Evaluation about career
Evaluation about career, Total:247 items.
The international standard classification for "Evaluation about career" includes: Other services , Occupational safety. Industrial hygiene , Transport by water , Radiation protection , Noise with respect to human beings , Geology. Meteorology. Hydrology , Education .
The Chinese standard classification for "Evaluation about career" includes: Comprehensive Technology , Labor sanitation , Industrial dust and gas prevention technology , Hygiene, safety and labor protection , Diving and its physiological condition , Radiation protection detection and evaluation , Acoustic Measurement , Diagnostic standard for occupational diseases , Hygiene, safety and labor protection , Meteorology .
Group Standards of the People's Republic of China
- T/SDAPE 00009-2020 Equipment Management Maturity (Star) Evaluator Occupational Skill Level Evaluation Specification
- T/SXS 024-2024 Computer software development vocational skills evaluation guide
- T/CICE 01-2019 Professional competence evaluation of commercial vehicle inspection and maintenance
- T/CICE 001-2023 Evaluate of occupational skill level of highway maintenance technical workers
- T/HATSI 0016-2022 Technical specification for green design product assessment–professional clothing
- T/XZY 04-2021 Evaluation Standard For Professional Ability Of Employees Engaged In Micro Intelligent Color Ultrasound
- T/WSJD 24-2022 Quality Control Evaluation Guidelines for Occupational Health Examination
- T/NMB 2-2022 Specification of evaluation for vocational ability of brand professionals
- T/SCPMA 0001-2022 Announcement of the Sichuan Provincial Professional Manager Research Association on the release of the group standard of "Visual Display Professional Qualification Evaluation Standards"
- T/GDESG 01-2023 Evaluation of Professional Skills of ESG Practitioners
- T/ZFCX 1004-2024 Evaluation indicators of technical specifications for customized professional clothing
- T/GDBX 084-2023 Specification for the management and evaluation of vocational trainer in the field of Carbon peak and carbon neutrality
- T/CICE01-2019 Standards for professional competence evaluation of commercial vehicle inspection and maintenance
- T/CADHOH 0003-2023 Specifications for assessing Chinese sign language interpreters
- T/CMBA 010-2020 Specification for evaluating implants intended to regenerate articular cartilage
- T/SHDSGY 038-2023 Guide for vocational skills evaluation in software development
- T/GVS 012-2023 Evaluation specification for professional skills of optical vacuum coating
- T/BEMCA 012-2023 Evaluation Specification for Professional Ability of Enterprise Tax Compliance Practitioners
- T/FJHR 002-2020 Evaluation of professional skill level of nursing staff for the aged
- T/GEIIC 001-2024 Anti-fraud professional skills evaluation standard
- T/GDESG 02-2023 Evaluation of professional skills of online monitoring and control system operators
- T/CRACM 0007-2021 Specification for occupational evaluation of preventive health care professionals
- T/FJCG 001-2022 Group Standards for Bidding Agency Special Occupational Competence Evaluation
- T/PEIAC 019-2022 Occupational evaluation specification for gravure printing machine maintenance workers
- T/PEIAC 020-2022 Occupational evaluation of engineers of digital color management in printing process
- T/CCPITCSC 049-2020 Guidelines for training and assessment of marketer competence
- T/GDYX 01-2018 Professional level evaluation of children dietician
- T/LSMA 001-2024 Standards for evaluating professional skill levels of security administrators
- T/SCQWL 0002-2021 Evaluation Standards for Professional Qualification of Natural History Instructors
- T/CVMA 119-2023 Specification for pet dog training vocational skill assessment
- T/PEIAC 015-2022 Professional evaluation specification for computer-to-plate (CTP) maintenance workers
- T/CABP 002-2022 Standards for evaluating the professional competence of pet breeders
- T/CSTE 0136-2021 Technical specification for green-design product Occupational footwear
- T/PEIAC 016-2022 Professional evaluation specification for paper cutter maintenance workers
- T/PEIAC 014-2022 Inkjet printing machine maintenance worker occupational evaluation specification
- T/SHGAS 001-2021 Jewelry and Jade Live Streaming Occupational Credit Evaluation Specifications
- T/GDCMA 012-2023 Evaluation specifications for Credit professional manager professional ability
- T/CASMES 22-2022 “Building Craftsman” general principles of vocational skill level evaluation
- T/CAGDE 212-2022 Specification for training and evaluation of professional qualification of digital trade (cross-border e-commerce) practitioners
- T/HBZX 001-2021 Evaluation Standards for Professional Ability Level of Professional Managers
- T/GDCMA 005-2022 Standard for evaluation of professional ability of credit mediators
- T/CHA 020-2021 Evaluation Requirements for Vocational Skills of Hotel Receptionists
- T/SMAJA 0003-2020 Professional Standards for Practitioners of Engineering Consulting Parallel Evaluation Service
- T/CABP 003-2022 Meikang Digital Store Manager Occupational Competence Evaluation Standards
- T/CVMA 117-2023 Specification for vocational skills of pet clinical diagnosis and treatment-Assistant veterinarian
- T/CCIAT 0049-2023 Evaluation standard for professional ability of construction labor team leader
- T/GDYX 03-2019 Professional level evaluation of chronic disease administrator
- T/SCPMA 0001-2021 Evaluation Standards for Professional Qualification of Natural History Instructors
- T/CFCA 0007-2019 Evaluation index of professional managers in food industry
- T/CHA 008-2020 Specification for Evaluation of Special Vocational Skills for Catering Management
- T/CHA 004-2019 Basic Requirements and Evaluation of Referees in Vocational Skills Competition in Hotel and Catering Industry
- T/CHA 028-2022 Grade Evaluation Conditions for Professional Managers of Hotel Industry
- T/CNTAC 37-2019 "The Vocational Qualification Criterion of Nonwovens Worker "
- T/PEIAC 018-2022 Occupational Evaluation Specifications for Inkjet Printing Machine Setup and Adjustment Workers
- T/CVMA 123-2023 Specification for vocational skills of pet clinical nutritionist
- T/FJTA 001-2020 Evaluation of professional skill level of enterprise trainer
- T/CCA 023-2021 Specifications for professional ability evaluation of group meal project managers
- T/FJCG 003-2022 Group Standards for the Evaluation of Professional Competence Levels for Bidding and Purchasing Engineers
- T/ZJJX 003-2023 Code for management of medical caregiver in domestic service institutions
- T/CQAE 13006-2022 Standards for professional competence evaluation of quality management engineering practitioners
- T/CEEAS 004-2021 Evaluation criteria for professional skills of corporate compliance professional
- T/CCOEA 3-2020 Specification for skill level assessment of office equipment maintain and service worker
- T/PEIAC 017-2022 Occupational evaluation specification for electrical maintenance workers of printing equipment
- T/CEEAS 003-2024 Elderly care compliance practioner occupational skills evaluation criteria
- T/FJTA 002-2022 Group Standards for Vocational Ability Level Evaluation of Vocational Trainers
- T/TCYCYPR 010-2023 Hebei Province catering industry outstanding entrepreneur excellent professional manager excellent chef evaluation standard
- T/GDYLSH 3-2022 Standards for the evaluation of professional skills of nursing staff for the elderly
- T/FJHR 001-2020 Evaluation of professional skill level of human resource managers in Enterprises
- T/CVMA 120-2023 Specification for assessment of occupational skill levels for biosafety control in chicken farms
- T/CVMA 118-2023 Specification for pet grooming and care vocational skill assessment
- T/CTES 1060-2023 Technical Specifications for Classification and Evaluation of Professional Fashion
- T/PPZL 020-2023 Brand Evaluation Standards for Private Vocational Skills Training Schools in Inner Mongolia
- T/QGCML 4187-2024 Standards for the professional competency evaluation of family nutritionists
- T/SCQWL 0001-2021 Evaluation Standards for Professional Qualification of Social Art Education Teachers
- T/HFDA 1003-2022 Evaluation Standards for Professional Ability of Financial Counselors
- T/CASME 611-2023 Evaluation specifications of professional skill level of special guardians
- T/CCUA 007-2020 Professional skills evaluation of information system auditors
- T/GDYX 02-2019 Professional level evaluation of weight administrator
- T/GDHR 9-2024 Career Development Planner Competency Assessment Specification
- T/LSMA 001-2023 Evaluation Specifications for Professional Skill Levels of Security Administrators
- T/CRACM 0007-2022 Standard for occupational evaluation of preventive health care professionals
- T/CIQA 59-2023 Specifications on professional training and evaluation for new media live streaming
- T/PEIAC 009-2021 Occupational evaluation of Additive manufacturing technicist
- T/LXLY 0004-2020 Evaluation guideline for professional ability of dietitian for elderly people
- T/CABP 004-2022 Standards for evaluating the professional competence level of dietary coaches
- T/LZSH 0003-2022 Announcement on publishing the group standards of the "Code for the Evaluation of the Construction of Clean and Honest Private Enterprises"
- T/GBA 0107-2022 Standards for evaluation of professional skills of employees in prefabricated interior engineering of green hotels
- T/PEIAC 007-2021 Occupational evaluation specification for perfect binding line equipment maintenance workers
- T/HBFPIA 007-2022 Evaluation specification for professional skill level of food packaging safety manager
- T/CAH 0202-2020 Specification for occupational skill of central air conditioning cleaner
- T/GDYX 04-2018 Professional level evaluation of mother and baby dietician
- T/JNWYXH 3-2023 Evaluation specification for professional ability of property service project manager
- T/CHA 010-2020 Requirement for the Evaluation of Group Catering Professional Managers
- T/FJCG 002-2022 Bidding Practice Special Occupational Competence Evaluation Group Standards
- T/PEIAC 008-2021 Occupational evaluation of machine vision system technicist
Occupational Health Standard of the People's Republic of China
- GBZ/T 277-2016 General principles for assessment of occupational hazard
- GBZ/T 197-2007 Technical guidelines for effect-assessment for occupational hazard control in construction project
- GBZ/T 196-2007 Technical guidelines for pre-assessment for occupational hazard in construction project
- GBZ/T(卫生) 277-2016 General principles for assessment of occupational hazard
Professional Standard-Safe Production
- AQ/T 4267-2015 Guidelines for effect-assessment of occupational hazards control in construction project of wooden furniture manufacturer
- AQ/T 4259-2015 Rules of occupational hazard pre-assessment for construction project of asbestos mine
- AQ/T 8010-2013 Guidelines for Effect-assessment for Control of Occupational Hazard in Construction Project
- AQ/T 8008-2013 General Principles for Assessment of Occupational Hazards
- AQ/T 4263-2015 Rules of occupational hazard status quo assessment for asbestos products enterprises
- AQ/T 4264-2015 Rules of occupational hazard pre-assessment for construction project of asbestos products enterprises
- AQ/T 4261-2015 Rules of occupational hazard status quo assessment for asbestos mine
- AQ/T 4260-2015 Rules of effect-assessment on occupational hazard control in construction project of asbestos mine
- AQ/T 4270-2015 Technical guidelines for status quo assessment of occupational hazard of the employing unit
- AQ/T 4280-2016 Codes for effect-assessment for occupational hazard control in construction project of thermal power enterprises
- AQ/T 8009-2013 Guidelines for Pre-assessment of Occupational Hazard in Construction Project
- AQ/T 4262-2015 Rules of effect-assessment on occupational hazard control in construction project of asbestos products enterprises
- AQ/T 4265-2015 Guidelines for pre-assessment of occupational hazards in wooden furniture manufacturer
- AQ/T 4266-2015 Guidelines for status quo assessment of occupational hazards in wooden furniture manufacturer
Jilin Provincial Standard of the People's Republic of China
- DB22/T 2064-2014 Regulations for detection and evaluation of occupational disease hazard factors in shell mold casting process
- DB22/T 1557-2012 Occupational Health Examination Evaluation Specifications
- DB22/T 92-2012 Detection and Evaluation of Occupational Hazardous Factors in the Workplace
- DB22/T 1559-2012 Guidelines for the detection and evaluation of occupational hazard factors in aromatics production facilities
- DB22/T 3050-2019 Radiation diagnosis and treatment construction project radioactive occupational hazard assessment specification
Beijing Provincial Standard of the People's Republic of China
- DB11/T 1574-2018 Public job introduction and public job guidance service evaluation norms
- DB11/T 1324-2016 Standards for evaluation of radiation protection against occupational hazards in radiological diagnosis and treatment construction projects
- DB11/T 1193-2015 Guidelines for evaluating the status quo of occupational hazards in employers
- DB11/T 2139-2023 Professional credit evaluation standards guide
Professional Standard - Traffic
- JT/T 442-2001 Appraisal way of automobile driving suitability test
- JT/T 1101-2016 Evaluation of mental health for commercial divers
Professional Standard-Ships
- CB/T 3745-1995 Comprehensive Evaluation and Classification of Occupational Hazard Levels
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
- GB/T 14366-1993 - Determination of occupational noise exposure and estimation of noise - Induced hearing impairment
- GB/T 24557-2009 Methods and evaluation for psychological selection of commercial divers
- GB/T 31864-2016 Index for credit evaluation of professional manager
- GB/T 42292-2022 Occupational exposure dose assessment of pressurized water reactor nuclear power plant
Shanxi Provincial Standard of the People's Republic of China
- DB14/T 2294-2021 Requirements and evaluation of production skills for professional tractor operators
- DB14/T 1835-2019 Cattle breeding professional farmers production skills requirements and evaluation
- DB14/T 1939.6-2019 Shanxi Vocational Skills Training Specification Part 6: Ability Evaluation
- DB1409/T 3.4-2020 Xinzhou Yuesao Vocational Skill Level Evaluation Rules
- DB14/T 1829-2019 Requirements and Evaluation of Production Skills of Rapeseed Professional Farmers
- DB14/T 1825-2019 Requirements and Evaluation of Production Skills of Professional Farmers in Wheat Planting
- DB14/T 1971-2019 Skill Requirements and Evaluation of Potato Planting Professional Farmers
- DB14/T 1975-2019 Skill Requirements and Evaluation of Beekeeping Professional Farmers
- DB14/T 2297-2021 Skill Requirements and Evaluation of Professional Operators of Corn Combine Harvesters
- DB14/T 1976-2019 Skill Requirements and Evaluation of Donkey Breeding Professional Farmers
- DB14/T 1837-2019 Requirements and Evaluation of Production Skills of Professional Farmers in Grass Planting
- DB14/T 1828-2019 Requirements and Evaluation of Oat Planting Professional Farmers' Production Skills
- DB14/T 1973-2019 Skill requirements and evaluation of walnut cultivation professional farmers
- DB14/T 1830-2019 Production Skill Requirements and Evaluation of Vegetable Planting Professional Farmers
- DB14/T 1831-2019 Production Skill Requirements and Evaluation of Fruit Tree Planting Professional Farmers
- DB14/T 1972-2019 Skill Requirements and Evaluation of Jujube Cultivation Professional Farmers
- DB14/T 1834-2019 Production Skill Requirements and Evaluation of Poultry Breeding Professional Farmers
- DB14/T 1832-2019 Requirements and evaluation of production skills of professional farmers in planting Chinese herbal medicines
- DB14/T 2295-2021 Production Skill Requirements and Evaluation of Agricultural UAV Professional Pilots
- DB14/T 1040-2015 Occupational Hazard Status Evaluation Standards
- DB14/T 1833-2019 Production Skill Requirements and Evaluation of Professional Farmers in Pig Breeding
- DB14/T 1836-2019 Production Skill Requirements and Evaluation of Sheep Breeding Professional Farmers
- DB14/T 1827-2019 Production Skill Requirements and Evaluation of Millet Planting Professional Farmers
- DB14/T 1974-2019 Skill Requirements and Evaluation of Edible Fungi Cultivation Professional Farmers
- DB14/T 1970-2019 Skill requirements and evaluation of bean planting professional farmers
- DB14/T 1826-2019 Requirements and Evaluation of Production Skills of Corn Planting Professional Farmers
- DB14/T 2296-2021 Skill Requirements and Evaluation of Grain Combine Harvester Professional Operators
Henan Provincial Standard of the People's Republic of China
- DB41/T 781-2013 Technical Guidelines for Assessment of Occupational Hazard Status
Shanghai Provincial Standard of the People's Republic of China
- DB31/T 679-2013 Essential elements of assessment of occupational hazard in construction project
- DB31/T 841-2014 Technical Guidelines for Employer Occupational Hazard Status Assessment
Guangdong Provincial Standard of the People's Republic of China
- DB44/T 2509-2024 Guidelines for the preparation of professional skill level evaluation specifications
Guizhou Provincial Standard of the People's Republic of China
- DB52/T 1506-2020 Standards for evaluating the status quo of occupational hazards in coal mine workplaces
Professional Standard - Nuclear Industry
- EJ/T 20060-2014 Format and contents for evaluation report on occupational hazards of construction projects in uranium mining and milling
- EJ/T 1177-2005 Assessment for Internal exposure of uranium workers
Anhui Provincial Standard of the People's Republic of China
- DB34/T 2752-2016 Guidelines for evaluating the status quo of occupational hazards in employers
- DB34/T 2750.3-2016 Guidelines for the Evaluation of Safety and Occupational Hazards in the Field of Hazardous Chemicals Part 3: Evaluation of the Current Situation of Hazardous Chemical Enterprises
- DB34/T 2750.1-2016 Guidelines for Safety and Occupational Hazard Assessment in the Field of Hazardous Chemicals Part 1: Pre-assessment of Construction Projects
Tianjin Provincial Standard of the People's Republic of China
- DB12/T 800-2018 Quality Control Specifications for Occupational Hazard Assessment Process
- DB12/T 881-2019 Technical Guidelines for Risk Assessment of Chemical Toxic Occupational Hazards
Jiangxi Provincial Standard of the People's Republic of China
- DB36/T 946-2017 Standards for evaluating the status quo of occupational hazards in employers
Guangxi Provincial Standard of the People's Republic of China
- DB45/T 2824-2023 Application Guide for Performance Excellence Evaluation Criteria in Vocational Colleges
- DB45/T 1725-2018 Detailed Rules for Evaluation of Occupational Hazard Control Effects in Construction Projects of Papermaking Enterprises
Professional Standard - Petroleum
- SY/T 6284-2008 Monitoring and evaluating specification of occupational hazards work site in petroleum enterprise
中国气象局
- QX/T 407-2017 Occupational ability evaluation for inspection technicians of lightning protection system
Liaoning Provincial Standard of the People's Republic of China
- DB2102/T 0039.2-2022 Information Technology Vocational Skills Assessment Guidelines Part 2: Integrated Implementation
- DB21/T 1965-2012 Occupational Health Evaluation Specifications for Commercial Road Transport Drivers
- DB2102/T 0039.1-2022 Information Technology Occupational Skills Assessment Guide Part 1: Software Development
Jiangsu Provincial Standard of the People's Republic of China
- DB32/T 2019-2011 Harmonious Labor Relations Enterprise Evaluation Standards
- DB3210/T 1146-2023 "Good canteen for employees" construction and evaluation norms
- DB32/T 2019-2019 Harmonious Labor Relations Enterprise Evaluation Standards
- DB3205/T 1120-2024 Skill quality requirements and evaluation standards for apprentices in dual-system vocational education
Professional Standard - Surveying and Mapping
- CH/T 1048-2019 Surveying & mapping /geographic information-occupations classification and capability evaluation
Chongqing Provincial Standard of the People's Republic of China
- DB50/T 794-2017 Harmonious Labor Relations Enterprise Evaluation Standards
Hunan Provincial Standard of the People's Republic of China
- DB43/T 2233-2021 Harmonious Labor Relations Enterprise Evaluation Standards
Professional Standard - Business
- SB/T 11089-2014 Norms of nurturing competence and evaluation for specialities of trade and commerce at vocational colleges
Fujian Provincial Standard of the People's Republic of China
- DB35/T 1813-2018 Harmonious Labor Relations Enterprise Evaluation Standards
- DB3502/T 131-2024 Property service evaluation specifications for office areas of government agencies
Ningxia Provincial Standard of the People's Republic of China
- DB64/T 1170-2016 Procedures for compiling reports on status evaluation of safety and occupational hazards in hazardous chemicals enterprises
Shandong Provincial Standard of the People's Republic of China
- DB37/T 4077-2020 Evaluation Standards for Enterprises with Harmonious Labor Relations at the Provincial Level
International Organization for Standardization (ISO)
- ISO/DIS 45004 Occupational health and safety management — Guidelines on performance evaluation
- ISO/FDIS 45004:2023 Occupational health and safety management — Guidelines on performance evaluation
PT-IPQ
- D H 91-1974 General introduction and evaluation of PREDIANA
- D H 132-1977 A general introduction and evaluation of SUCOL
- D H 157-1979 A general introduction and evaluation of UNIFIX
- DH 105-1975 A general introduction and evaluation of PRECOL
- D H 99-1974 General introduction and evaluation of PREVIGAL
- H D 148-1979 General introduction and evaluation of PAVIPREL
- DH 86-1973 A general introduction and evaluation of OMNIA
- DH 100-1974 A general introduction and evaluation of PREFOR
- LNEC 22-1965 A general introduction and evaluation of SUCOL
- D H 154-1979 A general introduction and evaluation of CIPROL
- LNEC 23-1966 A general introduction and evaluation of SANILAR
- D H 125-1977 General introduction and evaluation of CIVIARGUS
- DH 179-1981 General introduction and evaluation of VIGOPOR
- D H 150-1979 A general introduction and evaluation about ARTEBET?O
- D H 174-1981 A general introduction and evaluation about VICASPR?
- D H 121-1976 A general introduction and evaluation of FAPRE
- D H 135-1978 General introduction and evaluation of PAVIMOLDE
- D H 176-1981 A general introduction and evaluation of VIGOTEL
- D H 138-1978 A general introduction and evaluation about VIPRAL
- D H 140-1978 General introduction and evaluation of CERVAL
- D H 169-1980 General introduction and evaluation of PREMOTAL
- D H 158-1979 General introduction and evaluation of BLOCOVIGA
- D H 142-1978 General introduction and evaluation of PRECOMATE
- LNEC 20-1965 A general introduction and evaluation of GOMASE
- D H 161-1980 A general introduction and evaluation of CERPOL
- DH 181-1981 A general introduction and evaluation about PREBEL
- D H 143-1978 A general introduction and evaluation of ANESTOR
- D H 124-1977 A general introduction and evaluation of PREMAC
- LNEC 24-1966 A general introduction and evaluation about SUCOL
- D H 160-1979 General introduction and evaluation of PREVIFER
- DH 186-1981 General introduction and evaluation of PREVICON
- D H 172-1980 A general introduction and evaluation about PREFIX
- D H 177-1981 A general introduction and evaluation of PLACFORT
- D H 127-1977 A general introduction and evaluation of FARCIL
- DH 130-1977 General introduction and evaluation of PRECLARO
- D H 119-1976 A general introduction and evaluation about ELG?
- D H 162-1980 General introduction and evaluation of VIGOBLOCO
- D H 141-1978 A general introduction and evaluation about PATIAL
- D H 111-1975 General introduction and evaluation of NOVOBRA
- DH 188-1982 A general introduction and evaluation of SOPREF
- DH 184-1981 A general introduction and evaluation about VIPAX
- D H 164-1980 General introduction and evaluation of VIBET?O
- D H 122-1976 A general introduction and evaluation of SOBE T?O
- D H 126-1977 A general introduction and evaluation of GR?SIL
- D H 131-1977 General introduction and evaluation of PAVIL ECA
- D H 95-1974 About J. P A general introduction and evaluation of Portugal
- D H 149-1979 General introduction and evaluation of DAVIGA-DC (terrestrial)
- D H 115-1976 General introduction and evaluation of P type PREFOR
- D H 129-1977 General introduction and evaluation of PAVIM EL
British Standards Institution (BSI)
- BIP 3094-2013 The OHSAS Standards and Guidance Collection. Occupational Health and Safety Systems
BE-NBN
- NBN-ISO 1999:1992 Acoustics - Determination of occupational noise exposure and estimation of noise-induced hearing impairment
German Institute for Standardization
- DIN 33430:2016 Job related proficiency assessment
American Society for Testing and Materials (ASTM)
- ASTM E2557-16 Standard Practice for Probable Maximum Loss (PML) Evaluations for Earthquake Due-Diligence Assessments
- ASTM E2557-16a Standard Practice for Probable Maximum Loss (PML) Evaluations for Earthquake Due-Diligence Assessments
BELST
- STB 52.1.01-2017 Evaluation of objects of civil rights. Evaluation of enterprises (business)
American National Standards Institute (ANSI)
- ANSI S3.44-1996 Determination of Occupational Noise Exposure and Estimation of Noise-Induced Hearing Impairment
ZA-SANS
- SANS 192:1978 Pesticides: Biological evaluation of the efficacy of molluscicides
Evaluation about career,Guidance on standards for the measurement of airborne noise and its evaluation of its effects on humans