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光(guang)照(zhao)培養箱是具有光(guang)照(zhao)功能的(de)(de)高(gao)精度恒溫(wen)設備，通過(guo)(guo)模擬植(zhi)物光(guang)照(zhao)條(tiao)件(jian)，讓植(zhi)物有良好的(de)(de)生長(chang)條(tiao)件(jian)，還可用于(yu)各類恒溫(wen)光(guang)照(zhao)培養、干燥、熱(re)處理實(shi)驗，是植(zhi)物栽培、種(zhong)子發芽(ya)、育苗實(shi)驗、小(xiao)動物、昆(kun)蟲等(deng)研究的(de)(de)理想試驗設備。注意事項：1、本產(chan)品(pin)搬運過(guo)(guo)程中(zhong)，禁止倒置或(huo)傾斜大于(yu)45度。2、在使(shi)用過(guo)(guo)程中(zhong)不(bu)要頻繁(fan)設定溫(wen)度、濕度以免壓縮(suo)機頻繁(fan)啟動造(zao)成過(guo)(guo)載(zai)影響壽命。3、本產(chan)品(pin)有熱(re)電(dian)阻(zu)短路(lu)、斷路(lu)保護(hu)。當(dang)熱(re)電(dian)阻(zu)短路(lu)或(huo)斷路(lu)時，本機自(zi)動停止加熱(re)或(huo)制(zhi)冷。4、箱體內(nei)培養物品(pin)不(bu)宜存放太多，擺放應留有間隙(xi)，利于(yu)箱體內(nei)空氣循環(huan)。5...

電(dian)(dian)(dian)(dian)導(dao)(dao)(dao)(dao)率(lv)(lv)(lv)傳(chuan)感(gan)(gan)器(qi)是在(zai)實驗室、工業生(sheng)產和探測(ce)領域里被用(yong)來測(ce)量(liang)超(chao)(chao)純(chun)水、純(chun)水、飲用(yong)水、污水等各種溶液的電(dian)(dian)(dian)(dian)導(dao)(dao)(dao)(dao)性或(huo)水標本整體離子的濃度(du)的傳(chuan)感(gan)(gan)器(qi)。根(gen)據(ju)測(ce)量(liang)原理與方(fang)法的不同可以分為(wei)(wei)電(dian)(dian)(dian)(dian)極(ji)型(xing)電(dian)(dian)(dian)(dian)導(dao)(dao)(dao)(dao)率(lv)(lv)(lv)傳(chuan)感(gan)(gan)器(qi)、電(dian)(dian)(dian)(dian)感(gan)(gan)型(xing)電(dian)(dian)(dian)(dian)導(dao)(dao)(dao)(dao)率(lv)(lv)(lv)傳(chuan)感(gan)(gan)器(qi)以及超(chao)(chao)聲波電(dian)(dian)(dian)(dian)導(dao)(dao)(dao)(dao)率(lv)(lv)(lv)傳(chuan)感(gan)(gan)器(qi)。電(dian)(dian)(dian)(dian)極(ji)型(xing)電(dian)(dian)(dian)(dian)導(dao)(dao)(dao)(dao)率(lv)(lv)(lv)傳(chuan)感(gan)(gan)器(qi)根(gen)據(ju)電(dian)(dian)(dian)(dian)解導(dao)(dao)(dao)(dao)電(dian)(dian)(dian)(dian)原理采用(yong)電(dian)(dian)(dian)(dian)阻測(ce)量(liang)法。對電(dian)(dian)(dian)(dian)導(dao)(dao)(dao)(dao)率(lv)(lv)(lv)實現測(ce)量(liang)，其電(dian)(dian)(dian)(dian)導(dao)(dao)(dao)(dao)測(ce)量(liang)電(dian)(dian)(dian)(dian)極(ji)在(zai)測(ce)量(liang)過程中(zhong)表現為(wei)(wei)一個復雜的電(dian)(dian)(dian)(dian)化(hua)(hua)學系(xi)統；電(dian)(dian)(dian)(dian)感(gan)(gan)型(xing)電(dian)(dian)(dian)(dian)導(dao)(dao)(dao)(dao)率(lv)(lv)(lv)傳(chuan)感(gan)(gan)器(qi)依據(ju)電(dian)(dian)(dian)(dian)磁感(gan)(gan)應原理實現對液體電(dian)(dian)(dian)(dian)導(dao)(dao)(dao)(dao)率(lv)(lv)(lv)的測(ce)量(liang)；超(chao)(chao)聲波電(dian)(dian)(dian)(dian)導(dao)(dao)(dao)(dao)率(lv)(lv)(lv)傳(chuan)感(gan)(gan)器(qi)根(gen)據(ju)超(chao)(chao)聲波在(zai)液體中(zhong)變化(hua)(hua)對電(dian)(dian)(dian)(dian)導(dao)(dao)(dao)(dao)率(lv)(lv)(lv)進行測(ce)量(liang)，其中(zhong)以前2種傳(chuan)感(gan)(gan)器(qi)...

凱氏定(ding)(ding)氮(dan)(dan)(dan)儀(yi)是(shi)(shi)一種(zhong)全自(zi)動的(de)(de)(de)(de)蛋白質(zhi)分析儀(yi)，可(ke)(ke)以根據蛋白質(zhi)中氮(dan)(dan)(dan)的(de)(de)(de)(de)含(han)量(liang)(liang)(liang)恒定(ding)(ding)的(de)(de)(de)(de)原理，通(tong)過測(ce)(ce)定(ding)(ding)樣(yang)(yang)品(pin)中氮(dan)(dan)(dan)的(de)(de)(de)(de)含(han)量(liang)(liang)(liang)從(cong)而(er)計算蛋白質(zhi)含(han)量(liang)(liang)(liang)，是(shi)(shi)食(shi)品(pin)分析實驗(yan)所需的(de)(de)(de)(de)儀(yi)器(qi)設備(bei)。凱氏定(ding)(ding)氮(dan)(dan)(dan)儀(yi)的(de)(de)(de)(de)使用(yong)(yong)，能夠快速(su)測(ce)(ce)定(ding)(ding)樣(yang)(yang)品(pin)的(de)(de)(de)(de)氮(dan)(dan)(dan)含(han)量(liang)(liang)(liang)，配以相應(ying)的(de)(de)(de)(de)措施可(ke)(ke)以有效控制氮(dan)(dan)(dan)含(han)量(liang)(liang)(liang)：測(ce)(ce)定(ding)(ding)土壤中的(de)(de)(de)(de)氮(dan)(dan)(dan)含(han)量(liang)(liang)(liang)，可(ke)(ke)以直接其是(shi)(shi)否(fou)缺少(shao)氮(dan)(dan)(dan)含(han)量(liang)(liang)(liang)，是(shi)(shi)否(fou)超(chao)標。氮(dan)(dan)(dan)含(han)量(liang)(liang)(liang)缺少(shao)，可(ke)(ke)以使用(yong)(yong)氮(dan)(dan)(dan)肥(fei)(fei)提高土壤氮(dan)(dan)(dan)含(han)量(liang)(liang)(liang)，反之可(ke)(ke)以減少(shao)氮(dan)(dan)(dan)肥(fei)(fei)的(de)(de)(de)(de)使用(yong)(yong)。這(zhe)樣(yang)(yang)能夠提高氮(dan)(dan)(dan)肥(fei)(fei)的(de)(de)(de)(de)利用(yong)(yong)率，減少(shao)氮(dan)(dan)(dan)肥(fei)(fei)對(dui)環(huan)境(jing)的(de)(de)(de)(de)污染。減少(shao)氮(dan)(dan)(dan)肥(fei)(fei)的(de)(de)(de)(de)開支。除此之外還(huan)可(ke)(ke)以用(yong)(yong)于(yu)監測(ce)(ce)食(shi)品(pin)安(an)全，防止不良食(shi)品(pin)流入市場。下面一起來了解一下...

渦(wo)度(du)(du)(du)(du)(du)是(shi)流(liu)(liu)體(ti)力(li)學中的(de)(de)(de)(de)一個重要概念，用來(lai)(lai)描述流(liu)(liu)體(ti)運(yun)動中的(de)(de)(de)(de)旋(xuan)轉(zhuan)(zhuan)性(xing)質。渦(wo)度(du)(du)(du)(du)(du)通(tong)常(chang)用矢(shi)量的(de)(de)(de)(de)旋(xuan)度(du)(du)(du)(du)(du)來(lai)(lai)表(biao)示，是(shi)流(liu)(liu)體(ti)速(su)度(du)(du)(du)(du)(du)場的(de)(de)(de)(de)旋(xuan)轉(zhuan)(zhuan)性(xing)質的(de)(de)(de)(de)度(du)(du)(du)(du)(du)量。在流(liu)(liu)體(ti)力(li)學中，流(liu)(liu)體(ti)的(de)(de)(de)(de)速(su)度(du)(du)(du)(du)(du)可(ke)以被看作是(shi)一個矢(shi)量場，即(ji)在任意一點上(shang)給出(chu)流(liu)(liu)體(ti)速(su)度(du)(du)(du)(du)(du)大小和(he)方向(xiang)的(de)(de)(de)(de)矢(shi)量。如果(guo)一個流(liu)(liu)體(ti)流(liu)(liu)場在某一點上(shang)具(ju)有旋(xuan)轉(zhuan)(zhuan)的(de)(de)(de)(de)趨勢，也就是(shi)說，流(liu)(liu)體(ti)在該點上(shang)存在旋(xuan)轉(zhuan)(zhuan)運(yun)動，那么(me)我們(men)可(ke)以用渦(wo)度(du)(du)(du)(du)(du)來(lai)(lai)描述這個旋(xuan)轉(zhuan)(zhuan)的(de)(de)(de)(de)程(cheng)度(du)(du)(du)(du)(du)。渦(wo)度(du)(du)(du)(du)(du)由(you)速(su)度(du)(du)(du)(du)(du)場的(de)(de)(de)(de)旋(xuan)度(du)(du)(du)(du)(du)來(lai)(lai)定(ding)義，旋(xuan)度(du)(du)(du)(du)(du)是(shi)速(su)度(du)(du)(du)(du)(du)場的(de)(de)(de)(de)矢(shi)量運(yun)算，表(biao)示速(su)度(du)(du)(du)(du)(du)場旋(xuan)轉(zhuan)(zhuan)的(de)(de)(de)(de)程(cheng)度(du)(du)(du)(du)(du)和(he)方向(xiang)。渦(wo)度(du)(du)(du)(du)(du)的(de)(de)(de)(de)大小與速(su)度(du)(du)(du)(du)(du)場旋(xuan)轉(zhuan)(zhuan)的(de)(de)(de)(de)強(qiang)度(du)(du)(du)(du)(du)成正(zheng)比，旋(xuan)度(du)(du)(du)(du)(du)的(de)(de)(de)(de)方向(xiang)與旋(xuan)轉(zhuan)(zhuan)軸垂(chui)直，并與轉(zhuan)(zhuan)動方向(xiang)...

植(zhi)(zhi)(zhi)(zhi)(zhi)物(wu)冠(guan)(guan)層(ceng)(ceng)(ceng)主要表明(ming)了(le)葉層(ceng)(ceng)(ceng)的(de)(de)(de)發布狀(zhuang)況，不同種類的(de)(de)(de)植(zhi)(zhi)(zhi)(zhi)(zhi)物(wu)冠(guan)(guan)層(ceng)(ceng)(ceng)的(de)(de)(de)分(fen)布是(shi)不一(yi)樣(yang)，植(zhi)(zhi)(zhi)(zhi)(zhi)物(wu)冠(guan)(guan)層(ceng)(ceng)(ceng)可以影響植(zhi)(zhi)(zhi)(zhi)(zhi)物(wu)的(de)(de)(de)光(guang)合(he)作(zuo)(zuo)用(yong)(yong)，我們知道光(guang)合(he)作(zuo)(zuo)用(yong)(yong)對于植(zhi)(zhi)(zhi)(zhi)(zhi)物(wu)的(de)(de)(de)作(zuo)(zuo)用(yong)(yong)是(shi)非常(chang)大的(de)(de)(de)，所(suo)以想要植(zhi)(zhi)(zhi)(zhi)(zhi)物(wu)生(sheng)長好，就需要了(le)解植(zhi)(zhi)(zhi)(zhi)(zhi)物(wu)的(de)(de)(de)冠(guan)(guan)層(ceng)(ceng)(ceng)。植(zhi)(zhi)(zhi)(zhi)(zhi)物(wu)冠(guan)(guan)層(ceng)(ceng)(ceng)分(fen)析(xi)儀(yi)是(shi)一(yi)種植(zhi)(zhi)(zhi)(zhi)(zhi)物(wu)分(fen)析(xi)儀(yi)器，廣泛應用(yong)(yong)于農業生(sheng)產和農業科研，為進行冠(guan)(guan)層(ceng)(ceng)(ceng)光(guang)能資源調(diao)查(cha)，測量(liang)植(zhi)(zhi)(zhi)(zhi)(zhi)物(wu)冠(guan)(guan)層(ceng)(ceng)(ceng)中光(guang)線的(de)(de)(de)攔截，研究(jiu)作(zuo)(zuo)物(wu)的(de)(de)(de)生(sheng)長發育(yu)、產量(liang)品質與光(guang)能利(li)用(yong)(yong)間的(de)(de)(de)關系，儀(yi)器用(yong)(yong)于400nm－700nm波段(duan)內的(de)(de)(de)光(guang)合(he)有效輻射（PAR）測量(liang)、記錄(lu),測量(liang)值的(de)(de)(de)單位是(shi)平(ping)方(fang)米·秒上(shang)的(de)(de)(de)微摩爾（μmols-1m-2）。植(zhi)(zhi)(zhi)(zhi)(zhi)...

氣(qi)(qi)孔(kong)(kong)計是(shi)一(yi)種(zhong)(zhong)用于(yu)(yu)測量(liang)材料(liao)(liao)(liao)中(zhong)(zhong)氣(qi)(qi)孔(kong)(kong)數(shu)量(liang)和(he)(he)(he)大(da)小(xiao)的(de)儀器(qi)。氣(qi)(qi)孔(kong)(kong)是(shi)一(yi)種(zhong)(zhong)空隙或孔(kong)(kong)隙，可以存(cun)在(zai)于(yu)(yu)各種(zhong)(zhong)材料(liao)(liao)(liao)中(zhong)(zhong)，如(ru)金(jin)(jin)屬(shu)、陶瓷(ci)和(he)(he)(he)塑料(liao)(liao)(liao)等。了解(jie)氣(qi)(qi)孔(kong)(kong)的(de)數(shu)量(liang)和(he)(he)(he)大(da)小(xiao)對于(yu)(yu)確定材料(liao)(liao)(liao)的(de)質(zhi)量(liang)和(he)(he)(he)性(xing)能至(zhi)關重要。氣(qi)(qi)孔(kong)(kong)計是(shi)一(yi)種(zhong)(zhong)先進的(de)儀器(qi)設(she)備(bei)，用于(yu)(yu)測量(liang)材料(liao)(liao)(liao)中(zhong)(zhong)的(de)氣(qi)(qi)孔(kong)(kong)數(shu)量(liang)和(he)(he)(he)大(da)小(xiao)。在(zai)眾多的(de)材料(liao)(liao)(liao)中(zhong)(zhong)，氣(qi)(qi)孔(kong)(kong)是(shi)經(jing)常出(chu)現的(de)一(yi)種(zhong)(zhong)結構特征。無(wu)論是(shi)金(jin)(jin)屬(shu)、陶瓷(ci)還(huan)是(shi)塑料(liao)(liao)(liao)等材料(liao)(liao)(liao)，都(dou)可能存(cun)在(zai)不(bu)同大(da)小(xiao)、形狀和(he)(he)(he)分布的(de)氣(qi)(qi)孔(kong)(kong)。然而，氣(qi)(qi)孔(kong)(kong)對材料(liao)(liao)(liao)的(de)性(xing)能和(he)(he)(he)質(zhi)量(liang)有著重要的(de)影響(xiang)。氣(qi)(qi)孔(kong)(kong)計的(de)工作原理基于(yu)(yu)氣(qi)(qi)孔(kong)(kong)對聲波傳播(bo)的(de)影響(xiang)。當聲波通過材料(liao)(liao)(liao)中(zhong)(zhong)的(de)氣(qi)(qi)孔(kong)(kong)時(shi)，會發生(sheng)散(san)射和(he)(he)(he)吸收(shou)現象。通...

水(shui)分(fen)是(shi)天然(ran)土(tu)壤(rang)的一個重要(yao)組成部分(fen)，它不僅影響到土(tu)壤(rang)的物理(li)(li)性質，制約著土(tu)壤(rang)中養分(fen)的溶解、轉(zhuan)移和微生(sheng)(sheng)物的活動，而(er)且(qie)，是(shi)構成土(tu)壤(rang)肥(fei)力(li)的一個重要(yao)因(yin)素，更是(shi)一切植(zhi)物賴以(yi)生(sheng)(sheng)存的基(ji)本(ben)條(tiao)件。因(yin)此，測定土(tu)壤(rang)含水(shui)量(liang)(liang)，對實施精準農業(ye)，節水(shui)灌(guan)(guan)溉，提高農業(ye)生(sheng)(sheng)產(chan)效率有重要(yao)的意義。土(tu)壤(rang)水(shui)勢傳(chuan)感器可以(yi)很方便地插入到土(tu)壤(rang)剖面坑(keng)中，在其周圍包(bao)裹上濕土(tu)即可。測定和記錄非常簡單(dan)。免維(wei)護(hu)、無(wu)需(xu)校準即可測量(liang)(liang)較大(da)范(fan)圍的土(tu)壤(rang)水(shui)勢；無(wu)需(xu)灌(guan)(guan)水(shui)，大(da)量(liang)(liang)程使得它成為測量(liang)(liang)自然(ran)系統(tong)水(shui)勢的理(li)(li)想傳(chuan)感器，特別是(shi)張力(li)計(ji)無(wu)法測量(liang)(liang)的氣(qi)穴。工作原理(li)(li)如...