years later Bell wrote to Conan Doyle, "You are yourself Sherlock Holmes and well you know it" (Baring-Gould, p. 8). Holmes

was named after Oliver Wendell Holmes, whom Conan Doyle admired, and an English cricketer named Sherlock — however, some

early notes give his name as Sherrinford Holmes and Shelling Ford.